package controller

import (
	"encoding/json"
	"fmt"
	"go-bot/bot/global"
	"go-bot/bot/structs"
	"io/ioutil"
	"net/http"
	"os"
	"strings"

	"github.com/eatmoreapple/openwechat"
)

// DouYinResolution 抖音解析
// Author: NothAmor
func DouYinResolution(msg *openwechat.Message) {
	split := strings.Split(msg.Content, " ")

	if len(split) == 1 {
		msg.ReplyText("请输入正确的抖音链接")
		return
	}

	// 获取抖音链接
	douyinUrl := split[1]

	// 获取抖音视频信息
	data, err := GetDouYinUrlInfo(douyinUrl)
	if err != nil {
		msg.ReplyText(fmt.Sprintf("获取抖音信息失败, 失败原因: %s", err.Error()))
		return
	}

	// 图片解析
	if data.Type == "image" {
		msg.ReplyText(fmt.Sprintf("解析类型: %s\n解析时长: %f\n图片ID: %s\n图片描述: %s\n作者昵称: %s\n作者ID: %s\n", data.Type, data.TotalTime, data.AwemeID, data.Desc, data.Author.Nickname, data.Author.UID))

		for _, imageUrl := range data.ImageData.NoWatermarkImageList {
			image, err := DownloadPic(imageUrl)
			if err != nil {
				msg.ReplyText(fmt.Sprintf("下载图片失败, 失败原因: %s", err.Error()))
				return
			}

			msg.ReplyImage(image)
		}

		return
	}

	// 视频解析
	if data.Type == "video" {
		msg.ReplyText(fmt.Sprintf("解析类型: %s\n解析时长: %f\n视频ID: %s\n视频描述: %s\n作者昵称: %s\n作者ID: %s\n", data.Type, data.TotalTime, data.AwemeID, data.Desc, data.Author.Nickname, data.Author.UID))

		video, err := DownloadVideo(data.VideoData.NwmVideoURLHQ)
		if err != nil {
			msg.ReplyText(fmt.Sprintf("下载视频失败, 失败原因: %s", err.Error()))
			return
		}

		msg.ReplyVideo(video)
		return
	}
}

// GetDouYinUrlInfo 获取抖音链接信息
// Author: NothAmor
func GetDouYinUrlInfo(url string) (resolutionResponse structs.ResolutionResponse, err error) {
	// 拼接GET链接，请求API服务
	resolutionApiUrl := fmt.Sprintf("%s://%s:%s/%s?url=%s", global.Config.DouYin.Protocol, global.Config.DouYin.Address, global.Config.DouYin.Port, global.Config.DouYin.Router.Api, url)

	client := &http.Client{}
	req, err := http.NewRequest("GET", resolutionApiUrl, nil)
	if err != nil {
		err = fmt.Errorf("请求链接错误: %s", err)
		return
	}

	resp, err := client.Do(req)
	if err != nil {
		err = fmt.Errorf("请求链接错误: %s", err)
		return
	}

	defer resp.Body.Close()

	err = json.NewDecoder(resp.Body).Decode(&resolutionResponse)
	if err != nil {
		err = fmt.Errorf("解析返回数据错误: %s", err)
		return
	}

	if resolutionResponse.Status != "success" {
		err = fmt.Errorf("解析返回数据错误: %s", resolutionResponse.Message)
		return
	}

	return
}

// DownloadPic 下载图片
// Author: NothAmor
func DownloadPic(url string) (image *os.File, err error) {
	resp, err := http.Get(url)
	if err != nil {
		err = fmt.Errorf("请求链接错误: %s", err)
		return
	}
	defer resp.Body.Close()

	imageBytes, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		err = fmt.Errorf("读取返回数据错误: %s", err)
		return
	}

	tmpFile, err := ioutil.TempFile("", "image*.jpg")
	if err != nil {
		err = fmt.Errorf("创建临时文件错误: %s", err)
		return
	}
	defer tmpFile.Close()

	_, err = tmpFile.Write(imageBytes)
	if err != nil {
		err = fmt.Errorf("写入临时文件错误: %s", err)
		return
	}

	_, err = tmpFile.Seek(0, 0)
	if err != nil {
		err = fmt.Errorf("设置临时文件指针错误: %s", err)
		return
	}

	return tmpFile, nil
}

// DownloadVideo 下载视频
// Author: NothAmor
func DownloadVideo(url string) (video *os.File, err error) {
	resp, err := http.Get(url)
	if err != nil {
		err = fmt.Errorf("请求链接错误: %s", err)
		return
	}
	defer resp.Body.Close()

	videoBytes, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		err = fmt.Errorf("读取返回数据错误: %s", err)
		return
	}

	tmpFile, err := ioutil.TempFile("", "video*.mp4")
	if err != nil {
		err = fmt.Errorf("创建临时文件错误: %s", err)
		return
	}
	defer tmpFile.Close()

	_, err = tmpFile.Write(videoBytes)
	if err != nil {
		err = fmt.Errorf("写入临时文件错误: %s", err)
		return
	}

	_, err = tmpFile.Seek(0, 0)
	if err != nil {
		err = fmt.Errorf("设置临时文件指针错误: %s", err)
		return
	}

	return tmpFile, nil
}