process.env.DATABASE_PATH = ':memory:';
process.env.THEMES_DIR = './themes';
process.env.FRONTEND_DIST = './frontend/dist';
process.env.UPLOAD_SIZE_LIMIT = '5mb';
process.env.NODE_ENV = 'test';

import { Test } from '@nestjs/testing';
import { TypeOrmModule } from '@nestjs/typeorm';
import { ConfigModule } from '@nestjs/config';
import { getDataSourceToken } from '@nestjs/typeorm';
import * as fs from 'fs';
import * as os from 'os';
import * as path from 'path';
import { validateEnv } from '../../backend/src/config/env.schema';
import { RestoreService } from '../../backend/src/modules/admin/system/restore.service';
import { FilesystemTransactionService } from '../../backend/src/modules/admin/system/filesystem-transaction.service';
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';
import { AdminOperationTokenEntity } from '../../backend/src/database/entities/admin-operation-token.entity';

describe('Job 871: RestoreService validation rejects malformed archives before mutation', () => {
  let moduleRef: any;
  let restore: RestoreService;
  let dataSource: any;

  beforeAll(async () => {
    process.env.UPLOAD_DIR = fs.mkdtempSync(path.join(os.tmpdir(), 'hipctf-restore-uploads-'));
    moduleRef = await Test.createTestingModule({
      imports: [
        ConfigModule.forRoot({ isGlobal: true, validate: validateEnv }),
        TypeOrmModule.forRoot({
          type: 'better-sqlite3',
          database: ':memory:',
          entities: [
            UserEntity, SettingEntity, CategoryEntity, ChallengeEntity,
            ChallengeFileEntity, SolveEntity, RefreshTokenEntity, BlogPostEntity,
            AdminOperationTokenEntity,
          ],
          synchronize: true,
        }),
      ],
      providers: [RestoreService, FilesystemTransactionService],
    }).compile();
    moduleRef.init();
    dataSource = moduleRef.get(getDataSourceToken());
    restore = moduleRef.get(RestoreService);
  });

  afterAll(async () => {
    const dir = process.env.UPLOAD_DIR!;
    if (fs.existsSync(dir)) {
      try {
        fs.rmSync(dir, { recursive: true, force: true });
      } catch {
        // ignore
      }
    }
    await moduleRef?.close();
  });

  it('rejects empty JSON', async () => {
    await expect(restore.stageArchive('', 'admin-1')).rejects.toMatchObject({
      code: 'SYSTEM_RESTORE_VALIDATION_FAILED',
    });
  });

  it('rejects wrong format', async () => {
    const bad = JSON.stringify({ format: 'wrong', version: 1, exportedAt: 'x', tables: {}, uploads: [] });
    await expect(restore.stageArchive(bad, 'admin-1')).rejects.toMatchObject({
      code: 'SYSTEM_RESTORE_VALIDATION_FAILED',
    });
  });

  it('rejects base64 size mismatch', async () => {
    const bad = {
      format: 'hipctf-system-backup',
      version: 1,
      exportedAt: 'x',
      tables: {},
      uploads: [
        {
          path: 'icons/mismatch.png',
          originalFilename: 'm.png',
          mimeType: 'image/png',
          sizeBytes: 100,
          dataBase64: Buffer.from('short').toString('base64'),
        },
      ],
    };
    await expect(restore.stageArchive(JSON.stringify(bad), 'admin-1')).rejects.toMatchObject({
      code: 'SYSTEM_RESTORE_VALIDATION_FAILED',
    });
  });

  it('rejects path traversal', async () => {
    const data = Buffer.alloc(0).toString('base64');
    const bad = {
      format: 'hipctf-system-backup',
      version: 1,
      exportedAt: 'x',
      tables: {},
      uploads: [
        {
          path: '../../../etc/passwd',
          originalFilename: 'x',
          mimeType: 'application/octet-stream',
          sizeBytes: 0,
          dataBase64: data,
        },
      ],
    };
    await expect(restore.stageArchive(JSON.stringify(bad), 'admin-1')).rejects.toMatchObject({
      code: 'SYSTEM_RESTORE_VALIDATION_FAILED',
    });
  });

  it('does not mutate live data after rejected validation', async () => {
    const users = await dataSource.query('SELECT COUNT(*) AS c FROM user');
    expect(Number((users as any[])[0]?.c ?? 0)).toBeGreaterThanOrEqual(0);
    const stagedCount = (restore as any).stages?.size ?? 0;
    expect(stagedCount).toBe(0);
  });
});