// --------------------------------------------------------------------------
//                   OpenMS -- Open-Source Mass Spectrometry
// --------------------------------------------------------------------------
// Copyright The OpenMS Team -- Eberhard Karls University Tuebingen,
// ETH Zurich, and Freie Universitaet Berlin 2002-2017.
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// --------------------------------------------------------------------------
// $Maintainer: Chris Bielow$
// $Authors: Stephan Aiche, Chris Bielow$
// --------------------------------------------------------------------------

#ifndef OPENMS_SIMULATION_IONIZATIONSIMULATION_H
#define OPENMS_SIMULATION_IONIZATIONSIMULATION_H

#include <OpenMS/CONCEPT/ProgressLogger.h>
#include <OpenMS/DATASTRUCTURES/DefaultParamHandler.h>
#include <OpenMS/DATASTRUCTURES/Adduct.h>
#include <OpenMS/SIMULATION/SimTypes.h>
#include <OpenMS/KERNEL/ConsensusMap.h>

// STL includes
#include <set>

namespace OpenMS
{

  /**
    @brief Simulates Protein ionization

    Supports ESI and MALDI. The abundance values are distributed among
    the charge states based on a binomial distribution for the ESI and
    based on discrete distribution for MALDI.
    In ESI mode, this class also supports different adduct types in addition to H+
    (e.g. NH4+, K+) which can be specified by the user and influence
    the mass and induce more charge variation.

    @htmlinclude OpenMS_IonizationSimulation.parameters

    @ingroup Simulation
  */
  class OPENMS_DLLAPI IonizationSimulation :
    public DefaultParamHandler,
    public ProgressLogger
  {

public:
    /// possible ionization methods
    typedef enum
    {
      MALDI,
      ESI
    } IonizationType;

    /// Default constructor
    IonizationSimulation();

    /** @name Constructors and Destructors
      */
    //@{
    ///
    explicit IonizationSimulation(SimTypes::MutableSimRandomNumberGeneratorPtr);

    /// Copy constructor
    IonizationSimulation(const IonizationSimulation& source);

    /// Destructor
    virtual ~IonizationSimulation();
    //@}

    /// Assignment operator
    IonizationSimulation& operator=(const IonizationSimulation& source);

    /**
      @brief Ionize all peptide features inside the Feature-Map

      Depending on the parameters the passed peptide features are ionized by MALDI
      or by ESI.

      @param features FeatureMap which will be ionized
      @param charge_consensus ConsensusMap which groups children(=charge variants) of input-features
      @param experiment SimTypes::MSSimExperiment map which contains the simulated experiment
     */
    void ionize(SimTypes::FeatureMapSim& features, ConsensusMap& charge_consensus, SimTypes::MSSimExperiment& experiment);

private:
    class CompareCmpByEF_;

    /// ionize using ESI
    void ionizeEsi_(SimTypes::FeatureMapSim&, ConsensusMap& charge_consensus);

    /// ionize using MALDI
    void ionizeMaldi_(SimTypes::FeatureMapSim&, ConsensusMap& charge_consensus);

    /// check if feature is within mz bounds of detector
    inline bool isFeatureValid_(const Feature& feature);

    /// set meta values, mz etc after adducts are ready
    void setFeatureProperties_(Feature& f,
                               const double& adduct_mass,
                               const String& adduct_formula,
                               const SimTypes::SimChargeType charge,
                               const SimTypes::SimIntensityType new_intensity,
                               const Size parent_index);

    /// set defaults
    void setDefaultParams_();

    /// Synchronize members with param class
    void updateMembers_();

    /**
     @brief counts all basic residues inside the amino acid sequence to give an upper bound on the maximal charge during ESI ionization

     The N-term contributes +1 always. All other ionizable residues (according to param "esi:ionized_residues") in the sequence are summed up.
    */
    UInt countIonizedResidues_(const AASequence&) const;


    // Members //

    /// ESI or MALDI ionization
    IonizationType ionization_type_;

    /*
 @brief List of residues that are counted as basic during execution of countBasicResidues_
*/
    std::set<String> basic_residues_;

    /**
     @brief Probability for the binomial distribution of ESI charge states
     */
    double esi_probability_;

    /**
     @brief Discrete distribution of impure charge adducts like Na+, K+, Ca++ etc besides the usual H+
    */
    std::vector<double> esi_impurity_probabilities_;


    /**
     @brief Corresponding table to @p esi_impurity_probabilities_ holding the actual element and its charge
    */
    Adduct::AdductsType esi_adducts_;

    /**
     @brief Maximal charge that any impure adduct from parameter list has
    */
    Size max_adduct_charge_;

    /**
     @brief Preprocessed table of discrete distribution (MALDI charges)
    */
    std::vector<double> maldi_probabilities_;

    /// Maximum m/z detected by mass analyser
    SimTypes::SimCoordinateType maximal_mz_measurement_limit_;
    /// Minimum m/z detected by mass analyser
    SimTypes::SimCoordinateType minimal_mz_measurement_limit_;

protected:
    /// Random number generator
    SimTypes::MutableSimRandomNumberGeneratorPtr rnd_gen_;
  };

}

#endif // OPENMS_SIMULATION_IONIZATIONSIMULATION_H

