using System;
using System.ComponentModel;
using System.Xml.Serialization;
using Deltares.Geometry;
using Deltares.Geotechnics;
using Deltares.Geotechnics.GeotechnicalGeometry;
using Deltares.Standard;
using Deltares.Standard.Attributes;
using Deltares.Standard.Units;

namespace Deltares.DeltaModel
{
    /// <summary>
    /// A <see cref="SurfaceLineRevetmentSegment"/> is a <see cref="RevetmentSegment"/> which's Z is dependent on a 
    /// <see cref="LocalizedGeometryPointString"/>.
    /// </summary>
    public abstract class SurfaceLineRevetmentSegment : RevetmentSegment
    {
        private IHasSurfaceLine surfaceLineProvider;

        protected SurfaceLineRevetmentSegment() {}

        /// <summary>
        /// Constructor.
        /// </summary>
        /// <param name="surfaceLineProvider"></param>
        protected SurfaceLineRevetmentSegment(IHasSurfaceLine surfaceLineProvider)
        {
            SurfaceLineProvider = surfaceLineProvider;
        }

        /// <summary>
        /// The parent dike location.
        /// </summary>
        /// <remarks>Surface line provider must be set by owner (during deserialization).</remarks>
        [Browsable(false)]
        [ReadOnly(true)]
        public IHasSurfaceLine SurfaceLineProvider
        {
            get
            {
                return surfaceLineProvider;
            }
            set
            {
                surfaceLineProvider = value;
            }
        }

        /// <summary>
        /// The X coordinate of the start point.
        /// </summary>
        /// <summary>
        /// Gets the Z coordinate of the start point based on <see cref="StartX"/> and <see cref="RevetmentSegment.SurfaceLineProvider"/>.
        /// </summary>
        [Format("F2")]
        [Unit(UnitType.Length)]
        [PropertyOrder(1, 2)]
        [XmlIgnore]
        public double StartZ
        {
            get
            {
                return null == SurfaceLineProvider || null == SurfaceLineProvider.SurfaceLine ? Double.NaN : SurfaceLineProvider.SurfaceLine.GetZAtX(StartX);
            }
        }

        /// <summary>
        /// Gets the Z coordinate of the end point based on <see cref="EndX"/> and <see cref="RevetmentSegment.SurfaceLineProvider"/>.
        /// </summary>
        [Format("F2")]
        [Unit(UnitType.Length)]
        [PropertyOrder(1, 4)]
        [XmlIgnore]
        public double EndZ
        {
            get
            {
                return null == SurfaceLineProvider || null == SurfaceLineProvider.SurfaceLine ? Double.NaN : SurfaceLineProvider.SurfaceLine.GetZAtX(EndX);
            }
        }

        public LocalizedGeometryPointString GetSurfaceLine()
        {
            return SurfaceLineProvider != null ? SurfaceLineProvider.SurfaceLine : null;
        }

        /// <summary>
        /// Returns the geometry bounds.
        /// </summary>
        public override GeometryBounds GetGeometryBounds()
        {
            GeometryBounds bounds = null;

            if (!Double.IsNaN(StartX) && !Double.IsNaN(EndX))
            {
                var beginPoint = new GeometryPoint(StartX, 0, StartZ);
                var endPoint = new GeometryPoint(EndX, 0, EndZ);

                bounds = beginPoint.GetGeometryBounds() + endPoint.GetGeometryBounds();
            }

            if (Double.IsNaN(StartX) && !Double.IsNaN(EndX))
            {
                bounds = new GeometryPoint(EndX, 0, EndZ).GetGeometryBounds();
            }

            if (Double.IsNaN(EndX) && !Double.IsNaN(StartX))
            {
                bounds = new GeometryPoint(StartX, 0, StartZ).GetGeometryBounds();
            }

            return bounds;
        }
    }
}