using Godot;
using System;
using System.Collections.Generic;

public partial class Alert : Control {
    Options _Options;
    Reference _Reference;

    Queue<string> AlertQueue = new Queue<string>();

    public override void _Ready() {
        _Options = GetNode<Options>( "/root/Options" );
        _Reference = GetNode<Reference>("/root/Reference");
        _Reference.Alert = this;
    }

    // This needs to notify the user
    public void PerformAlert(string NotificationText ) {
        if ( _Options.isServer ) {
            GD.Print( NotificationText );
        } else {
            AlertQueue.Enqueue( NotificationText );
        }
    }

    Panel working = null;
    float CurrentStep;
    float PauseCounter;
    int task = 0;
    public override void _Process( double delta ) {
        switch( task ) {

            // Create the label
            case 0: {
                if (AlertQueue.Count > 0 ) {
                    working = new Panel();
                    working.Size = new Vector2( 300, 50 );
                    AddChild( working );
                    working.Position = new Vector2( 0, -50 );

                    Label text = new Label();
                    text.Text = AlertQueue.Dequeue();
                    text.Size = new Vector2( 300, 50 );
                    text.HorizontalAlignment = HorizontalAlignment.Center;
                    text.VerticalAlignment = VerticalAlignment.Center;
                    working.AddChild( text );
                    CurrentStep = 0;
                    PauseCounter = 0;
                    task = 1;
                }
                break;
            }

            // Bring down the label
            case 1: {
                if ( CurrentStep < _Options.AlertTime / 2 ) {
                    CurrentStep += Convert.ToSingle( delta );
                    float alertTime = _Options.AlertTime / 2;
                    working.Position = new Vector2( 0, Mathf.Lerp( -50, 25, CurrentStep / alertTime ) );
                } else {
                    task = 2;
                }
                break;
            }

            // Pause the label
            case 2: {
                PauseCounter += Convert.ToSingle( delta );
                if (PauseCounter >= _Options.AlertPauseTime) {
                    task = 3;
                }
                break;
            }

            // Bring Up the label
            case 3: {
                if ( CurrentStep > 0 ) {
                    CurrentStep -= Convert.ToSingle( delta );
                    float alertTime = _Options.AlertTime / 2;
                    working.Position = new Vector2( 0, Mathf.Lerp( -50, 25, CurrentStep / alertTime ) );
                } else {
                    working.Free();
                    working = null;
                    task = 0;
                }
                break;
            }
        }

        
    }

}