using UIKit;
using Voicecat.V1;
using Channel = Voicecat.V1.Channel;

namespace VoiceCat.iOS;

internal sealed class UsersController : UITableViewController
{
    private readonly AppModel model; private IReadOnlyList<User> Visible => model.CurrentChannelId == 0 ? model.Users : model.Users.Where(user => user.ChannelId == model.CurrentChannelId).ToArray();
    internal UsersController(AppModel model) { this.model = model; Title = "Users"; model.Changed += () => TableView.ReloadData(); }
    public override void ViewDidLoad() { base.ViewDidLoad(); TableView.RegisterClassForCellReuse(typeof(UITableViewCell), "user"); }
    public override nint RowsInSection(UITableView tableView, nint section) => Visible.Count;
    public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
    {
        User user = Visible[indexPath.Row]; UITableViewCell cell = tableView.DequeueReusableCell("user", indexPath); var content = cell.DefaultContentConfiguration;
        content.Text = user.Nickname + (user.Id == model.SelfUserId ? " (you)" : "");
        content.SecondaryText = user.ServerDeafened ? "server deafened" : user.ServerMuted ? "server muted" : user.SelfDeafened ? "deafened" : user.SelfMicMuted ? "muted" : user.IsGuest ? "guest" : "account";
        content.Image = UIImage.GetSystemImage(user.ServerMuted || user.SelfMicMuted ? "mic.slash.fill" : "mic.fill"); cell.ContentConfiguration = content; cell.AccessibilityLabel = $"{content.Text}, {content.SecondaryText}";
        if (user.Id != model.SelfUserId) cell.AccessibilityCustomActions = Actions(user).Select(value => new UIAccessibilityCustomAction(value.Title, (Func<UIAccessibilityCustomAction, bool>)(_ => { value.Run(); return true; }))).ToArray(); return cell;
    }
    public override void RowSelected(UITableView tableView, NSIndexPath indexPath)
    {
        User user = Visible[indexPath.Row]; tableView.DeselectRow(indexPath, true); if (user.Id == model.SelfUserId) return;
        UIAlertController menu = UIAlertController.Create(user.Nickname, null, UIAlertControllerStyle.ActionSheet);
        foreach ((string title, Action run, bool destructive) in Actions(user)) menu.AddAction(UIAlertAction.Create(title, destructive ? UIAlertActionStyle.Destructive : UIAlertActionStyle.Default, _ => run()));
        menu.AddAction(UIAlertAction.Create("Cancel", UIAlertActionStyle.Cancel, null)); menu.PopoverPresentationController!.SourceView = (UIView?)tableView.CellAt(indexPath) ?? tableView; PresentViewController(menu, true, null);
    }
    private IReadOnlyList<(string Title, Action Run, bool Destructive)> Actions(User user)
    {
        Permissions permissions = model.Client?.Permissions ?? new(); var result = new List<(string, Action, bool)>
        { ("Private message", () => PromptPrivate(user), false), ("Volume and noise reduction", () => NavigationController?.PushViewController(new PerUserTuningController(model, user), true), false) };
        if (permissions.CanKick || permissions.IsAdmin) result.Add(("Kick", () => PromptReason(user, false), true));
        if (permissions.CanBan || permissions.IsAdmin) result.Add(("Ban", () => NavigationController?.PushViewController(new BanUserController(model, user), true), true));
        if (permissions.CanMoveUsers || permissions.IsAdmin) result.Add(("Move to channel", () => NavigationController?.PushViewController(new MoveUserController(model, user), true), false));
        if (permissions.IsAdmin)
        {
            result.Add((user.ServerMuted ? "Server unmute" : "Server mute", () => Run(() => model.Client!.SetServerMuteAsync(user.Id, !user.ServerMuted, user.ServerDeafened)), false));
            result.Add((user.ServerDeafened ? "Server undeafen" : "Server deafen", () => Run(() => model.Client!.SetServerMuteAsync(user.Id, user.ServerMuted, !user.ServerDeafened)), false));
            result.Add(("Permissions", () => NavigationController?.PushViewController(new PermissionsController(model, user), true), false));
        }
        return result;
    }
    private void PromptPrivate(User user) { UIAlertController prompt = UIAlertController.Create($"Message {user.Nickname}", null, UIAlertControllerStyle.Alert); prompt.AddTextField(field => field.AccessibilityLabel = "Private message"); prompt.AddAction(UIAlertAction.Create("Cancel", UIAlertActionStyle.Cancel, null)); prompt.AddAction(UIAlertAction.Create("Send", UIAlertActionStyle.Default, _ => model.SendText(prompt.TextFields?[0].Text ?? "", user.Id))); PresentViewController(prompt, true, null); }
    private void PromptReason(User user, bool ban) { UIAlertController prompt = UIAlertController.Create(ban ? "Ban user" : "Kick user", "Reason (optional)", UIAlertControllerStyle.Alert); prompt.AddTextField(field => field.AccessibilityLabel = "Reason"); prompt.AddAction(UIAlertAction.Create("Cancel", UIAlertActionStyle.Cancel, null)); prompt.AddAction(UIAlertAction.Create(ban ? "Ban" : "Kick", UIAlertActionStyle.Destructive, _ => Run(() => model.Client!.KickUserAsync(user.Id, prompt.TextFields?[0].Text ?? "")))); PresentViewController(prompt, true, null); }
    private async void Run(Func<Task<GenericResult>> command) { try { GenericResult result = await model.RunAdminAsync(_ => command()); if (!result.Ok) throw new InvalidOperationException(result.Message); } catch (Exception exception) { UiHelpers.ShowError(this, exception); } }
}

internal abstract class FormController : UITableViewController
{
    protected FormController(string title) : base(UITableViewStyle.InsetGrouped) { Title = title; }
    protected static UITableViewCell TextCell(UITableView table, NSIndexPath path, string id, string text, string? detail = null)
    { UITableViewCell cell = table.DequeueReusableCell(id, path); var content = cell.DefaultContentConfiguration; content.Text = text; content.SecondaryText = detail; cell.ContentConfiguration = content; return cell; }
    protected static UISwitch Switch(bool value, string label, EventHandler handler) { var toggle = new UISwitch { On = value, AccessibilityLabel = label }; toggle.ValueChanged += handler; return toggle; }
}

internal sealed class PermissionsController : FormController
{
    private readonly AppModel model; private readonly User user; private readonly string[] names = ["Create temporary channels", "Kick users", "Ban users", "Move users", "Manage accounts", "Administrator"];
    private readonly bool[] values = new bool[6];
    internal PermissionsController(AppModel model, User user) : base($"Permissions — {user.Nickname}") { this.model = model; this.user = user; }
    public override void ViewDidLoad() { base.ViewDidLoad(); TableView.RegisterClassForCellReuse(typeof(UITableViewCell), "permission"); NavigationItem.RightBarButtonItem = new("Save", UIBarButtonItemStyle.Done, async (_, _) => await Save()); }
    public override nint RowsInSection(UITableView tableView, nint section) => names.Length;
    public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath) { UITableViewCell cell = TextCell(tableView, indexPath, "permission", names[indexPath.Row]); int row = indexPath.Row; cell.AccessoryView = Switch(values[row], names[row], (_, _) => values[row] = ((UISwitch)cell.AccessoryView!).On); return cell; }
    private async Task Save() { try { var permissions = new Permissions { CanCreateTempChannel = values[0], CanKick = values[1], CanBan = values[2], CanMoveUsers = values[3], CanAdminAccounts = values[4], IsAdmin = values[5] }; GenericResult result = await model.RunAdminAsync(client => client.SetPermissionsAsync(user.Id, permissions)); if (!result.Ok) throw new InvalidOperationException(result.Message); NavigationController?.PopViewController(true); } catch (Exception exception) { UiHelpers.ShowError(this, exception); } }
}

internal sealed class MoveUserController : FormController
{
    private readonly AppModel model; private readonly User user; private uint selected;
    internal MoveUserController(AppModel model, User user) : base($"Move {user.Nickname}") { this.model = model; this.user = user; selected = user.ChannelId; }
    public override void ViewDidLoad() { base.ViewDidLoad(); TableView.RegisterClassForCellReuse(typeof(UITableViewCell), "channel"); NavigationItem.RightBarButtonItem = new("Move", UIBarButtonItemStyle.Done, async (_, _) => await Move()); }
    public override nint RowsInSection(UITableView tableView, nint section) => model.Channels.Count;
    public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath) { Channel channel = model.Channels[indexPath.Row]; UITableViewCell cell = TextCell(tableView, indexPath, "channel", channel.Name); cell.Accessory = channel.Id == selected ? UITableViewCellAccessory.Checkmark : UITableViewCellAccessory.None; cell.AccessibilityLabel = channel.Name + (channel.Id == selected ? ", selected" : ""); return cell; }
    public override void RowSelected(UITableView tableView, NSIndexPath indexPath) { selected = model.Channels[indexPath.Row].Id; tableView.ReloadData(); }
    private async Task Move() { try { GenericResult result = await model.RunAdminAsync(client => client.MoveUserAsync(user.Id, selected)); if (!result.Ok) throw new InvalidOperationException(result.Message); NavigationController?.PopViewController(true); } catch (Exception exception) { UiHelpers.ShowError(this, exception); } }
}

internal sealed class BanUserController : UIViewController
{
    private readonly AppModel model; private readonly User user; private readonly UITextField reason = UiHelpers.Field("Reason (optional)"); private readonly UISegmentedControl duration = new(["Permanent", "1 hour", "1 day", "1 week"]);
    internal BanUserController(AppModel model, User user) { this.model = model; this.user = user; Title = $"Ban {user.Nickname}"; }
    public override void ViewDidLoad() { base.ViewDidLoad(); View!.BackgroundColor = UIColor.SystemGroupedBackground; duration.SelectedSegment = 0; duration.AccessibilityLabel = "Ban duration"; UIStackView stack = new([reason, duration]) { Axis = UILayoutConstraintAxis.Vertical, Spacing = 16, 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)]); NavigationItem.RightBarButtonItem = new("Ban", UIBarButtonItemStyle.Done, async (_, _) => await Ban()); }
    private async Task Ban() { try { ulong expires = duration.SelectedSegment switch { 1 => (ulong)DateTimeOffset.UtcNow.AddHours(1).ToUnixTimeMilliseconds(), 2 => (ulong)DateTimeOffset.UtcNow.AddDays(1).ToUnixTimeMilliseconds(), 3 => (ulong)DateTimeOffset.UtcNow.AddDays(7).ToUnixTimeMilliseconds(), _ => 0 }; GenericResult result = await model.RunAdminAsync(client => client.BanUserAsync(user.Id, reason.Text ?? "", expires)); if (!result.Ok) throw new InvalidOperationException(result.Message); NavigationController?.PopViewController(true); } catch (Exception exception) { UiHelpers.ShowError(this, exception); } }
}

internal sealed class PerUserTuningController : FormController
{
    private readonly AppModel model; private readonly User user; private readonly UISlider gain = new() { MinValue = 0, MaxValue = 4, Value = 1 };
    private bool muted, noise;
    internal PerUserTuningController(AppModel model, User user) : base(user.Nickname) { this.model = model; this.user = user; }
    public override void ViewDidLoad() { base.ViewDidLoad(); TableView.RegisterClassForCellReuse(typeof(UITableViewCell), "tuning"); gain.AccessibilityLabel = $"Volume gain for {user.Nickname}"; gain.ValueChanged += (_, _) => Apply(); if (user.Streams.FirstOrDefault() is { } stream && model.Client?.Audio.GetRemotePlayback(user.Id, stream.StreamId) is { } state) { gain.Value = state.Gain; muted = state.Muted; noise = state.NoiseReduction; } }
    public override nint RowsInSection(UITableView tableView, nint section) => 3;
    public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath) { string title = indexPath.Row switch { 0 => "Gain", 1 => "Mute", _ => "Noise reduction" }; UITableViewCell cell = TextCell(tableView, indexPath, "tuning", title); if (indexPath.Row == 0) cell.AccessoryView = gain; else { int row = indexPath.Row; cell.AccessoryView = Switch(row == 1 ? muted : noise, title, (_, _) => { bool value = ((UISwitch)cell.AccessoryView!).On; if (row == 1) muted = value; else noise = value; Apply(); }); } return cell; }
    private void Apply() { if (model.Client is not { } client) return; foreach (StreamInfo stream in user.Streams) client.Audio.SetRemotePlayback(user.Id, stream.StreamId, gain.Value, muted, noise); }
}