package main

import (
	"context"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"u-desk/internal/agent/config"
	agentmw "u-desk/internal/agent/middleware"
	"u-desk/internal/agent/handler"
	"u-desk/internal/filesystem"

	"github.com/labstack/echo/v4"
	"github.com/labstack/echo/v4/middleware"
)

func main() {
	cfg, err := config.Load("configs/agent.yaml")
	if err != nil {
		log.Fatalf("[FATAL] 加载配置失败: %v", err)
	}

	fsConfig := filesystem.DefaultConfig()
	fsSvc, err := filesystem.NewFileSystemService(fsConfig)
	if err != nil {
		log.Fatalf("[FATAL] 初始化文件服务失败: %v", err)
	}

	e := echo.New()
	e.HideBanner = true
	e.HidePort = true

	e.Use(middleware.Recover())
	e.Use(middleware.Logger())
	e.Use(middleware.CORSWithConfig(middleware.CORSConfig{
		AllowOrigins: cfg.CORS.AllowedOrigins,
		AllowMethods: []string{echo.GET, echo.PUT, echo.POST, echo.DELETE, echo.PATCH, echo.OPTIONS},
		AllowHeaders: []string{echo.HeaderOrigin, echo.HeaderContentType, echo.HeaderAuthorization, echo.HeaderAccept},
	}))
	if cfg.Auth.Token != "" {
		e.Use(agentmw.Auth(cfg.Auth.Token))
	}

	h := handler.New(fsSvc, cfg)

	api := e.Group("/api/v1")
	{
		api.GET("/ping", h.Ping)
		api.GET("/info", h.Info)

		// 文件操作 — 所有通过 ?path= 参数传递路径
		api.GET("/fs", h.ListOrStat)           // ?path=xxx [&action=stat]
		api.GET("/fs/read", h.ReadFile)         // ?path=xxx
		api.PUT("/fs/write", h.WriteFile)        // ?path=xxx & body={content}
		api.POST("/fs/create", h.Create)          // ?path=xxx & body={type,name}
		api.DELETE("/fs/delete", h.Delete)       // ?path=xxx
		api.PATCH("/fs/rename", h.Rename)        // ?path=xxx & body={new_path}
		api.POST("/fs/upload", h.Upload)         // ?path=xxx & body={content}
		api.GET("/fs/detect", h.DetectType)      // ?path=xxx

		sys := api.Group("/system")
		{
			sys.GET("/common-paths", h.CommonPaths)
			sys.GET("/drives", h.Drives)
			sys.GET("/stats", h.Stats)
		}

		proxy := api.Group("/proxy")
		{
			proxy.GET("/localfs/*", h.FileServerProxy)
			proxy.GET("/html-preview", h.HTMLPreviewProxy)
		}
	}

	addr := fmt.Sprintf("%s:%d", cfg.Server.Host, cfg.Server.Port)
	go func() {
		log.Printf("[INFO] u-fs-agent 启动于 %s", addr)
		if err := e.Start(addr); err != nil && err != http.ErrServerClosed {
			log.Fatalf("[FATAL] HTTP 服务器错误: %v", err)
		}
	}()

	go func() {
		if _, err := filesystem.StartLocalFileServer(); err != nil {
			log.Printf("[WARN] 文件服务器启动失败（媒体预览不可用）: %v", err)
		}
	}()

	quit := make(chan os.Signal, 1)
	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
	<-quit
	log.Println("[INFO] 正在关闭...")

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	filesystem.ShutdownLocalFileServer()
	e.Shutdown(ctx)
	fsSvc.Close(ctx)
	log.Println("[INFO] 已关闭")
}