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package main

import (
	"context"
	"log"
	"net/http"
	"os"
	"path/filepath"

	"fastfileviewer/backend/internal/config"
	"fastfileviewer/backend/internal/db"
	"fastfileviewer/backend/internal/handlers"
	"fastfileviewer/backend/internal/middleware"
	"fastfileviewer/backend/internal/services"
	"github.com/gin-gonic/gin"
)

func main() {
	cfg := config.Load()
	if cfg.AutoPassword {
		log.Printf("ADMIN_PASSWORD 未设置,已自动生成临时密码: %s", cfg.AdminPassword)
	}

	if err := os.MkdirAll(cfg.RootDir, 0o755); err != nil {
		log.Fatalf("create root dir failed: %v", err)
	}

	database, err := db.New(cfg.DBPath)
	if err != nil {
		log.Fatalf("db init failed: %v", err)
	}

	fsSvc := services.NewFSService(cfg.RootDir)
	taskSvc := services.NewTaskService(database, fsSvc, cfg.MaxWorkers)
	taskSvc.Start(context.Background())

	authHandler := handlers.NewAuthHandler(cfg)
	fileHandler := handlers.NewFileHandler(fsSvc)
	taskHandler := handlers.NewTaskHandler(taskSvc)

	router := gin.Default()
	router.GET("/healthz", func(ctx *gin.Context) {
		ctx.JSON(http.StatusOK, gin.H{"ok": true})
	})
	router.POST("/api/login", authHandler.Login)

	api := router.Group("/api")
	api.Use(middleware.AuthRequired(cfg.JWTSecret))
	{
		api.GET("/fs/list", fileHandler.List)
		api.POST("/fs/upload", fileHandler.Upload)
		api.POST("/fs/move", fileHandler.Move)
		api.POST("/fs/rename", fileHandler.Rename)
		api.POST("/fs/delete", fileHandler.Delete)
		api.GET("/fs/download", fileHandler.Download)

		api.POST("/tasks/download", taskHandler.CreateDownload)
		api.POST("/tasks/extract", taskHandler.CreateExtract)
		api.GET("/tasks", taskHandler.List)
		api.GET("/tasks/:id", taskHandler.Get)
		api.GET("/tasks/:id/stream", taskHandler.Stream)
	}

	frontendDist := filepath.Join("/app", "web", "dist")
	if _, err := os.Stat(frontendDist); err != nil {
		frontendDist = filepath.Join("web", "dist")
	}
	if _, err := os.Stat(frontendDist); err == nil {
		router.Static("/assets", filepath.Join(frontendDist, "assets"))
		router.NoRoute(func(ctx *gin.Context) {
			ctx.File(filepath.Join(frontendDist, "index.html"))
		})
	} else {
		log.Printf("frontend dist not found, only API routes are available")
	}

	log.Printf("server listening on :%s", cfg.Port)
	log.Printf("storage root: %s", cfg.RootDir)
	if err := router.Run(":" + cfg.Port); err != nil {
		log.Fatalf("server failed: %v", err)
	}
}