// Author: fruit.com.cn

import 'json_numbers.dart';

/// 金币钱包与流水：对应 `GET /app/wallet` 的 `wallet` / `ledger`。
class CoinWallet {
  const CoinWallet({
    required this.coinBalance,
    required this.totalRechargedCoin,
    required this.totalConsumedCoin,
    required this.totalRefundedCoin,
  });

  final int coinBalance;
  final int totalRechargedCoin;
  final int totalConsumedCoin;
  final int totalRefundedCoin;

  factory CoinWallet.fromJson(Map<String, dynamic> json) {
    return CoinWallet(
      coinBalance: jsonToInt(json['coinBalance']),
      totalRechargedCoin: jsonToInt(json['totalRechargedCoin']),
      totalConsumedCoin: jsonToInt(json['totalConsumedCoin']),
      totalRefundedCoin: jsonToInt(json['totalRefundedCoin']),
    );
  }
}

/// 一笔金币变动；[changeAmount] 正数入账、负数出账。
class CoinLedgerEntry {
  const CoinLedgerEntry({
    required this.id,
    required this.changeAmount,
    required this.balanceAfter,
    required this.bizType,
    required this.remark,
    required this.createdAt,
  });

  final String id;
  final int changeAmount;
  final int balanceAfter;
  final String bizType;
  final String remark;
  final DateTime? createdAt;

  factory CoinLedgerEntry.fromJson(Map<String, dynamic> json) {
    return CoinLedgerEntry(
      id: (json['id'] ?? '').toString(),
      changeAmount: jsonToInt(json['changeAmount']),
      balanceAfter: jsonToInt(json['balanceAfter']),
      bizType: json['bizType'] as String? ?? '',
      remark: json['remark'] as String? ?? '',
      createdAt: DateTime.tryParse(json['createdAt'] as String? ?? ''),
    );
  }
}

/// 钱包页一次渲染所需的余额与最近流水。
class WalletSnapshot {
  const WalletSnapshot({required this.wallet, this.ledger = const []});

  final CoinWallet wallet;
  final List<CoinLedgerEntry> ledger;

  factory WalletSnapshot.fromJson(Map<String, dynamic> json) {
    final wallet = json['wallet'];
    return WalletSnapshot(
      wallet: wallet is Map<String, dynamic>
          ? CoinWallet.fromJson(wallet)
          : const CoinWallet(
              coinBalance: 0,
              totalRechargedCoin: 0,
              totalConsumedCoin: 0,
              totalRefundedCoin: 0,
            ),
      ledger: (json['ledger'] as List? ?? const [])
          .whereType<Map<String, dynamic>>()
          .map(CoinLedgerEntry.fromJson)
          .toList(),
    );
  }
}

/// 金币解锁结果：`POST /app/episodes/{id}/unlock`。
class UnlockResult {
  const UnlockResult({
    required this.unlocked,
    required this.accessType,
    required this.coinCost,
    required this.coinBalance,
  });

  final bool unlocked;
  final String accessType;
  final int coinCost;
  final int coinBalance;

  factory UnlockResult.fromJson(Map<String, dynamic> json) {
    return UnlockResult(
      unlocked: json['unlocked'] == true,
      accessType: json['accessType'] as String? ?? '',
      coinCost: jsonToInt(json['coinCost']),
      coinBalance: jsonToInt(json['coinBalance']),
    );
  }
}