using CaeGlobals;
using DynamicTypeDescriptor;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing.Design;
using System.IO;
using System.Linq;
using System.Windows.Forms;
using System.Windows.Forms.Design;
using CPSO.Settings;

namespace CPSO.Forms
{
    [Serializable]
    public class ViewRBFMorphing : IViewSettings, IReset
    {
        private PythonSettings _pythonSettings;
        // ReSharper disable once IdentifierTypo
        private readonly DynamicCustomTypeDescriptor _dctd = null;

        [Category("Python环境")]
        [OrderedDisplayName(0, 10, "Conda目录")]
        [Description("指定Anaconda或者Minicoda本地安装中activate.bat所在目录.")]
        [Editor(typeof(BatFileNameEditor), typeof(UITypeEditor))]
        public string CondaActivateBat
        {
            get => _pythonSettings.CondaPath;
            set => _pythonSettings.CondaPath = value;
        }

        [Category("Python环境")]
        [OrderedDisplayName(1, 10, "虚拟环境")]
        [Description("选择要激活的虚拟环境.")]
        [TypeConverter(typeof(DynamicListConverter))]
        public string Environment
        {
            get => _pythonSettings.CondaEnvironment;
            set => _pythonSettings.CondaEnvironment = value;
        }

        [Category("Python环境")]
        [OrderedDisplayName(2, 10, "脚本文件")]
        [Description("指定Python脚本文件.")]
        [Editor(typeof(PythonFileNameEditor), typeof(UITypeEditor))]
        public string Script { get; set; }

        private class BatFileNameEditor : FileNameEditor
        {
            protected override void InitializeDialog(OpenFileDialog openFileDialog)
            {
                base.InitializeDialog(openFileDialog);
                openFileDialog.FileName = "activate.bat";
                openFileDialog.Filter = @"批处理文件(*.bat)|*.bat";
            }
        }

        private class PythonFileNameEditor : FileNameEditor
        {
            protected override void InitializeDialog(OpenFileDialog openFileDialog)
            {
                base.InitializeDialog(openFileDialog);
                openFileDialog.InitialDirectory = Path.Combine(Application.StartupPath, "Scripts");
                openFileDialog.Filter = @"Python脚本(*.py)|*.py";
            }
        }

        protected class DynamicListConverter : StringConverter
        {
            public override bool GetStandardValuesSupported(ITypeDescriptorContext context)
            {
                // Indicate that standard values are supported
                return true;
            }

            public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context)
            {
                // This is where you dynamically generate your list of items
                // You can fetch these from a database, file, or other source
                var dynamicItems = new List<string>();

                if (context.Instance is ViewRBFMorphing rbfMorphing
                    && File.Exists(rbfMorphing.CondaActivateBat))
                {
                    var path = Path.GetDirectoryName(rbfMorphing.CondaActivateBat);
                    if (path != null)
                    {
                        var pythonName = Directory.GetParent(path);
                        if (pythonName != null)
                        {
                            var envDirs = Path.Combine(pythonName.FullName, "envs");
                            dynamicItems.AddRange(
                                from dir in Directory.GetDirectories(envDirs)
                                select new DirectoryInfo(dir) into info
                                where info.Exists
                                select info.Name
                                );
                        }
                    }
                }

                return new StandardValuesCollection(dynamicItems);
            }

            public override bool GetStandardValuesExclusive(ITypeDescriptorContext context)
            {
                // Set to true if the user can only select from the provided list, false for free text entry
                return false;
            }
        }

        public ViewRBFMorphing(PythonSettings settings)
        {
            _pythonSettings = settings;
            _dctd = ProviderInstaller.Install(this);
        }

        public ISettings GetBase()
        {
            return _pythonSettings;
        }

        public void Reset()
        {
            _pythonSettings.Reset();
        }
    }
}