#include "scenes.h"
#include <raylib.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>

Scene **sceneStack = NULL;
size_t sceneStackDepth = 0;

Scene *getCurrentScene() {
    if (sceneStackDepth == 0) return NULL;
    return sceneStack[sceneStackDepth - 1];
}

Scene *getPreviousScene() {
    if (sceneStackDepth <= 1) return NULL;
    return sceneStack[sceneStackDepth - 2];
}

bool InitSceneStack() {
    sceneStack = malloc(sizeof(Scene) * SCENE_STACK_SIZE);
    return sceneStack != NULL;
}

bool AddScene(Scene *newScene) {
    if (newScene == NULL || sceneStackDepth == SCENE_STACK_SIZE)
        return false;

    sceneStack[sceneStackDepth] = newScene;
    sceneStackDepth += 1;

    return true;
}

void DeleteSceneFromStack() {
    Scene *currentScene = getCurrentScene();
    if (currentScene == NULL) return;
    PopUpState currentSceneState = POPUP_ACTIVE;
    if (currentScene->GetCurrentState != NULL)
        currentSceneState = currentScene->GetCurrentState(currentScene);
    currentScene->Deint(currentScene);
    sceneStack[--sceneStackDepth] = NULL;

    Scene *prevoiusScene = getCurrentScene();
    if (prevoiusScene == NULL || prevoiusScene->Reopen == NULL) return;
    prevoiusScene->Reopen(prevoiusScene, currentSceneState);
}

bool DrawScene() {
    Scene *currentScene = getCurrentScene();
    if (currentScene == NULL) return false;
    if (currentScene->IsTransparent) {
        Scene *prevScene = getPreviousScene();
        if (prevScene != NULL) prevScene->Draw(prevScene);
    }
    return currentScene->Draw(currentScene);
}

bool UpdateScene() {
    Scene *currentScene = getCurrentScene();
    if (currentScene == NULL) return false;
    return currentScene->Update(currentScene);
}