"""
Configuration centralisée de l'application.

Toutes les variables d'environnement et paramètres sont centralisés ici.
"""

import os
from pathlib import Path
from typing import Optional
from pydantic import Field
from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    """Configuration de l'application Homelab Automation."""

    # === Chemins ===
    base_dir: Path = Field(default_factory=lambda: Path(__file__).resolve().parent.parent)
    logs_dir: Path = Field(default_factory=lambda: Path(os.environ.get("LOGS_DIR", "/logs")))
    
    @property
    def ansible_dir(self) -> Path:
        """Répertoire Ansible (relatif à base_dir.parent)"""
        return self.base_dir.parent / "ansible"
    
    @property
    def tasks_logs_dir(self) -> Path:
        """Répertoire des logs de tâches markdown"""
        return Path(os.environ.get("DIR_LOGS_TASKS", str(self.base_dir.parent / "tasks_logs")))
    
    @property
    def db_path(self) -> Path:
        """Chemin de la base de données SQLite"""
        return self.logs_dir / "homelab.db"

    # === SSH ===
    ssh_key_path: str = Field(
        default_factory=lambda: os.environ.get("SSH_KEY_PATH", str(Path.home() / ".ssh" / "id_rsa"))
    )
    ssh_user: str = Field(default_factory=lambda: os.environ.get("SSH_USER", "automation"))
    ssh_remote_user: str = Field(default_factory=lambda: os.environ.get("SSH_REMOTE_USER", "root"))

    # === API ===
    api_key: str = Field(default_factory=lambda: os.environ.get("API_KEY", "dev-key-12345"))
    api_title: str = "Homelab Automation Dashboard API"
    api_version: str = "1.0.0"
    api_description: str = "API REST moderne pour la gestion automatique d'homelab"

    # === JWT Authentication ===
    jwt_secret_key: str = Field(
        default_factory=lambda: os.environ.get("JWT_SECRET_KEY", "dev-secret-key-change-in-production")
    )
    jwt_expire_minutes: int = Field(
        default_factory=lambda: int(os.environ.get("JWT_EXPIRE_MINUTES", "1440"))
    )
    jwt_algorithm: str = "HS256"

    # === Database ===
    database_url: Optional[str] = Field(default=None)
    
    @property
    def async_database_url(self) -> str:
        """URL de connexion async pour SQLAlchemy"""
        if self.database_url:
            return self.database_url
        return f"sqlite+aiosqlite:///{self.db_path}"

    # === CORS ===
    cors_origins: list = Field(default=["*"])
    cors_allow_credentials: bool = True
    cors_allow_methods: list = Field(default=["*"])
    cors_allow_headers: list = Field(default=["*"])

    # === Notifications ntfy ===
    ntfy_enabled: bool = Field(
        default_factory=lambda: os.environ.get("NTFY_ENABLED", "true").lower() == "true"
    )
    ntfy_base_url: str = Field(
        default_factory=lambda: os.environ.get("NTFY_BASE_URL", "https://ntfy.sh")
    )
    ntfy_default_topic: str = Field(
        default_factory=lambda: os.environ.get("NTFY_TOPIC", "homelab-automation")
    )
    ntfy_timeout: int = Field(
        default_factory=lambda: int(os.environ.get("NTFY_TIMEOUT", "10"))
    )
    ntfy_username: Optional[str] = Field(
        default_factory=lambda: os.environ.get("NTFY_USERNAME")
    )
    ntfy_password: Optional[str] = Field(
        default_factory=lambda: os.environ.get("NTFY_PASSWORD")
    )
    ntfy_token: Optional[str] = Field(
        default_factory=lambda: os.environ.get("NTFY_TOKEN")
    )

    # === Scheduler ===
    scheduler_timezone: str = Field(
        default_factory=lambda: os.environ.get("SCHEDULER_TIMEZONE", "America/Montreal")
    )
    scheduler_misfire_grace_time: int = 300

    # === Cache ===
    hosts_cache_ttl: int = 60  # secondes
    inventory_cache_ttl: int = 60  # secondes
    logs_index_rebuild_interval: int = 60  # secondes

    # === Server ===
    host: str = "0.0.0.0"
    port: int = 8008
    reload: bool = Field(
        default_factory=lambda: os.environ.get("RELOAD", "true").lower() == "true"
    )
    log_level: str = "info"

    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"
        extra = "ignore"


# Instance singleton de la configuration
settings = Settings()