package gameEngine.entites.editorComponents;

import gameEngine.entites.EditorEntity;
import gameEngine.geometry.Transform;
import gameEngine.input.Input;
import gameEngine.input.MouseInput;
import gameEngine.scenes.EditorScene;
import gameEngine.views.Sprite;
import gameEngine.views.Text;
import gameEngine.views.Window;
import org.joml.Vector3f;

import java.util.ArrayList;
import java.util.List;

public abstract class DraggableComponent extends EditorComponent {

    protected EditorEntity parent;
    protected Sprite sprite;
    protected Text text;
    protected boolean isDraggable = true;
    protected boolean isLeftDragging = false;
    protected boolean isRightDragging = false;
    protected float dragOffsetX = 0.0f;
    protected float dragOffsetY = 0.0f;

    @Override
    public void init() {
        sprite.update();
        sprite.updateSpriteDimensions();
    }

    @Override
    public void update(){
        if (!(Window.get().getScene() instanceof EditorScene)) return;

        Transform transform = parent.transform;
        Transform screenTransform = parent.screenTransform;

        Vector3f cameraPosition = Window.get().getScene().getCamera().getPosition();
        Vector3f actualPosition = new Vector3f(screenTransform.position).sub(cameraPosition);

        updateSprite(actualPosition, transform);
        updateText(actualPosition, transform);

        //以下サブクラス固有処理
        updatePortView(actualPosition, transform);
        additionalUpdate(actualPosition, transform, cameraPosition);
    }

    private void updateSprite(Vector3f actualPosition, Transform transform){
        sprite.setPosition(actualPosition);
        sprite.setRotation(transform.rotation);
        sprite.setScale(transform.scale);
        sprite.update();
    }

    private void updateText(Vector3f actualPosition, Transform transform){
        text.setPosition(new Vector3f(0,-16,0).add(actualPosition));
        text.setRotation(transform.rotation);
        text.setScale(transform.scale);
        text.update();
    }

    public void setDraggable(boolean draggable) {
        this.isDraggable = draggable;
    }

    public void handleDragging() {
        if (!isDraggable) return;

        float mouseX = MouseInput.getX();
        float mouseY = MouseInput.getY();
        EditorScene scene = (EditorScene) Window.get().getScene();

        if (scene.getSelectedEntity() == null) {
            if (Input.GetMouseButtonDown(0) && isMouseOver(mouseX, mouseY)) {
                isLeftDragging = true;
                scene.setSelectedEntity(parent);
                scene.setClickedEntity(parent);
                startDragAction(mouseX, mouseY);
            }

            if (Input.GetMouseButtonDown(1) && isMouseOver(mouseX, mouseY)) {
                isRightDragging = true;
                scene.setSelectedEntity(parent);
                scene.setClickedEntity(parent);
                startDragAction(mouseX, mouseY);
            }
        }

        if (isLeftDragging && Input.GetMouseButton(0)) {
            draggingAction(mouseX, mouseY, false);
        }
        if (isRightDragging && Input.GetMouseButton(1)) {
            draggingAction(mouseX, mouseY, true);
        }

        if (Input.GetMouseButtonUp(0)) {
            isLeftDragging = false;
            scene.clearSelectedObject();
        }
        if (Input.GetMouseButtonUp(1)) {
            isRightDragging = false;
            scene.clearSelectedObject();
        }

    }

    protected boolean isMouseOver(float mouseX, float mouseY) {
        return sprite.isMouseOver(mouseX, mouseY);
    }

    protected void startDragAction(float mouseX, float mouseY) {
        Vector3f cameraPosition = Window.get().getScene().getCamera().getPosition();

        float worldMouseX = mouseX + cameraPosition.x;
        float worldMouseY = mouseY + cameraPosition.y;

        dragOffsetX = worldMouseX - parent.transform.position.x;
        dragOffsetY = worldMouseY - parent.transform.position.y;
    }

    protected void draggingAction(float mouseX, float mouseY, boolean isRightDrag) {
        Vector3f cameraPosition = Window.get().getScene().getCamera().getPosition();

        float worldMouseX = mouseX + cameraPosition.x;
        float worldMouseY = mouseY + cameraPosition.y;

        float targetX = worldMouseX - dragOffsetX;
        float targetY = worldMouseY - dragOffsetY;

        float deltaX = targetX - parent.transform.position.x;
        float deltaY = targetY - parent.transform.position.y;

        parent.transform.setPosition(targetX, targetY, parent.transform.position.z);
        parent.screenTransform.setPosition(
                parent.transform.position.x - cameraPosition.x,
                parent.transform.position.y - cameraPosition.y,
                parent.transform.position.z - cameraPosition.z
        );

        if (isRightDrag) {
            handleConnectedComponents(deltaX, deltaY, cameraPosition);
        }
    }


    private void handleConnectedComponents(float deltaX, float deltaY, Vector3f cameraPosition) {
        for (ComponentView component : getConnectedComponentViews()) {
            EditorEntity componentParent = component.parent;
            componentParent.transform.setPosition(
                    componentParent.transform.position.x + deltaX,
                    componentParent.transform.position.y + deltaY,
                    componentParent.transform.position.z
            );

            componentParent.screenTransform.setPosition(
                    componentParent.transform.position.x - cameraPosition.x,
                    componentParent.transform.position.y - cameraPosition.y,
                    componentParent.transform.position.z - cameraPosition.z
            );
        }
    }

    protected abstract void updatePortView(Vector3f actualPosition, Transform transform);
    protected abstract void additionalUpdate(Vector3f actualPosition, Transform transform, Vector3f cameraPosition);
    protected List<ComponentView> getConnectedComponentViews() {
        return new ArrayList<>();
    }
}