// Optimized paths must match the full roof scan and the original heat loop exactly.
const fs = require('fs');
const { load, suite, flatWorld } = require('./harness');
const { run } = load();
const { check, done } = suite();
run(fs.readFileSync(__dirname + '/fixtures/heat-chunk.js', 'utf8'));

// Partial areas and changes at area boundaries, including material appearing in empty sky.
flatWorld(run, 99, 97, 80);
run('RS = 123; bot.x = 45; bot.y = 30;');
run(`
  const originalWeatherTick = weatherTick;
  weatherTick = function () {
    if (tick % 20 === 1) {
      const roof = roofY.slice(); updateRoof();
      if (!roof.every((v, x) => v === roofY[x])) globalThis.__roofMiss = (globalThis.__roofMiss || 0) + 1;
    }
    originalWeatherTick();
  };
`);
for (let k = 0; k < 200; k++) run(`
  setCell((12 + ${k} % 60) * W + (${k} * 31 % W), ${k} % 3 ? WATER : EMPTY, 18, 0);
  simTick();
`);
check('scheduled roof matches a full scan at area edges', !run('globalThis.__roofMiss'), run('globalThis.__roofMiss'));
run('weatherTick = originalWeatherTick;');

// Every material, threshold neighbours, fractional temperatures, burning, cold neighbours,
// alternating heat scales, and partial areas exercise both random calls and Float32 stores.
const snapshot = () => run(`JSON.stringify({
  arrays: [mat, temp, life, flags, hot, hotLvl, part, digp, seen].map(a => Array.from(new Uint8Array(a.buffer))),
  RS, stats, EV, brokenMachines
})`);
const setup = () => {
  flatWorld(run, 67, 65, 60);
  run(`{
    RS = 456; seen.fill(0); EV.length = 0; stats.ignitions = 0; brokenMachines = [];
    const ts = [-30, -0.5, 0, 0.5, 18, 97, 100, 260, 380, 600, 880, 1085, 1300, 1530, 1900];
    for (let i = 0; i < N; i++) {
      const m = (i * 37) % NMAT;
      mat[i] = m; temp[i] = ts[i % ts.length] + ((i % 3) - 1) * 0.001;
      life[i] = i % 256; flags[i] = i % 23 === 0 && FUEL[m] ? F_BURN : 0;
    }
    hot.fill(6); hot[0] = 0; hotLvl.fill(2); updateRoof();
  }`);
};
for (const scale of [1, 4]) {
  setup();
  run(`for (let c = 1; c < NCH; c++) referenceHeatChunk(c, ${scale});`);
  const expected = snapshot();
  setup();
  run(`for (let c = 1; c < NCH; c++) heatChunk(c, ${scale});`);
  check('heat matches original bytes and random state at scale ' + scale, snapshot() === expected);
}
setup();
run('const optimizedHeatChunk=heatChunk;heatChunk=referenceHeatChunk;heatPass();');
const passExpected=snapshot();
run('heatChunk=optimizedHeatChunk;');
setup();run('heatPass();');
check('four-pass heat matches the unoptimized oracle byte for byte',snapshot()===passExpected);
done();