import assert from "node:assert/strict";
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(), "stl-export-unit-"));
const sourcePath = path.join(root, "web/protocol/stl-export.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, "stl-export.mjs");
fs.writeFileSync(modulePath, transpiled.outputText);
const protocol = await import(pathToFileURL(modulePath));
const document = {
  schemaVersion: 1,
  variant: "STL_BINARY",
  unitScale: 1,
  declaredTriangleCount: 1,
  triangleCount: 1,
  removedDegenerateTriangles: 0,
  normals: [[0, 1, 0]],
  vertices: [[[-1, 0, 1], [1, 0, 1], [1, 0, -1]]],
  bounds: { min: [-1, 0, -1], max: [1, 0, 1] },
};

test("M12-07F serializes binary STL and reports material loss", () => {
  const output = protocol.exportBinarySTL(document);
  assert.equal(output.byteLength, 134);
  assert.equal(new DataView(output).getUint32(80, true), 1);
  assert.deepEqual(protocol.createSTLLossReport(2), {
    schemaVersion: 1,
    operation: "STL_EXPORT_LOSS_REPORT",
    canRoundTrip: true,
    warningCount: 1,
    warnings: [{ code: "STL_MATERIAL_UNSUPPORTED", severity: "warning", message: "STL has no material slots; 2 source material assignments are omitted" }],
  });
});

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