// ============================================================================
// Copyright © 2026 Hexagon Technology Center GmbH. All Rights Reserved.
// 文件名: MirrorProcessor.cs
// 描述: 镜像算子，用于图像翻转
// 功能:
//   - 水平镜像（左右翻转）
//   - 垂直镜像（上下翻转）
//   - 对角镜像（水平+垂直翻转，等效180°旋转）
// 算法: 像素坐标映射
// 作者: 李伟 wei.lw.li@hexagon.com
// ============================================================================

using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Structure;
using XP.ImageProcessing.Core;
using Serilog;

namespace XP.ImageProcessing.Processors;

/// <summary>
/// 镜像算子
/// </summary>
public class MirrorProcessor : ImageProcessorBase
{
    private static readonly ILogger _logger = Log.ForContext<MirrorProcessor>();

    public MirrorProcessor()
    {
        Name = LocalizationHelper.GetString("MirrorProcessor_Name");
        Description = LocalizationHelper.GetString("MirrorProcessor_Description");
    }

    protected override void InitializeParameters()
    {
        Parameters.Add("Direction", new ProcessorParameter(
            "Direction",
            LocalizationHelper.GetString("MirrorProcessor_Direction"),
            typeof(string),
            "Horizontal",
            null,
            null,
            LocalizationHelper.GetString("MirrorProcessor_Direction_Desc"),
            new string[] { "Horizontal", "Vertical", "Both" }));

        _logger.Debug("InitializeParameters");
    }

    public override Image<Gray, byte> Process(Image<Gray, byte> inputImage)
    {
        string direction = GetParameter<string>("Direction");

        var result = inputImage.Clone();

        FlipType flipType = direction switch
        {
            "Vertical" => FlipType.Vertical,
            "Both" => FlipType.Both,
            _ => FlipType.Horizontal
        };

        CvInvoke.Flip(inputImage, result, flipType);

        _logger.Debug("Process: Direction = {Direction}", direction);
        return result;
    }
}