package config

import (
	"encoding/json"
	"fmt"
	"os"
	"regexp"
	"slices"
	"strings"
	"text/template"

	"github.com/mudler/LocalAI/core/schema"
	"github.com/mudler/LocalAI/pkg/downloader"
	"github.com/mudler/LocalAI/pkg/functions"
	"github.com/mudler/LocalAI/pkg/reasoning"
	"github.com/mudler/cogito"
	"gopkg.in/yaml.v3"
)

const (
	RAND_SEED = -1
)

// @Description TTS configuration
type TTSConfig struct {

	// Voice wav path or id
	Voice string `yaml:"voice,omitempty" json:"voice,omitempty"`

	AudioPath string `yaml:"audio_path,omitempty" json:"audio_path,omitempty"`
}

// @Description ModelConfig represents a model configuration
type ModelConfig struct {
	modelConfigFile          string `yaml:"-" json:"-"`
	modelTemplate            string `yaml:"-" json:"-"`
	schema.PredictionOptions `yaml:"parameters,omitempty" json:"parameters,omitempty"`
	Name                     string `yaml:"name,omitempty" json:"name,omitempty"`

	F16                 *bool               `yaml:"f16,omitempty" json:"f16,omitempty"`
	Threads             *int                `yaml:"threads,omitempty" json:"threads,omitempty"`
	Debug               *bool               `yaml:"debug,omitempty" json:"debug,omitempty"`
	Roles               map[string]string   `yaml:"roles,omitempty" json:"roles,omitempty"`
	Embeddings          *bool               `yaml:"embeddings,omitempty" json:"embeddings,omitempty"`
	Backend             string              `yaml:"backend,omitempty" json:"backend,omitempty"`
	TemplateConfig      TemplateConfig      `yaml:"template,omitempty" json:"template,omitempty"`
	KnownUsecaseStrings []string            `yaml:"known_usecases,omitempty" json:"known_usecases,omitempty"`
	KnownUsecases       *ModelConfigUsecase `yaml:"-" json:"-"`
	Pipeline            Pipeline            `yaml:"pipeline,omitempty" json:"pipeline,omitempty"`

	PromptStrings, InputStrings                []string       `yaml:"-" json:"-"`
	InputToken                                 [][]int        `yaml:"-" json:"-"`
	functionCallString, functionCallNameString string         `yaml:"-" json:"-"`
	ResponseFormat                             string         `yaml:"-" json:"-"`
	ResponseFormatMap                          map[string]any `yaml:"-" json:"-"`

	// MediaMarker is the runtime-discovered multimodal marker the backend expects
	// in the prompt (e.g. "<__media__>" or a random "<__media_<rand>__>" picked by
	// llama.cpp). Populated on first successful ModelMetadata call. Empty until
	// then — callers must fall back to templates.DefaultMultiMediaMarker.
	MediaMarker string `yaml:"-" json:"-"`

	FunctionsConfig functions.FunctionsConfig `yaml:"function,omitempty" json:"function,omitempty"`
	ReasoningConfig reasoning.Config          `yaml:"reasoning,omitempty" json:"reasoning,omitempty"`

	FeatureFlag FeatureFlag `yaml:"feature_flags,omitempty" json:"feature_flags,omitempty"` // Feature Flag registry. We move fast, and features may break on a per model/backend basis. Registry for (usually temporary) flags that indicate aborting something early.
	// LLM configs (GPT4ALL, Llama.cpp, ...)
	LLMConfig `yaml:",inline" json:",inline"`

	// Diffusers
	Diffusers Diffusers `yaml:"diffusers,omitempty" json:"diffusers,omitempty"`
	Step      int       `yaml:"step,omitempty" json:"step,omitempty"`

	// GRPC Options
	GRPC GRPC `yaml:"grpc,omitempty" json:"grpc,omitempty"`

	// TTS specifics
	TTSConfig `yaml:"tts,omitempty" json:"tts,omitempty"`

	// CUDA
	// Explicitly enable CUDA or not (some backends might need it)
	CUDA bool `yaml:"cuda,omitempty" json:"cuda,omitempty"`

	DownloadFiles []File `yaml:"download_files,omitempty" json:"download_files,omitempty"`

	Description string `yaml:"description,omitempty" json:"description,omitempty"`
	Usage       string `yaml:"usage,omitempty" json:"usage,omitempty"`
	Disabled    *bool  `yaml:"disabled,omitempty" json:"disabled,omitempty"`
	Pinned      *bool  `yaml:"pinned,omitempty" json:"pinned,omitempty"`

	// ConcurrencyGroups declares per-node mutual-exclusion groups: the model
	// cannot be loaded alongside another model that shares any group name.
	// See docs/content/advanced/vram-management.md for usage.
	ConcurrencyGroups []string `yaml:"concurrency_groups,omitempty" json:"concurrency_groups,omitempty"`

	Options   []string `yaml:"options,omitempty" json:"options,omitempty"`
	Overrides []string `yaml:"overrides,omitempty" json:"overrides,omitempty"`

	MCP    MCPConfig       `yaml:"mcp,omitempty" json:"mcp,omitempty"`
	Agent  AgentConfig     `yaml:"agent,omitempty" json:"agent,omitempty"`
	PII    PIIConfig       `yaml:"pii,omitempty" json:"pii,omitempty"`
	Router RouterConfig    `yaml:"router,omitempty" json:"router,omitempty"`
	Proxy  ProxyConfig     `yaml:"proxy,omitempty" json:"proxy,omitempty"`
	MITM   MITMModelConfig `yaml:"mitm,omitempty" json:"mitm,omitempty"`
	Limits LimitsConfig    `yaml:"limits,omitempty" json:"limits,omitempty"`
}

// @Description Admission-control limits applied per request. The
// admission middleware enforces these before invoking the handler;
// requests that exceed a limit get 503 with a Retry-After hint so
// clients back off rather than pile on. Per-model so cloud passthroughs
// can have a stricter ceiling than local models.
type LimitsConfig struct {
	// MaxConcurrent caps simultaneous in-flight requests for this
	// model. 0 = unlimited (default). Useful for cloud-passthrough
	// configs where the upstream rate-limits aggressively, or for
	// local backends whose memory budget tops out before LocalAI's
	// queue depth would.
	MaxConcurrent int `yaml:"max_concurrent,omitempty" json:"max_concurrent,omitempty"`

	// RetryAfterSeconds advises clients how long to wait before
	// retrying when admission rejects. 0 defaults to 1s — enough to
	// let an in-flight request finish on a busy local model. The
	// value is sent verbatim in the Retry-After response header.
	RetryAfterSeconds int `yaml:"retry_after_seconds,omitempty" json:"retry_after_seconds,omitempty"`
}

// @Description MITM intercept binding for the model. When the cloudproxy
// MITM listener is enabled and any host listed here appears in a CONNECT,
// the proxy uses THIS model config's pii: settings to filter the
// intercepted body. Strict 1-to-1: a host claimed by two configs is a
// configuration error and disables the MITM listener until resolved.
//
// Lets an admin pair a host (api.anthropic.com) with the model's
// PII overrides without maintaining a parallel per-host map.
type MITMModelConfig struct {
	// Hosts is the list of hostnames this model claims for MITM
	// interception. Each entry must be unique across all model configs.
	Hosts []string `yaml:"hosts,omitempty" json:"hosts,omitempty"`
}

// @Description Cloud proxy configuration. The cloud-proxy backend
// forwards a model's traffic to an external provider. Two modes:
//
//   - mode: passthrough — client and upstream must speak the same wire
//     format; the backend ships the raw request body to the upstream
//     URL and streams the response back untouched. The streaming PII
//     filter still runs because it operates on extracted token text.
//
//   - mode: translate — the backend converts LocalAI's internal proto
//     to the provider's wire format and back. Unlocks cross-provider
//     routing (OpenAI client → Anthropic upstream, etc.) at the cost
//     of dropping provider-specific extensions that the internal proto
//     doesn't model.
type ProxyConfig struct {
	// UpstreamURL is the full POST endpoint, e.g.
	// https://api.openai.com/v1/chat/completions or
	// https://api.anthropic.com/v1/messages. Required.
	UpstreamURL string `yaml:"upstream_url,omitempty" json:"upstream_url,omitempty"`

	// Mode selects passthrough (wire-perfect) or translate (full
	// control via internal proto). Empty defaults to passthrough.
	Mode string `yaml:"mode,omitempty" json:"mode,omitempty"`

	// Provider identifies the upstream's wire format for translate
	// mode (openai, anthropic). Ignored in passthrough mode — the
	// wire format there is whatever the client sent.
	Provider string `yaml:"provider,omitempty" json:"provider,omitempty"`

	// APIKeyEnv names the environment variable holding the upstream
	// API key. Mutually exclusive with APIKeyFile. Both empty is
	// allowed (no-auth upstreams).
	APIKeyEnv string `yaml:"api_key_env,omitempty" json:"api_key_env,omitempty"`

	// APIKeyFile is a path to a file whose contents are the upstream
	// API key. Trailing whitespace is trimmed. Mutually exclusive
	// with APIKeyEnv. The integration point for K8s secret mounts,
	// Vault agent files, and similar external-secret workflows.
	APIKeyFile string `yaml:"api_key_file,omitempty" json:"api_key_file,omitempty"`

	// UpstreamModel overrides the model name sent to the upstream.
	// Useful when the LocalAI-facing model alias differs from the
	// upstream's canonical name (e.g. local "claude-strict" maps to
	// upstream "claude-3-5-sonnet-20241022"). Empty means forward
	// the client's model field unchanged.
	UpstreamModel string `yaml:"upstream_model,omitempty" json:"upstream_model,omitempty"`

	// RequestTimeoutSeconds caps the upstream request duration. 0
	// means no per-request timeout (only the request context, which
	// is bound to the client connection, applies).
	RequestTimeoutSeconds int `yaml:"request_timeout_seconds,omitempty" json:"request_timeout_seconds,omitempty"`
}

// Proxy mode names. Validate() normalises an empty Mode to
// ProxyModePassthrough so downstream code only sees concrete values.
const (
	ProxyModePassthrough = "passthrough"
	ProxyModeTranslate   = "translate"
)

// Proxy provider names. Only meaningful in translate mode, where the
// cloud-proxy backend picks the wire format to use against the
// upstream URL.
const (
	ProxyProviderOpenAI    = "openai"
	ProxyProviderAnthropic = "anthropic"
)

// IsCloudProxyBackendPassthrough reports whether this model uses the
// cloud-proxy gRPC backend in passthrough mode. Empty Mode counts as
// passthrough (SetDefaults normalises it, but Validate accepts empty
// too — handlers should not rely on a particular call order).
func (c *ModelConfig) IsCloudProxyBackendPassthrough() bool {
	if c.Backend != "cloud-proxy" {
		return false
	}
	return c.Proxy.Mode == "" || c.Proxy.Mode == ProxyModePassthrough
}

// @Description Intelligent routing configuration. When a model declares
// a Router block, requests addressed to it are reclassified at runtime
// and dispatched to one of the named candidates. The router rewrites
// input.Model in-place, then the standard model-resolution path picks
// up the resolved config — meaning ACL checks, disabled-state, and
// per-model PII still run against the chosen target.
//
// Depth-1 invariant: candidates must NOT themselves carry a Router
// block. The router's "smart-router → claude-strict → cloud-proxy"
// chain is fine, but "router-A → router-B → claude" is rejected at
// config load to keep the dispatch graph acyclic and predictable. The
// middleware also asserts depth ≤ 1 at runtime as a defensive check.
type RouterConfig struct {
	// Classifier picks the implementation. Only "score" ships today:
	// it asks the classifier model to score every Policy label as a
	// continuation of the routing prompt and reads off the
	// distribution. Empty defaults to "score".
	Classifier string `yaml:"classifier,omitempty" json:"classifier,omitempty"`

	// Policies is the label vocabulary the classifier scores over.
	// Each policy carries a natural-language description that ends up
	// in the system prompt the classifier model sees — short, action-
	// oriented sentences work best ("writing or debugging code",
	// "small talk", ...). The Score classifier picks the subset of
	// labels whose softmax probability passes ActivationThreshold.
	Policies []RouterPolicy `yaml:"policies,omitempty" json:"policies,omitempty"`

	// Candidates is the routing table — each entry binds a downstream
	// model to a set of labels it can serve. The middleware picks the
	// FIRST candidate whose Labels are a superset of the active label
	// set from the classifier. Admins order this list smallest →
	// largest so a query that needs one label routes to the smallest
	// capable model, while a query that needs multiple falls to a
	// bigger candidate that covers them all.
	Candidates []RouterCandidate `yaml:"candidates,omitempty" json:"candidates,omitempty"`

	// Fallback is the model used when no candidate matches the active
	// label set, or when the classifier returns nothing above
	// threshold. Empty fallback means router failures bubble up as
	// 500 — fail-fast, not silent-bypass.
	Fallback string `yaml:"fallback,omitempty" json:"fallback,omitempty"`

	// ClassifierModel names the model the Score classifier scores
	// against (Arch-Router-1.5B is the canonical choice).
	ClassifierModel string `yaml:"classifier_model,omitempty" json:"classifier_model,omitempty"`

	// ClassifierCacheSize bounds the per-prompt memo cache that
	// amortises the classifier round-trip across repeat probes.
	// 0 disables the cache. Default 1024.
	ClassifierCacheSize int `yaml:"classifier_cache_size,omitempty" json:"classifier_cache_size,omitempty"`

	// ActivationThreshold is the softmax-probability floor a policy
	// must clear to be considered "active" for the request. 0
	// defaults to a sensible value (~0.15) inside the classifier.
	// Higher → narrower routes (single-label dominant); lower →
	// more multi-label activations.
	ActivationThreshold float64 `yaml:"activation_threshold,omitempty" json:"activation_threshold,omitempty"`

	// ClassifierSystemTemplate overrides the routing system prompt
	// the score classifier feeds to its classifier_model. Go
	// text/template + Sprig, executed with `.Policies []ScorePolicy`
	// (Label + Description fields). Empty falls back to the built-in
	// Arch-Router-shaped template (route-listing block + JSON output
	// schema). Override when the classifier model was trained on a
	// different schema (e.g. bare label output, XML route block) or
	// when the routing instructions need to be in a different
	// language. The candidate format scored against the model is
	// fixed at `{"route": "<label>"}` and IS NOT templated — keep
	// your override's output schema instruction matching that, or
	// the per-candidate scores degenerate.
	ClassifierSystemTemplate string `yaml:"classifier_system_template,omitempty" json:"classifier_system_template,omitempty"`

	// ScoreNormalization picks how the score classifier collapses
	// per-candidate joint log-probs into the softmax input.
	//   - ""/"raw": use joint log-prob as-is (default). Matches the
	//     distribution the classifier model was trained against — the
	//     route the model would actually emit if decoded freely.
	//   - "mean": divide by candidate token count. Fairer to long
	//     labels (their joint log-prob is mechanically smaller because
	//     it sums more negatives), but off-distribution for models
	//     trained to emit fixed-format outputs like Arch-Router's
	//     {"route": "name"}.
	// Future modes (e.g. "weighted_mean") will land here too.
	ScoreNormalization string `yaml:"score_normalization,omitempty" json:"score_normalization,omitempty"`

	// EmbeddingCache configures the L2 cache that maps prompt
	// embeddings to past decisions, so semantically-similar prompts
	// reuse a classification instead of re-running the classifier
	// model. Omit the block to disable. See router/embedding_cache.go.
	EmbeddingCache *EmbeddingCacheConfig `yaml:"embedding_cache,omitempty" json:"embedding_cache,omitempty"`
}

// EmbeddingCacheConfig configures the L2 embedding-similarity decision
// cache. Pairs naturally with a larger / slower classifier model: the
// classifier round-trip is amortised across paraphrases of the same
// intent. The cache uses the standard /v1/embeddings backend for
// vector generation and the local-store gRPC surface for KNN search.
type EmbeddingCacheConfig struct {
	// EmbeddingModel names the loaded LocalAI model used to embed
	// router prompts. Required when the cache is enabled. Any model
	// that supports the Embeddings gRPC primitive works;
	// nomic-embed-text-v1.5 is the recommended default.
	EmbeddingModel string `yaml:"embedding_model" json:"embedding_model"`

	// SimilarityThreshold is the cosine-similarity floor a cache
	// candidate must clear to be treated as a hit. 0 picks the
	// package default (0.80). Higher → fewer false hits, higher miss
	// rate; lower → more aggressive sharing across paraphrases.
	SimilarityThreshold float64 `yaml:"similarity_threshold,omitempty" json:"similarity_threshold,omitempty"`

	// ConfidenceThreshold is the minimum classifier top-label
	// probability for a decision to be inserted into the cache. 0
	// picks the package default (0.60). Uncertain decisions are not
	// cached so they can't poison future paraphrases.
	ConfidenceThreshold float64 `yaml:"confidence_threshold,omitempty" json:"confidence_threshold,omitempty"`

	// StoreName overrides the local-store collection name used for
	// this router's cache. Empty defaults to "router-cache-<router>"
	// where <router> is the parent model name. Useful when two
	// router models should share a cache (rare).
	StoreName string `yaml:"store_name,omitempty" json:"store_name,omitempty"`
}

// RouterPolicy is one entry in the label vocabulary. The label string
// is what the classifier model emits and what candidates reference in
// their Labels field; the description is the natural-language hint
// fed to the classifier so it can match user intent against the label
// space.
type RouterPolicy struct {
	Label       string `yaml:"label" json:"label"`
	Description string `yaml:"description" json:"description"`
}

// RouterCandidate names a downstream model and the policy labels it
// is willing to serve. Labels are matched as a set: the middleware
// picks the first candidate whose Labels is a superset of the
// classifier's active set.
type RouterCandidate struct {
	Model  string   `yaml:"model" json:"model"`
	Labels []string `yaml:"labels" json:"labels"`
}

// HasRouter returns true when the model declares a router config with
// at least one candidate. Used by the RouteModel middleware to decide
// whether to engage the classifier.
func (c *ModelConfig) HasRouter() bool {
	return len(c.Router.Candidates) > 0
}

// @Description PII filtering configuration. PII redaction is per-model so
// that local models don't pay the latency or behaviour change of regex
// scanning, while cloud-bound traffic (cloud-proxy backend) can default to
// on. Setting Enabled explicitly always wins over the backend default.
type PIIConfig struct {
	// Enabled toggles redaction for this model. When unset (zero value),
	// the resolved default depends on Backend: cloud-proxy defaults to
	// true, everything else to false. A pointer is used so the absence of
	// the YAML key is distinguishable from explicit false.
	Enabled *bool `yaml:"enabled,omitempty" json:"enabled,omitempty"`

	// Patterns lets a model upgrade or downgrade individual pattern
	// actions (mask | block | route_local) relative to the global
	// defaults loaded from --pii-config / DefaultPatterns. Pattern IDs
	// not listed inherit the global action. The regex itself stays
	// global — only the action is settable per-model.
	Patterns []PIIPatternOverride `yaml:"patterns,omitempty" json:"patterns,omitempty"`
}

// @Description Per-model action override for a single PII pattern.
type PIIPatternOverride struct {
	ID     string `yaml:"id" json:"id"`
	Action string `yaml:"action" json:"action"`
}

// PIIIsEnabled returns the resolved PII state for this model. Single
// source of truth for the gating decision so the middleware and the
// /api/middleware/status admin view agree.
func (c *ModelConfig) PIIIsEnabled() bool {
	if c.PII.Enabled != nil {
		return *c.PII.Enabled
	}
	return c.Backend == "cloud-proxy"
}

// PIIPatternOverrides returns the per-pattern action overrides as a map
// keyed by pattern ID. The values are the raw action strings — the pii
// package validates and converts them.
//
// Returned via the documented modelPIIConfig interface in
// core/services/routing/pii/middleware.go without taking a config
// dependency on this package.
func (c *ModelConfig) PIIPatternOverrides() map[string]string {
	if len(c.PII.Patterns) == 0 {
		return nil
	}
	out := make(map[string]string, len(c.PII.Patterns))
	for _, p := range c.PII.Patterns {
		if p.ID == "" {
			continue
		}
		out[p.ID] = p.Action
	}
	return out
}

// @Description MCP configuration
type MCPConfig struct {
	Servers string `yaml:"remote,omitempty" json:"remote,omitempty"`
	Stdio   string `yaml:"stdio,omitempty" json:"stdio,omitempty"`
}

// @Description Agent configuration
type AgentConfig struct {
	MaxAttempts           int  `yaml:"max_attempts,omitempty" json:"max_attempts,omitempty"`
	MaxIterations         int  `yaml:"max_iterations,omitempty" json:"max_iterations,omitempty"`
	EnableReasoning       bool `yaml:"enable_reasoning,omitempty" json:"enable_reasoning,omitempty"`
	EnablePlanning        bool `yaml:"enable_planning,omitempty" json:"enable_planning,omitempty"`
	EnableMCPPrompts      bool `yaml:"enable_mcp_prompts,omitempty" json:"enable_mcp_prompts,omitempty"`
	EnablePlanReEvaluator bool `yaml:"enable_plan_re_evaluator,omitempty" json:"enable_plan_re_evaluator,omitempty"`
	DisableSinkState      bool `yaml:"disable_sink_state,omitempty" json:"disable_sink_state,omitempty"`
	LoopDetection         int  `yaml:"loop_detection,omitempty" json:"loop_detection,omitempty"`
	MaxAdjustmentAttempts int  `yaml:"max_adjustment_attempts,omitempty" json:"max_adjustment_attempts,omitempty"`
	ForceReasoningTool    bool `yaml:"force_reasoning_tool,omitempty" json:"force_reasoning_tool,omitempty"`
}

// HasMCPServers returns true if any MCP servers (remote or stdio) are configured.
func (c MCPConfig) HasMCPServers() bool {
	return c.Servers != "" || c.Stdio != ""
}

func (c *MCPConfig) MCPConfigFromYAML() (MCPGenericConfig[MCPRemoteServers], MCPGenericConfig[MCPSTDIOServers], error) {
	var remote MCPGenericConfig[MCPRemoteServers]
	var stdio MCPGenericConfig[MCPSTDIOServers]

	if err := yaml.Unmarshal([]byte(c.Servers), &remote); err != nil {
		return remote, stdio, err
	}

	if err := yaml.Unmarshal([]byte(c.Stdio), &stdio); err != nil {
		return remote, stdio, err
	}
	return remote, stdio, nil
}

// @Description MCP generic configuration
type MCPGenericConfig[T any] struct {
	Servers T `yaml:"mcpServers,omitempty" json:"mcpServers,omitempty"`
}
type MCPRemoteServers map[string]MCPRemoteServer
type MCPSTDIOServers map[string]MCPSTDIOServer

// @Description MCP remote server configuration
type MCPRemoteServer struct {
	URL   string `json:"url,omitempty"`
	Token string `json:"token,omitempty"`
}

// @Description MCP STDIO server configuration
type MCPSTDIOServer struct {
	Args    []string          `json:"args,omitempty"`
	Env     map[string]string `json:"env,omitempty"`
	Command string            `json:"command,omitempty"`
}

// @Description Pipeline defines other models to use for audio-to-audio
type Pipeline struct {
	TTS           string `yaml:"tts,omitempty" json:"tts,omitempty"`
	LLM           string `yaml:"llm,omitempty" json:"llm,omitempty"`
	Transcription string `yaml:"transcription,omitempty" json:"transcription,omitempty"`
	VAD           string `yaml:"vad,omitempty" json:"vad,omitempty"`
}

// @Description File configuration for model downloads
type File struct {
	Filename string         `yaml:"filename,omitempty" json:"filename,omitempty"`
	SHA256   string         `yaml:"sha256,omitempty" json:"sha256,omitempty"`
	URI      downloader.URI `yaml:"uri,omitempty" json:"uri,omitempty"`
}

type FeatureFlag map[string]*bool

func (ff FeatureFlag) Enabled(s string) bool {
	if v, exists := ff[s]; exists && v != nil {
		return *v
	}
	return false
}

// @Description GRPC configuration
type GRPC struct {
	Attempts          int `yaml:"attempts,omitempty" json:"attempts,omitempty"`
	AttemptsSleepTime int `yaml:"attempts_sleep_time,omitempty" json:"attempts_sleep_time,omitempty"`
}

// @Description Diffusers configuration
type Diffusers struct {
	CUDA             bool   `yaml:"cuda,omitempty" json:"cuda,omitempty"`
	PipelineType     string `yaml:"pipeline_type,omitempty" json:"pipeline_type,omitempty"`
	SchedulerType    string `yaml:"scheduler_type,omitempty" json:"scheduler_type,omitempty"`
	EnableParameters string `yaml:"enable_parameters,omitempty" json:"enable_parameters,omitempty"` // A list of comma separated parameters to specify
	IMG2IMG          bool   `yaml:"img2img,omitempty" json:"img2img,omitempty"`                     // Image to Image Diffuser
	ClipSkip         int    `yaml:"clip_skip,omitempty" json:"clip_skip,omitempty"`                 // Skip every N frames
	ClipModel        string `yaml:"clip_model,omitempty" json:"clip_model,omitempty"`               // Clip model to use
	ClipSubFolder    string `yaml:"clip_subfolder,omitempty" json:"clip_subfolder,omitempty"`       // Subfolder to use for clip model
	ControlNet       string `yaml:"control_net,omitempty" json:"control_net,omitempty"`
}

// @Description LLMConfig is a struct that holds the configuration that are generic for most of the LLM backends.
type LLMConfig struct {
	SystemPrompt    string   `yaml:"system_prompt,omitempty" json:"system_prompt,omitempty"`
	TensorSplit     string   `yaml:"tensor_split,omitempty" json:"tensor_split,omitempty"`
	MainGPU         string   `yaml:"main_gpu,omitempty" json:"main_gpu,omitempty"`
	RMSNormEps      float32  `yaml:"rms_norm_eps,omitempty" json:"rms_norm_eps,omitempty"`
	NGQA            int32    `yaml:"ngqa,omitempty" json:"ngqa,omitempty"`
	PromptCachePath string   `yaml:"prompt_cache_path,omitempty" json:"prompt_cache_path,omitempty"`
	PromptCacheAll  *bool    `yaml:"prompt_cache_all,omitempty" json:"prompt_cache_all,omitempty"`
	PromptCacheRO   bool     `yaml:"prompt_cache_ro,omitempty" json:"prompt_cache_ro,omitempty"`
	MirostatETA     *float64 `yaml:"mirostat_eta,omitempty" json:"mirostat_eta,omitempty"`
	MirostatTAU     *float64 `yaml:"mirostat_tau,omitempty" json:"mirostat_tau,omitempty"`
	Mirostat        *int     `yaml:"mirostat,omitempty" json:"mirostat,omitempty"`
	NGPULayers      *int     `yaml:"gpu_layers,omitempty" json:"gpu_layers,omitempty"`
	MMap            *bool    `yaml:"mmap,omitempty" json:"mmap,omitempty"`
	MMlock          *bool    `yaml:"mmlock,omitempty" json:"mmlock,omitempty"`
	LowVRAM         *bool    `yaml:"low_vram,omitempty" json:"low_vram,omitempty"`
	Reranking       *bool    `yaml:"reranking,omitempty" json:"reranking,omitempty"`
	Grammar         string   `yaml:"grammar,omitempty" json:"grammar,omitempty"`
	StopWords       []string `yaml:"stopwords,omitempty" json:"stopwords,omitempty"`
	Cutstrings      []string `yaml:"cutstrings,omitempty" json:"cutstrings,omitempty"`
	ExtractRegex    []string `yaml:"extract_regex,omitempty" json:"extract_regex,omitempty"`
	TrimSpace       []string `yaml:"trimspace,omitempty" json:"trimspace,omitempty"`
	TrimSuffix      []string `yaml:"trimsuffix,omitempty" json:"trimsuffix,omitempty"`

	ContextSize          *int             `yaml:"context_size,omitempty" json:"context_size,omitempty"`
	NUMA                 bool             `yaml:"numa,omitempty" json:"numa,omitempty"`
	LoraAdapter          string           `yaml:"lora_adapter,omitempty" json:"lora_adapter,omitempty"`
	LoraBase             string           `yaml:"lora_base,omitempty" json:"lora_base,omitempty"`
	LoraAdapters         []string         `yaml:"lora_adapters,omitempty" json:"lora_adapters,omitempty"`
	LoraScales           []float32        `yaml:"lora_scales,omitempty" json:"lora_scales,omitempty"`
	LoraScale            float32          `yaml:"lora_scale,omitempty" json:"lora_scale,omitempty"`
	NoMulMatQ            bool             `yaml:"no_mulmatq,omitempty" json:"no_mulmatq,omitempty"`
	DraftModel           string           `yaml:"draft_model,omitempty" json:"draft_model,omitempty"`
	NDraft               int32            `yaml:"n_draft,omitempty" json:"n_draft,omitempty"`
	Quantization         string           `yaml:"quantization,omitempty" json:"quantization,omitempty"`
	LoadFormat           string           `yaml:"load_format,omitempty" json:"load_format,omitempty"`
	GPUMemoryUtilization float32          `yaml:"gpu_memory_utilization,omitempty" json:"gpu_memory_utilization,omitempty"` // vLLM
	TrustRemoteCode      bool             `yaml:"trust_remote_code,omitempty" json:"trust_remote_code,omitempty"`           // vLLM
	EnforceEager         bool             `yaml:"enforce_eager,omitempty" json:"enforce_eager,omitempty"`                   // vLLM
	SwapSpace            int              `yaml:"swap_space,omitempty" json:"swap_space,omitempty"`                         // vLLM
	MaxModelLen          int              `yaml:"max_model_len,omitempty" json:"max_model_len,omitempty"`                   // vLLM
	TensorParallelSize   int              `yaml:"tensor_parallel_size,omitempty" json:"tensor_parallel_size,omitempty"`     // vLLM
	DisableLogStatus     bool             `yaml:"disable_log_stats,omitempty" json:"disable_log_stats,omitempty"`           // vLLM
	DType                string           `yaml:"dtype,omitempty" json:"dtype,omitempty"`                                   // vLLM
	LimitMMPerPrompt     LimitMMPerPrompt `yaml:"limit_mm_per_prompt,omitempty" json:"limit_mm_per_prompt,omitempty"`       // vLLM
	// EngineArgs is a backend-native passthrough applied to the engine constructor
	// (e.g. vLLM AsyncEngineArgs). Values may be primitives or nested maps; nested
	// maps materialise into the backend's nested config dataclasses (e.g.
	// SpeculativeConfig, KVTransferConfig, CompilationConfig). Unknown keys cause
	// the backend to fail LoadModel with a list of valid names.
	EngineArgs map[string]any `yaml:"engine_args,omitempty" json:"engine_args,omitempty"`
	MMProj     string         `yaml:"mmproj,omitempty" json:"mmproj,omitempty"`

	FlashAttention *string `yaml:"flash_attention,omitempty" json:"flash_attention,omitempty"`
	NoKVOffloading bool    `yaml:"no_kv_offloading,omitempty" json:"no_kv_offloading,omitempty"`
	CacheTypeK     string  `yaml:"cache_type_k,omitempty" json:"cache_type_k,omitempty"`
	CacheTypeV     string  `yaml:"cache_type_v,omitempty" json:"cache_type_v,omitempty"`

	RopeScaling string `yaml:"rope_scaling,omitempty" json:"rope_scaling,omitempty"`
	ModelType   string `yaml:"type,omitempty" json:"type,omitempty"`

	YarnExtFactor  float32 `yaml:"yarn_ext_factor,omitempty" json:"yarn_ext_factor,omitempty"`
	YarnAttnFactor float32 `yaml:"yarn_attn_factor,omitempty" json:"yarn_attn_factor,omitempty"`
	YarnBetaFast   float32 `yaml:"yarn_beta_fast,omitempty" json:"yarn_beta_fast,omitempty"`
	YarnBetaSlow   float32 `yaml:"yarn_beta_slow,omitempty" json:"yarn_beta_slow,omitempty"`

	CFGScale float32 `yaml:"cfg_scale,omitempty" json:"cfg_scale,omitempty"` // Classifier-Free Guidance Scale
}

// @Description LimitMMPerPrompt is a struct that holds the configuration for the limit-mm-per-prompt config in vLLM
type LimitMMPerPrompt struct {
	LimitImagePerPrompt int `yaml:"image,omitempty" json:"image,omitempty"`
	LimitVideoPerPrompt int `yaml:"video,omitempty" json:"video,omitempty"`
	LimitAudioPerPrompt int `yaml:"audio,omitempty" json:"audio,omitempty"`
}

// @Description TemplateConfig is a struct that holds the configuration of the templating system
type TemplateConfig struct {
	// Chat is the template used in the chat completion endpoint
	Chat string `yaml:"chat,omitempty" json:"chat,omitempty"`

	// ChatMessage is the template used for chat messages
	ChatMessage string `yaml:"chat_message,omitempty" json:"chat_message,omitempty"`

	// Completion is the template used for completion requests
	Completion string `yaml:"completion,omitempty" json:"completion,omitempty"`

	// Edit is the template used for edit completion requests
	Edit string `yaml:"edit,omitempty" json:"edit,omitempty"`

	// Functions is the template used when tools are present in the client requests
	Functions string `yaml:"function,omitempty" json:"function,omitempty"`

	// UseTokenizerTemplate is a flag that indicates if the tokenizer template should be used.
	// Note: this is mostly consumed for backends such as vllm and transformers
	// that can use the tokenizers specified in the JSON config files of the models
	UseTokenizerTemplate bool `yaml:"use_tokenizer_template,omitempty" json:"use_tokenizer_template,omitempty"`

	// JoinChatMessagesByCharacter is a string that will be used to join chat messages together.
	// It defaults to \n
	JoinChatMessagesByCharacter *string `yaml:"join_chat_messages_by_character,omitempty" json:"join_chat_messages_by_character,omitempty"`

	Multimodal string `yaml:"multimodal,omitempty" json:"multimodal,omitempty"`

	ReplyPrefix string `yaml:"reply_prefix,omitempty" json:"reply_prefix,omitempty"`
}

func (c *ModelConfig) syncKnownUsecasesFromString() {
	c.KnownUsecases = GetUsecasesFromYAML(c.KnownUsecaseStrings)
	// Make sure the usecases are valid, we rewrite with what we identified
	c.KnownUsecaseStrings = []string{}
	for k, usecase := range GetAllModelConfigUsecases() {
		if c.HasUsecases(usecase) {
			c.KnownUsecaseStrings = append(c.KnownUsecaseStrings, k)
		}
	}
}

func (c *ModelConfig) UnmarshalYAML(value *yaml.Node) error {
	type BCAlias ModelConfig
	var aux BCAlias
	if err := value.Decode(&aux); err != nil {
		return err
	}

	mc := ModelConfig(aux)
	*c = mc
	c.syncKnownUsecasesFromString()
	return nil
}

func (c *ModelConfig) SetFunctionCallString(s string) {
	c.functionCallString = s
}

func (c *ModelConfig) SetFunctionCallNameString(s string) {
	c.functionCallNameString = s
}

func (c *ModelConfig) ShouldUseFunctions() bool {
	return ((c.functionCallString != "none" || c.functionCallString == "") || c.ShouldCallSpecificFunction())
}

func (c *ModelConfig) ShouldCallSpecificFunction() bool {
	return len(c.functionCallNameString) > 0
}

// MMProjFileName returns the filename of the MMProj file
// If the MMProj is a URL, it will return the MD5 of the URL which is the filename
func (c *ModelConfig) MMProjFileName() string {
	uri := downloader.URI(c.MMProj)
	if uri.LooksLikeURL() {
		f, _ := uri.FilenameFromUrl()
		return f
	}

	return c.MMProj
}

func (c *ModelConfig) IsMMProjURL() bool {
	uri := downloader.URI(c.MMProj)
	return uri.LooksLikeURL()
}

func (c *ModelConfig) IsModelURL() bool {
	uri := downloader.URI(c.Model)
	return uri.LooksLikeURL()
}

// ModelID returns the identifier used to reference this model across the
// system: the configured Name, falling back to Model when Name is empty.
// This is the single source of truth for the id fed to model.WithModelID and
// the prefix-cache chain salt; both MUST agree with the router's tracking key
// or the prefix-cache salt diverges silently.
func (c ModelConfig) ModelID() string {
	if c.Name != "" {
		return c.Name
	}
	return c.Model
}

// ModelFileName returns the filename of the model
// If the model is a URL, it will return the MD5 of the URL which is the filename
func (c *ModelConfig) ModelFileName() string {
	uri := downloader.URI(c.Model)
	if uri.LooksLikeURL() {
		f, _ := uri.FilenameFromUrl()
		return f
	}

	return c.Model
}

func (c *ModelConfig) FunctionToCall() string {
	if c.functionCallNameString != "" &&
		c.functionCallNameString != "none" && c.functionCallNameString != "auto" {
		return c.functionCallNameString
	}

	return c.functionCallString
}

func (cfg *ModelConfig) SetDefaults(opts ...ConfigLoaderOption) {
	lo := &LoadOptions{}
	lo.Apply(opts...)

	ctx := lo.ctxSize
	threads := lo.threads
	f16 := lo.f16
	debug := lo.debug

	// Cloud-proxy: normalise empty Mode so downstream consumers
	// switch on two concrete values only. Validate accepts empty too,
	// but SetDefaults is the chokepoint that runs before any
	// inference path reads cfg.Proxy.Mode.
	if cfg.Proxy.Mode == "" {
		cfg.Proxy.Mode = ProxyModePassthrough
	}

	// When templating is delegated to the backend (use_tokenizer_template),
	// the backend also owns tool-call grammar generation and parsing. Sending
	// a LocalAI-generated grammar alongside overrides the backend's native
	// (name-first) tool pipeline and makes it stream the tool-call JSON back as
	// plain content (issue #10052). The GGUF auto-import path already couples
	// these two flags; enforce it here so gallery and hand-written configs that
	// set use_tokenizer_template directly stay consistent.
	if cfg.TemplateConfig.UseTokenizerTemplate {
		cfg.FunctionsConfig.GrammarConfig.NoGrammar = true
	}

	// Apply model-family-specific inference defaults before generic fallbacks.
	// This ensures gallery-installed and runtime-loaded models get optimal parameters.
	ApplyInferenceDefaults(cfg, cfg.Name, cfg.Model)

	// https://github.com/ggerganov/llama.cpp/blob/75cd4c77292034ecec587ecb401366f57338f7c0/common/sampling.h#L22
	defaultTopP := 0.95
	defaultTopK := 40
	defaultMinP := 0.0
	defaultTemp := 0.9
	// https://github.com/mudler/LocalAI/issues/2780
	defaultMirostat := 0
	defaultMirostatTAU := 5.0
	defaultMirostatETA := 0.1
	defaultTypicalP := 1.0
	defaultTFZ := 1.0
	defaultZero := 0

	trueV := true
	falseV := false

	if cfg.Seed == nil {
		//  random number generator seed
		defaultSeed := RAND_SEED
		cfg.Seed = &defaultSeed
	}

	if cfg.TopK == nil {
		cfg.TopK = &defaultTopK
	}

	if cfg.MinP == nil {
		cfg.MinP = &defaultMinP
	}

	if cfg.TypicalP == nil {
		cfg.TypicalP = &defaultTypicalP
	}

	if cfg.TFZ == nil {
		cfg.TFZ = &defaultTFZ
	}

	if cfg.MMap == nil {
		// MMap is enabled by default

		// Only exception is for Intel GPUs
		if os.Getenv("XPU") != "" {
			cfg.MMap = &falseV
		} else {
			cfg.MMap = &trueV
		}
	}

	if cfg.MMlock == nil {
		// MMlock is disabled by default
		cfg.MMlock = &falseV
	}

	if cfg.TopP == nil {
		cfg.TopP = &defaultTopP
	}
	if cfg.Temperature == nil {
		cfg.Temperature = &defaultTemp
	}

	if cfg.Maxtokens == nil {
		cfg.Maxtokens = &defaultZero
	}

	if cfg.Mirostat == nil {
		cfg.Mirostat = &defaultMirostat
	}

	if cfg.MirostatETA == nil {
		cfg.MirostatETA = &defaultMirostatETA
	}

	if cfg.MirostatTAU == nil {
		cfg.MirostatTAU = &defaultMirostatTAU
	}

	if cfg.LowVRAM == nil {
		cfg.LowVRAM = &falseV
	}

	if cfg.Embeddings == nil {
		cfg.Embeddings = &falseV
	}

	if cfg.Reranking == nil {
		cfg.Reranking = &falseV
	}

	if cfg.PromptCacheAll == nil {
		// Match upstream llama.cpp's default (common/common.h: cache_prompt = true)
		// and let cache_idle_slots / kv_unified actually do useful work; users can
		// opt out with an explicit `prompt_cache_all: false` in the model YAML.
		cfg.PromptCacheAll = &trueV
	}

	if threads == 0 {
		// Threads can't be 0
		threads = 4
	}

	if cfg.Threads == nil {
		cfg.Threads = &threads
	}

	if cfg.F16 == nil {
		cfg.F16 = &f16
	}

	if cfg.Debug == nil {
		cfg.Debug = &falseV
	}

	if debug {
		cfg.Debug = &trueV
	}

	// If a context size was provided via LoadOptions, apply it before hooks so they
	// don't override it with their own defaults.
	if ctx != 0 && cfg.ContextSize == nil {
		cfg.ContextSize = &ctx
	}
	runBackendHooks(cfg, lo.modelPath)
	cfg.syncKnownUsecasesFromString()
}

func (c *ModelConfig) Validate() (bool, error) {
	downloadedFileNames := []string{}
	for _, f := range c.DownloadFiles {
		downloadedFileNames = append(downloadedFileNames, f.Filename)
	}
	validationTargets := []string{c.Backend, c.Model, c.MMProj}
	validationTargets = append(validationTargets, downloadedFileNames...)
	// Simple validation to make sure the model can be correctly loaded
	for _, n := range validationTargets {
		if n == "" {
			continue
		}
		if strings.HasPrefix(n, string(os.PathSeparator)) ||
			strings.Contains(n, "..") {
			return false, fmt.Errorf("invalid file path: %s", n)
		}
	}

	if c.Backend != "" {
		// a regex that checks that is a string name with no special characters, except '-' and '_'
		re := regexp.MustCompile(`^[a-zA-Z0-9-_]+$`)
		if !re.MatchString(c.Backend) {
			return false, fmt.Errorf("invalid backend name: %s", c.Backend)
		}
	}

	// Validate MCP configuration if present
	if c.MCP.Servers != "" || c.MCP.Stdio != "" {
		if _, _, err := c.MCP.MCPConfigFromYAML(); err != nil {
			return false, fmt.Errorf("invalid MCP configuration: %w", err)
		}
	}

	// engine_args crosses the gRPC boundary as a JSON-encoded string. Reject
	// unmarshalable values here so a config that would silently lose user-set
	// options at load time is rejected at parse time instead.
	if len(c.EngineArgs) > 0 {
		if _, err := json.Marshal(c.EngineArgs); err != nil {
			return false, fmt.Errorf("engine_args is not JSON-serialisable: %w", err)
		}
	}

	// Cloud-proxy: at most one of api_key_env / api_key_file may be
	// set. Both empty means no Authorization header (no-auth upstream
	// or a development passthrough). The mode field accepts the empty
	// string (defaults to passthrough), "passthrough", or "translate".
	if c.Proxy.APIKeyEnv != "" && c.Proxy.APIKeyFile != "" {
		return false, fmt.Errorf("proxy: api_key_env and api_key_file are mutually exclusive")
	}
	switch c.Proxy.Mode {
	case "", ProxyModePassthrough, ProxyModeTranslate:
		// Empty is accepted at validate-time and normalised to
		// passthrough by SetDefaults so it never reaches runtime.
	default:
		return false, fmt.Errorf("proxy: unknown mode %q (expected %s or %s)",
			c.Proxy.Mode, ProxyModePassthrough, ProxyModeTranslate)
	}
	if c.Proxy.Mode == ProxyModeTranslate && c.Proxy.Provider == "" {
		return false, fmt.Errorf("proxy: translate mode requires provider (%s, %s)",
			ProxyProviderOpenAI, ProxyProviderAnthropic)
	}

	// Score on llama-cpp bypasses the slot loop and races the
	// llama_context against concurrent generation/embedding traffic
	// (see backend/cpp/llama-cpp/grpc-server.cpp on Score). Reject the
	// combination here so operators are forced to split the model.
	const scoreConflicts = FLAG_CHAT | FLAG_COMPLETION | FLAG_EMBEDDINGS
	if (c.Backend == "llama-cpp" || c.Backend == "llama") &&
		c.HasUsecases(FLAG_SCORE) && c.KnownUsecases != nil &&
		*c.KnownUsecases&scoreConflicts != 0 {
		return false, fmt.Errorf(
			"known_usecases conflict on llama-cpp: score is incompatible " +
				"with chat/completion/embeddings — split into separate model configs")
	}

	// router.score_normalization is consumed lazily by the score
	// classifier at first-request time; without load-time validation
	// a typo wouldn't surface until the first router request panicked
	// inside NewScoreClassifier. Reject unknown values here so the
	// operator sees the offending key at startup.
	switch c.Router.ScoreNormalization {
	case "", ScoreNormalizationRaw, ScoreNormalizationMean:
		// ok
	default:
		return false, fmt.Errorf("router: unknown score_normalization %q (expected %q or %q)",
			c.Router.ScoreNormalization, ScoreNormalizationRaw, ScoreNormalizationMean)
	}

	// router.classifier_system_template parses as Go text/template
	// (Sprig funcs available at execution time). Reject malformed
	// templates at load time so the operator sees the parse error
	// at startup rather than as a 500 on the first router request.
	if c.Router.ClassifierSystemTemplate != "" {
		if _, err := template.New("classifier_system").Parse(c.Router.ClassifierSystemTemplate); err != nil {
			return false, fmt.Errorf("router: classifier_system_template parse error: %w", err)
		}
	}

	return true, nil
}

// Score normalisation modes mirror router.ScoreNormalization* —
// duplicated as constants on the config package so ModelConfig.Validate
// can reject unknown values without taking a dependency on the router
// package (which already depends on config).
const (
	ScoreNormalizationRaw  = "raw"
	ScoreNormalizationMean = "mean"
)

func (c *ModelConfig) HasTemplate() bool {
	return c.TemplateConfig.Completion != "" || c.TemplateConfig.Edit != "" || c.TemplateConfig.Chat != "" || c.TemplateConfig.ChatMessage != "" || c.TemplateConfig.UseTokenizerTemplate
}

func (c *ModelConfig) GetModelConfigFile() string {
	return c.modelConfigFile
}

// GetModelTemplate returns the model's chat template if available
func (c *ModelConfig) GetModelTemplate() string {
	return c.modelTemplate
}

// IsDisabled returns true if the model is disabled
func (c *ModelConfig) IsDisabled() bool {
	return c.Disabled != nil && *c.Disabled
}

// IsPinned returns true if the model is pinned (excluded from idle unloading and eviction)
func (c *ModelConfig) IsPinned() bool {
	return c.Pinned != nil && *c.Pinned
}

// GetConcurrencyGroups returns the model's concurrency groups, normalized:
// trimmed of whitespace, empty entries dropped, deduped. Returns nil when no
// effective groups remain. The result is a fresh slice; the caller may
// mutate it without affecting the config.
func (c *ModelConfig) GetConcurrencyGroups() []string {
	if len(c.ConcurrencyGroups) == 0 {
		return nil
	}
	out := make([]string, 0, len(c.ConcurrencyGroups))
	for _, g := range c.ConcurrencyGroups {
		g = strings.TrimSpace(g)
		if g == "" || slices.Contains(out, g) {
			continue
		}
		out = append(out, g)
	}
	if len(out) == 0 {
		return nil
	}
	return out
}

type ModelConfigUsecase int

const (
	FLAG_ANY                 ModelConfigUsecase = 0b000000000000
	FLAG_CHAT                ModelConfigUsecase = 0b000000000001
	FLAG_COMPLETION          ModelConfigUsecase = 0b000000000010
	FLAG_EDIT                ModelConfigUsecase = 0b000000000100
	FLAG_EMBEDDINGS          ModelConfigUsecase = 0b000000001000
	FLAG_RERANK              ModelConfigUsecase = 0b000000010000
	FLAG_IMAGE               ModelConfigUsecase = 0b000000100000
	FLAG_TRANSCRIPT          ModelConfigUsecase = 0b000001000000
	FLAG_TTS                 ModelConfigUsecase = 0b000010000000
	FLAG_SOUND_GENERATION    ModelConfigUsecase = 0b000100000000
	FLAG_TOKENIZE            ModelConfigUsecase = 0b001000000000
	FLAG_VAD                 ModelConfigUsecase = 0b010000000000
	FLAG_VIDEO               ModelConfigUsecase = 0b100000000000
	FLAG_DETECTION           ModelConfigUsecase = 0b1000000000000
	FLAG_VISION              ModelConfigUsecase = 0b10000000000000
	FLAG_FACE_RECOGNITION    ModelConfigUsecase = 0b100000000000000
	FLAG_SPEAKER_RECOGNITION ModelConfigUsecase = 0b1000000000000000
	FLAG_AUDIO_TRANSFORM     ModelConfigUsecase = 0b10000000000000000
	FLAG_DIARIZATION         ModelConfigUsecase = 0b100000000000000000
	FLAG_REALTIME_AUDIO      ModelConfigUsecase = 0b1000000000000000000
	// Marks a model as wired for the Score gRPC primitive (joint
	// log-prob of candidate continuations under a shared prompt). Must
	// be declared explicitly via `known_usecases: [score]` — there's
	// no heuristic for it. On the llama-cpp backend, Score bypasses
	// the slot loop and races the llama_context, so Validate() refuses
	// to load a llama-cpp config that combines FLAG_SCORE with
	// chat/completion/embeddings.
	FLAG_SCORE ModelConfigUsecase = 0b10000000000000000000

	// Common Subsets
	FLAG_LLM ModelConfigUsecase = FLAG_CHAT | FLAG_COMPLETION | FLAG_EDIT
)

// ModalityGroups defines groups of usecases that belong to the same modality.
// Flags within the same group are NOT orthogonal (e.g., chat and completion are
// both text/language). A model is multimodal when its usecases span 2+ groups.
var ModalityGroups = []ModelConfigUsecase{
	FLAG_CHAT | FLAG_COMPLETION | FLAG_EDIT,                // text/language
	FLAG_VISION | FLAG_DETECTION,                           // visual understanding
	FLAG_TRANSCRIPT | FLAG_REALTIME_AUDIO,                  // speech input — realtime_audio is any-to-any, so it counts here too
	FLAG_TTS | FLAG_SOUND_GENERATION | FLAG_REALTIME_AUDIO, // audio output — and here, so a lone realtime_audio flag still reads as multimodal
	FLAG_AUDIO_TRANSFORM,                                   // audio in/out transforms
	FLAG_IMAGE | FLAG_VIDEO,                                // visual generation
}

// IsMultimodal returns true if the given usecases span two or more orthogonal
// modality groups. For example chat+vision is multimodal, but chat+completion
// is not (both belong to the text/language group).
func IsMultimodal(usecases ModelConfigUsecase) bool {
	groupCount := 0
	for _, group := range ModalityGroups {
		if usecases&group != 0 {
			groupCount++
			if groupCount >= 2 {
				return true
			}
		}
	}
	return false
}

func GetAllModelConfigUsecases() map[string]ModelConfigUsecase {
	return map[string]ModelConfigUsecase{
		// Note: FLAG_ANY is intentionally excluded from this map
		// because it's 0 and would always match in HasUsecases checks
		"FLAG_CHAT":                FLAG_CHAT,
		"FLAG_COMPLETION":          FLAG_COMPLETION,
		"FLAG_EDIT":                FLAG_EDIT,
		"FLAG_EMBEDDINGS":          FLAG_EMBEDDINGS,
		"FLAG_RERANK":              FLAG_RERANK,
		"FLAG_IMAGE":               FLAG_IMAGE,
		"FLAG_TRANSCRIPT":          FLAG_TRANSCRIPT,
		"FLAG_TTS":                 FLAG_TTS,
		"FLAG_SOUND_GENERATION":    FLAG_SOUND_GENERATION,
		"FLAG_TOKENIZE":            FLAG_TOKENIZE,
		"FLAG_VAD":                 FLAG_VAD,
		"FLAG_LLM":                 FLAG_LLM,
		"FLAG_VIDEO":               FLAG_VIDEO,
		"FLAG_DETECTION":           FLAG_DETECTION,
		"FLAG_VISION":              FLAG_VISION,
		"FLAG_FACE_RECOGNITION":    FLAG_FACE_RECOGNITION,
		"FLAG_SPEAKER_RECOGNITION": FLAG_SPEAKER_RECOGNITION,
		"FLAG_AUDIO_TRANSFORM":     FLAG_AUDIO_TRANSFORM,
		"FLAG_DIARIZATION":         FLAG_DIARIZATION,
		"FLAG_REALTIME_AUDIO":      FLAG_REALTIME_AUDIO,
		"FLAG_SCORE":               FLAG_SCORE,
	}
}

func stringToFlag(s string) string {
	return "FLAG_" + strings.ToUpper(s)
}

func GetUsecasesFromYAML(input []string) *ModelConfigUsecase {
	if len(input) == 0 {
		return nil
	}
	result := FLAG_ANY
	flags := GetAllModelConfigUsecases()
	for _, str := range input {
		for _, flag := range []string{stringToFlag(str), str} {
			f, exists := flags[flag]
			if exists {
				result |= f
			}
		}
	}
	return &result
}

// HasUsecases examines a ModelConfig and determines which endpoints have a chance of success.
//
// Declared known_usecases are normally additive — the guessing heuristic
// still adds whatever it can infer from backend/templates. The one
// exception is FLAG_SCORE: when the operator declared score, they
// reserved the model for the router classifier. Letting GuessUsecases
// paint chat/completion on top would surface it in chat pickers it was
// deliberately kept out of, and (on llama-cpp) reintroduce the slot
// contention the score/chat conflict check exists to prevent. So a
// declared score list is authoritative.
func (c *ModelConfig) HasUsecases(u ModelConfigUsecase) bool {
	if c.KnownUsecases != nil {
		if (u & *c.KnownUsecases) == u {
			return true
		}
		if (*c.KnownUsecases & FLAG_SCORE) == FLAG_SCORE {
			return false
		}
	}
	return c.GuessUsecases(u)
}

// GuessUsecases is a **heuristic based** function, as the backend in question may not be loaded yet, and the config may not record what it's useful at.
// In its current state, this function should ideally check for properties of the config like templates, rather than the direct backend name checks for the lower half.
// This avoids the maintenance burden of updating this list for each new backend - but unfortunately, that's the best option for some services currently.
func (c *ModelConfig) GuessUsecases(u ModelConfigUsecase) bool {
	// Backends that are clearly not text-generation
	nonTextGenBackends := []string{
		"whisper", "piper", "kokoro",
		"diffusers", "stablediffusion", "stablediffusion-ggml",
		"rerankers", "silero-vad", "rfdetr", "insightface", "speaker-recognition",
		"transformers-musicgen", "ace-step", "acestep-cpp",
	}

	if (u & FLAG_CHAT) == FLAG_CHAT {
		if c.TemplateConfig.Chat == "" && c.TemplateConfig.ChatMessage == "" && !c.TemplateConfig.UseTokenizerTemplate {
			return false
		}
		if slices.Contains(nonTextGenBackends, c.Backend) {
			return false
		}
		if c.Embeddings != nil && *c.Embeddings {
			return false
		}
	}
	if (u & FLAG_COMPLETION) == FLAG_COMPLETION {
		if c.TemplateConfig.Completion == "" {
			return false
		}
		if slices.Contains(nonTextGenBackends, c.Backend) {
			return false
		}
	}
	if (u & FLAG_EDIT) == FLAG_EDIT {
		if c.TemplateConfig.Edit == "" {
			return false
		}
	}
	if (u & FLAG_EMBEDDINGS) == FLAG_EMBEDDINGS {
		if c.Embeddings == nil || !*c.Embeddings {
			return false
		}
	}
	if (u & FLAG_IMAGE) == FLAG_IMAGE {
		imageBackends := []string{"diffusers", "stablediffusion", "stablediffusion-ggml"}
		if !slices.Contains(imageBackends, c.Backend) {
			return false
		}

		if c.Backend == "diffusers" && c.Diffusers.PipelineType == "" {
			return false
		}

	}
	if (u & FLAG_VIDEO) == FLAG_VIDEO {
		videoBackends := []string{"diffusers", "stablediffusion", "vllm-omni"}
		if !slices.Contains(videoBackends, c.Backend) {
			return false
		}

		if c.Backend == "diffusers" && c.Diffusers.PipelineType == "" {
			return false
		}

	}
	if (u & FLAG_RERANK) == FLAG_RERANK {
		if c.Backend != "rerankers" && (c.Reranking == nil || !*c.Reranking) {
			return false
		}
	}
	if (u & FLAG_TRANSCRIPT) == FLAG_TRANSCRIPT {
		if c.Backend != "whisper" {
			return false
		}
		// whisper models with vad_only option are VAD, not transcription
		if slices.Contains(c.Options, "vad_only") {
			return false
		}
	}
	if (u & FLAG_TTS) == FLAG_TTS {
		ttsBackends := []string{"piper", "transformers-musicgen", "kokoro"}
		if !slices.Contains(ttsBackends, c.Backend) {
			return false
		}
	}

	if (u & FLAG_DETECTION) == FLAG_DETECTION {
		detectionBackends := []string{"rfdetr", "sam3-cpp", "insightface"}
		if !slices.Contains(detectionBackends, c.Backend) {
			return false
		}
	}

	if (u & FLAG_FACE_RECOGNITION) == FLAG_FACE_RECOGNITION {
		faceBackends := []string{"insightface"}
		if !slices.Contains(faceBackends, c.Backend) {
			return false
		}
	}

	if (u & FLAG_SPEAKER_RECOGNITION) == FLAG_SPEAKER_RECOGNITION {
		speakerBackends := []string{"speaker-recognition"}
		if !slices.Contains(speakerBackends, c.Backend) {
			return false
		}
	}

	if (u & FLAG_AUDIO_TRANSFORM) == FLAG_AUDIO_TRANSFORM {
		audioTransformBackends := []string{"localvqe"}
		if !slices.Contains(audioTransformBackends, c.Backend) {
			return false
		}
	}

	if (u & FLAG_SOUND_GENERATION) == FLAG_SOUND_GENERATION {
		soundGenBackends := []string{"transformers-musicgen", "ace-step", "acestep-cpp", "mock-backend"}
		if !slices.Contains(soundGenBackends, c.Backend) {
			return false
		}
	}

	if (u & FLAG_TOKENIZE) == FLAG_TOKENIZE {
		tokenizeCapableBackends := []string{"llama.cpp", "rwkv"}
		if !slices.Contains(tokenizeCapableBackends, c.Backend) {
			return false
		}
	}

	if (u & FLAG_VAD) == FLAG_VAD {
		if c.Backend != "silero-vad" && c.Backend != "sherpa-onnx" && !(c.Backend == "whisper" && slices.Contains(c.Options, "vad_only")) {
			return false
		}
	}

	if (u & FLAG_DIARIZATION) == FLAG_DIARIZATION {
		// vibevoice-cpp emits speaker-labelled segments natively from its
		// ASR pass; sherpa-onnx pipes pyannote segmentation + speaker
		// embeddings + clustering. Both surface as a Diarize gRPC.
		diarizationBackends := []string{"vibevoice-cpp", "sherpa-onnx"}
		if !slices.Contains(diarizationBackends, c.Backend) {
			return false
		}
	}

	if (u & FLAG_REALTIME_AUDIO) == FLAG_REALTIME_AUDIO {
		// Backends that own a single any-to-any loop and implement
		// AudioToAudioStream — listed here so models without an explicit
		// known_usecases still surface on the Talk page.
		realtimeAudioBackends := []string{"liquid-audio"}
		if !slices.Contains(realtimeAudioBackends, c.Backend) {
			return false
		}
	}

	if (u & FLAG_SCORE) == FLAG_SCORE {
		// No heuristic: Score-intent is a deliberate operator choice
		// (it reserves the model from generation traffic on llama-cpp),
		// so HasUsecases(FLAG_SCORE) is true only when KnownUsecases
		// declares it explicitly.
		return false
	}

	return true
}

// BuildCogitoOptions generates cogito options from the model configuration
// It accepts a context, MCP sessions, and optional callback functions for status, reasoning, tool calls, and tool results
func (c *ModelConfig) BuildCogitoOptions() []cogito.Option {
	cogitoOpts := []cogito.Option{
		cogito.WithIterations(3),  // default to 3 iterations
		cogito.WithMaxAttempts(3), // default to 3 attempts
		cogito.WithForceReasoning(),
	}

	// Apply agent configuration options
	if c.Agent.EnableReasoning {
		cogitoOpts = append(cogitoOpts, cogito.WithForceReasoning())
	}

	if c.Agent.EnablePlanning {
		cogitoOpts = append(cogitoOpts, cogito.EnableAutoPlan)
	}

	if c.Agent.EnableMCPPrompts {
		cogitoOpts = append(cogitoOpts, cogito.EnableMCPPrompts)
	}

	if c.Agent.EnablePlanReEvaluator {
		cogitoOpts = append(cogitoOpts, cogito.EnableAutoPlanReEvaluator)
	}

	if c.Agent.MaxIterations != 0 {
		cogitoOpts = append(cogitoOpts, cogito.WithIterations(c.Agent.MaxIterations))
	}

	if c.Agent.MaxAttempts != 0 {
		cogitoOpts = append(cogitoOpts, cogito.WithMaxAttempts(c.Agent.MaxAttempts))
	}

	if c.Agent.DisableSinkState {
		cogitoOpts = append(cogitoOpts, cogito.DisableSinkState)
	}

	if c.Agent.LoopDetection != 0 {
		cogitoOpts = append(cogitoOpts, cogito.WithLoopDetection(c.Agent.LoopDetection))
	}

	if c.Agent.MaxAdjustmentAttempts != 0 {
		cogitoOpts = append(cogitoOpts, cogito.WithMaxAdjustmentAttempts(c.Agent.MaxAdjustmentAttempts))
	}

	if c.Agent.ForceReasoningTool {
		cogitoOpts = append(cogitoOpts, cogito.WithForceReasoningTool())
	}

	return cogitoOpts
}