# --- main.py ---
import os
from fastapi import FastAPI
from fastapi.staticfiles import StaticFiles
from fastapi.responses import HTMLResponse
from contextlib import asynccontextmanager
from starlette.middleware.base import BaseHTTPMiddleware # 🌟 新增引入
import database

# 引入我們剛剛拆分出來的路由模組
from routers import query, config, terminal, lock, leaf_options, backup, diagnostics, auth

@asynccontextmanager
async def lifespan(app: FastAPI):
    # Startup
    await database.init_db_pool()
    yield
    # Shutdown
    await database.close_db_pool()

app = FastAPI(title="Harmonic CMTS Manager", version="2.0", lifespan=lifespan)

# 🌟 新增：全域安全與快取 Middleware
class SecurityAndCacheMiddleware(BaseHTTPMiddleware):
    async def dispatch(self, request, call_next):
        response = await call_next(request)
        
        # 1. 補上安全性標頭 (圖片 7 的警告)
        response.headers["X-Content-Type-Options"] = "nosniff"
        
        # 2. 針對靜態檔案補上 Cache-Control (圖片 2 的警告)
        # 讓 JS/CSS 快取 1 小時 (3600秒)，提升前端載入效能
        if request.url.path.startswith("/static/"):
            response.headers["Cache-Control"] = "public, max-age=3600"
        else:
            # API 請求不快取，確保拿到最新資料
            response.headers["Cache-Control"] = "no-store"
            
        return response

app.add_middleware(SecurityAndCacheMiddleware) # 🌟 掛載 Middleware

# 掛載靜態檔案目錄 (對應 static/style.css 與 static/app.js)
app.mount("/static", StaticFiles(directory="static"), name="static")

# 🌟 統一標準：所有 REST API 都在這裡掛載 /api/v1 前綴
app.include_router(query.router, prefix="/api/v1")
app.include_router(config.router, prefix="/api/v1")
app.include_router(leaf_options.router, prefix="/api/v1")
app.include_router(lock.router, prefix="/api/v1")
app.include_router(backup.router, prefix="/api/v1")
app.include_router(diagnostics.router, prefix="/api/v1")
app.include_router(auth.router, prefix="/api/v1")

# WebSocket 通常獨立於 API 版本之外，所以不加前綴
app.include_router(terminal.router) 

# 根目錄路由：回傳前端 UI
@app.get("/", response_class=HTMLResponse, tags=["UI"])
async def read_root():
    # 讀取同層級的 index.html
    html_path = os.path.join(os.path.dirname(__file__), "index.html")
    with open(html_path, "r", encoding="utf-8") as f:
        return f.read()

if __name__ == "__main__":
    import uvicorn
    # 啟動伺服器
    uvicorn.run("main:app", host="0.0.0.0", port=8001, reload=True)