import {useRef,type PointerEvent} from 'react';
import {Type,ImagePlus,FileText,Plus,Bold,Italic,Maximize,MoreHorizontal} from 'lucide-react';
import type {CanvasNode,TextStyle} from '../../lib/canvas-document';
import s from '../../styles/canvas-node.module.css';
type Props={node:CanvasNode;selected:boolean;editing:boolean;hand:boolean;onSelect:()=>void;onChooseReference:()=>void;onEdit:()=>void;onDrag:(e:PointerEvent<HTMLElement>)=>void;onResize:(e:PointerEvent<HTMLElement>)=>void;onChange:(text:string)=>void;onRename:(title:string)=>void;onStyle:(style:TextStyle)=>void;onReference:(e:PointerEvent<HTMLButtonElement>|React.MouseEvent<HTMLButtonElement>)=>void;onMenu:(e:React.MouseEvent<HTMLButtonElement>)=>void;onUpload:()=>void;onUpscale:()=>void;onExpand:()=>void;onBeginEdit:()=>void};
export default function CanvasNodeView(p:Props){
 const {node:n}=p;const gesture=useRef<{selected:boolean;x:number;y:number;moved:boolean}|null>(null);
 const icon=n.kind==='image'?<ImagePlus size={15}/>:n.kind==='script'?<FileText size={15}/>:<Type size={15}/>;
 const style={fontWeight:n.style?.bold?700:400,fontStyle:n.style?.italic?'italic':'normal',fontSize:n.style?.size||15,color:n.style?.color};
 return <article data-node-id={n.id} data-editing={p.editing} data-selected={p.selected} className={s.node} style={{left:n.x,top:n.y,width:n.width||320,height:n.height||350}} onPointerDown={e=>{gesture.current=null;if(p.hand||(p.editing&&n.kind==='text')||e.button!==0||(e.target as HTMLElement).closest('button,input,select'))return;gesture.current={selected:p.selected,x:e.clientX,y:e.clientY,moved:false};e.stopPropagation();p.onSelect();p.onDrag(e)}} onPointerMove={e=>{const g=gesture.current;if(g&&Math.hypot(e.clientX-g.x,e.clientY-g.y)>=4)g.moved=true}} onClick={e=>{if((e.target as HTMLElement).closest('button,input,select'))return;const g=gesture.current;if(!p.hand&&!p.editing&&g?.selected&&!g.moved)p.onEdit();gesture.current=null}} onKeyDown={e=>{if(e.target!==e.currentTarget)return;if(e.key==='Enter'){e.preventDefault();p.onEdit()}}} tabIndex={0} aria-label={n.title}>
 <header className={s.title}>{icon}<input aria-label="节点名称" value={n.title} maxLength={200} onFocus={p.onBeginEdit} onChange={e=>p.onRename(e.target.value)} onPointerDown={e=>e.stopPropagation()}/>{p.selected&&<button aria-label={`${n.title} 操作`} onClick={e=>{e.stopPropagation();p.onMenu(e)}}><MoreHorizontal size={17}/></button>}</header>
 {p.editing&&n.kind==='text'&&<div className={s.format} onPointerDown={e=>e.stopPropagation()}><input aria-label="文字颜色" type="color" value={n.style?.color||'#dddddd'} onChange={e=>p.onStyle({...n.style,color:e.target.value})}/><select aria-label="文字样式" value={n.style?.size||15} onChange={e=>p.onStyle({...n.style,size:Number(e.target.value)})}><option value={15}>正文</option><option value={24}>小标题</option><option value={32}>标题</option></select><button aria-label="加粗" aria-pressed={!!n.style?.bold} onClick={()=>p.onStyle({...n.style,bold:!n.style?.bold})}><Bold size={17}/></button><button aria-label="斜体" aria-pressed={!!n.style?.italic} onClick={()=>p.onStyle({...n.style,italic:!n.style?.italic})}><Italic size={17}/></button><button aria-label="展开文本节点" onClick={p.onExpand}><Maximize size={17}/></button></div>}
 {n.kind==='image'?<div data-node-content className={s.image}>{n.image?<img src={n.image} alt={n.title} draggable={false}/>:<div className={s.empty}><ImagePlus size={48} strokeWidth={1}/><button onClick={e=>{e.stopPropagation();p.onUpload()}}>上传图片</button></div>}{p.selected&&n.image&&<button className={s.upscale} onClick={e=>{e.stopPropagation();p.onUpscale()}}>图片高清 ↗</button>}</div>:p.editing&&n.kind==='text'?<textarea data-node-content autoFocus aria-label={`${n.title} 内容`} style={style} value={n.text} maxLength={10000} placeholder="输入内容…" onFocus={p.onBeginEdit} onChange={e=>p.onChange(e.target.value)}/>:<div data-node-content className={s.content} style={style}>{n.text?<p>{n.text}</p>:<div className={s.empty}>{icon}<button onClick={e=>{e.stopPropagation();p.onEdit()}}>{n.kind==='text'?'自己编写内容':n.kind==='script'?'编写脚本':'填写创作要求'}</button></div>}</div>}
 {p.selected&&<><button className={`${s.reference} ${s.incoming}`} aria-label={`为 ${n.title} 添加参考`} onClick={e=>{e.stopPropagation();p.onChooseReference()}}><Plus size={18}/></button><button className={s.reference} aria-label={`引用 ${n.title} 生成`} onClick={e=>{e.stopPropagation();p.onReference(e)}}><Plus size={18}/></button><button className={s.resize} aria-label={`调整 ${n.title} 尺寸`} onPointerDown={e=>{e.stopPropagation();gesture.current=null;p.onResize(e)}} onClick={e=>e.stopPropagation()}>↘</button></>}
 </article>;
}