using PluginsConventionLibrary;
using System.Reflection;

namespace PluginsApp
{
    public partial class FormMain : Form
    {
        private readonly Dictionary<string, IPluginsConvention> _plugins;

        private string _selectedPlugin;

        public FormMain()
        {
            InitializeComponent();
            _plugins = LoadPlugins();
            _selectedPlugin = string.Empty;
        }

        private Dictionary<string, IPluginsConvention> LoadPlugins()
        {
            var plugins = new Dictionary<string, IPluginsConvention>();
            string pluginsDir = Path.Combine(Directory.GetParent(Directory.GetCurrentDirectory())!.Parent!.Parent!.FullName, "Plugins");
            if (!Directory.Exists(pluginsDir))
            {
                MessageBox.Show($"Каталог {pluginsDir} не найден.", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return plugins;
            }
            foreach (string dllFile in Directory.EnumerateFiles(pluginsDir, "*.dll", SearchOption.AllDirectories))
            {
                try
                {
                    Assembly assembly = Assembly.LoadFrom(dllFile);
                    Type[] types = assembly.GetTypes();
                    foreach (var type in types)
                    {
                        if (typeof(IPluginsConvention).IsAssignableFrom(type) && !type.IsInterface && !type.IsAbstract)
                        {
                            var plugin = (IPluginsConvention)Activator.CreateInstance(type)!;
                            plugins.Add(plugin.PluginName, plugin);
                            CreateToolStripMenuItem(plugin.PluginName);
                        }
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show($"Ошибка при загрузке сборки {dllFile}: {ex.Message}", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }        
            return plugins;
        }

		private void CreateToolStripMenuItem(string pluginName)
        {
            var menuItem = new ToolStripMenuItem(pluginName);
            menuItem.Click += (object? sender, EventArgs e) =>
            {
                _selectedPlugin = pluginName;
                IPluginsConvention plugin = _plugins![pluginName];
                UserControl userControl = plugin?.GetControl ?? throw new Exception("Проблема с загрузкой элемента для вывода данных");
                panelControl.Controls.Clear();
                plugin.ReloadData();
                userControl.Dock = DockStyle.Fill;
                panelControl.Controls.Add(userControl);
            };
            ControlsStripMenuItem.DropDownItems.Add(menuItem);
        }

        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 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();
            }
        }

        private void CreateSimpleDoc()
        {
            using var dialog = new SaveFileDialog
            {
                Filter = "docx|*.docx"
            };
            if (dialog.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    if (_plugins[_selectedPlugin].CreateSimpleDocument(new PluginsConventionSaveDocument() { FileName = dialog.FileName } ))
                    {
                        MessageBox.Show("Документ сохранен", "Создание документа", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                    else
                    {
                        MessageBox.Show("Ошибка при создании документа", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Произошла ошибка: " + ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }       
        }

        private void CreateTableDoc()
        {
            using var dialog = new SaveFileDialog
            {
                Filter = "PDF Files|*.pdf"
            };
            if (dialog.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    if (_plugins[_selectedPlugin].CreateTableDocument(new PluginsConventionSaveDocument() { FileName = dialog.FileName }))
                    {
                        MessageBox.Show("Документ сохранен", "Создание документа", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                    else
                    {
                        MessageBox.Show("Ошибка при создании документа", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Произошла ошибка: " + ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }      
        }

        private void CreateChartDoc()
        {
            using var dialog = new SaveFileDialog
            {
                Filter = "Excel Files|*.xlsx"
            };
            if (dialog.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    if (_plugins[_selectedPlugin].CreateChartDocument(new PluginsConventionSaveDocument() { FileName = dialog.FileName }))
                    {
                        MessageBox.Show("Документ сохранен", "Создание документа", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                    else
                    {
                        MessageBox.Show("Ошибка при создании документа", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Произошла ошибка: " + ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }      
        }

        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();
    }
}