304 lines
10 KiB
JavaScript
304 lines
10 KiB
JavaScript
'use client';
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import { useEffect, useRef, useState } from 'react';
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import { useRouter } from 'next/navigation';
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// ── 星空Canvas ──────────────────────────────────────────
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function Starfield() {
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const canvasRef = useRef(null);
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useEffect(() => {
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const canvas = canvasRef.current;
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const ctx = canvas.getContext('2d');
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let animId;
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const STARS = 180;
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const stars = Array.from({ length: STARS }, () => ({
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x: Math.random() * window.innerWidth,
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y: Math.random() * window.innerHeight,
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z: Math.random() * window.innerWidth,
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pz: 0,
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}));
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const resize = () => {
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canvas.width = window.innerWidth;
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canvas.height = window.innerHeight;
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};
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resize();
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window.addEventListener('resize', resize);
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const cx = () => canvas.width / 2;
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const cy = () => canvas.height / 2;
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const tick = () => {
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ctx.fillStyle = 'rgba(5,3,15,0.25)';
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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stars.forEach((s) => {
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s.pz = s.z;
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s.z -= 4;
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if (s.z <= 0) {
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s.x = Math.random() * canvas.width;
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s.y = Math.random() * canvas.height;
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s.z = canvas.width;
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s.pz = s.z;
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}
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const sx = (s.x - cx()) * (canvas.width / s.z) + cx();
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const sy = (s.y - cy()) * (canvas.width / s.z) + cy();
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const px = (s.x - cx()) * (canvas.width / s.pz) + cx();
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const py = (s.y - cy()) * (canvas.width / s.pz) + cy();
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const size = Math.max(0.3, (1 - s.z / canvas.width) * 2.5);
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const alpha = 1 - s.z / canvas.width;
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ctx.strokeStyle = `rgba(200,190,255,${alpha})`;
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ctx.lineWidth = size;
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ctx.beginPath();
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ctx.moveTo(px, py);
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ctx.lineTo(sx, sy);
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ctx.stroke();
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});
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animId = requestAnimationFrame(tick);
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};
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tick();
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return () => {
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cancelAnimationFrame(animId);
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window.removeEventListener('resize', resize);
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};
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}, []);
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return (
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<canvas
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ref={canvasRef}
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className="fixed inset-0 z-0"
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style={{ background: '#05030f' }}
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/>
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);
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}
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// ── 淡入淡出文字组件 ──────────────────────────────────────
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function FadeText({ text, visible, className = '' }) {
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return (
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<div
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className={`transition-all duration-1000 ${className}`}
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style={{ opacity: visible ? 1 : 0, transform: visible ? 'translateY(0)' : 'translateY(12px)' }}
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>
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{text}
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</div>
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);
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}
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// ── 开场序列 ──────────────────────────────────────────────
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function Intro({ onDone }) {
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const [phase, setPhase] = useState(0);
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// 0: 黑 → 1: 灵镜出现 → 2: 灵镜消失 → 3: 副标题出现 → 4: 副标题消失 → 5: 按钮出现
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useEffect(() => {
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const timers = [
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setTimeout(() => setPhase(1), 600),
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setTimeout(() => setPhase(2), 2200),
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setTimeout(() => setPhase(3), 3000),
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setTimeout(() => setPhase(4), 4800),
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setTimeout(() => setPhase(5), 5600),
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];
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return () => timers.forEach(clearTimeout);
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}, []);
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return (
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<div className="relative z-10 flex h-screen h-dvh flex-col items-center justify-center px-8 text-center">
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<FadeText
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text="灵镜"
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visible={phase === 1 || phase === 2}
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className="text-5xl font-light tracking-[0.3em] text-white/90"
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/>
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<FadeText
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text="一场温柔但有穿透力的对话"
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visible={phase === 3 || phase === 4}
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className="text-lg font-light tracking-widest text-white/60"
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/>
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<div
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className="transition-all duration-1000"
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style={{ opacity: phase >= 5 ? 1 : 0, transform: phase >= 5 ? 'translateY(0)' : 'translateY(12px)' }}
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>
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<button
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onClick={onDone}
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style={{ color: 'white', textDecoration: 'underline', textUnderlineOffset: '4px', fontSize: '0.875rem', letterSpacing: '0.2em', background: 'none', border: 'none', cursor: 'pointer' }}
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>
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开始探索
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</button>
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</div>
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</div>
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);
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}
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// ── 单问题沉浸视图 ────────────────────────────────────────
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function QuestionView({ question, onAnswer, questionIndex, total }) {
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const [visible, setVisible] = useState(false);
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const [input, setInput] = useState('');
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const [leaving, setLeaving] = useState(false);
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const inputRef = useRef(null);
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useEffect(() => {
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setVisible(false);
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setInput('');
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setLeaving(false);
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const t = setTimeout(() => {
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setVisible(true);
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setTimeout(() => inputRef.current?.focus(), 600);
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}, 100);
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return () => clearTimeout(t);
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}, [question]);
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const submit = () => {
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if (!input.trim()) return;
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setLeaving(true);
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setTimeout(() => onAnswer(input.trim()), 800);
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};
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return (
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<div className="chat-page relative z-10 flex h-screen h-dvh flex-col items-center justify-center px-8">
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<div className="w-full max-w-md space-y-8">
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{/* 问题 */}
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<div
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className="text-center text-lg font-light leading-relaxed tracking-wide text-white/85 transition-all duration-700"
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style={{
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opacity: visible && !leaving ? 1 : 0,
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transform: visible && !leaving ? 'translateY(0)' : leaving ? 'translateY(-16px)' : 'translateY(16px)',
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}}
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>
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{question}
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</div>
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{/* 输入 */}
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<div
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className="transition-all duration-700"
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style={{
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opacity: visible && !leaving ? 1 : 0,
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transform: visible && !leaving ? 'translateY(0)' : 'translateY(16px)',
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}}
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>
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<textarea
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ref={inputRef}
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rows={3}
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value={input}
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onChange={(e) => setInput(e.target.value)}
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onKeyDown={(e) => {
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if (e.key === 'Enter' && !e.shiftKey) {
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e.preventDefault();
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submit();
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}
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}}
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placeholder="输入你的回答，或输入 跳过"
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className="w-full resize-none rounded-2xl border border-white/10 bg-white/5 px-5 py-4 text-sm text-white/80 placeholder-white/20 outline-none focus:border-white/25 transition-colors"
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/>
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<div className="mt-4 flex justify-center">
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<button
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type="button"
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onClick={submit}
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disabled={!input.trim()}
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className="continue-btn !text-white underline underline-offset-4 text-sm tracking-widest disabled:opacity-100"
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style={{
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color: '#fff',
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background: 'none',
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border: 'none',
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cursor: input.trim() ? 'pointer' : 'not-allowed',
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letterSpacing: '0.1em'
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}}
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>
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继续 →
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</button>
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</div>
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</div>
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</div>
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</div>
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);
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}
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// ── 主页面 ────────────────────────────────────────────────
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export default function ChatPage() {
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const [stage, setStage] = useState('intro'); // intro | chat | waiting | loading | done
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const [question, setQuestion] = useState('');
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const [qIndex, setQIndex] = useState(0);
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const [total, setTotal] = useState(30);
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const [sid, setSid] = useState('');
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const router = useRouter();
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const startChat = async () => {
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setStage('loading');
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try {
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const r = await fetch('/api/session/new', { method: 'POST' });
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const d = await r.json();
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setSid(d.sessionId);
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localStorage.setItem('lingjing_sid', d.sessionId);
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setQuestion(d.opening);
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setQIndex(1);
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setTotal(d.total || 30);
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setStage('chat');
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} catch {
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setStage('chat');
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setQuestion('开始前，我想先简单认识你一下。就像朋友聊天，想到什么说什么就行，没有标准答案。咱们先从几个轻松的小问题开始，可以吗？');
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setQIndex(1);
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}
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};
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const handleAnswer = async (answer) => {
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setStage('waiting'); // 显示探索中
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try {
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const r = await fetch('/api/chat', {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ sessionId: sid, answer }),
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});
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const d = await r.json();
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if (d.done) {
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setStage('done');
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const targetSid = d.sessionId || sid;
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setTimeout(() => router.push(`/waiting?sessionId=${encodeURIComponent(targetSid || '')}`), 1200);
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return;
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}
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setQuestion(d.reply);
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setQIndex((i) => i + 1);
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setStage('chat');
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} catch {
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setQuestion('网络有点问题，我们继续。你刚才的回答我已经记住了。');
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setQIndex((i) => i + 1);
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setStage('chat');
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}
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};
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return (
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<>
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<Starfield />
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{stage === 'intro' && <Intro onDone={startChat} />}
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{stage === 'waiting' && (
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<div className="relative z-10 flex h-screen h-dvh items-center justify-center">
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<div
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className="text-base tracking-[0.3em] text-white/60"
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style={{ animation: 'breathe 2.4s ease-in-out infinite' }}
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>
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探索中……
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</div>
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<style>{`
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@keyframes breathe {
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0%, 100% { opacity: 0.2; }
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50% { opacity: 0.9; }
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}
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`}</style>
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</div>
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)}
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{stage === 'loading' && (
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<div className="relative z-10 flex h-screen h-dvh items-center justify-center">
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<div className="text-sm tracking-widest text-white/30 animate-pulse">正在连接...</div>
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</div>
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)}
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{stage === 'chat' && (
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<QuestionView
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question={question}
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onAnswer={handleAnswer}
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questionIndex={qIndex}
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total={total}
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/>
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)}
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{stage === 'done' && (
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<div className="relative z-10 flex h-screen h-dvh items-center justify-center">
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<div className="text-sm tracking-widest text-white/30 animate-pulse">正在生成你的报告...</div>
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</div>
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)}
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</>
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);
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}
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