using ModVersionChecker.managers.interfaces;
using ModVersionChecker.service.interfaces;

namespace ModVersionChecker.ui.forms
{
    public class AppDetailsForm : Form
    {
        private TextBox _searchBox;
        private ListBox _resultsList;
        private Button _addButton;
        private readonly IApiService _apiService;
        private readonly IAppService _appService;
        public App? SelectedApp { get; private set; }

        public event EventHandler<string> OnAppAdded;

        public AppDetailsForm(
            IApiService apiService, 
            IAppService appService
        )
        {
            _apiService = apiService ?? throw new ArgumentNullException(nameof(apiService));
            _appService = appService ?? throw new ArgumentNullException(nameof(appService));
            InitializeComponent();
        }

        private void InitializeComponent()
        {
            Text = "Search and Add App";
            Width = 400;
            Height = 500;
            Padding = new Padding(20);
            StartPosition = FormStartPosition.CenterParent;

            _searchBox = new TextBox { Dock = DockStyle.Top, PlaceholderText = "Search..." };
            _resultsList = new ListBox { Dock = DockStyle.Fill };
            _addButton = new Button { Text = "Add Selected", Dock = DockStyle.Bottom, Enabled = false };

            _searchBox.TextChanged += async (s, e) => await UpdateResultsAync();
            _resultsList.SelectedIndexChanged += (s, e) => _addButton.Enabled = _resultsList.SelectedItem != null;
            _resultsList.DoubleClick += (s, e) => AddSelected();
            _addButton.Click += (s, e) => AddSelected();

            Controls.Add(_resultsList);
            Controls.Add(_addButton);
            Controls.Add(_searchBox);
        }

        private async Task UpdateResultsAync()
        {
            var query = _searchBox.Text.Trim().ToLower();
            if (query.Length < 3)
            {
                return;
            }
            if (string.IsNullOrEmpty(query))
            {
                _resultsList.DataSource = null;
                return;
            }
            var apiResults = await _apiService.SearchApps(query);
            _resultsList.DataSource = _appService.PurgeExisitingApps(apiResults);
            _resultsList.DisplayMember = "Name";
        }

        private void AddSelected()
        {
            if (_resultsList.SelectedItem is App app)
            {
                SelectedApp = app;
                _appService.CreateApp(app);
                DialogResult = DialogResult.OK;
                OnAppAdded?.Invoke(this, "App saved");
                Close();
            }
        }
    }
}