"""
Development environment configuration for Aniworld application.

This module provides development-specific settings including debugging,
hot-reloading, and relaxed security for local development.

Environment Variables:
    JWT_SECRET_KEY: Secret key for JWT token signing (default: dev-secret)
    PASSWORD_SALT: Salt for password hashing (default: dev-salt)
    DATABASE_URL: Development database connection string (default: SQLite)
    LOG_LEVEL: Logging level (default: INFO)
    CORS_ORIGINS: Comma-separated list of allowed CORS origins
    API_RATE_LIMIT: API rate limit per minute (default: 1000)
"""

from typing import List

from pydantic import Field, validator
from pydantic_settings import BaseSettings


class DevelopmentSettings(BaseSettings):
    """Development environment configuration settings."""

    # ============================================================================
    # Security Settings (Relaxed for Development)
    # ============================================================================

    jwt_secret_key: str = Field(
        default="dev-secret-key-change-in-production",
        env="JWT_SECRET_KEY"
    )
    """JWT secret key (non-production value for development)."""

    password_salt: str = Field(
        default="dev-salt-change-in-production",
        env="PASSWORD_SALT"
    )
    """Password salt (non-production value for development)."""

    master_password_hash: str = Field(
        default="$2b$12$wP0KBVbJKVAb8CdSSXw0NeGTKCk"
        "bw4fSAFXIqR2/wDqPSEBn9w7lS",
        env="MASTER_PASSWORD_HASH"
    )
    """Hash of the master password (dev: 'password')."""

    master_password: str = Field(default="password", env="MASTER_PASSWORD")
    """Master password for development (NEVER use in production)."""

    allowed_hosts: List[str] = Field(
        default=["localhost", "127.0.0.1", "*"], env="ALLOWED_HOSTS"
    )
    """Allowed hosts (permissive for development)."""

    cors_origins: str = Field(default="*", env="CORS_ORIGINS")
    """CORS origins (allow all for development)."""

    # ============================================================================
    # Database Settings
    # ============================================================================

    database_url: str = Field(
        default="sqlite:///./data/aniworld_dev.db",
        env="DATABASE_URL"
    )
    """Development database URL (SQLite by default)."""

    database_pool_size: int = Field(default=5, env="DATABASE_POOL_SIZE")
    """Database connection pool size."""

    database_max_overflow: int = Field(default=10, env="DATABASE_MAX_OVERFLOW")
    """Maximum overflow connections for database pool."""

    database_pool_recycle: int = Field(
        default=3600, env="DATABASE_POOL_RECYCLE"
    )
    """Recycle database connections every N seconds."""

    # ============================================================================
    # API Settings
    # ============================================================================

    api_rate_limit: int = Field(default=1000, env="API_RATE_LIMIT")
    """API rate limit per minute (relaxed for development)."""

    api_timeout: int = Field(default=60, env="API_TIMEOUT")
    """API request timeout in seconds (longer for debugging)."""

    # ============================================================================
    # Logging Settings
    # ============================================================================

    log_level: str = Field(default="INFO", env="LOG_LEVEL")
    """Logging level (INFO for standard output)."""

    log_file: str = Field(default="logs/development.log", env="LOG_FILE")
    """Path to development log file."""

    log_rotation_size: int = Field(default=5_242_880, env="LOG_ROTATION_SIZE")
    """Log file rotation size in bytes (default: 5MB)."""

    log_retention_days: int = Field(default=7, env="LOG_RETENTION_DAYS")
    """Number of days to retain log files."""

    # ============================================================================
    # Performance Settings
    # ============================================================================

    workers: int = Field(default=1, env="WORKERS")
    """Number of Uvicorn worker processes (single for development)."""

    worker_timeout: int = Field(default=120, env="WORKER_TIMEOUT")
    """Worker timeout in seconds."""

    max_request_size: int = Field(default=104_857_600, env="MAX_REQUEST_SIZE")
    """Maximum request body size in bytes (default: 100MB)."""

    session_timeout_hours: int = Field(
        default=168, env="SESSION_TIMEOUT_HOURS"
    )
    """Session timeout in hours (longer for development)."""

    # ============================================================================
    # Provider Settings
    # ============================================================================

    default_provider: str = Field(
        default="aniworld.to", env="DEFAULT_PROVIDER"
    )
    """Default content provider."""

    provider_timeout: int = Field(default=60, env="PROVIDER_TIMEOUT")
    """Provider request timeout in seconds (longer for debugging)."""

    provider_retries: int = Field(default=1, env="PROVIDER_RETRIES")
    """Number of retry attempts for provider requests."""

    # ============================================================================
    # Download Settings
    # ============================================================================

    max_concurrent_downloads: int = Field(
        default=1, env="MAX_CONCURRENT_DOWNLOADS"
    )
    """Maximum concurrent downloads (limited for development)."""

    download_timeout: int = Field(default=7200, env="DOWNLOAD_TIMEOUT")
    """Download timeout in seconds (default: 2 hours)."""

    # ============================================================================
    # Application Paths
    # ============================================================================

    anime_directory: str = Field(
        default="/tmp/aniworld_dev", env="ANIME_DIRECTORY"
    )
    """Directory where anime is stored (development default)."""

    temp_directory: str = Field(
        default="/tmp/aniworld_dev/temp", env="TEMP_DIRECTORY"
    )
    """Temporary directory for downloads and cache."""

    # ============================================================================
    # Validators
    # ============================================================================

    @validator("log_level")
    @classmethod
    def validate_log_level(cls, v: str) -> str:
        """Validate log level is valid."""
        valid_levels = {"DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"}
        if v.upper() not in valid_levels:
            raise ValueError(
                f"Invalid log level '{v}'. Must be one of: {valid_levels}"
            )
        return v.upper()

    @validator("cors_origins")
    @classmethod
    def parse_cors_origins(cls, v: str) -> str:
        """Parse comma-separated CORS origins."""
        if not v:
            return "http://localhost,http://127.0.0.1"
        return v

    # ============================================================================
    # Configuration
    # ============================================================================

    class Config:
        """Pydantic config."""

        env_file = ".env.development"
        extra = "ignore"
        case_sensitive = False

    # ============================================================================
    # Properties
    # ============================================================================

    @property
    def parsed_cors_origins(self) -> List[str]:
        """Get parsed CORS origins as list."""
        if not self.cors_origins or self.cors_origins == "*":
            return ["*"]
        return [origin.strip() for origin in self.cors_origins.split(",")]

    @property
    def is_production(self) -> bool:
        """Check if running in production mode."""
        return False

    @property
    def debug_enabled(self) -> bool:
        """Check if debug mode is enabled."""
        return True

    @property
    def reload_enabled(self) -> bool:
        """Check if auto-reload is enabled."""
        return True


def get_development_settings() -> DevelopmentSettings:
    """
    Get development settings instance.

    This is a factory function that should be called when settings are needed.

    Returns:
        DevelopmentSettings instance configured from environment variables
    """
    return DevelopmentSettings()


# Export factory for backward compatibility
development_settings = DevelopmentSettings()