package lib

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
)

// 抖音
type Douyin struct {
	ClientKey    string
	ClientSecret string
}

func NewDouyin(clientKey, clientSecret string) (*Douyin, error) {
	m := &Douyin{
		ClientKey:    clientKey,
		ClientSecret: clientSecret,
	}
	return m, nil
}

// 获取 access_token
func (this *Douyin) GetAccessToken(code string) (string, error) {
	url := "https://open.douyin.com/oauth/access_token/"

	// 构建请求参数
	params := map[string]interface{}{
		"grant_type":    "authorization_code",
		"client_key":    this.ClientKey,
		"client_secret": this.ClientSecret,
		"code":          code,
	}

	// 创建HTTP请求的body
	jsonParams, err := json.Marshal(params)
	requestBody := bytes.NewBuffer(jsonParams)

	// 创建POST请求
	req, err := http.NewRequest("POST", url, requestBody)
	if err != nil {
		fmt.Println("创建请求失败：", err)
		return "", err
	}
	// 设置请求头
	req.Header.Set("Content-Type", "application/json")
	// 发送请求
	client := http.Client{}
	response, err := client.Do(req)
	if err != nil {
		fmt.Println("发送请求失败：", err)
		return "", err
	}

	defer response.Body.Close()

	// 读取响应
	responseBody, err := ioutil.ReadAll(response.Body)
	if err != nil {
		return "", err
	}
	return string(responseBody), nil
}

// accessToken续期
func (this *Douyin) RefeshAccessToken(accessToken string) (string, error) {
	return accessToken, nil
}

// 刷新accessToken
func (this *Douyin) RefeshNewAccessToken(refreshAccessToken string) (string, error) {
	url := "https://open.douyin.com/oauth/refresh_token/"

	// 构建请求参数
	params := fmt.Sprintf("client_key=%s&refresh_token=%s&grant_type=refresh_token", this.ClientKey, refreshAccessToken)
	// 创建HTTP请求的body
	requestBody := bytes.NewBuffer([]byte(params))

	// 创建POST请求
	req, err := http.NewRequest("POST", url, requestBody)
	if err != nil {
		fmt.Println("创建请求失败：", err)
		return "", err
	}
	// 设置请求头
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	// 发送请求
	client := http.Client{}
	response, err := client.Do(req)
	if err != nil {
		fmt.Println("发送请求失败：", err)
		return "", err
	}

	defer response.Body.Close()

	// 读取响应
	responseBody, err := ioutil.ReadAll(response.Body)
	if err != nil {
		return "", err
	}
	return string(responseBody), nil
}

// 刷新refreshToken
func (this *Douyin) RenewRefreshToken(refreshToken string) (string, error) {
	url := "https://open.douyin.com/oauth/renew_refresh_token/"

	// 构建请求参数
	params := fmt.Sprintf("client_key=%s&refresh_token=%s", this.ClientKey, refreshToken)
	// 创建HTTP请求的body
	requestBody := bytes.NewBuffer([]byte(params))

	// 创建POST请求
	req, err := http.NewRequest("POST", url, requestBody)
	if err != nil {
		fmt.Println("创建请求失败：", err)
		return "", err
	}
	// 设置请求头
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	// 发送请求
	client := http.Client{}
	response, err := client.Do(req)
	if err != nil {
		fmt.Println("发送请求失败：", err)
		return "", err
	}

	defer response.Body.Close()

	// 读取响应
	responseBody, err := ioutil.ReadAll(response.Body)
	if err != nil {
		return "", err
	}
	return string(responseBody), nil
}

// 获取用户信息
func (this *Douyin) GetUserInfo(access_token, open_id string) (string, error) {
	url := "https://open.douyin.com/oauth/userinfo/"

	// 构建请求参数
	params := fmt.Sprintf("access_token=%s&open_id=%s", access_token, open_id)
	// 创建HTTP请求的body
	requestBody := bytes.NewBuffer([]byte(params))

	// 创建POST请求
	req, err := http.NewRequest("POST", url, requestBody)
	if err != nil {
		fmt.Println("创建请求失败：", err)
		return "", err
	}
	// 设置请求头
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	// 发送请求
	client := http.Client{}
	response, err := client.Do(req)
	if err != nil {
		fmt.Println("发送请求失败：", err)
		return "", err
	}

	defer response.Body.Close()

	// 读取响应
	responseBody, err := ioutil.ReadAll(response.Body)
	if err != nil {
		return "", err
	}
	return string(responseBody), nil
}

// 回复视频评论
func (this *Douyin) ReplyVideoComment(access_token, open_id, content, videoId, comment_id string) (string, error) {
	url := "https://open.douyin.com/item/comment/reply/?open_id=" + open_id

	// 构建请求参数
	params := map[string]interface{}{
		"content":    content,
		"item_id":    videoId,
		"comment_id": comment_id,
	}

	// 创建HTTP请求的body
	jsonParams, err := json.Marshal(params)
	requestBody := bytes.NewBuffer(jsonParams)
	log.Println("调用抖音回复评论接口：", string(jsonParams))
	// 创建POST请求
	req, err := http.NewRequest("POST", url, requestBody)
	if err != nil {
		fmt.Println("创建请求失败：", err)
		return "", err
	}
	// 设置请求头
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("access-token", access_token)
	// 发送请求
	client := http.Client{}
	response, err := client.Do(req)
	if err != nil {
		fmt.Println("发送请求失败：", err)
		return "", err
	}

	defer response.Body.Close()

	// 读取响应
	responseBody, err := ioutil.ReadAll(response.Body)
	if err != nil {
		return "", err
	}
	return string(responseBody), nil
}

// 发送私信
func (this *Douyin) ReplyMessage(access_token, eventType, open_id, to_user_id, conversation_id, msg_id, content string) (string, error) {
	url := "https://open.douyin.com/im/send/msg/?open_id=" + open_id

	// 构建请求参数
	params := map[string]interface{}{
		"content": map[string]interface{}{
			"msg_type": 1,
			"text": map[string]interface{}{
				"text": content,
			},
		},
		"scene":           eventType,
		"conversation_id": conversation_id,
		"msg_id":          msg_id,
		"to_user_id":      to_user_id,
	}

	// 创建HTTP请求的body
	jsonParams, err := json.Marshal(params)
	requestBody := bytes.NewBuffer(jsonParams)
	log.Println("调用抖音私信接口：", string(jsonParams))
	// 创建POST请求
	req, err := http.NewRequest("POST", url, requestBody)
	if err != nil {
		fmt.Println("创建请求失败：", err)
		return "", err
	}
	// 设置请求头
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("access-token", access_token)
	// 发送请求
	client := http.Client{}
	response, err := client.Do(req)
	if err != nil {
		fmt.Println("发送请求失败：", err)
		return "", err
	}

	defer response.Body.Close()

	// 读取响应
	responseBody, err := ioutil.ReadAll(response.Body)
	if err != nil {
		return "", err
	}
	return string(responseBody), nil
}