/*
 * (C) Copyright 1996-2016 ECMWF.
 *
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
 * In applying this licence, ECMWF does not waive the privileges and immunities
 * granted to it by virtue of its status as an intergovernmental organisation nor
 * does it submit to any jurisdiction.
 */

/*! \file GeoRectangularProjection.cc
    \brief Implementation of GeoRectangularProjection.
    \author Meteorological Visualisation Section, ECMWF

    Started: Thu Jan 10 17:24:36 2008

*/

#include "GeoRectangularProjection.h"

#include "Polyline.h"
#include "Text.h"

#include "GridPlotting.h"
#include "LabelPlotting.h"
#include "MagJSon.h"
#include "MatrixHandler.h"
#include "ParameterSettings.h"
#include "SceneVisitor.h"
#include "UserPoint.h"

using namespace magics;

/*!
  \brief Constructor
*/
GeoRectangularProjection::GeoRectangularProjection() : projection_(0) {
    init();
    // Tiling information

    originX_     = 0;
    originY_     = 0;
    tile_        = 256;
    unit_        = 360.;
    unitEpsilon_ = unit_ * 0.0001;
    name_ = "cylindrical";
}

/*!
  \brief Destructor

  \todo do we need here a "delete projection_;" as in MercatorProjection::~MercatorProjection() ?
*/
GeoRectangularProjection::~GeoRectangularProjection() {}

void GeoRectangularProjection::print(ostream& o) const {
    o << "GeoRectangularProjection[";
    GeoRectangularProjectionAttributes::print(o);
    o << "]";
}


PaperPoint GeoRectangularProjection::operator()(const UserPoint& point) const {
    if (!projection_) {
        return PaperPoint(point.x(), point.y(), point.value(), point.missing(), point.border(), 0, point.name());
    }

    TeCoord2D geo = TeCoord2D(point.x() * TeCDR, point.y() * TeCDR);
    TeCoord2D xy  = projection_->LL2PC(geo);

    return PaperPoint(xy.x(), xy.y(), point.value(), point.missing(), point.border(), 0, point.name());
}

PaperPoint GeoRectangularProjection::operator()(const PaperPoint& point) const {
    MagLog::dev() << "GeoRectangularProjection::operator()(...) needs implementing." << endl;
    return Transformation::operator()(point);
}

void GeoRectangularProjection::revert(const PaperPoint& xy, UserPoint& point) const {
    if (!projection_) {
        point = UserPoint(xy.x(), xy.y());
        return;
    }
    TeCoord2D texy = TeCoord2D(xy.x(), xy.y());
    TeCoord2D geo  = projection_->PC2LL(texy);
    point          = UserPoint(geo.x() * TeCRD, geo.y() * TeCRD);
}


void GeoRectangularProjection::revert(const vector<std::pair<double, double> >& input,
                                      vector<std::pair<double, double> >& output) const {
    output.reserve(input.size());
    const vector<std::pair<double, double> >::const_iterator in_end = input.end();
    if (!projection_) {
        for (vector<std::pair<double, double> >::const_iterator pt = input.begin(); pt != in_end; ++pt) {
            output.push_back(*pt);
        }
        return;
    }
    ASSERT(projection_);

    for (vector<std::pair<double, double> >::const_iterator pt = input.begin(); pt != in_end; ++pt) {
        TeCoord2D texy = TeCoord2D(pt->first, pt->second);
        TeCoord2D geo  = projection_->PC2LL(texy);
        output.push_back(make_pair(geo.x() * TeCRD, geo.y() * TeCRD));
    }
}

bool GeoRectangularProjection::needShiftedCoastlines() const {
    return true;
}

void GeoRectangularProjection::boundingBox(double& xmin, double& ymin, double& xmax, double& ymax) const {
    xmin             = std::min(min_longitude_, max_longitude_);
    xmax             = std::max(min_longitude_, max_longitude_);
    ymin             = std::min(min_latitude_, max_latitude_);
    ymax             = std::max(min_latitude_, max_latitude_);
    const double tol = 1.;
    xmin             = xmin - tol;
    xmax             = xmax + tol;
    ymin             = (ymin < (-90 + tol)) ? -90. : ymin - tol;
    ymax             = (ymax > (90 - tol)) ? 90. : ymax + tol;
}

void GeoRectangularProjection::smallestBoundingBox(double& xmin, double& ymin, double& xmax, double& ymax) const {
    xmin = std::min(min_longitude_, max_longitude_);
    xmax = std::max(min_longitude_, max_longitude_);
    ymin = std::min(min_latitude_, max_latitude_);
    ymax = std::max(min_latitude_, max_latitude_);
}

bool GeoRectangularProjection::verifyDef(const string& def) const {
    return (def == "EPSG:4326" || def == "CRS:84");
}


void GeoRectangularProjection::aspectRatio(double& w, double& h) {
    init();
    Transformation::aspectRatio(w, h);
}


double GeoRectangularProjection::getMinX() const {
    return min_longitude_;
}

double GeoRectangularProjection::getMinY() const {
    return min_latitude_;
}

double GeoRectangularProjection::getMaxX() const {
    return max_longitude_;
}

double GeoRectangularProjection::getMaxY() const {
    return max_latitude_;
}

void GeoRectangularProjection::setMinX(double xx) {
    min_longitude_ = xx;
}

void GeoRectangularProjection::setMinY(double yy) {
    min_latitude_ = yy;
}

void GeoRectangularProjection::setMaxX(double xx) {
    max_longitude_ = xx;
}

void GeoRectangularProjection::setMaxY(double yy) {
    max_latitude_ = yy;
}

double GeoRectangularProjection::getMinPCX() const {
    return xpcmin_;
}



double GeoRectangularProjection::getMinPCY() const {
    return ypcmin_;
}

double GeoRectangularProjection::getMaxPCX() const {
    return xpcmax_;
}

double GeoRectangularProjection::getMaxPCY() const {
    return ypcmax_;
}

double GeoRectangularProjection::getExtendedMinPCX() const {
    return xpcmin_ - xgutter_;
}

double GeoRectangularProjection::getExtendedMinPCY() const {
    return ypcmin_- ygutter_;
}

double GeoRectangularProjection::getExtendedMaxPCX() const {
    return xpcmax_ + xgutter_;
}

double GeoRectangularProjection::getExtendedMaxPCY() const {
    return ypcmax_ + ygutter_;
}

void GeoRectangularProjection::gridLongitudes(const GridPlotting& grid) const {
    const vector<double>& longitudes             = grid.longitudes();
    const double min                             = std::max(min_latitude_, -90.);
    const double max                             = std::min(max_latitude_, 90.);
    const double step                            = (max - min) / 20;
    const vector<double>::const_iterator lon_end = longitudes.end();
    for (vector<double>::const_iterator lon = longitudes.begin(); lon != lon_end; ++lon) {
        magics::Polyline poly;
        poly.setAntiAliasing(false);

        for (double lat = min; lat <= max + step; lat += step) {
            (lat > max) ? poly.push_back((*this)(UserPoint(*lon, max))) : poly.push_back((*this)(UserPoint(*lon, lat)));
        }
        grid.add(poly);
    }
}

void GeoRectangularProjection::gridLatitudes(const GridPlotting& grid) const {
    const vector<double>& latitudes = grid.latitudes();

    const double step                            = (max_longitude_ - min_longitude_) / 20;
    const vector<double>::const_iterator lat_end = latitudes.end();
    for (vector<double>::const_iterator lat = latitudes.begin(); lat != lat_end; ++lat) {
        if (*lat < -90)
            continue;
        if (*lat > 90)
            continue;
        magics::Polyline poly;
        poly.setAntiAliasing(false);
        for (double lon = getMinX(); lon < getMaxX(); lon += step) {
            poly.push_back((*this)(UserPoint(lon, *lat)));
        }
        // add the last one!
        poly.push_back((*this)(UserPoint(getMaxX(), *lat)));
        grid.add(poly);
    }
}

/*!
 \brief generates text to mark longitudes at the top

 \sa Text
*/
void GeoRectangularProjection::labels(const LabelPlotting& label, TopAxisVisitor&) const {
    Text* text;
    const double cy                              = min_latitude_ + (max_latitude_ - min_latitude_) * .2;
    const vector<double>& longitudes             = label.longitudes();
    const vector<double>::const_iterator lon_end = longitudes.end();
    for (vector<double>::const_iterator lon = longitudes.begin(); lon != lon_end; ++lon) {
        if (*lon > min_longitude_ && *lon < max_longitude_) {
            UserPoint point(*lon, cy);
            text = new Text();
            label.add(text);
            text->setText(writeLongitude(point));
            text->setJustification(Justification::CENTRE);
            text->setVerticalAlign(VerticalAlign::BOTTOM);
            text->push_back((*this)(point));
        }
    }
}

/*!
 \brief generates text to mark longitudes at the bottom

 \sa Text
*/
void GeoRectangularProjection::labels(const LabelPlotting& label, BottomAxisVisitor&) const {
    Text* text;
    const double cy                              = min_latitude_ + (max_latitude_ - min_latitude_) * .8;
    const vector<double>& longitudes             = label.longitudes();
    const vector<double>::const_iterator lon_end = longitudes.end();
    for (vector<double>::const_iterator lon = longitudes.begin(); lon != lon_end; ++lon) {
        if (*lon > min_longitude_ && *lon < max_longitude_) {
            UserPoint point(*lon, cy);
            text = new Text();
            label.add(text);
            text->setText(writeLongitude(point));
            text->setJustification(Justification::CENTRE);
            text->setVerticalAlign(VerticalAlign::TOP);
            text->push_back((*this)(point));
        }
    }
}

/*!
 \brief generates text to mark latitudes at the left

 \sa Text
*/
void GeoRectangularProjection::labels(const LabelPlotting& label, LeftAxisVisitor&) const {
    Text* text;
    const vector<double>& latitudes              = label.latitudes();
    const vector<double>::const_iterator lat_end = latitudes.end();
    const double lon                             = max_longitude_ - ((max_longitude_ - min_longitude_) * .1);
    for (vector<double>::const_iterator lat = latitudes.begin(); lat != lat_end; ++lat) {
        if (*lat > min_latitude_ && *lat < max_latitude_) {
            UserPoint point(lon, *lat);
            text = new Text();
            label.add(text);
            text->setText(writeLatitude(point));
            text->setJustification(Justification::RIGHT);
            text->setVerticalAlign(VerticalAlign::HALF);
            text->push_back((*this)(point));
        }
    }
}

void GeoRectangularProjection::labels(const LabelPlotting&, DrawingVisitor&) const {}

/*!
 \brief generates text to mark latitudes at the right

 \sa Text
*/
void GeoRectangularProjection::labels(const LabelPlotting& label, RightAxisVisitor&) const {
    Text* text;
    const vector<double>& latitudes              = label.latitudes();
    const vector<double>::const_iterator lat_end = latitudes.end();
    for (vector<double>::const_iterator lat = latitudes.begin(); lat != lat_end; ++lat) {
        if (*lat > min_latitude_ && *lat < max_latitude_) {
            const double lon = min_longitude_ + ((max_longitude_ - min_longitude_) * .1);
            UserPoint point(lon, *lat);
            text = new Text();
            label.add(text);
            text->setText(writeLatitude(point));
            text->setJustification(Justification::LEFT);
            text->setVerticalAlign(VerticalAlign::HALF);
            text->push_back((*this)(point));
        }
    }
}

double GeoRectangularProjection::patchDistance(double res) const {
    return res;
}

void GeoRectangularProjection::init() {
    // make sure min < max!
    // reset any previous setting
    userEnveloppe_->clear();
    PCEnveloppe_->clear();

    while (min_longitude_ > max_longitude_) {
        max_longitude_ += 360;
        MagLog::warning() << "lower_left_longitude > upper_right_longitude --> upper_right_longitude is change to "
                          << max_longitude_ << endl;
    }

    if (min_latitude_ > max_latitude_) {
        MagLog::warning() << "lower_left_latitude > upper_right_latitude --> swap" << endl;
        std::swap(min_latitude_, max_latitude_);
    }

    if (max_longitude_ - min_longitude_ < min_area_) {
        max_longitude_ = min_longitude_ + min_area_;
        MagLog::warning() << "The geographical area has been extented to respect the minimal dimension" << endl;
    }

    if (max_latitude_ - min_latitude_ < min_area_) {
        max_latitude_ = min_latitude_ + min_area_;
        MagLog::warning() << "The geographical area has been extented to respect the minimal dimension" << endl;
    }

    if (max_longitude_ - min_longitude_ > 1080)
        max_longitude_ = min_longitude_ + 1080;

    // Now 	we try to get the min longitudes in the the ranges -360/+720
    while (min_longitude_ < -360) {
        min_longitude_ += 360;
        max_longitude_ += 360;
    }
    while (max_longitude_ > 720) {
        min_longitude_ -= 360;
        max_longitude_ -= 360;
    }

    //	if ( min_latitude_ < -90) min_latitude_ = -90.;
    //	if ( max_latitude_ > 90 ) max_latitude_ = 90;

    xpcmin_ = min_longitude_;
    ypcmin_ = min_latitude_;
    xpcmax_ = max_longitude_;
    ypcmax_ = max_latitude_;

    xgutter_ = ((xpcmax_ - xpcmin_ ) * gutter_)/100;
    ygutter_ = ((ypcmax_ - ypcmin_ ) * gutter_)/100;
  
    userEnveloppe_->push_back(PaperPoint(min_longitude_, min_latitude_));
    userEnveloppe_->push_back(PaperPoint(min_longitude_, max_latitude_));
    userEnveloppe_->push_back(PaperPoint(max_longitude_, max_latitude_));
    userEnveloppe_->push_back(PaperPoint(max_longitude_, min_latitude_));
    userEnveloppe_->push_back(PaperPoint(min_longitude_, min_latitude_));

    PCEnveloppe_->push_back(PaperPoint(min_longitude_, min_latitude_));
    PCEnveloppe_->push_back(PaperPoint(min_longitude_, max_latitude_));
    PCEnveloppe_->push_back(PaperPoint(max_longitude_, max_latitude_));
    PCEnveloppe_->push_back(PaperPoint(max_longitude_, min_latitude_));
    PCEnveloppe_->push_back(PaperPoint(min_longitude_, min_latitude_));

    askedxmin_ = std::min(xpcmin_, xpcmax_);
    askedxmax_ = std::max(xpcmin_, xpcmax_);
    askedymin_ = std::min(ypcmin_, ypcmax_);
    askedymax_ = std::max(ypcmin_, ypcmax_);
}

MercatorProjection::MercatorProjection() {}

MercatorProjection::~MercatorProjection() {
    delete projection_;
}

void MercatorProjection::print(ostream& o) const {
    o << " mercator[";
    GeoRectangularProjection::print(o);
    o << "]";
}

void MercatorProjection::init() {
    if (!projection_)
        projection_ = new TeMercator(TeDatum(), 0);
    // make sure min < max!
    if (min_longitude_ > max_longitude_) {
        MagLog::warning() << "lower_left_lon > upper_right_lon --> swap" << endl;
        std::swap(min_longitude_, max_longitude_);
    }
    if (min_latitude_ > max_latitude_) {
        MagLog::warning() << "lower_left_lat > upper_right_lat --> swap" << endl;
        std::swap(min_latitude_, max_latitude_);
    }

    const double t = 2;
    min_latitude_  = std::max(min_latitude_, -89.);
    max_latitude_  = std::min(max_latitude_, 89.);
    min_longitude_ = std::max(min_longitude_, -180.);
    max_longitude_ = std::min(max_longitude_, 720.);

    if (max_longitude_ - min_longitude_ < t)
        max_longitude_ = min_longitude_ + t;
    if (max_latitude_ - min_latitude_ < t)
        max_latitude_ = min_latitude_ + t;

    UserPoint ll(min_longitude_, min_latitude_);
    UserPoint ur(max_longitude_, max_latitude_);

    PaperPoint xy;

    xy      = (*this)(ll);
    xpcmin_ = xy.x();
    ypcmin_ = xy.y();

    xy      = (*this)(ur);
    xpcmax_ = xy.x();
    ypcmax_ = xy.y();  
    userEnveloppe_->clear();
    PCEnveloppe_->clear();
    askedxmin_ = std::min(xpcmin_, xpcmax_);
    askedxmax_ = std::max(xpcmin_, xpcmax_);
    askedymin_ = std::min(ypcmin_, ypcmax_);
    askedymax_ = std::max(ypcmin_, ypcmax_);
}

bool MercatorProjection::fast_reproject(double& x, double& y) const {
    TeCoord2D geo = TeCoord2D(x * TeCDR, y * TeCDR);
    TeCoord2D xy  = projection_->LL2PC(geo);

    x = xy.x();
    y = xy.y();
    return true;
}


void GeoRectangularProjection::setNewPCBox(double minx, double miny, double maxx, double maxy) {
    PaperPoint p1(minx, miny);
    PaperPoint p2(maxx, maxy);
    UserPoint ll, ur;

    revert(p1, ll);
    revert(p2, ur);

    min_longitude_ = ll.x();
    max_longitude_ = ur.x();
    min_latitude_  = ll.y();
    max_latitude_  = ur.y();
}


/*!
  \brief Set the resolution of Coastlines
*/
void GeoRectangularProjection::coastSetting(map<string, string>& setting, double abswidth, double absheight) const {
    // work out the ratios of geographical to paper lengths
    const double xratio = (max_longitude_ - min_longitude_) / abswidth;
    const double yratio = (max_latitude_ - min_latitude_) / absheight;

    // choose the smallest (smaller ratio means more detail required)
    const double ratio = min(xratio, yratio);

    std::string resol = "110m";
    if (ratio < 0.8)  // highest resolution
    {
        resol = "10m";
    }
    else if (ratio < 3.5)  // medium resolution
    {
        resol = "50m";
    }

    setting["resolution"] = resol;
    setting["land"]       = resol + "/ne_" + resol + "_land";
    setting["ocean"]      = resol + "/ne_" + resol + "_ocean";
    setting["coast"]      = resol + "/ne_" + resol + "_coastline";
    setting["rivers"]     = resol + "/ne_" + resol + "_rivers_lake_centerlines";
    setting["boundaries"] = resol + "/ne_" + resol + "_admin_0_boundary_lines_land";

    //! \note Administraive borders hardcoded to 10m resolution (low res version do not contain all info)
    setting["administrative_boundaries"] = "10m/ne_10m_admin_1_states_provinces_lines";

    MagLog::dev() << "GeoRectangularProjection::coastSetting[" << abswidth << ", " << absheight << "]->" << ratio
                  << " resol: " << resol << endl;
}


MatrixHandler* GeoRectangularProjection::prepareData(const AbstractMatrix& matrix) const {
    // return new MatrixHandler(matrix);
    return new GeoBoxMatrixHandler(matrix, *this);
}

void GeoRectangularProjection::populate(double lon, double lat, double value, vector<UserPoint>& out) const {
    while (lon < min_longitude_)
        lon += 360;
    while (lon > min_longitude_ + 360.)
        lon -= 360.;

    if (!in(lon, lat))
        return;

    out.push_back(UserPoint(lon, lat, value));
    double normlon = lon;
    lon += 360.;
    while (lon > min_longitude_ && lon < max_longitude_) {
        out.push_back(UserPoint(lon, lat, value));
        lon += 360;
    }
    // To the West
    lon = normlon;
    lon -= 360.;
    while (lon > min_longitude_ && lon < max_longitude_) {
        out.push_back(UserPoint(lon, lat, value));
        lon -= 360;
    }
}

void GeoRectangularProjection::wraparound(const UserPoint& origin, stack<UserPoint>& out) const {
    UserPoint point = origin;
   
    if (point.y_ > max_latitude_ || point.y_ < min_latitude_)
        return;

    while (point.x_ < min_longitude_)
        point.x_ += 360;
    while (point.x_ > min_longitude_ + 360.)
        point.x_ -= 360.;


    if (point.x_ < min_longitude_ || point.x_ > max_longitude_) {
        return;
    }

    out.push(point);

    double lon = point.x_;
    // To the East
    point.x_ = lon + 360.;
    while (point.x_ > min_longitude_ && point.x_ < max_longitude_) {
        out.push(point);
        point.x_ += 360;
    }
    // To the West
    point.x_ = lon - 360.;
    while (point.x_ > min_longitude_ && point.x_ < max_longitude_) {
        out.push(point);
        point.x_ -= 360;
    }
}

magics::Polyline& GeoRectangularProjection::getPCBoundingBox() const {
    if (PCEnveloppe_->empty()) {
        PCEnveloppe_->push_back(PaperPoint(xpcmin_, ypcmin_));
        PCEnveloppe_->push_back(PaperPoint(xpcmin_, ypcmax_));
        PCEnveloppe_->push_back(PaperPoint(xpcmax_, ypcmax_));
        PCEnveloppe_->push_back(PaperPoint(xpcmax_, ypcmin_));
        PCEnveloppe_->push_back(PaperPoint(xpcmin_, ypcmin_));
    }
    return *PCEnveloppe_;
}

magics::Polyline& GeoRectangularProjection::getUserBoundingBox() const {
    if (userEnveloppe_->empty()) {
        userEnveloppe_->push_back(PaperPoint(min_longitude_, min_latitude_));
        userEnveloppe_->push_back(PaperPoint(min_longitude_, max_latitude_));
        userEnveloppe_->push_back(PaperPoint(max_longitude_, max_latitude_));
        userEnveloppe_->push_back(PaperPoint(max_longitude_, min_latitude_));
        userEnveloppe_->push_back(PaperPoint(min_longitude_, min_latitude_));
    }
    return *userEnveloppe_;
}

void GeoRectangularProjection::getNewDefinition(const UserPoint& ll, const UserPoint& ur, string& out) const {
    map<string, string> def;
    def["subpage_map_projection"]        = "cylindrical";
    def["subpage_map_area_definition"]   = "corners";
    def["subpage_lower_left_longitude"]  = tostring(ll.x_);
    def["subpage_lower_left_latitude"]   = tostring(ll.y_);
    def["subpage_upper_right_longitude"] = tostring(ur.x_);
    def["subpage_upper_right_latitude"]  = tostring(ur.y_);
    ::toxml(out, def);
    out = "{" + out + "}";
}

void GeoRectangularProjection::setDefinition(const string& json) {
    if (json.empty())
        return;

    MagJSon helper;
    helper.interpret(json);

    XmlNode node = **helper.tree_.begin();
    node.name("cylindrical");
    set(node);
}

double MercatorProjection::patchDistance(double) const {
    return 1000000;
}

double GeoRectangularProjection::ratio() const {
    // return domain/fulldomain!

    return ((max_longitude_ - min_longitude_) * (max_latitude_ - min_latitude_)) / (360 * 180);
}
