import { readFileSync } from "node:fs";
import { fileURLToPath } from "node:url";
import { dirname, resolve } from "node:path";
import assert from "node:assert/strict";

import createLinuxCncIniModule from "../../../runtime/ui/ini-panel/linuxcnc_ini.js";

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
const rootDir = resolve(__dirname, "../../..");
const wasmPath = resolve(rootDir, "runtime/ui/ini-panel/linuxcnc_ini.wasm");

const mod = await createLinuxCncIniModule({
  wasmBinary: readFileSync(wasmPath),
  print() {},
  printErr(message) {
    console.error(message);
  },
});

function allocCString(value) {
  const bytes = mod.lengthBytesUTF8(value) + 1;
  const ptr = mod._malloc(bytes);
  mod.stringToUTF8(value, ptr, bytes);
  return ptr;
}

function queryIni(path, section, tag) {
  const pathPtr = allocCString(path);
  const sectionPtr = allocCString(section);
  const tagPtr = allocCString(tag);
  const outSize = 256;
  const outPtr = mod._malloc(outSize);

  try {
    const rc = mod._lcini_get_string(pathPtr, sectionPtr, tagPtr, outPtr, outSize);
    return { rc, value: rc === 0 ? mod.UTF8ToString(outPtr) : null };
  } finally {
    mod._free(pathPtr);
    mod._free(sectionPtr);
    mod._free(tagPtr);
    mod._free(outPtr);
  }
}

mod.FS.mkdir("/work");
mod.FS.writeFile(
  "/work/node-smoke.ini",
  `[EMC]
MACHINE = wasm-node-smoke

[TRAJ]
LINEAR_UNITS = mm
COORDINATES = X Y Z A B

[KINS]
KINEMATICS = xyzbc-trt-kins
JOINTS = 5
`,
  { encoding: "utf8" },
);

assert.deepEqual(queryIni("/work/node-smoke.ini", "EMC", "MACHINE"), {
  rc: 0,
  value: "wasm-node-smoke",
});
assert.deepEqual(queryIni("/work/node-smoke.ini", "TRAJ", "LINEAR_UNITS"), {
  rc: 0,
  value: "mm",
});
assert.deepEqual(queryIni("/work/node-smoke.ini", "KINS", "KINEMATICS"), {
  rc: 0,
  value: "xyzbc-trt-kins",
});
assert.notEqual(queryIni("/work/node-smoke.ini", "TRAJ", "MISSING").rc, 0);

console.log("ini_wasm_node_smoke=ok");