import { customElement, noShadowDOM } from "solid-element";
import {Show, For, createResource, createMemo, createSignal} from "solid-js";
import { TbOutlineCopy } from "solid-icons/tb";
import { resolvePath } from "./utils/path";
import { createPinsStore } from "./stores/pinsStore";

customElement("md-pins", { pins: "", fixed: false, labelStart: "A" }, (props, { element }) => {
  noShadowDOM();

  const [showToast, setShowToast] = createSignal(false);

  // 创建 store
  const store = createPinsStore(props.pins, props.fixed, props.labelStart);

  // 从 element 的 textContent 获取图片路径
  const rawSrc = element?.textContent?.trim() || '';

  // 设置 rawSrc 到 store
  store.setRawSrc(rawSrc);

  // 隐藏原始文本内容
  if (element) {
    element.textContent = "";
  }

  // 从父节点 article 的 data-src 获取当前 markdown 文件完整路径
  const articleEl = element?.closest('article[data-src]');
  const articlePath = articleEl?.getAttribute('data-src') || '';

  // 解析相对路径
  const resolvedSrc = resolvePath(articlePath, rawSrc);

  // 加载图片
  const loadImage = (src: string): Promise<HTMLImageElement> => {
    return new Promise((resolve, reject) => {
      const img = new Image();
      img.onload = () => resolve(img);
      img.onerror = reject;
      img.src = src;
    });
  };

  const [image] = createResource(resolvedSrc, loadImage);
  const visible = createMemo(() => !image.loading && !!image());

  // 添加 pin
  const addPin = (e: MouseEvent) => {
    e.preventDefault();
    e.stopPropagation();

    if (props.fixed) return;

    const imgRect = (e.target as Element).getBoundingClientRect();
    const clickX = ((e.clientX - imgRect.left) / imgRect.width) * 100;
    const clickY = ((e.clientY - imgRect.top) / imgRect.height) * 100;

    const x = Math.round(clickX);
    const y = Math.round(clickY);

    store.addPin(x, y);
  };

  // 删除 pin
  const removePin = (index: number, e: MouseEvent) => {
    e.preventDefault();
    e.stopPropagation();

    if (props.fixed) return;

    store.removePin(index);
  };

  // 复制所有 pin 为 :md-editor-pin 格式
  const copyPins = () => {
    const text = store.getCopyText();

    navigator.clipboard.writeText(text).then(() => {
      setShowToast(true);
      setTimeout(() => setShowToast(false), 2000);
    }).catch(err => {
      console.error('复制失败:', err);
    });
  };

  return (
    <div>
      <Show when={visible()}>
        {/* 图片容器 */}
        <div class="relative" onClick={addPin}>
          {/* 显示图片 */}
          <img src={resolvedSrc} alt="" class="inset-0" />

          {/* 透明遮罩层 */}
          <Show when={!props.fixed}>
            <div class="absolute inset-0 bg-transparent hover:bg-black/10 transition-colors cursor-crosshair" />
          </Show>
          <Show when={props.fixed}>
            <div class="absolute inset-0 pointer-events-none" />
          </Show>

          {/* 复制按钮 HUD */}
          <Show when={!props.fixed}>
            <div class="absolute top-2 right-2 z-20">
              <button
                onClick={(e) => {
                  e.stopPropagation();
                  copyPins();
                }}
                class="bg-gray-800 hover:bg-gray-700 text-white px-3 py-1.5 rounded shadow-lg text-sm flex items-center gap-1 transition-colors"
                title="复制所有 pin 坐标"
              >
                <TbOutlineCopy /> 复制
              </button>
            </div>
          </Show>

          {/* Pin 列表 */}
          <For each={store.state.pins}>
            {(pin, index) => (
              <span
                onClick={(e) => removePin(index(), e)}
                class={`absolute transform -translate-x-1/2 -translate-y-1/2 pointer-events-auto
                       bg-red-500 text-white text-xs font-bold rounded-full w-6 h-6
                       flex items-center justify-center shadow-lg
                       ${!props.fixed ? 'cursor-pointer hover:bg-red-600 hover:scale-110 transition-all z-10' : 'cursor-default z-10'}`}
                style={{
                  left: `${pin.x}%`,
                  top: `${pin.y}%`
                }}
                title={props.fixed ? `(${pin.x}, ${pin.y})` : `点击删除 (${pin.x}, ${pin.y})`}
              >
                {pin.label}
              </span>
            )}
          </For>
        </div>
      </Show>

      {/* Toast 提示 */}
      <Show when={showToast()}>
        <div class="fixed bottom-4 left-1/2 transform -translate-x-1/2 bg-gray-800 text-white px-4 py-2 rounded shadow-lg text-sm z-50">
          已复制 {store.state.pins.length} 个 pin 坐标
        </div>
      </Show>
    </div>
  );
});