/*
 *	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 cmd

import (
	"bufio"
	"encoding/json"
	"net"

	"github.com/cheggaaa/pb/v3"
	"github.com/mitchellh/mapstructure"
	"github.com/rs/zerolog/log"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	"go.arsenm.dev/itd/internal/types"
)

// upgradeCmd represents the upgrade command
var upgradeCmd = &cobra.Command{
	Use:     "upgrade",
	Short:   "Upgrade InfiniTime firmware using files or archive",
	Aliases: []string{"upg"},
	Run: func(cmd *cobra.Command, args []string) {
		// Connect to itd UNIX socket
		conn, err := net.Dial("unix", SockPath)
		if err != nil {
			log.Fatal().Err(err).Msg("Error dialing socket. Is itd running?")
		}
		defer conn.Close()

		var data types.ReqDataFwUpgrade
		// Get relevant data struct
		if viper.GetString("archive") != "" {
			// Get archive data struct
			data = types.ReqDataFwUpgrade{
				Type:  UpgradeTypeArchive,
				Files: []string{viper.GetString("archive")},
			}
		} else if viper.GetString("initPkt") != "" && viper.GetString("firmware") != "" {
			// Get files data struct
			data = types.ReqDataFwUpgrade{
				Type:  UpgradeTypeFiles,
				Files: []string{viper.GetString("initPkt"), viper.GetString("firmware")},
			}
		} else {
			cmd.Usage()
			log.Fatal().Msg("Upgrade command requires either archive or init packet and firmware.")
		}

		// Encode response into connection
		err = json.NewEncoder(conn).Encode(types.Request{
			Type: ReqTypeFwUpgrade,
			Data: data,
		})
		if err != nil {
			log.Fatal().Err(err).Msg("Error making request")
		}

		// Create progress bar template
		barTmpl := `{{counters . }} B {{bar . "|" "-" (cycle .) " " "|"}} {{percent . }} {{rtime . "%s"}}`
		// Start full bar at 0 total
		bar := pb.ProgressBarTemplate(barTmpl).Start(0)
		// Create new scanner of connection
		scanner := bufio.NewScanner(conn)
		for scanner.Scan() {
			var res types.Response
			// Decode scanned line into response struct
			err = json.Unmarshal(scanner.Bytes(), &res)
			if err != nil {
				log.Fatal().Err(err).Msg("Error decoding JSON response")
			}
			if res.Error {
				log.Fatal().Msg(res.Message)
			}
			var event DFUProgress
			// Decode response data into progress struct
			err = mapstructure.Decode(res.Value, &event)
			if err != nil {
				log.Fatal().Err(err).Msg("Error decoding response data")
			}
			// If transfer finished, break
			if event.Received == event.Total {
				break
			}
			// Set total bytes in progress bar
			bar.SetTotal(event.Total)
			// Set amount of bytes received in progress bar
			bar.SetCurrent(event.Received)
		}
		// Finish progress bar
		bar.Finish()
		if scanner.Err() != nil {
			log.Fatal().Err(scanner.Err()).Msg("Error while scanning output")
		}
	},
}

func init() {
	firmwareCmd.AddCommand(upgradeCmd)

	// Register flags
	upgradeCmd.Flags().StringP("archive", "a", "", "Path to firmware archive")
	upgradeCmd.Flags().StringP("init-pkt", "i", "", "Path to init packet (.dat file)")
	upgradeCmd.Flags().StringP("firmware", "f", "", "Path to firmware image (.bin file)")

	// Bind flags to viper keys
	viper.BindPFlag("archive", upgradeCmd.Flags().Lookup("archive"))
	viper.BindPFlag("initPkt", upgradeCmd.Flags().Lookup("init-pkt"))
	viper.BindPFlag("firmware", upgradeCmd.Flags().Lookup("firmware"))
}