import { computeDasMap } from "/packages/acoustics-core/das.js";
import {
  createLocalizationPlan,
  createStreamingLocalizer,
  localizeMultichannel,
} from "/packages/acoustics-core/realtime-localizer.js";
import { distance3 } from "/packages/acoustics-core/math.js";

function createFixture(sampleCount = 320) {
  const sampleRate = 4096;
  const speedOfSound = 343;
  const frequency = 512;
  const target = [0.1, -0.1, 1];
  const array = {
    id: "portable-array",
    microphones: [
      {
        id: "nw",
        position: [-0.12, 0.12, 0],
        sensitivityDb: 1.5,
        phaseOffsetDeg: -4,
        frequencyResponse: [
          { frequencyHz: 400, gainDb: -1, phaseDeg: -3 },
          { frequencyHz: 600, gainDb: 2, phaseDeg: 5 },
        ],
      },
      { id: "ne", position: [0.12, 0.12, 0], sensitivityDb: -0.5, phaseOffsetDeg: 2 },
      { id: "sw", position: [-0.12, -0.12, 0] },
      { id: "se", position: [0.12, -0.12, 0] },
    ],
  };
  const channels = array.microphones.map((microphone) => {
    const delay = distance3(target, microphone.position) / speedOfSound;
    return Float32Array.from(
      { length: sampleCount },
      (_, sampleIndex) =>
        Math.sin(2 * Math.PI * frequency * (sampleIndex / sampleRate - delay)),
    );
  });
  const scan = {
    z: 1,
    xMin: -0.2,
    xMax: 0.2,
    yMin: -0.1,
    yMax: 0.1,
    columns: 5,
    rows: 3,
  };
  const bands = [{ id: "tone", minHz: 500, maxHz: 524, color: "#65f2bf" }];
  const config = {
    sampleRate,
    array,
    scan,
    bands,
    speedOfSound,
    stft: { fftSize: 64, hopSize: 32 },
    normalization: "peak",
    maximumSteeringCacheBytes: 1024 * 1024,
    computeOptions: {
      pointBatchSize: 1024,
      stftTransformBatchSize: 1024,
    },
  };
  return { sampleRate, speedOfSound, target, array, channels, scan, bands, config };
}

function assertFloat32Exact(actual, expected, label) {
  assertEqual(actual.length, expected.length, `${label} length`);
  for (let index = 0; index < actual.length; index += 1) {
    assertEqual(actual[index], expected[index], `${label}[${index}]`);
  }
}

function sliceChannels(channels, start, end) {
  return channels.map((channel) => channel.slice(start, end));
}

test("portable localizer가 Scene 합성 없이 기존 CPU DAS와 bit-exact map을 만든다", async () => {
  const fixture = createFixture(128);
  const experiment = {
    stft: { fftSize: 64, hopSize: 32, window: "hann" },
    scan: fixture.scan,
    frequencyBands: fixture.bands,
    beamforming: { normalization: "peak", compensateFrequencyResponse: true },
  };
  const baseline = await computeDasMap({
    channels: fixture.channels,
    sampleRate: fixture.sampleRate,
    arrayDefinition: fixture.array,
    scene: { speedOfSound: fixture.speedOfSound },
    experiment,
    pointBatchSize: 1024,
    stftTransformBatchSize: 1024,
  });
  const plan = createLocalizationPlan(fixture.config);
  const portable = await localizeMultichannel({
    plan,
    channels: fixture.channels,
  });

  assertFloat32Exact(portable.bands[0].rawMap, baseline.bands[0].rawMap, "raw map");
  assertFloat32Exact(portable.bands[0].displayMap, baseline.bands[0].displayMap, "display map");
  assertEqual(portable.bands[0].peak.index, baseline.bands[0].peak.index, "peak index");
  assertEqual(portable.locations[0].bandId, "tone", "portable location band");
  assertEqual(portable.sampleCount, 128, "sample count");
  assertEqual(portable.duration, 128 / fixture.sampleRate, "block duration");
});

test("CPU 분석 계획이 반복 geometry·steering 연산과 bin map 할당을 실제로 제거한다", async () => {
  const fixture = createFixture(128);
  const plan = createLocalizationPlan(fixture.config);
  const first = await localizeMultichannel({ plan, channels: fixture.channels });
  const second = await localizeMultichannel({ plan, channels: fixture.channels });
  const cache = second.analysisCache;
  const pointMicrophonePairs = fixture.scan.columns * fixture.scan.rows * fixture.array.microphones.length;

  assertEqual(cache.analysisAttempts, 2, "analysis attempts");
  assertEqual(cache.completedAnalyses, 2, "completed analyses");
  assertEqual(cache.distanceMatrixBuilds, 1, "one retained distance matrix");
  assertEqual(cache.distanceEvaluations, pointMicrophonePairs, "distance evaluations performed");
  assertEqual(
    cache.avoidedDistanceEvaluations,
    pointMicrophonePairs,
    "second distance pass avoided",
  );
  assert(cache.steeringCacheEnabled, "bounded steering cache enabled");
  assertEqual(cache.steeringMatrixBuilds, 1, "one steering matrix build");
  assertEqual(cache.steeringCacheHits, 1, "second steering pass is a cache hit");
  assertEqual(
    cache.avoidedSteeringPointMicrophonePairs,
    pointMicrophonePairs,
    "second trigonometric steering pass avoided",
  );
  assertEqual(cache.avoidedBinMapAllocations, 1, "second temporary bin map allocation avoided");
  assert(cache.retainedBytes > 0, "retained cache bytes are reported");
  assertFloat32Exact(second.bands[0].rawMap, first.bands[0].rawMap, "cached repeat raw map");
});

test("streaming localizer 결과가 임의 chunk 경계와 무관하다", async () => {
  const fixture = createFixture(320);
  const streamConfig = {
    ...fixture.config,
    analysisWindowSamples: 128,
    analysisHopSamples: 64,
    maximumBufferedSamples: 512,
    maximumResultsPerCall: 4,
  };
  const whole = createStreamingLocalizer(streamConfig);
  whole.append(fixture.channels);
  const wholeResults = await whole.analyzeAvailable({ maximumResults: 4 });

  const chunked = createStreamingLocalizer(streamConfig);
  const chunkSizes = [17, 83, 1, 91, 128];
  const chunkedResults = [];
  let offset = 0;
  for (const chunkSize of chunkSizes) {
    const end = offset + chunkSize;
    chunkedResults.push(...await chunked.push(sliceChannels(fixture.channels, offset, end)));
    offset = end;
  }

  assertEqual(wholeResults.length, 4, "whole block window count");
  assertEqual(chunkedResults.length, wholeResults.length, "chunked window count");
  wholeResults.forEach((expected, index) => {
    const actual = chunkedResults[index];
    assertEqual(actual.startSample, index * 64, `chunked start sample ${index}`);
    assertEqual(actual.endSample, index * 64 + 128, `chunked end sample ${index}`);
    assertEqual(actual.sequence, index, `chunked sequence ${index}`);
    assertFloat32Exact(actual.bands[0].rawMap, expected.bands[0].rawMap, `chunked map ${index}`);
  });
  assertEqual(chunked.getState().droppedSamples, 0, "no samples dropped under capacity");
});

test("streaming ring buffer와 호출별 결과 수가 설정된 상한을 지킨다", async () => {
  const fixture = createFixture(400);
  let planLimitError;
  try {
    createLocalizationPlan({ ...fixture.config, maximumPlanBytes: 64 });
  } catch (error) {
    planLimitError = error;
  }
  assert(
    planLimitError instanceof RangeError &&
      planLimitError.message.includes("maximumPlanBytes"),
    "analysis plan allocation hard limit",
  );
  const invalidResponseConfig = structuredClone(fixture.config);
  invalidResponseConfig.array.microphones[0].frequencyResponse = [
    { frequencyHz: 1000, gainDb: 0 },
    { frequencyHz: 1000, gainDb: -3 },
  ];
  let responseError;
  try {
    createLocalizationPlan(invalidResponseConfig);
  } catch (error) {
    responseError = error;
  }
  assert(
    responseError instanceof RangeError && responseError.message.includes("strictly increasing"),
    "portable microphone response validation",
  );
  let inputLimitError;
  try {
    createStreamingLocalizer({
      ...fixture.config,
      analysisWindowSamples: 128,
      maximumBufferedSamples: 128,
      maximumInputBufferBytes: 1024,
    });
  } catch (error) {
    inputLimitError = error;
  }
  assert(
    inputLimitError instanceof RangeError &&
      inputLimitError.message.includes("maximumInputBufferBytes"),
    "input allocation hard limit",
  );
  const bounded = createStreamingLocalizer({
    ...fixture.config,
    analysisWindowSamples: 128,
    analysisHopSamples: 64,
    maximumBufferedSamples: 128,
    maximumResultsPerCall: 1,
  });
  const appended = bounded.append(fixture.channels);
  assertEqual(appended.bufferedSamples, 128, "ring capacity");
  assertEqual(appended.droppedSamples, 272, "oldest samples dropped");
  assertEqual(appended.bufferStartSample, 272, "retained absolute sample origin");
  assertEqual(
    appended.retainedInputBytes,
    fixture.array.microphones.length * (128 + 128) * Float32Array.BYTES_PER_ELEMENT,
    "fixed ring and analysis workspace bytes",
  );
  const boundedResults = await bounded.analyzeAvailable();
  assertEqual(boundedResults.length, 1, "one bounded result");
  assertEqual(boundedResults[0].startSample, 272, "latest retained window analyzed");

  const resultBound = createStreamingLocalizer({
    ...fixture.config,
    analysisWindowSamples: 128,
    analysisHopSamples: 64,
    maximumBufferedSamples: 512,
    maximumResultsPerCall: 2,
  });
  resultBound.append(fixture.channels);
  const first = await resultBound.analyzeAvailable();
  const second = await resultBound.analyzeAvailable();
  assertEqual(first.length, 2, "first result batch bound");
  assertEqual(second.length, 2, "second result batch bound");
  assertEqual(resultBound.getState().availableAnalysisCount, 1, "remaining work stays buffered");
});

test("streaming 분석 취소가 AbortError를 전달하고 계획 lock을 해제한다", async () => {
  const fixture = createFixture(128);
  const stream = createStreamingLocalizer({
    ...fixture.config,
    analysisWindowSamples: 128,
    analysisHopSamples: 64,
    maximumBufferedSamples: 256,
    maximumResultsPerCall: 1,
  });
  stream.append(fixture.channels);
  const controller = new AbortController();
  let cancellationRequested = false;
  let caught;
  try {
    await stream.analyzeAvailable({
      signal: controller.signal,
      computeOptions: { stftTransformBatchSize: 1 },
      onProgress: ({ stage, completedTransforms }) => {
        if (stage === "stft" && completedTransforms > 0 && !cancellationRequested) {
          cancellationRequested = true;
          controller.abort();
        }
      },
    });
  } catch (error) {
    caught = error;
  }
  assert(cancellationRequested, "cancellation requested during STFT");
  assertEqual(caught?.name, "AbortError", "AbortError propagated");
  assertEqual(stream.getState().busy, false, "stream lock released");
  assertEqual(stream.plan.dasPlan.busy, false, "DAS plan lock released");
  assertEqual(stream.getState().failedAnalyses, 1, "failed analysis counted");
});