318 lines
13 KiB
TypeScript
318 lines
13 KiB
TypeScript
"use client";
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import { FormEvent, useEffect, useRef, useState } from "react";
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import {
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BookOpenCheck,
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MessageCircle,
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Plus,
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SendHorizonal,
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ShieldCheck,
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} from "lucide-react";
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import { api } from "@/lib/api";
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import type { CallableQAItem } from "@/lib/types";
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import {
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createEmptySession,
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findQaAnswer,
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initialMessages,
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suggestedQuestions,
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summarizeSession,
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type ChatSession,
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type ChatMessage
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} from "@/lib/h5MockQa";
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import ChatBubble from "./ChatBubble";
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const STORAGE_KEY = "hy-qa-h5-sessions";
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const SHOW_AUTH_ENTRY = false;
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const SHOW_HISTORY_AND_PROFILE = false;
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function nowText() {
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return new Intl.DateTimeFormat("zh-CN", {
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hour: "2-digit",
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minute: "2-digit",
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hour12: false
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}).format(new Date());
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}
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function buildAnswerMessage(question: string, qa: CallableQAItem): ChatMessage {
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return {
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id: `assistant-${Date.now()}`,
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role: "assistant",
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content: qa.standard_answer,
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source: `${qa.standard_code} / ${qa.primary_topic} / ${qa.course_stage}`,
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boundary: qa.answer_boundary ?? "答复仅基于已审核答疑资产生成，不能替代专业诊断、法律判断或医疗建议。",
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createdAt: nowText()
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};
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}
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function buildUnavailableMessage(reason: "loading" | "empty" | "error"): ChatMessage {
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const content = {
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loading: "我还在连接可调用问答库，请稍等几秒后再试。",
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empty: "当前可调用问答库还没有可用内容。请先到后台标准问答库中，把已审核、低/中风险、已脱敏或无需脱敏的问答标记为“可调用”。",
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error: "暂时连接不到后端可调用库，请检查后端服务或网络连接后再试。"
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}[reason];
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return {
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id: `assistant-unavailable-${Date.now()}`,
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role: "assistant",
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content,
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boundary: "H5 端不会使用未审核或不可调用的内容生成回答。",
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createdAt: nowText()
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};
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}
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export default function H5QAExperience() {
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const [input, setInput] = useState("");
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const [messages, setMessages] = useState<ChatMessage[]>(initialMessages);
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const [sessions, setSessions] = useState<ChatSession[]>([]);
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const [currentSessionId, setCurrentSessionId] = useState("");
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const [callableQa, setCallableQa] = useState<CallableQAItem[]>([]);
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const [loadingQa, setLoadingQa] = useState(true);
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const [qaLoadError, setQaLoadError] = useState<string | null>(null);
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const [copiedMessageId, setCopiedMessageId] = useState<string | null>(null);
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const bottomRef = useRef<HTMLDivElement | null>(null);
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const qaStatusText = loadingQa ? "正在连接可调用库" : qaLoadError ? "后端连接异常" : callableQa.length > 0 ? "已连接可调用库" : "可调用库为空";
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useEffect(() => {
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const fallback = createEmptySession();
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try {
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const saved = window.localStorage.getItem(STORAGE_KEY);
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const parsed = saved ? (JSON.parse(saved) as ChatSession[]) : [];
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const validSessions = parsed.length > 0 ? parsed : [fallback];
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setSessions(validSessions);
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setCurrentSessionId(validSessions[0].id);
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setMessages(validSessions[0].messages);
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} catch {
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setSessions([fallback]);
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setCurrentSessionId(fallback.id);
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setMessages(fallback.messages);
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}
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}, []);
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useEffect(() => {
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if (sessions.length > 0) {
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window.localStorage.setItem(STORAGE_KEY, JSON.stringify(sessions));
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}
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}, [sessions]);
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useEffect(() => {
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api
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.get<CallableQAItem[]>("/standard-qa/callable")
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.then((items) => {
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setCallableQa(items);
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setQaLoadError(null);
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})
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.catch((error) => {
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setCallableQa([]);
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setQaLoadError(error instanceof Error ? error.message : "可调用库接口请求失败");
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})
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.finally(() => setLoadingQa(false));
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}, []);
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useEffect(() => {
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bottomRef.current?.scrollIntoView({ behavior: "smooth", block: "end" });
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}, [messages]);
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function persistMessages(nextMessages: ChatMessage[]) {
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setMessages(nextMessages);
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setSessions((current) => {
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const sessionId = currentSessionId || createEmptySession().id;
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const nextSession = summarizeSession(sessionId, nextMessages);
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const withoutCurrent = current.filter((session) => session.id !== sessionId);
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return [nextSession, ...withoutCurrent].slice(0, 20);
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});
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}
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function startNewSession() {
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const nextSession = createEmptySession();
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setCurrentSessionId(nextSession.id);
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setMessages(nextSession.messages);
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setSessions((current) => [nextSession, ...current].slice(0, 20));
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}
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async function copyMessage(message: ChatMessage) {
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try {
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await navigator.clipboard.writeText(message.content);
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} catch {
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// Some embedded webviews/headless browsers block clipboard writes.
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// Keep the UI feedback so the user knows the copy action was triggered.
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}
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setCopiedMessageId(message.id);
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window.setTimeout(() => setCopiedMessageId(null), 1400);
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}
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function setFeedback(messageId: string, feedback: "liked" | "disliked") {
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const nextMessages = messages.map((message) =>
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message.id === messageId ? { ...message, feedback: message.feedback === feedback ? undefined : feedback } : message
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);
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persistMessages(nextMessages);
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}
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function ask(question: string) {
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const trimmed = question.trim();
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if (!trimmed) return;
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const matchedQa = findQaAnswer(trimmed, callableQa);
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const timestamp = Date.now();
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const assistantMessage = loadingQa
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? buildUnavailableMessage("loading")
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: qaLoadError
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? buildUnavailableMessage("error")
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: matchedQa
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? { ...buildAnswerMessage(trimmed, matchedQa), id: `assistant-${timestamp}` }
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: buildUnavailableMessage("empty");
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const nextMessages: ChatMessage[] = [
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...messages,
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{
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id: `user-${timestamp}`,
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role: "user",
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content: trimmed,
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createdAt: nowText()
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},
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assistantMessage
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];
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persistMessages(nextMessages);
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setInput("");
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}
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function submit(event: FormEvent<HTMLFormElement>) {
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event.preventDefault();
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ask(input);
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}
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return (
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<div className="min-h-screen bg-[#eef3f1] text-ink lg:grid lg:grid-cols-[minmax(0,1fr)_420px_minmax(0,1fr)]">
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<aside className="hidden px-8 py-10 lg:block">
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<div className="sticky top-10 ml-auto max-w-sm">
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<div className="mb-5 flex items-center gap-3">
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<BookOpenCheck className="h-7 w-7 text-jade" aria-hidden />
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<div>
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<div className="text-lg font-semibold">千问千答 H5</div>
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<div className="text-sm text-slate-500">手机优先的问答交互入口</div>
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</div>
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</div>
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<div className="space-y-3 text-sm leading-6 text-slate-600">
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<p>一期用户端先免登录使用，H5 只保留问答主链路，降低首次体验门槛。</p>
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<p>登录、历史记录和个人中心已预留实现，等后端用户体系和会话接口确定后再打开。</p>
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</div>
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</div>
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</aside>
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<main className="mx-auto flex min-h-screen w-full max-w-[430px] flex-col bg-[#f7faf8] shadow-2xl shadow-slate-900/10 lg:my-6 lg:min-h-[860px] lg:overflow-hidden lg:rounded-[22px]">
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<header className="shrink-0 border-b border-line bg-white px-4 pb-3 pt-4">
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<div className="flex items-center justify-between gap-3">
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<div className="flex items-center gap-3">
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<div className="flex h-10 w-10 items-center justify-center rounded-md bg-jade text-white">
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<MessageCircle className="h-5 w-5" aria-hidden />
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</div>
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<div>
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<h1 className="text-lg font-semibold leading-6">千问千答助手</h1>
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<div className="mt-0.5 flex items-center gap-1 text-xs text-slate-500">
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<ShieldCheck className="h-3.5 w-3.5 text-jade" aria-hidden />
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{qaStatusText}
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</div>
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</div>
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</div>
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{SHOW_AUTH_ENTRY ? null : null}
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</div>
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<div className="mt-3 flex items-center justify-between gap-2">
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<button
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onClick={startNewSession}
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className="inline-flex h-8 items-center gap-1 rounded-md border border-line px-2 text-xs font-medium text-slate-600 hover:bg-slate-50"
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>
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<Plus className="h-3.5 w-3.5" aria-hidden />
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新问答
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</button>
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{copiedMessageId ? <span className="text-xs text-jade">已复制回答</span> : null}
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</div>
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</header>
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<section className="relative flex min-h-0 flex-1 flex-col">
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<div className="flex-1 overflow-y-auto px-4 py-4">
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<div className="mb-4 rounded-md border border-teal-100 bg-teal-50 px-3 py-2 text-xs leading-5 text-teal-800">
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一期免登录试用；回答会优先遵守审核边界，涉及医疗、法律、极端风险或个人隐私时，请以人工复核为准。
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</div>
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{!loadingQa && (qaLoadError || callableQa.length === 0) ? (
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<div className="mb-4 rounded-md border border-amber-200 bg-amber-50 px-3 py-2 text-xs leading-5 text-amber-800">
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{qaLoadError ? `可调用库接口异常：${qaLoadError}` : "当前后端可调用库为空，H5 不会用本地 mock 内容代替真实答案。"}
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</div>
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) : null}
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<div className="space-y-4">
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{messages.map((message) => (
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<ChatBubble key={message.id} message={message} onCopy={copyMessage} onFeedback={setFeedback} />
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))}
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</div>
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<div ref={bottomRef} />
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</div>
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<div className="shrink-0 border-t border-line bg-white px-4 py-3">
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<div className="mb-3 flex gap-2 overflow-x-auto pb-1">
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{suggestedQuestions.map((item) => (
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<button
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key={item.id}
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onClick={() => ask(item.text)}
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className="shrink-0 rounded-md border border-line bg-panel px-3 py-2 text-left text-xs leading-5 text-slate-700 hover:bg-teal-50 hover:text-jade"
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>
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{item.text}
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</button>
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))}
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</div>
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<form onSubmit={submit} className="flex items-end gap-2">
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<textarea
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value={input}
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onChange={(event) => setInput(event.target.value)}
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rows={1}
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placeholder="输入你的问题..."
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className="max-h-28 min-h-11 flex-1 resize-none rounded-md border border-line bg-panel px-3 py-3 text-[15px] leading-5 outline-none focus:border-jade focus:bg-white"
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/>
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<button
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type="submit"
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disabled={!input.trim()}
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className="flex h-11 w-11 shrink-0 items-center justify-center rounded-md bg-jade text-white hover:bg-teal-800 disabled:bg-slate-300"
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aria-label="发送"
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>
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<SendHorizonal className="h-5 w-5" aria-hidden />
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</button>
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</form>
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{SHOW_HISTORY_AND_PROFILE ? (
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<div className="mt-3 rounded-md bg-panel px-3 py-2 text-xs text-slate-500">
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登录、历史记录和个人中心入口已隐藏，二期接入用户体系后恢复。
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</div>
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) : null}
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</div>
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</section>
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{SHOW_HISTORY_AND_PROFILE ? (
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<nav className="hidden h-[62px] shrink-0 grid-cols-3 border-t border-line bg-white text-xs">
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{[
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{ label: "问答" },
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{ label: "记录" },
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{ label: "我的" }
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].map((item) => (
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<button
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key={item.label}
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className="flex flex-col items-center justify-center gap-1 text-slate-400"
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type="button"
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>
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<span>{item.label}</span>
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</button>
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))}
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</nav>
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) : null}
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</main>
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<aside className="hidden px-8 py-10 lg:block">
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<div className="sticky top-10 max-w-sm rounded-md border border-line bg-white p-5 shadow-sm">
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<h2 className="text-base font-semibold">一期用户端范围</h2>
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<ul className="mt-4 space-y-3 text-sm leading-6 text-slate-600">
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<li>免登录进入 H5，优先验证问答主体验。</li>
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<li>问答只读取后端已审核可调用库，不使用本地 mock 答案。</li>
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<li>登录、会话记录、个人中心暂不展示，等后端用户体系确定后再开放。</li>
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<li>后续智能体接口会替代当前前端匹配逻辑，由后端负责检索和大模型调用。</li>
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</ul>
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</div>
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</aside>
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</div>
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);
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}
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