package httpserver

import (
	dbgen "Yimaru-Backend/gen/db"
	"Yimaru-Backend/internal/config"
	activitylogservice "Yimaru-Backend/internal/services/activity_log"
	"Yimaru-Backend/internal/services/arifpay"
	"Yimaru-Backend/internal/services/assessment"
	"Yimaru-Backend/internal/services/authentication"
	cloudconvertservice "Yimaru-Backend/internal/services/cloudconvert"
	"Yimaru-Backend/internal/services/course_management"
	minioservice "Yimaru-Backend/internal/services/minio"
	issuereporting "Yimaru-Backend/internal/services/issue_reporting"
	notificationservice "Yimaru-Backend/internal/services/notification"
	"Yimaru-Backend/internal/services/questions"
	ratingsservice "Yimaru-Backend/internal/services/ratings"
	rbacservice "Yimaru-Backend/internal/services/rbac"
	"Yimaru-Backend/internal/services/recommendation"
	"Yimaru-Backend/internal/services/subscriptions"
	"Yimaru-Backend/internal/services/team"
	vimeoservice "Yimaru-Backend/internal/services/vimeo"

	"Yimaru-Backend/internal/services/settings"
	"Yimaru-Backend/internal/services/transaction"
	"Yimaru-Backend/internal/services/user"
	jwtutil "Yimaru-Backend/internal/web_server/jwt"
	customvalidator "Yimaru-Backend/internal/web_server/validator"
	"context"
	"fmt"
	"log/slog"
	"time"

	"go.uber.org/zap"

	"github.com/bytedance/sonic"
	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/fiber/v2/middleware/cors"
)

type App struct {
	assessmentSvc     *assessment.Service
	courseSvc         *course_management.Service
	questionsSvc      *questions.Service
	subscriptionsSvc  *subscriptions.Service
	arifpaySvc        *arifpay.ArifpayService
	issueReportingSvc *issuereporting.Service
	vimeoSvc          *vimeoservice.Service
	teamSvc           *team.Service
	activityLogSvc    *activitylogservice.Service
	cloudConvertSvc   *cloudconvertservice.Service
	minioSvc          *minioservice.Service
	ratingSvc         *ratingsservice.Service
	fiber             *fiber.App
	recommendationSvc recommendation.RecommendationService
	cfg               *config.Config
	logger            *slog.Logger
	NotidicationStore *notificationservice.Service
	port              int
	settingSvc        *settings.Service
	authSvc           *authentication.Service
	userSvc           *user.Service
	transactionSvc    *transaction.Service
	validator         *customvalidator.CustomValidator
	JwtConfig         jwtutil.JwtConfig
	Logger            *slog.Logger
	mongoLoggerSvc    *zap.Logger
	analyticsDB       *dbgen.Queries
	rbacSvc           *rbacservice.Service
	stopPurgeWorker   context.CancelFunc
}

func NewApp(
	assessmentSvc *assessment.Service,
	courseSvc *course_management.Service,
	questionsSvc *questions.Service,
	subscriptionsSvc *subscriptions.Service,
	arifpaySvc *arifpay.ArifpayService,
	issueReportingSvc *issuereporting.Service,
	vimeoSvc *vimeoservice.Service,
	teamSvc *team.Service,
	activityLogSvc *activitylogservice.Service,
	cloudConvertSvc *cloudconvertservice.Service,
	minioSvc *minioservice.Service,
	ratingSvc *ratingsservice.Service,
	port int, validator *customvalidator.CustomValidator,
	settingSvc *settings.Service,
	authSvc *authentication.Service,
	logger *slog.Logger,
	JwtConfig jwtutil.JwtConfig,
	userSvc *user.Service,
	transactionSvc *transaction.Service,
	notidicationStore *notificationservice.Service,
	recommendationSvc recommendation.RecommendationService,
	cfg *config.Config,
	mongoLoggerSvc *zap.Logger,
	analyticsDB *dbgen.Queries,
	rbacSvc *rbacservice.Service,
) *App {
	app := fiber.New(fiber.Config{
		CaseSensitive:            true,
		DisableHeaderNormalizing: true,
		JSONEncoder:              sonic.Marshal,
		JSONDecoder:              sonic.Unmarshal,
		BodyLimit:                500 * 1024 * 1024, // 500 MB
	})

	app.Use(cors.New(cors.Config{
		AllowOrigins: "*",
		AllowMethods: "GET,POST,PUT,PATCH,DELETE,OPTIONS",
		AllowHeaders: "Content-Type,Authorization,platform",
		// AllowCredentials: true,
	}))

	app.Static("/static", "./static")

	s := &App{
		assessmentSvc:     assessmentSvc,
		courseSvc:         courseSvc,
		questionsSvc:      questionsSvc,
		subscriptionsSvc:  subscriptionsSvc,
		arifpaySvc:        arifpaySvc,
		vimeoSvc:          vimeoSvc,
		teamSvc:           teamSvc,
		activityLogSvc:    activityLogSvc,
		cloudConvertSvc:   cloudConvertSvc,
		minioSvc:          minioSvc,
		ratingSvc:         ratingSvc,
		issueReportingSvc: issueReportingSvc,
		fiber:             app,
		port:              port,
		settingSvc:        settingSvc,
		authSvc:           authSvc,
		validator:         validator,
		logger:            logger,
		JwtConfig:         JwtConfig,
		userSvc:           userSvc,
		transactionSvc:    transactionSvc,
		NotidicationStore: notidicationStore,
		Logger:            logger,
		recommendationSvc: recommendationSvc,
		cfg:               cfg,
		mongoLoggerSvc:    mongoLoggerSvc,
		analyticsDB:       analyticsDB,
		rbacSvc:           rbacSvc,
	}

	s.initAppRoutes()

	return s
}

func (a *App) Run() error {
	a.startAccountDeletionPurgeWorker()
	defer a.stopAccountDeletionPurgeWorker()
	return a.fiber.Listen(fmt.Sprintf(":%d", a.port))
}

func (a *App) startAccountDeletionPurgeWorker() {
	if a.cfg == nil || !a.cfg.AccountDeletionPurgeEnabled {
		a.logger.Info("account deletion purge worker disabled")
		return
	}

	interval := a.cfg.AccountDeletionPurgeInterval
	if interval <= 0 {
		interval = time.Hour
	}

	batchSize := a.cfg.AccountDeletionPurgeBatchSize
	if batchSize <= 0 {
		batchSize = 100
	}

	ctx, cancel := context.WithCancel(context.Background())
	a.stopPurgeWorker = cancel

	a.logger.Info(
		"starting account deletion purge worker",
		"interval", interval.String(),
		"batch_size", batchSize,
	)

	go func() {
		// Run once on startup so stale due rows are cleaned quickly.
		a.runAccountDeletionPurgeOnce(ctx, batchSize)

		ticker := time.NewTicker(interval)
		defer ticker.Stop()

		for {
			select {
			case <-ctx.Done():
				a.logger.Info("account deletion purge worker stopped")
				return
			case <-ticker.C:
				a.runAccountDeletionPurgeOnce(ctx, batchSize)
			}
		}
	}()
}

func (a *App) stopAccountDeletionPurgeWorker() {
	if a.stopPurgeWorker != nil {
		a.stopPurgeWorker()
	}
}

func (a *App) runAccountDeletionPurgeOnce(ctx context.Context, batchSize int32) {
	deletedCount, err := a.userSvc.PurgeDueUserDeletions(ctx, batchSize)
	if err != nil {
		a.logger.Error("account deletion purge run failed", "error", err)
		return
	}

	if deletedCount > 0 {
		a.logger.Info("account deletion purge run completed", "deleted_count", deletedCount, "batch_size", batchSize)
	}
}