'use strict';

const test = require('node:test');
const assert = require('node:assert/strict');
const { buildPlaylist } = require('../src/playlist');

function fakeRequest() {
  return { headers: { host: 'example.test:8080' }, socket: {} };
}

const event = {
  key: 'a',
  title: 'Standard de Liège - SK Beveren',
  startAt: new Date('2026-11-06T18:25:00Z'),
  endAt: new Date('2026-11-06T20:55:00Z'),
};

test('playlist always contains three fixed channels', () => {
  const scheduler = {
    getSlotCount: () => 3,
    getSlotEvent: (index) => (index === 0 ? event : null),
  };
  const body = buildPlaylist(fakeRequest(), scheduler);
  const lines = body.trim().split('\n');

  assert.equal(lines[0], '#EXTM3U');
  assert.equal(
    lines[1],
    '#EXTINF:-1 tvg-id="jupiler-1" tvg-name="Jupiler 1" tvg-chno="1",Jupiler 1'
  );
  assert.equal(lines[2], 'http://example.test:8080/stream/1');
  assert.ok(body.includes('#EXTINF:-1 tvg-id="jupiler-2" tvg-name="Jupiler 2" tvg-chno="2",Jupiler 2'));
  assert.ok(body.includes('#EXTINF:-1 tvg-id="jupiler-3" tvg-name="Jupiler 3" tvg-chno="3",Jupiler 3'));
  assert.ok(body.includes('http://example.test:8080/stream/3'));
});

test('channel metadata stays identical when the assigned event changes', () => {
  const first = {
    getSlotCount: () => 3,
    getSlotEvent: (index) => (index === 0 ? event : null),
  };
  const second = {
    getSlotCount: () => 3,
    getSlotEvent: (index) =>
      index === 0
        ? {
            key: 'b',
            title: 'Anderlecht - Genk',
            startAt: new Date('2026-11-06T21:00:00Z'),
            endAt: new Date('2026-11-06T23:30:00Z'),
          }
        : null,
  };
  const channelLines = (body) => body.split('\n').filter((line) => line.startsWith('#EXTINF'));
  assert.deepEqual(
    channelLines(buildPlaylist(fakeRequest(), first)),
    channelLines(buildPlaylist(fakeRequest(), second))
  );
});