const path = require('path');
const {test} = require('node:test');
const assert = require('node:assert');
const makeTestStorage = require('../fixtures/make-test-storage');
const readFileToBuffer = require('../fixtures/readProjectFile').readFileToBuffer;
const VirtualMachine = require('../../src/index');

const uri = path.resolve(__dirname, '../fixtures/unknown-opcode-in-c-block.sb2');
const project = readFileToBuffer(uri);

test('unknown opcode', async () => {
    const vm = new VirtualMachine();
    vm.attachStorage(makeTestStorage());

    vm.start();
    vm.clear();
    vm.setCompatibilityMode(false);
    vm.setTurboMode(false);
    await vm.loadProject(project);
    vm.greenFlag();

    // The project has 3 blocks in a single stack:
    //      when green flag => forever [ => "undefined"]
    // the "undefined" block has opcode "foo" and was created by dragging
    // a custom procedure caller named foo from the backpack into a project.
    // It should be parsed in without error and it should
    // leave the forever block empty.
    const blocks = vm.runtime.targets[1].blocks;
    const topBlockId = blocks.getScripts()[0];
    const secondBlockId = blocks.getNextBlock(topBlockId);
    const innerBlockId = blocks.getBranch(secondBlockId, 0);

    assert.strictEqual(blocks.getBlock(topBlockId).opcode, 'event_whenflagclicked');
    assert.strictEqual(blocks.getBlock(secondBlockId).opcode, 'control_forever');
    assert.strictEqual(innerBlockId, null);

    vm.quit();
});