import { test } from 'node:test';
import assert from 'node:assert/strict';
import { GiteaClient, GiteaApiError } from '../src/gitea.js';

function fakeFetch(handler) {
  return async (url, opts) => handler(url, opts);
}

function jsonResponse(status, body) {
  return {
    ok: status >= 200 && status < 300,
    status,
    text: async () => JSON.stringify(body),
  };
}

test('getPullRequest returns the PR body on success', async () => {
  const client = new GiteaClient({
    baseUrl: 'https://git.example.com',
    token: 't',
    fetchImpl: fakeFetch(async (url) => {
      assert.equal(url, 'https://git.example.com/api/v1/repos/o/r/pulls/5');
      return jsonResponse(200, { head: { ref: 'feature' } });
    }),
  });
  const pr = await client.getPullRequest('o/r', 5);
  assert.equal(pr.head.ref, 'feature');
});

test('getPullRequest returns null on 404 (issue, not a PR)', async () => {
  const client = new GiteaClient({
    baseUrl: 'https://git.example.com',
    token: 't',
    fetchImpl: fakeFetch(async () => jsonResponse(404, { message: 'not found' })),
  });
  const pr = await client.getPullRequest('o/r', 5);
  assert.equal(pr, null);
});

test('getPullRequest rethrows non-404 errors', async () => {
  const client = new GiteaClient({
    baseUrl: 'https://git.example.com',
    token: 't',
    fetchImpl: fakeFetch(async () => jsonResponse(500, { message: 'boom' })),
  });
  await assert.rejects(() => client.getPullRequest('o/r', 5), GiteaApiError);
});

test('createIssueComment sends the expected method, path and body', async () => {
  let captured;
  const client = new GiteaClient({
    baseUrl: 'https://git.example.com/',
    token: 'secret-token',
    fetchImpl: fakeFetch(async (url, opts) => {
      captured = { url, opts };
      return jsonResponse(201, { id: 1 });
    }),
  });
  await client.createIssueComment('o/r', 9, 'hello');
  assert.equal(captured.url, 'https://git.example.com/api/v1/repos/o/r/issues/9/comments');
  assert.equal(captured.opts.method, 'POST');
  assert.equal(captured.opts.headers.Authorization, 'token secret-token');
  assert.deepEqual(JSON.parse(captured.opts.body), { body: 'hello' });
});

test('authenticatedCloneUrl embeds credentials', () => {
  const client = new GiteaClient({ baseUrl: 'https://git.example.com', token: 'abc' });
  assert.equal(client.authenticatedCloneUrl('o/r'), 'https://oauth2:abc@git.example.com/o/r.git');
});

test('trailing slash on baseUrl does not produce a double slash', () => {
  const client = new GiteaClient({ baseUrl: 'https://git.example.com/', token: 'abc' });
  assert.equal(client.baseUrl, 'https://git.example.com');
});