"""FlowDeck — Configuration via pydantic-settings."""
from __future__ import annotations

import os
from pathlib import Path

from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    @property
    def data_dir(self) -> str:
        """Racine des fichiers (avatars, uploads…).

        Pas un champ : la lecture est faite à chaque accès parce que les tests
        monkeypatchent `FLOWDECK_DATA_DIR` en cours de vie (A42 — les 9 copies
        de `Path(os.environ.get("FLOWDECK_DATA_DIR", "/data"))` vont ici).
        """
        return os.environ.get("FLOWDECK_DATA_DIR", "/data")
    model_config = SettingsConfigDict(
        env_file=".env", env_file_encoding="utf-8", extra="ignore"
    )

    # Gitea
    gitea_url: str = "https://git.dracodev.net"
    gitea_token: str = "change-me"
    gitea_oauth_client_id: str = "test-id"
    gitea_oauth_client_secret: str = "test-secret"
    gitea_webhook_secret: str = ""

    # GitHub
    github_oauth_client_id: str = ""
    github_oauth_client_secret: str = ""

    # OAuth2 — empty = dynamic per-request redirect URI (Host + X-Forwarded-*),
    # set this ONLY to pin an exact URI (must be registered in Gitea/GitHub)
    oauth_redirect_uri: str = ""

    # Webhook
    webhook_base_url: str = "http://localhost:8080"

    # App
    app_secret_key: str = "change-me-to-random"
    app_host: str = "0.0.0.0"
    app_port: int = 8080
    log_level: str = "INFO"
    default_lang: str = "fr"

    # Rate limiting
    rate_limit_enabled: bool = True
    rate_limit_requests: int = 60  # per minute

    # Public API v2 (v6.3.0)
    public_api_insecure_ok: bool = False  # if True, fd-public-key is accepted (dev only)
    api_v2_rate_limit_per_token: int = 300  # req/min per token for /api/v2

    # Database
    database_url: str = "sqlite:////data/flowdeck.db"

    # Sync
    sync_interval: int = 60
    gitea_cache_ttl: int = 30

    # Backup (v5.2.0) — scheduled daily snapshot of the SQLite file
    backup_enabled: bool = True
    backup_dir: str = "/data/backups"
    backup_interval_hours: int = 24
    backup_keep: int = 30

    # Forge projects sync (v5.2.0) — periodic refresh of `projects` table
    project_sync_enabled: bool = True
    project_sync_interval_hours: int = 1

    # Reminders (v5.8.0) — background scan for due date reminders
    reminders_enabled: bool = True
    reminder_scan_interval_seconds: int = 60

    # Webhooks outbound (v6.4.0) — retry of failed deliveries
    webhook_retry_enabled: bool = True
    webhook_retry_interval_seconds: int = 60

    # Email / SMTP notifications (v4.9.0) — optional. If smtp_host is empty,
    # email notifications are skipped (only in-app notifications are delivered).
    smtp_host: str = ""
    smtp_port: int = 587
    smtp_user: str = ""
    smtp_password: str = ""
    smtp_from: str = "FlowDeck <no-reply@flowdeck.local>"
    smtp_use_tls: bool = True
    app_base_url: str = "http://localhost:8080"

    # SSO / SAML + OIDC (v6.7.0) — bootstrap fallback ONLY: as soon as an admin
    # saves a configuration in Settings → Admin → SSO / Enterprise, the
    # `sso_config` table wins (see app/services/sso_provisioning.py).
    sso_provider: str = ""               # 'saml' | 'oidc' | '' (disabled)
    sso_name: str = "Company SSO"         # button label on the login page
    sso_entity_id: str = ""               # SAML: IdP entity id
    sso_sso_url: str = ""                 # SAML: IdP SSO URL (HTTP-Redirect)
    sso_slo_url: str = ""                 # SAML: IdP Single Logout URL
    sso_x509_certificate: str = ""        # SAML: IdP signing certificate (PEM)
    sso_issuer_url: str = ""              # OIDC: issuer identifier
    sso_client_id: str = ""               # OIDC: client id
    sso_client_secret: str = ""           # OIDC: client secret (env only)
    sso_scope: str = "openid profile email"
    sso_attribute_mapping: str = ""       # JSON, defaults per provider
    sso_groups_mapping: str = "[]"        # JSON [{sso_group, workspace_role, workspace_id}]
    sso_auto_provision: bool = True
    sso_only: bool = False                # refuse local login when true
    sso_sign_requests: bool = False       # sign AuthnRequest / LogoutRequest
    sso_default_workspace_id: int = 0

    # FlowDeck Agent (v4.10.0) — multi-LLM. Empty keys → offline/mock mode
    # (deterministic rule-based planner so the agent works without any API key).
    agent_enabled: bool = True
    llm_provider: str = "offline"      # any id from llm_client.PROVIDERS
                                       # (openai, anthropic, mistral, cohere,
                                       #  google, groq, deepseek, openrouter,
                                       #  nvidia, together, perplexity, xai,
                                       #  qwencloud, minimax, morph, fireworks,
                                       #  cerebras, sambanova, chutes, xiaomi,
                                       #  sealion, sensenova, ollama, offline)
    llm_model: str = "gpt-4o"
    llm_api_key: str = ""
    llm_api_base: str = ""             # custom base URL (Ollama, OpenRouter, ...)
    agent_max_iterations: int = 12
    agent_max_tokens_budget: int = 500000
    agent_run_timeout_seconds: int = 300

    @property
    def db_path(self) -> Path:
        if self.database_url == "sqlite:///:memory:":
            return Path(":memory:")  # Special SQLite in-memory
        if self.database_url.startswith("sqlite:///"):
            p = self.database_url.replace("sqlite:///", "", 1)
            # On Windows, don't prepend / if path starts with a drive letter
            import re
            if re.match(r'^[a-zA-Z]:', p):
                return Path(p)
            # A26 : `sqlite:////data/flowdeck.db` donne p='/data/…' — un simple
            # concat '/'+'/' → '//data/…' = chemin UNC sous Windows. On normalise.
            return Path("/" + p.lstrip("/"))
        return Path("/data/flowdeck.db")


settings = Settings()