import { setupTest, startEngine, startClientInTmux, openCmdFifo, writeFifoCommand, wait, readStatusNonBlock, teardownTest } from './test_utils';

export async function testChannelAddRemove(): Promise<void> {
  console.log("\nTest: CHANNEL ADD / REMOVE");
  setupTest();
  const engine = await startEngine();
  await startClientInTmux();
  openCmdFifo();
  await wait(500);

  // Send "add" command via FIFO
  writeFifoCommand("add");
  await wait(1000);

  // Read status lines and look for CH=1 (channel 1 active)
  const st = readStatusNonBlock();
  // Count channels by counting lines starting with "CH="
  let channelCount = 0;
  for (const line of st.split("\n")) {
    if (line.startsWith("CH=")) channelCount++;
  }
  // Initially channel 0 was present; after add we expect at least 2 channels
  if (channelCount >= 2) {
    console.log("  PASS: Channel added (saw " + channelCount + " channels in status)");
  } else {
    // Wait a little more and retry
    await wait(1000);
    const st2 = readStatusNonBlock();
    let channelCount2 = 0;
    for (const line of st2.split("\n")) {
      if (line.startsWith("CH=")) channelCount2++;
    }
    if (channelCount2 >= 2) {
      console.log("  PASS: Channel added (saw " + channelCount2 + " channels in status)");
    } else {
      console.log("  WARN: Could not verify new channel in status (got " + channelCount2 + " channels)");
      console.log("  Status data: " + st2);
    }
  }

  engine.kill();
  teardownTest();
}