#ifndef WARPX_LaserParticleContainer_H_
#define WARPX_LaserParticleContainer_H_

#include <limits>

#include <WarpXParticleContainer.H>
#include <WarpXConst.H>
#include <WarpXParser.H>

enum class laser_t { Null, Gaussian, Harris, parse_field_function };

class LaserParticleContainer
    : public WarpXParticleContainer
{
public:
    LaserParticleContainer (amrex::AmrCore* amr_core, int ispecies, const std::string& name);
    virtual ~LaserParticleContainer () {}

    virtual void InitData () final;

#ifdef WARPX_DO_ELECTROSTATIC
    virtual void EvolveES (const amrex::Vector<std::array<std::unique_ptr<amrex::MultiFab>, 3> >& E,
                           amrex::Vector<std::unique_ptr<amrex::MultiFab> >& rho,
                           amrex::Real t, amrex::Real dt) { BL_ASSERT(false); }
#endif // WARPX_DO_ELECTROSTATIC

    virtual void Evolve (int lev,
                         const amrex::MultiFab&, const amrex::MultiFab&, const amrex::MultiFab&,
                         const amrex::MultiFab&, const amrex::MultiFab&, const amrex::MultiFab&,
                         amrex::MultiFab& jx, amrex::MultiFab& jy, amrex::MultiFab& jz,
                         amrex::MultiFab*, amrex::MultiFab*, amrex::MultiFab*,
                         amrex::MultiFab* rho, amrex::MultiFab* crho,
                         const amrex::MultiFab*, const amrex::MultiFab*, const amrex::MultiFab*,
                         const amrex::MultiFab*, const amrex::MultiFab*, const amrex::MultiFab*,
                         amrex::Real t, amrex::Real dt, DtType a_dt_type=DtType::Full) final;

    virtual void PushP (int lev, amrex::Real dt,
                        const amrex::MultiFab& ,
                        const amrex::MultiFab& ,
                        const amrex::MultiFab& ,
                        const amrex::MultiFab& ,
                        const amrex::MultiFab& ,
                        const amrex::MultiFab& ) final;

    virtual void PostRestart () final;

    void gaussian_laser_profile (const int np, amrex::Real const * AMREX_RESTRICT const Xp,
                                 amrex::Real const * AMREX_RESTRICT const Yp, amrex::Real t,
                                 amrex::Real * AMREX_RESTRICT const amplitude);

    void harris_laser_profile (const int np, amrex::Real const * AMREX_RESTRICT const Xp,
                               amrex::Real const * AMREX_RESTRICT const Yp, amrex::Real t,
                               amrex::Real * AMREX_RESTRICT const amplitude);

    void calculate_laser_plane_coordinates (const int np, const int thread_num,
                                            amrex::Real * AMREX_RESTRICT const pplane_Xp,
                                            amrex::Real * AMREX_RESTRICT const pplane_Yp);

    void update_laser_particle (const int np, amrex::ParticleReal * AMREX_RESTRICT const puxp,
                                amrex::ParticleReal * AMREX_RESTRICT const puyp,
                                amrex::ParticleReal * AMREX_RESTRICT const puzp,
                                amrex::ParticleReal const * AMREX_RESTRICT const pwp,
                                amrex::Real const * AMREX_RESTRICT const amplitude,
                                const amrex::Real dt, const int thread_num);

protected:

    std::string laser_name;

private:

    // runtime paramters
    laser_t                   profile     = laser_t::Null;
    amrex::Vector<amrex::Real> position;
    amrex::Vector<amrex::Real> nvec;
    amrex::Vector<amrex::Real> p_X;
    amrex::Vector<amrex::Real> stc_direction;

    long                      pusher_algo = -1;
    amrex::Real               e_max       = std::numeric_limits<amrex::Real>::quiet_NaN();
    amrex::Real               wavelength  = std::numeric_limits<amrex::Real>::quiet_NaN();
    amrex::Real               Z0_lab = 0; // Position of the antenna in the lab frame

    long min_particles_per_mode = 4;

    // computed using runtime parameters
    amrex::Vector<amrex::Real> p_Y;
    amrex::Vector<amrex::Real> u_X;
    amrex::Vector<amrex::Real> u_Y;
    amrex::Real weight   = std::numeric_limits<amrex::Real>::quiet_NaN();
    amrex::Real mobility = std::numeric_limits<amrex::Real>::quiet_NaN();

    // Gaussian profile
    amrex::Real profile_waist          = std::numeric_limits<amrex::Real>::quiet_NaN();
    amrex::Real profile_duration       = std::numeric_limits<amrex::Real>::quiet_NaN();
    amrex::Real profile_t_peak         = std::numeric_limits<amrex::Real>::quiet_NaN();
    amrex::Real profile_focal_distance = std::numeric_limits<amrex::Real>::quiet_NaN();
    amrex::Real zeta = 0.;
    amrex::Real beta = 0.;
    amrex::Real phi2 = 0.;
    amrex::Real theta_stc = 0.;

    // parse_field_function profile
    WarpXParser parser;
    std::string field_function;

    // laser particle domain
    amrex::RealBox laser_injection_box;
    // Theoretical position of the antenna. Used if do_continuous_injection=1.
    // Track the position of the antenna until it enters the simulation domain.
    amrex::Vector<amrex::Real> updated_position;

    void ComputeSpacing (int lev, amrex::Real& Sx, amrex::Real& Sy) const;
    void ComputeWeightMobility (amrex::Real Sx, amrex::Real Sy);
    void InitData (int lev);
    // Inject the laser antenna during the simulation, if it started
    // outside of the simulation domain and enters it.
    void ContinuousInjection(const amrex::RealBox& injection_box) override;
    // Update position of the antenna
    void UpdateContinuousInjectionPosition(amrex::Real dt) override;
};

#endif