//============================================================================
// pccuTest：pCCU 协议编解码 / 校验和 / 帧长度 / 链路分发 / 数据库 单元测试
// 无第三方测试库，独立可执行。参照 test/until/testSqlitdb.cpp 的轻量风格。
//============================================================================

#include <cstdio>
#include <cstdlib>
#include <string>
#include <vector>
#include <iostream>

#include "../../src/pCCU/protocol/FieldCodec.h"
#include "../../src/pCCU/protocol/Frame.h"
#include "../../src/pCCU/protocol/ChecksumPolicy.h"
#include "../../src/pCCU/protocol/MessageRegistry.h"
#include "../../src/pCCU/protocol/FcProtocol.h"
#include "../../src/pCCU/protocol/PmProtocol.h"
#include "../../src/pCCU/protocol/BatProtocol.h"
#include "../../src/pCCU/comm/LinkManager.h"
#include "../../src/pCCU/comm/FcLinkManager.h"
#include "../../src/pCCU/comm/PmLinkManager.h"
#include "../../src/pCCU/comm/BatLinkManager.h"
#include "../../src/pCCU/store/DbStore.h"

using namespace ccu;

static int g_fail = 0;
static int g_pass = 0;

#define CHECK(cond) do { \
    if (cond) { ++g_pass; } \
    else { ++g_fail; std::printf("FAIL %s:%d  %s\n", __FILE__, __LINE__, #cond); } \
} while (0)

//--------------------------------------------------------------------------
// 1. 帧长度必须与协议文档一致
static void testFrameLengths() {
    FcControlMessage  fcm;
    FcStatusMessage   fsm;
    PmControlMessage  pcm;
    PmParamSetMessage pps;
    PmParamSetFbMessage ppf;
    PmStatusMessage   psm;

    CHECK(fcm.totalLength() == 24);   // FC 控制指令 24B（1.1.1：域字节数0x0018）
    CHECK(fsm.totalLength() == 150);  // FC 状态反馈 150B
    CHECK(pcm.totalLength() == 45);   // PM 操控指令 45B
    CHECK(pps.totalLength() == 28);   // PM 参数设定 28B
    CHECK(ppf.totalLength() == 12);   // PM 参数反馈 12B
    CHECK(psm.totalLength() == 248);  // PM 状态报文 248B
}

//--------------------------------------------------------------------------
// 2. FC 控制指令编解码往返
static void testFcControlRoundTrip() {
    FcControlValue v;
    v.mode = 2; v.cmd = 2; v.outputPower = 100; v.pitch1 = 35;
    v.roll1 = -12;
    v.emergencyAllow = 0x03; v.depth = 150;
    v.supplyCmd = 1; v.reservedCmd5 = 5; v.reservedCmd6 = 6; v.heartbeat = 7;

    FcControlMessage msg;
    std::vector<uint8_t> frame = msg.encode(v);

    CHECK(frame.size() == 24);
    CHECK(frame[0] == 0x40 && frame[1] == 0x40);
    CHECK(frame[4] == 0x18 && frame[5] == 0x00);   // 域字节数 0x0018 小端

    // 字节位置校验（数据域起点=帧头6）：姿态数据1 int16 小端，数据2字节预留恒0
    CHECK(frame[6 + 3] == 0x23 && frame[6 + 4] == 0x00);   // 纵倾数据1 = 35
    CHECK(frame[6 + 5] == 0x00 && frame[6 + 6] == 0x00);   // 预留（0827协议，原纵倾数据2）
    CHECK(frame[6 + 7] == 0xF4 && frame[6 + 8] == 0xFF);   // 横倾数据1 = -12 (0xFFF4)
    CHECK(frame[6 + 9] == 0x00 && frame[6 + 10] == 0x00);  // 预留（0827协议，原横倾数据2）

    FcControlValue out;
    CHECK(msg.decode(frame, static_cast<void*>(&out)));
    CHECK(out.mode == 2);
    CHECK(out.cmd == 2);
    CHECK(out.outputPower == 100);
    CHECK(out.pitch1 == 35);
    CHECK(out.roll1 == -12);
    CHECK(out.emergencyAllow == 0x03);
    CHECK(out.depth == 150);
    CHECK(out.supplyCmd == 1);
    CHECK(out.reservedCmd5 == 5 && out.reservedCmd6 == 6);
    CHECK(out.heartbeat == 7);
}

//--------------------------------------------------------------------------
// 3. FC 状态编解码往返（关键字段抽查）
static void testFcStatusRoundTrip() {
    FcStatusValue v;
    v.fc_mode = 2; v.fc_status = 6; v.fc_fault_level = 0;
    v.fault_level_1 = 0x0102; v.fault_level_2 = 0x0304;
    v.fault_level_3 = 0x0506; v.fault_level_4 = 0x0708;
    v.total_generation_time = 12345;
    v.generation_power = 23456;
    v.hydrogen_capacity = 80; v.liquid_oxygen_capacity = 70;
    v.palladium_temp = 350; v.buffer_tank_pressure = 200;
    v.dcdc1_in_voltage = 12; v.dcdc_out_current = 33;
    v.methanol_total_use = 100;
    v.cabin_temp1 = 25; v.h2_concentration1 = 500;
    v.heartbeat = 9; v.emergency_cmd = 0x01;
    v.reserved[0] = 0xAAAA; v.remaining_generation = 0xBBBB;

    FcStatusMessage msg;
    std::vector<uint8_t> frame = msg.encode(v);
    CHECK(frame.size() == 150);

    // 字节位置校验（对照 0821 docx）：发电功率在字节21-22(offset 14)，心跳在字节149(offset 142)
    CHECK(frame[6 + 12] == 0);    // 故障等级 offset12
    CHECK(frame[6 + 14] == 0xA0 && frame[6 + 15] == 0x5B); // 发电功率 23456 -> 0x5BA0 小端
    CHECK(frame[6 + 142] == 9);   // 心跳 offset142
    CHECK(frame[6 + 143] == 0x01);// 应急指令 offset143

    FcStatusValue out;
    CHECK(msg.decode(frame, static_cast<void*>(&out)));
    CHECK(out.fc_mode == 2 && out.fc_status == 6);
    CHECK(out.fault_level_1 == 0x0102 && out.fault_level_4 == 0x0708);
    CHECK(out.total_generation_time == 12345);
    CHECK(out.generation_power == 23456);
    CHECK(out.hydrogen_capacity == 80 && out.liquid_oxygen_capacity == 70);
    CHECK(out.palladium_temp == 350);
    CHECK(out.dcdc1_in_voltage == 12 && out.dcdc_out_current == 33);
    CHECK(out.methanol_total_use == 100);
    CHECK(out.cabin_temp1 == 25 && out.h2_concentration1 == 500);
    CHECK(out.heartbeat == 9 && out.emergency_cmd == 0x01);
    CHECK(out.reserved[0] == 0xAAAA && out.remaining_generation == 0xBBBB);
}

//--------------------------------------------------------------------------
// 4. PM 操控指令编解码往返
static void testPmControlRoundTrip() {
    PmControlValue v;
    v.year = 2026; v.month = 8; v.day = 26; v.hour = 17; v.minute = 30; v.second = 5;
    v.millisecond10 = 3;
    v.mode = 2; v.cmd = 2; v.outputPower = 120;
    v.pitch = 35; v.roll = -12;
    v.emergencyAllow = 0x03; v.depth = 200;
    v.supplyCmd = 1; v.reservedCmd5 = 5; v.reservedCmd6 = 6;
    v.insBatCmd = 0x10; v.dynBatCmd = 0x20; v.dynBatPower = 300;
    v.heartbeat = 11; v.hostState = 0xAA;
    v.reserved1 = 0x11223344; v.reserved2 = 0x55667788;

    PmControlMessage msg;
    std::vector<uint8_t> frame = msg.encode(v);
    CHECK(frame.size() == 45);

    PmControlValue out;
    CHECK(msg.decode(frame, static_cast<void*>(&out)));
    CHECK(out.year == 2026 && out.month == 8 && out.day == 26);
    CHECK(out.hour == 17 && out.minute == 30 && out.second == 5);
    CHECK(out.millisecond10 == 3);
    CHECK(out.mode == 2 && out.cmd == 2 && out.outputPower == 120);
    CHECK(out.pitch == 35 && out.roll == -12);
    CHECK(out.depth == 200);
    CHECK(out.insBatCmd == 0x10 && out.dynBatCmd == 0x20 && out.dynBatPower == 300);
    CHECK(out.heartbeat == 11 && out.hostState == 0xAA);
    CHECK(out.reserved1 == 0x11223344 && out.reserved2 == 0x55667788);
}

//--------------------------------------------------------------------------
// 5. PM 状态报文编解码往返（抽查关键字段，覆盖各分组）
static void testPmStatusRoundTrip() {
    PmStatusValue v;
    v.fc_mode = 2; v.fc_status = 6;
    v.fault_level_1 = 1; v.fault_level_2 = 2; v.fault_level_3 = 3; v.fault_level_4 = 4;
    v.total_generation_time = 500; v.fc_fault_level = 0;
    v.output_power_limit = 30000; v.generation_power = 100;
    v.hydrogen_capacity = 80; v.liquid_oxygen_capacity = 70;
    v.main_pipe_pressure = 500; v.aux_pipe_pressure = 400;
    v.dcdc_out_voltage = 240; v.dcdc_out_current = 100;
    v.cabin_temp1 = 2500; v.cabin_temp2 = 2400;
    v.h2_concentration1 = 300; v.o2_concentration1 = 200;
    v.emergency_battery1_voltage = 24; v.emergency_battery2_voltage = 26;
    v.ins_soc = 60; v.dyn_soc = 55;
    v.ins_voltage_link = 4800; v.dyn_voltage_link = 4900;
    v.ins_current = 120; v.dyn_current = 130;
    v.device_online_flag1 = 0x0F; v.device_online_flag2 = 0x07;
    v.heartbeat = 42; v.emergency_cmd = 0x01;
    v.dyn_alarm_flag[0] = 0xAA; v.ins_alarm_flag[5] = 0x55;

    PmStatusMessage msg;
    std::vector<uint8_t> frame = msg.encode(v);
    CHECK(frame.size() == 248);

    PmStatusValue out;
    CHECK(msg.decode(frame, static_cast<void*>(&out)));
    CHECK(out.fc_mode == 2 && out.fc_status == 6);
    CHECK(out.fault_level_1 == 1 && out.fault_level_4 == 4);
    CHECK(out.total_generation_time == 500 && out.fc_fault_level == 0);
    CHECK(out.output_power_limit == 30000 && out.generation_power == 100);
    CHECK(out.hydrogen_capacity == 80 && out.liquid_oxygen_capacity == 70);
    CHECK(out.main_pipe_pressure == 500 && out.aux_pipe_pressure == 400);
    CHECK(out.dcdc_out_voltage == 240 && out.dcdc_out_current == 100);
    CHECK(out.cabin_temp1 == 2500 && out.h2_concentration1 == 300);
    CHECK(out.emergency_battery1_voltage == 24 && out.emergency_battery2_voltage == 26);
    CHECK(out.ins_soc == 60 && out.dyn_soc == 55);
    CHECK(out.ins_voltage_link == 4800 && out.dyn_voltage_link == 4900);
    CHECK(out.device_online_flag1 == 0x0F && out.device_online_flag2 == 0x07);
    CHECK(out.heartbeat == 42 && out.emergency_cmd == 0x01);
    CHECK(out.dyn_alarm_flag[0] == 0xAA && out.ins_alarm_flag[5] == 0x55);
}

//--------------------------------------------------------------------------
// 6. PM 校验和：正确帧通过，篡改字节校验失败
static void testChecksum() {
    PmControlValue v;
    v.mode = 2; v.cmd = 3; v.heartbeat = 1;

    PmControlMessage msg;
    std::vector<uint8_t> frame = msg.encode(v);
    PmControlValue tmp;
    CHECK(msg.decode(frame, static_cast<void*>(&tmp))); // 校验通过

    // 篡改数据域中间字节
    std::vector<uint8_t> bad = frame;
    bad[10] ^= 0xFF; // 数据域某字节
    CHECK(!msg.decode(bad, static_cast<void*>(&tmp)));

    // 篡改帧头长度
    std::vector<uint8_t> badLen = frame;
    badLen[4] = 0x01; // length 低字节改小 -> 0x012D != 45
    CHECK(!msg.decode(badLen, static_cast<void*>(&tmp)));
}

//--------------------------------------------------------------------------
// 7. 链路分发：FC 链路收到状态帧 -> 回调解码
static void testLinkDispatch() {
    // 注册表按链路隔离：FC 与 PM 共用 0x0001/0x0002 不应冲突
    MessageRegistry fcReg;
    registerFcMessages(fcReg);
    MessageRegistry pmReg;
    registerPmMessages(pmReg);

    CHECK(fcReg.size() == 2);
    CHECK(pmReg.size() == 4);
    CHECK(fcReg.find(0x0001)->id() == 0x0001);
    CHECK(pmReg.find(0x0001)->id() == 0x0001); // id 重叠但隔离

    // 用 LinkManager 的 handleIncoming 模拟收帧
    FcStatusValue fv;
    fv.fc_status = 6; fv.heartbeat = 8;
    FcStatusMessage fsMsg;
    std::vector<uint8_t> frame = fsMsg.encode(fv);

    LinkManager lm("test_fc", 0);
    registerFcMessages(lm.registry());

    bool got = false;
    lm.setOnMessage([&](Message* m, const std::vector<uint8_t>& f) {
        if (m && m->id() == 0x0002) {
            FcStatusValue out;
            if (m->decode(f, static_cast<void*>(&out))) {
                got = (out.fc_status == 6 && out.heartbeat == 8);
            }
        }
    });
    CHECK(lm.handleIncoming(frame));
    CHECK(got);
}

//--------------------------------------------------------------------------
// 8. 数据库落库与查询
static void testDbStore() {
    std::string path = "test_pccu.db";
    std::remove(path.c_str());
    {
        DbStore db(path);
        CHECK(db.open());

        std::vector<uint8_t> frame = {0x40,0x40,0x01,0x00,0x14,0x00, 1,2,3,4,5,6,7,8,9,10,11,12,13,14};
        db.onRawFrame(0, 0x0001, "fc", frame, true);
        db.onRawFrame(1, 0x0004, "pm", frame, false);

        CHECK(db.count() == 2);

        auto rows = db.queryRecent("", -1, 0, 10);
        CHECK(rows.size() == 2);
        CHECK(rows[0].msgId == 0x0004 || rows[0].msgId == 0x0001);
        CHECK(rows[0].checksumOk == 0); // 最近一条是 pm 的 false

        auto fcRows = db.queryRecent("fc", 0, 0, 10);
        CHECK(fcRows.size() == 1);
        CHECK(fcRows[0].msgId == 0x0001 && fcRows[0].direction == 0);

        db.close();
    }
    std::remove(path.c_str());
}

//--------------------------------------------------------------------------
// 9. 锂电池帧长度必须与协议文档一致（docs/锂电池协议20230324.docx）
static void testBatFrameLengths() {
    BatSelfCheckMessage bsc;
    BatControlMessage   bcm;
    BatStatusMessage    bsm;
    BatPackAlarmMessage bam;

    CHECK(bsc.totalLength() == 12);  // 自检指令：6+2+4
    CHECK(bcm.totalLength() == 27);  // 设备控制指令：6+17+4
    CHECK(bsm.totalLength() == 90);  // 电池组状态：6+80+4
    CHECK(bam.totalLength() == 78);  // 电池包报警：6+68+4
}

//--------------------------------------------------------------------------
// 10. 锂电池自检/控制指令编解码往返
static void testBatControlRoundTrip() {
    // 自检指令
    BatSelfCheckValue sc;
    sc.selfCheck = BAT_SC_START;
    sc.selfCheckReset = BAT_SCR_RESET;
    BatSelfCheckMessage scMsg;
    std::vector<uint8_t> scFrame = scMsg.encode(sc);
    CHECK(scFrame.size() == 12);
    CHECK(scFrame[0] == 0x40 && scFrame[1] == 0x40);
    CHECK(scFrame[2] == 0x00 && scFrame[3] == 0x00);  // id 0x0000 小端
    CHECK(scFrame[6] == 0x01 && scFrame[7] == 0x55);
    BatSelfCheckValue scOut;
    CHECK(scMsg.decode(scFrame, static_cast<void*>(&scOut)));
    CHECK(scOut.selfCheck == BAT_SC_START && scOut.selfCheckReset == BAT_SCR_RESET);

    // 设备控制指令
    BatControlValue v;
    v.year = 2026; v.month = 8; v.day = 30; v.hour = 11; v.minute = 20; v.second = 33;
    v.ms10 = 4;
    v.workCondition = BAT_WC_SEA_TRIAL;
    v.busContactor = BAT_CTR_CLOSE;
    v.posContactor = BAT_CTR_OPEN;
    v.diodeContactor = BAT_CTR_CLOSE;
    v.powerKw = 350;
    v.reserved = 0x1234;
    v.heartbeat = 66;

    BatControlMessage msg;
    std::vector<uint8_t> frame = msg.encode(v);
    CHECK(frame.size() == 27);
    CHECK(frame[2] == 0x01 && frame[3] == 0x00);       // id 0x0001 小端
    CHECK(frame[6 + 8] == BAT_WC_SEA_TRIAL);           // 工况
    CHECK(frame[6 + 9] == BAT_CTR_CLOSE);              // 母线接触器
    CHECK(frame[6 + 10] == BAT_CTR_OPEN);              // 正极接触器
    CHECK(frame[6 + 11] == BAT_CTR_CLOSE);             // 二极管接触器
    CHECK(frame[6 + 12] == 0x5E && frame[6 + 13] == 0x01); // 350 = 0x015E 小端
    CHECK(frame[6 + 14] == 0x34 && frame[6 + 15] == 0x12); // 预留 0x1234 小端
    CHECK(frame[6 + 16] == 66);                        // 心跳

    BatControlValue out;
    CHECK(msg.decode(frame, static_cast<void*>(&out)));
    CHECK(out.year == 2026 && out.month == 8 && out.day == 30);
    CHECK(out.hour == 11 && out.minute == 20 && out.second == 33 && out.ms10 == 4);
    CHECK(out.workCondition == BAT_WC_SEA_TRIAL);
    CHECK(out.busContactor == BAT_CTR_CLOSE);
    CHECK(out.posContactor == BAT_CTR_OPEN);
    CHECK(out.diodeContactor == BAT_CTR_CLOSE);
    CHECK(out.powerKw == 350);
    CHECK(out.reserved == 0x1234);
    CHECK(out.heartbeat == 66);
}

//--------------------------------------------------------------------------
// 11. 锂电池电池组状态(0x0003)编解码往返（关键字段抽查）
static void testBatStatusRoundTrip() {
    BatStatusValue v;
    v.year = 2026; v.month = 3; v.day = 24; v.hour = 10; v.minute = 0; v.second = 1;
    v.ms10 = 9;
    v.workCondition = BAT_WC_WORKSHOP;
    v.selfCheckState = BAT_SCST_OK;
    v.powerCfgState = 0x22;
    v.busContactorState = BAT_BUSST_CLOSED;
    v.posDiodeState = 0x32;      // 二极管闭合完成(3?) 高4位=3 断开完成; 低4位=2 正极闭合完成
    v.emergencyState = 0x1C;
    v.soc = 855;                 // 85.5%
    v.energy = 1234;             // 123.4 kWh
    v.maxDischargePower = 5000;  // 500.0 kW
    v.maxChargePower = 2000;
    v.currentAccessPower = 1500; // 150.0 kW
    v.packOnlineFlag = 0x00FFFFFF;
    v.packAccessFlag = 0x000000FF;
    v.relayPosCharge = 0x12;
    v.relayPreNeg = 0x11;
    v.voltageLoad = 5400;        // 54.00 V
    v.voltagePack = 5500;
    v.current = -200;            // -10 A（充电）
    v.insulationPos = 50;        // 500 kΩ
    v.insulationNeg = 60;
    v.masterTemp1 = 1; v.masterTemp2 = 2;
    v.packVoltageMid = 540;      // 54.0 V
    v.packVoltageMin = 535;
    v.packVoltageMinNo = 3;
    v.packVoltageMax = 545;
    v.packVoltageMaxNo = 7;
    v.packDeltaMax = 200;        // 20.0 mV
    v.packDeltaMaxNo = 5;
    v.packDeltaMaxVoltage = 5450;
    v.cellTempAvg = 65;          // 25 ℃
    v.cellTempMin = 55;
    v.cellTempMinNo = 2;
    v.cellTempMax = 70;
    v.cellTempMaxNo = 4;
    v.alarmFlag[0] = 0x42; v.alarmFlag[5] = 0xC1;
    v.alarmPosFlag = 0x00FF00AA;
    v.chargeStatus = 0x20;
    v.reserved = 0x5A5A;
    v.heartbeat = 88;

    BatStatusMessage msg;
    std::vector<uint8_t> frame = msg.encode(v);
    CHECK(frame.size() == 90);
    CHECK(frame[2] == 0x03 && frame[3] == 0x00);        // id 0x0003
    CHECK(frame[4] == 0x5A && frame[5] == 0x00);        // 域字节数=整包长度 90=0x005A
    CHECK(frame[6 + 9] == BAT_SCST_OK);                 // 自检状态 offset9
    CHECK(frame[6 + 11] == BAT_BUSST_CLOSED);           // 母线接触器状态 offset11
    CHECK(frame[6 + 12] == 0x32);                       // 正极/二极管 offset12
    CHECK(frame[6 + 14] == 0x57 && frame[6 + 15] == 0x03); // SOC 855=0x0357 小端
    CHECK(frame[6 + 40] == 0x38 && frame[6 + 41] == 0xFF); // current -200=0xFF38 小端
    CHECK(frame[6 + 79] == 88);                         // 心跳 offset79

    BatStatusValue out;
    CHECK(msg.decode(frame, static_cast<void*>(&out)));
    CHECK(out.year == 2026 && out.month == 3 && out.day == 24);
    CHECK(out.selfCheckState == BAT_SCST_OK);
    CHECK(out.powerCfgState == 0x22);
    CHECK(out.busContactorState == BAT_BUSST_CLOSED);
    CHECK(out.posDiodeState == 0x32);
    CHECK(batPosStateOf(out.posDiodeState) == BAT_POSST_CLOSED);
    CHECK(out.emergencyState == 0x1C);
    CHECK(out.soc == 855 && out.energy == 1234);
    CHECK(out.maxDischargePower == 5000 && out.maxChargePower == 2000);
    CHECK(out.currentAccessPower == 1500);
    CHECK(out.packOnlineFlag == 0x00FFFFFF && out.packAccessFlag == 0x000000FF);
    CHECK(out.relayPosCharge == 0x12 && out.relayPreNeg == 0x11);
    CHECK(out.voltageLoad == 5400 && out.voltagePack == 5500);
    CHECK(out.current == -200);
    CHECK(out.insulationPos == 50 && out.insulationNeg == 60);
    CHECK(out.packVoltageMid == 540 && out.packVoltageMin == 535 && out.packVoltageMinNo == 3);
    CHECK(out.packVoltageMax == 545 && out.packVoltageMaxNo == 7);
    CHECK(out.packDeltaMax == 200 && out.packDeltaMaxNo == 5 && out.packDeltaMaxVoltage == 5450);
    CHECK(out.cellTempAvg == 65 && out.cellTempMax == 70 && out.cellTempMaxNo == 4);
    CHECK(out.alarmFlag[0] == 0x42 && out.alarmFlag[5] == 0xC1);
    CHECK(out.alarmPosFlag == 0x00FF00AA);
    CHECK(out.chargeStatus == 0x20 && out.reserved == 0x5A5A);
    CHECK(out.heartbeat == 88);
}

//--------------------------------------------------------------------------
// 12. 锂电池电池包报警(0x0004)编解码往返
static void testBatPackAlarmRoundTrip() {
    BatPackAlarmValue v;
    v.year = 2026; v.month = 3; v.day = 24; v.hour = 9; v.minute = 1; v.second = 2;
    v.ms10 = 5;
    v.packNo = 12;
    v.alarmFlag[0] = 0x45; v.alarmFlag[3] = 0x82;
    v.soc = 700;              // 70.0%
    v.relayPosNeg = 0x12;     // 正极接通 + 负极断开
    v.voltageLoad = 530;      // 53.0 V
    v.voltagePack = 528;
    v.current = 400;          // 20 A（放电）
    v.insulationPos = 100;
    v.insulationNeg = 110;
    v.tempMaxNo = 6; v.tempMax1 = 75;
    v.tempMin1 = 50;
    v.tempAvg = 62;
    v.balanceState = 1;
    v.voltMaxNo = 9; v.voltMax1 = 41;   // 4.1 mV*10 => 0.1mV 精度
    v.voltMin1 = 33;
    v.voltMinNo = 11;
    v.voltAvg = 38;

    BatPackAlarmMessage msg;
    std::vector<uint8_t> frame = msg.encode(v);
    CHECK(frame.size() == 78);
    CHECK(frame[2] == 0x04 && frame[3] == 0x00);   // id 0x0004
    CHECK(frame[6 + 8] == 12);                     // 电池包号
    CHECK(frame[6 + 9] == 0x45);                   // 报警标识字1
    CHECK(frame[6 + 17] == 0x12);                  // 正极/负极继电器
    CHECK(frame[6 + 66] == 0x26 && frame[6 + 67] == 0x00); // 平均电压 38=0x0026 小端

    BatPackAlarmValue out;
    CHECK(msg.decode(frame, static_cast<void*>(&out)));
    CHECK(out.packNo == 12);
    CHECK(out.alarmFlag[0] == 0x45 && out.alarmFlag[3] == 0x82);
    CHECK(out.soc == 700);
    CHECK(out.relayPosNeg == 0x12);
    CHECK(out.voltageLoad == 530 && out.voltagePack == 528);
    CHECK(out.current == 400);
    CHECK(out.insulationPos == 100 && out.insulationNeg == 110);
    CHECK(out.tempMaxNo == 6 && out.tempMax1 == 75);
    CHECK(out.tempMin1 == 50 && out.tempAvg == 62);
    CHECK(out.balanceState == 1);
    CHECK(out.voltMaxNo == 9 && out.voltMax1 == 41);
    CHECK(out.voltMin1 == 33 && out.voltMinNo == 11);
    CHECK(out.voltAvg == 38);
}

//--------------------------------------------------------------------------
// 13. 锂电池链路分发与注册表隔离
static void testBatLinkDispatch() {
    MessageRegistry batReg;
    registerBatMessages(batReg);
    CHECK(batReg.size() == 4);
    CHECK(batReg.find(0x0000) != nullptr);
    CHECK(batReg.find(0x0001) != nullptr);
    CHECK(batReg.find(0x0003) != nullptr);
    CHECK(batReg.find(0x0004) != nullptr);

    // 锂电池链路收帧：0x0003 状态解码
    BatStatusValue v;
    v.soc = 999; v.heartbeat = 21;
    BatStatusMessage bsm;
    std::vector<uint8_t> frame = bsm.encode(v);

    BatLinkManager blm(BatRole::Dyn, 0, "192.168.100.137", 7000);
    CHECK(blm.linkName() == "bat_dyn");

    bool got = false;
    blm.setOnMessage([&](Message* m, const std::vector<uint8_t>& f) {
        if (m && m->id() == 0x0003) {
            BatStatusValue out;
            if (m->decode(f, static_cast<void*>(&out))) {
                got = (out.soc == 999 && out.heartbeat == 21);
            }
        }
    });
    CHECK(blm.handleIncoming(frame));
    CHECK(got);

    // 校验失败帧拒收
    std::vector<uint8_t> bad = frame;
    bad[10] ^= 0xFF;
    CHECK(!blm.handleIncoming(bad));
}

//--------------------------------------------------------------------------
int main() {
    testFrameLengths();
    testFcControlRoundTrip();
    testFcStatusRoundTrip();
    testPmControlRoundTrip();
    testPmStatusRoundTrip();
    testChecksum();
    testLinkDispatch();
    testDbStore();
    testBatFrameLengths();
    testBatControlRoundTrip();
    testBatStatusRoundTrip();
    testBatPackAlarmRoundTrip();
    testBatLinkDispatch();

    std::printf("\n==== pccuTest: %d passed, %d failed ====\n", g_pass, g_fail);
    return g_fail == 0 ? 0 : 1;
}