import clsx from "clsx";
import { useState } from "react";

type DisplayMode = "modal" | "embedded";
type EmbeddedPosition =
  | "bottom-right"
  | "bottom-left"
  | "top-right"
  | "top-left";

interface ModalProps {
  isOpen: boolean;
  onClose: () => void;
  children?: React.ReactNode;
  className?: string;
  mode?: DisplayMode;
  position?: EmbeddedPosition;
  width?: string | number;
  height?: string | number;
  showMask?: boolean;
}

export const Modal = ({
  isOpen,
  onClose,
  children,
  className,
  mode = "modal",
  position = "bottom-right",
  width,
  height,
  showMask = true,
}: ModalProps) => {
  if (!isOpen) return null;

  // 嵌入式客服对话框模式
  if (mode === "embedded") {
    const getPosition = () => {
      switch (position) {
        case "bottom-right":
          return "bottom-6 right-6";
        case "bottom-left":
          return "bottom-6 left-6";
        case "top-right":
          return "top-6 right-6";
        case "top-left":
          return "top-6 left-6";
      }
    };

    const defaultWidth = width || "400px";
    const defaultHeight = height || "600px";

    return (
      <div
        className={clsx(
          "fixed z-[9999] bg-transparent  overflow-hidden border border-transparent",
          "transition-all duration-300 ease-out",
          "animate-scale-in",
          getPosition(),
          className
        )}
        style={{
          width: defaultWidth,
          height: defaultHeight,
          maxHeight: "calc(100vh - 3rem)",
          maxWidth: "calc(100vw - 3rem)",
        }}
      >
        {/* 关闭/最小化按钮 */}
        <button
          onClick={onClose}
          className="absolute top-3 right-3 z-10 w-7 h-7 flex items-center justify-center bg-white hover:bg-gray-100 rounded-full transition-colors shadow-sm border border-gray-200"
          title="最小化"
        >
          <span className="text-gray-500 text-lg font-bold leading-none">
            −
          </span>
        </button>

        {/* 内容 */}
        <div className="h-full w-full">{children}</div>
      </div>
    );
  }

  // 传统弹窗模式
  return (
    <div className="fixed inset-0 z-50 flex items-center justify-center">
      {/* 背景遮罩 */}
      {showMask && (
        <div
          className="absolute inset-0 bg-black/80 backdrop-blur-sm"
          onClick={onClose}
        />
      )}

      {/* 弹窗内容 */}
      <div
        className={clsx(
          "relative bg-white rounded-lg shadow-xl max-w-7xl max-h-[100vh] w-full mx-4",
          className
        )}
        style={{
          width: width,
          height: height,
        }}
      >
        {/* 关闭按钮 */}
        <button
          onClick={onClose}
          className="absolute top-4 right-4 z-10 w-8 h-8 flex items-center justify-center bg-gray-200 hover:bg-gray-300 rounded-full transition-colors"
        >
          <span className="text-gray-600 text-xl font-bold">×</span>
        </button>

        {/* 弹窗内容 */}
        <div className="h-full">{children}</div>
      </div>
    </div>
  );
};

interface IframeModalProps {
  isOpen: boolean;
  onClose: () => void;
  url: string;
  title?: string;
  mode?: DisplayMode;
  position?: EmbeddedPosition;
  width?: string | number;
  height?: string | number;
  showMask?: boolean;
}

export const IframeModal = ({
  isOpen,
  onClose,
  url,
  title,
  mode = "modal",
  position = "bottom-right",
  width,
  height,
  showMask = true,
}: IframeModalProps) => {
  const [hasError, setHasError] = useState(false);
  const [isLoading, setIsLoading] = useState(true);
  const [errorType, setErrorType] = useState<
    "network" | "security" | "unknown"
  >("unknown");

  const handleIframeError = () => {
    setHasError(true);
    setIsLoading(false);
    setErrorType("network");
  };

  const handleIframeLoad = () => {
    setIsLoading(false);
    setHasError(false);

    // 监听iframe内部的错误
    const iframe = document.querySelector("iframe");
    if (iframe) {
      try {
        iframe.contentWindow?.addEventListener("error", (event) => {
          console.error("Iframe内部错误:", event);
          if (
            event.message?.includes("VideoDecoder") ||
            event.message?.includes("WebCodecs")
          ) {
            setErrorType("security");
            setHasError(true);
          }
        });
      } catch {
        console.log("无法访问iframe内容，这是正常的跨域限制");
      }
    }
  };

  return (
    <Modal
      isOpen={isOpen}
      onClose={onClose}
      mode={mode}
      position={position}
      width={width}
      height={height}
      showMask={showMask}
      className={mode === "modal" ? "max-w-5xl" : ""}
    >
      <div className="h-full flex flex-col">
        {title && mode === "modal" && (
          <div className="px-6 py-4 border-b border-transparent">
            <h3 className="text-lg font-semibold text-gray-800">{title}</h3>
          </div>
        )}
        <div className="flex-1 relative">
          {isLoading && (
            <div className="absolute inset-0 flex items-center justify-center bg-transparent">
              <div className="text-center">
                <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-blue-500 mx-auto mb-4"></div>
                <p className="text-gray-600">正在加载...</p>
              </div>
            </div>
          )}

          {hasError ? (
            <div className="absolute inset-0 flex items-center justify-center bg-transparent">
              <div className="text-center">
                <div className="text-red-500 text-6xl mb-4">⚠️</div>
                <h3 className="text-lg font-semibold text-gray-800 mb-2">
                  {errorType === "security" ? "页面功能受限" : "页面加载失败"}
                </h3>
                <p className="text-gray-600 mb-4">
                  {errorType === "security"
                    ? "该页面使用了高级视频处理功能，在嵌入模式下可能无法正常工作"
                    : "由于安全策略限制，无法在此窗口中显示该页面"}
                </p>
                <p className="text-sm text-gray-500">
                  {errorType === "security"
                    ? "建议在支持的浏览器中直接访问该页面"
                    : "请检查网络连接或稍后重试"}
                </p>
              </div>
            </div>
          ) : (
            <iframe
              src={url}
              className="w-full h-full border-0 bg-transparent"
              title={title || "嵌入页面"}
              allow="microphone; camera; autoplay; fullscreen; encrypted-media; picture-in-picture; web-share; accelerometer; gyroscope; magnetometer; payment; usb; serial; bluetooth; xr-spatial-tracking"
              referrerPolicy="no-referrer-when-downgrade"
              loading="lazy"
              onError={handleIframeError}
              onLoad={handleIframeLoad}
            />
          )}
        </div>
      </div>
    </Modal>
  );
};