package webdav

import (
	"bytes"
	"io"
	"net/http"
	"strconv"

	"git.ma-al.com/goc_daniel/b2b/app/config"
	"git.ma-al.com/goc_daniel/b2b/app/service/storageService"
	"git.ma-al.com/goc_daniel/b2b/app/utils/responseErrors"
	"github.com/gofiber/fiber/v3"
)

type StorageHandler struct {
	storageService *storageService.StorageService
	config         *config.Config
}

func NewStorageHandler() *StorageHandler {
	return &StorageHandler{
		storageService: storageService.New(),
		config:         config.Get(),
	}
}

func StorageHandlerRoutes(r fiber.Router) fiber.Router {
	handler := NewStorageHandler()

	// for webdav use only
	r.Get("/*", handler.Get)
	r.Head("/*", handler.Get)
	r.Put("/*", handler.Put)
	r.Delete("/*", handler.Delete)
	r.Add([]string{"MKCOL"}, "/*", handler.Mkcol)
	r.Add([]string{"PROPFIND"}, "/*", handler.Propfind)
	r.Add([]string{"PROPPATCH"}, "/*", handler.Proppatch)
	r.Add([]string{"MOVE"}, "/*", handler.Move)
	r.Add([]string{"COPY"}, "/*", handler.Copy)

	return r
}

func (h *StorageHandler) Get(c fiber.Ctx) error {
	// fmt.Println("GET")
	absPath, err := h.storageService.AbsPath(h.config.Storage.RootFolder, c.Params("*"))
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}

	info, err := h.storageService.EntryInfo(absPath)
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}

	if info.IsDir() {
		xml, err := h.storageService.Propfind(h.config.Storage.RootFolder, absPath, "1")
		if err != nil {
			return c.SendStatus(responseErrors.GetErrorStatus(err))
		}

		c.Set("Content-Type", `application/xml; charset="utf-8"`)
		return c.Status(http.StatusMultiStatus).SendString(xml)

	} else {
		f, filename, filesize, err := h.storageService.DownloadFilePrep(absPath)
		if err != nil {
			return c.SendStatus(responseErrors.GetErrorStatus(err))
		}

		c.Attachment(filename)
		c.Set("Content-Length", strconv.FormatInt(filesize, 10))
		c.Set("Content-Type", "application/octet-stream")
		return c.SendStream(f, int(filesize))
	}
}

func (h *StorageHandler) Put(c fiber.Ctx) error {
	// fmt.Println("PUT")
	absPath, err := h.storageService.AbsPath(h.config.Storage.RootFolder, c.Params("*"))
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}

	var src io.Reader
	if bodyStream := c.Request().BodyStream(); bodyStream != nil {
		defer c.Request().CloseBodyStream()
		src = bodyStream
	} else {
		src = bytes.NewReader(c.Body())
	}

	err = h.storageService.Put(absPath, src)
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}

	return c.SendStatus(http.StatusCreated)
}

func (h *StorageHandler) Delete(c fiber.Ctx) error {
	// fmt.Println("DELETE")
	absPath, err := h.storageService.AbsPath(h.config.Storage.RootFolder, c.Params("*"))
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}
	if absPath == h.config.Storage.RootFolder {
		return c.SendStatus(responseErrors.GetErrorStatus(responseErrors.ErrAccessDenied))
	}

	err = h.storageService.Delete(absPath)
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}

	return c.SendStatus(http.StatusNoContent)
}

func (h *StorageHandler) Mkcol(c fiber.Ctx) error {
	// fmt.Println("Mkcol")
	absPath, err := h.storageService.AbsPath(h.config.Storage.RootFolder, c.Params("*"))
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}

	err = h.storageService.Mkcol(absPath)
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}

	return c.SendStatus(http.StatusCreated)
}

func (h *StorageHandler) Propfind(c fiber.Ctx) error {
	// fmt.Println("PROPFIND")
	absPath, err := h.storageService.AbsPath(h.config.Storage.RootFolder, c.Params("*"))
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}

	xml, err := h.storageService.Propfind(h.config.Storage.RootFolder, absPath, "1")
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}

	c.Set("Content-Type", `application/xml; charset="utf-8"`)
	return c.Status(http.StatusMultiStatus).SendString(xml)
}

func (h *StorageHandler) Proppatch(c fiber.Ctx) error {
	return c.SendStatus(http.StatusNotImplemented) // 501
}

func (h *StorageHandler) Move(c fiber.Ctx) error {
	// fmt.Println("MOVE")
	srcAbsPath, err := h.storageService.AbsPath(h.config.Storage.RootFolder, c.Params("*"))
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}

	dest := c.Get("Destination")
	if dest == "" {
		return c.SendStatus(http.StatusBadRequest)
	}
	destAbsPath, err := h.storageService.ObtainDestPath(h.config.Storage.RootFolder, dest)
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}

	err = h.storageService.Move(srcAbsPath, destAbsPath)
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}
	return c.SendStatus(http.StatusCreated)
}

func (h *StorageHandler) Copy(c fiber.Ctx) error {
	// fmt.Println("COPY")
	srcAbsPath, err := h.storageService.AbsPath(h.config.Storage.RootFolder, c.Params("*"))
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}

	dest := c.Get("Destination")
	if dest == "" {
		return c.SendStatus(http.StatusBadRequest)
	}
	destAbsPath, err := h.storageService.ObtainDestPath(h.config.Storage.RootFolder, dest)
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}

	err = h.storageService.Copy(srcAbsPath, destAbsPath)
	if err != nil {
		return c.SendStatus(responseErrors.GetErrorStatus(err))
	}
	return c.SendStatus(http.StatusCreated)
}