#include "pch.h"
#include "Enemy.h"
#include "Game.h"
#include "Texture.h"

const float Enemy::m_ClipWidth{ 80.f };
const float Enemy::m_ClipHeight{ 80.f };

const Vector2f Enemy::m_GravityAcceleration{ 0, -981.0f * 2 };

Enemy::Enemy(int x, int y)
	: Enemy(Point2f{ x * Tile::m_Size, y * Tile::m_Size })
{

}

Enemy::Enemy(const Point2f& pos)
	: m_Hitbox{ pos.x, pos.y, 0, 0 }
	, m_SrcRect{ 0, 0, m_ClipWidth, m_ClipHeight }
	, m_Velocity{ }
	, m_Angle{ }
	, m_SpriteRect{ 0, 0, 80, 80 }
	, m_Direction{ Direction::RIGHT }
	, m_AnimFirstFrameId{ 0 }
	, m_AnimLength{ 10 }
	, m_AnimLoop{ true }
	, m_NrFramesPerSec{ 20 }
	, m_AnimTime{ }
	, m_AnimFrame{ }
	, m_Lives{ 1 }
{

}

int Enemy::GetLives() const
{
	return m_Lives;
}

Enemy::~Enemy()
{
	m_pTexture = nullptr;
}

std::vector<Point2f> Enemy::GetTopVertices() const
{
	std::vector<Point2f> topVertices{ Point2f{ m_Hitbox.left, m_Hitbox.bottom + m_Hitbox.height }, Point2f{ m_Hitbox.left + m_Hitbox.width, m_Hitbox.bottom + m_Hitbox.height } };
	return topVertices;
}

void Enemy::Draw() const
{
	if (Game::DrawDebug)
	{
		//draw hitbox
		utils::SetColor(Color4f{ 1, 0, 0, 0.5f });
		utils::FillRect(m_Hitbox);
	}

	Rectf srcRect{ (m_ClipWidth * (m_AnimFirstFrameId % 11)) + (m_ClipWidth * m_AnimFrame), m_ClipHeight + (m_ClipHeight * (m_AnimFirstFrameId / 11)), m_ClipWidth, m_ClipHeight };
	Rectf destRect{ -m_SpriteRect.width / 2, 0, m_SpriteRect.width, m_SpriteRect.height };

	glPushMatrix();
	glTranslatef(m_SpriteRect.left - destRect.left, m_SpriteRect.bottom, 0);

	if (m_Direction == Direction::LEFT)
	{
		glScalef(-1, 1, 1);
	}

	//draw enemy
	m_pTexture->Draw(destRect, srcRect);

	glPopMatrix();
}

void Enemy::CenterInTile()
{
	m_Hitbox.left += (Tile::m_Size - m_Hitbox.width) / 2;
}

Rectf& Enemy::GetHitbox()
{
	return m_Hitbox;
}