const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('fs/promises');
const os = require('os');
const path = require('path');
const {
    LayaRequestError,
    LayaService,
    clearDirectoryContents,
    validateBatchPayload
} = require('../server/services/layaService');

test('status reports an unavailable runtime without throwing', async () => {
    const modelDir = await fs.mkdtemp(path.join(os.tmpdir(), 'nodecast-laya-status-'));
    const service = new LayaService({
        modelDir,
        cache: null,
        fetch: async () => { throw new Error('connection refused'); }
    });
    const status = await service.status();
    assert.equal(status.runtimeAvailable, false);
    assert.equal(status.modelPresent, false);
});

test('model deletion remains limited to the configured model directory', async () => {
    const parent = await fs.mkdtemp(path.join(os.tmpdir(), 'nodecast-laya-delete-'));
    const modelDir = path.join(parent, 'models');
    const sentinel = path.join(parent, 'keep.txt');
    await fs.mkdir(path.join(modelDir, 'nested'), { recursive: true });
    await fs.writeFile(path.join(modelDir, 'nested', 'model.bin'), 'model');
    await fs.writeFile(sentinel, 'keep');

    await clearDirectoryContents(modelDir);

    assert.deepEqual(await fs.readdir(modelDir), []);
    assert.equal(await fs.readFile(sentinel, 'utf8'), 'keep');
});

test('batch validation rejects oversized item counts', () => {
    assert.throws(
        () => validateBatchPayload({ items: Array.from({ length: 65 }, (_, id) => ({ id, text: 'channel' })) }),
        error => error instanceof LayaRequestError && error.statusCode === 413
    );
});