package user

import (
	"context"
	"fmt"

	"github.com/perfect-panel/server/internal/config"
	"github.com/perfect-panel/server/internal/model/user"
	"github.com/perfect-panel/server/internal/svc"
	"github.com/perfect-panel/server/internal/types"
	"github.com/perfect-panel/server/pkg/constant"
	"github.com/perfect-panel/server/pkg/logger"
	"github.com/perfect-panel/server/pkg/xerr"
	"github.com/pkg/errors"
	"gorm.io/gorm"
)

type UnbindDeviceLogic struct {
	logger.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

// Unbind Device
func NewUnbindDeviceLogic(ctx context.Context, svcCtx *svc.ServiceContext) *UnbindDeviceLogic {
	return &UnbindDeviceLogic{
		Logger: logger.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *UnbindDeviceLogic) UnbindDevice(req *types.UnbindDeviceRequest) error {
	userInfo, ok := l.ctx.Value(constant.CtxKeyUser).(*user.User)
	if !ok {
		return errors.Wrapf(xerr.NewErrCode(xerr.InvalidAccess), "Invalid Access")
	}

	device, err := l.svcCtx.UserModel.FindOneDevice(l.ctx, req.Id)
	if err != nil {
		return errors.Wrapf(xerr.NewErrCode(xerr.DeviceNotExist), "find device")
	}

	if device.UserId != userInfo.Id {
		return errors.Wrapf(xerr.NewErrCode(xerr.InvalidParams), "device not belong to user")
	}

	currentSessionID, _ := l.ctx.Value(constant.CtxKeySessionID).(string)
	return l.logoutUnbind(userInfo, device, currentSessionID)
}

func (l *UnbindDeviceLogic) logoutUnbind(userInfo *user.User, device *user.Device, currentSessionID string) error {
	err := l.svcCtx.DB.Transaction(func(tx *gorm.DB) error {
		exitHelper := newFamilyExitHelper(l.ctx, l.svcCtx)
		return exitHelper.removeUserFromActiveFamily(tx, userInfo.Id, true)
	})
	if err != nil {
		return err
	}

	l.svcCtx.DeviceManager.KickDevice(device.UserId, device.Identifier)

	if currentSessionID != "" {
		sessionIdCacheKey := fmt.Sprintf("%v:%v", config.SessionIdKey, currentSessionID)
		_ = l.svcCtx.Redis.Del(l.ctx, sessionIdCacheKey).Err()

		sessionsKey := fmt.Sprintf("%s%v", config.UserSessionsKeyPrefix, userInfo.Id)
		_ = l.svcCtx.Redis.ZRem(l.ctx, sessionsKey, currentSessionID).Err()
	}

	deviceCacheKey := fmt.Sprintf("%v:%v", config.DeviceCacheKeyKey, device.Identifier)
	if sessionId, redisErr := l.svcCtx.Redis.Get(l.ctx, deviceCacheKey).Result(); redisErr == nil && sessionId == currentSessionID {
		_ = l.svcCtx.Redis.Del(l.ctx, deviceCacheKey).Err()
	}

	if clearErr := l.svcCtx.UserModel.ClearUserCache(l.ctx, userInfo); clearErr != nil {
		l.Errorw("clear user cache failed", logger.Field("user_id", userInfo.Id), logger.Field("error", clearErr.Error()))
	}

	return nil
}