package main

import (
	_ "file-system/docs" // Import generated docs
	"file-system/internal/api/endpoints"
	"file-system/internal/api/handlers"
	"file-system/internal/api/validators"
	"file-system/internal/common"
	"file-system/internal/domain/repository"
	"file-system/internal/infrastructure/mediator"
	"file-system/internal/infrastructure/s3"
	"file-system/internal/middleware"
	"io"
	"net/http"

	"github.com/gin-gonic/gin"
	swaggerFiles "github.com/swaggo/files"
	ginSwagger "github.com/swaggo/gin-swagger"
)

// @title           RustFS File System API
// @version         1.1
// @description     RustFS 文件存储系统 API，支持分片上传、文件预览、分页查询等高级功能。
// @host            localhost:8080
// @BasePath        /
func main() {
	cfg := common.LoadConfig()

	// Infrastructure
	rustfsClient := s3.NewRustFSClient(cfg)
	s3Repo := s3.NewS3FileRepository(rustfsClient)
	m := mediator.NewMediator()

	// Handlers
	uploadHandler := handlers.NewUploadFileHandler(s3Repo)
	downloadHandler := handlers.NewDownloadFileHandler(s3Repo)
	createBucketHandler := handlers.NewCreateBucketHandler(s3Repo)
	listBucketsHandler := handlers.NewListBucketsHandler(s3Repo)
	deleteBucketHandler := handlers.NewDeleteBucketHandler(s3Repo)
	// New Handlers
	listFilesHandler := handlers.NewListFilesHandler(s3Repo)
	previewHandler := handlers.NewGetFilePreviewHandler(s3Repo)
	initMultipartHandler := handlers.NewInitMultipartHandler(s3Repo)
	uploadPartHandler := handlers.NewUploadPartHandler(s3Repo)
	completeMultipartHandler := handlers.NewCompleteMultipartHandler(s3Repo)
	deleteFileHandler := handlers.NewDeleteFileHandler(s3Repo)

	// Register Handlers
	mediator.Register[handlers.UploadFileCommand, string](m, uploadHandler)
	mediator.Register[handlers.DownloadFileQuery, io.ReadCloser](m, downloadHandler)
	mediator.Register[handlers.CreateBucketCommand, string](m, createBucketHandler)
	mediator.Register[handlers.ListBucketsQuery, []string](m, listBucketsHandler)
	mediator.Register[handlers.DeleteBucketCommand, string](m, deleteBucketHandler)
	// New Registrations
	mediator.Register[handlers.ListFilesQuery, *repository.ListFilesResult](m, listFilesHandler)
	mediator.Register[handlers.GetFilePreviewQuery, string](m, previewHandler)
	mediator.Register[handlers.InitMultipartCommand, string](m, initMultipartHandler)
	mediator.Register[handlers.UploadPartCommand, string](m, uploadPartHandler)
	mediator.Register[handlers.CompleteMultipartCommand, string](m, completeMultipartHandler)
	mediator.Register[handlers.DeleteFileCommand, string](m, deleteFileHandler)

	// Validators
	uploadValidator := validators.NewUploadFileValidator()
	downloadValidator := validators.NewDownloadFileValidator()
	createBucketValidator := validators.NewCreateBucketValidator()
	newFeaturesValidator := validators.NewNewFeaturesValidator()

	// Endpoints
	fileEndpoint := endpoints.NewFileEndpoint(m, uploadValidator, downloadValidator, newFeaturesValidator)
	bucketEndpoint := endpoints.NewBucketEndpoint(m, createBucketValidator)

	// Router
	r := gin.Default()

	// CORS
	r.Use(func(c *gin.Context) {
		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
		c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
		c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT, DELETE")
		if c.Request.Method == "OPTIONS" {
			c.AbortWithStatus(204)
			return
		}
		c.Next()
	})

	// API授权中间件组
	api := r.Group("/")
	api.Use(middleware.AuthMiddleware())
	{
		// File operations
		api.POST("/files/upload", fileEndpoint.UploadFile)
		api.GET("/files/download", fileEndpoint.DownloadFile)
		api.GET("/files/list", fileEndpoint.ListFiles)
		api.GET("/files/preview", fileEndpoint.GetPreviewURL)

		// Delete file
		api.DELETE("/files/delete", fileEndpoint.DeleteFile)

		// Multipart Upload
		api.POST("/files/multipart/init", fileEndpoint.InitMultipart)
		api.PUT("/files/multipart/part", fileEndpoint.UploadPart)
		api.POST("/files/multipart/complete", fileEndpoint.CompleteMultipart)

		// Bucket operations
		api.POST("/buckets", bucketEndpoint.CreateBucket)
		api.GET("/buckets", bucketEndpoint.ListBuckets)
		api.DELETE("/buckets", bucketEndpoint.DeleteBucket)
	}

	// Swagger
	r.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))

	// Web UI
	r.Static("/web", "./web")
	r.GET("/", func(c *gin.Context) {
		c.Redirect(http.StatusMovedPermanently, "/web")
	})

	r.Run(":" + cfg.ServerPort)
}