package app

import (
	"context"
	"errors"
	"gitea.pena/PenaSide/heruvym/internal/initialize"
	"gitea.pena/PenaSide/heruvym/internal/server/http"
	"gitea.pena/PenaSide/heruvym/internal/utils/middleware"
	"gitea.pena/PenaSide/heruvym/pkg/closer"
	"gitea.pena/PenaSide/hlog"
	"go.uber.org/zap"
	"strconv"
	"time"
)

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

type Build struct {
	Commit    string
	Version   string
	BuildTime int64
}

type InfoSvcStarted struct{}

func Run(ctx context.Context, cfg initialize.Config, build Build) error {
	var logger *zap.Logger
	var err error

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

	logger = logger.With(
		zap.String("SvcCommit", build.Commit),
		zap.String("SvcVersion", build.Version),
		zap.String("SvcBuildTime", strconv.FormatInt(build.BuildTime, 10)),
	)

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

	defer func() {
		if r := recover(); r != nil {
			logger.Error("Recovered from a panic", zap.Any("error", r))
		}
	}()

	ctx, cancel := context.WithCancel(ctx)
	defer cancel()

	shutdownGroup := closer.NewCloserGroup()

	mw := middleware.NewMiddleware(
		hlogger,
		"*",
		nil,
	)

	mdb, err := initialize.MongoDB(ctx, cfg)
	if err != nil {
		logger.Error("Error initializing MongoDB", zap.Error(err))
		return err
	}

	minioClient, err := initialize.Minio(cfg)
	if err != nil {
		logger.Error("Error initializing Minio", zap.Error(err))
		return err
	}

	redisClient, err := initialize.Redis(ctx, cfg)
	if err != nil {
		logger.Error("Error initializing Redis", zap.Error(err))
		return err
	}

	tgBot, err := initialize.NewTgBot(cfg)
	if err != nil {
		logger.Error("Error initializing Telegram", zap.Error(err))
		return err
	}

	repositories, err := initialize.NewRepositories(ctx, initialize.DepsRepositories{
		MinioClient:   minioClient,
		MongoDatabase: mdb,
		HLogger:       hlogger,
		Cfg:           cfg,
	})
	if err != nil {
		logger.Error("Error initializing Repositories", zap.Error(err))
		return err
	}

	controllers := initialize.NewControllers(initialize.ControllersDeps{
		Reps:        repositories,
		RedisClient: redisClient,
		Notifier:    tgBot,
		TgChatID:    cfg.TelegramChannelID,
		HLogger:     hlogger,
		ZapLogger:   logger,
	})

	srv := http.NewServer(http.ServerConfig{
		Logger:      logger,
		Controllers: []http.Controller{controllers.Tickets, controllers.Other},
		Hlogger:     hlogger,
		MW:          mw,
	})

	go func() {
		if err := srv.Start(cfg.HTTPUrl); err != nil {
			logger.Error("Server startup error", zap.Error(err))
			cancel()
		}
	}()

	srv.ListRoutes()

	shutdownGroup.Add(closer.CloserFunc(srv.Shutdown))
	shutdownGroup.Add(closer.CloserFunc(mdb.Client().Disconnect))

	<-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) {
			logger.Error("Shutdown timed out", zap.Error(err))
		} else {
			logger.Error("Failed to shutdown services gracefully", zap.Error(err))
		}
		return err
	}

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