package models

import (
	"time"

	"fmt"
	"github.com/astaxie/beego"
	"github.com/astaxie/beego/logs"
	"github.com/astaxie/beego/orm"
	"github.com/lifei6671/mindoc/conf"
	"os"
	"path/filepath"
	"strconv"
	"crypto/md5"
	"io"
	"errors"
	"github.com/lifei6671/mindoc/utils/filetil"
	"github.com/lifei6671/mindoc/utils/ziptil"
	"strings"
	"regexp"
	"io/ioutil"
	"github.com/lifei6671/mindoc/utils/cryptil"
	"github.com/lifei6671/mindoc/utils/requests"
	"gopkg.in/russross/blackfriday.v2"
)

// Book struct .
type Book struct {
	BookId int `orm:"pk;auto;unique;column(book_id)" json:"book_id"`
	// BookName 项目名称.
	BookName string `orm:"column(book_name);size(500)" json:"book_name"`
	// Identify 项目唯一标识.
	Identify string `orm:"column(identify);size(100);unique" json:"identify"`
	//是否是自动发布 0 否/1 是
	AutoRelease int `orm:"column(auto_release);type(int);default(0)" json:"auto_release"`
	//是否开启下载功能 0 是/1 否
	IsDownload int `orm:"column(is_download);type(int);default(0)" json:"is_download"`
	OrderIndex  int `orm:"column(order_index);type(int);default(0)" json:"order_index"`
	// Description 项目描述.
	Description string `orm:"column(description);size(2000)" json:"description"`
	//发行公司
	Publisher string `orm:"column(publisher);size(500)" json:"publisher"`
	Label        string `orm:"column(label);size(500)" json:"label"`
	// PrivatelyOwned 项目私有： 0 公开/ 1 私有
	PrivatelyOwned int `orm:"column(privately_owned);type(int);default(0)" json:"privately_owned"`
	// 当项目是私有时的访问Token.
	PrivateToken string `orm:"column(private_token);size(500);null" json:"private_token"`
	//状态：0 正常/1 已删除
	Status int `orm:"column(status);type(int);default(0)" json:"status"`
	//默认的编辑器.
	Editor string `orm:"column(editor);size(50)" json:"editor"`
	// DocCount 包含文档数量.
	DocCount int `orm:"column(doc_count);type(int)" json:"doc_count"`
	// CommentStatus 评论设置的状态:open 为允许所有人评论，closed 为不允许评论, group_only 仅允许参与者评论 ,registered_only 仅允许注册者评论.
	CommentStatus string `orm:"column(comment_status);size(20);default(open)" json:"comment_status"`
	CommentCount  int    `orm:"column(comment_count);type(int)" json:"comment_count"`
	//封面地址
	Cover string `orm:"column(cover);size(1000)" json:"cover"`
	//主题风格
	Theme string `orm:"column(theme);size(255);default(default)" json:"theme"`
	// CreateTime 创建时间 .
	CreateTime time.Time `orm:"type(datetime);column(create_time);auto_now_add" json:"create_time"`
	//每个文档保存的历史记录数量，0 为不限制
	HistoryCount int	 `orm:"column(history_count);type(int);default(0)" json:"history_count"`
	//是否启用分享，0启用/1不启用
	IsEnableShare int `orm:"column(is_enable_share);type(int);default(0)" json:"is_enable_share"`
	MemberId   int       `orm:"column(member_id);size(100)" json:"member_id"`
	ModifyTime time.Time `orm:"type(datetime);column(modify_time);null;auto_now" json:"modify_time"`
	Version    int64     `orm:"type(bigint);column(version)" json:"version"`
	//是否使用第一篇文章项目为默认首页,0 否/1 是
	IsUseFirstDocument int `orm:"column(is_use_first_document);type(int);default(0)" json:"is_use_first_document"`
}

// TableName 获取对应数据库表名.
func (m *Book) TableName() string {
	return "books"
}

// TableEngine 获取数据使用的引擎.
func (m *Book) TableEngine() string {
	return "INNODB"
}
func (m *Book) TableNameWithPrefix() string {
	return conf.GetDatabasePrefix() + m.TableName()
}

func NewBook() *Book {
	return &Book{}
}

//添加一个项目
func (m *Book) Insert() error {
	o := orm.NewOrm()
	//	o.Begin()

	_, err := o.Insert(m)

	if err == nil {
		if m.Label != "" {
			NewLabel().InsertOrUpdateMulti(m.Label)
		}

		relationship := NewRelationship()
		relationship.BookId = m.BookId
		relationship.RoleId = 0
		relationship.MemberId = m.MemberId
		err = relationship.Insert()
		if err != nil {
			logs.Error("插入项目与用户关联 => ", err)
			//o.Rollback()
			return err
		}
		document := NewDocument()
		document.BookId = m.BookId
		document.DocumentName = "空白文档"
		document.MemberId = m.MemberId
		err = document.InsertOrUpdate()
		if err != nil {
			//o.Rollback()
			return err
		}
		//o.Commit()
		return nil
	}
	//o.Rollback()
	return err
}

func (m *Book) Find(id int) (*Book, error) {
	if id <= 0 {
		return m, ErrInvalidParameter
	}
	o := orm.NewOrm()

	err := o.QueryTable(m.TableNameWithPrefix()).Filter("book_id", id).One(m)

	return m, err
}
//更新一个项目
func (m *Book) Update(cols ...string) error {
	o := orm.NewOrm()

	temp := NewBook()
	temp.BookId = m.BookId

	if err := o.Read(temp); err != nil {
		return err
	}

	if m.Label != "" || temp.Label != ""{

		go NewLabel().InsertOrUpdateMulti(m.Label + "," + temp.Label)
	}

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

//根据指定字段查询结果集.
func (m *Book) FindByField(field string, value interface{}) ([]*Book, error) {
	o := orm.NewOrm()

	var books []*Book
	_, err := o.QueryTable(m.TableNameWithPrefix()).Filter(field, value).All(&books)

	return books, err
}

//根据指定字段查询一个结果.
func (m *Book) FindByFieldFirst(field string, value interface{}) (*Book, error) {
	o := orm.NewOrm()

	err := o.QueryTable(m.TableNameWithPrefix()).Filter(field, value).One(m)

	return m, err

}

//根据项目标识查询项目
func (m *Book) FindByIdentify(identify string) (*Book, error) {
	o := orm.NewOrm()

	err := o.QueryTable(m.TableNameWithPrefix()).Filter("identify", identify).One(m)

	return m, err
}

//分页查询指定用户的项目
func (m *Book) FindToPager(pageIndex, pageSize, memberId int) (books []*BookResult, totalCount int, err error) {

	relationship := NewRelationship()

	o := orm.NewOrm()

	sql1 := "SELECT COUNT(book.book_id) AS total_count FROM " + m.TableNameWithPrefix() + " AS book LEFT JOIN " +
		relationship.TableNameWithPrefix() + " AS rel ON book.book_id=rel.book_id AND rel.member_id = ? WHERE rel.relationship_id > 0 "

	err = o.Raw(sql1, memberId).QueryRow(&totalCount)

	if err != nil {
		return
	}

	offset := (pageIndex - 1) * pageSize

	sql2 := "SELECT book.*,rel.member_id,rel.role_id,m.account as create_name FROM " + m.TableNameWithPrefix() + " AS book" +
		" LEFT JOIN " + relationship.TableNameWithPrefix() + " AS rel ON book.book_id=rel.book_id AND rel.member_id = ?" +
		" LEFT JOIN " + relationship.TableNameWithPrefix() + " AS rel1 ON book.book_id=rel1.book_id  AND rel1.role_id=0" +
		" LEFT JOIN " + NewMember().TableNameWithPrefix() + " AS m ON rel1.member_id=m.member_id " +
		" WHERE rel.relationship_id > 0 ORDER BY book.order_index DESC,book.book_id DESC LIMIT " + fmt.Sprintf("%d,%d", offset, pageSize)

	_, err = o.Raw(sql2, memberId).QueryRows(&books)
	if err != nil {
		logs.Error("分页查询项目列表 => ", err)
		return
	}
	sql := "SELECT m.account,doc.modify_time FROM md_documents AS doc LEFT JOIN md_members AS m ON doc.modify_at=m.member_id WHERE book_id = ? LIMIT 1 ORDER BY doc.modify_time DESC"

	if err == nil && len(books) > 0 {
		for index, book := range books {
			var text struct {
				Account    string
				ModifyTime time.Time
			}

			err1 := o.Raw(sql, book.BookId).QueryRow(&text)
			if err1 == nil {
				books[index].LastModifyText = text.Account + " 于 " + text.ModifyTime.Format("2006-01-02 15:04:05")
			}
			if book.RoleId == 0 {
				book.RoleName = "创始人"
			} else if book.RoleId == 1 {
				book.RoleName = "管理员"
			} else if book.RoleId == 2 {
				book.RoleName = "编辑者"
			} else if book.RoleId == 3 {
				book.RoleName = "观察者"
			}
		}
	}
	return
}

// 彻底删除项目.
func (m *Book) ThoroughDeleteBook(id int) error {
	if id <= 0 {
		return ErrInvalidParameter
	}
	o := orm.NewOrm()

	m,err := m.Find(id);
	if err != nil {
		return err
	}
	o.Begin()

	sql2 := "DELETE FROM " + NewDocument().TableNameWithPrefix() + " WHERE book_id = ?"

	_, err = o.Raw(sql2, m.BookId).Exec()

	if err != nil {
		o.Rollback()
		return err
	}
	sql3 := "DELETE FROM " + m.TableNameWithPrefix() + " WHERE book_id = ?"

	_, err = o.Raw(sql3, m.BookId).Exec()

	if err != nil {
		o.Rollback()
		return err
	}
	sql4 := "DELETE FROM " + NewRelationship().TableNameWithPrefix() + " WHERE book_id = ?"

	_, err = o.Raw(sql4, m.BookId).Exec()

	if err != nil {
		o.Rollback()
		return err
	}

	if m.Label != "" {
		NewLabel().InsertOrUpdateMulti(m.Label)
	}

	os.RemoveAll(filepath.Join(conf.WorkingDirectory,"uploads","books",strconv.Itoa(id)))

	return o.Commit()

}

//分页查找系统首页数据.
func (m *Book) FindForHomeToPager(pageIndex, pageSize, member_id int) (books []*BookResult, totalCount int, err error) {
	o := orm.NewOrm()

	offset := (pageIndex - 1) * pageSize
	//如果是登录用户
	if member_id > 0 {
		sql1 := "SELECT COUNT(*) FROM md_books AS book LEFT JOIN md_relationship AS rel ON rel.book_id = book.book_id AND rel.member_id = ? WHERE relationship_id > 0 OR book.privately_owned = 0"

		err = o.Raw(sql1, member_id).QueryRow(&totalCount)
		if err != nil {
			return
		}
		sql2 := `SELECT book.*,rel1.*,member.account AS create_name,member.real_name FROM md_books AS book
			LEFT JOIN md_relationship AS rel ON rel.book_id = book.book_id AND rel.member_id = ?
			LEFT JOIN md_relationship AS rel1 ON rel1.book_id = book.book_id AND rel1.role_id = 0
			LEFT JOIN md_members AS member ON rel1.member_id = member.member_id
			WHERE rel.relationship_id > 0 OR book.privately_owned = 0 ORDER BY order_index DESC ,book.book_id DESC LIMIT ?,?`

		_, err = o.Raw(sql2, member_id, offset, pageSize).QueryRows(&books)

	} else {
		count, err1 := o.QueryTable(m.TableNameWithPrefix()).Filter("privately_owned", 0).Count()

		if err1 != nil {
			err = err1
			return
		}
		totalCount = int(count)

		sql := `SELECT book.*,rel.*,member.account AS create_name,member.real_name FROM md_books AS book
			LEFT JOIN md_relationship AS rel ON rel.book_id = book.book_id AND rel.role_id = 0
			LEFT JOIN md_members AS member ON rel.member_id = member.member_id
			WHERE book.privately_owned = 0 ORDER BY order_index DESC ,book.book_id DESC LIMIT ?,?`

		_, err = o.Raw(sql, offset, pageSize).QueryRows(&books)

	}

	return

}

//分页全局搜索.
func (m *Book) FindForLabelToPager(keyword string, pageIndex, pageSize, memberId int) (books []*BookResult, totalCount int, err error) {
	o := orm.NewOrm()

	keyword = "%" + keyword + "%"
	offset := (pageIndex - 1) * pageSize
	//如果是登录用户
	if memberId > 0 {
		sql1 := "SELECT COUNT(*) FROM md_books AS book LEFT JOIN md_relationship AS rel ON rel.book_id = book.book_id AND rel.member_id = ? WHERE (relationship_id > 0 OR book.privately_owned = 0) AND book.label LIKE ?"

		err = o.Raw(sql1, memberId, keyword).QueryRow(&totalCount)
		if err != nil {
			return
		}
		sql2 := `SELECT book.*,rel1.*,member.account AS create_name FROM md_books AS book
			LEFT JOIN md_relationship AS rel ON rel.book_id = book.book_id AND rel.member_id = ?
			LEFT JOIN md_relationship AS rel1 ON rel1.book_id = book.book_id AND rel1.role_id = 0
			LEFT JOIN md_members AS member ON rel1.member_id = member.member_id
			WHERE (rel.relationship_id > 0 OR book.privately_owned = 0) AND book.label LIKE ? ORDER BY order_index DESC ,book.book_id DESC LIMIT ?,?`

		_, err = o.Raw(sql2, memberId, keyword, offset, pageSize).QueryRows(&books)

		return

	} else {
		count, err1 := o.QueryTable(NewBook().TableNameWithPrefix()).Filter("privately_owned", 0).Filter("label__icontains", keyword).Count()

		if err1 != nil {
			err = err1
			return
		}
		totalCount = int(count)

		sql := `SELECT book.*,rel.*,member.account AS create_name FROM md_books AS book
			LEFT JOIN md_relationship AS rel ON rel.book_id = book.book_id AND rel.role_id = 0
			LEFT JOIN md_members AS member ON rel.member_id = member.member_id
			WHERE book.privately_owned = 0 AND book.label LIKE ? ORDER BY order_index DESC ,book.book_id DESC LIMIT ?,?`

		_, err = o.Raw(sql, keyword, offset, pageSize).QueryRows(&books)

		return

	}
}

//重置文档数量
func (m *Book) ResetDocumentNumber(bookId int) {
	o := orm.NewOrm()

	totalCount, err := o.QueryTable(NewDocument().TableNameWithPrefix()).Filter("book_id", bookId).Count()
	if err == nil {
		o.Raw("UPDATE md_books SET doc_count = ? WHERE book_id = ?", int(totalCount), bookId).Exec()
	} else {
		beego.Error(err)
	}
}

func (book *Book)ImportBook(zipPath string) error {
	if !filetil.FileExists(zipPath) {
		return  errors.New("文件不存在 => " + zipPath)
	}


	w := md5.New()
	io.WriteString(w, zipPath)                    //将str写入到w中
	io.WriteString(w, time.Now().String())
	io.WriteString(w,book.BookName)
	md5str := fmt.Sprintf("%x", w.Sum(nil)) //w.Sum(nil)将w的hash转成[]byte格式

	tempPath := strings.Replace(filepath.Join(os.TempDir(), md5str),"\\","/",-1)

	os.MkdirAll(tempPath, 0766)
	//如果加压缩失败
	if err := ziptil.Unzip(zipPath,tempPath);err != nil {
		return err
	}


	err := filepath.Walk(tempPath, func(path string, info os.FileInfo, err error) error {
		path = strings.Replace(path,"\\","/",-1)
		if path == tempPath {
			return nil
		}
		if !info.IsDir() {
			ext := filepath.Ext(info.Name())
			if strings.EqualFold(ext ,".md") || strings.EqualFold(ext , ".markdown" ) {
				doc := NewDocument()
				doc.BookId = book.BookId
				docIdentify := strings.Replace(strings.TrimPrefix(path, tempPath+"/"), "/", "-", -1)

				if ok, err := regexp.MatchString(`[a-z]+[a-zA-Z0-9_.\-]*$`, docIdentify); !ok || err != nil {
					docIdentify = "import-" + docIdentify
				}

				doc.Identify = docIdentify

				re := regexp.MustCompile(`!\[(.*?)\]\((.*?)\)`)
				markdown, err := ioutil.ReadFile(path);
				if err != nil {
					return err
				}
				doc.Markdown = re.ReplaceAllStringFunc(string(markdown), func(image string) string {

					images := re.FindAllSubmatch([]byte(image), -1);
					if len(images) <= 0 || len(images[0]) < 3 {
						return image
					}
					originalImageUrl :=  string(images[0][2])
					imageUrl := strings.Replace(string(originalImageUrl),"\\","/",-1)

					//如果是本地路径，则需要将图片复制到项目目录
					if !strings.HasPrefix(imageUrl, "http://") && !strings.HasPrefix(imageUrl, "https://") {
						if strings.HasPrefix(imageUrl, "/") {
							imageUrl = filepath.Join(tempPath, imageUrl)
						} else if strings.HasPrefix(imageUrl, "./") {
							imageUrl = filepath.Join(filepath.Dir(path), strings.TrimPrefix(imageUrl, "./"))
						} else if strings.HasPrefix(imageUrl, "../") {
							imageUrl = filepath.Join(filepath.Dir(path), imageUrl)
						} else {
							imageUrl = filepath.Join(filepath.Dir(path), imageUrl)
						}
						imageUrl = strings.Replace(imageUrl,"\\","/",-1)
						dstFile := filepath.Join(conf.WorkingDirectory,"uploads",time.Now().Format("200601"),strings.TrimPrefix(imageUrl,tempPath))

						if filetil.FileExists(imageUrl) {
							filetil.CopyFile(imageUrl,dstFile)

							imageUrl = strings.TrimPrefix(dstFile,conf.WorkingDirectory)

							if !strings.HasPrefix(imageUrl,"/") && !strings.HasPrefix(imageUrl,"\\"){
								imageUrl = "/" + imageUrl
							}
						}

					}else{
						imageExt := cryptil.Md5Crypt(imageUrl) + filepath.Ext(imageUrl)

						dstFile := filepath.Join(conf.WorkingDirectory,"uploads",time.Now().Format("200601"),imageExt)

						if err := requests.DownloadAndSaveFile(imageUrl,dstFile) ;err == nil {
							imageUrl =  strings.TrimPrefix(strings.Replace(dstFile,"\\","/",-1),strings.Replace(conf.WorkingDirectory,"\\","/",-1))
							if !strings.HasPrefix(imageUrl,"/") && !strings.HasPrefix(imageUrl,"\\"){
								imageUrl = "/" + imageUrl
							}
						}
					}

					imageUrl = strings.Replace(strings.TrimSuffix(image,originalImageUrl + ")") + imageUrl + ")","\\","/",-1)
					beego.Info(imageUrl)
					return imageUrl
				})
				doc.Content = string(blackfriday.Run([]byte(doc.Markdown)))
				doc.Release = doc.Content

				//beego.Info(content)
				//images := re.FindAllSubmatch(markdown,-1);
				//
				//for _,image := range images {
				//	originalImageUrl :=  string(image[1])
				//	imageUrl := string(originalImageUrl)
				//
				//	if !strings.HasPrefix(imageUrl,"http://") && !strings.HasPrefix(imageUrl,"https://") {
				//		if strings.HasPrefix(imageUrl, "/") {
				//			imageUrl = filepath.Join(tempPath, imageUrl)
				//		} else if strings.HasPrefix(imageUrl, "./") {
				//			imageUrl = filepath.Join(filepath.Dir(path), strings.TrimPrefix(imageUrl, "./"))
				//		} else if strings.HasPrefix(imageUrl, "../") {
				//			imageUrl = filepath.Join(filepath.Dir(path), imageUrl)
				//		}else{
				//			imageUrl = filepath.Join(filepath.Dir(path), imageUrl)
				//		}
				//
				//	}
				//	beego.Info(imageUrl)
				//}
			}
		}


		return nil
	})

	return err
}