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

export async function testRapidKeyMashConsistency(): Promise<void> {
  console.log("\nTest: RAPID KEY MASH CONSISTENCY (burst of 10 keys, verify pane)");
  setupTest();
  const engine = await startEngine();
  await startClientInTmux();
  openCmdFifo();
  await wait(500);

  // Add channels up to column 5
  for (let i = 1; i <= 5; i++) {
    writeFifoCommand("add");
    await wait(100);
  }

  const ITERATIONS = 20;
  for (let iter = 0; iter < ITERATIONS; iter++) {
    const seed = iter * 7;
    let keys = "";
    for (let k = 0; k < 10; k++) {
      const dir = (seed + k) % 4;
      switch (dir) {
        case 0: keys += "l"; break;
        case 1: keys += "h"; break;
        case 2: keys += "j"; break;
        case 3: keys += "k"; break;
      }
    }
    keys += "t"; // record
    tmuxSendKeys("looper", "0", keys);
    await wait(500);

    // Capture pane
    const pane = tmuxCapturePane("looper", "0");

    // 1. Selected line must be present
    const selMatch = pane.match(/Selected: Grid \d+, Row (\d+), Col (\d+)/);
    if (!selMatch) {
      console.log(`  FAIL at iteration ${iter}: No selected line in pane`);
      console.log("  Pane:\n" + pane.slice(0, 500));
      engine.kill(); teardownTest();
      throw new Error("Selected line missing after burst");
    }

    const row = parseInt(selMatch[1]);
    const col = parseInt(selMatch[2]);
    if (row < 0 || row > 7 || col < 0 || col > 7) {
      console.log(`  FAIL at iteration ${iter}: selected (${row},${col}) out of bounds`);
      engine.kill(); teardownTest();
      throw new Error("Selected cell out of bounds after burst");
    }

    // 2. At least one 'R' must appear in the pane
    const hasR = pane.includes("R");
    if (!hasR) {
      console.log(`  FAIL at iteration ${iter}: No 'R' found after burst`);
      console.log("  Pane:\n" + pane.slice(0, 1000));
      engine.kill(); teardownTest();
      throw new Error("No 'R' indicator after rapid key mash");
    }

    // 3. Toggle back to idle for next iteration
    tmuxSendKeys("looper", "0", "t");
    await wait(300);
  }

  console.log("  PASS: Rapid key mash consistency maintained over " + ITERATIONS + " iterations");
  engine.kill();
  teardownTest();
}