import * as path from 'path';
import { MigrationInterface, QueryRunner } from 'typeorm';
import { InitSchema1700000000000 } from '../../backend/src/database/migrations/1700000000000-InitSchema';
import { SeedSystemData1700000000100 } from '../../backend/src/database/migrations/1700000000100-SeedSystemData';
import { AddCategoryTimestampsAndUniqueAbbrev1700000000200 } from '../../backend/src/database/migrations/1700000000200-AddCategoryTimestampsAndUniqueAbbrev';
import { UpdateSystemCategoryKeys1700000000300 } from '../../backend/src/database/migrations/1700000000300-UpdateSystemCategoryKeys';
import { DataSource } from 'typeorm';
import { UserEntity } from '../../backend/src/database/entities/user.entity';
import { SettingEntity } from '../../backend/src/database/entities/setting.entity';
import { CategoryEntity } from '../../backend/src/database/entities/category.entity';
import { ChallengeEntity } from '../../backend/src/database/entities/challenge.entity';
import { ChallengeFileEntity } from '../../backend/src/database/entities/challenge-file.entity';
import { SolveEntity } from '../../backend/src/database/entities/solve.entity';
import { RefreshTokenEntity } from '../../backend/src/database/entities/refresh-token.entity';
import { BlogPostEntity } from '../../backend/src/database/entities/blog-post.entity';

describe('Migrations', () => {
  let dataSource: DataSource;

  beforeAll(async () => {
    dataSource = new DataSource({
      type: 'better-sqlite3',
      database: ':memory:',
      entities: [UserEntity, SettingEntity, CategoryEntity, ChallengeEntity, ChallengeFileEntity, SolveEntity, RefreshTokenEntity, BlogPostEntity],
      migrations: [
        InitSchema1700000000000,
        SeedSystemData1700000000100,
        AddCategoryTimestampsAndUniqueAbbrev1700000000200,
        UpdateSystemCategoryKeys1700000000300,
      ],
      migrationsRun: true,
      synchronize: false,
      logging: false,
    });
    await dataSource.initialize();
  });

  afterAll(async () => {
    await dataSource.destroy();
  });

  it('creates all required tables', async () => {
    const tables = await dataSource.query("SELECT name FROM sqlite_master WHERE type='table'");
    const names = tables.map((t: any) => t.name);
    expect(names).toEqual(expect.arrayContaining([
      'user', 'setting', 'category', 'challenge', 'challenge_file',
      'solve', 'refresh_token', 'blog_post',
    ]));
  });

  it('seeds 6 system categories with unique system_keys', async () => {
    const cats = await dataSource.getRepository(CategoryEntity).find();
    const systemCats = cats.filter((c) => c.systemKey);
    expect(systemCats.length).toBeGreaterThanOrEqual(6);
    const keys = systemCats.map((c) => c.systemKey);
    expect(new Set(keys).size).toBe(keys.length);
  });

  it('seeds default settings', async () => {
    const settings = await dataSource.getRepository(SettingEntity).find();
    const keys = settings.map((s) => s.key);
    expect(keys).toEqual(expect.arrayContaining(['pageTitle', 'themeKey', 'eventStartUtc', 'eventEndUtc']));
  });

  it('enforces UNIQUE(challengeId, userId) on solve', async () => {
    const indexes = await dataSource.query("SELECT name, sql FROM sqlite_master WHERE type='index' AND tbl_name='solve'");
    const uq = indexes.find((i: any) => /UNIQUE.*challenge_id.*user_id/i.test(i.sql || ''));
    expect(uq).toBeDefined();
  });

  it('enforces ON DELETE RESTRICT FK on solve', async () => {
    const fks = await dataSource.query("PRAGMA foreign_key_list('solve')");
    const restrict = fks.filter((f: any) => f.on_delete === 'RESTRICT');
    expect(restrict.length).toBeGreaterThanOrEqual(2);
  });
});