package model

import (
	"time"

	"gorm.io/gorm"
)

// AssignmentPolicyV2Type defines the type of assignment policy (V2).
// Reference: Chatwoot assignment_policies_controller.rb — round_robin, fair, best_skill_match
type AssignmentPolicyV2Type string

const (
	APV2TypeRoundRobin     AssignmentPolicyV2Type = "round_robin"
	APV2TypeFair           AssignmentPolicyV2Type = "fair"
	APV2TypeBestSkillMatch AssignmentPolicyV2Type = "best_skill_match"
)

// AssignmentPolicyV2 represents a V2 assignment policy for an account.
// Reference: Chatwoot app/models/assignment_policy.rb (V2 spec)
// Supports named policies with different assignment strategies, linked to inboxes via AssignmentPolicyInbox.
type AssignmentPolicyV2 struct {
	ID          uint           `gorm:"primaryKey;autoIncrement" json:"id"`
	AccountID   uint           `gorm:"not null;index;uniqueIndex:idx_apv2_account_name" json:"account_id"`
	Name        string         `gorm:"size:255;not null;uniqueIndex:idx_apv2_account_name" json:"name"`
	Description string         `gorm:"type:text" json:"description"`
	Type        AssignmentPolicyV2Type `gorm:"size:50;not null;default:round_robin" json:"type"`
	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"`
	AssignmentPolicyInboxes []AssignmentPolicyInbox `gorm:"foreignKey:AssignmentPolicyID" json:"inboxes,omitempty"`
}

func (AssignmentPolicyV2) TableName() string { return "assignment_policies_v2" }

// AssignmentPolicyInbox represents the join between AssignmentPolicyV2 and Inbox.
// Each Inbox can only be associated with one AssignmentPolicyV2.
// Reference: Chatwoot app/models/assignment_policy_inbox.rb
type AssignmentPolicyInbox struct {
	ID                 uint           `gorm:"primaryKey;autoIncrement" json:"id"`
	AssignmentPolicyID uint           `gorm:"not null;index" json:"assignment_policy_id"`
	InboxID            uint           `gorm:"not null;uniqueIndex:idx_apv2_inbox_unique" json:"inbox_id"`
	AccountID          uint           `gorm:"not null;index" json:"account_id"`
	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"`

	AssignmentPolicy AssignmentPolicyV2 `gorm:"foreignKey:AssignmentPolicyID" json:"assignment_policy,omitempty"`
	Inbox            Inbox              `gorm:"foreignKey:InboxID" json:"inbox,omitempty"`
}

func (AssignmentPolicyInbox) TableName() string { return "assignment_policy_inboxes" }