package model

import (
	"encoding/json"
	"time"

	"gorm.io/gorm"
)

// WebhookSubscription represents an account-level webhook subscription for outgoing events.
// Reference: Chatwoot webhook integration + P2B M8 spec
type WebhookSubscription struct {
	ID          uint           `gorm:"primaryKey" json:"id"`
	AccountID   uint           `gorm:"not null;index" json:"account_id"`
	URL         string         `gorm:"size:2048;not null" json:"url"`
	Events      json.RawMessage `gorm:"type:jsonb;not null" json:"events"` // JSON array of event types, e.g. ["conversation_created","message_created"]
	Secret      string         `gorm:"size:128;not null" json:"secret,omitempty"` // HMAC-SHA256 signing secret
	Active      bool           `gorm:"default:true" json:"active"`
	VerifiedAt  *time.Time     `json:"verified_at,omitempty"`
	LastDeliveryStatus string `gorm:"size:50" json:"last_delivery_status,omitempty"` // success/failed/pending
	LastDeliveryAt      *time.Time `json:"last_delivery_at,omitempty"`
	CreatedAt   time.Time      `gorm:"autoCreateTime" json:"created_at"`
	UpdatedAt   time.Time      `gorm:"autoUpdateTime" json:"updated_at"`
	DeletedAt   gorm.DeletedAt `gorm:"index" json:"deleted_at,omitempty"`

	Account Account `gorm:"foreignKey:AccountID" json:"account,omitempty"`
}

func (WebhookSubscription) TableName() string { return "webhook_subscriptions" }

// WebhookDeliveryStatus constants for delivery tracking.
const (
	WebhookDeliveryStatusPending  = "pending"
	WebhookDeliveryStatusSuccess  = "success"
	WebhookDeliveryStatusFailed   = "failed"
	WebhookDeliveryStatusRetrying = "retrying"
)

// IsEventSubscribed checks whether the subscription includes a given event type.
// The Events field is a JSON array of event type strings, e.g. ["conversation_created","message_created"].
func (s *WebhookSubscription) IsEventSubscribed(eventType string) bool {
	var events []string
	if err := json.Unmarshal(s.Events, &events); err != nil {
		return false
	}
	for _, e := range events {
		if e == eventType {
			return true
		}
	}
	return false
}

// WebhookDelivery represents a single webhook delivery attempt.
// Reference: Chatwoot webhook delivery tracking + P2B M8 spec
type WebhookDelivery struct {
	ID               uint      `gorm:"primaryKey" json:"id"`
	SubscriptionID   uint      `gorm:"not null;index" json:"subscription_id"`
	EventType        string    `gorm:"size:100;not null;index" json:"event_type"`
	Payload          json.RawMessage `gorm:"type:jsonb" json:"payload"`
	ResponseCode     int       `json:"response_code,omitempty"`
	ResponseBody     string    `gorm:"size:4096" json:"response_body,omitempty"`
	Status           string    `gorm:"size:50;not null;index" json:"status"` // success/failed/retrying
	Attempts         int       `gorm:"default:0" json:"attempts"`
	NextAttemptAt    *time.Time `json:"next_attempt_at,omitempty"`
	CreatedAt        time.Time  `gorm:"autoCreateTime" json:"created_at"`
	UpdatedAt        time.Time  `gorm:"autoUpdateTime" json:"updated_at"`

	Subscription WebhookSubscription `gorm:"foreignKey:SubscriptionID" json:"subscription,omitempty"`
}

func (WebhookDelivery) TableName() string { return "webhook_deliveries" }