package main

import (
	"fmt"
	"time"

	"gosvc/httpserver"
	"gosvc/logger"
	"gosvc/validator"
	"robotfs/entity"
	"robotfs/utils"
)

type DeleteParams struct {
	Path  string
	IsDir bool
}

func (d *DeleteParams) Validate() error {
	return validator.WithIf(
		d.Path == "", "Path is empty",
	).Validate()
}

type CopyParams struct {
	GeneralParams
}

type RenameParams struct {
	GeneralParams
}

type GeneralParams struct {
	SrcPath string
	DstPath string
	IsDir   bool
}

func (g *GeneralParams) Validate() error {
	return validator.ChainValidate(
		validator.WithIf(
			g.SrcPath == "", "SrcPath is empty",
		),
		validator.WithIf(
			g.DstPath == "", "DstPath is empty",
		),
	)
}

func (s *Service) HandleUploadFile(
	req *httpserver.Request,
	resp *httpserver.Response,
) *httpserver.Response {
	path := req.QueryString("path")
	newPath := utils.NormalizePath(path)

	file, fileHeader, err := req.FormFile("file")
	if err != nil {
		return resp.InternalServerError("get file failed, " + err.Error())
	}
	defer file.Close()

	contentType := fileHeader.Header.Get("Content-Type")
	fileSize := fileHeader.Size

	if err := s.FileSystem.CreateFile(req.Context(), utils.FullPath(newPath), file, contentType, fileSize); err != nil {
		logger.Error("create %s: %v", path, err)
		out := entity.NewError[any](
			entity.CodeInternalServer,
			entity.ErrUploadFile,
			map[string]interface{}{
				"detail": "upload file failed, " + err.Error(),
			},
		)
		return resp.OK(out).JSON()
	}

	return resp.OK(entity.NewSuccess("")).JSON()
}

func (s *Service) HandleInfoFile(
	req *httpserver.Request,
	resp *httpserver.Response,
) *httpserver.Response {
	path := req.QueryString("path")
	newPath := utils.NormalizePath(path)

	entry, err := s.FileSystem.FindEntry(req.Context(), utils.FullPath(newPath))
	if err != nil {
		logger.Error("info %s: %v", path, err)
		out := entity.NewError[any](
			entity.CodeInternalServer,
			entity.ErrInfoFile,
			map[string]interface{}{
				"detail": "info file failed, " + err.Error(),
			},
		)
		return resp.OK(out).JSON()
	}

	return resp.OK(entity.NewSuccess(entry)).JSON()
}

func (s *Service) HandleDownloadFile(
	req *httpserver.Request,
	resp *httpserver.Response,
) *httpserver.Response {
	path := req.QueryString("path")
	preview := req.QueryBool("preview")
	newPath := utils.NormalizePath(path)

	downloader, entry, err := s.FileSystem.DownloadFile(req.Context(), utils.FullPath(newPath))
	if err != nil {
		logger.Error("download %s: %v", path, err)
		out := entity.NewError[any](
			entity.CodeInternalServer,
			entity.ErrDownloadFile,
			map[string]interface{}{
				"detail": "download file failed, " + err.Error(),
			},
		)
		return resp.OK(out).JSON()
	}
	defer downloader.Close()

	if !preview {
		resp.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%s", entry.FullPath.Name()))
	}

	return resp.ServeContent(entry.FullPath.Name(), time.Unix(entry.LastModificationTime, 0), downloader)
}

func (s *Service) HandleDeleteFile(
	req *httpserver.Request,
	resp *httpserver.Response,
) *httpserver.Response {
	params := req.Binded.(*DeleteParams)
	path := params.Path
	isDir := params.IsDir
	newPath := utils.NormalizePath(path)

	err := s.FileSystem.DeleteFile(req.Context(), utils.FullPath(newPath), isDir)
	if err != nil {
		logger.Error("delete file %s:  %v", path, err)
		out := entity.NewError[any](
			entity.CodeInternalServer,
			entity.ErrDeleteFile,
			map[string]interface{}{
				"detail": "delete file failed, " + err.Error(),
			},
		)
		return resp.OK(out).JSON()
	}

	return resp.OK(entity.NewSuccess("")).JSON()
}

func (s *Service) HandleRenameFile(
	req *httpserver.Request,
	resp *httpserver.Response,
) *httpserver.Response {
	params := req.Binded.(*RenameParams)
	isDir := params.IsDir
	srcPath := utils.FullPath(utils.NormalizePath(params.SrcPath))
	dstPath := utils.FullPath(utils.NormalizePath(params.DstPath))

	err := s.FileSystem.RenameFile(req.Context(), srcPath, dstPath, isDir)
	if err != nil {
		logger.Error("move file %s => %s:  %v", srcPath, dstPath, err)
		out := entity.NewError[any](
			entity.CodeInternalServer,
			entity.ErrRenameFile,
			map[string]interface{}{
				"detail": "move file failed, " + err.Error(),
			},
		)
		return resp.OK(out).JSON()
	}

	return resp.OK(entity.NewSuccess("")).JSON()
}

func (s *Service) HandleCopyFile(
	req *httpserver.Request,
	resp *httpserver.Response,
) *httpserver.Response {
	params := req.Binded.(*CopyParams)
	isDir := params.IsDir
	srcPath := utils.FullPath(utils.NormalizePath(params.SrcPath))
	dstPath := utils.FullPath(utils.NormalizePath(params.DstPath))

	err := s.FileSystem.CopyFile(req.Context(), srcPath, dstPath, isDir)
	if err != nil {
		logger.Error("copy file %s => %s:  %v", srcPath, dstPath, err)
		out := entity.NewError[any](
			entity.CodeInternalServer,
			entity.ErrCopyFile,
			map[string]interface{}{
				"detail": "copy file failed, " + err.Error(),
			},
		)
		return resp.OK(out).JSON()
	}

	return resp.OK(entity.NewSuccess("")).JSON()
}