// Author: fruit.com.cn

import 'package:flutter_test/flutter_test.dart';
import 'package:fruitshorts/core/data/models/wallet.dart';
import 'package:fruitshorts/core/data/remote/api_exception.dart';
import 'package:fruitshorts/core/data/repositories/commerce_repository.dart';
import 'package:fruitshorts/core/data/services/wallet_controller.dart';

void main() {
  test('should_expose_server_balance_when_wallet_loads', () async {
    final controller = WalletController(
      FakeCommerceRepository(snapshot: _snapshot(balance: 320)),
    );

    await controller.load();

    expect(controller.balance, 320);
    expect(controller.ledger.single.changeAmount, -50);
    expect(controller.error, isNull);
  });

  test('should_update_balance_and_clear_error_when_unlock_succeeds', () async {
    final repository = FakeCommerceRepository(
      snapshot: _snapshot(balance: 320),
      unlockResult: const UnlockResult(
        unlocked: true,
        accessType: 'UNLOCKED',
        coinCost: 50,
        coinBalance: 270,
      ),
    );
    final controller = WalletController(repository);
    await controller.load();

    final result = await controller.unlock('episode-9');

    expect(result?.unlocked, isTrue);
    expect(controller.balance, 270);
    expect(controller.unlocking, isFalse);
    expect(controller.unlockError, isNull);
  });

  test('should_keep_balance_and_expose_message_when_unlock_is_rejected', () async {
    final controller = WalletController(
      FakeCommerceRepository(
        snapshot: _snapshot(balance: 20),
        unlockError: const ApiException(100002, '金币余额不足'),
      ),
    );
    await controller.load();

    final result = await controller.unlock('episode-9');

    expect(result, isNull);
    expect(controller.balance, 20);
    expect(controller.unlockError, '金币余额不足');
  });
}

WalletSnapshot _snapshot({required int balance}) => WalletSnapshot(
  wallet: CoinWallet(
    coinBalance: balance,
    totalRechargedCoin: 500,
    totalConsumedCoin: 180,
    totalRefundedCoin: 0,
  ),
  ledger: [
    CoinLedgerEntry(
      id: '1',
      changeAmount: -50,
      balanceAfter: balance,
      bizType: 'UNLOCK',
      remark: '解锁第 3 集',
      createdAt: DateTime(2026, 10, 19),
    ),
  ],
);

class FakeCommerceRepository implements CommerceRepository {
  FakeCommerceRepository({
    required this.snapshot,
    this.unlockResult,
    this.unlockError,
  });

  final WalletSnapshot snapshot;
  final UnlockResult? unlockResult;
  final ApiException? unlockError;
  final List<String> unlockedEpisodes = [];

  @override
  Future<WalletSnapshot> fetchWallet() async => snapshot;

  @override
  Future<UnlockResult> unlock(String episodeId) async {
    unlockedEpisodes.add(episodeId);
    if (unlockError != null) throw unlockError!;
    return unlockResult!;
  }
}