import assert from "node:assert/strict";
import crypto from "node:crypto";
import fs from "node:fs";
import os from "node:os";
import path from "node:path";
import { pathToFileURL } from "node:url";
import test from "node:test";
import ts from "typescript";

const root = path.resolve(import.meta.dirname, "../../..");
const temporary = fs.mkdtempSync(path.join(os.tmpdir(), "glb-desktop-import-unit-"));
const sourcePath = path.join(root, "web/protocol/glb-import.ts");
const transpiled = ts.transpileModule(fs.readFileSync(sourcePath, "utf8"), {
  compilerOptions: { module: ts.ModuleKind.ES2022, target: ts.ScriptTarget.ES2022 },
  fileName: sourcePath,
  reportDiagnostics: true,
});
assert.deepEqual(transpiled.diagnostics, []);
const modulePath = path.join(temporary, "glb-import.mjs");
fs.writeFileSync(modulePath, transpiled.outputText);
const protocol = await import(pathToFileURL(modulePath));
const report = JSON.parse(fs.readFileSync(path.join(root, "tests/golden/M12-06A/desktop-fixtures.json"), "utf8"));
const fixtureRoot = path.join(root, "tests/files/web/m12_glb_desktop_v1");
const arrayBuffer = (bytes) => bytes.buffer.slice(bytes.byteOffset, bytes.byteOffset + bytes.byteLength);

test("M12-06B imports every desktop fixture with exact Web semantics", () => {
  assert.deepEqual(report.fixtures.map((fixture) => fixture.id), ["mesh", "pbr", "uv", "skin", "animation"]);
  for (const fixture of report.fixtures) {
    const bytes = fs.readFileSync(path.join(fixtureRoot, fixture.file));
    assert.equal(crypto.createHash("sha256").update(bytes).digest("hex"), fixture.sha256);
    const imported = protocol.importGLBDesktopFixtureSemantics(arrayBuffer(bytes));
    assert.deepEqual(protocol.compareGLBDesktopFixtureSemantics(fixture.semantic, imported), { compatible: true, mismatches: [] }, fixture.id);
  }
});

test("M12-06B exposes topology, attributes, materials, nodes and animations separately", () => {
  const imported = Object.fromEntries(report.fixtures.map((fixture) => {
    const bytes = fs.readFileSync(path.join(fixtureRoot, fixture.file));
    return [fixture.id, protocol.importGLBDesktopFixtureSemantics(arrayBuffer(bytes))];
  }));
  assert.deepEqual(Object.keys(imported.mesh.meshes[0].primitives[0].attributes), ["COLOR_0", "NORMAL", "POSITION"]);
  assert.equal(imported.mesh.meshes[0].primitives[0].indices.count, 6);
  assert.equal(Number(imported.pbr.materials[0].pbr.metallicFactor.toFixed(3)), 0.72);
  assert.ok(imported.uv.meshes[0].primitives[0].attributes.TEXCOORD_0);
  assert.equal(imported.uv.materials[0].pbr.baseColorTexture.index, 0);
  assert.deepEqual(imported.skin.nodeNames, ["Tip", "Root", "M12 Skin Fixture", "M12 Skin Armature"]);
  assert.equal(imported.skin.skins[0].inverseBindMatrices.type, "MAT4");
  assert.deepEqual(imported.animation.animations[0].channels.map((channel) => channel.target.path), ["translation", "rotation"]);
  assert.equal(imported.animation.animations[0].samplers[0].input.count, 25);
});

test("M12-06B reports a field-level semantic mismatch", () => {
  const fixture = report.fixtures.find((candidate) => candidate.id === "pbr");
  const bytes = fs.readFileSync(path.join(fixtureRoot, fixture.file));
  const imported = protocol.importGLBDesktopFixtureSemantics(arrayBuffer(bytes));
  const expected = structuredClone(fixture.semantic);
  expected.materials[0].pbr.metallicFactor = 0.5;
  const comparison = protocol.compareGLBDesktopFixtureSemantics(expected, imported);
  assert.equal(comparison.compatible, false);
  assert.deepEqual(comparison.mismatches, ["$.materials[0].pbr.metallicFactor: expected 0.5 got 0.7200000286102295"]);
});

test.after(() => fs.rmSync(temporary, { recursive: true, force: true }));