import { Pin, Paintbrush2, Droplet, Settings, Save, Upload, Minus, Square, X, MousePointer2, Globe, FolderOpen, ChevronDown, ImageDown, LogOut, FilePlus, GripVertical, FileArchive } from 'lucide-react';
import { useAppStore } from '../store';
import { useRef, useState } from 'react';
import { invoke } from '@tauri-apps/api/core';
import { getCurrentWindow } from '@tauri-apps/api/window';

const appWindow = getCurrentWindow();

function showToast(msg: string) { window.dispatchEvent(new CustomEvent('muse:toast', { detail: msg })); }

export const Toolbar = () => {
  const { images, textNotes, annotations, palettes, zoom, setZoom, pan, setPan, globalDesaturate, setGlobalDesaturate, isAlwaysOnTop, setIsAlwaysOnTop, bgOpacity, setBgOpacity, isClickThrough, setIsClickThrough, isAnnotationMode, setIsAnnotationMode, isSettingsOpen, setIsSettingsOpen, setTextNotes, setImages, setAnnotations, setPalettes, isBrowserOpen, setIsBrowserOpen, isLibraryOpen, setIsLibraryOpen, currentScreen, setCurrentScreen, activeProjectId, setActiveProjectId, boardTitle, setBoardTitle } = useAppStore();
  const [isBoardMenuOpen, setIsBoardMenuOpen] = useState(false);
  const fileInputRef = useRef<HTMLInputElement>(null);

  const handleExportFile = () => {
    const filename = `${(boardTitle || 'board').replace(/[^a-zA-Z0-9 ]/g, '').trim().replace(/\s+/g, '-').toLowerCase() || 'board'}.json`;
    const state = JSON.stringify({ textNotes, images, annotations, palettes, zoom, pan, title: boardTitle }, null, 2);
    const blob = new Blob([state], { type: 'application/json' });
    const url = URL.createObjectURL(blob);
    const a = document.createElement('a'); a.href = url; a.download = filename;
    document.body.appendChild(a); a.click(); document.body.removeChild(a); URL.revokeObjectURL(url);
    showToast(`✓ Exported "${filename}"`);
  };

  const handleExportRefs = async () => {
    const filename = `${(boardTitle || 'board').replace(/[^a-zA-Z0-9 ]/g, '').trim().replace(/\s+/g, '-').toLowerCase() || 'board'}.refs`;
    const state = JSON.stringify({ textNotes, images, annotations, palettes, zoom, pan, title: boardTitle });
    try {
      const bytes = await invoke<number[]>('refs_export', { stateJson: state });
      const blob = new Blob([new Uint8Array(bytes)], { type: 'application/octet-stream' });
      const url = URL.createObjectURL(blob);
      const a = document.createElement('a'); a.href = url; a.download = filename;
      document.body.appendChild(a); a.click(); document.body.removeChild(a); URL.revokeObjectURL(url);
      showToast(`✓ Exported "${filename}" — portable archive with all images`);
    } catch (e) {
      showToast(`✗ Export failed: ${e}`);
      console.error('Export .refs failed:', e);
    }
  };

  const handleQuickSave = () => { if (!activeProjectId) return; invoke('project_save', { id: activeProjectId, state: JSON.stringify({ textNotes, images, annotations, palettes, zoom, pan, title: boardTitle }), title: boardTitle }).then(() => showToast('✓ Saved')).catch(() => showToast('✗ Save failed')); };
  const handleLoad = (e: React.ChangeEvent<HTMLInputElement>) => { const file = e.target.files?.[0]; if (!file) return; const reader = new FileReader(); reader.onload = (ev) => { try { const d = JSON.parse(ev.target?.result as string); if (d.images) setImages(d.images); if (d.textNotes) setTextNotes(d.textNotes); if (d.annotations) setAnnotations(d.annotations); if (d.palettes) setPalettes(d.palettes); if (d.zoom) setZoom(d.zoom); if (d.pan) setPan(d.pan); if (d.title) setBoardTitle(d.title); showToast(`✓ Loaded "${file.name}"`); } catch { showToast('✗ Failed to parse file'); } }; reader.readAsText(file); e.target.value = ''; };
  const handleCloseProject = () => { setIsBoardMenuOpen(false); handleQuickSave(); setCurrentScreen('hub'); };
  const handleNewBoard = async () => { setIsBoardMenuOpen(false); handleQuickSave(); try { const entry = await invoke<any>('project_create', { title: null }); setActiveProjectId(entry.id); setBoardTitle(entry.title); } catch {} setImages([]); setTextNotes([]); setAnnotations([]); setPalettes([]); setZoom(1); setPan({ x: 0, y: 0 }); };
  const handleRename = (newTitle: string) => { const title = newTitle.trim() || 'Untitled Board'; setBoardTitle(title); if (activeProjectId) invoke('project_rename', { id: activeProjectId, title }).catch(() => {}); };

  return <div className={`absolute top-0 w-full h-16 pointer-events-none group/toolbar ${isBrowserOpen || isSettingsOpen ? 'z-20' : 'z-50'}`}>
    <div className="absolute top-4 left-1/2 -translate-x-1/2 bg-[var(--panel-bg)]/95 backdrop-blur-md border border-[var(--panel-border)] shadow-2xl flex items-center h-[38px] rounded-lg pointer-events-auto transition-all duration-300 opacity-0 -translate-y-4 group-hover/toolbar:opacity-100 group-hover/toolbar:translate-y-0 focus-within:opacity-100 focus-within:translate-y-0 text-[var(--ui-secondary)] select-none">
      <div className="flex items-center pl-2 pr-1 h-full cursor-grab active:cursor-grabbing text-white/20 hover:text-white/40 transition-colors" data-tauri-drag-region><GripVertical size={12} className="pointer-events-none" /></div>
      <div className="flex items-center pr-2 border-r border-[var(--panel-border)] h-full relative">
        <div className="text-[var(--ui-primary)] text-[13px] font-medium outline-none min-w-[30px] max-w-[160px] truncate" contentEditable suppressContentEditableWarning onBlur={(e) => handleRename(e.currentTarget.textContent || '')} onKeyDown={(e) => { if (e.key === 'Enter') { e.preventDefault(); (e.target as HTMLElement).blur(); } }}>{boardTitle}</div>
        <button className="ml-1 text-[var(--ui-secondary)] hover:text-[var(--ui-primary)] rounded hover:bg-white/5 p-0.5" onClick={() => setIsBoardMenuOpen(!isBoardMenuOpen)}><ChevronDown size={14} /></button>
        {isBoardMenuOpen && <><div className="fixed inset-0 z-40" onClick={() => setIsBoardMenuOpen(false)} /><div className="absolute top-full left-0 mt-2 w-56 bg-[var(--panel-bg)] border border-[var(--panel-border)] rounded-lg shadow-2xl z-50 py-1.5 pointer-events-auto">
          <button onClick={handleNewBoard} className="w-full text-left px-3 py-2 text-[12px] text-[#C0C0C0] hover:bg-[var(--accent)] hover:text-white flex items-center gap-2.5"><FilePlus size={14} /> New Board</button>
          <button onClick={() => { setIsBoardMenuOpen(false); fileInputRef.current?.click(); }} className="w-full text-left px-3 py-2 text-[12px] text-[#C0C0C0] hover:bg-[var(--accent)] hover:text-white flex items-center gap-2.5"><FolderOpen size={14} /> Open File</button>
          <div className="h-px bg-[var(--panel-border)] my-1.5 mx-2" />
          <button onClick={() => { setIsBoardMenuOpen(false); handleExportFile(); }} className="w-full text-left px-3 py-2 text-[12px] text-[#C0C0C0] hover:bg-[var(--accent)] hover:text-white flex items-center gap-2.5"><ImageDown size={14} /> Export as JSON</button>
          <button onClick={() => { setIsBoardMenuOpen(false); handleExportRefs(); }} className="w-full text-left px-3 py-2 text-[12px] text-[#C0C0C0] hover:bg-[var(--accent)] hover:text-white flex items-center gap-2.5"><FileArchive size={14} /> Export as .refs</button>
          <div className="h-px bg-[var(--panel-border)] my-1.5 mx-2" />
          <button onClick={handleCloseProject} className="w-full text-left px-3 py-2 text-[12px] text-[#FF453A] hover:bg-[#FF453A] hover:text-white flex items-center gap-2.5"><LogOut size={14} /> Close Project</button>
        </div></>}
      </div>
      <div className="flex items-center px-1 h-full gap-1"><button className="w-8 h-8 flex items-center justify-center text-[var(--ui-secondary)] hover:text-[var(--ui-primary)] hover:bg-white/5 rounded-md" onClick={handleQuickSave} title="Save (Ctrl+S)"><Save size={14} /></button><button className="w-8 h-8 flex items-center justify-center text-[var(--ui-secondary)] hover:text-[var(--ui-primary)] hover:bg-white/5 rounded-md" onClick={() => fileInputRef.current?.click()} title="Open File"><Upload size={14} /></button><input type="file" accept=".json,.refs" className="hidden" ref={fileInputRef} onChange={handleLoad} /></div>
      <div className="w-px h-[22px] bg-[var(--panel-border)]" />
      <div className="flex items-center px-2 h-full"><div className="text-[var(--ui-secondary)] text-[11px] w-10 text-center font-medium">{Math.round(zoom * 100)}%</div></div>
      <div className="w-px h-[22px] bg-[var(--panel-border)]" />
      <div className="flex items-center px-1 h-full gap-1"><button className={`w-8 h-8 flex items-center justify-center rounded-md transition-colors ${isBrowserOpen ? 'text-[var(--accent)] bg-[var(--accent)]/10' : 'text-[var(--ui-secondary)] hover:text-[var(--ui-primary)] hover:bg-white/5'}`} onClick={() => setIsBrowserOpen(!isBrowserOpen)} title="Browser (B)"><Globe size={14} /></button><button className={`w-8 h-8 flex items-center justify-center rounded-md transition-colors ${isLibraryOpen ? 'text-[var(--accent)] bg-[var(--accent)]/10' : 'text-[var(--ui-secondary)] hover:text-[var(--ui-primary)] hover:bg-white/5'}`} onClick={() => setIsLibraryOpen(!isLibraryOpen)} title="Library (L)"><FolderOpen size={14} /></button></div>
      <div className="w-px h-[22px] bg-[var(--panel-border)]" />
      <div className="flex items-center px-1 h-full gap-1"><button className={`w-8 h-8 flex items-center justify-center rounded-md ${isAlwaysOnTop ? 'text-[var(--ui-primary)] bg-white/10' : 'text-[var(--ui-secondary)] hover:text-[var(--ui-primary)] hover:bg-white/5'}`} onClick={() => setIsAlwaysOnTop(!isAlwaysOnTop)} title="Always on Top (T)"><Pin size={14} className={isAlwaysOnTop ? '' : '-rotate-45'} /></button>{isAlwaysOnTop && <><button className={`w-8 h-8 flex items-center justify-center rounded-md ${isClickThrough ? 'text-[var(--accent)] bg-[var(--accent)]/10' : 'text-[var(--ui-secondary)] hover:text-[var(--ui-primary)] hover:bg-white/5'}`} onClick={() => setIsClickThrough(!isClickThrough)}><MousePointer2 size={14} /></button><div className="flex items-center gap-2 pl-2"><span className="text-[10px] text-[var(--ui-secondary)] w-6">{bgOpacity}%</span><input type="range" min="10" max="100" value={bgOpacity} onChange={e => setBgOpacity(Number(e.target.value))} className="w-16 accent-[var(--accent)]" /></div></>}</div>
      <div className="w-px h-[22px] bg-[var(--panel-border)]" />
      <div className="flex items-center px-1 h-full gap-1"><button className={`w-8 h-8 flex items-center justify-center rounded-md ${isAnnotationMode ? 'text-[#32D74B] bg-[#32D74B]/10' : 'text-[var(--ui-secondary)] hover:text-[var(--ui-primary)] hover:bg-white/5'}`} onClick={() => setIsAnnotationMode(!isAnnotationMode)} title="Annotate (A)"><Paintbrush2 size={14} /></button><button className={`w-8 h-8 flex items-center justify-center rounded-md ${globalDesaturate ? 'text-[#FFD60A] bg-[#FFD60A]/10' : 'text-[var(--ui-secondary)] hover:text-[var(--ui-primary)] hover:bg-white/5'}`} onClick={() => setGlobalDesaturate(!globalDesaturate)} title="Grayscale (D)"><Droplet size={14} /></button></div>
      <div className="w-px h-[22px] bg-[var(--panel-border)]" />
      <div className="flex items-center px-1 h-full"><button className="w-8 h-8 flex items-center justify-center text-[var(--ui-secondary)] hover:text-[var(--ui-primary)] hover:bg-white/5 rounded-md" onClick={() => setIsSettingsOpen(!isSettingsOpen)} title="Settings (Ctrl+,)"><Settings size={14} /></button></div>
      <div className="flex items-center gap-1 pl-2 pr-2 h-full border-l border-[var(--panel-border)]"><button className="w-8 h-8 flex items-center justify-center text-[var(--ui-secondary)] hover:text-[var(--ui-primary)] hover:bg-white/5 rounded-md" onClick={() => appWindow.minimize()}><Minus size={15} /></button><button className="w-8 h-8 flex items-center justify-center text-[var(--ui-secondary)] hover:text-[var(--ui-primary)] hover:bg-white/5 rounded-md" onClick={() => appWindow.toggleMaximize()}><Square size={12} /></button><button className="w-8 h-8 flex items-center justify-center text-[var(--ui-secondary)] hover:text-[#FF453A] hover:bg-[#FF453A]/10 rounded-md" onClick={() => appWindow.close()}><X size={16} /></button></div>
    </div>
  </div>;
};