import { test } from 'node:test';
import assert from 'node:assert/strict';
import { readFileSync, copyFileSync, mkdtempSync, readdirSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { fileURLToPath } from 'node:url';
import { dirname, join } from 'node:path';
import { TsConfigFile } from '../src/io/TsConfigFile';

const here = dirname(fileURLToPath(import.meta.url));
const fixture = join(here, 'fixtures', 'heroSet.sample.ts');

test('load + getKeys', () => {
  const f = new TsConfigFile(fixture, 'HeroInfo');
  f.load();
  assert.deepEqual(f.getKeys(), ['5011', '6001']);
});
test('read returns structured value with speed/enumRef preserved', () => {
  const f = new TsConfigFile(fixture, 'HeroInfo');
  f.load();
  const v = f.read('5011')!;
  assert.equal(v.kind, 'obj');
  assert.deepEqual(v.props['fac'], { kind: 'enumRef', qualifier: 'FacSet', member: 'HERO' });
  const skill = v.props['skills'].props['6001'];
  assert.deepEqual(skill.props['cd'], { kind: 'speed', level: 'Slow3' });
});
test('getText after load equals original file (no mutation on load)', () => {
  const f = new TsConfigFile(fixture, 'HeroInfo');
  f.load();
  assert.equal(f.getText(), readFileSync(fixture, 'utf8'));
});
test('read missing key returns null', () => {
  const f = new TsConfigFile(fixture, 'HeroInfo');
  f.load();
  assert.equal(f.read('9999'), null);
});

function withTempFixture(): { dir: string; file: string } {
  const dir = mkdtempSync(join(tmpdir(), 'phcfg-'));
  const file = join(dir, 'heroSet.sample.ts');
  copyFileSync(fixture, file);
  return { dir, file };
}

test('patch updates one entry; reload reads new value; other entries intact', () => {
  const { file } = withTempFixture();
  const f = new TsConfigFile(file, 'HeroInfo'); f.load();
  const v = f.read('5011')!;
  v.props['ap'] = { kind: 'num', value: 99 };
  f.patch('5011', v);
  assert.equal(f.isDirty(), true);
  assert.equal(f.save().ok, true);
  const f2 = new TsConfigFile(file, 'HeroInfo'); f2.load();
  assert.deepEqual(f2.read('5011')!.props['ap'], { kind: 'num', value: 99 });
  assert.equal(f2.read('6001')!.props['name'].value, '兽人战士'); // 另一条未破坏
});

test('patch preserves speed + enumRef on reload', () => {
  const { file } = withTempFixture();
  const f = new TsConfigFile(file, 'HeroInfo'); f.load();
  const v = f.read('5011')!;
  v.props['hp'] = { kind: 'num', value: 500 };
  f.patch('5011', v); f.save();
  const f2 = new TsConfigFile(file, 'HeroInfo'); f2.load();
  const again = f2.read('5011')!;
  assert.deepEqual(again.props['fac'], { kind: 'enumRef', qualifier: 'FacSet', member: 'HERO' });
  assert.deepEqual(again.props['skills'].props['6001'].props['cd'], { kind: 'speed', level: 'Slow3' });
});

test('add appends entry readable after save+reload', () => {
  const { file } = withTempFixture();
  const f = new TsConfigFile(file, 'HeroInfo'); f.load();
  f.add('5099', { kind: 'obj', props: { uuid: { kind: 'num', value: 5099 }, name: { kind: 'str', value: '新英雄' } } });
  f.save();
  const f2 = new TsConfigFile(file, 'HeroInfo'); f2.load();
  assert.ok(f2.getKeys().includes('5099'));
  assert.equal(f2.read('5099')!.props['name'].value, '新英雄');
});

test('delete removes entry', () => {
  const { file } = withTempFixture();
  const f = new TsConfigFile(file, 'HeroInfo'); f.load();
  f.delete('6001'); f.save();
  const f2 = new TsConfigFile(file, 'HeroInfo'); f2.load();
  assert.ok(!f2.getKeys().includes('6001'));
  assert.ok(f2.getKeys().includes('5011'));
});

test('save writes a .bak backup of the pre-save file', () => {
  const { file } = withTempFixture();
  const f = new TsConfigFile(file, 'HeroInfo'); f.load();
  const v = f.read('5011')!; v.props['hp'] = { kind: 'num', value: 1 }; f.patch('5011', v);
  f.save();
  assert.equal(readFileSync(file + '.bak', 'utf8'), readFileSync(fixture, 'utf8'));
});

test('save with no edits is a no-op (ok, no .bak written)', () => {
  const { file, dir } = withTempFixture();
  const f = new TsConfigFile(file, 'HeroInfo'); f.load();
  assert.equal(f.save().ok, true);
  assert.equal(readdirSync(dir).some(p => p.endsWith('.bak')), false);
});