/**
 * Cesium - https://github.com/CesiumGS/cesium
 *
 * Copyright 2011-2020 Cesium Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Columbus View (Pat. Pend.)
 *
 * Portions licensed separately.
 * See https://github.com/CesiumGS/cesium/blob/master/LICENSE.md for full licensing details.
 */

define(['./when-54c2dc71', './Check-6c0211bc', './Math-1124a290', './Cartesian2-33d2657c', './Transforms-8be64844', './RuntimeError-2109023a', './WebGLConstants-76bb35d1', './ComponentDatatype-a26dd044', './GeometryAttribute-e9a8b203', './GeometryAttributes-4fcfcf40', './AttributeCompression-75249b5e', './GeometryPipeline-466ad516', './EncodedCartesian3-6c97231d', './IndexDatatype-25023891', './IntersectionTests-afc38163', './Plane-fa30fc46', './VertexFormat-4d8b817a', './GeometryInstance-8c9b4df5', './arrayRemoveDuplicates-0263f42c', './BoundingRectangle-dede91e8', './EllipsoidTangentPlane-ce6e380f', './OrientedBoundingBox-8897f474', './CoplanarPolygonGeometryLibrary-f703c864', './ArcType-dc1c5aee', './EllipsoidRhumbLine-5f1492e5', './PolygonPipeline-9f9b7763', './PolygonGeometryLibrary-98a03962'], function (when, Check, _Math, Cartesian2, Transforms, RuntimeError, WebGLConstants, ComponentDatatype, GeometryAttribute, GeometryAttributes, AttributeCompression, GeometryPipeline, EncodedCartesian3, IndexDatatype, IntersectionTests, Plane, VertexFormat, GeometryInstance, arrayRemoveDuplicates, BoundingRectangle, EllipsoidTangentPlane, OrientedBoundingBox, CoplanarPolygonGeometryLibrary, ArcType, EllipsoidRhumbLine, PolygonPipeline, PolygonGeometryLibrary) { 'use strict';

  var scratchPosition = new Cartesian2.Cartesian3();
  var scratchBR = new BoundingRectangle.BoundingRectangle();
  var stScratch = new Cartesian2.Cartesian2();
  var textureCoordinatesOrigin = new Cartesian2.Cartesian2();
  var scratchNormal = new Cartesian2.Cartesian3();
  var scratchTangent = new Cartesian2.Cartesian3();
  var scratchBitangent = new Cartesian2.Cartesian3();
  var centerScratch = new Cartesian2.Cartesian3();
  var axis1Scratch = new Cartesian2.Cartesian3();
  var axis2Scratch = new Cartesian2.Cartesian3();
  var quaternionScratch = new Transforms.Quaternion();
  var textureMatrixScratch = new Transforms.Matrix3();
  var tangentRotationScratch = new Transforms.Matrix3();
  var surfaceNormalScratch = new Cartesian2.Cartesian3();

  function createGeometryFromPolygon(
    polygon,
    vertexFormat,
    boundingRectangle,
    stRotation,
    projectPointTo2D,
    normal,
    tangent,
    bitangent
  ) {
    var positions = polygon.positions;
    var indices = PolygonPipeline.PolygonPipeline.triangulate(polygon.positions2D, polygon.holes);

    /* If polygon is completely unrenderable, just use the first three vertices */
    if (indices.length < 3) {
      indices = [0, 1, 2];
    }

    var newIndices = IndexDatatype.IndexDatatype.createTypedArray(
      positions.length,
      indices.length
    );
    newIndices.set(indices);

    var textureMatrix = textureMatrixScratch;
    if (stRotation !== 0.0) {
      var rotation = Transforms.Quaternion.fromAxisAngle(
        normal,
        stRotation,
        quaternionScratch
      );
      textureMatrix = Transforms.Matrix3.fromQuaternion(rotation, textureMatrix);

      if (vertexFormat.tangent || vertexFormat.bitangent) {
        rotation = Transforms.Quaternion.fromAxisAngle(
          normal,
          -stRotation,
          quaternionScratch
        );
        var tangentRotation = Transforms.Matrix3.fromQuaternion(
          rotation,
          tangentRotationScratch
        );

        tangent = Cartesian2.Cartesian3.normalize(
          Transforms.Matrix3.multiplyByVector(tangentRotation, tangent, tangent),
          tangent
        );
        if (vertexFormat.bitangent) {
          bitangent = Cartesian2.Cartesian3.normalize(
            Cartesian2.Cartesian3.cross(normal, tangent, bitangent),
            bitangent
          );
        }
      }
    } else {
      textureMatrix = Transforms.Matrix3.clone(Transforms.Matrix3.IDENTITY, textureMatrix);
    }

    var stOrigin = textureCoordinatesOrigin;
    if (vertexFormat.st) {
      stOrigin.x = boundingRectangle.x;
      stOrigin.y = boundingRectangle.y;
    }

    var length = positions.length;
    var size = length * 3;
    var flatPositions = new Float64Array(size);
    var normals = vertexFormat.normal ? new Float32Array(size) : undefined;
    var tangents = vertexFormat.tangent ? new Float32Array(size) : undefined;
    var bitangents = vertexFormat.bitangent ? new Float32Array(size) : undefined;
    var textureCoordinates = vertexFormat.st
      ? new Float32Array(length * 2)
      : undefined;

    var positionIndex = 0;
    var normalIndex = 0;
    var bitangentIndex = 0;
    var tangentIndex = 0;
    var stIndex = 0;

    for (var i = 0; i < length; i++) {
      var position = positions[i];
      flatPositions[positionIndex++] = position.x;
      flatPositions[positionIndex++] = position.y;
      flatPositions[positionIndex++] = position.z;

      if (vertexFormat.st) {
        var p = Transforms.Matrix3.multiplyByVector(
          textureMatrix,
          position,
          scratchPosition
        );
        var st = projectPointTo2D(p, stScratch);
        Cartesian2.Cartesian2.subtract(st, stOrigin, st);

        var stx = _Math.CesiumMath.clamp(st.x / boundingRectangle.width, 0, 1);
        var sty = _Math.CesiumMath.clamp(st.y / boundingRectangle.height, 0, 1);
        textureCoordinates[stIndex++] = stx;
        textureCoordinates[stIndex++] = sty;
      }

      if (vertexFormat.normal) {
        normals[normalIndex++] = normal.x;
        normals[normalIndex++] = normal.y;
        normals[normalIndex++] = normal.z;
      }

      if (vertexFormat.tangent) {
        tangents[tangentIndex++] = tangent.x;
        tangents[tangentIndex++] = tangent.y;
        tangents[tangentIndex++] = tangent.z;
      }

      if (vertexFormat.bitangent) {
        bitangents[bitangentIndex++] = bitangent.x;
        bitangents[bitangentIndex++] = bitangent.y;
        bitangents[bitangentIndex++] = bitangent.z;
      }
    }

    var attributes = new GeometryAttributes.GeometryAttributes();

    if (vertexFormat.position) {
      attributes.position = new GeometryAttribute.GeometryAttribute({
        componentDatatype: ComponentDatatype.ComponentDatatype.DOUBLE,
        componentsPerAttribute: 3,
        values: flatPositions,
      });
    }

    if (vertexFormat.normal) {
      attributes.normal = new GeometryAttribute.GeometryAttribute({
        componentDatatype: ComponentDatatype.ComponentDatatype.FLOAT,
        componentsPerAttribute: 3,
        values: normals,
      });
    }

    if (vertexFormat.tangent) {
      attributes.tangent = new GeometryAttribute.GeometryAttribute({
        componentDatatype: ComponentDatatype.ComponentDatatype.FLOAT,
        componentsPerAttribute: 3,
        values: tangents,
      });
    }

    if (vertexFormat.bitangent) {
      attributes.bitangent = new GeometryAttribute.GeometryAttribute({
        componentDatatype: ComponentDatatype.ComponentDatatype.FLOAT,
        componentsPerAttribute: 3,
        values: bitangents,
      });
    }

    if (vertexFormat.st) {
      attributes.st = new GeometryAttribute.GeometryAttribute({
        componentDatatype: ComponentDatatype.ComponentDatatype.FLOAT,
        componentsPerAttribute: 2,
        values: textureCoordinates,
      });
    }

    return new GeometryAttribute.Geometry({
      attributes: attributes,
      indices: newIndices,
      primitiveType: GeometryAttribute.PrimitiveType.TRIANGLES,
    });
  }

  /**
   * A description of a polygon composed of arbitrary coplanar positions.
   *
   * @alias CoplanarPolygonGeometry
   * @constructor
   *
   * @param {Object} options Object with the following properties:
   * @param {PolygonHierarchy} options.polygonHierarchy A polygon hierarchy that can include holes.
   * @param {Number} [options.stRotation=0.0] The rotation of the texture coordinates, in radians. A positive rotation is counter-clockwise.
   * @param {VertexFormat} [options.vertexFormat=VertexFormat.DEFAULT] The vertex attributes to be computed.
   * @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid to be used as a reference.
   *
   * @example
   * var polygon = new Cesium.CoplanarPolygonGeometry({
   *   positions : Cesium.Cartesian3.fromDegreesArrayHeights([
   *      -90.0, 30.0, 0.0,
   *      -90.0, 30.0, 1000.0,
   *      -80.0, 30.0, 1000.0,
   *      -80.0, 30.0, 0.0
   *   ])
   * });
   * var geometry = Cesium.CoplanarPolygonGeometry.createGeometry(polygon);
   *
   * @see CoplanarPolygonGeometry.createGeometry
   */
  function CoplanarPolygonGeometry(options) {
    options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);
    var polygonHierarchy = options.polygonHierarchy;
    //>>includeStart('debug', pragmas.debug);
    Check.Check.defined("options.polygonHierarchy", polygonHierarchy);
    //>>includeEnd('debug');

    var vertexFormat = when.defaultValue(options.vertexFormat, VertexFormat.VertexFormat.DEFAULT);
    this._vertexFormat = VertexFormat.VertexFormat.clone(vertexFormat);
    this._polygonHierarchy = polygonHierarchy;
    this._stRotation = when.defaultValue(options.stRotation, 0.0);
    this._ellipsoid = Cartesian2.Ellipsoid.clone(
      when.defaultValue(options.ellipsoid, Cartesian2.Ellipsoid.WGS84)
    );
    this._workerName = "createCoplanarPolygonGeometry";

    /**
     * The number of elements used to pack the object into an array.
     * @type {Number}
     */
    this.packedLength =
      PolygonGeometryLibrary.PolygonGeometryLibrary.computeHierarchyPackedLength(polygonHierarchy) +
      VertexFormat.VertexFormat.packedLength +
      Cartesian2.Ellipsoid.packedLength +
      2;
  }

  /**
   * A description of a coplanar polygon from an array of positions.
   *
   * @param {Object} options Object with the following properties:
   * @param {Cartesian3[]} options.positions An array of positions that defined the corner points of the polygon.
   * @param {VertexFormat} [options.vertexFormat=VertexFormat.DEFAULT] The vertex attributes to be computed.
   * @param {Number} [options.stRotation=0.0] The rotation of the texture coordinates, in radians. A positive rotation is counter-clockwise.
   * @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid to be used as a reference.
   * @returns {CoplanarPolygonGeometry}
   *
   * @example
   * // create a polygon from points
   * var polygon = Cesium.CoplanarPolygonGeometry.fromPositions({
   *   positions : Cesium.Cartesian3.fromDegreesArray([
   *     -72.0, 40.0,
   *     -70.0, 35.0,
   *     -75.0, 30.0,
   *     -70.0, 30.0,
   *     -68.0, 40.0
   *   ])
   * });
   * var geometry = Cesium.PolygonGeometry.createGeometry(polygon);
   *
   * @see PolygonGeometry#createGeometry
   */
  CoplanarPolygonGeometry.fromPositions = function (options) {
    options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);

    //>>includeStart('debug', pragmas.debug);
    Check.Check.defined("options.positions", options.positions);
    //>>includeEnd('debug');

    var newOptions = {
      polygonHierarchy: {
        positions: options.positions,
      },
      vertexFormat: options.vertexFormat,
      stRotation: options.stRotation,
      ellipsoid: options.ellipsoid,
    };
    return new CoplanarPolygonGeometry(newOptions);
  };

  /**
   * Stores the provided instance into the provided array.
   *
   * @param {CoplanarPolygonGeometry} value The value to pack.
   * @param {Number[]} array The array to pack into.
   * @param {Number} [startingIndex=0] The index into the array at which to start packing the elements.
   *
   * @returns {Number[]} The array that was packed into
   */
  CoplanarPolygonGeometry.pack = function (value, array, startingIndex) {
    //>>includeStart('debug', pragmas.debug);
    Check.Check.typeOf.object("value", value);
    Check.Check.defined("array", array);
    //>>includeEnd('debug');

    startingIndex = when.defaultValue(startingIndex, 0);

    startingIndex = PolygonGeometryLibrary.PolygonGeometryLibrary.packPolygonHierarchy(
      value._polygonHierarchy,
      array,
      startingIndex
    );

    Cartesian2.Ellipsoid.pack(value._ellipsoid, array, startingIndex);
    startingIndex += Cartesian2.Ellipsoid.packedLength;

    VertexFormat.VertexFormat.pack(value._vertexFormat, array, startingIndex);
    startingIndex += VertexFormat.VertexFormat.packedLength;

    array[startingIndex++] = value._stRotation;
    array[startingIndex] = value.packedLength;

    return array;
  };

  var scratchEllipsoid = Cartesian2.Ellipsoid.clone(Cartesian2.Ellipsoid.UNIT_SPHERE);
  var scratchVertexFormat = new VertexFormat.VertexFormat();
  var scratchOptions = {
    polygonHierarchy: {},
  };
  /**
   * Retrieves an instance from a packed array.
   *
   * @param {Number[]} array The packed array.
   * @param {Number} [startingIndex=0] The starting index of the element to be unpacked.
   * @param {CoplanarPolygonGeometry} [result] The object into which to store the result.
   * @returns {CoplanarPolygonGeometry} The modified result parameter or a new CoplanarPolygonGeometry instance if one was not provided.
   */
  CoplanarPolygonGeometry.unpack = function (array, startingIndex, result) {
    //>>includeStart('debug', pragmas.debug);
    Check.Check.defined("array", array);
    //>>includeEnd('debug');

    startingIndex = when.defaultValue(startingIndex, 0);

    var polygonHierarchy = PolygonGeometryLibrary.PolygonGeometryLibrary.unpackPolygonHierarchy(
      array,
      startingIndex
    );
    startingIndex = polygonHierarchy.startingIndex;
    delete polygonHierarchy.startingIndex;

    var ellipsoid = Cartesian2.Ellipsoid.unpack(array, startingIndex, scratchEllipsoid);
    startingIndex += Cartesian2.Ellipsoid.packedLength;

    var vertexFormat = VertexFormat.VertexFormat.unpack(
      array,
      startingIndex,
      scratchVertexFormat
    );
    startingIndex += VertexFormat.VertexFormat.packedLength;

    var stRotation = array[startingIndex++];
    var packedLength = array[startingIndex];

    if (!when.defined(result)) {
      result = new CoplanarPolygonGeometry(scratchOptions);
    }

    result._polygonHierarchy = polygonHierarchy;
    result._ellipsoid = Cartesian2.Ellipsoid.clone(ellipsoid, result._ellipsoid);
    result._vertexFormat = VertexFormat.VertexFormat.clone(vertexFormat, result._vertexFormat);
    result._stRotation = stRotation;
    result.packedLength = packedLength;
    return result;
  };

  /**
   * Computes the geometric representation of an arbitrary coplanar polygon, including its vertices, indices, and a bounding sphere.
   *
   * @param {CoplanarPolygonGeometry} polygonGeometry A description of the polygon.
   * @returns {Geometry|undefined} The computed vertices and indices.
   */
  CoplanarPolygonGeometry.createGeometry = function (polygonGeometry) {
    var vertexFormat = polygonGeometry._vertexFormat;
    var polygonHierarchy = polygonGeometry._polygonHierarchy;
    var stRotation = polygonGeometry._stRotation;

    var outerPositions = polygonHierarchy.positions;
    outerPositions = arrayRemoveDuplicates.arrayRemoveDuplicates(
      outerPositions,
      Cartesian2.Cartesian3.equalsEpsilon,
      true
    );
    if (outerPositions.length < 3) {
      return;
    }

    var normal = scratchNormal;
    var tangent = scratchTangent;
    var bitangent = scratchBitangent;
    var axis1 = axis1Scratch;
    var axis2 = axis2Scratch;

    var validGeometry = CoplanarPolygonGeometryLibrary.CoplanarPolygonGeometryLibrary.computeProjectTo2DArguments(
      outerPositions,
      centerScratch,
      axis1,
      axis2
    );
    if (!validGeometry) {
      return undefined;
    }

    normal = Cartesian2.Cartesian3.cross(axis1, axis2, normal);
    normal = Cartesian2.Cartesian3.normalize(normal, normal);

    if (
      !Cartesian2.Cartesian3.equalsEpsilon(
        centerScratch,
        Cartesian2.Cartesian3.ZERO,
        _Math.CesiumMath.EPSILON6
      )
    ) {
      var surfaceNormal = polygonGeometry._ellipsoid.geodeticSurfaceNormal(
        centerScratch,
        surfaceNormalScratch
      );
      if (Cartesian2.Cartesian3.dot(normal, surfaceNormal) < 0) {
        normal = Cartesian2.Cartesian3.negate(normal, normal);
        axis1 = Cartesian2.Cartesian3.negate(axis1, axis1);
      }
    }

    var projectPoints = CoplanarPolygonGeometryLibrary.CoplanarPolygonGeometryLibrary.createProjectPointsTo2DFunction(
      centerScratch,
      axis1,
      axis2
    );
    var projectPoint = CoplanarPolygonGeometryLibrary.CoplanarPolygonGeometryLibrary.createProjectPointTo2DFunction(
      centerScratch,
      axis1,
      axis2
    );

    if (vertexFormat.tangent) {
      tangent = Cartesian2.Cartesian3.clone(axis1, tangent);
    }
    if (vertexFormat.bitangent) {
      bitangent = Cartesian2.Cartesian3.clone(axis2, bitangent);
    }

    var results = PolygonGeometryLibrary.PolygonGeometryLibrary.polygonsFromHierarchy(
      polygonHierarchy,
      projectPoints,
      false
    );
    var hierarchy = results.hierarchy;
    var polygons = results.polygons;

    if (hierarchy.length === 0) {
      return;
    }
    outerPositions = hierarchy[0].outerRing;

    var boundingSphere = Transforms.BoundingSphere.fromPoints(outerPositions);
    var boundingRectangle = PolygonGeometryLibrary.PolygonGeometryLibrary.computeBoundingRectangle(
      normal,
      projectPoint,
      outerPositions,
      stRotation,
      scratchBR
    );

    var geometries = [];
    for (var i = 0; i < polygons.length; i++) {
      var geometryInstance = new GeometryInstance.GeometryInstance({
        geometry: createGeometryFromPolygon(
          polygons[i],
          vertexFormat,
          boundingRectangle,
          stRotation,
          projectPoint,
          normal,
          tangent,
          bitangent
        ),
      });

      geometries.push(geometryInstance);
    }

    var geometry = GeometryPipeline.GeometryPipeline.combineInstances(geometries)[0];
    geometry.attributes.position.values = new Float64Array(
      geometry.attributes.position.values
    );
    geometry.indices = IndexDatatype.IndexDatatype.createTypedArray(
      geometry.attributes.position.values.length / 3,
      geometry.indices
    );

    var attributes = geometry.attributes;
    if (!vertexFormat.position) {
      delete attributes.position;
    }
    return new GeometryAttribute.Geometry({
      attributes: attributes,
      indices: geometry.indices,
      primitiveType: geometry.primitiveType,
      boundingSphere: boundingSphere,
    });
  };

  function createCoplanarPolygonGeometry(polygonGeometry, offset) {
    if (when.defined(offset)) {
      polygonGeometry = CoplanarPolygonGeometry.unpack(polygonGeometry, offset);
    }
    return CoplanarPolygonGeometry.createGeometry(polygonGeometry);
  }

  return createCoplanarPolygonGeometry;

});
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