package utils

import (
	"baliance.com/gooxml/document"
	"bytes"
	"compress/gzip"
	"context"
	"github.com/google/go-tika/tika"
	"github.com/ledongthuc/pdf"
	"github.com/tealeg/xlsx"
	"io"
	"io/ioutil"
	"log"
	"net/http"
	"os"
	"regexp"
	"strings"
)

func ReadPdfAll2(path string) (string, error) {
	f, err := os.Open(path)
	defer f.Close()
	if err != nil {
		return "", err
	}

	client := tika.NewClient(nil, "http://127.0.0.1:9998")
	res, err := client.Parse(context.TODO(), f)
	return TrimHtml(res), err
}

//读取Excel全部数据
func ReadExcelAll(excelPath string) ([]string, error) {
	// 打开 Excel 文件
	xlFile, err := xlsx.OpenFile(excelPath)
	if err != nil {
		return nil, err
	}
	texts := make([]string, 0)
	// 遍历每个 Sheet
	for _, sheet := range xlFile.Sheets {
		// 遍历每行数据
		for _, row := range sheet.Rows {
			line := ""
			// 遍历每个单元格
			for _, cell := range row.Cells {
				// 输出单元格的值
				line += cell.Value
			}
			if line == "" {
				continue
			}
			texts = append(texts, line)
		}

	}
	return texts, nil
}
func ReadDocxAll(fileName string) (string, error) {
	doc, err := document.Open(fileName)
	if err != nil {
		return "", err
	}
	text := ""

	for _, para := range doc.Paragraphs() {
		//run为每个段落相同格式的文字组成的片段
		for _, run := range para.Runs() {
			text += run.Text()
		}
	}
	return text, nil
}

//读取pdf文字内容
func ReadPdfAll(path string) (string, error) {
	f, r, err := pdf.Open(path)
	text := ""
	// remember close file
	defer f.Close()
	if err != nil {
		if err != nil {
			text, err = ReadPdfAll2(path)
		}
		return text, err
	}
	var buf bytes.Buffer
	b, err := r.GetPlainText()
	if err != nil {
		if err != nil {
			text, err = ReadPdfAll2(path)
		}
		return text, err
	}
	buf.ReadFrom(b)
	return TrimHtml(buf.String()), nil
}
func HttpGet(url string) string {
	res, err := http.Get(url)
	if err != nil {
		log.Println(err)
		return ""
	}
	var reader io.ReadCloser
	if res.Header.Get("Content-Encoding") == "gzip" {
		reader, err = gzip.NewReader(res.Body)
		if err != nil {
			return ""
		}
	} else {
		reader = res.Body
	}
	//utf8Reader := transform.NewReader(reader,
	//	simplifiedchinese.GBK.NewDecoder())
	robots, err := ioutil.ReadAll(reader)
	res.Body.Close()
	if err != nil {
		log.Println(err)
		return ""
	}
	return string(robots)
}

/**
去除html标签，过滤html标签
*/
func TrimHtml(src string) string {
	//将HTML标签全转换成小写
	re, _ := regexp.Compile("\\<[\\S\\s]+?\\>")
	src = re.ReplaceAllStringFunc(src, strings.ToLower)
	//去除STYLE
	re, _ = regexp.Compile("\\<style[\\S\\s]+?\\</style\\>")
	src = re.ReplaceAllString(src, "")
	//去除SCRIPT
	re, _ = regexp.Compile("\\<script[\\S\\s]+?\\</script\\>")
	src = re.ReplaceAllString(src, "")
	//去除所有尖括号内的HTML代码，并换成换行符
	re, _ = regexp.Compile("\\<[\\S\\s]+?\\>")
	src = re.ReplaceAllString(src, "")
	//去除连续的换行符
	re, _ = regexp.Compile("\\s{2,}")
	src = re.ReplaceAllString(src, "")
	return strings.TrimSpace(src)
}

// 通过map主键唯一的特性过滤重复元素
func RemoveRepByMap(slc []string) []string {
	result := []string{}
	tempMap := map[string]byte{} // 存放不重复主键
	for _, e := range slc {
		l := len(tempMap)
		tempMap[e] = 0
		if len(tempMap) != l { // 加入map后，map长度变化，则元素不重复
			result = append(result, e)
		}
	}
	return result
}