package com.se.nsl.helper;

import lombok.extern.slf4j.Slf4j;
import org.gdal.gdal.Band;
import org.gdal.gdal.Dataset;
import org.gdal.gdal.gdal;
import org.gdal.gdalconst.gdalconst;
import org.gdal.ogr.*;
import org.gdal.osr.CoordinateTransformation;
import org.gdal.osr.SpatialReference;
import org.gdal.osr.osr;

import java.io.File;

@Slf4j
@SuppressWarnings("ALL")
public class GdalHelper {
    public final static int I4326 = 4326;

    public final static int I4490 = 4490;

    public static SpatialReference SR4326;

    public static SpatialReference SR4490;

    public final static String CGCS2000 = "CGCS2000";

    /**
     * 初始化
     */
    public static void init(String gdalPath) {
        // 配置环境变量
        if (!StringHelper.isEmpty(gdalPath)) {
            if (WebHelper.isWin()) {
                gdal.SetConfigOption("GDAL_HOME", gdalPath);
                gdal.SetConfigOption("GDAL_DATA", gdalPath + File.separator + "gdal-data");
                gdal.SetConfigOption("PROJ_LIB", gdalPath + File.separator + "projlib"); // /proj7/share
                //gdal.SetConfigOption("GDAL_DRIVER_PATH", gdalPath + File.separator + "gdalplugins");

                String path = System.getenv("PATH");
                if (!path.contains(gdalPath)) {
                    System.setProperty("PATH", path + ";" + gdalPath);
                }
            } else {
                //System.setProperty("java.library.path", gdalPath);
            }
        }

        gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "YES");
        gdal.SetConfigOption("SHAPE_ENCODING", "");
        //gdal.SetConfigOption("PGEO_DRIVER_TEMPLATE", "DRIVER=Microsoft Access Driver (*.mdb, *.accdb);DBQ=%s");
        //gdal.SetConfigOption("MDB_DRIVER_TEMPLATE", "DRIVER=Microsoft Access Driver (*.mdb, *.accdb);DBQ=%s");

        gdal.AllRegister();
        ogr.RegisterAll();
        initSr();
    }

    public static void initSr() {
        try {
            SR4326 = new SpatialReference();
            SR4326.ImportFromEPSG(I4326);
            SR4326.SetAxisMappingStrategy(osr.OAMS_TRADITIONAL_GIS_ORDER);

            SR4490 = new SpatialReference();
            SR4490.ImportFromEPSG(I4490);
            SR4490.SetAxisMappingStrategy(osr.OAMS_TRADITIONAL_GIS_ORDER);
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        }
    }

    public static SpatialReference createSpatialReference(int epsg) {
        SpatialReference sr = new SpatialReference();
        sr.ImportFromEPSG(epsg);
        sr.SetAxisMappingStrategy(osr.OAMS_TRADITIONAL_GIS_ORDER);

        return sr;
    }

    public static void createPyramid(String file) {
        Dataset ds = null;
        try {
            File f = new File(file);
            if (!f.exists() || f.isDirectory()) {
                return;
            }

            ds = gdal.Open(file, gdalconst.GA_ReadOnly);
            if (null == ds || ds.getRasterCount() < 1 || null == ds.GetSpatialRef()) {
                return;
            }

            Band band = ds.GetRasterBand(1);
            if (0 == band.GetOverviewCount()) {
                ds.BuildOverviews("nearest", new int[]{2, 4, 6, 8, 16}, null);
            }
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        } finally {
            if (null != ds) {
                ds.delete();
            }
        }
    }

    public static void delete(Layer layer, DataSource dataSource, Driver driver) {
        try {
            if (null != layer) {
                layer.delete();
            }
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        }
        try {
            if (null != dataSource) {
                dataSource.delete();
            }
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        }
        try {
            if (null != driver) {
                driver.delete();
            }
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        }
    }

    public static Geometry getMinPoint(Dataset ds) {
        double[] transform = new double[6];
        ds.GetGeoTransform(transform);

        double xMin = transform[0];
        double yMin = transform[3] - ds.getRasterYSize() * transform[1];

        Geometry point = new Geometry(ogr.wkbPoint);
        point.AddPoint(xMin, yMin, 0);

        return Transform(ds, point);
    }

    public static Geometry getMaxPoint(Dataset ds) {
        double[] transform = new double[6];
        ds.GetGeoTransform(transform);

        double xMax = transform[0] + (ds.getRasterYSize() * transform[1]);
        double yMax = transform[3];

        Geometry point = new Geometry(ogr.wkbPoint);
        point.AddPoint(xMax, yMax, 0);

        return Transform(ds, point);
    }

    public static Geometry Transform(Dataset ds, Geometry point) {
        point.AssignSpatialReference(ds.GetSpatialRef());
        if (ds.GetSpatialRef().IsGeographic() > 0) {
            return point;
        }

        String srsName = ds.GetSpatialRef().GetName();
        //if (srsName.Contains(CGCS2000))
        //{
        //    point.TransformTo(sr4490);
        //}
        //else
        //{
        point.TransformTo(SR4326);
        //}
        //point.SwapXY();

        return point;
    }

    public static Geometry toWgs84(SpatialReference sr, double x, double y) {
        Geometry point = new Geometry(ogr.wkbPoint);
        point.AssignSpatialReference(sr);
        point.AddPoint(x, y);

        point.TransformTo(GdalHelper.SR4326);
        //point.SwapXY();

        return point;
    }

    public static int toWgs84(SpatialReference sr, Geometry g) {
        CoordinateTransformation ct = new CoordinateTransformation(sr, GdalHelper.SR4326);
        if (sr.IsProjected() != 1) {
            sr.SetAxisMappingStrategy(osr.OAMS_TRADITIONAL_GIS_ORDER);
        }

        return g.TransformTo(GdalHelper.SR4326);
    }

    public static double[] fromWgs84(SpatialReference sr, double x, double y) {
        CoordinateTransformation ct = new CoordinateTransformation(GdalHelper.SR4326, sr);
        if (sr.IsProjected() != 1) {
            sr.SetAxisMappingStrategy(osr.OAMS_TRADITIONAL_GIS_ORDER);
        }

        return ct.TransformPoint(x, y);
    }

    public static int fromWgs84(SpatialReference sr, Geometry g) {
        CoordinateTransformation ct = new CoordinateTransformation(GdalHelper.SR4326, sr);
        if (sr.IsProjected() != 1) {
            sr.SetAxisMappingStrategy(osr.OAMS_TRADITIONAL_GIS_ORDER);
        }

        return g.TransformTo(sr);
    }

    public static Geometry createPolygon(SpatialReference sr, Double minx, Double miny, Double maxx, Double maxy) {
        Geometry ring = new Geometry(ogr.wkbLinearRing);
        ring.AddPoint_2D(minx, maxy);
        ring.AddPoint_2D(maxx, maxy);
        ring.AddPoint_2D(maxx, miny);
        ring.AddPoint_2D(minx, miny);
        ring.AddPoint_2D(minx, maxy);

        Geometry poly = new Geometry(ogr.wkbPolygon);
        poly.AddGeometry(ring);
        if (null != sr) {
            poly.AssignSpatialReference(sr);
        }

        return poly;
    }
}