import assert from 'node:assert/strict';
import {createHash} from 'node:crypto';
import {mkdirSync, writeFileSync} from 'node:fs';
import {join} from 'node:path';
import {makeTurkFsFormatDisk} from '../turkfs-format-fixture.mjs';

const root = process.cwd();
const block = 512;
const disk = makeTurkFsFormatDisk();
assert.equal(disk.length, 2048 * block);
const rootEntry = 17 * block + 4 * 32;
const inode = 18 * block + 4 * 32;
assert.ok(disk.subarray(rootEntry, rootEntry + 32).every(byte => byte === 0));
assert.ok(disk.subarray(inode, inode + 32).every(byte => byte === 0));
assert.equal(disk[24 * block], 0);
disk.writeUInt32LE(5, 16 * block + 32);
disk[rootEntry] = 1;
disk[rootEntry + 1] = 3;
disk.writeUInt32LE(5, rootEntry + 4);
disk.write('ONE', rootEntry + 8, 'ascii');
disk.writeUInt32LE(5, inode);
disk.writeBigUInt64LE(1n, inode + 8);
disk.writeBigUInt64LE(24n, inode + 16);
disk[24 * block] = 0x42;
const sha256 = bytes => createHash('sha256').update(bytes).digest('hex');
const files = [
  {name: 'README', bytes: disk.subarray(0, 0)},
  {name: 'ONE', bytes: disk.subarray(24 * block, 24 * block + 1)},
  {name: 'TAIL', bytes: disk.subarray(22 * block, 22 * block + 513)},
].map(row => ({name: row.name, bytes: row.bytes.length,
  sha256: sha256(row.bytes)}));
const directory = join(root, 'userspace/tests/fixtures');
mkdirSync(directory, {recursive: true});
const image = join(directory, 'core-tools.raw');
const manifest = join(directory, 'core-tools.json');
writeFileSync(image, disk);
writeFileSync(manifest, JSON.stringify({schema: 'turkos-k1290-cat-fixture/v1',
  image: 'core-tools.raw', bytes: disk.length, sha256: sha256(disk),
  files, source: 'scripts/turkfs-format-fixture.mjs + one-byte ONE file at LBA 24'},
null, 2) + '\n');
console.log(JSON.stringify({image, manifest, sha256: sha256(disk), files}));