package models

import (
	"time"

	"gorm.io/gorm"
)

// Ticket 工单模型
type Ticket struct {
	ID             uint           `gorm:"primaryKey;autoIncrement" json:"id"`
	TicketNumber   string         `gorm:"unique;size:50;not null;comment:工单编号" json:"ticket_number"`
	TenantID       uint           `gorm:"not null;index;comment:租户 ID" json:"tenant_id"`
	UserID         *uint          `gorm:"index;comment:用户 ID" json:"user_id"`
	Title          string         `gorm:"size:500;not null;comment:工单标题" json:"title"`
	Description    string         `gorm:"type:text;not null;comment:工单描述" json:"description"`
	Category       *string        `gorm:"size:100;comment:工单分类" json:"category"`
	Priority       string         `gorm:"default:'medium';index;comment:优先级 (low/medium/high/urgent)" json:"priority"`
	Status         string         `gorm:"default:'open';index;comment:状态 (open/pending/in_progress/resolved/closed)" json:"status"`
	AssignedTo     *uint          `gorm:"index;comment:指配给" json:"assigned_to"`
	DueDate        *time.Time     `gorm:"comment:截止日期" json:"due_date"`
	Resolution     *string        `gorm:"type:text;comment:解决方案" json:"resolution"`
	Metadata       *string        `gorm:"type:text;comment:元数据 (JSON)" json:"metadata"`
	CreatedAt      time.Time      `json:"created_at"`
	UpdatedAt      time.Time      `json:"updated_at"`
	DeletedAt      gorm.DeletedAt `gorm:"index" json:"deleted_at"`

	// 关联
	User        *User   `gorm:"foreignKey:UserID" json:"user,omitempty"`
	Assignee    *User   `gorm:"foreignKey:AssignedTo" json:"assignee,omitempty"`
	Tenat       *Tenant `gorm:"foreignKey:TenatID" json:"tenant,omitempty"`
	Messages    []TicketMessage `json:"messages,omitempty"`
	Attachments []Attachment    `json:"attachments,omitempty"`
}

// TableName 指定表名
func (Ticket) TableName() string {
	return "tickets"
}

// TicketMessage 工单消息
type TicketMessage struct {
	ID            uint       `gorm:"primaryKey;autoIncrement" json:"id"`
	TicketID      uint       `gorm:"not null;index;comment:工单 ID" json:"ticket_id"`
	UserID        uint       `gorm:"not null;comment:发送者 ID" json:"user_id"`
	Content       string     `gorm:"type:text;not null;comment:消息内容" json:"content"`
	ContentType   string     `gorm:"default:'text';comment:类型 (text/image/file)" json:"content_type"`
	ContentURL    *string    `gorm:"size:1000;comment:内容 URL" json:"content_url"`
	IsInternal    bool       `gorm:"default:false;comment:是否内部备注" json:"is_internal"`
	Metadata      *string    `gorm:"type:text;comment:元数据" json:"metadata"`
	CreatedAt     time.Time  `json:"created_at"`
	DeletedAt     gorm.DeletedAt `gorm:"index" json:"deleted_at"`

	Ticket *Ticket `gorm:"foreignKey:TicketID" json:"ticket,omitempty"`
}

// TableName 指定表名
func (TicketMessage) TableName() string {
	return "ticket_messages"
}

// Attachment 附件
type Attachment struct {
	ID          uint     `gorm:"primaryKey;autoIncrement" json:"id"`
	TenantID    uint     `gorm:"not null;index;comment:租户 ID" json:"tenant_id"`
	TicketID    uint     `gorm:"not null;index;comment:工单 ID" json:"ticket_id"`
	FileName    string   `gorm:"size:500;not null;comment:文件名" json:"file_name"`
	FileURL     string   `gorm:"not null;comment:文件 URL" json:"file_url"`
	FileSize    uint64   `gorm:"comment:文件大小 (字节)" json:"file_size"`
	MIMEType    string   `gorm:"size:100;comment:MIME 类型" json:"mime_type"`
	Description *string  `gorm:"comment:描述" json:"description"`
	CreatedAt   time.Time  `json:"created_at"`
	DeletedAt   gorm.DeletedAt `gorm:"index" json:"deleted_at"`

	Ticket *Ticket `gorm:"foreignKey:TicketID" json:"ticket,omitempty"`
}

// TableName 指定表名
func (Attachment) TableName() string {
	return "attachments"
}

// 工单状态枚举
const (
	TicketStatusOpen       = "open"
	TicketStatusPending    = "pending"
	TicketStatusInProgress = "in_progress"
	TicketStatusResolved   = "resolved"
	TicketStatusClosed     = "closed"
)

// 工单优先级枚举
const (
	TicketPriorityLow     = "low"
	TicketPriorityMedium  = "medium"
	TicketPriorityHigh    = "high"
	TicketPriorityUrgent  = "urgent"
)

// 工单分类枚举
const (
	TicketCategoryTechnical  = "technical"     // 技术问题
	TicketCategoryBug        = "bug"           // Bug 报告
	TicketCategoryFeature    = "feature"       // 功能请求
	TicketCategorySupport    = "support"       // 技术支持
	TicketCategoryBilling    = "billing"       // 计费问题
	TicketCategoryOther      = "other"         // 其他
)