using LibraryPlugin;
using LibraryPlugin.Helpers;
using LibraryUtils.FileChooser;
using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using static LibraryUtils.FileChooser.FileChooser;

namespace LibraryPluginWinFormsApp
{
    public partial class FormMain : Form
    {
        private readonly Dictionary<string, IPluginsConvention> _plugins;
        private string _selectedPlugin;
        public FormMain()
        {
            InitializeComponent();
            _plugins = LoadPlugins();
            _selectedPlugin = string.Empty;
        }
		#region load_plugins
		private Dictionary<string, IPluginsConvention> LoadPlugins()
        {
            Dictionary<string, IPluginsConvention> plugins = new();
            string currentDirectory = Directory
                .GetParent(Environment.CurrentDirectory)!
                .Parent!
                .Parent!
                .FullName + "\\bin\\Debug\\net6.0-windows";
            string[] dllFiles = Directory.GetFiles(currentDirectory, "*.dll", SearchOption.AllDirectories);
            foreach (string dllFile in dllFiles)
            {
                try
                {
                    Assembly assembly = Assembly.LoadFrom(dllFile);

                    Type[] types = assembly.GetTypes();

                    foreach (Type type in types)
                    {
                        if (typeof(IPluginsConvention).IsAssignableFrom(type) && !type.IsInterface)
                        {
                            var plugin = (IPluginsConvention)Activator.CreateInstance(type)!;

                            plugins.Add(plugin.PluginName, plugin);
                        }
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine($"Не удалось загрузить плагин {dllFile}: {ex.Message}");
                }
            }
            foreach (var plugin in plugins)
            {
                CreateMenuItem(plugin.Value.PluginName);
            }
            return plugins;
        }
        private void CreateMenuItem(string pluginName)
        {
            ToolStripMenuItem menuItem = new ToolStripMenuItem(pluginName);
            menuItem.Click += (object? sender, EventArgs a) =>
            {
                _selectedPlugin = pluginName;
                IPluginsConvention plugin = _plugins[pluginName];
                UserControl userControl = plugin.GetControl;
                if (userControl != null)
                {
                    panelControl.Controls.Clear();
                    plugin.ReloadData();
                    userControl.Dock = DockStyle.Fill;
                    panelControl.Controls.Add(userControl);
                }
            };
            ControlsStripMenuItem.DropDownItems.Add(menuItem);
        }
		#endregion
		#region crud_ops
		private void ShowThesaurus()
        {
            _plugins[_selectedPlugin].GetThesaurus()?.Show();
        }
		private void AddNewElement()
        {
            var form = _plugins[_selectedPlugin].GetForm(null);
            if (form != null && form.ShowDialog() == DialogResult.OK)
            {
                _plugins[_selectedPlugin].ReloadData();
            }
        }
        private void UpdateElement()
        {
            var element = _plugins[_selectedPlugin].GetElement;
            if (element == null)
            {
                MessageBox.Show("Нет выбранного элемента", "Ошибка",
                    MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            var form = _plugins[_selectedPlugin].GetForm(element);
            if (form != null && form.ShowDialog() == DialogResult.OK)
            {
                _plugins[_selectedPlugin].ReloadData();
            }
        }
        private void DeleteElement()
        {
            if (MessageBox.Show("Удалить выбранный элемент", "Удаление",
                MessageBoxButtons.YesNo,
                MessageBoxIcon.Question) != DialogResult.Yes)
            {
                return;
            }
            var element = _plugins[_selectedPlugin].GetElement;
            if (element == null)
            {
                MessageBox.Show("Нет выбранного элемента", "Ошибка",
                MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }

            if (_plugins[_selectedPlugin].DeleteElement(element))
            {
                _plugins[_selectedPlugin].ReloadData();
            }
        }
		#endregion
		#region docs_ops
		private void CreateSimpleDoc()
		{
			string fileName = GetFileFullName(DocType.Pdf);
            if (_plugins[_selectedPlugin].CreateSimpleDocument(
                new PluginsConventionSaveDocument() { FileName = fileName, }))
            {
                MessageBox.Show("Документ сохранен", "Создание документа", 
                    MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            else
            {
                MessageBox.Show("Ошибка при создании документа",
                    "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        private void CreateTableDoc()
		{
			string fileName = GetFileFullName(DocType.Excel);
			if (_plugins[_selectedPlugin].CreateTableDocument(
                new PluginsConventionSaveDocument() { FileName = fileName, }))
			{
				MessageBox.Show("Документ сохранен", "Создание документа", 
                    MessageBoxButtons.OK, MessageBoxIcon.Information);
			}
			else
			{
				MessageBox.Show("Ошибка при создании документа",
				    "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
			}
		}
        private void CreateChartDoc()
		{
			string fileName = GetFileFullName(DocType.Word);
			if (_plugins[_selectedPlugin].CreateChartDocument(
                new PluginsConventionSaveDocument() { FileName = fileName, }))
			{
				MessageBox.Show("Документ сохранен", "Создание документа", 
                    MessageBoxButtons.OK, MessageBoxIcon.Information);
			}
			else
			{
				MessageBox.Show("Ошибка при создании документа",
				    "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
			}
		}
		#endregion
		#region event-handlers
		private void FormMain_KeyDown(object sender, KeyEventArgs e)
		{
			if (string.IsNullOrEmpty(_selectedPlugin) ||
				!_plugins.ContainsKey(_selectedPlugin))
			{
				return;
			}
			if (!e.Control)
			{
				return;
			}
			switch (e.KeyCode)
			{
				case Keys.I:
					ShowThesaurus();
					break;
				case Keys.A:
					AddNewElement();
					break;
				case Keys.U:
					UpdateElement();
					break;
				case Keys.D:
					DeleteElement();
					break;
				case Keys.S:
					CreateSimpleDoc();
					break;
				case Keys.T:
					CreateTableDoc();
					break;
				case Keys.C:
					CreateChartDoc();
					break;
			}
		}
		private void ThesaurusToolStripMenuItem_Click(object sender,
            EventArgs e) => ShowThesaurus();
        private void AddElementToolStripMenuItem_Click(object sender,
            EventArgs e) => AddNewElement();
        private void UpdElementToolStripMenuItem_Click(object sender,
            EventArgs e) => UpdateElement();
        private void DelElementToolStripMenuItem_Click(object sender,
            EventArgs e) => DeleteElement();
        private void SimpleDocToolStripMenuItem_Click(object sender,
            EventArgs e) => CreateSimpleDoc();
        private void TableDocToolStripMenuItem_Click(object sender, EventArgs
            e) => CreateTableDoc();
        private void ChartDocToolStripMenuItem_Click(object sender, EventArgs
            e) => CreateChartDoc();
		#endregion
	}
}