import { useEffect, useLayoutEffect, useRef, useState } from 'react';
import { createPortal } from 'react-dom';

import {
  contextAssetMediaSrc,
  type EditorAgentContextAsset,
  EditorAgentRightClickAction,
  type RightClickMenuTarget,
} from './common.ts';

type MessageBubbleRightClickMenuProps = {
  x: number;
  y: number;
  target: RightClickMenuTarget;
  pendingAction: EditorAgentRightClickAction | null;
  resultAction: EditorAgentRightClickAction | null;
  result: 'success' | 'error' | null;
  onAction: (action: EditorAgentRightClickAction) => void;
  onClose: () => void;
};

const VIEWPORT_MARGIN = 8;

function actionLabel({
  action,
  idleLabel,
  pendingAction,
  resultAction,
  result,
}: {
  action: EditorAgentRightClickAction;
  idleLabel: string;
  pendingAction: EditorAgentRightClickAction | null;
  resultAction: EditorAgentRightClickAction | null;
  result: 'success' | 'error' | null;
}) {
  if (pendingAction === action) {
    return action === EditorAgentRightClickAction.DownloadAsset
      ? '下载中'
      : action === EditorAgentRightClickAction.ReferenceImage
        ? '引用中'
        : '复制中';
  }
  if (resultAction !== action) {
    return idleLabel;
  }
  if (result === 'success') {
    return action === EditorAgentRightClickAction.DownloadAsset
      ? '已下载'
      : action === EditorAgentRightClickAction.ReferenceImage
        ? '已引用'
        : '已复制';
  }
  if (result === 'error') {
    return action === EditorAgentRightClickAction.DownloadAsset
      ? '下载失败'
      : action === EditorAgentRightClickAction.ReferenceImage
        ? '引用失败'
        : '复制失败';
  }
  return idleLabel;
}

function assetDownloadLabel(asset: EditorAgentContextAsset) {
  return `下载${
    asset.mediaType === 'image'
      ? '图片'
      : asset.mediaType === 'video'
        ? '视频'
        : '音频'
  }`;
}

export function MessageBubbleRightClickMenu({
  x,
  y,
  target,
  pendingAction,
  resultAction,
  result,
  onAction,
  onClose,
}: MessageBubbleRightClickMenuProps) {
  const menuRef = useRef<HTMLDivElement | null>(null);
  const [position, setPosition] = useState<{ x: number; y: number } | null>(
    null,
  );

  useLayoutEffect(() => {
    const menu = menuRef.current;
    if (!menu || typeof window === 'undefined') {
      return;
    }
    const rect = menu.getBoundingClientRect();
    setPosition({
      x: Math.min(
        Math.max(x, VIEWPORT_MARGIN),
        Math.max(
          VIEWPORT_MARGIN,
          window.innerWidth - rect.width - VIEWPORT_MARGIN,
        ),
      ),
      y: Math.min(
        Math.max(y, VIEWPORT_MARGIN),
        Math.max(
          VIEWPORT_MARGIN,
          window.innerHeight - rect.height - VIEWPORT_MARGIN,
        ),
      ),
    });
  }, [target.kind, x, y]);

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

  if (typeof document === 'undefined') {
    return null;
  }

  return createPortal(
    <div
      ref={menuRef}
      className="image-canvas-editor__context-menu"
      role="menu"
      aria-label={target.kind === 'text' ? '消息右键菜单' : '消息素材右键菜单'}
      style={{
        left: position?.x ?? x,
        top: position?.y ?? y,
        zIndex: 60,
      }}
      onContextMenu={(event) => event.preventDefault()}
    >
      {target.kind === 'text' ? (
        <button
          type="button"
          role="menuitem"
          disabled={pendingAction !== null}
          onClick={() => onAction(EditorAgentRightClickAction.CopyText)}
        >
          {actionLabel({
            action: EditorAgentRightClickAction.CopyText,
            idleLabel: '复制文本',
            pendingAction,
            resultAction,
            result,
          })}
        </button>
      ) : (
        <>
          {target.asset.mediaType === 'image' ? (
            <>
              {contextAssetMediaSrc(target.asset).trim() ? (
                <button
                  type="button"
                  role="menuitem"
                  disabled={pendingAction !== null}
                  onClick={() =>
                    onAction(EditorAgentRightClickAction.ReferenceImage)
                  }
                >
                  {actionLabel({
                    action: EditorAgentRightClickAction.ReferenceImage,
                    idleLabel: '引用',
                    pendingAction,
                    resultAction,
                    result,
                  })}
                </button>
              ) : null}
              <button
                type="button"
                role="menuitem"
                disabled={pendingAction !== null}
                onClick={() => onAction(EditorAgentRightClickAction.CopyImage)}
              >
                {actionLabel({
                  action: EditorAgentRightClickAction.CopyImage,
                  idleLabel: '复制图片',
                  pendingAction,
                  resultAction,
                  result,
                })}
              </button>
            </>
          ) : null}
          <button
            type="button"
            role="menuitem"
            disabled={pendingAction !== null}
            onClick={() => onAction(EditorAgentRightClickAction.DownloadAsset)}
          >
            {actionLabel({
              action: EditorAgentRightClickAction.DownloadAsset,
              idleLabel: assetDownloadLabel(target.asset),
              pendingAction,
              resultAction,
              result,
            })}
          </button>
        </>
      )}
    </div>,
    document.body,
  );
}