import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import Database from 'better-sqlite3';
import { runMigrations } from '../src/database/client.js';
import { RedditUsersRepository } from '../src/database/repositories.js';

describe('RedditUsersRepository', () => {
  let db: Database.Database;
  let repo: RedditUsersRepository;

  beforeEach(() => {
    db = new Database(':memory:');
    db.pragma('foreign_keys = ON');
    runMigrations(db);
    repo = new RedditUsersRepository(db);
  });

  afterEach(() => {
    db.close();
  });

  it('upserts a new user and reads it back', () => {
    repo.upsert({ t2Id: 't2_abc', username: 'alice' });
    const got = repo.getByT2('t2_abc');
    expect(got?.username).toBe('alice');
    expect(got?.t2Id).toBe('t2_abc');
  });

  it('normalizes a bare t2 id when looking up or writing', () => {
    repo.upsert({ t2Id: 'abc', username: 'alice' });
    expect(repo.getByT2('abc')?.username).toBe('alice');
    expect(repo.getByT2('t2_abc')?.username).toBe('alice');
  });

  it('updates the username when the same t2 is upserted twice', () => {
    repo.upsert({ t2Id: 't2_abc', username: 'old_name' });
    repo.upsert({ t2Id: 't2_abc', username: 'new_name' });
    expect(repo.getByT2('t2_abc')?.username).toBe('new_name');
  });

  it('refuses to store t2_-prefixed pseudo-usernames', () => {
    repo.upsert({ t2Id: 't2_abc', username: 't2_abc' });
    expect(repo.getByT2('t2_abc')).toBeNull();
  });

  it('refuses to store MXID-shaped pseudo-usernames', () => {
    repo.upsert({ t2Id: 't2_abc', username: '@t2_abc:reddit.com' });
    expect(repo.getByT2('t2_abc')).toBeNull();
  });

  it('looks up by username case-insensitively', () => {
    repo.upsert({ t2Id: 't2_abc', username: 'Alice' });
    expect(repo.getByUsername('alice')?.t2Id).toBe('t2_abc');
    expect(repo.getByUsername('ALICE')?.t2Id).toBe('t2_abc');
  });

  it('preserves an existing mxid when a later upsert passes null', () => {
    repo.upsert({ t2Id: 't2_abc', username: 'alice', mxid: '@t2_abc:reddit.com' });
    repo.upsert({ t2Id: 't2_abc', username: 'alice' });
    expect(repo.getByT2('t2_abc')?.mxid).toBe('@t2_abc:reddit.com');
  });

  it('bulk-inserts via upsertMany', () => {
    repo.upsertMany([
      { t2Id: 't2_a', username: 'alice' },
      { t2Id: 't2_b', username: 'bob' },
    ]);
    const all = repo.getAll();
    expect(all.map((u) => u.username).sort()).toEqual(['alice', 'bob']);
  });
});