"""Runtime configuration loaded from environment variables."""

from __future__ import annotations

import os
from dataclasses import dataclass

from dotenv import load_dotenv

load_dotenv()


def _bool_env(name: str, default: bool) -> bool:
    value = os.getenv(name)
    if value is None:
        return default
    return value.strip().lower() in {"1", "true", "yes", "y", "on"}


def _int_env(name: str, default: int) -> int:
    value = os.getenv(name)
    if value is None or not value.strip():
        return default
    try:
        return int(value)
    except ValueError:
        return default


def _float_env(name: str, default: float) -> float:
    value = os.getenv(name)
    if value is None or not value.strip():
        return default
    try:
        return float(value)
    except ValueError:
        return default


@dataclass(frozen=True)
class Settings:
    app_name: str = os.getenv("APP_NAME", "A Share Stock Data API")
    api_prefix: str = os.getenv("API_PREFIX", "/api/v1")
    api_key: str = os.getenv("STOCK_DATA_API_KEY", "")
    database_url: str = os.getenv("DATABASE_URL") or os.getenv("CACHE_DATABASE_URL") or "sqlite:///./.cache/stock_data_cache.db"
    database_ssl: bool = _bool_env("DATABASE_SSL", False)
    cache_enabled: bool = _bool_env("CACHE_ENABLED", True)
    cache_table_name: str = os.getenv("CACHE_TABLE_NAME", "api_cache")
    cache_schema_version: str = os.getenv("CACHE_SCHEMA_VERSION", "v1")
    source_timeout_seconds: int = _int_env("SOURCE_TIMEOUT_SECONDS", 15)
    source_retry_attempts: int = _int_env("SOURCE_RETRY_ATTEMPTS", 1)
    source_retry_backoff_seconds: float = _float_env("SOURCE_RETRY_BACKOFF_SECONDS", 0.5)
    source_retry_max_backoff_seconds: float = _float_env("SOURCE_RETRY_MAX_BACKOFF_SECONDS", 10.0)
    source_retry_jitter_seconds: float = _float_env("SOURCE_RETRY_JITTER_SECONDS", 0.25)
    suppress_source_output: bool = _bool_env("SUPPRESS_SOURCE_OUTPUT", True)
    disable_proxy_for_akshare: bool = _bool_env("DISABLE_PROXY_FOR_AKSHARE", True)
    search_api_base_url: str = os.getenv("SEARCH_API_BASE_URL", "https://jiuuij.de5.net/").strip()
    search_api_key: str = os.getenv("SEARCH_API_KEY", "").strip()
    search_api_model: str = os.getenv("SEARCH_API_MODEL", "grok-4.20-multi-agent-xhigh").strip()
    search_api_timeout_seconds: int = _int_env("SEARCH_API_TIMEOUT_SECONDS", 180)
    search_api_max_attempts: int = _int_env("SEARCH_API_MAX_ATTEMPTS", 8)
    search_api_temperature: float = _float_env("SEARCH_API_TEMPERATURE", 0.2)
    search_api_max_tokens: int = _int_env("SEARCH_API_MAX_TOKENS", 4096)
    search_cache_ttl_seconds: int = _int_env("SEARCH_CACHE_TTL_SECONDS", 3600)
    ai_search_hub_repo_path: str = os.getenv("AI_SEARCH_HUB_REPO_PATH", "").strip()
    ai_search_hub_timeout: int = _int_env("AI_SEARCH_HUB_TIMEOUT", 120)
    ai_search_hub_default_sites: str = os.getenv("AI_SEARCH_HUB_DEFAULT_SITES", "").strip()
    ai_search_hub_headless: bool = _bool_env("AI_SEARCH_HUB_HEADLESS", False)
    ai_search_hub_max_concurrent: int = _int_env("AI_SEARCH_HUB_MAX_CONCURRENT", 3)
    cors_origins: tuple[str, ...] = tuple(
        item.strip()
        for item in os.getenv("CORS_ORIGINS", "*").split(",")
        if item.strip()
    )
    # 源调用池配置 - 防止 HF Space worker pool 饱和
    max_concurrent_sources: int = _int_env("MAX_CONCURRENT_SOURCES", 2)  # HF Free tier: 2, Pro: 10
    source_pool_workers: int = _int_env("SOURCE_POOL_WORKERS", 4)  # 线程池大小


settings = Settings()