const { test } = require('node:test');
const assert = require('node:assert');
const path = require('node:path');
const fs = require('node:fs');
const os = require('node:os');
const { bake } = require('../src/bake');

test('bake-deleted: missing source moves ID to deleted[]', async () => {
    const srcDir = fs.mkdtempSync(path.join(os.tmpdir(), 'atlas-src-'));
    const outDir = fs.mkdtempSync(path.join(os.tmpdir(), 'atlas-out-'));
    try {
        // Copy only grass + stone from fixture (omit water)
        const FIX = path.resolve(__dirname, 'fixtures/small-fresh');
        fs.copyFileSync(path.join(FIX, 'grass_diffuse.png'), path.join(srcDir, 'grass_diffuse.png'));
        fs.copyFileSync(path.join(FIX, 'stone_diffuse.png'), path.join(srcDir, 'stone_diffuse.png'));

        // Pre-existing lock has all 3 names
        fs.writeFileSync(
            path.join(outDir, 'tiles.atlas.lock.json'),
            JSON.stringify({
                atlas_id: 'small_demo',
                bindings: { grass: 1, stone: 2, water: 3 },
                deleted: [],
                next_id: 4,
            }, null, 2),
        );

        await bake({ inDir: srcDir, outDir, atlasId: 'small_demo', tileSize: 32 });

        const lock = JSON.parse(fs.readFileSync(path.join(outDir, 'tiles.atlas.lock.json'), 'utf8'));
        assert.strictEqual(lock.bindings.water, undefined);
        assert.deepStrictEqual(lock.deleted, [3]);
        assert.strictEqual(lock.next_id, 4);  // not advanced
    } finally {
        fs.rmSync(srcDir, { recursive: true, force: true });
        fs.rmSync(outDir, { recursive: true, force: true });
    }
});