package utils

import (
	"encoding/json"
	"fmt"
	"github.com/aldinokemal/go-whatsapp-web-multidevice/config"
	"go.mau.fi/whatsmeow"
	"go.mau.fi/whatsmeow/appstate"
	waProto "go.mau.fi/whatsmeow/binary/proto"
	"go.mau.fi/whatsmeow/store"
	"go.mau.fi/whatsmeow/store/sqlstore"
	"go.mau.fi/whatsmeow/types"
	"go.mau.fi/whatsmeow/types/events"
	waLog "go.mau.fi/whatsmeow/util/log"
	"google.golang.org/protobuf/proto"
	"mime"
	"os"
	"strings"
	"sync/atomic"
	"time"
)

var (
	cli           *whatsmeow.Client
	log           waLog.Logger
	historySyncID int32
	startupTime   = time.Now().Unix()
)

const logLevel = "DEBUG"

func ParseJID(arg string) (types.JID, bool) {
	if arg[0] == '+' {
		arg = arg[1:]
	}
	if !strings.ContainsRune(arg, '@') {
		return types.NewJID(arg, types.DefaultUserServer), true
	} else {
		recipient, err := types.ParseJID(arg)
		if err != nil {
			_ = fmt.Errorf("Invalid JID %s: %v", arg, err)
			return recipient, false
		} else if recipient.User == "" {
			_ = fmt.Errorf("Invalid JID %s: no server specified", arg)
			return recipient, false
		}
		return recipient, true
	}
}

func InitWaDB() *sqlstore.Container {
	// Running Whatsapp
	log = waLog.Stdout("Main", logLevel, true)
	dbLog := waLog.Stdout("Database", logLevel, true)
	storeContainer, err := sqlstore.New("sqlite3", fmt.Sprintf("file:%s?_foreign_keys=off", config.DBName), dbLog)
	if err != nil {
		log.Errorf("Failed to connect to database: %v", err)
		panic(err)

	}
	return storeContainer
}

func InitWaCLI(storeContainer *sqlstore.Container) *whatsmeow.Client {
	device, err := storeContainer.GetFirstDevice()
	if err != nil {
		log.Errorf("Failed to get device: %v", err)
		panic(err)
	}

	store.CompanionProps.PlatformType = waProto.CompanionProps_UNKNOWN.Enum()
	store.CompanionProps.Os = proto.String("AldinoKemal")
	cli = whatsmeow.NewClient(device, waLog.Stdout("Client", logLevel, true))
	cli.AddEventHandler(handler)

	return cli
}

func MustLogin(waCli *whatsmeow.Client) {
	if !waCli.IsConnected() {
		panic(AuthError{Message: "you are not connect to whatsapp server, please reconnect"})
	} else if !waCli.IsLoggedIn() {
		panic(AuthError{Message: "you are not login"})
	}
}

func handler(rawEvt interface{}) {
	switch evt := rawEvt.(type) {
	case *events.AppStateSyncComplete:
		if len(cli.Store.PushName) > 0 && evt.Name == appstate.WAPatchCriticalBlock {
			err := cli.SendPresence(types.PresenceAvailable)
			if err != nil {
				log.Warnf("Failed to send available presence: %v", err)
			} else {
				log.Infof("Marked self as available")
			}
		}
	case *events.Connected, *events.PushNameSetting:
		if len(cli.Store.PushName) == 0 {
			return
		}
		// Send presence available when connecting and when the pushname is changed.
		// This makes sure that outgoing messages always have the right pushname.
		err := cli.SendPresence(types.PresenceAvailable)
		if err != nil {
			log.Warnf("Failed to send available presence: %v", err)
		} else {
			log.Infof("Marked self as available")
		}
	case *events.StreamReplaced:
		os.Exit(0)
	case *events.Message:
		metaParts := []string{fmt.Sprintf("pushname: %s", evt.Info.PushName), fmt.Sprintf("timestamp: %s", evt.Info.Timestamp)}
		if evt.Info.Type != "" {
			metaParts = append(metaParts, fmt.Sprintf("type: %s", evt.Info.Type))
		}
		if evt.Info.Category != "" {
			metaParts = append(metaParts, fmt.Sprintf("category: %s", evt.Info.Category))
		}
		if evt.IsViewOnce {
			metaParts = append(metaParts, "view once")
		}
		if evt.IsViewOnce {
			metaParts = append(metaParts, "ephemeral")
		}

		log.Infof("Received message %s from %s (%s): %+v", evt.Info.ID, evt.Info.SourceString(), strings.Join(metaParts, ", "), evt.Message)

		img := evt.Message.GetImageMessage()
		if img != nil {
			data, err := cli.Download(img)
			if err != nil {
				log.Errorf("Failed to download image: %v", err)
				return
			}
			exts, _ := mime.ExtensionsByType(img.GetMimetype())
			path := fmt.Sprintf("%s%s", evt.Info.ID, exts[0])
			err = os.WriteFile(path, data, 0600)
			if err != nil {
				log.Errorf("Failed to save image: %v", err)
				return
			}
			log.Infof("Saved image in message to %s", path)
		}
	case *events.Receipt:
		if evt.Type == events.ReceiptTypeRead || evt.Type == events.ReceiptTypeReadSelf {
			log.Infof("%v was read by %s at %s", evt.MessageIDs, evt.SourceString(), evt.Timestamp)
		} else if evt.Type == events.ReceiptTypeDelivered {
			log.Infof("%s was delivered to %s at %s", evt.MessageIDs[0], evt.SourceString(), evt.Timestamp)
		}
	case *events.Presence:
		if evt.Unavailable {
			if evt.LastSeen.IsZero() {
				log.Infof("%s is now offline", evt.From)
			} else {
				log.Infof("%s is now offline (last seen: %s)", evt.From, evt.LastSeen)
			}
		} else {
			log.Infof("%s is now online", evt.From)
		}
	case *events.HistorySync:
		id := atomic.AddInt32(&historySyncID, 1)
		fileName := fmt.Sprintf("history-%d-%d.json", startupTime, id)
		file, err := os.OpenFile(fileName, os.O_WRONLY|os.O_CREATE, 0600)
		if err != nil {
			log.Errorf("Failed to open file to write history sync: %v", err)
			return
		}
		enc := json.NewEncoder(file)
		enc.SetIndent("", "  ")
		err = enc.Encode(evt.Data)
		if err != nil {
			log.Errorf("Failed to write history sync: %v", err)
			return
		}
		log.Infof("Wrote history sync to %s", fileName)
		_ = file.Close()
	case *events.AppState:
		log.Debugf("App state event: %+v / %+v", evt.Index, evt.SyncActionValue)
	}
}