lms_definition.h

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#pragma once
#include "HealthGPS.Core/forward_type.h"
#include "weight_category.h"
 
#include <map>
#include <stdexcept>
 
namespace hgps {
 
struct LmsRecord {
    double lambda{};
 
    double mu{};
 
    double sigma{};
};
 
using LmsDataset = std::map<unsigned int, std::map<core::Gender, LmsRecord>>;
 
class LmsDefinition {
  public:
    LmsDefinition() = default;
 
    LmsDefinition(LmsDataset &&dataset) : table_{std::move(dataset)} {
 
        if (table_.empty()) {
            throw std::invalid_argument("The LMS definition must not be empty.");
        }
    }
 
    bool empty() const noexcept { return table_.empty(); }
 
    std::size_t size() const noexcept { return table_.size(); }
 
    unsigned int min_age() const noexcept { return table_.cbegin()->first; }
 
    unsigned int max_age() const noexcept { return table_.rbegin()->first; }
 
    bool contains(unsigned int age, core::Gender gender) const noexcept {
        if (table_.contains(age)) {
            return table_.at(age).contains(gender);
        }
 
        return false;
    }
 
    const LmsRecord &at(unsigned int age, core::Gender gender) const {
        return table_.at(age).at(gender);
    }
 
  private:
    LmsDataset table_{};
};
} // namespace hgps