import { useEffect, useState } from 'react';
import { useReactFlow } from '@xyflow/react';
import { type BranchStyle } from '@/types/map';
import { Button } from '@/components/Button';
import { IconButton } from '@/components/IconButton';
import { Menu, MenuItem, MenuLabel, MenuSeparator } from '@/components/Menu';
import {
  ArrowLeftIcon,
  ChevronDownIcon,
  FitIcon,
  GridIcon,
  LayoutIcon,
  MoonIcon,
  PaletteIcon,
  PlusIcon,
  RedoIcon,
  SearchIcon,
  ShareIcon,
  SlidersIcon,
  SunIcon,
  TrashIcon,
  UndoIcon,
  ZoomInIcon,
  ZoomOutIcon,
} from '@/components/Icons';
import { ExportMenu } from '@/features/export/ExportMenu';
import {
  LAYOUT_OPTIONS,
  SPACING_LIMITS,
  SPACING_PRESETS,
  resolveSpacing,
} from '@/features/editor/layout';
import { THEMES } from '@/features/editor/themes';
import { selectCanRedo, selectCanUndo, useEditorStore } from '@/stores/editorStore';
import { useUiStore } from '@/stores/uiStore';
import { navigate } from '@/hooks/useRoute';

const BRANCH_STYLES: Array<{ id: BranchStyle; label: string }> = [
  { id: 'bezier', label: 'Bezier' },
  { id: 'curved', label: 'Courbe' },
  { id: 'straight', label: 'Droite' },
];

const SAVE_LABELS = {
  idle: '',
  dirty: 'Modifications non enregistrees',
  saving: 'Sauvegarde...',
  saved: 'Sauvegarde',
  error: 'Sauvegarde impossible',
} as const;

export interface EditorToolbarProps {
  onOpenShare: () => void;
  onToggleSearch: () => void;
}

export function EditorToolbar({ onOpenShare, onToggleSearch }: EditorToolbarProps) {
  const map = useEditorStore((state) => state.map);
  const saveStatus = useEditorStore((state) => state.saveStatus);
  const canUndo = useEditorStore(selectCanUndo);
  const canRedo = useEditorStore(selectCanRedo);
  const selectedIds = useEditorStore((state) => state.selectedNodeIds);
  const undo = useEditorStore((state) => state.undo);
  const redo = useEditorStore((state) => state.redo);
  const addChild = useEditorStore((state) => state.addChild);
  const deleteNodes = useEditorStore((state) => state.deleteNodes);
  const applyAutoLayout = useEditorStore((state) => state.applyAutoLayout);
  const updateSettings = useEditorStore((state) => state.updateSettings);
  const renameMap = useEditorStore((state) => state.renameMap);
  const requestFit = useEditorStore((state) => state.requestFit);

  const colorMode = useUiStore((state) => state.colorMode);
  const toggleColorMode = useUiStore((state) => state.toggleColorMode);
  const propertiesPanelOpen = useUiStore((state) => state.propertiesPanelOpen);
  const setPropertiesPanelOpen = useUiStore((state) => state.setPropertiesPanelOpen);

  const { zoomIn, zoomOut } = useReactFlow();
  const [name, setName] = useState(map?.name ?? '');
  const spacing = resolveSpacing(map?.settings.layoutSpacing);

  useEffect(() => setName(map?.name ?? ''), [map?.id, map?.name]);

  if (!map) return null;

  const commitName = () => {
    const trimmed = name.trim();
    if (!trimmed) {
      setName(map.name);
      return;
    }
    if (trimmed !== map.name) renameMap(trimmed);
  };

  return (
    <header
      className="no-print flex h-14 shrink-0 items-center gap-2 border-b border-zinc-200 bg-white px-3 dark:border-zinc-800 dark:bg-zinc-900"
      aria-label="Barre d'outils de l'editeur"
    >
      <IconButton
        label="Revenir au tableau de bord"
        icon={<ArrowLeftIcon />}
        onClick={() => navigate('/')}
      />

      <input
        value={name}
        onChange={(event) => setName(event.target.value)}
        onBlur={commitName}
        onKeyDown={(event) => {
          if (event.key === 'Enter') event.currentTarget.blur();
        }}
        aria-label="Nom de la carte"
        className="min-w-0 max-w-[16rem] flex-1 truncate rounded-md border border-transparent bg-transparent px-2 py-1 text-sm font-semibold text-zinc-900 hover:border-zinc-200 focus:border-indigo-400 dark:text-zinc-50 dark:hover:border-zinc-700"
      />

      <span
        className={`hidden shrink-0 text-xs sm:inline ${
          saveStatus === 'error' ? 'text-red-500' : 'text-zinc-400'
        }`}
        role="status"
        aria-live="polite"
      >
        {SAVE_LABELS[saveStatus]}
      </span>

      <div className="mx-1 hidden h-6 w-px bg-zinc-200 dark:bg-zinc-700 sm:block" />

      <IconButton label="Annuler (Ctrl+Z)" icon={<UndoIcon />} disabled={!canUndo} onClick={undo} />
      <IconButton label="Retablir (Ctrl+Y)" icon={<RedoIcon />} disabled={!canRedo} onClick={redo} />
      <IconButton
        label="Ajouter un noeud enfant (Tab)"
        icon={<PlusIcon />}
        onClick={() => addChild()}
      />
      <IconButton
        label="Supprimer la selection (Suppr)"
        icon={<TrashIcon />}
        tone="danger"
        disabled={selectedIds.length === 0}
        onClick={() => deleteNodes(selectedIds)}
      />

      <div className="mx-1 hidden h-6 w-px bg-zinc-200 dark:bg-zinc-700 sm:block" />

      <Menu
        label="Organisation automatique"
        trigger={
          <Button size="sm">
            <LayoutIcon className="h-4 w-4" />
            <span className="hidden md:inline">Organisation automatique</span>
            <ChevronDownIcon className="h-3.5 w-3.5 opacity-60" />
          </Button>
        }
      >
        {(close) => (
          <>
            <MenuLabel>Disposition</MenuLabel>
            {LAYOUT_OPTIONS.map((option) => (
              <MenuItem
                key={option.id}
                label={option.label}
                active={map.settings.layout === option.id}
                onSelect={() => {
                  applyAutoLayout(option.id);
                  close();
                }}
              />
            ))}
            <MenuSeparator />
            <MenuLabel>Espacement</MenuLabel>
            <div className="flex gap-1 px-2.5 pb-2">
              {SPACING_PRESETS.map((preset) => (
                <button
                  key={preset.id}
                  type="button"
                  onClick={() => updateSettings({ layoutSpacing: preset.spacing })}
                  aria-pressed={
                    spacing.parentGap === preset.spacing.parentGap &&
                    spacing.siblingGap === preset.spacing.siblingGap
                  }
                  className={`flex-1 rounded-md border px-2 py-1 text-xs font-medium transition-colors ${
                    spacing.parentGap === preset.spacing.parentGap &&
                    spacing.siblingGap === preset.spacing.siblingGap
                      ? 'border-indigo-400 bg-indigo-50 text-indigo-700 dark:bg-indigo-950/50 dark:text-indigo-300'
                      : 'border-zinc-200 text-zinc-600 hover:bg-zinc-50 dark:border-zinc-700 dark:text-zinc-300 dark:hover:bg-zinc-800'
                  }`}
                >
                  {preset.label}
                </button>
              ))}
            </div>

            <div className="space-y-2 px-2.5 pb-2">
              <label className="block text-[11px] text-zinc-500" htmlFor="spacing-parent">
                Distance parent / enfant : {spacing.parentGap} px
              </label>
              <input
                id="spacing-parent"
                type="range"
                min={SPACING_LIMITS.parentGap.min}
                max={SPACING_LIMITS.parentGap.max}
                step={5}
                value={spacing.parentGap}
                onChange={(event) =>
                  updateSettings({
                    layoutSpacing: { ...spacing, parentGap: Number(event.target.value) },
                  })
                }
                className="h-1.5 w-full accent-indigo-600"
              />

              <label className="block text-[11px] text-zinc-500" htmlFor="spacing-sibling">
                Espacement entre branches : {spacing.siblingGap} px
              </label>
              <input
                id="spacing-sibling"
                type="range"
                min={SPACING_LIMITS.siblingGap.min}
                max={SPACING_LIMITS.siblingGap.max}
                step={5}
                value={spacing.siblingGap}
                onChange={(event) =>
                  updateSettings({
                    layoutSpacing: { ...spacing, siblingGap: Number(event.target.value) },
                  })
                }
                className="h-1.5 w-full accent-indigo-600"
              />
              <p className="text-[11px] leading-snug text-zinc-400">
                Changer l&apos;espacement ne deplace rien : relancez l&apos;organisation.
              </p>
            </div>

            <MenuSeparator />
            <MenuItem
              label="Reorganiser avec la disposition actuelle"
              onSelect={() => {
                applyAutoLayout();
                close();
              }}
            />
          </>
        )}
      </Menu>

      <Menu
        label="Theme et style"
        trigger={
          <Button size="sm">
            <PaletteIcon className="h-4 w-4" />
            <span className="hidden lg:inline">Theme</span>
            <ChevronDownIcon className="h-3.5 w-3.5 opacity-60" />
          </Button>
        }
      >
        {() => (
          <>
            <MenuLabel>Theme de la carte</MenuLabel>
            <div className="max-h-56 overflow-y-auto">
              {THEMES.map((theme) => (
                <MenuItem
                  key={theme.id}
                  label={theme.name}
                  active={map.settings.theme === theme.id}
                  onSelect={() => updateSettings({ theme: theme.id })}
                />
              ))}
            </div>
            <MenuSeparator />
            <MenuLabel>Style des branches</MenuLabel>
            {BRANCH_STYLES.map((branch) => (
              <MenuItem
                key={branch.id}
                label={branch.label}
                active={map.settings.branchStyle === branch.id}
                onSelect={() => updateSettings({ branchStyle: branch.id })}
              />
            ))}
            <MenuSeparator />
            <MenuItem
              icon={<GridIcon className="h-4 w-4" />}
              label={map.settings.showGrid ? 'Masquer la grille' : 'Afficher la grille'}
              onSelect={() => updateSettings({ showGrid: !map.settings.showGrid })}
            />
            <MenuItem
              label="Aimanter sur la grille"
              active={map.settings.snapToGrid === true}
              hint={`${map.settings.snapGrid ?? 20} px`}
              onSelect={() => updateSettings({ snapToGrid: !map.settings.snapToGrid })}
            />
            <MenuItem
              label="Guides d'alignement"
              active={map.settings.alignmentGuides !== false}
              onSelect={() =>
                updateSettings({ alignmentGuides: map.settings.alignmentGuides === false })
              }
            />
          </>
        )}
      </Menu>

      <div className="ml-auto flex items-center gap-1">
        <IconButton label="Zoom avant" icon={<ZoomInIcon />} onClick={() => zoomIn()} />
        <IconButton label="Zoom arriere" icon={<ZoomOutIcon />} onClick={() => zoomOut()} />
        <IconButton label="Adapter a l'ecran (F)" icon={<FitIcon />} onClick={requestFit} />
        <IconButton
          label="Rechercher dans la carte (Ctrl+F)"
          icon={<SearchIcon />}
          onClick={onToggleSearch}
        />
        <IconButton
          label={propertiesPanelOpen ? 'Masquer les proprietes' : 'Afficher les proprietes'}
          icon={<SlidersIcon />}
          active={propertiesPanelOpen}
          onClick={() => setPropertiesPanelOpen(!propertiesPanelOpen)}
        />
        <IconButton
          label={colorMode === 'dark' ? 'Passer en mode clair' : 'Passer en mode sombre'}
          icon={colorMode === 'dark' ? <SunIcon /> : <MoonIcon />}
          onClick={toggleColorMode}
        />

        <div className="mx-1 h-6 w-px bg-zinc-200 dark:bg-zinc-700" />

        <Button size="sm" onClick={onOpenShare}>
          <ShareIcon className="h-4 w-4" />
          <span className="hidden md:inline">Partager</span>
        </Button>
        <ExportMenu />
      </div>
    </header>
  );
}