import {
  useCallback,
  useEffect,
  useLayoutEffect,
  useRef,
  useState,
} from 'react';

import {
  PlatformFloatingMenu,
  PlatformFloatingMenuItem,
} from '../common/PlatformFloatingMenu';
import { clamp, CONTEXT_MENU_VIEWPORT_MARGIN } from './ImageCanvasEditorModel';
import type {
  CanvasClipboard,
  CanvasContextMenuState,
  CanvasLayer,
  CanvasViewport,
  ImageContextMenuState,
} from './ImageCanvasEditorTypes';
import { isQuickEditSupportedLayer } from './ImageCanvasGenerationModel';
import type { CanvasLayerCopyBlockReason } from './ImageCanvasLayerCommandModel';

type ImageCanvasContextMenusViewProps = {
  viewport: CanvasViewport;
  contextMenu: CanvasContextMenuState | null;
  canvasClipboard: CanvasClipboard | null;
  imageContextMenu: ImageContextMenuState | null;
  imageContextMenuLayer: CanvasLayer | null;
  contextMenuLayer: CanvasLayer | null;
  contextShouldShowLayer: boolean;
  contextShouldUnlockLayer: boolean;
  canCopyContextLayers: boolean;
  contextLayerCopyBlockReason?: CanvasLayerCopyBlockReason | null;
  isCanvasClipboardCopyBlocked: boolean;
  onPasteCanvasClipboard: (canvasPoint?: { x: number; y: number }) => void;
  onCopyContextLayers: (options?: { cut?: boolean }) => void;
  onDuplicateContextLayers: () => void;
  onMoveContextLayers: (mode: 'up' | 'down' | 'top' | 'bottom') => void;
  onGroupContextLayers: () => void;
  onUngroupContextLayers: () => void;
  onToggleContextLayerVisibility: () => void;
  onToggleContextLayerLock: () => void;
  onFlipContextLayers: (axis: 'x' | 'y') => void;
  onExportContextLayer: (options?: {
    mode?: 'spine-json' | 'sequence-with-preview';
  }) => void;
  onDeleteContextLayers: () => void;
  onDeleteLayerById: (layerId: string | null) => void;
  onCloseContextMenu: () => void;
  onCloseImageContextMenu: () => void;
  onUpdateScaleFromCenter: (nextScale: number) => void;
  onFitLayers: () => void;
  onOpenQuickEditPanel: (layer: CanvasLayer) => void;
  onOpenLayerMetadata: (layer: CanvasLayer) => void;
  onOpenCharacterAnimationPanel: (layer: CanvasLayer) => void;
};

type MeasuredMenuLayout = {
  key: string;
  x: number;
  y: number;
  submenuDirection: 'left' | 'right';
  submenuVerticalDirection: 'down' | 'up';
};

export function ImageCanvasContextMenusView({
  viewport,
  contextMenu,
  canvasClipboard: _canvasClipboard,
  imageContextMenu,
  imageContextMenuLayer,
  contextMenuLayer,
  contextShouldShowLayer,
  contextShouldUnlockLayer,
  canCopyContextLayers,
  contextLayerCopyBlockReason = null,
  isCanvasClipboardCopyBlocked,
  onPasteCanvasClipboard,
  onCopyContextLayers,
  onDuplicateContextLayers,
  onMoveContextLayers,
  onGroupContextLayers,
  onUngroupContextLayers,
  onToggleContextLayerVisibility,
  onToggleContextLayerLock,
  onFlipContextLayers,
  onExportContextLayer,
  onDeleteContextLayers,
  onDeleteLayerById,
  onCloseContextMenu,
  onCloseImageContextMenu,
  onUpdateScaleFromCenter,
  onFitLayers,
  onOpenQuickEditPanel,
  onOpenLayerMetadata,
  onOpenCharacterAnimationPanel,
}: ImageCanvasContextMenusViewProps) {
  const isImageSequenceLayer = contextMenuLayer?.mediaType === 'image-sequence';
  const layerCopyBlockedTitle =
    contextLayerCopyBlockReason === 'self-contained-local-unsupported'
      ? '历史序列帧素材暂不支持复制'
      : contextLayerCopyBlockReason === 'pending-resource'
        ? '素材仍在保存，请稍后重试'
        : contextLayerCopyBlockReason === 'unresolved-resource'
          ? '素材资源尚未登记，暂不能复制'
          : undefined;
  const menuRef = useRef<HTMLDivElement | null>(null);
  const [measuredMenuLayout, setMeasuredMenuLayout] =
    useState<MeasuredMenuLayout | null>(null);
  const closeMenus = useCallback(() => {
    onCloseContextMenu();
    onCloseImageContextMenu();
  }, [onCloseContextMenu, onCloseImageContextMenu]);
  const activeMenuLayoutKey = contextMenu
    ? [
        'context',
        contextMenu.kind,
        contextMenu.kind === 'layer'
          ? contextMenu.layerId
          : contextMenu.kind === 'generation-dialog'
            ? contextMenu.dialogId
            : 'blank',
        contextMenu.x,
        contextMenu.y,
        isImageSequenceLayer ? 'sequence' : 'single',
        imageContextMenuLayer ? 'image-actions' : 'layer-actions',
        imageContextMenuLayer?.assetKind ?? 'asset',
      ].join(':')
    : imageContextMenu
      ? [
          'image',
          imageContextMenu.layerId,
          imageContextMenu.x,
          imageContextMenu.y,
          imageContextMenuLayer?.assetKind ?? 'asset',
        ].join(':')
      : null;
  const activeMenuX = contextMenu?.x ?? imageContextMenu?.x ?? null;
  const activeMenuY = contextMenu?.y ?? imageContextMenu?.y ?? null;
  const currentMeasuredMenuLayout =
    measuredMenuLayout?.key === activeMenuLayoutKey ? measuredMenuLayout : null;
  const contextMenuClassName = [
    'image-canvas-editor__context-menu',
    currentMeasuredMenuLayout?.submenuDirection === 'left'
      ? 'image-canvas-editor__context-menu--submenu-left'
      : null,
    currentMeasuredMenuLayout?.submenuVerticalDirection === 'up'
      ? 'image-canvas-editor__context-menu--submenu-up'
      : null,
  ]
    .filter(Boolean)
    .join(' ');

  useLayoutEffect(() => {
    const menuElement = menuRef.current;
    if (
      typeof window === 'undefined' ||
      !activeMenuLayoutKey ||
      activeMenuX === null ||
      activeMenuY === null ||
      !menuElement
    ) {
      setMeasuredMenuLayout(null);
      return;
    }
    const menuRect = menuElement.getBoundingClientRect();
    const menuWidth = menuRect.width || menuElement.offsetWidth;
    const menuHeight = menuRect.height || menuElement.offsetHeight;
    const x = clamp(
      activeMenuX,
      CONTEXT_MENU_VIEWPORT_MARGIN,
      Math.max(
        CONTEXT_MENU_VIEWPORT_MARGIN,
        window.innerWidth - menuWidth - CONTEXT_MENU_VIEWPORT_MARGIN,
      ),
    );
    const y = clamp(
      activeMenuY,
      CONTEXT_MENU_VIEWPORT_MARGIN,
      Math.max(
        CONTEXT_MENU_VIEWPORT_MARGIN,
        window.innerHeight - menuHeight - CONTEXT_MENU_VIEWPORT_MARGIN,
      ),
    );
    const submenuElement = menuElement.querySelector<HTMLElement>(
      '.image-canvas-editor__context-submenu-panel',
    );
    const submenuRect = submenuElement?.getBoundingClientRect();
    const submenuWidth = submenuRect?.width || submenuElement?.offsetWidth || 0;
    const submenuHeight =
      submenuRect?.height || submenuElement?.offsetHeight || 0;
    const submenuGap = 8;
    const submenuVerticalOffset = 6;
    const submenuDirection =
      submenuWidth > 0 &&
      x + menuWidth + submenuGap + submenuWidth >
        window.innerWidth - CONTEXT_MENU_VIEWPORT_MARGIN &&
      x - submenuGap - submenuWidth >= CONTEXT_MENU_VIEWPORT_MARGIN
        ? 'left'
        : 'right';
    const submenuAnchorRect =
      submenuElement?.parentElement?.getBoundingClientRect();
    const submenuAnchorOffsetTop =
      submenuAnchorRect && submenuElement
        ? submenuAnchorRect.top - menuRect.top
        : 0;
    const submenuAnchorHeight =
      submenuAnchorRect?.height ||
      submenuElement?.parentElement?.offsetHeight ||
      0;
    const submenuDefaultBottom =
      y + submenuAnchorOffsetTop - submenuVerticalOffset + submenuHeight;
    const submenuFlippedTop =
      y +
      submenuAnchorOffsetTop +
      submenuAnchorHeight +
      submenuVerticalOffset -
      submenuHeight;
    const submenuVerticalDirection =
      submenuHeight > 0 &&
      submenuDefaultBottom >
        window.innerHeight - CONTEXT_MENU_VIEWPORT_MARGIN &&
      submenuFlippedTop >= CONTEXT_MENU_VIEWPORT_MARGIN
        ? 'up'
        : 'down';
    setMeasuredMenuLayout((previous) => {
      if (
        previous?.key === activeMenuLayoutKey &&
        previous.x === x &&
        previous.y === y &&
        previous.submenuDirection === submenuDirection &&
        previous.submenuVerticalDirection === submenuVerticalDirection
      ) {
        return previous;
      }
      return {
        key: activeMenuLayoutKey,
        x,
        y,
        submenuDirection,
        submenuVerticalDirection,
      };
    });
  }, [activeMenuLayoutKey, activeMenuX, activeMenuY]);

  useEffect(() => {
    if (!contextMenu && !imageContextMenu) {
      return undefined;
    }
    const handlePointerDown = (event: PointerEvent) => {
      if (menuRef.current?.contains(event.target as Node)) {
        return;
      }
      closeMenus();
    };
    const handleKeyDown = (event: KeyboardEvent) => {
      if (event.key === 'Escape') {
        closeMenus();
      }
    };
    window.addEventListener('pointerdown', handlePointerDown);
    window.addEventListener('keydown', handleKeyDown);
    window.addEventListener('scroll', closeMenus, true);
    window.addEventListener('resize', closeMenus);
    return () => {
      window.removeEventListener('pointerdown', handlePointerDown);
      window.removeEventListener('keydown', handleKeyDown);
      window.removeEventListener('scroll', closeMenus, true);
      window.removeEventListener('resize', closeMenus);
    };
  }, [closeMenus, contextMenu, imageContextMenu]);

  return (
    <>
      {contextMenu ? (
        <div
          ref={menuRef}
          className={contextMenuClassName}
          role="menu"
          aria-label={
            contextMenu.kind === 'blank'
              ? '画布右键菜单'
              : contextMenu.kind === 'generation-dialog'
                ? '生成器右键菜单'
                : '图片功能面板'
          }
          style={{
            left: currentMeasuredMenuLayout?.x ?? contextMenu.x,
            top: currentMeasuredMenuLayout?.y ?? contextMenu.y,
          }}
          onContextMenu={(event) => event.preventDefault()}
          onPointerDown={(event) => event.stopPropagation()}
        >
          {contextMenu.kind === 'blank' ? (
            <>
              <button
                type="button"
                role="menuitem"
                disabled={isCanvasClipboardCopyBlocked}
                onClick={() => onPasteCanvasClipboard(contextMenu.canvasPoint)}
              >
                粘贴
              </button>
              <button
                type="button"
                role="menuitem"
                onClick={() => {
                  onUpdateScaleFromCenter(viewport.scale * 1.16);
                  onCloseContextMenu();
                }}
              >
                放大
              </button>
              <button
                type="button"
                role="menuitem"
                onClick={() => {
                  onUpdateScaleFromCenter(viewport.scale * 0.86);
                  onCloseContextMenu();
                }}
              >
                缩小
              </button>
              <button
                type="button"
                role="menuitem"
                onClick={() => {
                  onFitLayers();
                  onCloseContextMenu();
                }}
              >
                显示画布所有元素
              </button>
            </>
          ) : contextMenu.kind === 'generation-dialog' ? (
            <button
              type="button"
              role="menuitem"
              className="image-canvas-editor__context-menu-danger"
              onClick={onDeleteContextLayers}
            >
              删除
            </button>
          ) : (
            <>
              <button
                type="button"
                role="menuitem"
                disabled={!canCopyContextLayers}
                title={layerCopyBlockedTitle}
                onClick={() => onCopyContextLayers()}
              >
                复制
              </button>
              <button
                type="button"
                role="menuitem"
                disabled={!canCopyContextLayers}
                title={layerCopyBlockedTitle}
                onClick={() => onCopyContextLayers({ cut: true })}
              >
                剪切
              </button>
              <button
                type="button"
                role="menuitem"
                disabled={isCanvasClipboardCopyBlocked}
                onClick={() => onPasteCanvasClipboard(contextMenu.canvasPoint)}
              >
                粘贴
              </button>
              <button
                type="button"
                role="menuitem"
                disabled={!canCopyContextLayers}
                title={layerCopyBlockedTitle}
                onClick={onDuplicateContextLayers}
              >
                创建副本
              </button>
              <hr />
              <button
                type="button"
                role="menuitem"
                onClick={() => onMoveContextLayers('up')}
              >
                上移一层
              </button>
              <button
                type="button"
                role="menuitem"
                onClick={() => onMoveContextLayers('down')}
              >
                下移一层
              </button>
              <button
                type="button"
                role="menuitem"
                onClick={() => onMoveContextLayers('top')}
              >
                置于顶层
              </button>
              <button
                type="button"
                role="menuitem"
                onClick={() => onMoveContextLayers('bottom')}
              >
                移动至底层
              </button>
              <hr />
              <button
                type="button"
                role="menuitem"
                onClick={onGroupContextLayers}
              >
                创建组
              </button>
              <button
                type="button"
                role="menuitem"
                onClick={onUngroupContextLayers}
              >
                解除组
              </button>
              <button
                type="button"
                role="menuitem"
                onClick={onToggleContextLayerVisibility}
              >
                {contextShouldShowLayer ? '显示' : '隐藏'}
              </button>
              <button
                type="button"
                role="menuitem"
                onClick={onToggleContextLayerLock}
              >
                {contextShouldUnlockLayer ? '解锁' : '锁定'}
              </button>
              <hr />
              <button
                type="button"
                role="menuitem"
                onClick={() => onFlipContextLayers('x')}
              >
                水平翻转
              </button>
              <button
                type="button"
                role="menuitem"
                onClick={() => onFlipContextLayers('y')}
              >
                垂直翻转
              </button>
              {isImageSequenceLayer ? (
                <div className="image-canvas-editor__context-submenu">
                  <button
                    type="button"
                    role="menuitem"
                    aria-haspopup="menu"
                    className="image-canvas-editor__context-submenu-trigger"
                  >
                    <span>导出为</span>
                    <span aria-hidden="true">›</span>
                  </button>
                  <PlatformFloatingMenu
                    className="image-canvas-editor__context-submenu-panel"
                    label="动作导出选项"
                    placement="bottom-start"
                    style={{ margin: 0 }}
                  >
                    <PlatformFloatingMenuItem
                      className="image-canvas-editor__context-menu-item"
                      onClick={() =>
                        onExportContextLayer({
                          mode: 'sequence-with-preview',
                        })
                      }
                    >
                      序列帧导出（zip）
                    </PlatformFloatingMenuItem>
                    <PlatformFloatingMenuItem
                      className="image-canvas-editor__context-menu-item"
                      onClick={() =>
                        onExportContextLayer({ mode: 'spine-json' })
                      }
                    >
                      Spine 导出（zip）
                    </PlatformFloatingMenuItem>
                  </PlatformFloatingMenu>
                </div>
              ) : (
                <button
                  type="button"
                  role="menuitem"
                  onClick={() => onExportContextLayer()}
                >
                  导出为
                </button>
              )}
              <hr />
              {imageContextMenuLayer ? (
                <>
                  {isQuickEditSupportedLayer(imageContextMenuLayer) ? (
                    <button
                      type="button"
                      role="menuitem"
                      onClick={() => {
                        onOpenQuickEditPanel(imageContextMenuLayer);
                        onCloseContextMenu();
                        onCloseImageContextMenu();
                      }}
                    >
                      快速编辑
                    </button>
                  ) : null}
                  <button
                    type="button"
                    role="menuitem"
                    onClick={() => {
                      onOpenLayerMetadata(imageContextMenuLayer);
                      onCloseContextMenu();
                      onCloseImageContextMenu();
                    }}
                  >
                    查看图片信息
                  </button>
                  {imageContextMenuLayer.assetKind === 'character' ? (
                    <button
                      type="button"
                      role="menuitem"
                      onClick={() => {
                        onOpenCharacterAnimationPanel(imageContextMenuLayer);
                        onCloseContextMenu();
                        onCloseImageContextMenu();
                      }}
                    >
                      生成动画
                    </button>
                  ) : null}
                  <hr />
                </>
              ) : null}
              <button
                type="button"
                role="menuitem"
                className="image-canvas-editor__context-menu-danger"
                onClick={onDeleteContextLayers}
              >
                删除
              </button>
            </>
          )}
        </div>
      ) : null}

      {imageContextMenu && imageContextMenuLayer && !contextMenu ? (
        <div
          ref={menuRef}
          className={contextMenuClassName}
          style={{
            left: currentMeasuredMenuLayout?.x ?? imageContextMenu.x,
            top: currentMeasuredMenuLayout?.y ?? imageContextMenu.y,
          }}
          onPointerDown={(event) => event.stopPropagation()}
        >
          <PlatformFloatingMenu label="图片功能面板" placement="bottom-start">
            {isQuickEditSupportedLayer(imageContextMenuLayer) ? (
              <PlatformFloatingMenuItem
                className="image-canvas-editor__context-menu-item"
                onClick={() => {
                  onOpenQuickEditPanel(imageContextMenuLayer);
                  onCloseImageContextMenu();
                }}
              >
                快速编辑
              </PlatformFloatingMenuItem>
            ) : null}
            <PlatformFloatingMenuItem
              className="image-canvas-editor__context-menu-item"
              onClick={() => {
                onOpenLayerMetadata(imageContextMenuLayer);
                onCloseImageContextMenu();
              }}
            >
              查看图片信息
            </PlatformFloatingMenuItem>
            {imageContextMenuLayer.assetKind === 'character' ? (
              <PlatformFloatingMenuItem
                className="image-canvas-editor__context-menu-item"
                onClick={() => {
                  onOpenCharacterAnimationPanel(imageContextMenuLayer);
                  onCloseImageContextMenu();
                }}
              >
                生成动画
              </PlatformFloatingMenuItem>
            ) : null}
            <PlatformFloatingMenuItem
              className="image-canvas-editor__context-menu-item"
              onClick={() => onDeleteLayerById(imageContextMenuLayer.id)}
            >
              删除图片
            </PlatformFloatingMenuItem>
          </PlatformFloatingMenu>
        </div>
      ) : null}
    </>
  );
}