import assert from "node:assert/strict";
import { readFile } from "node:fs/promises";
import test from "node:test";
import vm from "node:vm";
import { DEFAULT_GRID_LOD_PROFILES } from "../apps/catalog/src/mapGridPolicy.mjs";

const seed = JSON.parse(await readFile(new URL("../runtime-seed/page-layouts/map.json", import.meta.url), "utf8"));
const serverSource = await readFile(new URL("./catalog-server.mjs", import.meta.url), "utf8");
const mcpSource = await readFile(new URL("./foundry-mcp.mjs", import.meta.url), "utf8");
const extensionKeys = [
  "majorLinesEnabled",
  "majorLabelsEnabled",
  "majorLineWidthMultiplier",
  "volumeEnabled",
  "volumeMinimumHeightMeters",
  "volumeMaximumHeightMeters",
  "volumeBandHeightMeters",
  "selectionFillColor",
  "selectionFillOpacityPercent",
  "selectionOutlineColor",
  "selectionOutlineWidthPx",
  "selectionOutlineOpacityPercent",
];

function applicationError(code, statusCode = 400) {
  const error = new Error(code);
  error.statusCode = statusCode;
  return error;
}

const validators = {
  applicationError,
  isObject: (value) => Boolean(value) && typeof value === "object" && !Array.isArray(value),
  requireNumber(value, minimum, maximum, code) {
    if (typeof value !== "number" || !Number.isFinite(value) || value < minimum || value > maximum) {
      throw applicationError(code);
    }
    return value;
  },
  requireBoolean(value, code) {
    if (typeof value !== "boolean") throw applicationError(code);
    return value;
  },
  requireHex(value, code) {
    const normalized = String(value || "");
    if (!/^#[0-9a-f]{6}$/i.test(normalized)) throw applicationError(code);
    return normalized.toLowerCase();
  },
};

function loadServerGridContract() {
  const start = serverSource.indexOf("const GRID_LOD_PROFILE_KEYS");
  const end = serverSource.indexOf("function validateMapPageSettingsPatch");
  assert.ok(start >= 0 && end > start, "server grid contract source boundaries");
  const context = vm.createContext({ ...validators });
  const source = `${serverSource.slice(start, end)}\n;globalThis.gridContract = { DEFAULT_GRID_LOD_PROFILES, promoteLegacyGridLodProfiles, validateGridLodProfiles };`;
  new vm.Script(source, { filename: "catalog-server.grid-contract.mjs" }).runInContext(context);
  return context.gridContract;
}

const serverGrid = loadServerGridContract();

test("seed, client defaults and server promotion keep the sector-v2 profile contract identical", () => {
  assert.deepEqual(seed.settings.gridLodProfiles, DEFAULT_GRID_LOD_PROFILES);
  const legacyProfiles = seed.settings.gridLodProfiles.map((profile) => {
    const legacy = { ...profile };
    for (const key of extensionKeys) delete legacy[key];
    return legacy;
  });
  assert.deepEqual(
    structuredClone(serverGrid.validateGridLodProfiles(legacyProfiles)),
    DEFAULT_GRID_LOD_PROFILES,
  );
});

test("flat layouts migrate mode-aware extensions while explicit invalid hierarchy is rejected", () => {
  const flatSettings = {
    ...seed.settings,
    gridLodProfiles: undefined,
    gridLod1StepKm: 3,
    gridTileSizeKm: 10,
    gridLod2Mode: "graticule",
  };
  const migrated = structuredClone(serverGrid.validateGridLodProfiles(
    serverGrid.promoteLegacyGridLodProfiles(flatSettings),
  ));
  assert.equal(migrated[0].majorLinesEnabled, false);
  assert.equal(migrated[0].majorLabelsEnabled, false);
  assert.equal(migrated[1].mode, "graticule");
  assert.equal(migrated[1].volumeEnabled, false);

  const invalidExplicit = structuredClone(DEFAULT_GRID_LOD_PROFILES);
  invalidExplicit[0].stepKm = 3;
  invalidExplicit[0].tileSizeKm = 10;
  assert.throws(
    () => serverGrid.validateGridLodProfiles(invalidExplicit),
    /invalid_map_grid_lod_profile_1_tileSizeKm_step_ratio/,
  );
});

test("Foundry MCP exposes every persisted sector-v2 profile field", () => {
  for (const key of extensionKeys) assert.match(mcpSource, new RegExp(`\\b${key}: \\{`));
});

test("server persists selected-sector visuals and accepts a 1,000 m address band inside its range", () => {
  const profiles = structuredClone(DEFAULT_GRID_LOD_PROFILES);
  Object.assign(profiles[0], {
    volumeMaximumHeightMeters: 1_000,
    volumeBandHeightMeters: 1_000,
    selectionFillColor: "#A0B1C2",
    selectionFillOpacityPercent: 34,
    selectionOutlineColor: "#C3D4E5",
    selectionOutlineWidthPx: 7.5,
    selectionOutlineOpacityPercent: 81,
  });
  const validated = structuredClone(serverGrid.validateGridLodProfiles(profiles));
  assert.equal(validated[0].volumeBandHeightMeters, 1_000);
  assert.equal(validated[0].selectionFillColor, "#a0b1c2");
  assert.equal(validated[0].selectionFillOpacityPercent, 34);
  assert.equal(validated[0].selectionOutlineColor, "#c3d4e5");
  assert.equal(validated[0].selectionOutlineWidthPx, 7.5);
  assert.equal(validated[0].selectionOutlineOpacityPercent, 81);
});

test("server rejects selected-sector visual values outside the canonical bounds", () => {
  for (const [field, value] of [
    ["selectionFillColor", "cyan"],
    ["selectionFillOpacityPercent", 101],
    ["selectionOutlineColor", "#ffff"],
    ["selectionOutlineWidthPx", 12.01],
    ["selectionOutlineOpacityPercent", -1],
  ]) {
    const profiles = structuredClone(DEFAULT_GRID_LOD_PROFILES);
    profiles[0][field] = value;
    assert.throws(
      () => serverGrid.validateGridLodProfiles(profiles),
      new RegExp(`invalid_map_grid_lod_profile_1_${field}`),
    );
  }
});