package app

import (
	"context"
	"errors"
	"net"
	"sync"
	"time"

	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials/insecure"
	walletv1 "hyapp.local/api/proto/wallet/v1"
	"hyapp/pkg/grpchealth"
	"hyapp/pkg/healthhttp"
	"hyapp/pkg/logx"
	"hyapp/pkg/rocketmqx"
	servicegrpc "hyapp/pkg/servicekit/grpcserver"
	servicehealth "hyapp/pkg/servicekit/health"
	"hyapp/services/wallet-service/internal/client"
	"hyapp/services/wallet-service/internal/client/googleplay"
	"hyapp/services/wallet-service/internal/client/mifapay"
	"hyapp/services/wallet-service/internal/client/trongrid"
	"hyapp/services/wallet-service/internal/client/v5pay"
	"hyapp/services/wallet-service/internal/config"
	walletservice "hyapp/services/wallet-service/internal/service/wallet"
	mysqlstorage "hyapp/services/wallet-service/internal/storage/mysql"
	grpcserver "hyapp/services/wallet-service/internal/transport/grpc"
)

// App 装配 wallet-service gRPC 入口。
type App struct {
	server                             *grpc.Server
	listener                           net.Listener
	health                             *grpchealth.ServingChecker
	healthHTTP                         *healthhttp.Server
	mysqlRepo                          *mysqlstorage.Repository
	walletSvc                          *walletservice.Service
	activityConn                       *grpc.ClientConn
	outboxProducer                     *rocketmqx.Producer
	realtimeOutboxProducer             *rocketmqx.Producer
	projectionConsumer                 *rocketmqx.Consumer
	outboxWorkerCfg                    config.OutboxWorkerConfig
	realtimeOutboxWorkerCfg            config.OutboxWorkerConfig
	projectionWorkerCfg                config.ProjectionWorkerConfig
	externalRechargeReconcileWorkerCfg config.ExternalRechargeReconcileWorkerConfig
	walletOutboxTopic                  string
	realtimeWalletOutboxTopic          string
	nodeID                             string
	redPacketExpiryWorkerCfg           config.RedPacketExpiryWorkerConfig
	stopWorker                         context.CancelFunc
	workers                            sync.WaitGroup
	closeOnce                          sync.Once
}

// New 初始化 wallet-service。
func New(cfg config.Config) (*App, error) {
	startupCtx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	repository, err := mysqlstorage.Open(startupCtx, cfg.MySQLDSN)
	if err != nil {
		return nil, err
	}

	listener, err := net.Listen("tcp", cfg.GRPCAddr)
	if err != nil {
		_ = repository.Close()
		return nil, err
	}
	activityConn, err := grpc.Dial(cfg.ActivityServiceAddr, grpc.WithTransportCredentials(insecure.NewCredentials()))
	if err != nil {
		_ = listener.Close()
		_ = repository.Close()
		return nil, err
	}
	var outboxProducer *rocketmqx.Producer
	if cfg.RocketMQ.WalletOutbox.Enabled {
		outboxProducer, err = rocketmqx.NewProducer(rocketMQProducerConfig(cfg.RocketMQ, cfg.RocketMQ.WalletOutbox.ProducerGroup))
		if err != nil {
			_ = activityConn.Close()
			_ = listener.Close()
			_ = repository.Close()
			return nil, err
		}
	}
	var realtimeOutboxProducer *rocketmqx.Producer
	if cfg.RocketMQ.RealtimeOutbox.Enabled {
		realtimeOutboxProducer, err = rocketmqx.NewProducer(rocketMQProducerConfig(cfg.RocketMQ, cfg.RocketMQ.RealtimeOutbox.ProducerGroup))
		if err != nil {
			shutdownProducers(outboxProducer)
			_ = activityConn.Close()
			_ = listener.Close()
			_ = repository.Close()
			return nil, err
		}
	}

	server := servicegrpc.New("wallet-service")
	svc := walletservice.New(repository, client.NewActivityAchievementClient(activityConn))
	svc.SetExternalRechargeConfig(walletservice.ExternalRechargeConfig{
		USDTTRC20Enabled: cfg.ExternalRecharge.USDTTRC20Enabled,
		USDTTRC20Address: cfg.ExternalRecharge.USDTTRC20Address,
		MifaPayNotifyURL: cfg.ExternalRecharge.MifaPayNotifyURL,
		MifaPayReturnURL: cfg.ExternalRecharge.MifaPayReturnURL,
		V5PayNotifyURL:   cfg.ExternalRecharge.V5PayNotifyURL,
		V5PayReturnURL:   cfg.ExternalRecharge.V5PayReturnURL,
	})
	if cfg.GooglePlay.Enabled {
		googleClient, err := googleplay.New(cfg.GooglePlay)
		if err != nil {
			shutdownProducers(outboxProducer, realtimeOutboxProducer)
			_ = activityConn.Close()
			_ = listener.Close()
			_ = repository.Close()
			return nil, err
		}
		svc.SetGooglePlayClient(googleClient)
	}
	if cfg.MifaPay.Enabled {
		if mifapayConfigReady(cfg.MifaPay) {
			mifaPayClient, err := mifapay.New(cfg.MifaPay)
			if err != nil {
				shutdownProducers(outboxProducer, realtimeOutboxProducer)
				_ = activityConn.Close()
				_ = listener.Close()
				_ = repository.Close()
				return nil, err
			}
			svc.SetMifaPayClient(mifaPayClient)
		} else {

			logx.Warn(context.Background(), "mifapay_enabled_without_credentials")
		}
	}
	if cfg.V5Pay.Enabled {
		if v5payConfigReady(cfg.V5Pay) {
			svc.SetV5PayClient(v5pay.New(cfg.V5Pay))
		} else {

			logx.Warn(context.Background(), "v5pay_enabled_without_credentials")
		}
	}
	if cfg.TronGrid.Enabled {
		svc.SetTronUSDTClient(trongrid.New(cfg.TronGrid))
	}
	walletv1.RegisterWalletServiceServer(server, grpcserver.NewServer(svc))
	walletv1.RegisterWalletCronServiceServer(server, grpcserver.NewCronServer(svc))
	health, healthHTTP, err := servicehealth.New(server, servicehealth.Config{
		ServiceName: "wallet-service",
		HTTPAddr:    cfg.HealthHTTPAddr,
		NodeID:      cfg.NodeID,
		Dependencies: []grpchealth.Dependency{{
			Name:  "mysql",
			Check: repository.Ping,
		}},
	})
	if err != nil {
		shutdownProducers(outboxProducer, realtimeOutboxProducer)
		_ = activityConn.Close()
		_ = listener.Close()
		_ = repository.Close()
		return nil, err
	}
	projectionConsumer, err := newWalletProjectionConsumer(cfg, svc)
	if err != nil {
		shutdownProducers(outboxProducer, realtimeOutboxProducer)
		_ = activityConn.Close()
		_ = listener.Close()
		_ = repository.Close()
		return nil, err
	}

	return &App{
		server:                             server,
		listener:                           listener,
		health:                             health,
		healthHTTP:                         healthHTTP,
		mysqlRepo:                          repository,
		walletSvc:                          svc,
		activityConn:                       activityConn,
		outboxProducer:                     outboxProducer,
		realtimeOutboxProducer:             realtimeOutboxProducer,
		projectionConsumer:                 projectionConsumer,
		outboxWorkerCfg:                    cfg.OutboxWorker,
		realtimeOutboxWorkerCfg:            cfg.RealtimeOutboxWorker,
		projectionWorkerCfg:                cfg.ProjectionWorker,
		externalRechargeReconcileWorkerCfg: cfg.ExternalRechargeReconcileWorker,
		walletOutboxTopic:                  cfg.RocketMQ.WalletOutbox.Topic,
		realtimeWalletOutboxTopic:          cfg.RocketMQ.RealtimeOutbox.Topic,
		nodeID:                             cfg.NodeID,
		redPacketExpiryWorkerCfg:           cfg.RedPacketExpiryWorker,
	}, nil
}

// Run 启动 gRPC 服务。
func (a *App) Run() error {
	a.runHealthHTTP()
	if err := a.startMQ(); err != nil {
		a.health.MarkStopped()
		return err
	}
	a.runBackgroundWorkers()
	a.health.MarkServing()
	err := a.server.Serve(a.listener)
	a.health.MarkStopped()
	a.closeBackgroundWorkers()
	a.shutdownMQ()
	if errors.Is(err, grpc.ErrServerStopped) {
		return nil
	}

	return err
}

// Close 关闭 gRPC 服务。
func (a *App) Close() {
	a.closeOnce.Do(func() {
		a.health.MarkDraining()
		a.closeBackgroundWorkers()
		servicegrpc.GracefulStop(a.server, 15*time.Second)
		a.closeHealthHTTP()
		if a.activityConn != nil {
			_ = a.activityConn.Close()
		}
		a.shutdownMQ()
		if a.mysqlRepo != nil {

			_ = a.mysqlRepo.Close()
		}
	})
}