from pathlib import Path

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


class Settings(BaseSettings):
    model_config = SettingsConfigDict(env_file=".env", extra="ignore")

    telegram_bot_token: SecretStr
    deepseek_api_key: SecretStr
    deepseek_base_url: str = "https://api.deepseek.com"
    deepseek_model: str = "deepseek-chat"
    database_url: str
    repository_url: str = ""
    repository_branch: str = "main"
    repository_access_token: SecretStr | None = None
    owner_telegram_id: int
    project_group_id: int
    bot_timezone: str = "Europe/Paris"
    log_level: str = "INFO"
    repository_path: Path = Path("data/repository")
    max_repository_file_bytes: int = 250_000
    max_attachment_bytes: int = 5_000_000
    context_token_limit: int = 12_000
    summary_trigger_tokens: int = 9_000
    proactive_confidence_threshold: float = Field(default=0.86, ge=0, le=1)
    proactive_cooldown_seconds: int = 120

    @field_validator("repository_path", mode="before")
    @classmethod
    def expand_repository_path(cls, value: str | Path) -> Path:
        return Path(value).resolve()

    @property
    def sync_database_url(self) -> str:
        return self.database_url.replace("+asyncpg", "")