"""v2.6 主入口 - FastAPI + Daemon ticker 共享 asyncio event loop"""

from __future__ import annotations

import asyncio
import logging
from contextlib import asynccontextmanager
from pathlib import Path
from typing import Optional

import yaml
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles

logger = logging.getLogger("moziplus-v2")

# ---------------------------------------------------------------------------
# 配置加载
# ---------------------------------------------------------------------------

DEFAULT_CONFIG_PATH = Path(__file__).parent.parent / "config" / "default.yaml"


def load_config() -> dict:
    """加载全局默认配置"""
    if DEFAULT_CONFIG_PATH.exists():
        with open(DEFAULT_CONFIG_PATH) as f:
            return yaml.safe_load(f) or {}
    return {}


config = load_config()

# ---------------------------------------------------------------------------
# Daemon ticker（占位，F6 实现）
# ---------------------------------------------------------------------------

_ticker_task: Optional[asyncio.Task] = None


async def _run_ticker():
    """Daemon ticker 主循环（占位）"""
    tick_interval = config.get("daemon", {}).get("tick_interval", 30)
    logger.info("Ticker started (interval=%ss)", tick_interval)
    while True:
        try:
            # F6 会在这里注入真正的 tick 逻辑
            await asyncio.sleep(tick_interval)
        except asyncio.CancelledError:
            logger.info("Ticker cancelled")
            return
        except Exception:
            logger.exception("Tick error")
            await asyncio.sleep(tick_interval)


# ---------------------------------------------------------------------------
# FastAPI 生命周期
# ---------------------------------------------------------------------------


@asynccontextmanager
async def lifespan(app: FastAPI):
    """启动 Daemon ticker，关闭时清理"""
    global _ticker_task
    logger.info("moziplus-v2 starting...")
    _ticker_task = asyncio.create_task(_run_ticker())
    yield
    if _ticker_task:
        _ticker_task.cancel()
        try:
            await _ticker_task
        except asyncio.CancelledError:
            pass
    logger.info("moziplus-v2 stopped")


# ---------------------------------------------------------------------------
# FastAPI app
# ---------------------------------------------------------------------------

app = FastAPI(
    title="Sanguo MoziPlus v2",
    description="AI Native DevOps Platform - Blackboard Architecture",
    version="2.6.0",
    lifespan=lifespan,
)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# ---------------------------------------------------------------------------
# API 路由注册
# ---------------------------------------------------------------------------

from src.api.blackboard_routes import router as blackboard_router
from src.api.daemon_routes import router as daemon_router
from src.api.project_routes import router as project_router
from src.api.sse_routes import router as sse_router

app.include_router(blackboard_router)
app.include_router(daemon_router)
app.include_router(project_router)
app.include_router(sse_router)

# ---------------------------------------------------------------------------
# 兼容端点
# ---------------------------------------------------------------------------


@app.get("/api/projects")
async def list_projects_compat():
    """兼容旧端点"""
    from src.api.project_routes import _registry
    reg = _registry()
    return {"projects": {pid: info for pid, info in reg.list_projects().items()
                         if info.get("status") != "archived"}}


# ---------------------------------------------------------------------------
# 静态文件服务（前端 dist/，F18 实现）
# ---------------------------------------------------------------------------

DIST_DIR = Path(__file__).parent / "frontend" / "dist"
if DIST_DIR.exists():
    app.mount("/", StaticFiles(directory=str(DIST_DIR), html=True), name="frontend")