'use strict';

const test = require('node:test');
const assert = require('node:assert/strict');
const { run } = require('../src/cli');

class Sink {
  constructor() { this.chunks = []; }
  write(s) { this.chunks.push(s); }
  get text() { return this.chunks.join(''); }
}

test('decode: 196 prints (0,12,1)', () => {
  const out = new Sink(); const err = new Sink();
  const code = run(['decode', '196'], { out, err });
  assert.equal(code, 0);
  assert.equal(out.text, 'atlas=0 tile=12 rotation=1\n');
});

test('decode: 0 prints "empty"', () => {
  const out = new Sink(); const err = new Sink();
  const code = run(['decode', '0'], { out, err });
  assert.equal(code, 0);
  assert.equal(out.text, 'empty\n');
});

test('decode: hex (0xc4) parses to 196', () => {
  const out = new Sink(); const err = new Sink();
  const code = run(['decode', '0xc4'], { out, err });
  assert.equal(code, 0);
  assert.equal(out.text, 'atlas=0 tile=12 rotation=1\n');
});

test('decode: non-zero with tile=0 prints components (not "empty")', () => {
  // gid=4 = (0<<24) | (0<<4) | (1<<2) → atlas=0 tile=0 rot=1
  const out = new Sink(); const err = new Sink();
  const code = run(['decode', '4'], { out, err });
  assert.equal(code, 0);
  assert.equal(out.text, 'atlas=0 tile=0 rotation=1\n');
});

test('decode: 16777232 from demo_v2 wall layer → (1,1,0)', () => {
  const out = new Sink(); const err = new Sink();
  const code = run(['decode', '16777232'], { out, err });
  assert.equal(code, 0);
  assert.equal(out.text, 'atlas=1 tile=1 rotation=0\n');
});

test('decode: no args prints usage, exit 1', () => {
  const out = new Sink(); const err = new Sink();
  const code = run(['decode'], { out, err });
  assert.equal(code, 1);
  assert.match(err.text, /usage: sporel-mapper decode/);
});

test('decode: bogus arg prints error, exit 1', () => {
  const out = new Sink(); const err = new Sink();
  const code = run(['decode', 'xyz'], { out, err });
  assert.equal(code, 1);
  assert.match(err.text, /error/i);
});