// You can do this in the grunt config for each mocha task, see the `options` config


// Start the main app logic.

function startTests(chai, proj4, testPoints) {


  var assert = chai.assert;
  proj4.defs([
    ["EPSG:102018", "+proj=gnom +lat_0=90 +lon_0=0 +x_0=6300000 +y_0=6300000 +ellps=WGS84 +datum=WGS84 +units=m +no_defs"],
    ["testmerc", "+proj=merc +lon_0=5.937 +lat_ts=45.027 +ellps=sphere"],
    ["testmerc2", "+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +units=m +k=1.0 +nadgrids=@null +no_defs"]
  ]);
  proj4.defs('esriOnline', 'PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0]]');

  describe('parse', function() {
    it('should parse units', function() {
      assert.equal(proj4.defs('testmerc2').units, 'm');
    });
  });

  describe('proj2proj', function() {
    it('should work transforming from one projection to another', function() {
      var sweref99tm = '+proj=utm +zone=33 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs';
      var rt90 = '+lon_0=15.808277777799999 +lat_0=0.0 +k=1.0 +x_0=1500000.0 +y_0=0.0 +proj=tmerc +ellps=bessel +units=m +towgs84=414.1,41.3,603.1,-0.855,2.141,-7.023,0 +no_defs';
      var rslt = proj4(sweref99tm, rt90).forward([319180, 6399862]);
      assert.closeTo(rslt[0], 1271137.9275601401, 0.000001);
      assert.closeTo(rslt[1], 6404230.291459564, 0.000001);
    });
    it('should work with a proj object', function() {
      var sweref99tm = proj4('+proj=utm +zone=33 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs');
      var rt90 = proj4('+lon_0=15.808277777799999 +lat_0=0.0 +k=1.0 +x_0=1500000.0 +y_0=0.0 +proj=tmerc +ellps=bessel +units=m +towgs84=414.1,41.3,603.1,-0.855,2.141,-7.023,0 +no_defs');
      var rslt = proj4(sweref99tm, rt90).forward([319180, 6399862]);
      assert.closeTo(rslt[0], 1271137.9275601401, 0.000001);
      assert.closeTo(rslt[1], 6404230.291459564, 0.000001);
    });
  });

  describe('proj4', function() {
    describe('core', function() {
      testPoints.forEach(function(testPoint) {
        describe(testPoint.code, function() {
          var xyAcc = 2,
            llAcc = 6;
          if ('acc' in testPoint) {
            if ('xy' in testPoint.acc) {
              xyAcc = testPoint.acc.xy;
            }
            if ('ll' in testPoint.acc) {
              llAcc = testPoint.acc.ll;
            }
          }
          var xyEPSLN = Math.pow(10, - 1 * xyAcc);
          var llEPSLN = Math.pow(10, - 1 * llAcc);
          describe('traditional', function() {
            it('should work with forwards', function() {
              var proj = new proj4.Proj(testPoint.code);
              var xy = proj4.transform(proj4.WGS84, proj, proj4.toPoint(testPoint.ll));
              assert.closeTo(xy.x, testPoint.xy[0], xyEPSLN, 'x is close');
              assert.closeTo(xy.y, testPoint.xy[1], xyEPSLN, 'y is close');
            });
            it('should work with backwards', function() {
              var proj = new proj4.Proj(testPoint.code);
              var ll = proj4.transform(proj, proj4.WGS84, proj4.toPoint(testPoint.xy));
              assert.closeTo(ll.x, testPoint.ll[0], llEPSLN, 'lng is close');
              assert.closeTo(ll.y, testPoint.ll[1], llEPSLN, 'lat is close');
            });
          });
          describe('new method 2 param', function() {
            it('shortcut method should work with an array', function() {
              var xy = proj4(testPoint.code, testPoint.ll);
              assert.closeTo(xy[0], testPoint.xy[0], xyEPSLN, 'x is close');
              assert.closeTo(xy[1], testPoint.xy[1], xyEPSLN, 'y is close');
            });
            it('shortcut method should work with an object', function() {
              var pt = {
                x: testPoint.ll[0],
                y: testPoint.ll[1]
              };
              var xy = proj4(testPoint.code, pt);
              assert.closeTo(xy.x, testPoint.xy[0], xyEPSLN, 'x is close');
              assert.closeTo(xy.y, testPoint.xy[1], xyEPSLN, 'y is close');
            });
            it('shortcut method should work with a point object', function() {
              var pt = proj4.toPoint(testPoint.ll);
              var xy = proj4(testPoint.code, pt);
              assert.closeTo(xy.x, testPoint.xy[0], xyEPSLN, 'x is close');
              assert.closeTo(xy.y, testPoint.xy[1], xyEPSLN, 'y is close');
            });
          });
          describe('new method 3 param', function() {
            it('shortcut method should work with an array', function() {
              var xy = proj4(proj4.WGS84, testPoint.code, testPoint.ll);
              assert.closeTo(xy[0], testPoint.xy[0], xyEPSLN, 'x is close');
              assert.closeTo(xy[1], testPoint.xy[1], xyEPSLN, 'y is close');
            });
            it('shortcut method should work with an object', function() {
              var pt = {
                x: testPoint.ll[0],
                y: testPoint.ll[1]
              };
              var xy = proj4(proj4.WGS84, testPoint.code, pt);
              assert.closeTo(xy.x, testPoint.xy[0], xyEPSLN, 'x is close');
              assert.closeTo(xy.y, testPoint.xy[1], xyEPSLN, 'y is close');
            });
            it('shortcut method should work with a point object', function() {
              var pt = proj4.toPoint(testPoint.ll);
              var xy = proj4(proj4.WGS84, testPoint.code, pt);
              assert.closeTo(xy.x, testPoint.xy[0], xyEPSLN, 'x is close');
              assert.closeTo(xy.y, testPoint.xy[1], xyEPSLN, 'y is close');
            });
          });
          describe('new method 3 param other way', function() {
            it('shortcut method should work with an array', function() {
              var ll = proj4(testPoint.code, proj4.WGS84, testPoint.xy);
              assert.closeTo(ll[0], testPoint.ll[0], llEPSLN, 'x is close');
              assert.closeTo(ll[1], testPoint.ll[1], llEPSLN, 'y is close');
            });
            it('shortcut method should work with an object', function() {
              var pt = {
                x: testPoint.xy[0],
                y: testPoint.xy[1]
              };
              // in case of geocentric proj we need Z value.
              if (typeof testPoint.xy[2] === 'number') {
                pt.z = testPoint.xy[2]
              }
              var ll = proj4(testPoint.code, proj4.WGS84, pt);
              assert.closeTo(ll.x, testPoint.ll[0], llEPSLN, 'x is close');
              assert.closeTo(ll.y, testPoint.ll[1], llEPSLN, 'y is close');
            });
            it('shortcut method should work with a point object', function() {
              var pt = proj4.toPoint(testPoint.xy);
              var ll = proj4(testPoint.code, proj4.WGS84, pt);
              assert.closeTo(ll.x, testPoint.ll[0], llEPSLN, 'x is close');
              assert.closeTo(ll.y, testPoint.ll[1], llEPSLN, 'y is close');
            });
          });
          describe('1 param', function() {
            it('forwards', function() {
              var xy = proj4(testPoint.code).forward(testPoint.ll);
              assert.closeTo(xy[0], testPoint.xy[0], xyEPSLN, 'x is close');
              assert.closeTo(xy[1], testPoint.xy[1], xyEPSLN, 'y is close');
            });
            it('inverse', function() {
              var ll = proj4(testPoint.code).inverse(testPoint.xy);
              assert.closeTo(ll[0], testPoint.ll[0], llEPSLN, 'x is close');
              assert.closeTo(ll[1], testPoint.ll[1], llEPSLN, 'y is close');
            });
          });
          describe('proj object', function() {
            it('should work with a 2 element array', function() {
              var xy = proj4(new proj4.Proj(testPoint.code), testPoint.ll);
              assert.closeTo(xy[0], testPoint.xy[0], xyEPSLN, 'x is close');
              assert.closeTo(xy[1], testPoint.xy[1], xyEPSLN, 'y is close');
            });
            it('should work on element', function() {
              var xy = proj4(new proj4.Proj(testPoint.code)).forward(testPoint.ll);
              assert.closeTo(xy[0], testPoint.xy[0], xyEPSLN, 'x is close');
              assert.closeTo(xy[1], testPoint.xy[1], xyEPSLN, 'y is close');
            });
            it('should work 3 element ponit object', function() {
              var pt = proj4.toPoint(testPoint.xy);
              var ll = proj4(new proj4.Proj(testPoint.code), proj4.WGS84, pt);
              assert.closeTo(ll.x, testPoint.ll[0], llEPSLN, 'x is close');
              assert.closeTo(ll.y, testPoint.ll[1], llEPSLN, 'y is close');
            });
          });
        });
      });
    });
    describe('points', function () {
      it('should ignore stuff it does not know', function () {
        var sweref99tm = '+proj=utm +zone=33 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs';
        var rt90 = '+lon_0=15.808277777799999 +lat_0=0.0 +k=1.0 +x_0=1500000.0 +y_0=0.0 +proj=tmerc +ellps=bessel +units=m +towgs84=414.1,41.3,603.1,-0.855,2.141,-7.023,0 +no_defs';
        var rslt = proj4(sweref99tm, rt90).forward({
          x: 319180,
          y: 6399862,
          z: 0,
          m: 1000,
          method: function () {
            return 'correct answer';
          }
        });
        assert.closeTo(rslt.x, 1271137.9275601401, 0.000001);
        assert.closeTo(rslt.y, 6404230.291459564, 0.000001);
        assert.equal(rslt.z, 0);
        assert.equal(rslt.m, 1000);
        assert.equal(rslt.method(), 'correct answer');
      });
      it('should be able to compute X Y Z M in geocenteric coordinates', function () {
        var epsg4978 = '+proj=geocent +datum=WGS84 +units=m +no_defs';
        var rslt = proj4(epsg4978).forward({
          x: -7.76166,
          y: 39.19685,
          z: 0,
          m: 1000,
          method: function () {
            return 'correct answer';
          }
        });
        assert.closeTo(rslt.x, 4904199.584207411, 0.000001);
        assert.closeTo(rslt.y, -668448.8153664203, 0.000001);
        assert.closeTo(rslt.z, 4009276.930771821, 0.000001);
        assert.equal(rslt.m, 1000);
        assert.equal(rslt.method(), 'correct answer');
      });
    });
    describe('points array', function () {
      it('should ignore stuff it does not know', function () {
        var sweref99tm = '+proj=utm +zone=33 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs';
        var rt90 = '+lon_0=15.808277777799999 +lat_0=0.0 +k=1.0 +x_0=1500000.0 +y_0=0.0 +proj=tmerc +ellps=bessel +units=m +towgs84=414.1,41.3,603.1,-0.855,2.141,-7.023,0 +no_defs';
        var rslt = proj4(sweref99tm, rt90).forward([
          319180,
          6399862,
          0,
          1000,
        ]);
        assert.closeTo(rslt[0], 1271137.9275601401, 0.000001);
        assert.closeTo(rslt[1], 6404230.291459564, 0.000001);
        assert.equal(rslt[2], 0);
        assert.equal(rslt[3], 1000);
      });
      it('should be able to compute X Y Z M in geocenteric coordinates', function () {
        var epsg4978 = '+proj=geocent +datum=WGS84 +units=m +no_defs';
        var rslt = proj4(epsg4978).forward([
          -7.76166,
          39.19685,
          0,
          1000
        ]);
        assert.closeTo(rslt[0], 4904199.584207411, 0.000001);
        assert.closeTo(rslt[1], -668448.8153664203, 0.000001);
        assert.closeTo(rslt[2], 4009276.930771821, 0.000001);
        assert.equal(rslt[3], 1000);
      });
    });

    it('should use correct axis order', function() {
      var enu = 'PROJCS["NAD83 / Massachusetts Mainland", GEOGCS["NAD83", DATUM["North American Datum 1983", SPHEROID["GRS 1980", 6378137.0, 298.257222101, AUTHORITY["EPSG","7019"]], TOWGS84[0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0], AUTHORITY["EPSG","6269"]], PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]], UNIT["degree", 0.017453292519943295], AXIS["Geodetic longitude", EAST], AXIS["Geodetic latitude", NORTH], AUTHORITY["EPSG","4269"]], PROJECTION["Lambert_Conformal_Conic_2SP", AUTHORITY["EPSG","9802"]], PARAMETER["central_meridian", -71.5], PARAMETER["latitude_of_origin", 41.0], PARAMETER["standard_parallel_1", 42.68333333333334], PARAMETER["false_easting", 200000.0], PARAMETER["false_northing", 750000.0], PARAMETER["scale_factor", 1.0], PARAMETER["standard_parallel_2", 41.71666666666667], UNIT["m", 1.0], AXIS["Easting", EAST], AXIS["Northing", NORTH], AUTHORITY["EPSG","26986"]]';
      var neu = 'PROJCS["NAD83 / Massachusetts Mainland NE", GEOGCS["NAD83", DATUM["North American Datum 1983", SPHEROID["GRS 1980", 6378137.0, 298.257222101, AUTHORITY["EPSG","7019"]], TOWGS84[0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0], AUTHORITY["EPSG","6269"]], PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]], UNIT["degree", 0.017453292519943295], AXIS["Geodetic latitude", NORTH], AXIS["Geodetic longitude", EAST], AUTHORITY["EPSG","4269"]], PROJECTION["Lambert_Conformal_Conic_2SP", AUTHORITY["EPSG","9802"]], PARAMETER["central_meridian", -71.5], PARAMETER["latitude_of_origin", 41.0], PARAMETER["standard_parallel_1", 42.68333333333334], PARAMETER["false_easting", 200000.0], PARAMETER["false_northing", 750000.0], PARAMETER["scale_factor", 1.0], PARAMETER["standard_parallel_2", 41.71666666666667], UNIT["m", 1.0], AXIS["Northing", NORTH], AXIS["Easting", EAST], AUTHORITY["EPSG","26986"]]';
      var rslt = proj4(enu, neu).forward({
        x: 10.2,
        y: 43.4
      });
      assert.closeTo(rslt.x, 43.4, 0.000001);
      assert.closeTo(rslt.y, 10.2, 0.000001);
    });

    describe('defs', function () {
      assert.equal(proj4.defs('testmerc'), proj4.defs['testmerc']);
      proj4.defs('foo', '+proj=merc +lon_0=5.937 +lat_ts=45.027 +ellps=sphere');
      assert.typeOf(proj4.defs['foo'], 'object');
      proj4.defs('urn:x-ogc:def:crs:EPSG:4326', proj4.defs('EPSG:4326'));
      assert.strictEqual(proj4.defs['urn:x-ogc:def:crs:EPSG:4326'], proj4.defs['EPSG:4326']);

      describe('wkt', function () {
        it('should provide the correct conversion factor for WKT GEOGCS projections', function () {
          proj4.defs('EPSG:4269', 'GEOGCS["NAD83",DATUM["North_American_Datum_1983",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6269"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4269"]]');
          assert.equal(proj4.defs['EPSG:4269'].to_meter, 6378137 * 0.01745329251994328);

          proj4.defs('EPSG:4279', 'GEOGCS["OS(SN)80",DATUM["OS_SN_1980",SPHEROID["Airy 1830",6377563.396,299.3249646,AUTHORITY["EPSG","7001"]],AUTHORITY["EPSG","6279"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4279"]]');
          assert.equal(proj4.defs['EPSG:4279'].to_meter, 6377563.396 * 0.01745329251994328);
        });
        it('should parse wkt and proj4 of the same crs and result in the same params', function () {
          var s1 = 'GEOGCS["PSD93",DATUM["PDO_Survey_Datum_1993",SPHEROID["Clarke 1880 (RGS)",6378249.145,293.465,AUTHORITY["EPSG","7012"]],TOWGS84[-180.624,-225.516,173.919,-0.81,-1.898,8.336,16.7101],AUTHORITY["EPSG","6134"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4134"]]';
          var s2 = '+proj=longlat +ellps=clrk80 +towgs84=-180.624,-225.516,173.919,-0.81,-1.898,8.336,16.7101 +no_defs';
          var crs1 = proj4(s1);
          var crs2 = proj4(s2);
          assert.equal(crs1.oProj.a, crs2.oProj.a);
          // proj4 has different ellipsoid parameters that EPSG: http://epsg.io/4134
          // assert.equal(crs1.oProj.b, crs2.oProj.b);
        });
        it('should handled defined points correctly', function () {
          var prj = '+proj=utm +zone=31';
          var proj = proj4(prj);
          var res = proj.forward([3, 0]);
          assert.deepEqual(res, [500000, 0]);
        });
      });
    });
    describe('errors', function() {
      it('should throw an error for an unknown ref', function() {
        assert.throws(function() {
          new proj4.Proj('fake one');
        }, 'fake one', 'should work');
      });
      it('should throw when passed null', function() {
        assert.throws(function() {
            proj4('+proj=utm +zone=31', [null, 0]);
        }, 'coordinates must be finite numbers', 'should work');
      });
      it('should throw when passed NaN', function() {
        assert.throws(function() {
            proj4('+proj=utm +zone=31', [0, NaN]);
        }, 'coordinates must be finite numbers', 'should work');
      });
      it('should throw when passed Infinity', function() {
        assert.throws(function() {
            proj4('+proj=utm +zone=31', [Infinity, 0]);
        }, 'coordinates must be finite numbers', 'should work');
      });
      it('should throw when passed -Infinity', function() {
        assert.throws(function() {
            proj4('+proj=utm +zone=31', [-Infinity, 0]);
        }, 'coordinates must be finite numbers', 'should work');
      });
    });
    describe('utility', function() {
      it('should have MGRS available in the proj4.util namespace', function() {
        assert.typeOf(proj4.mgrs, "object", "MGRS available in the proj4.util namespace");
      });
      it('should have fromMGRS method added to proj4.Point prototype', function() {
        assert.typeOf(proj4.Point.fromMGRS, "function", "fromMGRS method added to proj4.Point prototype");
      });
      it('should have toMGRS method added to proj4.Point prototype', function() {
        assert.typeOf(proj4.Point.prototype.toMGRS, "function", "toMGRS method added to proj4.Point prototype");
      });

      describe('First MGRS set', function() {
        var mgrs = "33UXP04";
        var point = proj4.Point.fromMGRS(mgrs);
        it('Longitude of point from MGRS correct.', function() {
          assert.equal(point.x.toPrecision(7), "16.41450", "Longitude of point from MGRS correct.");
        });
        it('Latitude of point from MGRS correct.', function() {
          assert.equal(point.y.toPrecision(7), "48.24949", "Latitude of point from MGRS correct.");
        });
        it('MGRS reference with highest accuracy correct.', function() {
          assert.equal(point.toMGRS(), "33UXP0500444998", "MGRS reference with highest accuracy correct.");
        });
        it('MGRS reference with 1-digit accuracy correct.', function() {
          assert.equal(point.toMGRS(1), mgrs, "MGRS reference with 1-digit accuracy correct.");
        });
      });
      describe('Second MGRS set', function() {
        var mgrs = "24XWT783908"; // near UTM zone border, so there are two ways to reference this
        var point = proj4.Point.fromMGRS(mgrs);
        it("Longitude of point from MGRS correct.", function() {
          assert.equal(point.x.toPrecision(7), "-32.66433", "Longitude of point from MGRS correct.");
        });
        it("Latitude of point from MGRS correct.", function() {
          assert.equal(point.y.toPrecision(7), "83.62778", "Latitude of point from MGRS correct.");
        });
        it("MGRS reference with 3-digit accuracy correct.", function() {
          assert.equal(point.toMGRS(3), "25XEN041865", "MGRS reference with 3-digit accuracy correct.");
        });
      });
      describe('Defs and Datum definition', function() {
        proj4.defs("EPSG:5514", "+proj=krovak +lat_0=49.5 +lon_0=24.83333333333333 +alpha=30.28813972222222 +k=0.9999 +x_0=0 +y_0=0 +ellps=bessel +pm=greenwich +units=m +no_defs +towgs84=570.8,85.7,462.8,4.998,1.587,5.261,3.56");
        var point = proj4.transform(proj4.Proj("WGS84"), proj4.Proj("EPSG:5514"),
                                proj4.toPoint([12.806988, 49.452262]));
        it("Longitude of point from WGS84 correct.", function() {
          assert.equal(point.x.toPrecision(8), "-868208.61", "Longitude of point from WGS84 correct.");
        });
        it("Latitude of point from WGS84 correct.", function() {
          assert.equal(point.y.toPrecision(9), "-1095793.64", "Latitude of point from WGS84 correct.");
        });
        var point2 = proj4.transform(proj4.Proj("WGS84"), proj4.Proj("EPSG:5514"),
                                proj4.toPoint([12.806988, 49.452262]));
        it("Longitude of point from WGS84 with second call for EPSG:5514 correct.", function() {
          assert.equal(point2.x.toPrecision(8), "-868208.61", "Longitude of point from WGS84 correct.");
        });
        it("Latitude of point from WGS84 with second call for EPSG:5514 correct.", function() {
          assert.equal(point2.y.toPrecision(9), "-1095793.64", "Latitude of point from WGS84 correct.");
        });
      });
    });

  });
}
if(typeof process !== 'undefined'&&process.toString() === '[object process]'){
  (function(){
    startTests(require('chai'), require('../dist/proj4-src'), require('./testData'));
  })();
}
