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#include "global.h"

#include "environment.h"

#include "helper.h"

#include "csvfile.h"

#include "gisgrid.h"

#include "climate.h"

#include "speciesset.h"

/** Represents the physical simulation site with regard to climate, soil properties and such.

    Data is read from various sources and presented to the core model with a standardized interface.

*/

Environment::Environment()

{

    mInfile = 0;

    mGrid = 0;

    mGridMode = false;

    mCurrentSpeciesSet = 0;

    mCurrentClimate = 0;

    mCurrentID = 0;

}

Environment::~Environment()

{

    if (mInfile) {

        delete mInfile;

    }

    if (mGrid)

        delete mGrid;

}

bool Environment::loadFromFile(const QString &fileName)

{

    QString source = Helper::loadTextFile(GlobalSettings::instance()->path(fileName));

    if (source.isEmpty())

        throw IException(QString("Environment: input file does not exist or is empty (%1)").arg(fileName));

    return loadFromString(source);

}

// ******** specific keys *******

const QString speciesKey = "model.species.source";

const QString climateKey = "model.climate.tableName";

bool Environment::loadFromString(const QString &source)

{

    try {

        if (mInfile)

            delete mInfile;

        mInfile = new CSVFile();

        mInfile->loadFromString(source);

        mKeys = mInfile->captions();

        XmlHelper xml(GlobalSettings::instance()->settings());

        mSpeciesSets.clear(); // note: the objects are not destroyed - potential memory leak.

        mClimate.clear();

        mRowCoordinates.clear();

        mCreatedObjects.clear();

        int index;

        if (mGridMode) {

            int id = mInfile->columnIndex("id");

            if (id<0)

                throw IException("Environment:: (grid mode) input file has no 'id' column!");

            for (int row=0;row<mInfile->rowCount();row++) {

                mRowCoordinates[mInfile->value(row, id).toString()] = row;

            }

        } else {

            // ***  Matrix mode ******

            // each row must contain 'x' and 'y' coordinates

            // setup coordinates (x,y)

            int ix,iy;

            ix = mInfile->columnIndex("x");

            iy = mInfile->columnIndex("y");

            if (ix<0 || iy<0)

                throw IException("Environment:: (matrix mode) input file has no x/y coordinates!");

            for (int row=0;row<mInfile->rowCount();row++) {

                QString key=QString("%1_%2")

                        .arg(mInfile->value(row, ix).toString())

                        .arg(mInfile->value(row, iy).toString());

                mRowCoordinates[key] = row;

            }

        }

        // ******** setup of Species Sets *******

        if ((index = mKeys.indexOf(speciesKey))>-1) {

            DebugTimer t("environment:load species");

            QStringList speciesNames = mInfile->column(index);

            speciesNames.removeDuplicates();

            qDebug() << "creating species sets:" << speciesNames;

            foreach (const QString &name, speciesNames) {

                xml.setNodeValue(speciesKey,name); // set xml value

                // create species sets

                SpeciesSet *set = new SpeciesSet();

                mSpeciesSets.push_back(set);

                mCreatedObjects[name] = (void*)set;

                set->setup();

            }

            qDebug() << mSpeciesSets.count() << "species sets created.";

        } else {

            // no species sets specified

            SpeciesSet *speciesSet = new SpeciesSet();

            mSpeciesSets.push_back(speciesSet);

            speciesSet->setup();

            mCurrentSpeciesSet = speciesSet;

        }

        // ******** setup of Climate *******

        if ((index = mKeys.indexOf(climateKey))>-1) {

            DebugTimer t("environment:load climate");

            QStringList climateNames = mInfile->column(index);

            climateNames.removeDuplicates();

            qDebug() << "creating climatae: " << climateNames;

            foreach (QString name, climateNames) {

                xml.setNodeValue(climateKey,name); // set xml value

                // create climate sets

                Climate *climate = new Climate();

                mClimate.push_back(climate);

                mCreatedObjects[name]=(void*)climate;

                climate->setup();

            }

            qDebug() << mClimate.count() << "climates created";

        } else {

            // no climate defined - setup default climate

            Climate *c = new Climate();

            mClimate.push_back(c);

            c->setup();

            mCurrentClimate = c;

        }

        if (!mCurrentClimate && mClimate.count()>0)

            mCurrentClimate = mClimate[0];

        if (!mCurrentSpeciesSet && mSpeciesSets.count()>0)

            mCurrentSpeciesSet = mSpeciesSets[0];

        return true;

    } catch(const IException &e) {

        QString addMsg;

        if (!mClimate.isEmpty())

            addMsg = QString("last Climate: %1 ").arg(mClimate.last()->name());

        if (!mSpeciesSets.isEmpty())

            addMsg += QString("last Speciesset table: %1").arg(mSpeciesSets.last()->name());

        QString error_msg = QString("An error occured during the setup of the environment: \n%1\n%2").arg(e.message()).arg(addMsg);

        qDebug() << error_msg;

        Helper::msg(error_msg);

        return false;

    }

}

/** sets the "pointer" to a "position" (metric coordinates).

    All specified values are set (also the climate/species-set pointers).

*/

void Environment::setPosition(const QPointF position)

{

    // no changes occur, when the "environment" is not loaded

    if (!isSetup())

        return;

    QString key;

    int ix=-1, iy=-1, id=-1;

    if (mGridMode) {

        // grid mode

        id = mGrid->value(position);

        mCurrentID = id;

        key = QString::number(id);

        if (id==-1)

            return; // no data for the resource unit

    } else {

        // access data in the matrix by resource unit indices

        ix = int(position.x() / 100.); // suppose size of 1 ha for each coordinate

        iy = int(position.y() / 100.);

        key=QString("%1_%2").arg(ix).arg(iy);

    }

    if (mRowCoordinates.contains(key)) {

        XmlHelper xml(GlobalSettings::instance()->settings());

        int row = mRowCoordinates[key];

        QString value;

        if (logLevelInfo()) qDebug() << "settting up point" << position << "with row" << row;

        for (int col=0;col<mInfile->colCount(); col++) {

            if (mKeys[col]=="x" || mKeys[col]=="y" || mKeys[col]=="id") // ignore "x" and "y" keys

                continue;

            value = mInfile->value(row,col).toString();

            if (logLevelInfo()) qDebug() << "set" << mKeys[col] << "to" << value;

            xml.setNodeValue(mKeys[col], value);

            // special handling for constructed objects:

            if (mKeys[col]==speciesKey)

                mCurrentSpeciesSet = (SpeciesSet*)mCreatedObjects[value];

            if (mKeys[col]==climateKey)

                mCurrentClimate = (Climate*)mCreatedObjects[value];

        }

    } else {

        if (mGridMode)

            throw IException(QString("Environment:setposition: invalid grid id (or not present in input file): %1m/%2m (mapped to id %3).")

                             .arg(position.x()).arg(position.y()).arg(id));

        else

            throw IException(QString("Environment:setposition: invalid coordinates (or not present in input file): %1m/%2m (mapped to indices %3/%4).")

                             .arg(position.x()).arg(position.y()).arg(ix).arg(iy));

    }

}

bool Environment::setGridMode(const QString &grid_file_name)

{

    mGrid = new GisGrid();

    mGrid->loadFromFile(grid_file_name);

    mGridMode = true;

    return true;

}