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

import {
  collectGameTemplateRuntimes,
  collectGameTemplateTags,
  EMPTY_TEMPLATE_LIBRARY_FILTERS,
  filterGameTemplates,
  formatGameTemplateSize,
  type GameTemplateEntry,
  isTemplateLibraryFiltersEmpty,
  needsTemplateDownload,
  templateMatchesQuery,
  templateRuntimeLabel,
  toggleGameTemplateTag,
} from '../src/features/template-library/templateLibraryModel';

function template(
  overrides: Partial<GameTemplateEntry> & Pick<GameTemplateEntry, 'id'>,
): GameTemplateEntry {
  return {
    title: '未命名模板',
    summary: '',
    tags: [],
    runtime: 'html',
    engine: 'phaser',
    engineVersion: '4.2.1',
    templateVersion: '1.0.0',
    updatedAt: '2026-09-17T00:00:00Z',
    entry: 'game/index.html',
    zipUrl:
      'https://agc-dev.oss-rg-china-mainland.aliyuncs.com/templates/v1/demo/template.zip',
    zipSizeBytes: 2048,
    zipSha256: 'a'.repeat(64),
    coverUrl:
      'https://agc-dev.oss-rg-china-mainland.aliyuncs.com/templates/v1/demo/cover.png',
    coverWidth: 960,
    coverHeight: 540,
    installed: false,
    installedVersion: null,
    installedAtMillis: null,
    ...overrides,
  };
}

const matchThree = template({
  id: 'match-3',
  title: '三消经营',
  summary: '三消与模拟经营的融合模板',
  tags: ['三消', '经营'],
  engine: 'phaser',
  installed: true,
  installedVersion: '1.0.0',
});
const pixelFarm = template({
  id: 'pixel-farm',
  title: '像素农场',
  summary: '像素风种植玩法',
  tags: ['经营', '像素'],
  engine: 'godot',
  runtime: 'godot',
  templateVersion: '2.0.0',
  installed: true,
  installedVersion: '1.0.0',
});
const spaceShooter = template({
  id: 'space-shooter',
  title: '太空射击',
  summary: '纵版弹幕射击',
  tags: ['射击'],
  runtime: 'unity',
  engine: 'unity',
  installed: false,
});

const templates: GameTemplateEntry[] = [matchThree, pixelFarm, spaceShooter];

describe('templateMatchesQuery', () => {
  it('matches title, summary, tags and engine case-insensitively', () => {
    expect(templateMatchesQuery(matchThree, '三消')).toBe(true);
    expect(templateMatchesQuery(matchThree, '经营')).toBe(true);
    expect(templateMatchesQuery(matchThree, 'PHASER')).toBe(true);
    expect(templateMatchesQuery(matchThree, '弹幕')).toBe(false);
  });

  it('requires every whitespace separated term to match', () => {
    expect(templateMatchesQuery(pixelFarm, '像素 种植')).toBe(true);
    expect(templateMatchesQuery(pixelFarm, '像素 弹幕')).toBe(false);
    expect(templateMatchesQuery(pixelFarm, '   ')).toBe(true);
  });
});

describe('filterGameTemplates', () => {
  it('filters by tag, runtime, query and installed state together', () => {
    expect(
      filterGameTemplates(templates, {
        ...EMPTY_TEMPLATE_LIBRARY_FILTERS,
        tags: ['经营'],
      }).map((entry) => entry.id),
    ).toEqual(['match-3', 'pixel-farm']);

    expect(
      filterGameTemplates(templates, {
        ...EMPTY_TEMPLATE_LIBRARY_FILTERS,
        runtime: 'godot',
      }).map((entry) => entry.id),
    ).toEqual(['pixel-farm']);

    expect(
      filterGameTemplates(templates, {
        ...EMPTY_TEMPLATE_LIBRARY_FILTERS,
        installedOnly: true,
        query: '经营',
        tags: ['像素'],
      }).map((entry) => entry.id),
    ).toEqual(['pixel-farm']);
  });

  it('returns everything when no filter is active', () => {
    expect(
      filterGameTemplates(templates, EMPTY_TEMPLATE_LIBRARY_FILTERS),
    ).toHaveLength(3);
    expect(isTemplateLibraryFiltersEmpty(EMPTY_TEMPLATE_LIBRARY_FILTERS)).toBe(
      true,
    );
    expect(
      isTemplateLibraryFiltersEmpty({
        ...EMPTY_TEMPLATE_LIBRARY_FILTERS,
        query: ' x ',
      }),
    ).toBe(false);
  });
});

describe('tag and runtime options', () => {
  it('orders tags by frequency and drops blanks', () => {
    const withBlank = [
      ...templates,
      template({ id: 'blank-tag', tags: ['', '  ', '经营'] }),
    ];
    expect(collectGameTemplateTags(withBlank)).toEqual([
      '经营',
      '三消',
      '射击',
      '像素',
    ]);
  });

  it('collects distinct runtimes and labels them', () => {
    expect(collectGameTemplateRuntimes(templates)).toEqual([
      'godot',
      'html',
      'unity',
    ]);
    expect(templateRuntimeLabel('html')).toBe('网页');
    expect(templateRuntimeLabel('cocos')).toBe('Cocos');
    expect(templateRuntimeLabel('')).toBe('未标注运行时');
    expect(templateRuntimeLabel('custom-engine')).toBe('custom-engine');
  });

  it('toggles tags without mutating the previous filters', () => {
    const next = toggleGameTemplateTag(EMPTY_TEMPLATE_LIBRARY_FILTERS, '经营');
    expect(next.tags).toEqual(['经营']);
    expect(toggleGameTemplateTag(next, '经营').tags).toEqual([]);
    expect(EMPTY_TEMPLATE_LIBRARY_FILTERS.tags).toEqual([]);
  });
});

describe('needsTemplateDownload', () => {
  it('requires a download when missing or when the installed version is stale', () => {
    expect(needsTemplateDownload(matchThree)).toBe(false);
    expect(needsTemplateDownload(pixelFarm)).toBe(true);
    expect(needsTemplateDownload(spaceShooter)).toBe(true);
  });
});

describe('formatGameTemplateSize', () => {
  it('formats bytes, kilobytes and megabytes', () => {
    expect(formatGameTemplateSize(0)).toBe('--');
    expect(formatGameTemplateSize(512)).toBe('512 B');
    expect(formatGameTemplateSize(2048)).toBe('2.0 KB');
    expect(formatGameTemplateSize(5 * 1024 * 1024)).toBe('5.0 MB');
  });
});