package model

import (
	"time"

	"gorm.io/gorm"
)

// DeliveryStatus tracks the delivery status of a message to a specific contact via an inbox.
// Reference: Chatwoot app/models/message.rb + delivery status tracking per recipient
// Each record represents the delivery state of a single message for a specific contact/inbox pair.
// Chatwoot uses this to track whether a message was sent, delivered, read, or failed per recipient.
//
// Chatwoot compatibility notes:
//   - Routes: GET /accounts/:account_id/conversations/:conversation_id/messages/:message_id/delivery_status
//   - Status field reuses MessageStatus enum values: sent, delivered, read, failed
//   - Multiple delivery_status records can exist per message (one per contact/inbox pair)
type DeliveryStatus struct {
	ID         uint           `gorm:"primaryKey;autoIncrement" json:"id"`
	MessageID  uint           `gorm:"not null;index" json:"message_id"`
	InboxID    uint           `gorm:"not null;index" json:"inbox_id"`
	ContactID  uint           `gorm:"not null;index" json:"contact_id"`
	Status     MessageStatus  `gorm:"size:50;not null;default:'sent'" json:"status"`
	DeliveredAt *time.Time    `json:"delivered_at,omitempty"`
	ReadAt      *time.Time    `json:"read_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"`

	Message Message `gorm:"foreignKey:MessageID" json:"message,omitempty"`
	Inbox   Inbox   `gorm:"foreignKey:InboxID" json:"inbox,omitempty"`
	Contact Contact `gorm:"foreignKey:ContactID" json:"contact,omitempty"`
}

// TableName returns the database table name for DeliveryStatus.
func (DeliveryStatus) TableName() string { return "delivery_statuses" }