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

test("exec-lua runs code 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 text = await callExecLua(bridge.mcpUrl, 0, "print('hello from exec'); return 2 + 3");
    assert.match(text, /^computer: 0 \(Label: null\)\nok: true\nreturns: \[\{.*\}\]\noutput:\nhello from exec$/);
    assert.match(text, /"type":"number"/);
    assert.match(text, /"value":5/);

    const runtimeError = await callExecLua(bridge.mcpUrl, 0, "print('before runtime error'); error('boom', 0)");
    assert.equal(runtimeError, "computer: 0 (Label: null)\nok: false\nerror: boom\noutput:\nbefore runtime error");

    const syntaxError = await callExecLua(bridge.mcpUrl, 0, "print('unterminated'\nreturn 1");
    assert.match(syntaxError, /^computer: 0 \(Label: null\)\nok: false\nerror: .+\noutput:$/);
    assert.match(syntaxError, /near|expected|unexpected/);

    const visibleWrite = await callExecLua(bridge.mcpUrl, 0, "term.clear(); term.setCursorPos(1, 1); term.write('visible'); return 'done'");
    assert.match(visibleWrite, /^computer: 0 \(Label: null\)\nok: true\nreturns: \[\{.*\}\]\noutput:$/);
    assert.match(visibleWrite, /"type":"string"/);
    assert.match(visibleWrite, /"value":"done"/);
  } 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();
  }
});