package controllers

import (
	"encoding/json"
	"errors"
	"fmt"
	"html/template"
	"os"
	"path/filepath"
	"regexp"
	"strconv"
	"strings"
	"time"

	"net/http"

	"github.com/astaxie/beego"
	"github.com/astaxie/beego/logs"
	"github.com/astaxie/beego/orm"
	"github.com/lifei6671/mindoc/conf"
	"github.com/lifei6671/mindoc/graphics"
	"github.com/lifei6671/mindoc/models"
	"github.com/lifei6671/mindoc/utils"
	"github.com/lifei6671/mindoc/utils/pagination"
	"gopkg.in/russross/blackfriday.v2"
)

type BookController struct {
	BaseController
}

func (c *BookController) Index() {
	c.Prepare()
	c.TplName = "book/index.tpl"

	pageIndex, _ := c.GetInt("page", 1)

	books, totalCount, err := models.NewBook().FindToPager(pageIndex, conf.PageSize, c.Member.MemberId)

	if err != nil {
		logs.Error("BookController.Index => ", err)
		c.Abort("500")
	}

	for i, book := range books {
		books[i].Description = utils.StripTags(string(blackfriday.Run([]byte(book.Description))))
		books[i].ModifyTime = book.ModifyTime.Local()
		books[i].CreateTime = book.CreateTime.Local()
	}

	if totalCount > 0 {
		pager := pagination.NewPagination(c.Ctx.Request, totalCount, conf.PageSize, c.BaseUrl())
		c.Data["PageHtml"] = pager.HtmlPages()
	} else {
		c.Data["PageHtml"] = ""
	}
	b, err := json.Marshal(books)

	if err != nil || len(books) <= 0 {
		c.Data["Result"] = template.JS("[]")
	} else {
		c.Data["Result"] = template.JS(string(b))
	}
}

// Dashboard 项目概要 .
func (c *BookController) Dashboard() {
	c.Prepare()
	c.TplName = "book/dashboard.tpl"

	key := c.Ctx.Input.Param(":key")

	if key == "" {
		c.Abort("404")
	}

	book, err := models.NewBookResult().FindByIdentify(key, c.Member.MemberId)
	if err != nil {
		if err == models.ErrPermissionDenied {
			c.Abort("403")
		}
		beego.Error(err)
		c.Abort("500")
	}

	c.Data["Description"] = template.HTML(blackfriday.Run([]byte(book.Description)))
	c.Data["Model"] = *book
}

// Setting 项目设置 .
func (c *BookController) Setting() {
	c.Prepare()
	c.TplName = "book/setting.tpl"

	key := c.Ctx.Input.Param(":key")

	if key == "" {
		c.Abort("404")
	}

	book, err := models.NewBookResult().FindByIdentify(key, c.Member.MemberId)
	if err != nil {
		if err == orm.ErrNoRows {
			c.Abort("404")
		}
		if err == models.ErrPermissionDenied {
			c.Abort("403")
		}
		c.Abort("500")
	}
	//如果不是创始人也不是管理员则不能操作
	if book.RoleId != conf.BookFounder && book.RoleId != conf.BookAdmin {
		c.Abort("403")
	}
	if book.PrivateToken != "" {
		book.PrivateToken = conf.URLFor("DocumentController.Index", ":key", book.Identify, "token", book.PrivateToken)
	}
	c.Data["Model"] = book

}

//保存项目信息
func (c *BookController) SaveBook() {
	bookResult, err := c.IsPermission()

	if err != nil {
		c.JsonResult(6001, err.Error())
	}
	book, err := models.NewBook().Find(bookResult.BookId)

	if err != nil {
		logs.Error("SaveBook => ", err)
		c.JsonResult(6002, err.Error())
	}

	bookName := strings.TrimSpace(c.GetString("book_name"))
	description := strings.TrimSpace(c.GetString("description", ""))
	commentStatus := c.GetString("comment_status")
	tag := strings.TrimSpace(c.GetString("label"))
	editor := strings.TrimSpace(c.GetString("editor"))
	autoRelease := strings.TrimSpace(c.GetString("auto_release")) == "on"
	publisher := strings.TrimSpace(c.GetString("publisher"))
	historyCount, _ := c.GetInt("history_count", 0)
	isDownload := strings.TrimSpace(c.GetString("is_download")) == "on"
	enableShare := strings.TrimSpace(c.GetString("enable_share")) == "on"
	isUseFirstDocument := strings.TrimSpace(c.GetString("is_use_first_document")) == "on"

	if strings.Count(description, "") > 500 {
		c.JsonResult(6004, "项目描述不能大于500字")
	}
	if commentStatus != "open" && commentStatus != "closed" && commentStatus != "group_only" && commentStatus != "registered_only" {
		commentStatus = "closed"
	}
	if tag != "" {
		tags := strings.Split(tag, ",")
		if len(tags) > 10 {
			c.JsonResult(6005, "最多允许添加10个标签")
		}
	}
	if editor != "markdown" && editor != "html" {
		editor = "markdown"
	}

	book.BookName = bookName
	book.Description = description
	book.CommentStatus = commentStatus
	book.Publisher = publisher
	book.Label = tag
	book.Editor = editor
	book.HistoryCount = historyCount
	book.IsDownload = 0

	if autoRelease {
		book.AutoRelease = 1
	} else {
		book.AutoRelease = 0
	}
	if isDownload {
		book.IsDownload = 0
	} else {
		book.IsDownload = 1
	}
	if enableShare {
		book.IsEnableShare = 0
	} else {
		book.IsEnableShare = 1
	}
	if isUseFirstDocument {
		book.IsUseFirstDocument = 1
	} else {
		book.IsUseFirstDocument = 0
	}
	if err := book.Update(); err != nil {
		c.JsonResult(6006, "保存失败")
	}
	bookResult.BookName = bookName
	bookResult.Description = description
	bookResult.CommentStatus = commentStatus
	bookResult.Label = tag
	c.JsonResult(0, "ok", bookResult)
}

//设置项目私有状态.
func (c *BookController) PrivatelyOwned() {

	status := c.GetString("status")

	if status != "open" && status != "close" {
		c.JsonResult(6003, "参数错误")
	}
	state := 0
	if status == "open" {
		state = 0
	} else {
		state = 1
	}

	bookResult, err := c.IsPermission()

	if err != nil {
		c.JsonResult(6001, err.Error())
	}
	//只有创始人才能变更私有状态
	if bookResult.RoleId != conf.BookFounder {
		c.JsonResult(6002, "权限不足")
	}

	book, err := models.NewBook().Find(bookResult.BookId)

	if err != nil {
		c.JsonResult(6005, "项目不存在")
	}
	book.PrivatelyOwned = state

	err = book.Update()

	if err != nil {
		logs.Error("PrivatelyOwned => ", err)
		c.JsonResult(6004, "保存失败")
	}
	c.JsonResult(0, "ok")
}

// Transfer 转让项目.
func (c *BookController) Transfer() {
	c.Prepare()
	account := c.GetString("account")

	if account == "" {
		c.JsonResult(6004, "接受者账号不能为空")
	}
	member, err := models.NewMember().FindByAccount(account)

	if err != nil {
		logs.Error("FindByAccount => ", err)
		c.JsonResult(6005, "接受用户不存在")
	}
	if member.Status != 0 {
		c.JsonResult(6006, "接受用户已被禁用")
	}
	if member.MemberId == c.Member.MemberId {
		c.JsonResult(6007, "不能转让给自己")
	}
	bookResult, err := c.IsPermission()

	if err != nil {
		c.JsonResult(6001, err.Error())
	}

	err = models.NewRelationship().Transfer(bookResult.BookId, c.Member.MemberId, member.MemberId)

	if err != nil {
		logs.Error("Transfer => ", err)
		c.JsonResult(6008, err.Error())
	}
	c.JsonResult(0, "ok")
}

//上传项目封面.
func (c *BookController) UploadCover() {

	bookResult, err := c.IsPermission()

	if err != nil {
		c.JsonResult(6001, err.Error())
	}
	book, err := models.NewBook().Find(bookResult.BookId)

	if err != nil {
		logs.Error("SaveBook => ", err)
		c.JsonResult(6002, err.Error())
	}

	file, moreFile, err := c.GetFile("image-file")
	defer file.Close()

	if err != nil {
		logs.Error("", err.Error())
		c.JsonResult(500, "读取文件异常")
	}

	ext := filepath.Ext(moreFile.Filename)

	if !strings.EqualFold(ext, ".png") && !strings.EqualFold(ext, ".jpg") && !strings.EqualFold(ext, ".gif") && !strings.EqualFold(ext, ".jpeg") {
		c.JsonResult(500, "不支持的图片格式")
	}

	x1, _ := strconv.ParseFloat(c.GetString("x"), 10)
	y1, _ := strconv.ParseFloat(c.GetString("y"), 10)
	w1, _ := strconv.ParseFloat(c.GetString("width"), 10)
	h1, _ := strconv.ParseFloat(c.GetString("height"), 10)

	x := int(x1)
	y := int(y1)
	width := int(w1)
	height := int(h1)

	fileName := "cover_" + strconv.FormatInt(time.Now().UnixNano(), 16)

	filePath := filepath.Join("uploads", time.Now().Format("200601"), fileName+ext)

	path := filepath.Dir(filePath)

	os.MkdirAll(path, os.ModePerm)

	err = c.SaveToFile("image-file", filePath)

	if err != nil {
		logs.Error("", err)
		c.JsonResult(500, "图片保存失败")
	}
	defer func(filePath string) {
		os.Remove(filePath)
	}(filePath)

	//剪切图片
	subImg, err := graphics.ImageCopyFromFile(filePath, x, y, width, height)

	if err != nil {
		logs.Error("graphics.ImageCopyFromFile => ", err)
		c.JsonResult(500, "图片剪切")
	}

	filePath = filepath.Join(conf.WorkingDirectory, "uploads", time.Now().Format("200601"), fileName+"_small"+ext)

	//生成缩略图并保存到磁盘
	err = graphics.ImageResizeSaveFile(subImg, 175, 230, filePath)

	if err != nil {
		logs.Error("ImageResizeSaveFile => ", err.Error())
		c.JsonResult(500, "保存图片失败")
	}

	url := "/" + strings.Replace(strings.TrimPrefix(filePath, conf.WorkingDirectory), "\\", "/", -1)

	if strings.HasPrefix(url, "//") {
		url = string(url[1:])
	}

	oldCover := book.Cover

	book.Cover = conf.URLForWithCdnImage(url)

	if err := book.Update(); err != nil {
		c.JsonResult(6001, "保存图片失败")
	}
	//如果原封面不是默认封面则删除
	if oldCover != conf.GetDefaultCover() {
		os.Remove("." + oldCover)
	}

	c.JsonResult(0, "ok", url)
}

// Users 用户列表.
func (c *BookController) Users() {
	c.Prepare()
	c.TplName = "book/users.tpl"

	key := c.Ctx.Input.Param(":key")
	pageIndex, _ := c.GetInt("page", 1)

	if key == "" {
		c.Abort("404")
	}

	book, err := models.NewBookResult().FindByIdentify(key, c.Member.MemberId)
	if err != nil {
		if err == models.ErrPermissionDenied {
			c.Abort("403")
		}
		c.Abort("500")
	}

	c.Data["Model"] = *book

	members, totalCount, err := models.NewMemberRelationshipResult().FindForUsersByBookId(book.BookId, pageIndex, 15)

	if totalCount > 0 {
		pager := pagination.NewPagination(c.Ctx.Request, totalCount, conf.PageSize, c.BaseUrl())
		c.Data["PageHtml"] = pager.HtmlPages()
	} else {
		c.Data["PageHtml"] = ""
	}
	b, err := json.Marshal(members)

	if err != nil {
		c.Data["Result"] = template.JS("[]")
	} else {
		c.Data["Result"] = template.JS(string(b))
	}
}

// Create 创建项目.
func (c *BookController) Create() {

	if c.Ctx.Input.IsPost() {
		bookName := strings.TrimSpace(c.GetString("book_name", ""))
		identify := strings.TrimSpace(c.GetString("identify", ""))
		description := strings.TrimSpace(c.GetString("description", ""))
		privatelyOwned, _ := strconv.Atoi(c.GetString("privately_owned"))
		commentStatus := c.GetString("comment_status")

		if bookName == "" {
			c.JsonResult(6001, "项目名称不能为空")
		}
		if identify == "" {
			c.JsonResult(6002, "项目标识不能为空")
		}
		if ok, err := regexp.MatchString(`^[a-z]+[a-zA-Z0-9_\-]*$`, identify); !ok || err != nil {
			c.JsonResult(6003, "项目标识只能包含小写字母、数字，以及“-”和“_”符号,并且只能小写字母开头")
		}
		if strings.Count(identify, "") > 50 {
			c.JsonResult(6004, "文档标识不能超过50字")
		}
		if strings.Count(description, "") > 500 {
			c.JsonResult(6004, "项目描述不能大于500字")
		}
		if privatelyOwned != 0 && privatelyOwned != 1 {
			privatelyOwned = 1
		}
		if commentStatus != "open" && commentStatus != "closed" && commentStatus != "group_only" && commentStatus != "registered_only" {
			commentStatus = "closed"
		}
		book := models.NewBook()
		book.Cover = conf.GetDefaultCover()

		//如果客户端上传了项目封面则直接保存
		if file, moreFile, err := c.GetFile("image-file"); err == nil {
			defer file.Close()

			ext := filepath.Ext(moreFile.Filename)

			//如果上传的是图片
			if strings.EqualFold(ext, ".png") || strings.EqualFold(ext, ".jpg") || strings.EqualFold(ext, ".gif") || strings.EqualFold(ext, ".jpeg") {

				fileName := "cover_" + strconv.FormatInt(time.Now().UnixNano(), 16)

				filePath := filepath.Join("uploads", time.Now().Format("200601"), fileName+ext)

				path := filepath.Dir(filePath)

				os.MkdirAll(path, os.ModePerm)

				if err := c.SaveToFile("image-file", filePath); err == nil {
					url := "/" + strings.Replace(strings.TrimPrefix(filePath, conf.WorkingDirectory), "\\", "/", -1)

					if strings.HasPrefix(url, "//") {
						url = string(url[1:])
					}
					book.Cover = url
				}
			}
		}

		if books, _ := book.FindByField("identify", identify,"book_id"); len(books) > 0 {
			c.JsonResult(6006, "项目标识已存在")
		}

		book.BookName = bookName
		book.Description = description
		book.CommentCount = 0
		book.PrivatelyOwned = privatelyOwned
		book.CommentStatus = commentStatus
		book.Identify = identify
		book.DocCount = 0
		book.MemberId = c.Member.MemberId
		book.CommentCount = 0
		book.Version = time.Now().Unix()
		book.IsEnableShare = 0
		book.IsUseFirstDocument = 1
		book.IsDownload = 1
		book.AutoRelease = 0

		book.Editor = "markdown"
		book.Theme = "default"

		if err := book.Insert(); err != nil {
			logs.Error("Insert => ", err)
			c.JsonResult(6005, "保存项目失败")
		}
		bookResult, err := models.NewBookResult().FindByIdentify(book.Identify, c.Member.MemberId)

		if err != nil {
			beego.Error(err)
		}

		c.JsonResult(0, "ok", bookResult)
	}
	c.JsonResult(6001, "error")
}
//复制项目
func (c *BookController) Copy(){
	if c.Ctx.Input.IsPost() {
		identify := strings.TrimSpace(c.GetString("identify", ""))
		if identify == "" {
			c.JsonResult(6001,"参数错误")
		}
		book := models.NewBook()
		err := book.Copy(identify)
		if err != nil {
			c.JsonResult(6002,"复制项目出错")
		}else{
			bookResult, err := models.NewBookResult().FindByIdentify(book.Identify, c.Member.MemberId)
			if err != nil {
				beego.Error("查询失败")
			}
			c.JsonResult(0,"ok",bookResult)
		}
	}
}

//导入zip压缩包
func (c *BookController) Import() {

	file, moreFile, err := c.GetFile("import-file")
	if err == http.ErrMissingFile {
		c.JsonResult(6003, "没有发现需要上传的文件")
	}

	defer file.Close()

	bookName := strings.TrimSpace(c.GetString("book_name"))
	identify := strings.TrimSpace(c.GetString("identify"))
	description := strings.TrimSpace(c.GetString("description", ""))
	privatelyOwned, _ := strconv.Atoi(c.GetString("privately_owned"))

	if bookName == "" {
		c.JsonResult(6001, "项目名称不能为空")
	}
	if len([]rune(bookName)) > 500 {
		c.JsonResult(6002, "项目名称不能大于500字")
	}
	if identify == "" {
		c.JsonResult(6002, "项目标识不能为空")
	}
	if ok, err := regexp.MatchString(`^[a-z]+[a-zA-Z0-9_\-]*$`, identify); !ok || err != nil {
		c.JsonResult(6003, "项目标识只能包含小写字母、数字，以及“-”和“_”符号,并且只能小写字母开头")
	}
	if strings.Count(identify, "") > 50 {
		c.JsonResult(6004, "文档标识不能超过50字")
	}

	ext := filepath.Ext(moreFile.Filename)

	if !strings.EqualFold(ext, ".zip") {
		c.JsonResult(6004, "不支持的文件类型")
	}

	if books, _ := models.NewBook().FindByField("identify", identify,"book_id"); len(books) > 0 {
		c.JsonResult(6006, "项目标识已存在")
	}

	tempPath := filepath.Join(os.TempDir(), c.CruSession.SessionID())

	os.MkdirAll(tempPath, 0766)

	tempPath = filepath.Join(tempPath, moreFile.Filename)

	err = c.SaveToFile("import-file", tempPath)

	book := models.NewBook()

	book.MemberId = c.Member.MemberId
	book.Cover = conf.GetDefaultCover()
	book.BookName = bookName
	book.Description = description
	book.CommentCount = 0
	book.PrivatelyOwned = privatelyOwned
	book.CommentStatus = "closed"
	book.Identify = identify
	book.DocCount = 0
	book.MemberId = c.Member.MemberId
	book.CommentCount = 0
	book.Version = time.Now().Unix()

	book.Editor = "markdown"
	book.Theme = "default"


	go book.ImportBook(tempPath)

	c.JsonResult(0, "项目正在后台转换中，请稍后查看")
}

// CreateToken 创建访问来令牌.
func (c *BookController) CreateToken() {

	action := c.GetString("action")

	bookResult, err := c.IsPermission()

	if err != nil {
		if err == models.ErrPermissionDenied {
			c.JsonResult(403, "权限不足")
		}
		if err == orm.ErrNoRows {
			c.JsonResult(404, "项目不存在")
		}
		logs.Error("生成阅读令牌失败 =>", err)
		c.JsonResult(6002, err.Error())
	}
	book := models.NewBook()

	if _, err := book.Find(bookResult.BookId); err != nil {
		c.JsonResult(6001, "项目不存在")
	}
	if action == "create" {
		if bookResult.PrivatelyOwned == 0 {
			c.JsonResult(6001, "公开项目不能创建阅读令牌")
		}

		book.PrivateToken = string(utils.Krand(conf.GetTokenSize(), utils.KC_RAND_KIND_ALL))
		if err := book.Update(); err != nil {
			logs.Error("生成阅读令牌失败 => ", err)
			c.JsonResult(6003, "生成阅读令牌失败")
		}
		c.JsonResult(0, "ok", conf.URLFor("DocumentController.Index", ":key", book.Identify, "token", book.PrivateToken))
	} else {
		book.PrivateToken = ""
		if err := book.Update(); err != nil {
			logs.Error("CreateToken => ", err)
			c.JsonResult(6004, "删除令牌失败")
		}
		c.JsonResult(0, "ok", "")
	}
}

// Delete 删除项目.
func (c *BookController) Delete() {
	c.Prepare()

	bookResult, err := c.IsPermission()

	if err != nil {
		c.JsonResult(6001, err.Error())
	}

	if bookResult.RoleId != conf.BookFounder {
		c.JsonResult(6002, "只有创始人才能删除项目")
	}
	err = models.NewBook().ThoroughDeleteBook(bookResult.BookId)

	if err == orm.ErrNoRows {
		c.JsonResult(6002, "项目不存在")
	}
	if err != nil {
		logs.Error("删除项目 => ", err)
		c.JsonResult(6003, "删除失败")
	}
	c.JsonResult(0, "ok")
}

//发布项目.
func (c *BookController) Release() {
	c.Prepare()

	identify := c.GetString("identify")

	bookId := 0

	if c.Member.IsAdministrator() {
		book, err := models.NewBook().FindByFieldFirst("identify", identify)
		if err != nil {

		}
		bookId = book.BookId
	} else {
		book, err := models.NewBookResult().FindByIdentify(identify, c.Member.MemberId)

		if err != nil {
			if err == models.ErrPermissionDenied {
				c.JsonResult(6001, "权限不足")
			}
			if err == orm.ErrNoRows {
				c.JsonResult(6002, "项目不存在")
			}
			beego.Error(err)
			c.JsonResult(6003, "未知错误")
		}
		if book.RoleId != conf.BookAdmin && book.RoleId != conf.BookFounder && book.RoleId != conf.BookEditor {
			c.JsonResult(6003, "权限不足")
		}
		bookId = book.BookId
	}
	go func(identify string) {
		models.NewBook().ReleaseContent(bookId)

		//当文档发布后，需要删除已缓存的转换项目
		outputPath := filepath.Join(beego.AppConfig.DefaultString("book_output_path", "cache"), strconv.Itoa(bookId))
		os.RemoveAll(outputPath)

	}(identify)

	c.JsonResult(0, "发布任务已推送到任务队列，稍后将在后台执行。")
}

//文档排序.
func (c *BookController) SaveSort() {
	c.Prepare()

	identify := c.Ctx.Input.Param(":key")
	if identify == "" {
		c.Abort("404")
	}

	book_id := 0
	if c.Member.IsAdministrator() {
		book, err := models.NewBook().FindByFieldFirst("identify", identify)
		if err != nil {

		}
		book_id = book.BookId
	} else {
		bookResult, err := models.NewBookResult().FindByIdentify(identify, c.Member.MemberId)
		if err != nil {
			beego.Error("DocumentController.Edit => ", err)

			c.Abort("403")
		}
		if bookResult.RoleId == conf.BookObserver {
			c.JsonResult(6002, "项目不存在或权限不足")
		}
		book_id = bookResult.BookId
	}

	content := c.Ctx.Input.RequestBody

	var docs []map[string]interface{}

	err := json.Unmarshal(content, &docs)

	if err != nil {
		beego.Error(err)
		c.JsonResult(6003, "数据错误")
	}

	for _, item := range docs {
		if doc_id, ok := item["id"].(float64); ok {
			doc, err := models.NewDocument().Find(int(doc_id))
			if err != nil {
				beego.Error(err)
				continue
			}
			if doc.BookId != book_id {
				logs.Info("%s", "权限错误")
				continue
			}
			sort, ok := item["sort"].(float64)
			if !ok {
				beego.Info("排序数字转换失败 => ", item)
				continue
			}
			parent_id, ok := item["parent"].(float64)
			if !ok {
				beego.Info("父分类转换失败 => ", item)
				continue
			}
			if parent_id > 0 {
				if parent, err := models.NewDocument().Find(int(parent_id)); err != nil || parent.BookId != book_id {
					continue
				}
			}
			doc.OrderSort = int(sort)
			doc.ParentId = int(parent_id)
			if err := doc.InsertOrUpdate(); err != nil {
				fmt.Printf("%s", err.Error())
				beego.Error(err)
			}
		} else {
			fmt.Printf("文档ID转换失败 => %+v", item)
		}

	}
	c.JsonResult(0, "ok")
}

func (c *BookController) IsPermission() (*models.BookResult, error) {
	identify := c.GetString("identify")

	book, err := models.NewBookResult().FindByIdentify(identify, c.Member.MemberId)

	if err != nil {
		if err == models.ErrPermissionDenied {
			return book, errors.New("权限不足")
		}
		if err == orm.ErrNoRows {
			return book, errors.New("项目不存在")
		}
		return book, err
	}
	if book.RoleId != conf.BookAdmin && book.RoleId != conf.BookFounder {
		return book, errors.New("权限不足")
	}
	return book, nil
}