using Godot;
using System;
using Chessistics.Engine.Model;

namespace Chessistics.Scripts.UI;

public partial class ControlBar : HBoxContainer
{
    [Signal]
    public delegate void PlayPressedEventHandler();
    [Signal]
    public delegate void PausePressedEventHandler();
    [Signal]
    public delegate void StepPressedEventHandler();
    [Signal]
    public delegate void StopPressedEventHandler();
    [Signal]
    public delegate void SpeedChangedEventHandler(float speed);

    private Button _playButton = null!;
    private Button _pauseButton = null!;
    private Button _stepButton = null!;
    private Button _stopButton = null!;
    private OptionButton _speedSelect = null!;
    private Label _turnLabel = null!;

    public override void _Ready()
    {
        _playButton = new Button { Text = "▶ PLAY" };
        _playButton.Pressed += () => EmitSignal(SignalName.PlayPressed);
        AddChild(_playButton);

        _pauseButton = new Button { Text = "⏸ PAUSE" };
        _pauseButton.Pressed += () => EmitSignal(SignalName.PausePressed);
        AddChild(_pauseButton);

        _stepButton = new Button { Text = "⏭ STEP" };
        _stepButton.Pressed += () => EmitSignal(SignalName.StepPressed);
        AddChild(_stepButton);

        _stopButton = new Button { Text = "⏹ STOP" };
        _stopButton.Pressed += () => EmitSignal(SignalName.StopPressed);
        AddChild(_stopButton);

        _speedSelect = new OptionButton();
        _speedSelect.AddItem("x1", 0);
        _speedSelect.AddItem("x2", 1);
        _speedSelect.AddItem("x4", 2);
        _speedSelect.ItemSelected += OnSpeedSelected;
        AddChild(_speedSelect);

        _turnLabel = new Label { Text = "Coup: --" };
        _turnLabel.AddThemeFontSizeOverride("font_size", 14);
        AddChild(_turnLabel);

        UpdateForPhase(SimPhase.Edit);
    }

    private void OnSpeedSelected(long index)
    {
        float speed = index switch
        {
            0 => 1.0f,
            1 => 0.5f,
            2 => 0.25f,
            _ => 1.0f
        };
        EmitSignal(SignalName.SpeedChanged, speed);
    }

    public void UpdateForPhase(SimPhase phase)
    {
        _playButton.Disabled = phase != SimPhase.Edit && phase != SimPhase.Paused;
        _pauseButton.Disabled = phase != SimPhase.Running;
        _stepButton.Disabled = phase == SimPhase.Running || phase == SimPhase.Victory || phase == SimPhase.Defeat;
        _stopButton.Disabled = phase == SimPhase.Edit;
    }

    public void UpdateTurn(int turn)
    {
        _turnLabel.Text = $"Coup: {turn}";
    }

    public void ResetTurn()
    {
        _turnLabel.Text = "Coup: --";
    }
}