/*
 *  Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
 *  Copyright (C) 2011 - Scilab Enterprises - Clement DAVID
 *
 *  This file must be used under the terms of the CeCILL.
 *  This source file is licensed as described in the file COPYING, which
 *  you should have received as part of this distribution.  The terms
 *  are also available at
 *  http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
 *
 */

#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#include "dynlib_scicos_blocks.h"
#include "scoUtils.h"

#include "MALLOC.h"
#include "elementary_functions.h"

#include "getGraphicObjectProperty.h"
#include "setGraphicObjectProperty.h"
#include "graphicObjectProperties.h"
#include "createGraphicObject.h"

#include "CurrentFigure.h"

#include "scicos_block4.h"
#include "scicos.h"

#include "localization.h"
#ifdef _MSC_VER
#include "strdup_windows.h"
#endif

#include "FigureList.h"
#include "BuildObjects.h"
#include "AxesModel.h"

/*****************************************************************************
 * Internal container structure
 ****************************************************************************/

/**
 * Container structure
 */
typedef struct
{
    struct
    {
        int numberOfPoints;
        int maxNumberOfPoints;
        double **coordinates;
    } internal;

    struct
    {
        int cachedFigureUID;
        int cachedAxeUID;
        int *cachedPolylinesUIDs;
    } scope;
} sco_data;

/**
 * Get (and allocate on demand) the internal data used on this scope
 * \param block the block
 * \return the scope data
 */
static sco_data *getScoData(scicos_block * block);

/**
 * Release any internal data
 *
 * \param block the block
 */
static void freeScoData(scicos_block * block);

/**
 * Append the data to the current data
 *
 * \param block the block
 * \param x x data
 * \param y y data
 */
static void appendData(scicos_block * block, double *x, double *y);

/**
 * Push the block data to the polyline
 *
 * \param block the block
 * \param row the selected row
 *
 */
static BOOL pushData(scicos_block * block, int row);

/*****************************************************************************
 * Graphics utils
 ****************************************************************************/

/**
 * Get (and allocate on demand) the figure associated with the block
 * \param block the block
 * \return a valid figure UID or NULL on error
 */
static int getFigure(scicos_block * block);

/**
 * Get (and allocate on demand) the axe associated with the input
 *
 * \param iFigureUID the parent figure UID
 * \param block the block
 * \param input the current input index (0-indexed)
 * \return a valid axe UID or NULL on error
 */
static int getAxe(int iFigureUID, scicos_block * block);

/**
 * Get (and allocate on demand) the polyline associated with the row
 *
 * \param iAxeUID the parent axe UID
 * \param block the block
 * \param row the current row index (0-indexed)
 * \return a valid polyline UID or NULL on error
 */
static int getPolyline(int iAxeUID, scicos_block * block, int row);

/**
 * Set the polylines bounds
 *
 * \param block the block
 */
static BOOL setPolylinesBounds(scicos_block * block);

/*****************************************************************************
 * Simulation function
 ****************************************************************************/

/** \fn void cmscope(scicos_block * block,int flag)
    \brief the computational function
    \param block A pointer to a scicos_block
    \param flag An int which indicates the state of the block (init, update, ending)
*/
SCICOS_BLOCKS_IMPEXP void cscopxy(scicos_block * block, scicos_flag flag)
{
    int iFigureUID;
    int j;
    sco_data *sco;
    BOOL result;

    // Define file pointer to write data to a log file which can used for output generation to the client
    FILE* filePointer;
    int processId;
    char fileName[25];
    char line[100];

    filePointer = NULL;
    processId = 0;
    // Get the process id to give a unique name to the requested simulation
	processId = getpid(); // On Linux
	sprintf(fileName, "scilab-log-%d.txt", processId); 
    // Open file in append mode
	filePointer = fopen(fileName, "a");
    // Give block id to distinguish blocks
	int block_id=4;

    switch (flag)
    {

        case Initialization:
            sco = getScoData(block);
            if (sco == NULL)
            {
                set_block_error(-5);
            }
            iFigureUID = getFigure(block);
            if (iFigureUID == 0)
            {
                // allocation error
                set_block_error(-5);
            }

    		// Write data to define Initialization phase
            fprintf(filePointer, "%d || Initialization %d\n", processId, iFigureUID);

            break;

        case StateUpdate:
            iFigureUID = getFigure(block);
            if (iFigureUID == 0)
            {
                // allocation error
                set_block_error(-5);
                break;
            }

            double *x =  GetRealInPortPtrs(block, 1);
            double *y = GetRealInPortPtrs(block, 2);
            appendData(block,x, y);
            for (j = 0; j < block->insz[0]; j++)
            {
     	
                // Store parameters required to generate output on the web
                int iFigureUID = getFigure(block);
                int iAxeUID = getAxe(iFigureUID, block);
                int iPolylineUID = getPolyline(iAxeUID, block, j);
                double z = 0;

                // Store scilab's plotted data in the log file 
                fprintf(filePointer, "%d %d || %d | %d | %d || %f %f %f %d %f %f %f %f %s\n", block_id, processId, iFigureUID, iAxeUID, iPolylineUID, x[j], y[j], z, 1, block->rpar[0], block->rpar[1], block->rpar[2], block->rpar[3], "CSCOPXY"); 
                /*
                block_id - block_id of this block, process_id - process id of currently running scilab's instance, iFigureUID - figure id of graph generated,
                iAxeUID - axes id of graph, iPolylineUID - id for each separate output line of graph, x[j]- value of x-axis for j,
                y[j] - value of y-axis for j, z - value of z-axis(0 for 2d-graph), 1 - representing 1 output graph, block->rpar[0] - xMin value, 
                block->rpar[1] - xMax value, block->rpar[2] - yMin value, block->rpar[3] - yMax value
                */

                result = pushData(block, j);
                if (result == FALSE)
                {
                    Coserror("%s: unable to push some data.", "cscopxy");
                    break;
                }
            }
            break;

        case Ending:
            // Write data to define Ending phase
            fprintf(filePointer, "%d || Ending %d\n", processId, getFigure(block));

            freeScoData(block);
            break;

        default:
            break;
    }
    // Close the file pointer
    fclose(filePointer);
}

/*-------------------------------------------------------------------------*/

/*****************************************************************************
 *
 * Container management
 *
 ****************************************************************************/

    static sco_data *getScoData(scicos_block * block)
    {
        sco_data *sco = (sco_data *) * (block->work);
        int i, j;

        if (sco == NULL)
        {
        /*
         * Data allocation
         */

            sco = (sco_data *) MALLOC(sizeof(sco_data));
            if (sco == NULL)
            {
                goto error_handler_sco;
            }

            sco->internal.numberOfPoints = 0;
            sco->internal.maxNumberOfPoints = block->ipar[2];

            sco->internal.coordinates = (double **)CALLOC(block->insz[0], sizeof(double *));
            if (sco->internal.coordinates == NULL)
            {
                goto error_handler_coordinates;
            }

            for (i = 0; i < block->insz[0]; i++)
            {
                sco->internal.coordinates[i] = (double *)CALLOC(3 * block->ipar[2], sizeof(double));
                if (sco->internal.coordinates[i] == NULL)
                {
                    goto error_handler_coordinates_i;
                }
            }

            sco->scope.cachedFigureUID = 0;
            sco->scope.cachedAxeUID = 0;

            sco->scope.cachedPolylinesUIDs = (int*)CALLOC(block->insz[0], sizeof(int));

            *(block->work) = sco;
        }

        return sco;

    /*
     * Error management (out of normal flow)
     */

        error_handler_coordinates_i:
        for (j = 0; j < i; j++)
        {
            FREE(sco->internal.coordinates[i]);
        }
        FREE(sco->internal.coordinates);
        error_handler_coordinates:
        FREE(sco);
        error_handler_sco:
    // allocation error
        set_block_error(-5);
        return NULL;
    }

    static void freeScoData(scicos_block * block)
    {
        sco_data *sco = (sco_data *) * (block->work);
        int i;

        if (sco != NULL)
        {
            for (i = 0; i < block->insz[0]; i++)
            {
                FREE(sco->internal.coordinates[i]);
            }

            FREE(sco->internal.coordinates);
            FREE(sco->scope.cachedPolylinesUIDs);
            FREE(sco);
            *(block->work) = NULL;
        }
    }

    static sco_data *reallocScoData(scicos_block * block, int numberOfPoints)
    {
        sco_data *sco = (sco_data *) * (block->work);
        int i;

        double *ptr;
        int setLen;
        int previousNumberOfPoints = sco->internal.maxNumberOfPoints;
        int newPoints = numberOfPoints - previousNumberOfPoints;

        for (i = 0; i < block->insz[0]; i++)
        {
            ptr = (double *)REALLOC(sco->internal.coordinates[i], 3 * numberOfPoints * sizeof(double));
            if (ptr == NULL)
            {
                goto error_handler;
            }

        // clear the last points, the Z-axis values
            memset(ptr + 2 * numberOfPoints, 0, numberOfPoints * sizeof(double));

        // memcpy existing Y-axis values (use memmove to handle memory overlapping)
            memmove(ptr + numberOfPoints, ptr + previousNumberOfPoints, previousNumberOfPoints * sizeof(double));

        // then set the last points to the last values for Y-axis and X-axis values
            for (setLen = newPoints - 1; setLen >= 0; setLen--)
            {
                ptr[numberOfPoints + previousNumberOfPoints + setLen] = ptr[numberOfPoints + previousNumberOfPoints - 1];
            }
            for (setLen = newPoints - 1; setLen >= 0; setLen--)
            {
                ptr[previousNumberOfPoints + setLen] = ptr[previousNumberOfPoints - 1];
            }

            sco->internal.coordinates[i] = ptr;
        }

        sco->internal.maxNumberOfPoints = numberOfPoints;
        return sco;

        error_handler:
        freeScoData(block);
    // allocation error
        set_block_error(-5);
        return NULL;
    }

    static void appendData(scicos_block * block, double *x, double *y)
    {
        int i;

        sco_data *sco = (sco_data *) * (block->work);
        int maxNumberOfPoints = sco->internal.maxNumberOfPoints;
        int numberOfPoints = sco->internal.numberOfPoints;

    /*
     * Handle the case where the scope has more points than maxNumberOfPoints
     */
        if (sco != NULL && numberOfPoints >= maxNumberOfPoints)
        {
        // on a full scope, re-alloc
            maxNumberOfPoints = maxNumberOfPoints + block->ipar[2];
            sco = reallocScoData(block, maxNumberOfPoints);
        }

    /*
     * Update data
     */
        if (sco != NULL)
        {
            int setLen;

            for (i = 0; i < block->insz[0]; i++)
            {
                for (setLen = maxNumberOfPoints - numberOfPoints - 1; setLen >= 0; setLen--)
                {
                    sco->internal.coordinates[i][numberOfPoints + setLen] = x[i];
                }

                for (setLen = maxNumberOfPoints - numberOfPoints - 1; setLen >= 0; setLen--)
                {
                    sco->internal.coordinates[i][maxNumberOfPoints + numberOfPoints + setLen] = y[i];
                }
            }

            sco->internal.numberOfPoints++;
        }
    }

    static BOOL pushData(scicos_block * block, int row)
    {
        int iFigureUID;
        int iAxeUID;
        int iPolylineUID;

        double *coordinates;
        sco_data *sco;

        iFigureUID = getFigure(block);
        iAxeUID = getAxe(iFigureUID, block);
        iPolylineUID = getPolyline(iAxeUID, block, row);

        sco = getScoData(block);
        if (sco == NULL)
        {
            return FALSE;
        }

    // select the right row
        coordinates = sco->internal.coordinates[row];

        return setGraphicObjectProperty(iPolylineUID, __GO_DATA_MODEL_COORDINATES__, coordinates, jni_double_vector, sco->internal.maxNumberOfPoints);
    }

/*****************************************************************************
 *
 * Graphic utils
 *
 ****************************************************************************/

/**
 * Set properties on the figure.
 *
 * \param iFigureUID the figure uid
 * \param block the current block
 */
    static void setFigureSettings(int iFigureUID, scicos_block * block)
    {
        int win_pos[2];
        int win_dim[2];

        int *ipar = block->ipar;

        win_pos[0] = ipar[6];
        win_pos[1] = ipar[7];
        win_dim[0] = ipar[8];
        win_dim[1] = ipar[9];

        if (win_pos[0] > 0 && win_pos[1] > 0)
        {
            setGraphicObjectProperty(iFigureUID, __GO_POSITION__, &win_pos, jni_int_vector, 2);
        }

        if (win_dim[0] > 0 && win_dim[1] > 0)
        {
            setGraphicObjectProperty(iFigureUID, __GO_SIZE__, &win_dim, jni_int_vector, 2);
        }
    };

/*****************************************************************************
 *
 * Graphic
 *
 ****************************************************************************/

    static int getFigure(scicos_block * block)
    {
        signed int figNum;
        int iFigureUID = 0;
        int iAxe = 0;
        int i__1 = 1;
        sco_data *sco = (sco_data *) * (block->work);

    // assert the sco is not NULL
        if (sco == NULL)
        {
            return 0;
        }

    // fast path for an existing object
        if (sco->scope.cachedFigureUID)
        {
            return sco->scope.cachedFigureUID;
        }

        figNum = block->ipar[0];

    // with a negative id, use the block number indexed from a constant.
        if (figNum < 0)
        {
            figNum = 20000 + get_block_number();
        }

        iFigureUID = getFigureFromIndex(figNum);
    // create on demand
        if (iFigureUID == 0)
        {
            iFigureUID = createNewFigureWithAxes();
            setGraphicObjectProperty(iFigureUID, __GO_ID__, &figNum, jni_int, 1);

        // the stored uid is a reference to the figure map, not to the current figure
            iFigureUID = getFigureFromIndex(figNum);
            sco->scope.cachedFigureUID = iFigureUID;

        // set configured parameters
            setFigureSettings(iFigureUID, block);

        // allocate the axes through the getter
            iAxe = getAxe(iFigureUID, block);

        /*
         * Setup according to block settings
         */
            setLabel(iAxe, __GO_X_AXIS_LABEL__, "x");
            setLabel(iAxe, __GO_Y_AXIS_LABEL__, "y");

            setGraphicObjectProperty(iAxe, __GO_X_AXIS_VISIBLE__, &i__1, jni_bool, 1);
            setGraphicObjectProperty(iAxe, __GO_Y_AXIS_VISIBLE__, &i__1, jni_bool, 1);

            setPolylinesBounds(block);
        }

        if (sco->scope.cachedFigureUID == 0)
        {
            sco->scope.cachedFigureUID = iFigureUID;
        }
        return iFigureUID;
    }

    static int getAxe(int iFigureUID, scicos_block * block)
    {
        int iAxe;
        int i;
        sco_data *sco = (sco_data *) * (block->work);

    // assert the sco is not NULL
        if (sco == NULL)
        {
            return 0;
        }

    // fast path for an existing object
        if (sco->scope.cachedAxeUID)
        {
            return sco->scope.cachedAxeUID;
        }

        iAxe = findChildWithKindAt(iFigureUID, __GO_AXES__, 0);

    /*
     * Allocate if necessary
     */
        if (iAxe == 0)
        {
            cloneAxesModel(iFigureUID);
            iAxe = findChildWithKindAt(iFigureUID, __GO_AXES__, 0);
        }

    /*
     * Setup on first access
     */
        if (iAxe != 0)
        {
        // allocate the polylines through the getter
            for (i = 0; i < block->insz[0]; i++)
            {
                getPolyline(iAxe, block, i);
            }
        }
        else
        {
            return 0;
        }

    /*
     * then cache with local storage
     */
        sco->scope.cachedAxeUID = iAxe;
        return sco->scope.cachedAxeUID;
    }

    static int getPolyline(int iAxeUID, scicos_block * block, int row)
    {
        int iPolyline;
        BOOL b__true = TRUE;

        int color;
        int markSize;
        double lineThickness;

        sco_data *sco = (sco_data *) * (block->work);

    // assert the sco is not NULL
        if (sco == NULL || sco->scope.cachedPolylinesUIDs == NULL)
        {
            return 0;
        }

    // fast path for an existing object
        if (sco->scope.cachedPolylinesUIDs[row])
        {
            return sco->scope.cachedPolylinesUIDs[row];
        }

        iPolyline = findChildWithKindAt(iAxeUID, __GO_POLYLINE__, row);

    /*
     * Allocate if necessary
     */
        if (iPolyline == 0)
        {
            iPolyline = createGraphicObject(__GO_POLYLINE__);

            if (iPolyline != 0)
            {
                createDataObject(iPolyline, __GO_POLYLINE__);
                setGraphicObjectRelationship(iAxeUID, iPolyline);
            }
            else
            {
                return 0;
            }
        }

    /*
     * Setup on first access
     */

    /*
     * Default setup of the nGons property
     */
        {
            int nGons = 1;
            setGraphicObjectProperty(iPolyline, __GO_DATA_MODEL_NUM_GONS__, &nGons, jni_int, 1);
        }

        color = block->ipar[3];
        markSize = block->ipar[4];
        lineThickness = (double)markSize;
        if (color > 0)
        {
            setGraphicObjectProperty(iPolyline, __GO_LINE_MODE__, &b__true, jni_bool, 1);

            setGraphicObjectProperty(iPolyline, __GO_LINE_COLOR__, &color, jni_int, 1);
            setGraphicObjectProperty(iPolyline, __GO_LINE_THICKNESS__, &lineThickness, jni_double, 1);
        }
        else
        {
            color = -color;
            setGraphicObjectProperty(iPolyline, __GO_MARK_MODE__, &b__true, jni_bool, 1);

            setGraphicObjectProperty(iPolyline, __GO_MARK_STYLE__, &color, jni_int, 1);
            setGraphicObjectProperty(iPolyline, __GO_MARK_SIZE__, &markSize, jni_int, 1);
        }

        {
        int iClipState = 1; //on
        setGraphicObjectProperty(iPolyline, __GO_CLIP_STATE__, &iClipState, jni_int, 1);
    }

    /*
     * then cache with local storage
     */
    sco->scope.cachedPolylinesUIDs[row] = iPolyline;
    return sco->scope.cachedPolylinesUIDs[row];
}

static BOOL setPolylinesBounds(scicos_block * block)
{
    int iFigureUID;
    int iAxeUID;

    double dataBounds[6];

    dataBounds[0] = block->rpar[0]; // xMin
    dataBounds[1] = block->rpar[1]; // xMax
    dataBounds[2] = block->rpar[2]; // yMin
    dataBounds[3] = block->rpar[3]; // yMax
    dataBounds[4] = -1.0;       // zMin
    dataBounds[5] = 1.0;        // zMax

    iFigureUID = getFigure(block);
    iAxeUID = getAxe(iFigureUID, block);

    return setGraphicObjectProperty(iAxeUID, __GO_DATA_BOUNDS__, dataBounds, jni_double_vector, 6);
}