/**
 * Cookie configuration for authentication
 * All cookies use 'rev.' prefix, HttpOnly, Secure, SameSite=Lax
 */

export const COOKIE_NAMES = {
  SESSION_TOKEN: "rev.session_token",
  DEVICE_FINGERPRINT: "rev.device_fingerprint",
  LOGIN_REQUEST_TOKEN: "rev.login_request_token",
} as const;

export const COOKIE_DURATIONS = {
  SESSION: 60 * 60 * 24 * 7, // 7 days in seconds
  DEVICE_FINGERPRINT: 60 * 60 * 24 * 365, // 1 year in seconds
  LOGIN_REQUEST: 60 * 15, // 15 minutes in seconds
} as const;

export const TOKEN_DURATIONS = {
  EMAIL_VERIFICATION: 60 * 60 * 24, // 24 hours in seconds
  PASSWORD_RESET: 60 * 60, // 1 hour in seconds
} as const;

// Base cookie options (all cookies share these)
const baseCookieOptions = {
  httpOnly: true,
  secure: true,
  sameSite: "lax" as const,
  path: "/",
};

export const COOKIE_OPTIONS = {
  session: { ...baseCookieOptions, maxAge: COOKIE_DURATIONS.SESSION },
  device: {
    ...baseCookieOptions,
    maxAge: COOKIE_DURATIONS.DEVICE_FINGERPRINT,
  },
  loginRequest: {
    ...baseCookieOptions,
    maxAge: COOKIE_DURATIONS.LOGIN_REQUEST,
  },
} as const;

/**
 * Cookie options type for setCookie function
 */
export interface CookieOptions {
  httpOnly?: boolean;
  secure?: boolean;
  sameSite?: "strict" | "lax" | "none";
  path?: string;
  maxAge?: number;
}

/**
 * Parse cookie string and get a specific cookie value
 */
export const getCookie = (
  headers: Headers,
  name: string,
): string | undefined => {
  const cookieHeader = headers.get("Cookie");
  if (!cookieHeader) {
    return undefined;
  }

  const cookies = cookieHeader.split(";").map((c) => c.trim());
  for (const cookie of cookies) {
    const [cookieName, ...valueParts] = cookie.split("=");
    if (cookieName === name) {
      return valueParts.join("=");
    }
  }
  return undefined;
};

/**
 * Set a cookie in the response headers
 */
export const setCookie = (
  headers: Headers,
  name: string,
  value: string,
  options: CookieOptions,
): void => {
  const parts = [`${name}=${value}`];
  if (options.httpOnly) {
    parts.push("HttpOnly");
  }
  if (options.secure) {
    parts.push("Secure");
  }
  if (options.sameSite) {
    parts.push(`SameSite=${options.sameSite}`);
  }
  if (options.path) {
    parts.push(`Path=${options.path}`);
  }
  if (options.maxAge) {
    parts.push(`Max-Age=${String(options.maxAge)}`);
  }
  headers.append("Set-Cookie", parts.join("; "));
};

/**
 * Delete a cookie by setting it to expire immediately
 */
export const deleteCookie = (headers: Headers, name: string): void => {
  headers.append("Set-Cookie", `${name}=; Path=/; Max-Age=0`);
};