"""应用配置：通过环境变量 / .env 读取。"""
from pathlib import Path

from pydantic_settings import BaseSettings, SettingsConfigDict

# 项目根目录（backend/ 的上一级）
PROJECT_ROOT = Path(__file__).resolve().parents[2]


class Settings(BaseSettings):
    model_config = SettingsConfigDict(
        env_file=str(PROJECT_ROOT / ".env"),
        env_file_encoding="utf-8",
        extra="ignore",
    )

    # Redis
    redis_url: str = "redis://localhost:6379/0"

    # 网关服务
    host: str = "0.0.0.0"
    port: int = 8000

    # 心跳保活参数（秒）
    heartbeat_scan_interval: int = 60
    agent_heartbeat_timeout: int = 120
    agent_heartbeat_expected: int = 10

    # 调度参数（秒）
    dispatch_interval: int = 2
    task_timeout_check_interval: int = 5

    # 任务默认超时（秒）
    default_task_timeout: int = 3600

    # 任务数据保留 TTL（秒）
    task_ttl: int = 86400

    # 日志级别
    log_level: str = "INFO"

    # 认证：CLI 提交任务 / Agent 注册时必须携带的密码
    gateway_auth: str = "dev-gateway-auth"

    # 分布式锁相关
    lock_timeout: int = 30

    # 最大并发调度轮次
    dispatch_batch_size: int = 20


settings = Settings()