'use strict';
const axios = require('axios');

class AiInspect {
    /**
     * 构造函数
     * @param {object} config
     * @param {string} config.apiKey - Dify API Key
     * @param {string} config.chatflowId - ChatFlow ID
     * @param {string} [config.baseUrl=https://api.dify.ai/v1] - Dify API 接口地址
     */
    constructor({ apiKey = 'app-vc7cLDuIRJngvEgQUMBqT3SX', chatflowId = '', baseUrl = 'http://workflow.smartcost.com.cn/v1' }) {
        if (!apiKey) {
            throw new Error('apiKey 不能为空');
        }

        this.apiKey = apiKey;
        this.chatflowId = chatflowId;
        this.baseUrl = baseUrl;
    }

    /**
     * 向 ChatFlow 发送请求
     * @param {string} userInput - 用户输入内容
     * @param {string} [userId='user_123'] - 用户 ID
     * @returns {Promise<object>} - Dify 返回的对象
     */
    async ask(userInput, userId = 'user_123') {
        const url = `${this.baseUrl}/chat-messages`;
        const headers = {
            'Authorization': `Bearer ${this.apiKey}`,
            'Content-Type': 'application/json',
        };

        const body = {
            inputs: {}, // 如果你的 ChatFlow 有 schema，可填写 key-value
            query: userInput,
            response_mode: 'blocking',
            user: userId,
            conversation_id: this.chatflowId,
        };

        try {
            const res = await axios.post(url, body, { headers });
            return res.data;
        } catch (err) {
            console.error('Dify 请求失败:', err.response || err.response.data || err.message);
            throw new Error('Dify 请求失败');
        }
    }
}

module.exports = AiInspect;