package models

import (
	"time"
	"github.com/lifei6671/godoc/conf"
	"github.com/astaxie/beego/orm"
	"errors"
)

//Comment struct
type Comment struct {
	CommentId int			`orm:"pk;auto;unique;column(comment_id)" json:"comment_id"`
	Floor int 			`orm:"column(floor);type(unsigned);default(0)" json:"floor"`
	BookId int			`orm:"column(book_id);type(int)" json:"book_id"`
	// DocumentId 评论所属的文档.
	DocumentId int			`orm:"column(document_id);type(int)" json:"document_id"`
	// Author 评论作者.
	Author string			`orm:"column(author);size(100)" json:"author"`
	//MemberId 评论用户ID.
	MemberId int			`orm:"column(member_id);type(int)" json:"member_id"`
	// IPAddress 评论者的IP地址
	IPAddress string		`orm:"column(ip_address);size(100)" json:"ip_address"`
	// 评论日期.
	CommentDate time.Time		`orm:"type(datetime);column(comment_date);auto_now_add" json:"comment_date"`
	//Content 评论内容.
	Content string			`orm:"column(content);size(2000)" json:"content"`
	// Approved 评论状态：0 待审核/1 已审核/2 垃圾评论/ 3 已删除
	Approved int			`orm:"column(approved);type(int)" json:"approved"`
	// UserAgent 评论者浏览器内容
	UserAgent string		`orm:"column(user_agent);size(500)" json:"user_agent"`
	// Parent 评论所属父级
	ParentId int			`orm:"column(parent_id);type(int);default(0)" json:"parent_id"`
	AgreeCount int			`orm:"column(agree_count);type(int);default(0)" json:"agree_count"`
	AgainstCount int		`orm:"column(against_count);type(int);default(0)" json:"against_count"`
}

// TableName 获取对应数据库表名.
func (m *Comment) TableName() string {
	return "comments"
}
// TableEngine 获取数据使用的引擎.
func (m *Comment) TableEngine() string {
	return "INNODB"
}

func (m *Comment) TableNameWithPrefix() string  {
	return conf.GetDatabasePrefix() + m.TableName()
}

func NewComment() *Comment {
	return &Comment{}
}
func (m *Comment) Find(id int) (*Comment,error) {
	if id <= 0 {
		return m,ErrInvalidParameter
	}
	o := orm.NewOrm()
	err :=  o.Read(m)

	return m,err
}

func (m *Comment) Update(cols... string)  error {
	o := orm.NewOrm()

	_,err := o.Update(m,cols...)

	return err
}

//Insert 添加一条评论.
func (m *Comment) Insert() error {
	if m.DocumentId <= 0{
		return errors.New("评论文档不存在")
	}
	if m.Content == "" {
		return ErrCommentContentNotEmpty
	}

	o := orm.NewOrm()

	if m.CommentId > 0 {
		comment := NewComment()
		//如果父评论不存在
		if err := o.Read(comment); err != nil {
			return err
		}
	}

	document := NewDocument()
	//如果评论的文档不存在
	if _,err := document.Find(m.DocumentId); err != nil {
		return err
	}
	book ,err := NewBook().Find(document.BookId);
	//如果评论的项目不存在
	if err != nil {
		return err
	}
	//如果已关闭评论
	if book.CommentStatus == "closed"{
		return ErrCommentClosed
	}
	if book.CommentStatus == "registered_only" && m.MemberId <= 0{
		return ErrPermissionDenied
	}
	//如果仅参与者评论
	if book.CommentStatus == "group_only" {
		if m.MemberId <= 0{
			return ErrPermissionDenied
		}
		rel := NewRelationship()
		if _,err := rel.FindForRoleId(book.BookId,m.MemberId);err != nil {
			return ErrPermissionDenied
		}
	}

	if m.MemberId > 0 {
		member := NewMember()
		//如果用户不存在
		if err := member.Find(m.MemberId) ; err != nil {
			return ErrMemberNoExist
		}
		//如果用户被禁用
		if member.Status == 1 {
			return ErrMemberDisabled
		}
	}else if m.Author == "" {
		m.Author = "[匿名用户]"
	}
	m.BookId = book.BookId
	_,err = o.Insert(m)

	return err
}