import sys
import os
sys.path.insert(0, os.path.dirname(__file__))

from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import FileResponse
from contextlib import asynccontextmanager
import uvicorn
from starlette.staticfiles import StaticFiles

from app.database import init_db
from core.security import SECRET_KEY
from api import auth, topics, system, publishing, articles, logs, admin

@asynccontextmanager
async def lifespan(app: FastAPI):
    """应用生命周期管理"""
    print("正在初始化数据库...")
    init_db()
    print("数据库初始化完成")
    yield
    print("应用关闭")

app = FastAPI(
    title="宇之然内容创作平台 API",
    description="企业级内容创作管理系统",
    version="1.0.0",
    lifespan=lifespan
)

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

# API 路由（必须先于静态文件注册）
app.include_router(auth.router, prefix="/api/auth", tags=["认证"])
app.include_router(topics.router, prefix="/api/topics", tags=["选题管理"])
app.include_router(system.router, prefix="/api/system", tags=["系统状态"])
app.include_router(publishing.router, prefix="/api/publishing", tags=["文章发布"])
app.include_router(articles.router, prefix="/api/articles", tags=["文章预览"])
app.include_router(logs.router, prefix="/api/logs", tags=["日志系统"])
app.include_router(admin.router, prefix="/api/admin", tags=["管理员"])

# 健康检查
@app.get("/health")
async def health_check():
    return {"status": "healthy", "timestamp": __import__('datetime').datetime.now().isoformat()}

# 独立页面路由（必须在 SPA catch-all 之前）
@app.get("/topics.html")
async def topics_page():
    return FileResponse("static/topics.html")

@app.get("/logs.html")
async def logs_page():
    return FileResponse("static/logs.html")

@app.get("/users.html")
async def users_page():
    return FileResponse("static/users.html")

# 静态文件（不干扰API）
app.mount("/static", StaticFiles(directory="static"), name="static")

# SPA：所有非 API 路径返回 index.html（最后注册）
@app.get("/{full_path:path}")
async def serve_spa(full_path: str):
    return FileResponse("static/index.html")

@app.exception_handler(Exception)
async def global_exception_handler(request: Request, exc: Exception):
    import traceback
    print(f"全局异常: {exc}")
    print(f"堆栈跟踪:\n{traceback.format_exc()}")
    return {
        "error": "服务器内部错误",
        "message": str(exc),
        "path": request.url.path
    }

if __name__ == "__main__":
    uvicorn.run("main:app", host="0.0.0.0", port=8001, reload=True, log_level="info")