package model

// AccountUser represents the association between a User and an Account.
// Reference: Chatwoot app/models/account_user.rb
// Each user can belong to multiple accounts with different roles in each.
//
// This is the core RBAC association — it determines what role a user plays
// in a specific account context. The role field drives the PolicyContext construction.

import (
	"time"

	"gorm.io/gorm"
)

// AccountUser represents a user's membership in an account with a specific role.
type AccountUser struct {
	ID                    uint           `gorm:"primaryKey" json:"id"`
	UserID                uint           `gorm:"not null;uniqueIndex:idx_user_account" json:"user_id"`
	AccountID             uint           `gorm:"not null;uniqueIndex:idx_user_account" json:"account_id"`
	Role                  string         `gorm:"size:50;not null;default:'agent'" json:"role"`    // agent, administrator, custom_role
	CustomRoleID          uint           `gorm:"default:0" json:"custom_role_id,omitempty"`       // 0 means no custom role; >0 references CustomRole
	AgentCapacityPolicyID *uint          `gorm:"index" json:"agent_capacity_policy_id,omitempty"` // enterprise capacity policy assignment
	Availability          string         `gorm:"size:50;default:'offline'" json:"availability"`   // online/offline/busy
	AutoOffline           bool           `gorm:"default:true" json:"auto_offline"`                // auto-offline when idle
	ActiveAt              *time.Time     `json:"active_at,omitempty"`                             // last active timestamp in this account
	InvitedBy             uint           `gorm:"default:0" json:"invited_by"`                     // UserID of the user who invited this member
	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
	User                User                 `gorm:"foreignKey:UserID" json:"user,omitempty"`
	Account             Account              `gorm:"foreignKey:AccountID" json:"account,omitempty"`
	AgentCapacityPolicy *AgentCapacityPolicy `gorm:"foreignKey:AgentCapacityPolicyID" json:"agent_capacity_policy,omitempty"`
}

func (AccountUser) TableName() string { return "account_users" }

// IsAdministrator returns true if the AccountUser has administrator role.
func (au *AccountUser) IsAdministrator() bool {
	return au.Role == "administrator"
}

// IsAgent returns true if the AccountUser has agent role.
func (au *AccountUser) IsAgent() bool {
	return au.Role == "agent"
}

// HasCustomRole returns true if the AccountUser has a custom enterprise role.
func (au *AccountUser) HasCustomRole() bool {
	return au.Role == "custom_role" && au.CustomRoleID > 0
}

// IsOnline returns true if the agent availability is "online".
func (au *AccountUser) IsOnline() bool {
	return au.Availability == "online"
}