package services

import (
	"app/commons/config"
	"app/commons/core"
	"app/commons/core/redisclient"
	"app/commons/model/entity"
	"bytes"
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"net/http"
	"time"
)

// TgPlatformService 平台API客户端服务（调用Vitiens平台接口）
type TgPlatformService struct {
	CommonService
}

// ---- 请求/响应结构体 ----

// oauthLoginRequest OAuth登录请求
type oauthLoginRequest struct {
	Provider   string `json:"provider"`
	OpenId     string `json:"openId"`
	Nickname   string `json:"nickname"`
	Avatar     string `json:"avatar"`
	InviteCode string `json:"inviteCode,omitempty"`
}

// platformAPIResponse 平台API通用响应
type platformAPIResponse struct {
	Code int32           `json:"code"`
	Msg  string          `json:"msg"`
	Data json.RawMessage `json:"data"`
	Time int64           `json:"time"`
}

// oauthLoginData OAuth登录响应data
type oauthLoginData struct {
	Token string        `json:"token"`
	User  oauthUserInfo `json:"user"`
	IsNew bool          `json:"isNew"`
}

// oauthUserInfo 用户信息
type oauthUserInfo struct {
	Id       int64  `json:"id"`
	Uid      string `json:"uid"`
	Nickname string `json:"nickname"`
	Avatar   string `json:"avatar"`
	Phone    string `json:"phone"`
	Email    string `json:"email"`
}

// walletInfoData 钱包信息响应data
type walletInfoData struct {
	Balance         float64 `json:"balance"`
	FrozenBalance   float64 `json:"frozenBalance"`
	TotalRecharge   float64 `json:"totalRecharge"`
	TotalWithdraw   float64 `json:"totalWithdraw"`
	TotalTaskIncome float64 `json:"totalTaskIncome"`
}

// ---- 核心方法 ----

// RegisterAndBind 一键注册并绑定
// 1. 检查是否已绑定 → 已绑定直接返回
// 2. 调用Vitiens平台OAuth接口注册/登录
// 3. 在本地创建绑定记录
func (s *TgPlatformService) RegisterAndBind(telegramId int64, username string, firstName string) (userId int64, isNew bool, err error) {
	bindService := &TgBindService{}

	// 检查是否已绑定
	bound, existUserId := bindService.IsUserBound(telegramId, username)
	if bound {
		return existUserId, false, nil
	}

	// 调用平台OAuth接口
	apiURL := s.getPlatformAPIURL()
	if apiURL == "" {
		return 0, false, errors.New("平台API地址未配置")
	}

	// 构造请求
	nickname := firstName
	if nickname == "" && username != "" {
		nickname = username
	}
	if nickname == "" {
		nickname = fmt.Sprintf("TG_%d", telegramId)
	}

	reqBody := oauthLoginRequest{
		Provider: "telegram",
		OpenId:   fmt.Sprintf("%d", telegramId),
		Nickname: nickname,
	}

	reqBytes, err := json.Marshal(reqBody)
	if err != nil {
		return 0, false, fmt.Errorf("序列化请求失败: %w", err)
	}

	// 发起HTTP请求
	url := fmt.Sprintf("%s/dt/auth/oauth/login", apiURL)
	core.Log.Infof("一键注册 - 调用平台API: %s, telegramId: %d", url, telegramId)

	httpReq, err := http.NewRequest("POST", url, bytes.NewBuffer(reqBytes))
	if err != nil {
		return 0, false, fmt.Errorf("创建请求失败: %w", err)
	}
	httpReq.Header.Set("Content-Type", "application/json")

	client := &http.Client{Timeout: 10 * time.Second}
	resp, err := client.Do(httpReq)
	if err != nil {
		return 0, false, fmt.Errorf("请求平台API失败: %w", err)
	}
	defer resp.Body.Close()

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return 0, false, fmt.Errorf("读取响应失败: %w", err)
	}

	core.Log.Infof("一键注册 - 平台API响应: %s", string(body))

	// 解析响应
	var apiResp platformAPIResponse
	if err := json.Unmarshal(body, &apiResp); err != nil {
		return 0, false, fmt.Errorf("解析响应失败: %w", err)
	}

	if apiResp.Code != 200 {
		return 0, false, fmt.Errorf("平台注册失败: %s", apiResp.Msg)
	}

	var loginData oauthLoginData
	if err := json.Unmarshal(apiResp.Data, &loginData); err != nil {
		return 0, false, fmt.Errorf("解析用户数据失败: %w", err)
	}

	if loginData.User.Id <= 0 {
		return 0, false, errors.New("平台返回的用户ID无效")
	}

	// 创建本地绑定记录
	bind := &entity.TgUserBind{
		UserId:            loginData.User.Id,
		TelegramId:        telegramId,
		TelegramUsername:  username,
		TelegramFirstName: firstName,
		BindStatus:        1,
		BindTime:          time.Now(),
	}
	if err := s.DB().Create(bind).Error; err != nil {
		core.Log.Errorf("一键注册 - 创建绑定记录失败: %v", err)
		return 0, false, fmt.Errorf("绑定失败: %w", err)
	}

	// 设置Redis绑定缓存
	ctx := context.Background()
	rdb := redisclient.DefaultClient()
	cacheKey := fmt.Sprintf("tg_bind_cache:%d", telegramId)
	rdb.Set(ctx, cacheKey, fmt.Sprintf("%d", loginData.User.Id), 1*time.Hour)

	core.Log.Infof("一键注册 - 成功, telegramId: %d, userId: %d, isNew: %v",
		telegramId, loginData.User.Id, loginData.IsNew)

	return loginData.User.Id, loginData.IsNew, nil
}

// GetUserBalance 查询用户余额（通过平台API）
func (s *TgPlatformService) GetUserBalance(platformToken string) (*walletInfoData, error) {
	apiURL := s.getPlatformAPIURL()
	if apiURL == "" {
		return nil, errors.New("平台API地址未配置")
	}

	url := fmt.Sprintf("%s/dt/wallet/info", apiURL)
	httpReq, err := http.NewRequest("GET", url, nil)
	if err != nil {
		return nil, fmt.Errorf("创建请求失败: %w", err)
	}
	httpReq.Header.Set("Authorization", "Bearer "+platformToken)

	client := &http.Client{Timeout: 10 * time.Second}
	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 apiResp platformAPIResponse
	if err := json.Unmarshal(body, &apiResp); err != nil {
		return nil, fmt.Errorf("解析响应失败: %w", err)
	}

	if apiResp.Code != 200 {
		return nil, fmt.Errorf("查询失败: %s", apiResp.Msg)
	}

	var walletData walletInfoData
	if err := json.Unmarshal(apiResp.Data, &walletData); err != nil {
		return nil, fmt.Errorf("解析钱包数据失败: %w", err)
	}

	return &walletData, nil
}

// GetUserGrabRecords 查询用户抢红包记录（本地数据库）
// limit <= 0 时返回全部记录
func (s *TgPlatformService) GetUserGrabRecords(telegramId int64, limit int) ([]entity.TgRedPacketRecord, error) {
	var records []entity.TgRedPacketRecord
	query := s.DB().Where("telegram_id = ?", telegramId).Order("grabbed_at DESC")
	if limit > 0 {
		query = query.Limit(limit)
	}
	err := query.Find(&records).Error
	if err != nil {
		return nil, err
	}
	return records, nil
}

// getPlatformAPIURL 获取平台API地址
func (s *TgPlatformService) getPlatformAPIURL() string {
	telegramConfig := config.EnvConf().Telegram
	if telegramConfig != nil && telegramConfig.PlatformAPIURL != "" {
		return telegramConfig.PlatformAPIURL
	}
	return ""
}