"""配置管理"""
import os
import yaml
from typing import Optional, List
from pydantic import BaseModel
from functools import lru_cache


class AppConfig(BaseModel):
    name: str = "job-crawler"
    version: str = "1.0.0"
    debug: bool = False


class TaskConfig(BaseModel):
    """单个任务配置"""
    id: str
    name: str = ""
    enabled: bool = True


class ApiConfig(BaseModel):
    base_url: str = "https://openapi.bazhuayu.com"
    username: str = ""
    password: str = ""
    batch_size: int = 100
    tasks: List[TaskConfig] = []


class KafkaConfig(BaseModel):
    bootstrap_servers: str = "localhost:9092"
    topic: str = "job_data"
    consumer_group: str = "job_consumer_group"


class CrawlerConfig(BaseModel):
    interval: int = 300
    filter_days: int = 7
    max_workers: int = 5
    max_expired_batches: int = 3  # 连续过期批次阈值
    auto_start: bool = True       # 容器启动时自动开始采集


class DatabaseConfig(BaseModel):
    path: str = "data/crawl_progress.db"


class Settings(BaseModel):
    """应用配置"""
    app: AppConfig = AppConfig()
    api: ApiConfig = ApiConfig()
    kafka: KafkaConfig = KafkaConfig()
    crawler: CrawlerConfig = CrawlerConfig()
    database: DatabaseConfig = DatabaseConfig()
    
    @classmethod
    def from_yaml(cls, config_path: str) -> "Settings":
        """从YAML文件加载配置"""
        if not os.path.exists(config_path):
            return cls()
        
        with open(config_path, 'r', encoding='utf-8') as f:
            data = yaml.safe_load(f) or {}
        
        # 解析tasks
        api_data = data.get('api', {})
        tasks_data = api_data.pop('tasks', [])
        tasks = [TaskConfig(**t) for t in tasks_data]
        api_config = ApiConfig(**api_data, tasks=tasks)
        
        return cls(
            app=AppConfig(**data.get('app', {})),
            api=api_config,
            kafka=KafkaConfig(**data.get('kafka', {})),
            crawler=CrawlerConfig(**data.get('crawler', {})),
            database=DatabaseConfig(**data.get('database', {}))
        )
    
    def get_enabled_tasks(self) -> List[TaskConfig]:
        """获取启用的任务列表"""
        return [t for t in self.api.tasks if t.enabled]


@lru_cache()
def get_settings() -> Settings:
    """获取配置"""
    config_path = os.environ.get("CONFIG_PATH", "config/config.yml")
    return Settings.from_yaml(config_path)


settings = get_settings()