from functools import lru_cache

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

DEFAULT_MODEL_PROVIDER = "noop"


class Settings(BaseSettings):
    """Runtime settings loaded from environment variables and `.env`."""

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

    app_name: str = "Company AI Management Platform"
    app_env: str = "local"
    debug: bool = False
    api_prefix: str = "/api/v1"
    api_key: str | None = None
    cors_origins: list[str] = Field(default_factory=lambda: ["*"])

    database_url: str = "mysql+pymysql://root:password@127.0.0.1:3306/company_ai?charset=utf8mb4"
    legacy_database_url: str | None = None
    legacy_project_query: str | None = None
    legacy_project_code_prefix: str = "LEGACY"
    redis_url: str = "redis://127.0.0.1:6379/0"

    feishu_base_url: str = "https://open.feishu.cn/open-apis"
    feishu_app_id: str | None = None
    feishu_app_secret: str | None = None
    feishu_verification_token: str | None = None
    feishu_encrypt_key: str | None = None
    feishu_default_chat_id: str | None = None

    model_provider: str = DEFAULT_MODEL_PROVIDER
    openclaw_base_url: str = "http://127.0.0.1:2070"
    openclaw_http_url: str | None = None
    openclaw_ws_url: str | None = None
    openclaw_api_key: str | None = None
    openclaw_gateway_token: str | None = None
    hermes_base_url: str = "http://127.0.0.1:2073/v1"
    hermes_api_key: str | None = None
    hermes_model: str = "hermes-agent"
    hermes_session_id: str | None = None
    direct_llm_base_url: str = "https://api.openai.com/v1"
    direct_llm_api_key: str | None = None
    direct_llm_model: str = "gpt-4.1-mini"

    scheduler_enabled: bool = False
    daily_brief_cron_hour: int = 9
    daily_brief_cron_minute: int = 0
    weekly_project_report_day_of_week: str = "mon"
    weekly_project_report_cron_hour: int = 9
    weekly_project_report_cron_minute: int = 30

    @field_validator("cors_origins", mode="before")
    @classmethod
    def parse_cors_origins(cls, value: str | list[str]) -> list[str]:
        if isinstance(value, list):
            return value
        return [item.strip() for item in value.split(",") if item.strip()]


@lru_cache
def get_settings() -> Settings:
    """Return cached application settings."""

    return Settings()