import { CanvasChromeButton } from '@genarrative/image-canvas-react';
import { OverflowActions } from '@genarrative/shared/components';
import {
  Crop,
  Download,
  Grid2X2,
  ImageOff,
  Loader2,
  PersonStanding,
  Scissors,
  Sparkles,
  WandSparkles,
} from 'lucide-react';
import {
  Children,
  type CSSProperties,
  Fragment,
  isValidElement,
  type ReactNode,
} from 'react';

import { EditorIconButton } from './ImageCanvasEditorPrimitives';
import type { CanvasLayer } from './ImageCanvasEditorTypes';
import {
  canOpenRedrawPanel,
  isQuickEditSupportedLayer,
} from './ImageCanvasGenerationModel';

/** 选中工具条上的动作标识，供宿主声明自己实际可用的动作集合。 */
export type ImageCanvasSelectedToolbarAction =
  | 'quick-edit'
  | 'redraw'
  | 'crop-expand'
  | 'remove-background'
  | 'perfect-pixel'
  | 'split-icon-spritesheet'
  | 'extract-ui-design'
  | 'character-animation'
  | 'download';

type ImageCanvasSelectedLayerToolbarViewProps = {
  maxVisibleActions?: number;
  /**
   * 宿主显式声明的可用动作集合。
   *
   * 传 `null`（默认）时完全沿用美术画布内置判定；传入集合时以集合为准，
   * 让没有对应后端链路的画布宿主不必把「点了没反应」的按钮渲染出来。
   */
  supportedActions?: ReadonlySet<ImageCanvasSelectedToolbarAction> | null;
  /** 宿主在工具条上追加的常规动作，渲染在下载按钮之前。 */
  extraActions?: ReactNode;
  /** 工具栏末组动作，紧随下载按钮，与下载共用一个分组。 */
  endActions?: ReactNode;
  /** 提供文字时显示带文字的导出入口；缺省保持网页画布的图标按钮。 */
  downloadLabel?: string;
  selectedLayer: CanvasLayer | null;
  selectedToolbarStyle: CSSProperties | null;
  onOpenQuickEditPanel: (layer: CanvasLayer) => void;
  onOpenRedrawPanel: (layer: CanvasLayer) => void;
  onOpenCropExpandPanel: (layer: CanvasLayer) => void;
  onRemoveBackground: (layer: CanvasLayer) => void;
  onPerfectPixel: (layer: CanvasLayer) => void;
  isPerfectPixelProcessing: boolean;
  isPerfectPixelPendingConfirmation: boolean;
  isSplittingIconSpritesheet: boolean;
  isPersistingAssetKind: boolean;
  onSplitIconSpritesheet: (layer: CanvasLayer) => void;
  onExtractUiDesignAssets: (layer: CanvasLayer) => void;
  onOpenCharacterAnimationPanel: (layer: CanvasLayer) => void;
  onDownloadLayer: (layer: CanvasLayer) => void;
};

/** 条件动作通常放在 Fragment 中；空 Fragment 不能产生一个空分组。 */
function hasToolbarActions(actions: ReactNode): boolean {
  return Children.toArray(actions).some((action) =>
    isValidElement<{ children?: ReactNode }>(action) && action.type === Fragment
      ? hasToolbarActions(action.props.children)
      : action !== '',
  );
}

export function ImageCanvasSelectedLayerToolbarView({
  maxVisibleActions,
  supportedActions = null,
  extraActions,
  endActions,
  downloadLabel,
  selectedLayer,
  selectedToolbarStyle,
  onOpenQuickEditPanel,
  onOpenRedrawPanel,
  onOpenCropExpandPanel,
  onRemoveBackground,
  onPerfectPixel,
  isPerfectPixelProcessing,
  isPerfectPixelPendingConfirmation,
  isSplittingIconSpritesheet,
  isPersistingAssetKind,
  onSplitIconSpritesheet,
  onExtractUiDesignAssets,
  onOpenCharacterAnimationPanel,
  onDownloadLayer,
}: ImageCanvasSelectedLayerToolbarViewProps) {
  if (!selectedLayer || !selectedToolbarStyle) {
    return null;
  }
  const isActionSupported = (
    action: ImageCanvasSelectedToolbarAction,
    builtInAvailability: boolean,
  ) => (supportedActions ? supportedActions.has(action) : builtInAvailability);
  const canRedraw = isActionSupported(
    'redraw',
    canOpenRedrawPanel(selectedLayer),
  );
  const showDownload = isActionSupported('download', true);
  const downloadAction = showDownload ? (
    downloadLabel ? (
      <CanvasChromeButton
        className="image-canvas-editor__floating-toolbar-text-button"
        label={downloadLabel}
        title={downloadLabel}
        icon={<Download className="h-4 w-4" />}
        onClick={() => onDownloadLayer(selectedLayer)}
      >
        <span>{downloadLabel}</span>
      </CanvasChromeButton>
    ) : (
      <EditorIconButton
        label="下载按钮"
        title="下载按钮"
        icon={Download}
        onClick={() => onDownloadLayer(selectedLayer)}
      />
    )
  ) : null;
  const hasExtraActions = hasToolbarActions(extraActions);
  const hasEndActions = showDownload || hasToolbarActions(endActions);
  const divider = (
    <span
      aria-hidden="true"
      className="image-canvas-editor__floating-toolbar-divider"
    />
  );

  if (selectedLayer.mediaType === 'audio') {
    return (
      <div
        className="image-canvas-editor__floating-toolbar"
        style={selectedToolbarStyle}
        role="toolbar"
        aria-label="素材工具栏"
        onPointerDown={(event) => event.stopPropagation()}
      >
        <OverflowActions key={selectedLayer.id} maxVisible={maxVisibleActions}>
          {canRedraw ? (
            <CanvasChromeButton
              className="image-canvas-editor__floating-toolbar-text-button"
              label="改造"
              title="改造"
              icon={<WandSparkles className="h-4 w-4" />}
              onClick={() => onOpenRedrawPanel(selectedLayer)}
            >
              <span>改造</span>
            </CanvasChromeButton>
          ) : null}
          {canRedraw && hasExtraActions ? divider : null}
          {extraActions}
          {(canRedraw || hasExtraActions) && hasEndActions ? divider : null}
          {downloadAction}
          {endActions}
        </OverflowActions>
      </div>
    );
  }

  const canRasterEdit =
    selectedLayer.mediaType !== 'video' &&
    selectedLayer.mediaType !== 'image-sequence' &&
    selectedLayer.assetKind !== 'character-animation';
  const showQuickEdit = isActionSupported(
    'quick-edit',
    isQuickEditSupportedLayer(selectedLayer),
  );
  const showCharacterAnimation = isActionSupported(
    'character-animation',
    selectedLayer.assetKind === 'character',
  );
  const showCropExpand =
    canRasterEdit && isActionSupported('crop-expand', true);
  const showRemoveBackground =
    canRasterEdit && isActionSupported('remove-background', true);
  const showPerfectPixel =
    canRasterEdit && isActionSupported('perfect-pixel', true);
  const showSplitIconSpritesheet =
    selectedLayer.assetKind === 'icon-spritesheet' &&
    isActionSupported('split-icon-spritesheet', true);
  const showExtractUiDesign =
    selectedLayer.assetKind === 'ui-design' &&
    isActionSupported('extract-ui-design', true);
  const hasEditingActions =
    showCropExpand ||
    showRemoveBackground ||
    showPerfectPixel ||
    showSplitIconSpritesheet ||
    showExtractUiDesign ||
    showCharacterAnimation;

  return (
    <div
      className="image-canvas-editor__floating-toolbar"
      style={selectedToolbarStyle}
      role="toolbar"
      aria-label="图片工具栏"
      onPointerDown={(event) => event.stopPropagation()}
    >
      <OverflowActions key={selectedLayer.id} maxVisible={maxVisibleActions}>
        {showQuickEdit ? (
          <CanvasChromeButton
            className="image-canvas-editor__floating-toolbar-text-button"
            label="快速编辑"
            title="快速编辑"
            icon={<Sparkles className="h-4 w-4" />}
            onClick={() => onOpenQuickEditPanel(selectedLayer)}
          >
            <span>快速编辑</span>
          </CanvasChromeButton>
        ) : null}
        {showQuickEdit && hasEditingActions ? divider : null}
        {showCropExpand ? (
          <EditorIconButton
            label="裁扩按钮"
            title="裁扩按钮"
            icon={Crop}
            onClick={() => onOpenCropExpandPanel(selectedLayer)}
          />
        ) : null}
        {showRemoveBackground ? (
          <EditorIconButton
            label="去除背景按钮"
            title="去除背景按钮"
            icon={ImageOff}
            onClick={() => onRemoveBackground(selectedLayer)}
          />
        ) : null}
        {showPerfectPixel ? (
          <CanvasChromeButton
            className="image-canvas-editor__floating-toolbar-text-button"
            // 中文注释：保存态名称不能直接用「素材类型保存中」——icon-spritesheet 图层上
            // 拆分图集按钮同时显示该文案，两个控件会撞同一个无障碍名称。
            label={
              isPersistingAssetKind
                ? '完美像素等待素材类型保存'
                : isPerfectPixelProcessing
                  ? '完美像素处理中'
                  : isPerfectPixelPendingConfirmation
                    ? '完美像素结果待确认'
                    : '完美像素'
            }
            title={
              isPersistingAssetKind
                ? '完美像素等待素材类型保存'
                : isPerfectPixelProcessing
                  ? '完美像素处理中'
                  : isPerfectPixelPendingConfirmation
                    ? '结果待确认，双击原占位继续核对或重试'
                    : '自动识别并规整像素网格'
            }
            icon={
              isPersistingAssetKind || isPerfectPixelProcessing ? (
                <Loader2 className="h-4 w-4 animate-spin" />
              ) : (
                <Grid2X2 className="h-4 w-4" />
              )
            }
            // 中文注释：素材类型保存在途时必须一并禁用。请求同时带 assetKind 和
            // sourceResourceId，本地类型已改但资源尚未落库时两者不一致，后端
            // resolve_editor_pixel_art_snap_asset_kind 会直接 400，只留下失败占位。
            // 与相邻的拆分图集按钮保持同一套门禁。
            disabled={
              isPersistingAssetKind ||
              isPerfectPixelProcessing ||
              isPerfectPixelPendingConfirmation
            }
            aria-busy={isPersistingAssetKind || isPerfectPixelProcessing}
            onClick={() => onPerfectPixel(selectedLayer)}
          >
            <span>
              {isPersistingAssetKind
                ? '保存中'
                : isPerfectPixelProcessing
                  ? '处理中'
                  : isPerfectPixelPendingConfirmation
                    ? '待确认'
                    : '完美像素'}
            </span>
          </CanvasChromeButton>
        ) : null}
        {showSplitIconSpritesheet ? (
          <CanvasChromeButton
            className="image-canvas-editor__floating-toolbar-text-button"
            label={
              isPersistingAssetKind
                ? '素材类型保存中'
                : isSplittingIconSpritesheet
                  ? '拆图中'
                  : '拆分图集'
            }
            title={
              isPersistingAssetKind
                ? '素材类型保存中'
                : isSplittingIconSpritesheet
                  ? '拆图中'
                  : '拆分图集'
            }
            icon={
              isPersistingAssetKind || isSplittingIconSpritesheet ? (
                <Loader2 className="h-4 w-4 animate-spin" />
              ) : (
                <Scissors className="h-4 w-4" />
              )
            }
            disabled={isPersistingAssetKind || isSplittingIconSpritesheet}
            aria-busy={isPersistingAssetKind || isSplittingIconSpritesheet}
            onClick={() => onSplitIconSpritesheet(selectedLayer)}
          >
            <span>
              {isPersistingAssetKind
                ? '保存中'
                : isSplittingIconSpritesheet
                  ? '拆图中'
                  : '拆分图集'}
            </span>
          </CanvasChromeButton>
        ) : null}
        {showExtractUiDesign ? (
          <CanvasChromeButton
            className="image-canvas-editor__floating-toolbar-text-button"
            label="提取素材"
            title="提取素材"
            icon={<Scissors className="h-4 w-4" />}
            onClick={() => onExtractUiDesignAssets(selectedLayer)}
          >
            <span>提取素材</span>
          </CanvasChromeButton>
        ) : null}
        {showCharacterAnimation ? (
          <CanvasChromeButton
            className="image-canvas-editor__floating-toolbar-text-button"
            label="生成动画"
            title="生成动画"
            icon={<PersonStanding className="h-4 w-4" />}
            onClick={() => onOpenCharacterAnimationPanel(selectedLayer)}
          >
            <span>生成动画</span>
          </CanvasChromeButton>
        ) : null}
        {canRedraw ? (
          <>
            {showQuickEdit || hasEditingActions ? divider : null}
            <CanvasChromeButton
              className="image-canvas-editor__floating-toolbar-text-button"
              label="改造"
              title="改造"
              icon={<WandSparkles className="h-4 w-4" />}
              onClick={() => onOpenRedrawPanel(selectedLayer)}
            >
              <span>改造</span>
            </CanvasChromeButton>
          </>
        ) : null}
        {(showQuickEdit || hasEditingActions || canRedraw) && hasExtraActions
          ? divider
          : null}
        {extraActions}
        {(showQuickEdit || hasEditingActions || canRedraw || hasExtraActions) &&
        hasEndActions
          ? divider
          : null}
        {downloadAction}
        {endActions}
      </OverflowActions>
    </div>
  );
}