<template>
    <div>
        <div class="content-box">
            <pre>{{ streamData }}</pre>
            <span class="dot"></span>
            <span class="dot"></span>
        </div>

        <el-button @click="stopMessage">停止回答</el-button>
    </div>
</template>

<script setup>
    import {getAiChatRecordList} from '@/api/xjc-integratedmachine/common/aiChat.js'
    import { getToken } from '@/utils/auth'

    let data = ref()
    const streamData = ref(''); // 存储流式数据
    const isLoading = ref(false); // 加载状态
    let reader = null; // 读取器实例
    let controller = null; // AbortController用于中止请求


    // 查看所有聊天记录
    list();
    function list() {
        getAiChatRecordList().then(resp =>{
            console.log(resp)
            data.value = resp;
        })
    }

    const sendMessage = async() => {
        try{
            isLoading.value = true;
            streamData.value = ''; // 清空之前的数据

            // 创建AbortController以便可以中止请求
            controller = new AbortController();

            // 请求体
            let form = {
                "content": "你是谁？"
            }
            // 发送fetch请求
            const response = await fetch('/dev-api/ai/chat/stream', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'Authorization': 'Bearer ' + getToken()
                },
                body: JSON.stringify(form)
            });

            // 获取可读流的读取器
            reader = response.body.getReader();
            const decoder = new TextDecoder('utf-8');

            // 循环读取流数据
            while (true) {
                const { done, value } = await reader.read();
                if (done) break; // 如果流读取完成则退出循环

                // 解码并追加数据
                let chunk = decoder.decode(value, { stream: true });
                chunk = chunk.replace(/\n/g, '').replace(/data:/g, '')
                streamData.value += chunk;
            }
        }catch (error) {
            // 如果是手动中止，不显示错误
            if (error.name !== 'AbortError') {
                console.error('流式读取失败:', error);
                streamData.value = 'Error: ' + error.message;
            }
        } finally {
            isLoading.value = false;
        }
    }

    const stopMessage = () => {
        if (reader) {
            // 取消读取
            reader.cancel().catch(() => {});
            reader = null;
        }
        if (controller) {
            // 中止请求
            controller.abort();
            controller = null;
        }
        isLoading.value = false;
    }

    onMounted(()=>{
        sendMessage()
    })

</script>

<script>
    export default {
        name: "chat"
    }
</script>

<style scoped>
    .content-box {
        max-height: 300px;
        overflow-y: auto;
        border: 1px solid #eee;
        padding: 10px;
        margin-top: 10px;
        background: #f9f9f9;
    }
    pre {
        white-space: pre-wrap;
        word-wrap: break-word;
    }
    .dot {
        display: inline-block;
        margin-left: 5px;
        width: 8px;
        height: 8px;
        background-color: #000000;
        border-radius: 50%;
        animation: pulse 1.2s infinite ease-in-out both;
    }
</style>