/**
 * InitiateConnectionDialog Component
 * Dialog for initiating a new federation connection
 */

import { useState, useEffect } from "react";

interface InitiateConnectionDialogProps {
  open: boolean;
  onInitiate: (url: string) => void;
  onCancel: () => void;
  isLoading?: boolean;
  error?: string;
}

/**
 * Validate if a string is a valid URL
 */
function isValidUrl(url: string): boolean {
  try {
    const parsedUrl = new URL(url);
    return parsedUrl.protocol === "http:" || parsedUrl.protocol === "https:";
  } catch {
    return false;
  }
}

export function InitiateConnectionDialog({
  open,
  onInitiate,
  onCancel,
  isLoading = false,
  error,
}: InitiateConnectionDialogProps): React.JSX.Element | null {
  const [url, setUrl] = useState("");
  const [validationError, setValidationError] = useState("");

  // Clear input when dialog closes
  useEffect(() => {
    if (!open) {
      setUrl("");
      setValidationError("");
    }
  }, [open]);

  if (!open) {
    return null;
  }

  const handleConnect = (): void => {
    // Validate URL
    if (!url.trim()) {
      setValidationError("Please enter a URL");
      return;
    }

    if (!isValidUrl(url)) {
      setValidationError("Please enter a valid URL (must start with http:// or https://)");
      return;
    }

    setValidationError("");
    onInitiate(url);
  };

  const handleKeyPress = (e: React.KeyboardEvent<HTMLInputElement>): void => {
    if (e.key === "Enter" && url.trim() && !isLoading) {
      handleConnect();
    }
  };

  return (
    <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center p-4 z-50">
      <div className="bg-white rounded-lg max-w-md w-full p-6">
        {/* Header */}
        <h2 className="text-xl font-semibold text-gray-900 mb-2">Connect to Remote Instance</h2>
        <p className="text-sm text-gray-600 mb-6">
          Enter the URL of the Mosaic Stack instance you&apos;d like to connect to
        </p>

        {/* URL Input */}
        <div className="mb-4">
          <label htmlFor="instance-url" className="block text-sm font-medium text-gray-700 mb-2">
            Instance URL
          </label>
          <input
            id="instance-url"
            type="url"
            value={url}
            onChange={(e) => {
              setUrl(e.target.value);
              setValidationError("");
            }}
            onKeyDown={handleKeyPress}
            disabled={isLoading}
            placeholder="https://mosaic.example.com"
            className="w-full px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:ring-2 focus:ring-blue-500 disabled:bg-gray-100 disabled:cursor-not-allowed"
          />
          {validationError && <p className="text-sm text-red-600 mt-1">{validationError}</p>}
        </div>

        {/* Error Message */}
        {error && (
          <div className="mb-4 p-3 bg-red-50 border border-red-200 rounded-md">
            <p className="text-sm text-red-600">{error}</p>
          </div>
        )}

        {/* Actions */}
        <div className="flex gap-3 justify-end">
          <button
            onClick={onCancel}
            disabled={isLoading}
            className="px-4 py-2 text-gray-700 bg-gray-100 rounded-md hover:bg-gray-200 transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
          >
            Cancel
          </button>
          <button
            onClick={handleConnect}
            disabled={!url.trim() || isLoading}
            className="px-4 py-2 bg-blue-600 text-white rounded-md hover:bg-blue-700 transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
          >
            {isLoading ? "Connecting..." : "Connect"}
          </button>
        </div>
      </div>
    </div>
  );
}