using VoiceCat.Core;
using UIKit;

namespace VoiceCat.iOS;

internal sealed class ServerListController : UITableViewController
{
    private readonly AppModel model;
    internal ServerListController(AppModel model) { this.model = model; Title = "Servers"; TabBarItem = new(UITabBarSystemItem.Favorites, 0); }
    public override void ViewDidLoad()
    {
        base.ViewDidLoad(); TableView.RegisterClassForCellReuse(typeof(UITableViewCell), "server");
        NavigationItem.RightBarButtonItem = new(UIBarButtonSystemItem.Add, (_, _) => PresentEditor(null)); model.Changed += Reload;
    }
    public override nint RowsInSection(UITableView tableView, nint section) => model.Profiles.Count;
    public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
    {
        UITableViewCell cell = tableView.DequeueReusableCell("server", indexPath);
        ServerProfile p = model.Profiles[indexPath.Row];
        var content = cell.DefaultContentConfiguration; content.Text = p.DisplayName; content.SecondaryText = p.Authentication.ToString(); cell.ContentConfiguration = content;
        cell.Accessory = UITableViewCellAccessory.DisclosureIndicator; return cell;
    }
    public override async void RowSelected(UITableView tableView, NSIndexPath indexPath)
    {
        tableView.DeselectRow(indexPath, true); try { await model.ConnectAsync(model.Profiles[indexPath.Row]); } catch (Exception e) { UiHelpers.ShowError(this, e); }
    }
    public override UISwipeActionsConfiguration GetTrailingSwipeActionsConfiguration(UITableView tableView, NSIndexPath indexPath)
    {
        ServerProfile profile = model.Profiles[indexPath.Row];
        UIContextualAction edit = UIContextualAction.FromContextualActionStyle(UIContextualActionStyle.Normal, "Edit", (_, _, done) => { PresentEditor(profile); done(true); });
        UIContextualAction delete = UIContextualAction.FromContextualActionStyle(UIContextualActionStyle.Destructive, "Delete", (_, _, done) => { model.RemoveProfile(profile); done(true); });
        return UISwipeActionsConfiguration.FromActions([delete, edit]);
    }
    private void PresentEditor(ServerProfile? profile) => PresentViewController(new UINavigationController(new ServerEditorController(model, profile)), true, null);
    private void Reload() { TableView.ReloadData(); NavigationItem.Prompt = model.IsConnecting ? model.Status : null; }
}

internal sealed class ServerEditorController : UIViewController
{
    private readonly AppModel model; private readonly ServerProfile? existing;
    private readonly UITextField host = UiHelpers.Field("Hostname or IP address");
    private readonly UITextField port = UiHelpers.Field("Port");
    private readonly UISegmentedControl mode = new(["Guest", "Account"]);
    private readonly UITextField name = UiHelpers.Field("Nickname or username");
    private readonly UITextField password = UiHelpers.Field("Password (optional)", true);
    internal ServerEditorController(AppModel model, ServerProfile? existing) { this.model = model; this.existing = existing; Title = existing is null ? "Add Server" : "Edit Server"; }
    public override void ViewDidLoad()
    {
        base.ViewDidLoad(); View!.BackgroundColor = UIColor.SystemGroupedBackground; port.KeyboardType = UIKeyboardType.NumberPad;
        UIStackView stack = new([host, port, mode, name, password]) { Axis = UILayoutConstraintAxis.Vertical, Spacing = 12, TranslatesAutoresizingMaskIntoConstraints = false };
        View.AddSubview(stack); NSLayoutConstraint.ActivateConstraints([stack.TopAnchor.ConstraintEqualTo(View.SafeAreaLayoutGuide.TopAnchor, 24), stack.LeadingAnchor.ConstraintEqualTo(View.LayoutMarginsGuide.LeadingAnchor), stack.TrailingAnchor.ConstraintEqualTo(View.LayoutMarginsGuide.TrailingAnchor)]);
        mode.SelectedSegment = existing?.Authentication == ServerAuthentication.Account ? 1 : 0; host.Text = existing?.Host; port.Text = (existing?.Port ?? 8384).ToString(); name.Text = existing?.Username ?? existing?.Nickname;
        NavigationItem.LeftBarButtonItem = new(UIBarButtonSystemItem.Cancel, (_, _) => DismissViewController(true, null));
        NavigationItem.RightBarButtonItem = new(UIBarButtonSystemItem.Save, (_, _) => Save());
    }
    private void Save()
    {
        try
        {
            if (!ushort.TryParse(port.Text, out ushort number)) throw new ArgumentException("Enter a valid port.");
            ServerAuthentication auth = mode.SelectedSegment == 1 ? ServerAuthentication.Account : ServerAuthentication.Guest;
            ServerProfile p = ServerProfile.Create(host.Text ?? "", number, auth, auth == ServerAuthentication.Account ? name.Text : null, auth == ServerAuthentication.Guest ? name.Text : null, existing?.Id);
            model.UpsertProfile(p, password.Text); DismissViewController(true, null);
        }
        catch (Exception e) { UiHelpers.ShowError(this, e); }
    }
}