/*
 * Extra tests for arc-dat-fast.
 *
 * Copyright (C) 2010-2021 Adam Nielsen <malvineous@shikadi.net>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import assert from 'assert';
import TestUtil from './util.js';
import { arc_dat_fast as handler, Archive, File } from '../index.js';

const md = handler.metadata();
let testutil = new TestUtil(md.id);

describe(`Extra tests for ${md.title} [${md.id}]`, function() {
	let content = {};

	describe('I/O', function() {

		before('load test data from local filesystem', function() {
			content = testutil.loadContent(handler, [
				'fat_trunc',
				'bad_filename',
				'file_past_eof',
				'typecode',
				'rle',
			]);
		});

		describe('identify()', function() {

			it('should reject files with truncated FAT entries', function() {
				const result = handler.identify(
					content['fat_trunc'].main,
					content['fat_trunc'].main.filename
				);
				assert.equal(result.reason, 'Incomplete FAT entry (36 bytes is less than the required 37).');
				assert.equal(result.valid, false);
			});

			it('should reject invalid chars in filename', function() {
				const result = handler.identify(
					content['bad_filename'].main,
					content['bad_filename'].main.filename
				);
				// Note that the file contains byte 0xFF but this gets translated into
				// UTF-8, so it comes out as \uA0 (non-breaking space).
				assert.equal(result.reason, `File 1 contains invalid (UTF-8) char 0xa0.`);
				assert.equal(result.valid, false);
			});

			it('should reject file past archive EOF', function() {
				const result = handler.identify(
					content['file_past_eof'].main,
					content['file_past_eof'].main.filename
				);
				assert.equal(result.reason, 'File 3 would go past EOF.');
				assert.equal(result.valid, false);
			});

		}); // identify()

		describe('parse()', function() {

			it('type codes are converted into filenames', function() {
				let archive = handler.parse(content.typecode);
				assert.equal(archive.files[0].name.toLowerCase(), 'level1.mif');
				assert.equal(archive.files[1].name.toLowerCase(), 'level2.mif');
				assert.equal(archive.files[2].name.toLowerCase(), 'test.tbg');
				assert.equal(archive.files[3].name.toLowerCase(), 'audio.snd');
				assert.equal(archive.files[4].name.toLowerCase(), 'ega.pal');
			});

			it('RLE codes are parsed', function() {
				let archive = handler.parse(content.rle);
				const exp = [0x12, 0x90, 0x34, 0xFE, 0xFE, 0xFE, 0xFE, 0x56];
				TestUtil.buffersEqual(Uint8Array.from(exp), archive.files[0].getContent());
			});

		}); // parse()

		describe('generate()', function() {

			it('filenames are converted into type codes', async function() {
				let archive = new Archive();

				let file = new File();
				file.name = 'level1.mif';
				file.nativeSize = 8;
				file.attributes.compressed = true;
				file.getRaw = () => TestUtil.u8FromString('content1');
				archive.files.push(file);

				file = new File();
				file.name = 'LEVEL2.MIF';
				file.nativeSize = 8;
				file.attributes.compressed = true;
				file.getRaw = () => TestUtil.u8FromString('content2');
				archive.files.push(file);

				file = new File();
				file.name = 'test.tbg';
				file.nativeSize = 8;
				file.attributes.compressed = true;
				file.getRaw = () => TestUtil.u8FromString('content3');
				archive.files.push(file);

				file = new File();
				file.name = 'audio.snd';
				file.nativeSize = 8;
				file.attributes.compressed = true;
				file.getRaw = () => TestUtil.u8FromString('content4');
				archive.files.push(file);

				file = new File();
				file.name = 'ega.pal';
				file.nativeSize = 8;
				file.attributes.compressed = true;
				file.getRaw = () => TestUtil.u8FromString('content5');
				archive.files.push(file);

				const contentGenerated = handler.generate(archive);
				TestUtil.contentEqual(content.typecode, contentGenerated);
			});

			it('RLE codes are generated', function() {
				let archive = new Archive();

				let file = new File();
				file.name = 'data.rle';
				file.nativeSize = 8;
				file.attributes.compressed = true;
				file.getRaw = () => Uint8Array.from([0x12, 0x90, 0x34, 0xFE, 0xFE, 0xFE, 0xFE, 0x56]);
				archive.files.push(file);

				const contentGenerated = handler.generate(archive);
				TestUtil.contentEqual(content.rle, contentGenerated);
			});

		}); // generate()

	}); // I/O

}); // Extra tests