"""
main.py
报告模板管理模块 FastAPI 应用入口。

启动：
    uvicorn main:app --host 0.0.0.0 --port 8100
或：
    python main.py
"""

from __future__ import annotations

import time
import uuid
from contextlib import asynccontextmanager

from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware

from config import settings
from database import init_database
from log import configure_logging, get_logger
from routers import template

# 在创建应用前完成日志配置
configure_logging()
logger = get_logger("app")
access_logger = get_logger("app.access")


@asynccontextmanager
async def lifespan(_app: FastAPI):
    logger.info("应用启动 | %s v%s", settings.APP_TITLE, settings.APP_VERSION)
    if settings.DB_AUTO_CREATE_TABLES:
        try:
            init_database()
        except Exception as e:  # noqa: BLE001
            logger.warning("启动建表失败（不影响已存在表的使用）: %s", e)
    yield
    logger.info("应用关闭")


app = FastAPI(
    title=settings.APP_TITLE,
    version=settings.APP_VERSION,
    description=settings.APP_DESCRIPTION,
    lifespan=lifespan,
)

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


@app.middleware("http")
async def log_requests(request: Request, call_next):
    if not settings.LOG_HTTP_ACCESS:
        return await call_next(request)

    req_id = uuid.uuid4().hex[:8]
    start = time.perf_counter()
    client = request.client.host if request.client else "-"
    access_logger.info("→ [%s] %s %s | client=%s", req_id, request.method, request.url.path, client)
    try:
        response = await call_next(request)
    except Exception:
        cost = (time.perf_counter() - start) * 1000
        access_logger.exception("✗ [%s] %s %s | %.1fms | 未处理异常", req_id, request.method, request.url.path, cost)
        raise
    cost = (time.perf_counter() - start) * 1000
    access_logger.info(
        "← [%s] %s %s | %s | %.1fms",
        req_id, request.method, request.url.path, response.status_code, cost,
    )
    response.headers["X-Request-ID"] = req_id
    return response


app.include_router(template.router)


@app.get("/health", tags=["健康检查"])
def health() -> dict:
    return {"status": "ok", "version": settings.APP_VERSION}


if __name__ == "__main__":
    import uvicorn

    # log_config=None：沿用本模块 configure_logging() 的配置，避免被 uvicorn 覆盖
    uvicorn.run(
        "main:app",
        host=settings.HOST,
        port=settings.PORT,
        reload=settings.RELOAD,
        log_config=None,
    )