/*
 *	itd uses bluetooth low energy to communicate with InfiniTime devices
 *	Copyright (C) 2021 Arsen Musayelyan
 *
 *	This program is free software: you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation, either version 3 of the License, or
 *	(at your option) any later version.
 *
 *	This program is distributed in the hope that it will be useful,
 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *	GNU General Public License for more details.
 *
 *	You should have received a copy of the GNU General Public License
 *	along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package filesystem

import (
	"io"
	"io/ioutil"
	"os"
	"path/filepath"

	"github.com/cheggaaa/pb/v3"
	"github.com/rs/zerolog/log"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	"go.arsenm.dev/itd/api"
)

// readCmd represents the read command
var readCmd = &cobra.Command{
	Use:   `read <remote path> <local path | "-">`,
	Short: "Read a file from InfiniTime",
	Run: func(cmd *cobra.Command, args []string) {
		if len(args) != 2 {
			cmd.Usage()
			log.Fatal().Msg("Command read requires two arguments")
		}

		var tmpFile *os.File
		var path string
		var err error
		if args[1] == "-" {
			tmpFile, err = ioutil.TempFile("/tmp", "itctl.*")
			if err != nil {
				log.Fatal().Err(err).Msg("Error creating temporary file")
			}
			path = tmpFile.Name()
		} else {
			path, err = filepath.Abs(args[1])
			if err != nil {
				log.Fatal().Err(err).Msg("Error making absolute directory")
			}
		}

		client := viper.Get("client").(*api.Client)

		progress, err := client.ReadFile(path, args[0])
		if err != nil {
			log.Fatal().Err(err).Msg("Error reading remote file")
		}

		// Create progress bar template
		barTmpl := `{{counters . }} B {{bar . "|" "-" (cycle .) " " "|"}} {{percent . }} {{rtime . "%s"}}`
		// Start full bar at 0 total
		bar := pb.ProgressBarTemplate(barTmpl).Start(0)
		// Get progress events
		for event := range progress {
			// Set total bytes in progress bar
			bar.SetTotal(int64(event.Total))
			// Set amount of bytes sent in progress bar
			bar.SetCurrent(int64(event.Sent))
			// If transfer finished, break
			if event.Done {
				bar.Finish()
				break
			}
		}

		if args[1] == "-" {
			io.Copy(os.Stdout, tmpFile)
			os.Stdout.WriteString("\n")
			os.Stdout.Sync()
			tmpFile.Close()
		}
	},
}

func init() {
	filesystemCmd.AddCommand(readCmd)
}