#include "game.h"
#include <iostream>

SpriteRenderer* Renderer;


Game::~Game()
{
    delete Renderer;
}

Game::Game(unsigned int width, unsigned int height)
    : State(GAME_ACTIVE), Keys(), Width(width), Height(height)
{

}

// Initial size of the player paddle
const glm::vec2 PLAYER_SIZE (100.0f, 20.0f);
// Initial velocity of the player paddle
const float PLAYER_VELOCITY(500.0f);
GameObject* player;



void Game::Init()
{
    // Load shaders
    ResourceManager::LoadShader("shader.vs", "shader.fs", nullptr, "sprite");
    // configure shaders
    glm::mat4 projection = glm::ortho(0.0f, static_cast<float>(this->Width), static_cast<float>(this->Height), 0.0f, -1.0f, 1.0f);
    ResourceManager::GetShader("sprite").Use().SetInteger("image", 0);
    ResourceManager::GetShader("sprite").SetMatrix4("projection", projection);
    // set render-specific controls
    Renderer = new SpriteRenderer(ResourceManager::GetShader("sprite"));
    // load textures
    ResourceManager::LoadTexture("textures/awesomeface.png", true, "face");
    ResourceManager::LoadTexture("textures/background.jpg", false, "background");
    ResourceManager::LoadTexture("textures/block.png", false, "block");
    ResourceManager::LoadTexture("textures/block_solid.png", false, "block_solid");
    ResourceManager::LoadTexture("textures/paddle.png", true, "paddle");
    // Load levels
    GameLevel one; one.Load("levels/one.lvl", this->Width, this->Height / 2);
    GameLevel two; two.Load("levels/two.lvl", this->Width, this->Height / 2);
    GameLevel three; three.Load("levels/three.lvl", this->Width, this->Height / 2);
    GameLevel four; four.Load("levels/four.lvl", this->Width, this->Height / 2);
    this->Levels.push_back(one);
    this->Levels.push_back(two);
    this->Levels.push_back(three);
    this->Levels.push_back(four);
    this->Level = 0;

    glm::vec2 playerPos = glm::vec2(this->Width /2 - PLAYER_SIZE.x /2.0f, 
                                    this->Height  - PLAYER_SIZE.y);
    player = new GameObject(playerPos, PLAYER_SIZE, ResourceManager::GetTexture("paddle"));

}


void Game::ProcessInput(float dt)
{
    if(this->State == GAME_ACTIVE)
    {
        float velocity = PLAYER_VELOCITY * dt;
        if( this->Keys[GLFW_KEY_A])
        {
            if(player->Position.x >= 0.0f)
                player->Position.x -= velocity;
        }
        if( this->Keys[GLFW_KEY_D])
        {
            if(player->Position.x <= this->Width - player->Size.x)
                player->Position.x += velocity;
        }
    }
}


void Game::Update(float dt)
{

}

void Game::Render()
{
    if(this->State == GAME_ACTIVE)
    {
        // draw background
        Renderer->DrawSprite(ResourceManager::GetTexture("background"),
         glm::vec2(0.0f, 0.0f), glm::vec2(this->Width, this->Height), 0.0f);

         // draw level
         this->Levels[this->Level].Draw(*Renderer);

         player->Draw(*Renderer);
    }
}