package app

import (
	"context"
	"errors"
	"github.com/themakers/hlog"
	"go.uber.org/zap"
	"penahub.gitlab.yandexcloud.net/backend/quiz/common.git/dal"
	answerwc2 "penahub.gitlab.yandexcloud.net/backend/quiz/worker/internal/answerwc"
	"penahub.gitlab.yandexcloud.net/backend/quiz/worker/internal/initialize"
	privilegewc2 "penahub.gitlab.yandexcloud.net/backend/quiz/worker/internal/privilegewc"
	senders2 "penahub.gitlab.yandexcloud.net/backend/quiz/worker/internal/senders"
	"penahub.gitlab.yandexcloud.net/backend/quiz/worker/internal/workers/shortstat"
	"penahub.gitlab.yandexcloud.net/backend/quiz/worker/internal/workers/timeout"
	"penahub.gitlab.yandexcloud.net/backend/quiz/worker/pkg/closer"
	"time"
)

var zapOptions = []zap.Option{
	zap.AddCaller(),
	zap.AddCallerSkip(2),
	zap.AddStacktrace(zap.ErrorLevel),
}

type Build struct {
	Commit  string
	Version string
}

func New(ctx context.Context, cfg initialize.Config, build Build) error {
	var (
		err, workerErr error
		zapLogger      *zap.Logger
		errChan        = make(chan error)
	)

	if cfg.LoggerProdMode {
		zapLogger, err = zap.NewProduction(zapOptions...)
		if err != nil {
			return err
		}
	} else {
		zapLogger, err = zap.NewDevelopment(zapOptions...)
		if err != nil {
			return err
		}
	}

	zapLogger = zapLogger.With(
		zap.String("SvcCommit", build.Commit),
		zap.String("SvcVersion", build.Version),
		zap.String("SvcBuildTime", time.Now().String()),
	)

	logger := hlog.New(zapLogger)
	logger.Emit(InfoSvcStarted{})

	shutdownGroup := closer.NewCloserGroup()

	go func() {
		for {
			select {
			case <-ctx.Done():
				return
			case err := <-errChan:
				zapLogger.Error("Ошибка при работе воркера", zap.Error(err))
			}
		}
	}()

	redisClient, err := initialize.Redis(ctx, cfg)
	if err != nil {
		zapLogger.Error("failed init redis", zap.Error(err))
		return err
	}

	minioClient, err := initialize.NewMinio(cfg)
	if err != nil {
		zapLogger.Error("failed init minio", zap.Error(err))
		return err
	}

	clients := initialize.NewClients(cfg, zapLogger)

	// tgSender, err := senders.NewTgSender(options.TgToken)
	// if err != nil {
	// 	fmt.Println(err)
	// 	return nil, err
	// }
	mailSender := senders2.NewMailLeadSender(clients.MailClient)
	leadSenders := []senders2.LeadSender{mailSender /* , tgSender */}

	pgdal, err := dal.New(ctx, cfg.PostgresCredentials, minioClient)
	if err != nil {
		zapLogger.Error("failed init postgres", zap.Error(err))
		return err
	}

	kafkaWorker, err := privilegewc2.NewKafkaConsumerWorker(privilegewc2.Config{
		KafkaBroker:    cfg.KafkaBroker,
		KafkaTopic:     cfg.KafkaTopic,
		ServiceKey:     cfg.ServiceName,
		TickerInterval: time.Second * 10,
		ErrChan:        errChan,
	}, redisClient, pgdal)
	if err != nil {
		zapLogger.Error("Failed start privilege worker", zap.Error(err))
		return err
	}

	checkWorker := privilegewc2.NewCheckWorker(privilegewc2.Deps{
		PrivilegeIDsDays:  []string{"quizUnlimTime", "squizHideBadge"},
		PrivilegeIDsCount: []string{"quizCnt", "quizManual"},
		TickerInterval:    time.Minute,
		PrivilegeDAL:      pgdal,
		CustomerClient:    clients.CustomerClient,
	}, errChan)

	go kafkaWorker.Start(ctx)
	go checkWorker.Start(ctx)

	toClientWorker := answerwc2.NewSendToClient(answerwc2.DepsSendToClient{
		Redis:           redisClient,
		Dal:             pgdal,
		LeadSenders:     leadSenders,
		CustomerService: clients.CustomerClient,
	}, errChan)

	toRespWorker := answerwc2.NewRespWorker(answerwc2.DepsRespWorker{
		Redis:      redisClient,
		Dal:        pgdal,
		MailClient: mailSender,
	}, errChan)

	go toClientWorker.Start(ctx)
	go toRespWorker.Start(ctx)

	tow := timeout.New(pgdal, time.Minute)
	statW := shortstat.New(pgdal, 5*time.Minute)
	tow.ExposeErr(ctx, &workerErr)
	statW.ExposeErr(ctx, &workerErr)
	go tow.Start(ctx)
	go statW.Start(ctx)

	logger.Emit(InfoSvcReady{})
	shutdownGroup.Add(closer.CloserFunc(pgdal.Close))

	<-ctx.Done()

	timeoutCtx, timeoutCancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer timeoutCancel()
	if err := shutdownGroup.Call(timeoutCtx); err != nil {
		if errors.Is(err, context.DeadlineExceeded) {
			zapLogger.Error("Shutdown timed out", zap.Error(err))
		} else {
			zapLogger.Error("Failed to shutdown services gracefully", zap.Error(err))
		}
		return err
	}

	zapLogger.Info("Application has stopped")
	return nil
}