import test from 'node:test';
import assert from 'node:assert/strict';
import * as S from '../src/state.ts';

test('autoBindProject: 启动无项目且有项目时自动绑首项', () => {
  assert.equal(S.autoBindProject(null, [{ name: 'A' }, { name: 'B' }]), 'A');
});

test('autoBindProject: 指向已删除项目时回退首项', () => {
  assert.equal(S.autoBindProject('X', [{ name: 'A' }]), 'A');
});

test('autoBindProject: 已选有效项目保持不变', () => {
  assert.equal(S.autoBindProject('A', [{ name: 'A' }]), 'A');
});

test('shouldHideUploadSelect: 始终 false（选项目时也允许补传其它类型）', () => {
  assert.equal(S.shouldHideUploadSelect(null, null), false);
  assert.equal(S.shouldHideUploadSelect(null, 'A'), false);
  assert.equal(S.shouldHideUploadSelect('A', null), false);
  assert.equal(S.shouldHideUploadSelect('A', 'A'), false);
});

test('resolveUploadType: 始终尊重用户下拉选择', () => {
  assert.equal(S.resolveUploadType(null, 'A', 'template'), 'template');
  assert.equal(S.resolveUploadType(null, null, 'template'), 'template');
  assert.equal(S.resolveUploadType('A', null, 'existing_system'), 'existing_system');
});

test('computeDrawerSnapshot: 去空白并以单元分隔符连接', () => {
  assert.equal(S.computeDrawerSnapshot([' a ', 'b']), 'a\u0001b');
});

test('isDrawerDirty: 快照不同为脏，相同为干净', () => {
  assert.equal(S.isDrawerDirty('x', 'y'), true);
  assert.equal(S.isDrawerDirty('x', 'x'), false);
});

test('buildWelcome: 无项目提示新建/选择项目', () => {
  assert.match(S.buildWelcome(null), /请新建项目|选择项目/);
});

test('buildWelcome: 有项目时提示由项目提供模板/规则/代码库', () => {
  const txt = S.buildWelcome('A');
  assert.match(txt, /项目「A」/);
  assert.match(txt, /要件定义/);
});

test('emptyHeadline: 返回空态主标题', () => {
  assert.match(S.emptyHeadline(), /有什么可以帮到你的/);
});

test('quickPrompts: 返回 4 条快捷提示且含影响调查', () => {
  const p = S.quickPrompts();
  assert.equal(p.length, 4);
  assert.ok(p.includes('影响调查'));
});

test('autoBindProject: explicitNone=true 时不覆写（保留 null）', () => {
  assert.equal(S.autoBindProject(null, [{ name: 'A' }], true), null);
});

test('groupSessionsByProject: 按项目分组，空项目入 other', () => {
  const rows: Array<{ session_id: string; project?: string }> = [
    { session_id: '1', project: 'A' },
    { session_id: '2', project: 'B' },
    { session_id: '3', project: '' },
    { session_id: '4' },
  ];
  const r = S.groupSessionsByProject(rows);
  assert.equal(r.byProject.A.length, 1);
  assert.equal(r.byProject.B.length, 1);
  assert.equal(r.other.length, 2);
});