import 'package:commons_core/commons_core.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:tane/services/message_store.dart';

import '../support/test_support.dart';

void main() {
  late MessageStore store;
  setUp(() => store = MessageStore(InMemorySecretStore()));

  PrivateMessage msg(String from, String text, int atMs) =>
      PrivateMessage(
          fromPubkey: from,
          text: text,
          at: DateTime.fromMillisecondsSinceEpoch(atMs));

  test('history is empty for an unknown peer', () async {
    expect(await store.history('peer'), isEmpty);
  });

  test('append then history round-trips, oldest first', () async {
    await store.append('peer', msg('peer', 'hi', 1000));
    await store.append('peer', msg('me', 'hello', 2000));
    final history = await store.history('peer');
    expect(history.map((m) => m.text), ['hi', 'hello']);
    expect(history.first.fromPubkey, 'peer');
    expect(history.last.at.millisecondsSinceEpoch, 2000);
  });

  test('conversations are kept separate per peer', () async {
    await store.append('a', msg('a', 'toA', 1));
    await store.append('b', msg('b', 'toB', 1));
    expect((await store.history('a')).single.text, 'toA');
    expect((await store.history('b')).single.text, 'toB');
  });

  test('conversations lists peers newest-first with their last message',
      () async {
    await store.append('peerA', msg('me', 'hi A', 1000));
    await store.append('peerB', msg('peerB', 'yo B', 3000));
    await store.append('peerA', msg('peerA', 'back A', 2000));

    final convos = await store.conversations();
    expect(convos.map((c) => c.peerPubkey), ['peerB', 'peerA']); // 3000 > 2000
    expect(convos.first.lastText, 'yo B');
    expect(convos.last.lastText, 'back A');
  });

  test('append is idempotent: a re-delivered message is not duplicated',
      () async {
    // Same sender + timestamp + text = the same gift wrap redelivered by a
    // relay on resubscribe. It must not pile up.
    expect(await store.append('peer', msg('peer', 'hola', 1000)), isTrue);
    expect(await store.append('peer', msg('peer', 'hola', 1000)), isFalse);
    expect(await store.history('peer'), hasLength(1));

    // A genuinely different message (later timestamp) still lands.
    expect(await store.append('peer', msg('peer', 'hola', 2000)), isTrue);
    expect(await store.history('peer'), hasLength(2));
  });

  test('history is capped to the most recent 200', () async {
    for (var i = 0; i < 210; i++) {
      await store.append('peer', msg('me', 'm$i', i));
    }
    final history = await store.history('peer');
    expect(history, hasLength(200));
    expect(history.first.text, 'm10'); // oldest 10 dropped
    expect(history.last.text, 'm209');
  });
}