"""Tests for ``specify integration`` subcommand (list, install, uninstall, switch)."""

import json
import os

from typer.testing import CliRunner

from specify_cli import app


runner = CliRunner()


def _init_project(tmp_path, integration="copilot"):
    """Helper: init a spec-kit project with the given integration."""
    project = tmp_path / "proj"
    project.mkdir()
    old_cwd = os.getcwd()
    try:
        os.chdir(project)
        result = runner.invoke(app, [
            "init", "--here",
            "--integration", integration,
            "--script", "sh",
            "--no-git",
            "--ignore-agent-tools",
        ], catch_exceptions=False)
    finally:
        os.chdir(old_cwd)
    assert result.exit_code == 0, f"init failed: {result.output}"
    return project


# ── list ─────────────────────────────────────────────────────────────


class TestIntegrationList:
    def test_list_requires_speckit_project(self, tmp_path):
        old_cwd = os.getcwd()
        try:
            os.chdir(tmp_path)
            result = runner.invoke(app, ["integration", "list"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code != 0
        assert "Not a spec-kit project" in result.output

    def test_list_shows_installed(self, tmp_path):
        project = _init_project(tmp_path, "copilot")
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, ["integration", "list"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0
        assert "copilot" in result.output
        assert "installed" in result.output

    def test_list_shows_available_integrations(self, tmp_path):
        project = _init_project(tmp_path, "copilot")
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, ["integration", "list"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0
        # Should show multiple integrations
        assert "claude" in result.output
        assert "gemini" in result.output


# ── install ──────────────────────────────────────────────────────────


class TestIntegrationInstall:
    def test_install_requires_speckit_project(self, tmp_path):
        old_cwd = os.getcwd()
        try:
            os.chdir(tmp_path)
            result = runner.invoke(app, ["integration", "install", "claude"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code != 0
        assert "Not a spec-kit project" in result.output

    def test_install_unknown_integration(self, tmp_path):
        project = _init_project(tmp_path)
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, ["integration", "install", "nonexistent"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code != 0
        assert "Unknown integration" in result.output

    def test_install_already_installed(self, tmp_path):
        project = _init_project(tmp_path, "copilot")
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, ["integration", "install", "copilot"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0
        assert "already installed" in result.output
        assert "uninstall" in result.output

    def test_install_different_when_one_exists(self, tmp_path):
        project = _init_project(tmp_path, "copilot")
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, ["integration", "install", "claude"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code != 0
        assert "already installed" in result.output
        assert "uninstall" in result.output

    def test_install_into_bare_project(self, tmp_path):
        """Install into a project with .specify/ but no integration."""
        project = tmp_path / "bare"
        project.mkdir()
        (project / ".specify").mkdir()
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, [
                "integration", "install", "claude",
                "--script", "sh",
            ], catch_exceptions=False)
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0, result.output
        assert "installed successfully" in result.output

        # integration.json written
        data = json.loads((project / ".specify" / "integration.json").read_text(encoding="utf-8"))
        assert data["integration"] == "claude"

        # Manifest created
        assert (project / ".specify" / "integrations" / "claude.manifest.json").exists()

        # Claude uses skills directory (not commands)
        assert (project / ".claude" / "skills" / "speckit-plan" / "SKILL.md").exists()

    def test_install_bare_project_gets_shared_infra(self, tmp_path):
        """Installing into a bare project should create shared scripts and templates."""
        project = tmp_path / "bare"
        project.mkdir()
        (project / ".specify").mkdir()
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, [
                "integration", "install", "claude",
                "--script", "sh",
            ], catch_exceptions=False)
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0, result.output

        # Shared infrastructure should be present
        assert (project / ".specify" / "scripts").is_dir()
        assert (project / ".specify" / "templates").is_dir()


# ── uninstall ────────────────────────────────────────────────────────


class TestIntegrationUninstall:
    def test_uninstall_requires_speckit_project(self, tmp_path):
        old_cwd = os.getcwd()
        try:
            os.chdir(tmp_path)
            result = runner.invoke(app, ["integration", "uninstall"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code != 0
        assert "Not a spec-kit project" in result.output

    def test_uninstall_no_integration(self, tmp_path):
        project = tmp_path / "proj"
        project.mkdir()
        (project / ".specify").mkdir()
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, ["integration", "uninstall"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0
        assert "No integration" in result.output

    def test_uninstall_removes_files(self, tmp_path):
        project = _init_project(tmp_path, "claude")
        # Claude uses skills directory
        assert (project / ".claude" / "skills" / "speckit-plan" / "SKILL.md").exists()
        assert (project / ".specify" / "integrations" / "claude.manifest.json").exists()

        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, ["integration", "uninstall"], catch_exceptions=False)
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0
        assert "uninstalled" in result.output

        # Command files removed
        assert not (project / ".claude" / "skills" / "speckit-plan" / "SKILL.md").exists()

        # Manifest removed
        assert not (project / ".specify" / "integrations" / "claude.manifest.json").exists()

        # integration.json removed
        assert not (project / ".specify" / "integration.json").exists()

    def test_uninstall_preserves_modified_files(self, tmp_path):
        """Full lifecycle: install → modify → uninstall → modified file kept."""
        project = _init_project(tmp_path, "claude")
        plan_file = project / ".claude" / "skills" / "speckit-plan" / "SKILL.md"
        assert plan_file.exists()

        # Modify a file
        plan_file.write_text("# My custom plan command\n", encoding="utf-8")

        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, ["integration", "uninstall"], catch_exceptions=False)
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0
        assert "preserved" in result.output

        # Modified file kept
        assert plan_file.exists()
        assert plan_file.read_text(encoding="utf-8") == "# My custom plan command\n"

    def test_uninstall_wrong_key(self, tmp_path):
        project = _init_project(tmp_path, "copilot")
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, ["integration", "uninstall", "claude"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code != 0
        assert "not the currently installed" in result.output

    def test_uninstall_preserves_shared_infra(self, tmp_path):
        """Shared scripts and templates are not removed by integration uninstall."""
        project = _init_project(tmp_path, "claude")
        shared_script = project / ".specify" / "scripts" / "bash" / "common.sh"
        assert shared_script.exists()

        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, ["integration", "uninstall"], catch_exceptions=False)
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0

        # Shared infrastructure preserved
        assert shared_script.exists()
        assert (project / ".specify" / "templates").is_dir()


# ── switch ───────────────────────────────────────────────────────────


class TestIntegrationSwitch:
    def test_switch_requires_speckit_project(self, tmp_path):
        old_cwd = os.getcwd()
        try:
            os.chdir(tmp_path)
            result = runner.invoke(app, ["integration", "switch", "claude"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code != 0
        assert "Not a spec-kit project" in result.output

    def test_switch_unknown_target(self, tmp_path):
        project = _init_project(tmp_path)
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, ["integration", "switch", "nonexistent"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code != 0
        assert "Unknown integration" in result.output

    def test_switch_same_noop(self, tmp_path):
        project = _init_project(tmp_path, "copilot")
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, ["integration", "switch", "copilot"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0
        assert "already installed" in result.output

    def test_switch_between_integrations(self, tmp_path):
        project = _init_project(tmp_path, "claude")
        # Verify claude files exist (claude uses skills)
        assert (project / ".claude" / "skills" / "speckit-plan" / "SKILL.md").exists()

        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, [
                "integration", "switch", "copilot",
                "--script", "sh",
            ], catch_exceptions=False)
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0, result.output
        assert "Switched to" in result.output

        # Old claude files removed
        assert not (project / ".claude" / "skills" / "speckit-plan" / "SKILL.md").exists()

        # New copilot files created
        assert (project / ".github" / "agents" / "speckit.plan.agent.md").exists()

        # integration.json updated
        data = json.loads((project / ".specify" / "integration.json").read_text(encoding="utf-8"))
        assert data["integration"] == "copilot"

    def test_switch_preserves_shared_infra(self, tmp_path):
        """Switching preserves shared scripts, templates, and memory."""
        project = _init_project(tmp_path, "claude")
        shared_script = project / ".specify" / "scripts" / "bash" / "common.sh"
        assert shared_script.exists()
        shared_content = shared_script.read_text(encoding="utf-8")

        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, [
                "integration", "switch", "copilot",
                "--script", "sh",
            ], catch_exceptions=False)
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0

        # Shared infra untouched
        assert shared_script.exists()
        assert shared_script.read_text(encoding="utf-8") == shared_content

    def test_switch_from_nothing(self, tmp_path):
        """Switch when no integration is installed should just install the target."""
        project = tmp_path / "bare"
        project.mkdir()
        (project / ".specify").mkdir()
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, [
                "integration", "switch", "claude",
                "--script", "sh",
            ], catch_exceptions=False)
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0
        assert "Switched to" in result.output

        data = json.loads((project / ".specify" / "integration.json").read_text(encoding="utf-8"))
        assert data["integration"] == "claude"


# ── Full lifecycle ───────────────────────────────────────────────────


class TestIntegrationLifecycle:
    def test_install_modify_uninstall_preserves_modified(self, tmp_path):
        """Full lifecycle: install → modify file → uninstall → verify modified file kept."""
        project = tmp_path / "lifecycle"
        project.mkdir()
        (project / ".specify").mkdir()

        old_cwd = os.getcwd()
        try:
            os.chdir(project)

            # Install
            result = runner.invoke(app, [
                "integration", "install", "claude",
                "--script", "sh",
            ], catch_exceptions=False)
            assert result.exit_code == 0
            assert "installed successfully" in result.output

            # Claude uses skills directory
            plan_file = project / ".claude" / "skills" / "speckit-plan" / "SKILL.md"
            assert plan_file.exists()

            # Modify one file
            plan_file.write_text("# user customization\n", encoding="utf-8")

            # Uninstall
            result = runner.invoke(app, ["integration", "uninstall"], catch_exceptions=False)
            assert result.exit_code == 0
            assert "preserved" in result.output

            # Modified file kept
            assert plan_file.exists()
            assert plan_file.read_text(encoding="utf-8") == "# user customization\n"
        finally:
            os.chdir(old_cwd)


# ── Edge-case fixes ─────────────────────────────────────────────────


class TestScriptTypeValidation:
    def test_invalid_script_type_rejected(self, tmp_path):
        """--script with an invalid value should fail with a clear error."""
        project = tmp_path / "proj"
        project.mkdir()
        (project / ".specify").mkdir()
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, [
                "integration", "install", "claude",
                "--script", "bash",
            ])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code != 0
        assert "Invalid script type" in result.output

    def test_valid_script_types_accepted(self, tmp_path):
        """Both 'sh' and 'ps' should be accepted."""
        project = tmp_path / "proj"
        project.mkdir()
        (project / ".specify").mkdir()
        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, [
                "integration", "install", "claude",
                "--script", "sh",
            ], catch_exceptions=False)
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0


class TestParseIntegrationOptionsEqualsForm:
    def test_equals_form_parsed(self):
        """--commands-dir=./x should be parsed the same as --commands-dir ./x."""
        from specify_cli import _parse_integration_options
        from specify_cli.integrations import get_integration

        integration = get_integration("generic")
        assert integration is not None

        result_space = _parse_integration_options(integration, "--commands-dir ./mydir")
        result_equals = _parse_integration_options(integration, "--commands-dir=./mydir")
        assert result_space is not None
        assert result_equals is not None
        assert result_space["commands_dir"] == "./mydir"
        assert result_equals["commands_dir"] == "./mydir"


class TestUninstallNoManifestClearsInitOptions:
    def test_init_options_cleared_on_no_manifest_uninstall(self, tmp_path):
        """When no manifest exists, uninstall should still clear init-options.json."""
        project = tmp_path / "proj"
        project.mkdir()
        (project / ".specify").mkdir()

        # Write integration.json and init-options.json without a manifest
        int_json = project / ".specify" / "integration.json"
        int_json.write_text(json.dumps({"integration": "claude"}), encoding="utf-8")

        opts_json = project / ".specify" / "init-options.json"
        opts_json.write_text(json.dumps({
            "integration": "claude",
            "ai": "claude",
            "ai_skills": True,
            "script": "sh",
        }), encoding="utf-8")

        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            result = runner.invoke(app, ["integration", "uninstall", "claude"])
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0

        # init-options.json should have integration keys cleared
        opts = json.loads(opts_json.read_text(encoding="utf-8"))
        assert "integration" not in opts
        assert "ai" not in opts
        assert "ai_skills" not in opts
        # Non-integration keys preserved
        assert opts.get("script") == "sh"


class TestSwitchClearsMetadataAfterTeardown:
    def test_metadata_cleared_between_phases(self, tmp_path):
        """After a successful switch, metadata should reference the new integration."""
        project = _init_project(tmp_path, "claude")

        # Verify initial state
        int_json = project / ".specify" / "integration.json"
        assert json.loads(int_json.read_text(encoding="utf-8"))["integration"] == "claude"

        old_cwd = os.getcwd()
        try:
            os.chdir(project)
            # Switch to copilot — should succeed and update metadata
            result = runner.invoke(app, [
                "integration", "switch", "copilot",
                "--script", "sh",
            ], catch_exceptions=False)
        finally:
            os.chdir(old_cwd)
        assert result.exit_code == 0

        # integration.json should reference copilot, not claude
        data = json.loads(int_json.read_text(encoding="utf-8"))
        assert data["integration"] == "copilot"

        # init-options.json should reference copilot
        opts_json = project / ".specify" / "init-options.json"
        opts = json.loads(opts_json.read_text(encoding="utf-8"))
        assert opts.get("ai") == "copilot"