import assert from "node:assert/strict";
import test from "node:test";
import { callExecLua, callWriteFile, formatFailure, startBridge, startCraftos, waitForComputers } from "./harness.js";

test("write-file writes through the real TrapOS mcp-computer program", async () => {
  const bridge = await startBridge();
  const craftos = startCraftos("/programs/mcp-computer.lua", {
    mountRepo: true,
    shellArgs: [bridge.linkUrl],
    timeoutMs: 15_000,
  });
  try {
    await waitForComputers(bridge.registry, 1, 12_000);

    const first = await callWriteFile(bridge.mcpUrl, 0, "mcp-write-test.txt", "hello\nworld");
    assert.equal(first, "computer: 0 (Label: null)\nok: true\npath: mcp-write-test.txt\nbytes: 11");

    const readFirst = await callExecLua(
      bridge.mcpUrl,
      0,
      "local h = fs.open('mcp-write-test.txt', 'r'); local c = h.readAll(); h.close(); return c",
    );
    assert.match(readFirst, /"value":"hello\\nworld"/);

    const second = await callWriteFile(bridge.mcpUrl, 0, "mcp-write-test.txt", "overwritten");
    assert.equal(second, "computer: 0 (Label: null)\nok: true\npath: mcp-write-test.txt\nbytes: 11");

    const readSecond = await callExecLua(
      bridge.mcpUrl,
      0,
      "local h = fs.open('mcp-write-test.txt', 'r'); local c = h.readAll(); h.close(); fs.delete('mcp-write-test.txt'); return c",
    );
    assert.match(readSecond, /"value":"overwritten"/);
  } catch (error) {
    craftos.abort();
    const result = await craftos.done;
    throw new Error(formatFailure(error instanceof Error ? error.message : String(error), result.output), { cause: error });
  } finally {
    craftos.abort();
    await craftos.done;
    await bridge.close();
  }
});