package com.zksy.gas.utils;

import com.zksy.gas.domain.GasMonitorData;

import java.math.BigDecimal;
import java.time.LocalDateTime;

public class DataParser {

    public static GasMonitorData parseMessage(byte[] frame) {
        GasMonitorData data = new GasMonitorData();

        // 帧类型
        data.setFrameType(frame[2] & 0xFF);

        // MAC 地址
        byte[] macBytes = new byte[8];
        System.arraycopy(frame, 3, macBytes, 0, 8);
        data.setMacAddress(ProtocolUtils.bytesToHex(macBytes));

        // 短地址
        data.setShortAddress(String.format("%02X%02X", frame[11], frame[12]));

        // 自动应答
        data.setAutoReplyOption(frame[13] & 0xFF);

        // 序号
        data.setSequenceNo(frame[15] & 0xFF);

        // 命令
        data.setCommand(frame[16] & 0xFF);

        // 设备属性
        data.setDeviceAttr(frame[17] & 0xFF);

        // 协议版本
        data.setProtocolVersion(String.format("%02X", frame[18]));

        // 报警信息（小端序 00 04 -> 0x0400）
        int alarmInfo = ((frame[20] & 0xFF) << 8) | (frame[19] & 0xFF);
        data.setAlarmInfo(alarmInfo);

        // 时间戳（BCD）
        LocalDateTime reportTime = ProtocolUtils.parseTimestamp(frame, 21);
        data.setReportTime(reportTime);

        // 数据个数
        int dataCount = frame[27] & 0xFF;

        // ------- 数据段开始（例子里有 5 个数据） -------
        int offset = 28;

        // 1. 气体浓度 + 气体类型
        // 格式：04 10 00 00 00 00 -> 1004 (浓度=100, 类型=CH4)
        int gasValue = ((frame[offset + 1] & 0xFF) << 8) | (frame[offset] & 0xFF);
        int gasTypeCode = ((frame[offset + 3] & 0xFF) << 8) | (frame[offset + 2] & 0xFF);
        data.setGasConcentration(BigDecimal.valueOf(gasValue));
        data.setGasType(gasTypeCode == 0x0004 ? "CH4" : "未知");

        offset += 6;

        // 2. 电池电量
        float battery = ProtocolUtils.bytesToFloatLE(frame, offset + 2);
        data.setBattery(BigDecimal.valueOf(battery));
        offset += 6;

        // 3. 信号强度
        float signal = ProtocolUtils.bytesToFloatLE(frame, offset + 2);
        data.setSignalStrength(signal);
        offset += 6;

        // 4. 经度
        float lon = ProtocolUtils.bytesToFloatLE(frame, offset + 2);
        data.setLongitude(BigDecimal.valueOf(lon));
        offset += 6;

        // 5. 纬度
        float lat = ProtocolUtils.bytesToFloatLE(frame, offset + 2);
        data.setLatitude(BigDecimal.valueOf(lat));
        offset += 6;

        // 入库时间
        data.setCreateTime(LocalDateTime.now());

        return data;
    }

    public static void main(String[] args) {
        // 示例报文
        String hex = "7E003A902509040070010000FFFE01AA2B00010813000425091908473305"
                + "041000000000F96F00000000F76F0000F841FA6F00000000FB6F0000000007";

        byte[] frame = ProtocolUtils.hexStringToBytes(hex);

        GasMonitorData parsed = parseMessage(frame);

        System.out.println("========== 解析结果 ==========");
        System.out.println("帧类型: " + parsed.getFrameType());
        System.out.println("MAC地址: " + parsed.getMacAddress());
        System.out.println("短地址: " + parsed.getShortAddress());
        System.out.println("自动应答: " + parsed.getAutoReplyOption());
        System.out.println("序号: " + parsed.getSequenceNo());
        System.out.println("命令: " + parsed.getCommand());
        System.out.println("设备属性: " + parsed.getDeviceAttr());
        System.out.println("协议版本: " + parsed.getProtocolVersion());
        System.out.println("报警信息: " + parsed.getAlarmInfo());
        System.out.println("时间戳: " + parsed.getReportTime());
        System.out.println("气体浓度: " + parsed.getGasConcentration() + " %LEL");
        System.out.println("气体类型: " + parsed.getGasType());
        System.out.println("电池电量: " + parsed.getBattery());
        System.out.println("信号强度: " + parsed.getSignalStrength());
        System.out.println("经度: " + parsed.getLongitude());
        System.out.println("纬度: " + parsed.getLatitude());
        System.out.println("入库时间: " + parsed.getCreateTime());
    }
}