using Godot;
using Godot.Collections;
using System.Linq;
using System.Text;

namespace Gmtk24 {
    public partial class Hud : Control {
        [Export]
        public Player Player;
        [Export]
        public Label HoverText;
        [Export]
        public bool InteractionPaused = false;
        [Export]
        public Container CameraHeightContainer;
        [Export]
        public Slider CameraHeightSlider;
        [Export]
        public Label CornerPrompt;

        private Interactible Hovered;

        private Dictionary<string, string> ButtonNames = new();

        public override void _Process(double delta) {
            if (Player == null)
                return;

            GodotObject collider = null;
            if (Input.MouseMode == Input.MouseModeEnum.Captured) {
                if (Player.Eye.Current)
                    collider = Player.LookingAt.GetCollider();
            } else {
                var results = Util.RaycastFromMouse(GetViewport().GetCamera3D());
                collider = results?.Collider;
            }


            if (!InteractionPaused) {
                if (collider is Interactible interactible) {
                    if (interactible != Hovered) {
                        Hovered?.SetHovered(false);
                        interactible.SetHovered(true);
                    }

                    Hovered = interactible;

                    HoverText.Text = $"{FormButtonNames("interact")}: {interactible.InteractName}";
                } else {
                    HoverText.Text = "";
                }
            } else {
                Hovered?.SetHovered(false);
                Hovered = null;
                if (Player.Table.Orbit.HeldBlock != null) {
                    var release = FormButtonNames("release_block");
                    var place = FormButtonNames("place_block");
                    var rotate_right = FormButtonNames("rotate_block_right");
                    var rotate_left = FormButtonNames("rotate_block_left");
                    HoverText.Text = $"{place}: Place Block\n{release}: Throw Block\nRotate Block: ({rotate_right}/{rotate_left})";
                } else {
                    HoverText.Text = "";
                }
            }

            if (!Player.Table.Orbit.IsEnabled) {
                var names = FormButtonNames("toggle_table");
                if (Player.Table.IsEnabled)
                    CornerPrompt.Text = $"{names}: {"Recall Table"}";
                else
                    CornerPrompt.Text = $"{names}: {"Spawn Table"}";
            } else {
                if (Player.Table.Orbit.HeldBlock == null) {
                    var zoom_out = FormButtonNames("zoom_orbit_out");
                    var zoom_in = FormButtonNames("zoom_orbit_out");
                    var drag = FormButtonNames("drag_orbit");
                    CornerPrompt.Text = $"Zoom: {zoom_in}/{zoom_out}\nDrag: {drag}";
                } else {
                    CornerPrompt.Text = "";
                }
            }
        }

        public override void _UnhandledInput(InputEvent @event) {
            if (@event.IsAction("interact") && Hovered != null) {
                Hovered.HandleInput(@event);
                GetViewport().SetInputAsHandled();
            }
        }

        private string FormButtonNames(string actionName) {
            if (!ButtonNames.ContainsKey(actionName)) {
                ButtonNames.Add(actionName, InputMap.ActionGetEvents(actionName)
                    .Select(e => e.AsText().Replace(" (Physical)", ""))
                    .Aggregate((a, b) => $"{a}, {b}"));
            }

            return ButtonNames[actionName];
        }

        public void ResetPromptCache() {
            ButtonNames.Clear();
        }
    }
}