/*
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 */
#include "gmxpre.h"

#include "gromacs/fileio/oenv.h"

#include "gromacs/utility/enumerationhelpers.h"
#include "gromacs/utility/exceptions.h"
#include "gromacs/utility/programcontext.h"
#include "gromacs/utility/smalloc.h"
#include "gromacs/utility/stringutil.h"

struct gmx_output_env_t
{
    explicit gmx_output_env_t(const gmx::IProgramContext& context) :
        programContext(context),
        timeUnit(gmx::TimeUnit::Picoseconds),
        view(FALSE),
        xvgFormat(XvgFormat::None),
        verbosity(0),
        trajectory_io_verbosity(0)
    {
    }


    const gmx::IProgramContext& programContext;

    /* the time unit, enum defined in timeunitmanager.h */
    gmx::TimeUnit timeUnit;
    /* view of file requested */
    gmx_bool view;
    /* xvg output format, enum defined in oenv.h */
    XvgFormat xvgFormat;
    /* The level of verbosity for this program */
    int verbosity;
    /* The level of verbosity during trajectory I/O. Default=1, quiet=0. */
    int trajectory_io_verbosity;
};

/* The source code in this file should be thread-safe.
      Please keep it that way. */

/******************************************************************
 *
 *             T R A J E C T O R Y   S T U F F
 *
 ******************************************************************/

/* read only time names */
static const gmx::EnumerationArray<gmx::TimeUnit, real> c_picosecondsInTimeUnit = {
    { real(1e3), real(1), real(1e-3), real(1e-6), real(1e-9), real(1e-12) }
};
static const gmx::EnumerationArray<gmx::TimeUnit, real> c_timeUnitsInPicoseconds = {
    { real(1e-3), real(1), real(1e3), real(1e6), real(1e9), real(1e12) }
};
static const gmx::EnumerationArray<gmx::TimeUnit, const char*> c_timeUnitNames = {
    { "fs", "ps", "ns", "us", "ms", "s" }
};
static const gmx::EnumerationArray<gmx::TimeUnit, const char*> c_timeUnitNamesForXvgr = {
    { "fs", "ps", "ns", "\\mus", "ms", "s" }
};


/***** OUTPUT_ENV MEMBER FUNCTIONS ******/

void output_env_init(gmx_output_env_t**          oenvp,
                     const gmx::IProgramContext& context,
                     gmx::TimeUnit               tmu,
                     gmx_bool                    view,
                     XvgFormat                   xvgFormat,
                     int                         verbosity)
{
    try
    {
        gmx_output_env_t* oenv        = new gmx_output_env_t(context);
        *oenvp                        = oenv;
        oenv->timeUnit                = tmu;
        oenv->view                    = view;
        oenv->xvgFormat               = xvgFormat;
        oenv->verbosity               = verbosity;
        const char* env               = getenv("GMX_TRAJECTORY_IO_VERBOSITY");
        oenv->trajectory_io_verbosity = (env != nullptr ? strtol(env, nullptr, 10) : 1);
    }
    GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR
}

void output_env_init_default(gmx_output_env_t** oenvp)
{
    try
    {
        gmx_output_env_t* oenv = new gmx_output_env_t(gmx::getProgramContext());
        *oenvp                 = oenv;
    }
    GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR
}

void output_env_done(gmx_output_env_t* oenv)
{
    delete oenv;
}


int output_env_get_verbosity(const gmx_output_env_t* oenv)
{
    return oenv->verbosity;
}

int output_env_get_trajectory_io_verbosity(const gmx_output_env_t* oenv)
{
    return oenv->trajectory_io_verbosity;
}

std::string output_env_get_time_unit(const gmx_output_env_t* oenv)
{
    return c_timeUnitNames[oenv->timeUnit];
}

std::string output_env_get_time_label(const gmx_output_env_t* oenv)
{
    return gmx::formatString("Time (%s)", c_timeUnitNames[oenv->timeUnit]);
}

std::string output_env_get_xvgr_tlabel(const gmx_output_env_t* oenv)
{
    return gmx::formatString("Time (%s)", c_timeUnitNamesForXvgr[oenv->timeUnit]);
}

real output_env_get_time_factor(const gmx_output_env_t* oenv)
{
    return c_picosecondsInTimeUnit[oenv->timeUnit];
}

real output_env_get_time_invfactor(const gmx_output_env_t* oenv)
{
    return c_timeUnitsInPicoseconds[oenv->timeUnit];
}

real output_env_conv_time(const gmx_output_env_t* oenv, real time)
{
    return time * c_picosecondsInTimeUnit[oenv->timeUnit];
}

void output_env_conv_times(const gmx_output_env_t* oenv, int n, real* time)
{
    int    i;
    double fact = c_picosecondsInTimeUnit[oenv->timeUnit];

    if (fact != 1.)
    {
        for (i = 0; i < n; i++)
        {
            time[i] *= fact;
        }
    }
}

gmx_bool output_env_get_view(const gmx_output_env_t* oenv)
{
    return oenv->view;
}

XvgFormat output_env_get_xvg_format(const gmx_output_env_t* oenv)
{
    return oenv->xvgFormat;
}

const char* output_env_get_program_display_name(const gmx_output_env_t* oenv)
{
    const char* displayName = nullptr;

    try
    {
        displayName = oenv->programContext.displayName();
    }
    GMX_CATCH_ALL_AND_EXIT_WITH_FATAL_ERROR

    return displayName;
}

const gmx::IProgramContext& output_env_get_program_context(const gmx_output_env_t* oenv)
{
    return oenv->programContext;
}
