//
// Minimal measurement implementation - header only version to verify logic
// This file contains the complete measurement logic without compilation dependencies
//

#pragma once
#include <vector>
#include <cstdint>

// 避免包含复杂的依赖，只提供核心逻辑
namespace nr::gnb::measurement
{

// 测量数据结构
struct CellMeasurement {
    int pci;
    int rsrp; // dBm
    int rsrq; // dB
};

struct UeMeasurementData {
    int ueId;
    CellMeasurement serving;
    std::vector<CellMeasurement> neighbors;
    int64_t lastUpdateTime;
};

// 核心逻辑函数
class HandoverDecisionEngine 
{
public:
    static constexpr int HO_THRESHOLD_DB = 8;
    
    // 生成模拟测量数据
    static UeMeasurementData generateSimulatedMeasurement(int ueId)
    {
        UeMeasurementData data;
        data.ueId = ueId;
        data.lastUpdateTime = 0;
        
        // 模拟服务小区测量值
        data.serving.pci = 1;
        data.serving.rsrp = -95 + (ueId % 20);
        data.serving.rsrq = -10 + (ueId % 7);
        
        // 模拟邻区测量值
        CellMeasurement neighbor1;
        neighbor1.pci = 2;
        neighbor1.rsrp = -100 + ((ueId * 3) % 30);
        neighbor1.rsrq = -12 + ((ueId * 2) % 9);
        
        data.neighbors.push_back(neighbor1);
        return data;
    }
    
    // 切换判决算法
    static bool shouldTriggerHandover(const UeMeasurementData &measurement, int &targetGnbId)
    {
        int bestNeighborRsrp = measurement.serving.rsrp;
        int bestNeighborPci = -1;
        
        // 找到最强的邻区
        for (const auto &neighbor : measurement.neighbors)
        {
            if (neighbor.rsrp > bestNeighborRsrp)
            {
                bestNeighborRsrp = neighbor.rsrp;
                bestNeighborPci = neighbor.pci;
            }
        }
        
        // 判断是否达到切换阈值
        if (bestNeighborPci != -1 && 
            (bestNeighborRsrp - measurement.serving.rsrp) >= HO_THRESHOLD_DB)
        {
            targetGnbId = mapPciToGnbId(bestNeighborPci);
            return targetGnbId != -1;
        }
        
        return false;
    }
    
    // PCI到gNB ID的映射
    static int mapPciToGnbId(int pci)
    {
        switch (pci)
        {
            case 2: return 2;
            case 3: return 3;
            default: return -1;
        }
    }
};

} // namespace nr::gnb::measurement
