import {useEffect,useId,useMemo,useRef,useState,type ReactNode} from 'react';
import {Search} from 'lucide-react';
import {Dialog,EmptySearchState,Kbd} from '../../components/ui';
export interface WorkbenchCommand{id:string;label:string;group:string;icon?:ReactNode;shortcut?:string;disabled?:boolean;run:()=>void;}
export function CommandPalette({open,onClose,commands}:{open:boolean;onClose:()=>void;commands:WorkbenchCommand[]}){
  const [query,setQuery]=useState(''),[active,setActive]=useState(0),input=useRef<HTMLInputElement>(null),listId=useId();
  const filtered=useMemo(()=>{const needle=query.trim().toLocaleLowerCase();return commands.filter(command=>!needle||`${command.label} ${command.group}`.toLocaleLowerCase().includes(needle));},[commands,query]);
  const enabled=filtered.flatMap((command,index)=>command.disabled?[]:[index]),highlighted=filtered[active]&&!filtered[active].disabled?active:(enabled[0]??-1);
  useEffect(()=>{if(open)requestAnimationFrame(()=>input.current?.focus());},[open]);
  const close=()=>{setQuery('');setActive(0);onClose();},execute=(command?:WorkbenchCommand)=>{if(!command||command.disabled)return;command.run();close();};
  return <Dialog open={open} onClose={close} title="命令面板" className="max-w-xl"><div className="relative -m-4 mb-2 border-b border-border"><Search className="pointer-events-none absolute left-4 top-1/2 h-4 w-4 -translate-y-1/2 text-text-tertiary"/><input ref={input} role="combobox" aria-label="搜索命令" aria-autocomplete="list" aria-expanded="true" aria-controls={listId} aria-activedescendant={highlighted>=0?`${listId}-${filtered[highlighted].id}`:undefined} value={query} onChange={event=>{setQuery(event.target.value);setActive(0);}} onKeyDown={event=>{if(!enabled.length)return;const current=Math.max(0,enabled.indexOf(highlighted));if(event.key==='ArrowDown'){event.preventDefault();setActive(enabled[(current+1)%enabled.length]);}else if(event.key==='ArrowUp'){event.preventDefault();setActive(enabled[(current-1+enabled.length)%enabled.length]);}else if(event.key==='Enter'){event.preventDefault();execute(filtered[highlighted]);}}} placeholder="输入命令名称…" className="h-11 w-full bg-input pl-11 pr-4 text-sm text-text-primary placeholder:text-text-tertiary focus:outline-none"/></div><div id={listId} role="listbox" aria-label="可用命令" className="max-h-80 space-y-1 overflow-auto pt-1">{filtered.length?filtered.map((command,index)=><button key={command.id} id={`${listId}-${command.id}`} type="button" role="option" aria-selected={index===highlighted} disabled={command.disabled} onMouseEnter={()=>{if(!command.disabled)setActive(index);}} onClick={()=>execute(command)} className={`flex w-full items-center gap-3 rounded-md px-3 py-2 text-left text-xs outline-none ${index===highlighted?'bg-accent-soft text-accent':'text-text-secondary hover:bg-element-hover'} disabled:opacity-40`}><span className="flex h-5 w-5 items-center justify-center">{command.icon}</span><span className="min-w-0 flex-1"><span className="block truncate font-medium">{command.label}</span><span className="block text-[10px] text-text-tertiary">{command.group}</span></span>{command.shortcut&&<Kbd>{command.shortcut}</Kbd>}</button>):<EmptySearchState label="没有匹配的命令"/>}</div></Dialog>;
}