package model

import (
	"encoding/json"
	"time"
)

// NotificationSubscriptionType represents the subscription type enum.
// Reference: Chatwoot SUBSCRIPTION_TYPES = { browser_push: 1, fcm: 2 }
type NotificationSubscriptionType int

const (
	NotificationSubBrowserPush NotificationSubscriptionType = 1
	NotificationSubFCM         NotificationSubscriptionType = 2
)

// NotificationSubscription represents a user's push notification subscription.
// Reference: Chatwoot app/models/notification_subscription.rb
// Table: notification_subscriptions
// Columns: id, identifier(text), subscription_attributes(jsonb), subscription_type(int), user_id(bigint), created_at, updated_at
type NotificationSubscription struct {
	ID                  uint                       `gorm:"primaryKey" json:"id"`
	Identifier          string                     `gorm:"type:text;uniqueIndex:idx_notification_subscriptions_on_identifier;not null" json:"identifier"`
	SubscriptionAttributes json.RawMessage          `gorm:"type:jsonb;not null" json:"subscription_attributes"`
	SubscriptionType    NotificationSubscriptionType `gorm:"not null" json:"subscription_type"`
	UserID              uint                       `gorm:"not null;index:idx_notification_subscriptions_on_user_id" json:"user_id"`
	CreatedAt           time.Time                  `gorm:"autoCreateTime" json:"created_at"`
	UpdatedAt           time.Time                  `gorm:"autoUpdateTime" json:"updated_at"`

	User *User `gorm:"foreignKey:UserID" json:"user,omitempty"`
}

func (NotificationSubscription) TableName() string { return "notification_subscriptions" }

// String returns the string representation of the subscription type.
func (t NotificationSubscriptionType) String() string {
	switch t {
	case NotificationSubBrowserPush:
		return "browser_push"
	case NotificationSubFCM:
		return "fcm"
	default:
		return "unknown"
	}
}

// NotificationSubscriptionTypeFromString parses a subscription type from string.
func NotificationSubscriptionTypeFromString(s string) NotificationSubscriptionType {
	switch s {
	case "browser_push":
		return NotificationSubBrowserPush
	case "fcm":
		return NotificationSubFCM
	default:
		return 0
	}
}