/*  Copyright (C) 2013 VATSIM Community / authors
 *  This Source Code Form is subject to the terms of the Mozilla Public
 *  License, v. 2.0. If a copy of the MPL was not distributed with this
 *  file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef BLACKMISC_AVIONAVSYSTEM_H
#define BLACKMISC_AVIONAVSYSTEM_H
#include "blackmisc/aviomodulator.h"

namespace BlackMisc
{
    namespace Aviation
    {

        /*!
         * \brief NAV system (radio navigation)
         */
        class CNavSystem : public CModulator<CNavSystem>
        {
        private:
            /*!
             * \brief Valid civil aviation frequency?
             * \param f
             * \return
             */
            bool isValidCivilNavigationFrequency(BlackMisc::PhysicalQuantities::CFrequency f) const
            {
                double fr = f.valueRounded(BlackMisc::PhysicalQuantities::CFrequencyUnit::MHz(), this->m_digits);
                return fr >= 108.0 && fr <= 117.95;
            }

            /*!
             * \brief Valid military aviation frequency?
             * \param f
             * \return
             */
            bool isValidMilitaryNavigationFrequency(BlackMisc::PhysicalQuantities::CFrequency f) const
            {
                double fr = f.valueRounded(BlackMisc::PhysicalQuantities::CFrequencyUnit::MHz(), this->m_digits);
                return fr >= 960.0 && fr <= 1215.0; // valid TACAN frequency
            }

            /*!
             * \brief Constructor
             * \param validate
             * \param name
             * \param activeFrequency
             * \param standbyFrequency
             * \param digits
             */
            CNavSystem(bool validate, const QString &name, const BlackMisc::PhysicalQuantities::CFrequency &activeFrequency, const BlackMisc::PhysicalQuantities::CFrequency &standbyFrequency, int digits = 3):
                CModulator(name, activeFrequency, standbyFrequency, digits)
            {
                this->validate(validate);
            }

        protected:
            /*!
             * \brief Are the set values valid / in range?
             * \return
             */
            bool validValues() const
            {
                if (this->isDefaultValue()) return true; // special case
                bool v =
                    (this->isValidCivilNavigationFrequency(this->getFrequencyActive()) ||
                     this->isValidMilitaryNavigationFrequency(this->getFrequencyActive())) &&
                    (this->isValidCivilNavigationFrequency(this->getFrequencyStandby()) ||
                     this->isValidMilitaryNavigationFrequency(this->getFrequencyStandby()));
                return v;
            }

            /*!
             * \brief Validate values by assert and exception
             * \param strict
             * \throws std::range_error
             * \remarks Cannot be virtual because used in constructor
             * \return
             */
            bool validate(bool strict = true) const
            {
                if (this->isDefaultValue()) return true;
                bool valid = this->validValues();
                if (!strict) return valid;
                Q_ASSERT_X(valid, "CModulator::validate", "illegal values");
                if (!valid) throw std::range_error("Illegal values in CModulator::validate");
                return true;
            }

        public:
            /*!
             * Default constructor
             */
            CNavSystem() : CModulator() {}

            /*!
             * \brief Copy constructor
             * \param other
             */
            CNavSystem(const CNavSystem &other) : CModulator(other) {}

            /*!
             * \brief Constructor
             * \param name
             * \param activeFrequency
             * \param standbyFrequency
             * \param digits
             */
            CNavSystem(const QString &name, const BlackMisc::PhysicalQuantities::CFrequency &activeFrequency, const BlackMisc::PhysicalQuantities::CFrequency &standbyFrequency, int digits = 3):
                CModulator(name, activeFrequency, standbyFrequency, digits)
            {
                this->validate(true);
            }

            /*!
             * \brief QVariant, required for DBus QVariant lists
             * \return
             */
            virtual QVariant toQVariant() const
            {
                return QVariant::fromValue(*this);
            }

            /*!
             * \brief Set active frequency
             * \param frequencyMHz
             */
            void setFrequencyActiveMHz(double frequencyMHz)
            {
                this->CModulator::setFrequencyActiveMHz(frequencyMHz);
                this->validate(true);
            }

            /*!
             * \brief Set standby frequency
             * \param frequencyMHz
             */
            void setFrequencyStandbyMHz(double frequencyMHz)
            {
                this->CModulator::setFrequencyStandbyMHz(frequencyMHz);
                this->validate(true);
            }

            /*!
             * \brief operator ==
             * \param other
             * \return
             */
            bool operator ==(const CNavSystem &other) const
            {
                return this->CModulator::operator ==(other);
            }

            /*!
             * \brief operator ==
             * \param other
             * \return
             */
            bool operator !=(const CNavSystem &other) const
            {
                return this->CModulator::operator !=(other);
            }

            /*!
             * Try to get a NAV unit with given name and frequency. Returns true in case an object
             * has been sucessfully created,otherwise returns a default object.
             * \param[out] o_navSystem
             * \param name
             * \param activeFrequencyMHz
             * \param standbyFrequencyMHz
             * \return
             */
            static bool tryGetNavSystem(CNavSystem &o_navSystem, const QString &name, double activeFrequencyMHz, double standbyFrequencyMHz = -1)
            {
                o_navSystem = CNavSystem(false, name, BlackMisc::PhysicalQuantities::CFrequency(activeFrequencyMHz, BlackMisc::PhysicalQuantities::CFrequencyUnit::MHz()), BlackMisc::PhysicalQuantities::CFrequency(standbyFrequencyMHz < 0 ? activeFrequencyMHz : standbyFrequencyMHz, BlackMisc::PhysicalQuantities::CFrequencyUnit::MHz()));
                bool s;
                if (!(s = o_navSystem.validate(false))) o_navSystem = CNavSystem(); // reset to default
                return s;
            }

            /*!
             * Try to get a NAV unit with given name and frequency. Returns true in case an object
             * has been sucessfully created, otherwise returns a default object.
             * \param[out] o_navSystem
             * \param name
             * \param activeFrequency
             * \param standbyFrequency
             * \return
             */
            static bool tryGetNavSystem(CNavSystem &o_navSystem, const QString &name, BlackMisc::PhysicalQuantities::CFrequency activeFrequency, BlackMisc::PhysicalQuantities::CFrequency standbyFrequency = CModulator::FrequencyNotSet())
            {
                o_navSystem = CNavSystem(false, name, activeFrequency, standbyFrequency);
                bool s;
                if (!(s = o_navSystem.validate(false))) o_navSystem = CNavSystem(); // reset to default
                return s;
            }

            /*!
             * \brief NAV1 unit
             * \param activeFrequencyMHz
             * \param standbyFrequencyMHz
             * \return
             */
            static CNavSystem getNav1System(double activeFrequencyMHz, double standbyFrequencyMHz = -1)
            {
                return CNavSystem(CModulator::NameNav1(), BlackMisc::PhysicalQuantities::CFrequency(activeFrequencyMHz, BlackMisc::PhysicalQuantities::CFrequencyUnit::MHz()), BlackMisc::PhysicalQuantities::CFrequency(standbyFrequencyMHz < 0 ? activeFrequencyMHz : standbyFrequencyMHz, BlackMisc::PhysicalQuantities::CFrequencyUnit::MHz()));
            }

            /*!
             * \brief NAV1 unit
             * \param activeFrequency
             * \param standbyFrequency
             * \return
             */
            static CNavSystem getNav1System(BlackMisc::PhysicalQuantities::CFrequency activeFrequency, BlackMisc::PhysicalQuantities::CFrequency standbyFrequency = CModulator::FrequencyNotSet())
            {
                return CNavSystem(CModulator::NameNav1(), activeFrequency, standbyFrequency ==  CModulator::FrequencyNotSet() ? activeFrequency : standbyFrequency);
            }

            /*!
             * \brief Try to get NAV unit
             * \param[out] o_navSystem
             * \param activeFrequencyMHz
             * \param standbyFrequencyMHz
             * \return
             */
            static bool tryGetNav1System(CNavSystem &o_navSystem, double activeFrequencyMHz, double standbyFrequencyMHz = -1)
            {
                return CNavSystem::tryGetNavSystem(o_navSystem, CModulator::NameNav1(), activeFrequencyMHz, standbyFrequencyMHz);
            }

            /*!
             * \brief Try to get NAV unit
             * \param[out] o_navSystem
             * \param activeFrequency
             * \param standbyFrequency
             * \return
             */
            static bool tryGetNav1System(CNavSystem &o_navSystem, BlackMisc::PhysicalQuantities::CFrequency activeFrequency, BlackMisc::PhysicalQuantities::CFrequency standbyFrequency = CModulator::FrequencyNotSet())
            {
                return CNavSystem::tryGetNavSystem(o_navSystem, CModulator::NameNav1(), activeFrequency, standbyFrequency);
            }

            /*!
             * \brief NAV2 unit
             * \param activeFrequencyMHz
             * \param standbyFrequencyMHz
             * \return
             */
            static CNavSystem getNav2System(double activeFrequencyMHz, double standbyFrequencyMHz = -1)
            {
                return CNavSystem(CModulator::NameNav2(), BlackMisc::PhysicalQuantities::CFrequency(activeFrequencyMHz, BlackMisc::PhysicalQuantities::CFrequencyUnit::MHz()), BlackMisc::PhysicalQuantities::CFrequency(standbyFrequencyMHz < 0 ? activeFrequencyMHz : standbyFrequencyMHz, BlackMisc::PhysicalQuantities::CFrequencyUnit::MHz()));
            }

            /*!
             * \brief NAV2 unit
             * \param activeFrequency
             * \param standbyFrequency
             * \return
             */
            static CNavSystem getNav2System(BlackMisc::PhysicalQuantities::CFrequency activeFrequency, BlackMisc::PhysicalQuantities::CFrequency standbyFrequency = CModulator::FrequencyNotSet())
            {
                return CNavSystem(CModulator::NameNav2(), activeFrequency, standbyFrequency ==  CModulator::FrequencyNotSet() ? activeFrequency : standbyFrequency);
            }

            /*!
             * \brief Try to get NAV unit
             * \param[out] o_navSystem
             * \param activeFrequencyMHz
             * \param standbyFrequencyMHz
             * \return
             */
            static bool tryGetNav2System(CNavSystem &o_navSystem, double activeFrequencyMHz, double standbyFrequencyMHz = -1)
            {
                return CNavSystem::tryGetNavSystem(o_navSystem, CModulator::NameNav2(), activeFrequencyMHz, standbyFrequencyMHz);
            }

            /*!
             * \brief Try to get NAV unit
             * \param[out] o_navSystem
             * \param activeFrequency
             * \param standbyFrequency
             * \return
             */
            static bool tryGetNav2System(CNavSystem &o_navSystem, BlackMisc::PhysicalQuantities::CFrequency activeFrequency, BlackMisc::PhysicalQuantities::CFrequency standbyFrequency = CModulator::FrequencyNotSet())
            {
                return CNavSystem::tryGetNavSystem(o_navSystem, CModulator::NameNav2(), activeFrequency, standbyFrequency);
            }
        };

    } // namespace
} // namespace

Q_DECLARE_METATYPE(BlackMisc::Aviation::CNavSystem)

#endif // BLACKMISC_AVIONAVSYSTEM_H