import { useCallback, useEffect, useRef, useState } from 'react'
import { createRoot } from 'react-dom/client'
import './style.css'
import './control.css'

type Settings = { title:string; fontScale:number; showDanmaku:boolean; showEnter:boolean; showGift:boolean; showSuperchat:boolean; showGuard:boolean; showLike:boolean; showShare:boolean; maxVisible:number; collapseAfterSeconds:number; unfoldDurationMs:number; motionIntensity:number; particleCount:number; particleSpeed:number; lowPerformanceMode:boolean; highValueThreshold:number; featuredValueThreshold:number }
type Envelope = { id:string; type:string; payload:any }
type Item = Envelope & { key:string; received:number; decorVariant:number }
type DanmakuSegment = { type:'text'; text:string } | { type:'emoticon'; text:string; unique?:string; url:string; width?:number; height?:number; isDynamic?:boolean; standalone?:boolean }
const defaults: Settings = { title:'洛星瓷专用弹幕猪！', fontScale:140, showDanmaku:true, showEnter:true, showGift:true, showSuperchat:true, showGuard:true, showLike:false, showShare:false, maxVisible:5, collapseAfterSeconds:12, unfoldDurationMs:1000, motionIntensity:70, particleCount:8, particleSpeed:100, lowPerformanceMode:false, highValueThreshold:10000, featuredValueThreshold:100000 }
const cardParticles=['star','floret','star','star','floret','star','floret','star','star','floret','star','floret'] as const
const decorVariantCount=6

function stableHash(value:string) { let hash=2166136261; for(let index=0;index<value.length;index++){hash^=value.charCodeAt(index);hash=Math.imul(hash,16777619)} return hash>>>0 }
function chooseDecorVariant(seed:string,previous?:number) { const hash=stableHash(seed); const base=hash%decorVariantCount; if(previous===undefined||base!==previous)return base; return (base+1+((hash>>>8)%(decorVariantCount-1)))%decorVariantCount }
function CardDecor({count,variant}:{count:number;variant:number}) { const visible=Math.min(cardParticles.length,Math.max(0,Math.round(count||0))); const normalized=((variant%decorVariantCount)+decorVariantCount)%decorVariantCount; return <div className={`card-decor decor-v${normalized}`} aria-hidden="true"><i className="card-decor-surface"/><div className="card-particle-layer">{cardParticles.slice(0,visible).map((kind,index)=><i className={`card-particle ${kind}`} key={`${kind}-${index}`}/>)}</div></div> }

function wsUrl() { const p = new URLSearchParams(location.search); const protocol = location.protocol === 'https:' ? 'wss:' : 'ws:'; return `${protocol}//${location.host}/ws?token=${encodeURIComponent(p.get('token') || '')}` }
function enabled(type:string, s:Settings) { return (type==='live.danmaku'&&s.showDanmaku)||(type==='live.enter'&&s.showEnter)||(type.startsWith('live.gift')&&s.showGift)||(type==='live.superchat'&&s.showSuperchat)||(type==='live.guard.buy'&&s.showGuard)||(type==='live.like'&&s.showLike)||(type==='live.share'&&s.showShare) }
function useEvents(disabled=false) {
 const [settings,setSettings]=useState<Settings>(defaults); const [items,setItems]=useState<Item[]>([]); const [connected,setConnected]=useState(false); const settingsRef=useRef(settings)
 useEffect(()=>{settingsRef.current=settings},[settings])
 useEffect(()=>{ if(disabled)return; let dead=false; let socket:WebSocket|undefined; let timer=0
  const open=()=>{ socket=new WebSocket(wsUrl()); socket.onopen=()=>setConnected(true); socket.onclose=()=>{setConnected(false); if(!dead) timer=window.setTimeout(open,1500)}; socket.onmessage=e=>{ try { const x:Envelope=JSON.parse(e.data); if(x.type==='overlay.settings.snapshot'||x.type==='overlay.settings.updated'){setSettings(x.payload.settings);return} setItems(old=>{ const current=settingsRef.current; if(!enabled(x.type,current))return old; const combo=x.type==='live.gift.combo'&&x.payload.comboId; const key=combo?`combo:${combo}`:x.id; const existing=old.find(v=>v.key===key); const decorVariant=existing?.decorVariant??chooseDecorVariant(`${x.type}:${key}`,old[0]?.decorVariant); const next=[{...x,key,received:Date.now(),decorVariant},...old.filter(v=>v.key!==key)].slice(0,current.maxVisible); return next }) }catch{} } }
  open(); return()=>{dead=true;window.clearTimeout(timer);socket?.close()}
 },[disabled])
 useEffect(()=>{setItems(items=>items.slice(0,settings.maxVisible))},[settings.maxVisible])
 return {settings,items,connected,setItems}
}
function giftTier(item:Item,s:Settings){const price=item.payload?.gift?.totalPrice||0;return price>=s.featuredValueThreshold?'featured':price>=s.highValueThreshold?'high':'normal'}
const eventRenderers:Record<string,(payload:any)=>string>={
 'live.enter':()=> '踏入了云台','live.superchat':p=>p.message,
 'live.guard.buy':p=>`开通 ${p.guardName||'舰长'}`,'live.like':()=> '点亮了一颗星','live.share':()=> '分享了直播间'
}
function DanmakuEmoticon({segment}:{segment:Extract<DanmakuSegment,{type:'emoticon'}>}) { const [failed,setFailed]=useState(false); if(failed)return <>{segment.text}</>; return <img className={`danmaku-emoticon${segment.standalone?' standalone':''}`} src={segment.url} width={segment.width||undefined} height={segment.height||undefined} alt={segment.text} title={segment.text} referrerPolicy="no-referrer" decoding="async" draggable={false} onError={()=>setFailed(true)}/> }
function DanmakuBody({payload}:{payload:any}) { const segments=Array.isArray(payload.segments)?payload.segments as DanmakuSegment[]:undefined; if(!segments?.length)return <>{payload.text||''}</>; return <>{segments.map((segment,index)=>segment.type==='emoticon'&&segment.url?<DanmakuEmoticon segment={segment} key={`${segment.unique||segment.url}:${index}`}/>:<span className="danmaku-text" key={`text:${index}`}>{segment.text}</span>)}</> }
function Card({item,settings,expanded}:{item:Item;settings:Settings;expanded:boolean}) { const p=item.payload||{}; const v=p.viewer||{}; const gift=p.gift; const isDanmaku=item.type==='live.danmaku'; const tier=gift?giftTier(item,settings):''; const body=gift?`献上 ${gift.name} ×${p.quantity||1}`:isDanmaku?<DanmakuBody payload={p}/>:eventRenderers[item.type]?.(p)||'送来了一份互动';
 return <article className={`card ${gift?'gift':''} ${item.type==='live.danmaku'?'danmaku':''} ${expanded?'expanded':'compact'} ${tier}`} key={item.key}>
   <CardDecor count={settings.particleCount} variant={item.decorVariant}/>
   {gift&&<div className="gift-art">{gift.animationUrl||gift.imageUrl?<img src={gift.animationUrl||gift.imageUrl} onError={e=>{const image=e.currentTarget;if(gift.imageUrl&&!image.src.endsWith(gift.imageUrl))image.src=gift.imageUrl;else image.style.display='none'}}/>:<span>✦</span>}</div>}
   <div className="copy"><b>{v.name||'直播间观众'}</b><span className={isDanmaku?'danmaku-content':undefined}>{body}</span>{gift?.priceCny>0&&<em>¥ {Number(gift.priceCny).toFixed(2)}</em>}</div>{tier==='featured'&&<div className="particles">✦ ✧ ✦</div>}
 </article> }
function Overlay({preview=false,previewSettings}:{preview?:boolean;previewSettings?:Settings}) { const root=useRef<HTMLDivElement>(null); const events=useEvents(preview); const {items,connected,setItems}=events; const settings=previewSettings||events.settings; const [shape,setShape]=useState('standard'); const [expandedKey,setExpandedKey]=useState<string>(); const fontFactor=settings.fontScale/100
 useEffect(()=>{if(!root.current)return;const ob=new ResizeObserver(([entry])=>{const {width,height}=entry.contentRect;setShape(width<380?'narrow':height<420?'short':'standard')});ob.observe(root.current);return()=>ob.disconnect()},[])
 useEffect(()=>{if(preview&&!items.length)setItems([{id:'text-preview',key:'text-preview',received:Date.now(),decorVariant:0,type:'live.danmaku',payload:{viewer:{name:'青玉观众'},text:'今天也要闪闪发光！'}},{id:'gift-preview',key:'gift-preview',received:Date.now()-1000,decorVariant:3,type:'live.gift',payload:{viewer:{name:'星光旅人'},quantity:1,gift:{name:'甜蜜告白',totalPrice:12000,priceCny:12,imageUrl:'',animationUrl:''}}}])},[preview,items.length,setItems])
 useEffect(()=>{const newest=items[0];if(!newest){setExpandedKey(undefined);return}setExpandedKey(newest.key);const densityFactor=shape==='short'?.6:1;const timer=window.setTimeout(()=>setExpandedKey(key=>key===newest.key?undefined:key),settings.collapseAfterSeconds*1000*densityFactor);return()=>window.clearTimeout(timer)},[items[0]?.key,items[0]?.received,settings.collapseAfterSeconds,shape])
 return <main ref={root} className={`overlay ${shape} ${settings.lowPerformanceMode?'low-motion':''}`} style={{['--motion' as string]:`${settings.motionIntensity/100}`,['--unfold-duration' as string]:`${settings.unfoldDurationMs||defaults.unfoldDurationMs}ms`,['--particle-duration' as string]:`${400000/Math.min(300,Math.max(25,settings.particleSpeed||defaults.particleSpeed))}ms`,['--font-title' as string]:`${18*fontFactor}px`,['--font-body' as string]:`${18*fontFactor}px`,['--font-expanded' as string]:`${26*fontFactor}px`,['--font-compact' as string]:`${15*fontFactor}px`}}><section className={`wall ${items.length?'awake':''}`}><header><i className={connected?'online':''}/><span>{settings.title}</span></header><div className="cards">{items.map(item=><Card item={item} settings={settings} expanded={item.key===expandedKey} key={item.key}/>)}</div></section></main> }
function api(url:string, init?:RequestInit){return fetch(url,{credentials:'same-origin',headers:{'content-type':'application/json',...(init?.headers||{})},...init})}
async function copyToClipboard(text:string){
 if(window.isSecureContext&&navigator.clipboard?.writeText){try{await navigator.clipboard.writeText(text);return true}catch{}}
 const input=document.createElement('textarea');input.value=text;input.readOnly=true;input.style.position='fixed';input.style.left='-9999px';input.style.opacity='0';document.body.appendChild(input);input.focus();input.select()
 let copied=false;try{copied=document.execCommand('copy')}finally{input.remove()}
 return copied
}
const previewPresets=[{label:'窄侧栏',width:360,height:600},{label:'竖屏',width:440,height:760},{label:'高清竖栏',width:600,height:1080},{label:'横向条',width:720,height:320}]
function Control(){
 const [password,setPassword]=useState(''); const [settings,setSettings]=useState<Settings>(); const [error,setError]=useState(''); const [message,setMessage]=useState(''); const [obsAddress,setObsAddress]=useState(''); const [previewSize,setPreviewSize]=useState(previewPresets[1])
 const load=useCallback(async()=>{const r=await api('/api/admin/overlay-settings');if(!r.ok)throw new Error(r.status===401?'请输入管理员密码':'无法读取设置');setSettings(await r.json())},[])
 useEffect(()=>{load().catch(()=>{})},[load])
 const login=async(e:React.FormEvent)=>{e.preventDefault();const r=await api('/api/auth/login',{method:'POST',body:JSON.stringify({password})});if(!r.ok){setError('密码不正确');return}setError('');await load()}
 const save=async()=>{if(!settings)return;const r=await api('/api/admin/overlay-settings',{method:'PUT',body:JSON.stringify(settings)});if(!r.ok)setError('保存失败');else setSettings((await r.json()).settings)}
 const copy=async()=>{setMessage('');const r=await api('/api/admin/obs-url');if(!r.ok){setError('无法获取 OBS 地址，请重新登录');return}const {path}=await r.json();const address=new URL(path,location.origin).toString();setObsAddress(address);if(await copyToClipboard(address)){setError('');setMessage('OBS 地址已复制到剪贴板')}else{setError('浏览器阻止了自动复制，请在下方地址框中手动复制')}}
 if(!settings)return <main className="control login"><h1>弹幕猪控制台</h1><form onSubmit={login}><input type="password" autoFocus placeholder="管理员密码" value={password} onChange={e=>setPassword(e.target.value)}/><button>进入</button>{error&&<p>{error}</p>}</form></main>
 const edit=(key:keyof Settings,value:any)=>setSettings({...settings,[key]:value})
 const labels={showDanmaku:'弹幕',showEnter:'进房',showGift:'礼物',showSuperchat:'醒目留言',showGuard:'舰长',showLike:'点赞',showShare:'分享',lowPerformanceMode:'低性能模式'}
 return <main className="control"><section><h1>青玉弹幕姬</h1><p>改动会立即同步到所有 OBS 浏览器源。</p><label>标题<input value={settings.title} onChange={e=>edit('title',e.target.value)}/></label><label>字号 <input type="range" min="50" max="300" step="5" value={settings.fontScale} onChange={e=>edit('fontScale',+e.target.value)}/><output>{settings.fontScale}%</output></label><label>最大可见条数 <input type="range" min="1" max="12" value={settings.maxVisible} onChange={e=>edit('maxVisible',+e.target.value)}/><output>{settings.maxVisible}</output></label><label>自动收缩秒数 <input type="range" min="2" max="60" value={settings.collapseAfterSeconds} onChange={e=>edit('collapseAfterSeconds',+e.target.value)}/><output>{settings.collapseAfterSeconds}s</output></label><label>卷轴展开时长 <input type="range" min="200" max="5000" step="100" value={settings.unfoldDurationMs} onChange={e=>edit('unfoldDurationMs',+e.target.value)}/><output>{(settings.unfoldDurationMs/1000).toFixed(1)}s</output></label><label>动效强度 <input type="range" min="0" max="100" value={settings.motionIntensity} onChange={e=>edit('motionIntensity',+e.target.value)}/><output>{settings.motionIntensity}%</output></label><label>每卡粒子数量 <input type="range" min="0" max="12" step="1" value={settings.particleCount} onChange={e=>edit('particleCount',+e.target.value)}/><output>{settings.particleCount}</output></label><label>粒子动画速度 <input type="range" min="25" max="300" step="25" value={settings.particleSpeed} onChange={e=>edit('particleSpeed',+e.target.value)}/><output>{settings.particleSpeed}%</output></label><fieldset>{(Object.keys(labels) as (keyof typeof labels)[]).map(k=><label key={k}><input type="checkbox" checked={settings[k]} onChange={e=>edit(k,e.target.checked)}/>{labels[k]}</label>)}</fieldset><label>高价值礼物（厘）<input type="number" value={settings.highValueThreshold} onChange={e=>edit('highValueThreshold',+e.target.value)}/></label><label>特别高价值（厘）<input type="number" value={settings.featuredValueThreshold} onChange={e=>edit('featuredValueThreshold',+e.target.value)}/></label><div className="buttons"><button type="button" onClick={save}>保存并同步</button><button type="button" className="secondary" onClick={copy}>复制 OBS 地址</button></div>{obsAddress&&<label className="obs-address">OBS 浏览器源地址<input readOnly value={obsAddress} onFocus={e=>e.currentTarget.select()}/></label>}{message&&<p className="success">{message}</p>}{error&&<p>{error}</p>}</section><section className="preview"><h2>自适应预览</h2><p>选择常用尺寸后仍可拖拽预览框右下角；OBS 中也可使用任意宽高。</p><div className="preset-buttons">{previewPresets.map(size=><button type="button" className={size.label===previewSize.label?'active':'secondary'} onClick={()=>setPreviewSize(size)} key={size.label}>{size.label}<small>{size.width}×{size.height}</small></button>)}</div><div className="preview-viewport"><div className="preview-frame" style={{width:previewSize.width,height:previewSize.height}}><Overlay preview previewSettings={settings}/></div></div></section></main>
}
const isControl=location.pathname.startsWith('/control');createRoot(document.getElementById('root')!).render(isControl?<Control/>:<Overlay/>);