#!/usr/bin/env python
###############################################################################
# $Id: contour.py 9f44fccde2c360af26a9bc9c354c0d673c0dcc77 2018-04-17 17:57:11 +1000 Ben Elliston $
#
# Project:  GDAL/OGR Test Suite
# Purpose:  ContourGenerate() testing
# Author:   Even Rouault <even dot rouault @ mines-paris dot org>
#
###############################################################################
# Copyright (c) 2010, Even Rouault <even dot rouault at mines-paris dot org>
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
###############################################################################

import array
import os
import sys

sys.path.append('../pymod')

from osgeo import gdal
from osgeo import ogr
import gdaltest

###############################################################################
# Test with -a and -i options


def contour_1():

    try:
        os.remove('tmp/contour.shp')
    except OSError:
        pass
    try:
        os.remove('tmp/contour.dbf')
    except OSError:
        pass
    try:
        os.remove('tmp/contour.shx')
    except OSError:
        pass

    drv = gdal.GetDriverByName('GTiff')
    wkt = 'GEOGCS[\"WGS 84\",DATUM[\"WGS_1984\",SPHEROID[\"WGS 84\",6378137,298.257223563,AUTHORITY[\"EPSG\",\"7030\"]],AUTHORITY[\"EPSG\",\"6326\"]],PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9108\"]],AUTHORITY[\"EPSG\",\"4326\"]]'

    size = 160
    precision = 1.0 / size

    ds = drv.Create('tmp/gdal_contour.tif', size, size, 1)
    ds.SetProjection(wkt)
    ds.SetGeoTransform([1, precision, 0, 50, 0, -precision])

    raw_data = array.array('h', [10 for i in range(int(size / 2))]).tostring()
    for i in range(int(size / 2)):
        ds.WriteRaster(int(size / 4), i + int(size / 4), int(size / 2), 1, raw_data,
                       buf_type=gdal.GDT_Int16,
                       band_list=[1])

    raw_data = array.array('h', [20 for i in range(int(size / 2))]).tostring()
    for i in range(int(size / 4)):
        ds.WriteRaster(int(size / 4) + int(size / 8), i + int(size / 4) + int(size / 8), int(size / 4), 1, raw_data,
                       buf_type=gdal.GDT_Int16,
                       band_list=[1])

    raw_data = array.array('h', [25 for i in range(int(size / 4))]).tostring()
    for i in range(int(size / 8)):
        ds.WriteRaster(int(size / 4) + int(size / 8) + int(size / 16), i + int(size / 4) + int(size / 8) + int(size / 16), int(size / 8), 1, raw_data,
                       buf_type=gdal.GDT_Int16,
                       band_list=[1])

    ogr_ds = ogr.GetDriverByName('ESRI Shapefile').CreateDataSource('tmp/contour.shp')
    ogr_lyr = ogr_ds.CreateLayer('contour')
    field_defn = ogr.FieldDefn('ID', ogr.OFTInteger)
    ogr_lyr.CreateField(field_defn)
    field_defn = ogr.FieldDefn('elev', ogr.OFTReal)
    ogr_lyr.CreateField(field_defn)

    gdal.ContourGenerate(ds.GetRasterBand(1), 10, 0, [], 0, 0, ogr_lyr, 0, 1)

    ds = None

    expected_envelopes = [[1.25, 1.75, 49.25, 49.75],
                          [1.25 + 0.125, 1.75 - 0.125, 49.25 + 0.125, 49.75 - 0.125]]
    expected_height = [10, 20]

    lyr = ogr_ds.ExecuteSQL("select * from contour order by elev asc")

    if lyr.GetFeatureCount() != len(expected_envelopes):
        print('Got %d features. Expected %d' % (lyr.GetFeatureCount(), len(expected_envelopes)))
        return 'fail'

    i = 0
    feat = lyr.GetNextFeature()
    while feat is not None:
        envelope = feat.GetGeometryRef().GetEnvelope()
        if feat.GetField('elev') != expected_height[i]:
            print('Got %f. Expected %f' % (feat.GetField('elev'), expected_height[i]))
            return 'fail'
        for j in range(4):
            if abs(expected_envelopes[i][j] - envelope[j]) > precision / 2 * 1.001:
                print('i=%d, wkt=%s' % (i, feat.GetGeometryRef().ExportToWkt()))
                print(feat.GetGeometryRef().GetEnvelope())
                print(expected_envelopes[i])
                print('%f, %f' % (expected_envelopes[i][j] - envelope[j], precision / 2))
                return 'fail'
        i = i + 1
        feat = lyr.GetNextFeature()

    ogr_ds.ReleaseResultSet(lyr)
    ogr_ds.Destroy()

    return 'success'

###############################################################################
# Test with -fl option and -3d option


def contour_2():

    try:
        os.remove('tmp/contour.shp')
    except OSError:
        pass
    try:
        os.remove('tmp/contour.dbf')
    except OSError:
        pass
    try:
        os.remove('tmp/contour.shx')
    except OSError:
        pass

    ogr_ds = ogr.GetDriverByName('ESRI Shapefile').CreateDataSource('tmp/contour.shp')
    ogr_lyr = ogr_ds.CreateLayer('contour', geom_type=ogr.wkbLineString25D)
    field_defn = ogr.FieldDefn('ID', ogr.OFTInteger)
    ogr_lyr.CreateField(field_defn)
    field_defn = ogr.FieldDefn('elev', ogr.OFTReal)
    ogr_lyr.CreateField(field_defn)

    ds = gdal.Open('tmp/gdal_contour.tif')
    gdal.ContourGenerate(ds.GetRasterBand(1), 0, 0, [10, 20, 25], 0, 0, ogr_lyr, 0, 1)
    ds = None

    size = 160
    precision = 1. / size

    expected_envelopes = [[1.25, 1.75, 49.25, 49.75],
                          [1.25 + 0.125, 1.75 - 0.125, 49.25 + 0.125, 49.75 - 0.125],
                          [1.25 + 0.125 + 0.0625, 1.75 - 0.125 - 0.0625, 49.25 + 0.125 + 0.0625, 49.75 - 0.125 - 0.0625]]
    expected_height = [10, 20, 25]

    lyr = ogr_ds.ExecuteSQL("select * from contour order by elev asc")

    if lyr.GetFeatureCount() != len(expected_envelopes):
        print('Got %d features. Expected %d' % (lyr.GetFeatureCount(), len(expected_envelopes)))
        return 'fail'

    i = 0
    feat = lyr.GetNextFeature()
    while feat is not None:
        if feat.GetGeometryRef().GetZ(0) != expected_height[i]:
            print('Got %f as z. Expected %f' % (feat.GetGeometryRef().GetZ(0), expected_height[i]))
            return 'fail'
        envelope = feat.GetGeometryRef().GetEnvelope()
        if feat.GetField('elev') != expected_height[i]:
            print('Got %f. Expected %f' % (feat.GetField('elev'), expected_height[i]))
            return 'fail'
        for j in range(4):
            if abs(expected_envelopes[i][j] - envelope[j]) > precision / 2 * 1.001:
                print('i=%d, wkt=%s' % (i, feat.GetGeometryRef().ExportToWkt()))
                print(feat.GetGeometryRef().GetEnvelope())
                print(expected_envelopes[i])
                print('%f, %f' % (expected_envelopes[i][j] - envelope[j], precision / 2))
                return 'fail'
        i = i + 1
        feat = lyr.GetNextFeature()

    ogr_ds.ReleaseResultSet(lyr)
    ogr_ds.Destroy()

    return 'success'

###############################################################################
# Cleanup


def contour_cleanup():

    ogr.GetDriverByName('ESRI Shapefile').DeleteDataSource('tmp/contour.shp')
    try:
        os.remove('tmp/gdal_contour.tif')
    except OSError:
        pass

    return 'success'


gdaltest_list = [
    contour_1,
    contour_2,
    contour_cleanup
]


if __name__ == '__main__':

    gdaltest.setup_run('contour')

    gdaltest.run_tests(gdaltest_list)

    gdaltest.summarize()
