package model

import (
	"encoding/json"
	"time"

	"gorm.io/gorm"
)

// PlatformApp represents a platform-level application (partner API / agent bot / integration)
// that authenticates via AccessToken and operates within specific accounts.
// Reference: Chatwoot app/models/platform_app.rb + app/models/agent_bot.rb + P2B M12 spec
//
// PlatformApps are used for:
// - API-based integrations (webhooks, CRM sync, etc.)
// - Agent bots that automate conversation handling
// - Third-party applications that need API access to GoChat
//
// Authentication: PlatformApps use AccessToken authentication (AccessTokenable concern).
// The token is auto-created on PlatformApp creation and rotated via regenerate endpoints.
// Corresponds to Chatwoot's AccessTokenable concern for agent bots / platform apps.

// PlatformApp represents a platform application with AccessToken authentication.
type PlatformApp struct {
	ID          uint           `gorm:"primaryKey;autoIncrement" json:"id"`
	Name        string         `gorm:"size:255;not null" json:"name"`
	Description string         `gorm:"type:text" json:"description,omitempty"`
	Icon        string         `gorm:"size:255" json:"icon,omitempty"`
	URL         string         `gorm:"size:512" json:"url,omitempty"`
	Config      json.RawMessage `gorm:"type:jsonb;default:'{}';serializer:json" json:"config,omitempty"`
	Active      *bool          `gorm:"default:true;not null" json:"active"`
	AccountID   *uint          `gorm:"index" json:"account_id,omitempty"` // nil = platform-level (no account restriction)
	Type        string         `gorm:"size:50;default:'api'" json:"type"`  // api, agent_bot, integration
	Status      string         `gorm:"size:50;default:'active'" json:"status"` // active, disabled
	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"`

	// Relations
	Account     Account        `gorm:"foreignKey:AccountID" json:"account,omitempty"`
	Permissibles []Permissible `gorm:"foreignKey:PlatformAppID" json:"permissibles,omitempty"`
	AccessToken  *AccessToken  `gorm:"foreignKey:OwnerID;conditions:owner_type='PlatformApp'" json:"access_token,omitempty"`
}

func (PlatformApp) TableName() string { return "platform_apps" }

// IsPlatformLevel returns true if this app is not restricted to any account (AccountID is nil).
func (a *PlatformApp) IsPlatformLevel() bool {
	return a.AccountID == nil
}

// IsActive returns true if the app is both Active and Status=active.
func (a *PlatformApp) IsActive() bool {
	return a.Active != nil && *a.Active && a.Status == "active"
}