package httpRequest

import (
	"net/http"
	"strings"

	"go-socket/packages/convertions"
	"go-socket/packages/globals"
	"go-socket/packages/minio"
)

func HandleFileUpload(response http.ResponseWriter, request *http.Request) {
	if !postValidCheckWithResponseOnFail(&response, request, true) {
		return
	}
	ctx := request.Context()

	user, err := getUserByToken(ctx, request.Header.Get("token"))
	if err != nil {
		http.Error(response, "invalid token", http.StatusUnauthorized)
		return
	}

	request.Body = http.MaxBytesReader(response, request.Body, int64(globals.MaxPostWithFileBytes))

	if err = request.ParseMultipartForm(int64(globals.MaxPostBytes)); err != nil {
		http.Error(response, "invalid multipart form", http.StatusBadRequest)
		return
	}

	connectionId, err := convertions.ConvertStringUuid(request.FormValue("connectionid"))
	if err != nil {
		http.Error(response, "invalid connectionid", http.StatusBadRequest)
		return
	}
	_, ok := user.Connections[connectionId]
	if !ok {
		http.Error(response, "no such connection", http.StatusUnauthorized)
		return
	}

	file, header, err := request.FormFile("file")
	if err != nil {
		http.Error(response, "missing file", http.StatusBadRequest)
		return
	}
	defer file.Close()

	contentType := header.Header.Get("Content-Type")
	key := minio.GetKey(connectionId, contentType)

	if err = minio.Upload(ctx, key, file, header.Size, contentType, map[string]string{
		"originalName": header.Filename,
		"uploaderId":   user.Id.String(),
	}); err != nil {
		http.Error(response, "upload failed", http.StatusInternalServerError)
		return
	}

	response.WriteHeader(http.StatusCreated)
	response.Write([]byte(key))
}

func HandleFileDownload(response http.ResponseWriter, request *http.Request) {
	if !postValidCheckWithResponseOnFail(&response, request, false) {
		return
	}
	ctx := request.Context()

	user, err := getUserByToken(ctx, request.Header.Get("token"))
	if err != nil {
		http.Error(response, "invalid token", http.StatusUnauthorized)
		return
	}

	connectionId, err := convertions.ConvertStringUuid(request.FormValue("connectionid"))
	if err != nil {
		http.Error(response, "invalid connectionid", http.StatusBadRequest)
		return
	}
	if _, ok := user.Connections[connectionId]; !ok {
		http.Error(response, "no such connection", http.StatusUnauthorized)
		return
	}

	key := request.FormValue("key")
	if !strings.HasPrefix(key, connectionId.String()+"/") {
		http.Error(response, "no such file", http.StatusUnauthorized)
		return
	}

	url, err := minio.GetDownloadUrl(ctx, key)
	if err != nil {
		http.Error(response, "no such file", http.StatusUnauthorized)
		return
	}

	response.WriteHeader(http.StatusOK)
	response.Write([]byte(url.String()))
}