import '../constants/charge_maps.dart';

class ChargeUtils {
  // ============ 无线充电 ============
  static String getDisplayPowerWireless(double power) {
    if (power == 0) return '读取中...';
    const List<int> levels = [5, 7, 15, 27, 40, 50, 66];
    if (power < 3) return '≈${power.round()}W';
    int matchedLevel = levels.firstWhere(
      (level) => power <= level + 2,
      orElse: () => levels.last,
    );
    return '≈${matchedLevel}W';
  }

  // ============ 旧的有线逻辑（保留兼容） ============
  static String getDisplayPowerWired(
    double power,
    int? wiredLevel,
    String chargeType,
  ) {
    if (chargeType == "SDP") return "≈7.5W";
    if (wiredLevel != null && ChargeMaps.wiredPower.containsKey(wiredLevel)) {
      double p = ChargeMaps.wiredPower[wiredLevel]!;
      if (p > 0) return '≈${p.toInt()}W';
    }
    double best = 0;
    for (var entry in ChargeMaps.wiredPower.entries) {
      if (entry.value <= power + 3 && entry.value > best) {
        best = entry.value;
      }
    }
    if (power == 0) return '读取中...';
    return best > 0 ? '≈${best.toInt()}W' : '≈${power.round()}W';
  }

  // ============ 主界面：实际 / 标定（旧版） ============
  static String getMainDisplayPowerWired(
    double power,
    int? wiredLevel,
    String chargeType,
  ) {
    if (chargeType == "SDP") return "≈7.5W";

    if (power == 0) return "读取中...";

    final actual = power.round();

    if (wiredLevel != null && ChargeMaps.wiredPower.containsKey(wiredLevel)) {
      final requested = ChargeMaps.wiredPower[wiredLevel]!.round();
      return "≈${actual}W/${requested}W";
    }

    return "≈${actual}W";
  }

  // ============ 主界面：BM 电池端功率 + 标定档位 ============
  /// 示例：5.98W / 7.5W、12.3W、读取中...
  static String getMainDisplayPowerBm(
    double bmPower,
    int? wiredLevel,
    String chargeType,
    bool isWireless,
  ) {
    if (bmPower <= 0 || bmPower > 100) return '读取中...';

    final powerStr = '${bmPower.toStringAsFixed(1)}W';

    if (isWireless || chargeType == 'SDP') return powerStr;

    if (wiredLevel != null && ChargeMaps.wiredPower.containsKey(wiredLevel)) {
      final requested = ChargeMaps.wiredPower[wiredLevel]!;
      final requestedStr = requested == requested.roundToDouble()
          ? requested.toInt().toString()
          : requested.toStringAsFixed(1);
      return '$powerStr / ${requestedStr}W';
    }

    return powerStr;
  }

  // ============ 详情页：标定档位 ============
  /// 示例：≈80W/L-10、≈7.5W/L-1
  static String getDetailRequestedPowerWired(
    double power,
    int? wiredLevel,
    String chargeType,
  ) {
    if (chargeType == "SDP") return "≈7.5W";

    if (power == 0) return "读取中...";

    if (wiredLevel != null && ChargeMaps.wiredPower.containsKey(wiredLevel)) {
      final requested = ChargeMaps.wiredPower[wiredLevel]!;
      final str = requested == requested.roundToDouble()
          ? requested.toInt().toString()
          : requested.toStringAsFixed(1);
      return "≈${str}W/L-$wiredLevel";
    }

    return "≈${power.round()}W";
  }

  // ============ 详情页：实际功率 ============
  static String getDetailActualPowerWired(double power, String chargeType) {
    if (chargeType == "SDP") return "≈7.5W";
    if (power == 0) return "读取中...";
    return "≈${power.round()}W";
  }

  // ============ 充电类型标签 ============
  static String getChargeTypeLabel(bool isWireless, String chargeType) {
    if (isWireless) {
      return chargeType == "无线" ? "无线" : chargeType;
    }
    if (chargeType.isEmpty) {
      return "识别中...";
    }
    if (chargeType == 'PPS') return 'PPS';
    if (chargeType == 'SDP') return 'USB';
    return chargeType;
  }
}