package tencent

import (
	"context"
	dto "dataengine/model/dto/tencent"
	"encoding/json"
	"fmt"
	"io"
	"net/http"

	"github.com/gogf/gf/v2/frame/g"
)

type oauthService struct{}

var OauthService = new(oauthService)

// RefreshToken 刷新腾讯广告Token
func (s *oauthService) RefreshToken(ctx context.Context, req *dto.RefreshTokenReq) (res *dto.RefreshTokenRes, err error) {
	// 如果请求中没有提供参数，则从配置文件读取
	clientID := req.ClientID
	clientSecret := req.ClientSecret
	refreshToken := req.RefreshToken

	if clientID == "" || clientSecret == "" || refreshToken == "" {
		clientID = g.Cfg().MustGet(ctx, "tencent.oauth.client_id").String()
		clientSecret = g.Cfg().MustGet(ctx, "tencent.oauth.client_secret").String()
		refreshToken = g.Cfg().MustGet(ctx, "tencent.oauth.refresh_token").String()
	}

	url := fmt.Sprintf("https://api.e.qq.com/oauth/refresh_token?client_id=%s&client_secret=%s&refresh_token=%s",
		clientID, clientSecret, refreshToken)

	httpReq, err := http.NewRequestWithContext(ctx, "GET", url, nil)
	if err != nil {
		return nil, fmt.Errorf("创建请求失败: %w", err)
	}

	client := &http.Client{}
	resp, err := client.Do(httpReq)
	if err != nil {
		return nil, fmt.Errorf("请求失败: %w", err)
	}
	defer resp.Body.Close()

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, fmt.Errorf("读取响应失败: %w", err)
	}

	var result struct {
		Code    int    `json:"code"`
		Message string `json:"message"`
		Data    struct {
			AccessToken           string `json:"access_token"`
			RefreshToken          string `json:"refresh_token"`
			AccessTokenExpiresIn  int64  `json:"access_token_expires_in"`
			RefreshTokenExpiresIn int64  `json:"refresh_token_expires_in"`
		} `json:"data"`
	}

	if err := json.Unmarshal(body, &result); err != nil {
		return nil, fmt.Errorf("解析响应失败: %w", err)
	}

	if result.Code != 0 {
		return nil, fmt.Errorf("API错误: code=%d, message=%s", result.Code, result.Message)
	}

	res = &dto.RefreshTokenRes{
		AccessToken:           result.Data.AccessToken,
		RefreshToken:          result.Data.RefreshToken,
		AccessTokenExpiresIn:  result.Data.AccessTokenExpiresIn,
		RefreshTokenExpiresIn: result.Data.RefreshTokenExpiresIn,
	}

	return res, nil
}