package google

import (
	"context"
	"fmt"
	"io"
	"net/http"
	"net/url"
	"strconv"
	"strings"

	"bet24.com/servers/adminserver/config"
	"bet24.com/utils"

	"bet24.com/log"
	"cloud.google.com/go/translate"
	"golang.org/x/text/language"
	"google.golang.org/api/option"
)

// 是否翻译
func IsTranslate() (bool, string) {
	googleJson := config.Server.GOOGLE_APPLICATION_CREDENTIALS
	if googleJson == "" {
		// log.Debug("google翻译未配置 json 文件")
		return false, "google翻译未配置 json 文件"
	}
	return true, googleJson
}

func Translate(sourceLanguage, targetLanguage, text string) (string, error) {
	utils.SetMinTraceTime(1000)
	defer utils.TimeCost(fmt.Sprintf("google.Translate sourceLanguage=%s targetLanguage=%s text==>%s   ",
		sourceLanguage,
		targetLanguage,
		text))()

	ok, googleJson := IsTranslate()
	if !ok {
		return "", fmt.Errorf(googleJson)
	}

	if _, err := strconv.ParseFloat(text, 64); err == nil {
		// log.Debug(fmt.Sprintf("Google Translate 纯数字无需翻译 ==> %s", text))
		return "", err
	}

	ctx := context.Background()

	// sourceLang, err := language.Parse(sourceLanguage)
	// if err != nil {
	// 	return "", fmt.Errorf("%s source language.Parse: %v", sourceLanguage, err)
	// }

	tarLang, err := language.Parse(targetLanguage)
	if err != nil {
		log.Error("%s target language.Parse: %v", targetLanguage, err)
		return "", fmt.Errorf("%s target language.Parse: %v", targetLanguage, err)
	}

	// log.Debug("google.Translate ==> sourceLanguage=%+v targetLanguage=%+v text==>%s   ",
	// 	sourceLang,
	// 	tarLang,
	// 	text)

	client, err := translate.NewClient(ctx, option.WithCredentialsFile(googleJson))
	if err != nil {
		log.Error("google.Translate NewClient err = %+v", err)
		return "", err
	}
	defer client.Close()

	// resp, err := client.Translate(ctx, []string{text}, tarLang, &translate.Options{
	// 	Source: sourceLang,
	// 	Format: translate.Text,
	// })
	resp, err := client.Translate(ctx, []string{text}, tarLang, nil)
	if err != nil {
		log.Error("google.Translate Translate resp=%+v err=%+v", resp, err)
		return "", fmt.Errorf("Translate: %v", err)
	}
	if len(resp) == 0 {
		log.Error("google.Translate Translate resp=%+v", resp)
		return "", fmt.Errorf("Translate returned empty response to text: %s", text)
	}

	// log.Debug("google.Translate ==> Translate sourceLanguage=%s targetLanguage=%s resp=%+v err=%+v",
	// 	sourceLanguage, targetLanguage, resp, err)

	return resp[0].Text, nil
}

func TranslateTextWithModel(targetLanguage, text, model string) (string, error) {
	// targetLanguage := "ja"
	// text := "The Go Gopher is cute"
	// model := "nmt"

	utils.SetMinTraceTime(1000)
	defer utils.TimeCost(fmt.Sprintf("google.Translate targetLanguage=%s model=%s text==>%s   ",
		targetLanguage,
		model,
		text))()

	ok, googleJson := IsTranslate()
	if !ok {
		return "", fmt.Errorf(googleJson)
	}

	if _, err := strconv.ParseFloat(text, 64); err == nil {
		// log.Debug(fmt.Sprintf("Google Translate 纯数字无需翻译 ==> %s", text))
		return "", err
	}

	ctx := context.Background()

	lang, err := language.Parse(targetLanguage)
	if err != nil {
		return "", fmt.Errorf("language.Parse: %v", err)
	}

	log.Debug("google.TranslateTextWithModel ==> targetLanguage=%+v model=%s text==>%s   ",
		targetLanguage,
		model,
		text)

	client, err := translate.NewClient(ctx, option.WithCredentialsFile(googleJson))
	if err != nil {
		return "", fmt.Errorf("translate.NewClient: %v", err)
	}
	defer client.Close()

	resp, err := client.Translate(ctx, []string{text}, lang, &translate.Options{
		Model: "base", // Either "nmt" or "base".
	})
	if err != nil {
		return "", fmt.Errorf("Translate: %v", err)
	}
	if len(resp) == 0 {
		return "", nil
	}

	log.Debug("google.TranslateTextWithModel ==> Translate targetLanguage=%s model=%s resp=%+v err=%+v",
		targetLanguage, model, resp, err)

	return resp[0].Text, nil
}

func DetectLanguage(text string) (*translate.Detection, error) {
	// text := "こんにちは世界"

	ok, googleJson := IsTranslate()
	if !ok {
		return nil, fmt.Errorf(googleJson)
	}

	ctx := context.Background()
	client, err := translate.NewClient(ctx, option.WithCredentialsFile(googleJson))
	if err != nil {
		return nil, fmt.Errorf("translate.NewClient: %v", err)
	}
	defer client.Close()
	lang, err := client.DetectLanguage(ctx, []string{text})
	if err != nil {
		return nil, fmt.Errorf("DetectLanguage: %v", err)
	}
	if len(lang) == 0 || len(lang[0]) == 0 {
		return nil, fmt.Errorf("DetectLanguage return value empty")
	}

	log.Debug("google.DetectLanguage ==> lang = %+v", lang)

	return &lang[0][0], nil
}

// Google 翻译API
// url	    GET	        https://translate.googleapis.com/translate_a/single
// client	url-query	默认值(不要修改) gtx
// sl	    url-query	来源语言 en zh-cn 语言代码如下
// tl	    url-query	目标语言 en zh-cn 语言代码如下
// dt	    url-query	默认值(不要修改) t
// q	u   rl-query	翻译的文本 建议先url-encode
func TranslateFree(sl, tl, text string) (string, error) {
	if _, err := strconv.ParseFloat(text, 64); err == nil {
		// log.Debug(fmt.Sprintf("Google Translate 纯数字无需翻译 ==> %s", text))
		return "", err
	}

	// log.Debug("全角：%s", text)
	text = DBC2SBC(text)
	// log.Debug("半角：%s", text)

	url := fmt.Sprintf("https://translate.googleapis.com/translate_a/single?client=gtx&sl=%s&tl=%s&dt=t&q=%s",
		sl, tl, url.QueryEscape(text))

	resp, err := http.Get(url)
	if err != nil {
		return "", err
	}
	defer resp.Body.Close()
	if err != nil {
		return "", err
	}
	bs, err := io.ReadAll(resp.Body)
	if err != nil {
		return "", err
	}

	// 返回的json反序列化比较麻烦, 直接字符串拆解
	ss := string(bs)
	if strings.HasPrefix(ss, "<!DOCTYPE") {
		return "", err
	}

	ss = strings.ReplaceAll(ss, "[", "")
	ss = strings.ReplaceAll(ss, "]", "")
	ss = strings.ReplaceAll(ss, "null,", "")
	ss = strings.Trim(ss, `"`)
	ps := strings.Split(ss, `","`)

	log.Debug("google.Translate 原文：%s   译文：%s", text, ps[0])
	return ps[0], nil
}

// 全角转半角
func DBC2SBC(s string) string {
	var strLst []string
	for _, i := range s {
		insideCode := i
		if insideCode == 12288 {
			insideCode = 32
		} else {
			insideCode -= 65248
		}
		if insideCode < 32 || insideCode > 126 {
			strLst = append(strLst, string(i))
		} else {
			strLst = append(strLst, string(insideCode))
		}
	}
	return strings.Join(strLst, "")
}