from pathlib import Path
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    anthropic_api_key: str | None = None  # not used — claude CLI handles auth

    # Google OAuth — "Sign in with Google" for all users
    # Create credentials at console.cloud.google.com → APIs & Services → Credentials
    # Add https://<your-domain>/auth/google/callback as an authorised redirect URI
    google_client_id: str | None = None
    google_client_secret: str | None = None

    # Orchestrator (Gemini API — separate from Gemini CLI)
    # Get a key at: https://aistudio.google.com/apikey (free tier is sufficient)
    gemini_api_key: str | None = None
    orchestrator_model: str = "gemini-2.5-flash"    # model used for tool loop
    orchestrator_max_rounds: int = 10               # safety cap on tool iterations

    # DuckDuckGo search (used by orchestrator web_search tool)
    # Leave blank to use the free unauthenticated tier; set to your API key for higher limits
    ddg_api_key: str | None = None
    ddg_max_results: int = 5

    # Aether Platform API (used by orchestrator ae_journal_* and ae_task_list tools)
    ae_api_url: str = "https://dev-api.oneskyit.com"
    ae_api_key: str = ""          # x-aether-api-key header
    ae_account_id: str = ""       # x-account-id header
    ae_api_timeout: int = 15      # per-request timeout in seconds

    # Agent identity — used in prompts, session logs, and memory distillation
    # Override in .env for each instance (e.g. AGENT_NAME=Holly, USER_NAME=Holly)
    agent_name: str = "Inara"
    user_name: str = "Scott"

    home_dir: Path = Path("../home")
    sessions_dir: Path = Path("./data/sessions")
    default_model: str = "claude-sonnet-4-6"
    default_tier: int = 2
    max_history_messages: int = 40  # rolling window — 20 turns (user + assistant)
    primary_backend: str = "claude"  # "claude" or "gemini" — other is always fallback

    # Local model backend — OpenAI-compatible API (Open WebUI / Ollama)
    # Set LOCAL_API_URL in .env to enable; leave blank to disable
    local_api_url: str = ""            # e.g. http://192.168.32.19:3000
    local_api_key: str = ""            # sk-... from Open WebUI → Settings → Account → API Keys
    local_model: str = ""              # workspace or model name, e.g. test-agent-simple

    # Per-backend timeouts in seconds
    timeout_claude: int = 60
    timeout_gemini: int = 120   # frequently slow under load
    timeout_local: int = 300    # local models may need to load first

    # Auto-distillation schedule — override in .env
    # AUTO_DISTILL=false disables entirely
    scheduler_timezone: str = "America/New_York"  # IANA tz — override in .env if needed
    auto_distill: bool = True
    auto_distill_short: bool = True   # daily at 03:00 — rolls session logs → MEMORY_SHORT
    auto_distill_mid: bool = True     # weekly Sunday at 03:30 — LLM summarizes short → mid
    auto_distill_long: bool = False   # monthly 1st at 04:00 — off by default (manual review recommended)

    # Which backend to use for distillation LLM calls.
    # "" = use primary_backend (default); "local" = use local model (saves API credits).
    # "long" stays on default (claude/gemini) for best quality.
    distill_backend_mid: str = ""
    distill_backend_long: str = ""

    # Model registry: default backend type per role when user registry has no entry.
    # Values: "claude_cli" | "gemini_cli" | "gemini_api" (builtin IDs)
    # Override in .env: ROLE_CHAT=claude_cli  ROLE_DISTILL=gemini_api  etc.
    role_chat: str = "claude_cli"
    role_orchestrator: str = "gemini_api"
    role_distill: str = "claude_cli"
    role_coder: str = "claude_cli"
    role_research: str = "gemini_api"

    # Comma-separated list of standard roles shown in the model settings UI.
    # Add custom roles here to extend the UI without code changes.
    # Example: DEFINED_ROLES=chat,orchestrator,distill,coder,research,medical
    defined_roles: str = "chat,orchestrator,distill,coder,research"

    # Memory tier token budgets — soft caps used during distillation
    # Override in .env: MEMORY_BUDGET_LONG=4000 etc.
    memory_budget_long: int = 2000
    memory_budget_mid: int = 2000
    memory_budget_short: int = 3000

    # Session auth
    jwt_secret: str = "change-me-in-dotenv"   # override in .env: JWT_SECRET=<random>
    jwt_expire_days: int = 30

    # SMTP — for sending invite emails
    smtp_server: str = ""
    smtp_port: int = 465
    smtp_username: str = ""
    smtp_password: str = ""
    smtp_from_email: str = "noreply@oneskyit.com"
    smtp_from_name: str = "Cortex"
    # Base URL used in invite links (no trailing slash)
    cortex_base_url: str = "https://cortex.dgrzone.com"

    host: str = "0.0.0.0"
    port: int = 8000

    model_config = SettingsConfigDict(env_file=".env", env_file_encoding="utf-8", extra="ignore")

    def get_defined_roles(self) -> list[str]:
        """Return the ordered list of standard roles from the defined_roles setting."""
        return [r.strip() for r in self.defined_roles.split(",") if r.strip()]

    def get_role_default(self, role: str) -> str:
        """Return the .env default backend type for a role (e.g. 'claude_cli')."""
        return getattr(self, f"role_{role.replace('-', '_')}", "claude_cli")

    def home_root(self) -> Path:
        """Resolve home_dir relative to this file's location if not absolute."""
        if self.home_dir.is_absolute():
            return self.home_dir
        return (Path(__file__).parent / self.home_dir).resolve()

    def sessions_path(self) -> Path:
        """Resolve sessions_dir relative to this file's location if not absolute."""
        if self.sessions_dir.is_absolute():
            return self.sessions_dir
        return (Path(__file__).parent / self.sessions_dir).resolve()


settings = Settings()