package chatimpl

// * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// * Copyright 2023 The Geek-AI Authors. All rights reserved.
// * Use of this source code is governed by a Apache-2.0 license
// * that can be found in the LICENSE file.
// * @Author yangjian102621@163.com
// * +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

import (
	"bufio"
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"geekai/core/types"
	"geekai/store/model"
	"geekai/store/vo"
	"geekai/utils"
	"io"
	"strings"
	"time"
)

// 微软 Azure 模型消息发送实现

func (h *ChatHandler) sendAzureMessage(
	chatCtx []types.Message,
	req types.ApiRequest,
	userVo vo.User,
	ctx context.Context,
	session *types.ChatSession,
	role model.ChatRole,
	prompt string,
	ws *types.WsClient) error {
	promptCreatedAt := time.Now() // 记录提问时间
	start := time.Now()
	var apiKey = model.ApiKey{}
	response, err := h.doRequest(ctx, req, session, &apiKey)
	logger.Info("HTTP请求完成，耗时：", time.Now().Sub(start))
	if err != nil {
		if strings.Contains(err.Error(), "context canceled") {
			return fmt.Errorf("用户取消了请求：%s", prompt)
		} else if strings.Contains(err.Error(), "no available key") {
			return errors.New("抱歉😔😔😔，系统已经没有可用的 API KEY，请联系管理员！")
		}
		return err
	} else {
		defer response.Body.Close()
	}

	contentType := response.Header.Get("Content-Type")
	if strings.Contains(contentType, "text/event-stream") {
		replyCreatedAt := time.Now() // 记录回复时间
		// 循环读取 Chunk 消息
		var message = types.Message{}
		var contents = make([]string, 0)
		scanner := bufio.NewScanner(response.Body)
		for scanner.Scan() {
			line := scanner.Text()
			if !strings.Contains(line, "data:") || len(line) < 30 {
				continue
			}

			var responseBody = types.ApiResponse{}
			err = json.Unmarshal([]byte(line[6:]), &responseBody)
			if err != nil { // 数据解析出错
				return errors.New(line)
			}

			if len(responseBody.Choices) == 0 {
				continue
			}

			// 初始化 role
			if responseBody.Choices[0].Delta.Role != "" && message.Role == "" {
				message.Role = responseBody.Choices[0].Delta.Role
				utils.ReplyChunkMessage(ws, types.WsMessage{Type: types.WsStart})
				continue
			} else if responseBody.Choices[0].FinishReason != "" {
				break // 输出完成或者输出中断了
			} else {
				content := responseBody.Choices[0].Delta.Content
				contents = append(contents, utils.InterfaceToString(content))
				utils.ReplyChunkMessage(ws, types.WsMessage{
					Type:    types.WsMiddle,
					Content: utils.InterfaceToString(responseBody.Choices[0].Delta.Content),
				})
			}
		} // end for

		if err := scanner.Err(); err != nil {
			if strings.Contains(err.Error(), "context canceled") {
				logger.Info("用户取消了请求：", prompt)
			} else {
				logger.Error("信息读取出错：", err)
			}
		}

		// 消息发送成功
		if len(contents) > 0 {
			h.saveChatHistory(req, prompt, contents, message, chatCtx, session, role, userVo, promptCreatedAt, replyCreatedAt)
		}

	} else {
		body, _ := io.ReadAll(response.Body)
		return fmt.Errorf("请求大模型 API 失败：%s", body)
	}

	return nil
}