"""Application settings using Pydantic Settings."""

from pydantic import Field, SecretStr
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    """Runtime application configuration."""

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

    project_name: str = "Test Task CRM"
    version: str = "0.1.0"
    api_v1_prefix: str = "/api/v1"
    db_host: str = Field(default="localhost", description="Database hostname")
    db_port: int = Field(default=5432, description="Database port")
    db_name: str = Field(default="test_task_crm", description="Database name")
    db_user: str = Field(default="postgres", description="Database user")
    db_password: SecretStr = Field(
        default=SecretStr("postgres"), description="Database user password"
    )
    database_url_override: str | None = Field(
        default=None,
        alias="DATABASE_URL",
        description="Optional full SQLAlchemy URL override",
    )
    sqlalchemy_echo: bool = False
    jwt_secret_key: SecretStr = Field(default=SecretStr("change-me"))
    jwt_algorithm: str = "HS256"
    access_token_expire_minutes: int = 30
    refresh_token_expire_days: int = 7
    redis_enabled: bool = Field(default=False, description="Toggle Redis-backed cache usage")
    redis_url: str = Field(default="redis://localhost:6379/0", description="Redis connection URL")
    analytics_cache_ttl_seconds: int = Field(
        default=120, ge=1, description="TTL for cached analytics responses"
    )
    analytics_cache_backoff_ms: int = Field(
        default=200,
        ge=0,
        description="Maximum backoff (ms) for retrying cache writes/invalidation",
    )

    @property
    def database_url(self) -> str:
        if self.database_url_override:
            return self.database_url_override
        password = self.db_password.get_secret_value()
        return (
            f"postgresql+asyncpg://{self.db_user}:{password}@"
            f"{self.db_host}:{self.db_port}/{self.db_name}"
        )


settings = Settings()