import assert from "node:assert/strict";
import { after, before, test } from "node:test";

import { createServer } from "vite";

let server;
let parseLidarLocalSurfaceCatalog;
let parseLidarLocalSurfaceFrame;
let parseLidarLocalSurfaceTimeline;
let fetchLidarLocalSurfaceTimeline;
let LidarLocalSurfaceContractError;

const modelId = `k1-local-surface-${"a".repeat(64)}`;
const sourcePackId = `e10-lidar-pack-${"b".repeat(64)}`;

function distribution(value) {
  return {
    sample_count: 10,
    minimum: value,
    mean: value,
    p50: value,
    p95: value,
    maximum: value,
  };
}

function policy(overrides = {}) {
  return {
    observed_surface_class: 1,
    observed_occupied_class: 2,
    below_surface_or_negative_outlier_class: 3,
    absence_of_points_means_free: false,
    unknown_is_traversable: false,
    persistent_reconstruction_mutated: false,
    dynamic_object_layer_available: false,
    ...overrides,
  };
}

function model(overrides = {}) {
  return {
    model_id: modelId,
    display_name: "RAVNOVES00 · динамическая локальная поверхность K1",
    session_id: "20260720T065719Z_viewer_live",
    source_pack_id: sourcePackId,
    status: "diagnostic-only",
    source: {
      representation: "legacy-e10-vendor-map-with-pose",
      immutable: true,
      passive_processing_only: true,
      firmware_or_device_commands_used: false,
      frame_count: 12,
      available_lidar_frames: 10,
      point_count: 100,
      timeline_start_seconds: 1,
      timeline_end_seconds: 2,
    },
    surface_model: {},
    occupancy_policy: policy(),
    metrics: {
      frames: {
        total: 12,
        source_available: 10,
        valid: 10,
        source_unavailable: 2,
        pose_stale: 0,
        insufficient_surface: 0,
        fit_failed: 0,
      },
      sensor_height_m: distribution(1.3),
      slope_deg: distribution(2),
      roughness_m: distribution(0.04),
      confidence: distribution(0.8),
      pose_binding_age_ms: distribution(7),
      surface_max_age_ms: distribution(1000),
      temporal_qualification: {
        prediction: {
          current_frame_excluded: true,
          sample_count: 9,
          residual_p50_m: distribution(0.04),
          residual_p95_m: distribution(0.2),
          inlier_fraction: distribution(0.95),
        },
        stability: {
          sample_count: 9,
          height_delta_m: distribution(0.01),
          slope_delta_deg: distribution(0.1),
          roughness_delta_m: distribution(0.002),
          jump_count: 1,
        },
        step_candidates: {
          is_ground_truth: false,
          frames_with_candidates: 8,
          cell_count: distribution(20),
          point_count: distribution(12),
        },
      },
      build_elapsed_ms: 20,
    },
    anchors: [{
      key: "long-street",
      label: "Длинная улица",
      frame_index: 2,
      source_frame_index: 1350,
      session_seconds: 1.5,
      valid: true,
    }],
    decision: {
      status: "replay-experiment-only",
      production_promotion: false,
      next_gate: "shadow",
    },
    created_at_utc: "2026-07-25T00:00:00Z",
    ground_truth: false,
    authority: {
      commands_enabled: false,
      navigation_or_safety_accepted: false,
    },
    ...overrides,
  };
}

function catalog(overrides = {}) {
  return {
    schema_version: "missioncore.k1-local-surface-catalog/v1",
    configured: true,
    items: [model()],
    valid_total: 1,
    invalid_total: 0,
    access: "read-only",
    ...overrides,
  };
}

function frame(overrides = {}) {
  return {
    schema_version: "missioncore.k1-local-surface-frame/v1",
    model_id: modelId,
    source_pack_id: sourcePackId,
    session_id: "20260720T065719Z_viewer_live",
    frame_index: 2,
    frame_count: 12,
    source_frame_index: 1350,
    session_seconds: 1.5,
    source_available: true,
    valid: true,
    failure_code: 0,
    point_count: 4,
    coordinate_frame: "map",
    distance_unit: "m",
    points_xyz_m: [[0, 0, 0], [1, 0, 0], [1, 1, 0.7], [2, 0, -0.3]],
    point_class: [1, 1, 2, 3],
    point_height_m: [0, 0.02, 0.7, -0.3],
    point_step_candidate: [0, 1, 0, 0],
    pose: {
      position_xyz_m: [0, 0, 1.3],
      orientation_xyzw: [0, 0, 0, 1],
      binding_age_ms: 7,
    },
    surface: {
      plane_coefficients_map: [0, 0, 1, 0],
      sensor_height_m: 1.3,
      slope_deg: 0,
      roughness_m: 0.02,
      confidence: 0.8,
      surface_max_age_ms: 1000,
      cell_count: 40,
      inlier_cell_count: 35,
    },
    counts: {
      classified: 4,
      surface: 2,
      occupied: 1,
      below_surface: 1,
      step_candidate: 1,
    },
    prediction: {
      available: true,
      current_frame_excluded: true,
      cell_count: 32,
      residual_p50_m: 0.04,
      residual_p95_m: 0.2,
      inlier_fraction: 0.95,
    },
    temporal: {
      compared: true,
      height_delta_m: 0.01,
      slope_delta_deg: 0.1,
      roughness_delta_m: 0.002,
      jump: false,
      step_candidate_cell_count: 5,
    },
    classes: {},
    occupancy_policy: policy(),
    ground_truth: false,
    access: "read-only",
    authority: {
      commands_enabled: false,
      navigation_or_safety_accepted: false,
    },
    ...overrides,
  };
}

function timeline(overrides = {}) {
  return {
    schema_version: "missioncore.k1-local-surface-timeline/v1",
    model_id: modelId,
    source_pack_id: sourcePackId,
    session_id: "20260720T065719Z_viewer_live",
    frame_count: 4,
    source_frame_index: [1000, 1001, 1002, 1003],
    session_seconds: [0, 0.1, 0.2, 0.3],
    source_available: [1, 1, 1, 1],
    valid: [1, 1, 1, 1],
    prediction_available: [0, 1, 1, 1],
    prediction_residual_p50_m: [0, 0.04, 0.05, 0.03],
    prediction_residual_p95_m: [0, 0.2, 0.3, 0.15],
    prediction_inlier_fraction: [0, 0.95, 0.92, 0.97],
    sensor_height_m: [1.3, 1.31, 1.3, 1.29],
    slope_deg: [1, 1.1, 1.2, 1],
    roughness_m: [0.04, 0.04, 0.05, 0.04],
    confidence: [0.8, 0.8, 0.75, 0.82],
    temporal_compared: [0, 1, 1, 1],
    height_delta_m: [0, 0.01, 0.01, 0.01],
    slope_delta_deg: [0, 0.1, 0.1, 0.2],
    roughness_delta_m: [0, 0, 0.01, 0.01],
    temporal_jump: [0, 0, 1, 0],
    step_candidate_point_count: [1, 2, 3, 4],
    ground_truth: false,
    access: "read-only",
    authority: {
      commands_enabled: false,
      navigation_or_safety_accepted: false,
    },
    ...overrides,
  };
}

before(async () => {
  server = await createServer({
    appType: "custom",
    logLevel: "silent",
    server: { middlewareMode: true },
  });
  ({
    parseLidarLocalSurfaceCatalog,
    parseLidarLocalSurfaceFrame,
    parseLidarLocalSurfaceTimeline,
    fetchLidarLocalSurfaceTimeline,
    LidarLocalSurfaceContractError,
  } = await server.ssrLoadModule("/src/core/lidar/localSurface.ts"));
});

after(async () => {
  await server?.close();
});

test("decodes passive local-surface evidence", () => {
  const decoded = parseLidarLocalSurfaceCatalog(catalog());
  assert.equal(decoded.items[0].source.passiveProcessingOnly, true);
  assert.equal(decoded.items[0].metrics.sensorHeightM.p50, 1.3);
  assert.equal(decoded.items[0].anchors[0].sourceFrameIndex, 1350);
  assert.equal(
    decoded.items[0].metrics.temporalQualification.prediction.sampleCount,
    9,
  );

  const decodedFrame = parseLidarLocalSurfaceFrame(frame());
  assert.equal(decodedFrame.counts.occupied, 1);
  assert.equal(decodedFrame.counts.stepCandidate, 1);
  assert.equal(decodedFrame.prediction.currentFrameExcluded, true);
  assert.equal(decodedFrame.surface.sensorHeightM, 1.3);

  const decodedTimeline = parseLidarLocalSurfaceTimeline(timeline());
  assert.equal(decodedTimeline.frameCount, 4);
  assert.deepEqual(decodedTimeline.temporalJump, [0, 0, 1, 0]);
  assert.equal(decodedTimeline.predictionResidualP50M[2], 0.05);
});

test("rejects inferred free space", () => {
  assert.throws(
    () => parseLidarLocalSurfaceCatalog(catalog({
      items: [model({
        occupancy_policy: policy({ absence_of_points_means_free: true }),
      })],
    })),
    LidarLocalSurfaceContractError,
  );
});

test("rejects command authority", () => {
  assert.throws(
    () => parseLidarLocalSurfaceFrame(frame({
      authority: {
        commands_enabled: true,
        navigation_or_safety_accepted: false,
      },
    })),
    LidarLocalSurfaceContractError,
  );
});

test("fetches the complete local-surface timeline read-only", async () => {
  const requests = [];
  const decoded = await fetchLidarLocalSurfaceTimeline(modelId, {
    fetcher: async (input, init) => {
      requests.push({ input: String(input), method: init?.method });
      return new Response(JSON.stringify(timeline()), {
        status: 200,
        headers: { "Content-Type": "application/json" },
      });
    },
  });
  assert.deepEqual(requests, [{
    input: `/api/v1/lidar/local-surfaces/${modelId}/timeline`,
    method: "GET",
  }]);
  assert.equal(decoded.frameCount, 4);
});