/*
  * Copyright (c) 2025 LG Electronics Inc.
   * SPDX-License-Identifier: LicenseRef-LGE-Proprietary
   */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace VisionCommon {
    /// <summary>
    /// 원점, 각도, 길이로 구성되는 십자가
    /// </summary>
    public class Cross : ICloneable {
        private const int DEFAULT_LENGTH = 50;

        /// <summary>원점</summary>
        public ImagePoint Origin { get; set; }

        /// <summary>각도</summary>
        public Angle Angle { get; set; }

        /// <summary>수직/수평 길이</summary>
        public double Length { get; set; }

        /// <summary>수직 라인</summary>
        public Line<ImagePoint> VerticalLine {
            get {
                var offset = new ImagePoint(Length, 0);
                var p1 = Origin - offset;
                var p2 = Origin + offset;

                return new Line<ImagePoint>(
                    MathUtil.Rotate(p1, Angle, Origin) as ImagePoint,
                    MathUtil.Rotate(p2, Angle, Origin) as ImagePoint);
            }
        }

        /// <summary>수평 라인</summary>
        public Line<ImagePoint> HorizontalLine {
            get {
                var offset = new ImagePoint(0, Length);
                var p1 = Origin - offset;
                var p2 = Origin + offset;

                return new Line<ImagePoint>(
                    MathUtil.Rotate(p1, Angle, Origin) as ImagePoint,
                    MathUtil.Rotate(p2, Angle, Origin) as ImagePoint);
            }
        }


        /// <summary>
        /// 생성자
        /// </summary>
        /// <param name="origin">원점</param>
        public Cross(ImagePoint origin)
            : this(origin, new Angle(), DEFAULT_LENGTH) {
        }

        /// <summary>
        /// 생성자
        /// </summary>
        /// <param name="origin">원점</param>
        /// <param name="length">수직/수평 길이</param>
        public Cross(ImagePoint origin, double length)
            : this(origin, new Angle(), length) {
        }

        /// <summary>
        /// 생성자
        /// </summary>
        /// <param name="origin">원점</param>
        /// <param name="angle">각도</param>
        public Cross(ImagePoint origin, Angle angle)
            : this(origin, angle, DEFAULT_LENGTH) {
        }

        /// <summary>
        /// 생성자
        /// </summary>
        /// <param name="origin">원점</param>
        /// <param name="angle">각도</param>
        /// <param name="length">수직/수평 길이</param>
        public Cross(ImagePoint origin, Angle angle, double length) {
            Origin = origin;
            Angle = angle;
            Length = length;
        }

        public override bool Equals(object obj) {
            return Equals(obj as Cross);
        }

        public bool Equals(Cross cross) {
            if (cross is null) {
                return false;
            }

            if (Object.ReferenceEquals(this, cross)) {
                return true;
            }

            return this.Origin.Equals(cross.Origin)
                && this.Angle.Equals(cross.Angle)
                && this.Length == cross.Length;
        }

        public override int GetHashCode() {
            return Origin.GetHashCode() ^ Angle.GetHashCode() ^ Length.GetHashCode();
        }

        public object Clone() {
            return new Cross(
                Origin.Clone() as ImagePoint,
                Angle.Clone() as Angle,
                Length);
        }
    }
}