using ModVersionChecker.data.model;
using ModVersionChecker.managers.interfaces;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;

namespace ModVersionChecker.forms
{
    public class SourcesConfigForm : Form
    {
        private List<SourceDef> _sourceDefs;
        private ListView _listView;
        private Button _addButton, _editButton, _deleteButton, _closeButton;
        private TableLayoutPanel _mainLayout;
        private readonly ISourcesDefManager _sourcesManager;
        private readonly IFormFactory _formFactory;
        public event EventHandler<string>? OnSourcesChanged;
        public List<SourceDef> SourceDefs => _sourceDefs;

        public SourcesConfigForm(IFormFactory formFactory, ISourcesDefManager sourcesManager)
        {
            _sourcesManager = sourcesManager ?? throw new ArgumentNullException(nameof(sourcesManager));
            _formFactory = formFactory ?? throw new ArgumentNullException(nameof(formFactory));
            _sourceDefs = _sourcesManager.List() ?? new List<SourceDef>();
            Padding = new Padding(20);
            InitializeComponent();
        }

        private void InitializeComponent()
        {
            Text = "Source Definitions";
            Size = new Size(800, 400);
            StartPosition = FormStartPosition.CenterParent;

            _mainLayout = new TableLayoutPanel
            {
                Dock = DockStyle.Fill,
                RowCount = 2,
                ColumnCount = 1,
                Padding = new Padding(10)
            };
            _mainLayout.RowStyles.Add(new RowStyle(SizeType.Percent, 80));
            _mainLayout.RowStyles.Add(new RowStyle(SizeType.Percent, 20));

            _listView = new ListView
            {
                Dock = DockStyle.Fill,
                View = View.Details,
                FullRowSelect = true,
                MultiSelect = false,
                GridLines = true
            };
            _listView.Columns.Add("Id", 100);
            _listView.Columns.Add("Name", 150);
            _listView.Columns.Add("Type", 100);
            _listView.Columns.Add("Defaults", -2);

            UpdateListView();

            _mainLayout.Controls.Add(_listView, 0, 0);

            var buttonPanel = new FlowLayoutPanel { Dock = DockStyle.Fill, FlowDirection = FlowDirection.LeftToRight };
            _addButton = new Button { Text = "Add" };
            _editButton = new Button { Text = "Edit", Enabled = false };
            _deleteButton = new Button { Text = "Delete", Enabled = false };
            _closeButton = new Button { Text = "Close", DialogResult = DialogResult.OK };

            _addButton.Click += (s, e) => AddSourceDef();
            _editButton.Click += (s, e) => EditSourceDef();
            _deleteButton.Click += (s, e) => DeleteSourceDef();
            _closeButton.Click += (s, e) => Close();

            _listView.SelectedIndexChanged += (s, e) =>
            {
                bool hasSelection = _listView.SelectedItems.Count > 0;
                _editButton.Enabled = hasSelection;
                _deleteButton.Enabled = hasSelection;
            };

            buttonPanel.Controls.AddRange(new Control[] { _addButton, _editButton, _deleteButton, _closeButton });
            _mainLayout.Controls.Add(buttonPanel, 0, 1);

            Controls.Add(_mainLayout);
        }

        private void UpdateListView()
        {
            _listView.Items.Clear();
            foreach (var src in _sourceDefs)
            {
                var item = new ListViewItem(src.Id);
                item.SubItems.Add(src.Name);
                item.SubItems.Add(src.Type);
                item.SubItems.Add(string.Join(", ", src.Defaults.Select(d => $"{d.Key}={d.Value}")));
                item.Tag = src;
                _listView.Items.Add(item);
            }
        }

        private void AddSourceDef()
        {
            EventHandler<string>? handler = (s, e) => MessageBox.Show("Source Changed");
            var editor = _formFactory.CreateSourceDetailForm(null, handler);
            if (editor.ShowDialog() == DialogResult.OK)
            {
                _sourceDefs.Add(editor.SourceDef);
                UpdateListView();
            }
        }

        private void EditSourceDef()
        {
            if (_listView.SelectedItems.Count == 0) return;
            var src = _listView.SelectedItems[0].Tag as SourceDef;
            EventHandler<string>? handler = (s, e) => MessageBox.Show("Source Changed");
            var editor = _formFactory.CreateSourceDetailForm(src, handler);
            
            if (editor.ShowDialog() == DialogResult.OK)
            {
                //int idx = _sourceDefs.IndexOf(src);
                //_sourceDefs[idx] = editor.SourceDef;
                //UpdateListView();
            }
        }

        private void DeleteSourceDef()
        {
            if (_listView.SelectedItems.Count == 0) return;
            var src = _listView.SelectedItems[0].Tag as SourceDef;
            _sourceDefs.Remove(src);
            UpdateListView();
        }
    }
}