import { generateFixedHash, isValidId } from "./stringUtil";

/**
 * Processes a user-entered camera name and returns both the final camera name
 * and friendly name for Frigate configuration.
 *
 * @param userInput - The name entered by the user (could be display name)
 * @returns Object with finalCameraName and friendlyName
 */
export function processCameraName(userInput: string): {
  finalCameraName: string;
  friendlyName?: string;
} {
  const normalizedInput = userInput.replace(/\s+/g, "_").toLowerCase();

  if (isValidId(normalizedInput)) {
    return {
      finalCameraName: normalizedInput,
      friendlyName: userInput.includes(" ") ? userInput : undefined,
    };
  }

  return {
    finalCameraName: generateFixedHash(userInput, "cam"),
    friendlyName: userInput,
  };
}

// ==================== Reolink Camera Detection ====================

/**
 * Detect Reolink camera capabilities and recommend optimal protocol
 *
 * Calls the Frigate backend API which queries the Reolink camera to determine
 * its resolution and recommends either http-flv (for 5MP and below) or rtsp
 * (for higher resolutions).
 *
 * @param host - Camera IP address or hostname
 * @param username - Camera username
 * @param password - Camera password
 * @returns The recommended protocol key ("http-flv" or "rtsp"), or null if detection failed
 */
export async function detectReolinkCamera(
  host: string,
  username: string,
  password: string,
): Promise<"http-flv" | "rtsp" | null> {
  try {
    const params = new URLSearchParams({
      host,
      username,
      password,
    });

    const response = await fetch(`/api/reolink/detect?${params.toString()}`, {
      method: "GET",
    });

    if (!response.ok) {
      return null;
    }

    const data = await response.json();

    if (data.success && data.protocol) {
      return data.protocol;
    }

    return null;
  } catch (error) {
    return null;
  }
}

/**
 * Mask credentials in RTSP URIs for display
 */
export function maskUri(uri: string): string {
  try {
    // Handle RTSP URLs with user:pass@host format
    const rtspMatch = uri.match(/rtsp:\/\/([^:]+):([^@]+)@(.+)/);
    if (rtspMatch) {
      return `rtsp://${rtspMatch[1]}:${"*".repeat(4)}@${rtspMatch[3]}`;
    }

    // Handle HTTP/HTTPS URLs with password query parameter
    const urlObj = new URL(uri);
    if (urlObj.searchParams.has("password")) {
      urlObj.searchParams.set("password", "*".repeat(4));
      return urlObj.toString();
    }
  } catch (e) {
    // ignore
  }
  return uri;
}