package model

import (
	"encoding/json"
	"time"

	"gorm.io/gorm"
)

// CopilotThread represents an AI copilot conversation thread.
// Reference: P2B M10 spec
type CopilotThread struct {
	ID          uint           `gorm:"primaryKey" json:"id"`
	AccountID   uint           `gorm:"not null;index" json:"account_id"`
	UserID      uint           `gorm:"not null;index" json:"user_id"`
	ConversationID *uint       `gorm:"index" json:"conversation_id,omitempty"`
	Title       string         `gorm:"size:255" json:"title"`
	Status      string         `gorm:"size:50;default:'active'" json:"status"` // active/archived
	Metadata    json.RawMessage `gorm:"type:jsonb" json:"metadata"`
	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"`
	User         User            `gorm:"foreignKey:UserID" json:"user,omitempty"`
	Conversation *Conversation   `gorm:"foreignKey:ConversationID" json:"conversation,omitempty"`
	Messages     []CopilotMessage `gorm:"foreignKey:ThreadID" json:"messages,omitempty"`
}

func (CopilotThread) TableName() string { return "copilot_threads" }