import { useState, useCallback, useMemo } from 'react';
import debounce from 'lodash.debounce';

import type { MCPOption } from '../types';

import { useThemeHooks } from './use-theme-hooks';
import { useMCPConfig } from './use-mcp-config';
import { ClipboardService } from '../utils/clipboard-service';

export type McpButtonOptions = {
  options?: MCPOption[];
};

export type McpButtonSettings = {
  isCopied: boolean;
  cursorUrl: string;
  vscodeUrl: string;
  triggerButtonText: string;
  visibleOptions: MCPOption[];
  handleAction: (action: MCPOption) => void;
};

const COPIED_RESET_TIMEOUT = 1000;

export function useConnectMCPButton({
  options = ['cursor', 'vscode', 'copy'],
}: McpButtonOptions = {}): McpButtonSettings {
  const { useTranslate } = useThemeHooks();
  const { translate } = useTranslate();
  const { serverName, serverUrl, cursorUrl, vscodeUrl } = useMCPConfig();
  const [isCopied, setIsCopied] = useState(false);

  // eslint-disable-next-line react-hooks/exhaustive-deps
  const resetCopied = useCallback(
    debounce(() => setIsCopied(false), COPIED_RESET_TIMEOUT),
    [],
  );

  const handleAction = useCallback(
    (action: MCPOption) => {
      if (action === 'copy') {
        const config = {
          [serverName]: {
            url: serverUrl,
            description: 'MCP Server',
          },
        };
        ClipboardService.copyCustom(JSON.stringify(config, null, 2));
        setIsCopied(true);
        resetCopied();
        return;
      }

      const urlMap: Record<Exclude<MCPOption, 'copy'>, string> = {
        cursor: cursorUrl,
        vscode: vscodeUrl,
      };

      window.open(urlMap[action], '_blank');
    },
    [cursorUrl, vscodeUrl, serverUrl, serverName, resetCopied],
  );

  const triggerButtonText = useMemo(
    () => translate('page.actions.connectMcp', 'Connect MCP'),
    [translate],
  );

  const visibleOptions = useMemo(() => options.filter(Boolean), [options]);

  return {
    isCopied,
    cursorUrl,
    vscodeUrl,
    triggerButtonText,
    visibleOptions,
    handleAction,
  };
}