/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/**
 * The Anthropic AI SDK expects a versioned API prefix and appends
 * `/messages` internally. Maka's provider defaults are user-facing roots
 * (`https://api.anthropic.com`) because our manual probes append `/v1/...`.
 * Keep the translation centralized so OAuth/API-key sends and probes do not
 * drift into `https://api.anthropic.com/messages` or `/v1/v1/...`.
 */
export function anthropicRootUrl(baseUrl: string): string {
  return stripTrailing(baseUrl).replace(/\/v1$/i, '');
}

export function anthropicV1BaseUrl(baseUrl: string): string {
  return `${anthropicRootUrl(baseUrl)}/v1`;
}

export function anthropicV1Url(baseUrl: string, path: string): string {
  const cleanPath = path.startsWith('/') ? path : `/${path}`;
  return `${anthropicV1BaseUrl(baseUrl)}${cleanPath}`;
}

/**
 * Normalize a Google AI base URL to a single `/v1beta` suffix: a bare-root
 * override self-heals to `/v1beta` instead of 404ing on
 * `/models/{model}:generateContent`.
 */
export function googleV1BetaBaseUrl(baseUrl: string): string {
  return `${stripTrailing(baseUrl).replace(/\/v1beta$/i, '')}/v1beta`;
}

/**
 * The model-list fetcher and the connection probe route through here; the chat
 * path uses `googleV1BetaBaseUrl` directly via `createGoogle`.
 */
export function googleApiUrl(baseUrl: string, path: string, apiKey: string): string {
  const cleanPath = path.startsWith('/') ? path : `/${path}`;
  return `${googleV1BetaBaseUrl(baseUrl)}${cleanPath}?key=${encodeURIComponent(apiKey)}`;
}

/** Normalize an Open Responses endpoint without assuming a `/v1` prefix. */
export function openResponsesUrl(baseUrl: string): string {
  const url = new URL(baseUrl);
  const basePath = url.pathname.replace(/\/+$/, '').replace(/\/responses$/i, '');
  url.pathname = `${basePath}/responses`;
  return url.toString();
}

/**
 * Inverse of {@link openResponsesUrl} for the native OpenAI adapter: it
 * appends `/responses` internally, so an endpoint-form override
 * (`…/v1/responses`, which the probe accepts) must be reduced back to its
 * base or the model request lands on `/responses/responses` (#2972).
 */
export function openAiResponsesBaseUrl(baseUrl: string): string {
  const url = new URL(baseUrl);
  url.pathname = url.pathname.replace(/\/+$/, '').replace(/\/responses$/i, '');
  return url.toString();
}

function stripTrailing(u: string): string {
  return u.replace(/\/+$/, '');
}