/*
Copyright © 2019 NAME HERE <EMAIL ADDRESS>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package cmd

import (
	"log"
	"net/http"
	"os"
	"regexp"
	"strings"
	"text/template"

	"github.com/PuerkitoBio/goquery"
	"github.com/spf13/cobra"
)

// dictCmd represents the dict command
var dictCmd = &cobra.Command{
	Use:   "dict",
	Short: "Translation between English and Chinese.",
	Run: func(cmd *cobra.Command, args []string) {
		doTranslate(cmd, args)
	},
}

func init() {
	rootCmd.AddCommand(dictCmd)

	// Here you will define your flags and configuration settings.

	// Cobra supports Persistent Flags which will work for this command
	// and all subcommands, e.g.:
	// dictCmd.PersistentFlags().String("foo", "", "A help for foo")

	// Cobra supports local flags which will only run when this command
	// is called directly, e.g.:
	// dictCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
}

const api string = "https://dict.cn/"

type Word struct {
	Name     string
	Phonetic string
	Basic    string
	Detail   string
	Dualingo string //双语解释
	EnExpl   string //英英释义
	Example  string //例句
	Pattern  string //常见句型
	Coll     string //词汇搭配
	Author   string //经典引文
	Ess      string //词语语法
	Etm      string //词源解说
}

func (w *Word) show(detail bool) {
	var t *template.Template
	if detail {
		t, _ = template.New("dict").Parse("{{ .Name }}: {{ .Phonetic }}{{ .Basic }}\n详解:\n\033[33m{{ .Detail }}\033[0m\n双语解释:\n\033[33m{{ .Dualingo }}\033[0m\n英英释义:\n\033[33m{{ .EnExpl }}\033[0m\n例句:\n\033[33m{{ .Example }}\033[0m\n常见句型:\n\033[33m{{ .Pattern }}\033[0m\n词汇搭配:\n\033[33m{{ .Coll }}\033[0m\n经典引文:\n\033[33m{{ .Author }}\033[0m\n词语语法:\n\033[33m{{ .Ess }}\033[0m\n词源解说:\n\033[33m{{ .Etm }}\033[0m\n")
	} else {
		t, _ = template.New("dict").Parse("{{ .Name }}: {{ .Phonetic }}{{ .Basic }}")
	}

	t.Execute(os.Stdout, w)
}

func doTranslate(cmd *cobra.Command, args []string) {
	if len(args) == 0 {
		log.Fatal("Please provide the WORD you want to search.")
	}

	requireDetail, _ := cmd.Flags().GetBool("long")
	wordName := strings.Join(args, " ")
	// Request the HTML page.
	res, err := http.Get(api + wordName)
	if err != nil {
		log.Fatal(err)
	}
	defer res.Body.Close()
	if res.StatusCode != 200 {
		log.Fatalf("status code error: %d %s", res.StatusCode, res.Status)
	}

	// Load the HTML document
	doc, err := goquery.NewDocumentFromReader(res.Body)

	if err != nil {
		log.Fatal(err)
	}
	w := Word{Name: wordName}
	w.parse(doc)
	w.show(requireDetail)
}

func (w *Word) parse(doc *goquery.Document) {
	reg := regexp.MustCompile("\\s+")
	sb := strings.Builder{}
	doc.Find("ul.dict-basic-ul li").Each(func(i int, s *goquery.Selection) {
		_, exists := s.Attr("style")
		if !exists {
			sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
			sb.WriteString("\n")
		}
	})
	w.Basic = strings.Trim(sb.String(), " ")
	sb.Reset()
	doc.Find("div.phonetic").Each(func(i int, s *goquery.Selection) {
		sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
		sb.WriteString("\n")
	})
	w.Phonetic = sb.String()
	sb.Reset()
	doc.Find("div.detail").Children().Each(func(i int, s *goquery.Selection) {
		if goquery.NodeName(s) == "span" {
			sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
			sb.WriteString("\n")
		} else if goquery.NodeName(s) == "ol" {
			s.Children().Each(func(i int, s *goquery.Selection) {
				sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
				sb.WriteString("\n")
			})
		}
	})
	w.Detail = sb.String()
	sb.Reset()
	doc.Find("div.dual").Children().Each(func(i int, s *goquery.Selection) {
		if goquery.NodeName(s) == "span" {
			sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
			sb.WriteString("\n")
		} else if goquery.NodeName(s) == "ol" {
			s.Children().Each(func(i int, s *goquery.Selection) {
				sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
				sb.WriteString("\n")
			})
		}
	})
	w.Dualingo = sb.String()
	sb.Reset()
	doc.Find("div.en").Children().Each(func(i int, s *goquery.Selection) {
		if goquery.NodeName(s) == "span" {
			sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
			sb.WriteString("\n")
		} else if goquery.NodeName(s) == "ol" {
			s.Children().Each(func(i int, s *goquery.Selection) {
				sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
				sb.WriteString("\n")
			})
		}
	})
	w.EnExpl = sb.String()
	sb.Reset()
	doc.Find("div.sort").Children().Each(func(i int, s *goquery.Selection) {
		if goquery.NodeName(s) == "span" {
			sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
			sb.WriteString("\n")
		} else if goquery.NodeName(s) == "ol" {
			s.Children().Each(func(i int, s *goquery.Selection) {
				sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
				sb.WriteString("\n")
			})
		}
	})
	w.Example = sb.String()
	sb.Reset()
	doc.Find("div.patt").Children().Each(func(i int, s *goquery.Selection) {
		if goquery.NodeName(s) == "span" {
			sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
			sb.WriteString("\n")
		} else if goquery.NodeName(s) == "ol" {
			s.Children().Each(func(i int, s *goquery.Selection) {
				sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
				sb.WriteString("\n")
			})
		}
	})
	w.Pattern = sb.String()
	sb.Reset()
	doc.Find("div.coll").Children().Each(func(i int, s *goquery.Selection) {
		if goquery.NodeName(s) == "div" || goquery.NodeName(s) == "b" {
			sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
			sb.WriteString("\n")
		} else if goquery.NodeName(s) == "ul" {
			s.Children().Each(func(i int, s *goquery.Selection) {
				sb.WriteString("\t")
				sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
				sb.WriteString("\n")
			})
		}
	})
	w.Coll = sb.String()
	sb.Reset()
	doc.Find("div.auth ul").Children().Each(func(i int, s *goquery.Selection) {
		s.Children().Each(func(i int, s *goquery.Selection) {
			sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
			sb.WriteString("\n")
		})
	})
	w.Author = sb.String()
	sb.Reset()
	doc.Find("div.ess").Children().Each(func(i int, s *goquery.Selection) {
		if goquery.NodeName(s) == "span" {
			sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
			sb.WriteString("\n")
		} else if goquery.NodeName(s) == "ol" {
			s.Children().Each(func(i int, s *goquery.Selection) {
				sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
				sb.WriteString("\n")
			})
		}
	})
	w.Ess = sb.String()
	sb.Reset()
	doc.Find("div.etm ul").Children().Each(func(i int, s *goquery.Selection) {
		sb.WriteString(strings.Trim(reg.ReplaceAllString(s.Text(), " "), " "))
		sb.WriteString("\n")
	})
	w.Etm = sb.String()
}