import { describe, expect, it } from 'vitest';

import {
  dedupeName,
  formatNamingDate,
  formatNamingSequence,
  resolveNamingTemplate,
  sanitizeFilename,
  validateNamingTemplate,
} from './naming.js';

describe('sanitizeFilename', () => {
  it('替换路径分隔符与非法字符，保留中文', () => {
    expect(sanitizeFilename('素材/标签:01*?.png')).toBe('素材_标签_01__.png');
  });

  it('去除首尾空格与点，空名回退', () => {
    expect(sanitizeFilename('  ..脚本草稿 .. ')).toBe('脚本草稿');
    expect(sanitizeFilename('   ')).toBe('未命名');
    expect(sanitizeFilename('***', { fallback: 'file' })).toBe('file');
  });

  it('Windows 保留名追加下划线', () => {
    expect(sanitizeFilename('CON')).toBe('CON_');
    expect(sanitizeFilename('lpt1')).toBe('lpt1_');
  });

  it('超长时保留扩展名', () => {
    const name = sanitizeFilename(`${'a'.repeat(200)}.png`, { maxLength: 20 });
    expect(name).toHaveLength(20);
    expect(name.endsWith('.png')).toBe(true);
  });
});

describe('dedupeName（R-01 同名自动加序号）', () => {
  it('不冲突时原样返回', () => {
    expect(dedupeName('脚本-01', new Set())).toBe('脚本-01');
  });

  it('冲突时追加两位序号', () => {
    const existing = new Set(['素材.png', '素材-02.png']);
    expect(dedupeName('素材.png', existing)).toBe('素材-03.png');
  });

  it('带序号的名字基于原始基名递增', () => {
    const existing = new Set(['素材-02.png', '素材-03.png']);
    expect(dedupeName('素材-03.png', existing)).toBe('素材-04.png');
  });

  it('序号耗尽时抛错', () => {
    const existing = new Set(['a', ...Array.from({ length: 3 }, (_, i) => `a-0${String(i + 2)}`)]);
    expect(() => dedupeName('a', existing, 3)).toThrow(RangeError);
  });
});

describe('命名模板（A4-BE-03 / R-01）', () => {
  const context = {
    industry: '电商',
    customer: '花间集',
    direction: '口播',
    date: '20261104',
    sequence: 1,
    spec: '1080x1920',
  };

  it('默认脚本模板解析为「行业-客户-方向-日期-序号」', () => {
    expect(resolveNamingTemplate('{行业}-{客户}-{脚本方向}-{日期}-{序号}', context)).toBe(
      '电商-花间集-口播-20261104-1',
    );
  });

  it('序号可先补零后传入', () => {
    expect(
      resolveNamingTemplate('{行业}-{客户}-{日期}-{序号}', {
        ...context,
        sequence: formatNamingSequence(context.sequence),
      }),
    ).toBe('电商-花间集-20261104-01');
  });

  it('兼容英文 key 与规格后缀', () => {
    expect(resolveNamingTemplate('{industry}-{customer}-{date}-{seq}-{spec}', context)).toBe(
      '电商-花间集-20261104-1-1080x1920',
    );
  });

  it('未知占位符 / 非法字符 / 空模板被拒绝', () => {
    expect(validateNamingTemplate('{行业}-{未知}').valid).toBe(false);
    expect(validateNamingTemplate('{行业}*{客户}').valid).toBe(false);
    expect(validateNamingTemplate('   ').valid).toBe(false);
  });

  it('缺失占位符值时抛错', () => {
    expect(() => resolveNamingTemplate('{行业}-{客户}', { ...context, customer: '' })).toThrow(
      '命名占位符缺少值',
    );
  });

  it('超过最大长度抛错', () => {
    expect(() =>
      resolveNamingTemplate('{客户}', { ...context, customer: '客'.repeat(101) }),
    ).toThrow('不能超过 100 个字符');
  });

  it('日期与序号格式化', () => {
    expect(formatNamingDate(new Date(2026, 10, 4))).toBe('20261104');
    expect(formatNamingSequence(7)).toBe('07');
    expect(formatNamingSequence(123)).toBe('123');
    expect(() => formatNamingSequence(-1)).toThrow();
  });
});