#include "player.h"
#include "world.h"

Player::Player(const Vector3f& position, float rotX, float rotY) : m_position(position), m_rotX(rotX), m_rotY(rotY) {
	m_velocity = Vector3f(0, 0, 0);
	m_airborne = true;
}

void Player::TurnLeftRight(float value) {
	m_rotY += value;
	if (m_rotY > 360) m_rotY = 0;
	else if (m_rotY < -360) m_rotY = 0;
}

void Player::TurnTopBottom(float value) {
	m_rotX += value;
	if (m_rotX > 80) m_rotX = 80;
	else if (m_rotX < -80) m_rotX = -80;
}


Vector3f Player::GetInput(bool front, bool back, bool left, bool right, bool jump, bool dash, float elapsedTime) {

	Vector3f delta = Vector3f(0, 0, 0);

	float yrotrad = (m_rotY / 57.2957795056f); // 180/Pi = 57.295...
	float xrotrad = (m_rotX / 57.2957795056f);

	m_direction = Vector3f(cos(xrotrad) * sin(yrotrad),
						   -sin(xrotrad),
						   cos(xrotrad) * -cos(yrotrad));

	m_direction.Normalize();

	if (front) {
		delta.x += float(sin(yrotrad)) * elapsedTime * 10.f;
		delta.z += float(-cos(yrotrad)) * elapsedTime * 10.f;
	}
	else if (back) {
		delta.x += float(-sin(yrotrad)) * elapsedTime * 10.f;
		delta.z += float(cos(yrotrad)) * elapsedTime * 10.f;
	}

	if (left) {
		delta.x += float(-cos(yrotrad)) * elapsedTime * 10.f;
		delta.z += float(-sin(yrotrad)) * elapsedTime * 10.f;
	}
	else if (right) {
		delta.x += float(cos(yrotrad)) * elapsedTime * 10.f;
		delta.z += float(sin(yrotrad)) * elapsedTime * 10.f;
	}

	delta.Normalize();
	delta.x *= .6f;
	delta.z *= .6f;

	if (jump && !m_airborne) {
		delta.y += .32f;
		m_airborne = true;
	}

	return delta;
}

void Player::ApplyPhysics(Vector3f input, World world, float elapsedTime) {

	/* Gestion de collisions */
	BlockType bt1, bt2, bt3;

	bt1 = world.BlockAt(GetPosition().x, GetPosition().y + input.y, GetPosition().z);
	bt2 = world.BlockAt(GetPosition().x, GetPosition().y + input.y - 0.9f, GetPosition().z);
	bt3 = world.BlockAt(GetPosition().x, GetPosition().y + input.y - 1.7f, GetPosition().z);
	if ((bt1 != BTYPE_AIR || bt2 != BTYPE_AIR || bt3 != BTYPE_AIR) && m_position.y < 129.7f) {
		bt1 = world.BlockAt(GetPosition().x, GetPosition().y + .3f, GetPosition().z);
		if (bt1 == BTYPE_AIR) m_position.y = (int)m_position.y + .7f;
		m_velocity.y = input.y = 0;
		m_airborne = false;
	}
	else {
		if (abs(m_velocity.y) < 1.1f) m_velocity.y += input.y - 1.1f * elapsedTime;
		bt3 = world.BlockAt(GetPosition().x, GetPosition().y + m_velocity.y - 1.7f, GetPosition().z);
		bt1 = world.BlockAt(GetPosition().x, GetPosition().y + .3f, GetPosition().z);
		if (bt3 != BTYPE_AIR) {
			m_velocity.y = 0;
			m_airborne = false;
		}
		else if (bt1 != BTYPE_AIR) {
			m_velocity.y = -.1f;
		}
		else m_airborne = true;
	}

	bt1 = world.BlockAt(GetPosition().x + input.x, GetPosition().y, GetPosition().z);
	bt2 = world.BlockAt(GetPosition().x + input.x, GetPosition().y - 0.9f, GetPosition().z);
	bt3 = world.BlockAt(GetPosition().x + input.x, GetPosition().y - 1.7f, GetPosition().z);
	if (bt1 != BTYPE_AIR || bt2 != BTYPE_AIR || bt3 != BTYPE_AIR) {
		input.x = m_velocity.x = 0;
		m_velocity.z *= .5f;
	}

	bt1 = world.BlockAt(GetPosition().x, GetPosition().y, GetPosition().z + input.z);
	bt2 = world.BlockAt(GetPosition().x, GetPosition().y - 0.9f, GetPosition().z + input.z);
	bt3 = world.BlockAt(GetPosition().x, GetPosition().y - 1.7f, GetPosition().z + input.z);
	if (bt1 != BTYPE_AIR || bt2 != BTYPE_AIR || bt3 != BTYPE_AIR) {
		input.z = m_velocity.z = 0;
		m_velocity.x *= .5f;
	}

	/* Fin gestion de collisions */
	/* Gestion de la friction */

	if (!m_airborne) {
		m_velocity.x += input.x * 2.f * elapsedTime;
		m_velocity.z += input.z * 2.f * elapsedTime;

		if (input.x == 0.f) 
			m_velocity.x *= .8f;
		
		if (input.z == 0.f) 
			m_velocity.z *= .8f;
	}
	else {
		m_velocity.x += input.x * .4f * elapsedTime; // Techniquement contre les lois de la physique, mais c'est beaucoup moins chiant pour grimper sur les blocs.
		m_velocity.z += input.z * .4f * elapsedTime;
		m_velocity.x *= .99f;
		m_velocity.z *= .99f;
	}

	/* Fin gestion de la friction */

	float vy = m_velocity.y;
	m_velocity.y = 1.f; // Padding pour limiter le x et z lors du Normalize().
	if (m_velocity.Length() >= 1.f) m_velocity.Normalize(); // Limiteur de vitesse en x/z.
	m_velocity.y = 0;
	if (m_velocity.Length() < .005f) m_velocity.Zero(); // Threshold en x/z.
	m_velocity.y = vy;

	m_position += m_velocity;

	static float bobbingtime = 0; // Gestion de la caméra
	if (bobbingtime <= 360.f) bobbingtime += elapsedTime * 20.f; else bobbingtime = 0;
	m_POV = m_position.y;
	m_POV += m_airborne ? 0 : (sin(bobbingtime) - 0.5f) * (abs(m_velocity.x) + abs(m_velocity.z)) * .2f;
}

void Player::ApplyTransformation(Transformation& transformation, bool rel) const {
	transformation.ApplyRotation(-m_rotX, 1, 0, 0);
	transformation.ApplyRotation(-m_rotY, 0, 1, 0);
	if (rel) transformation.ApplyTranslation(-GetPOV());
}

Vector3f Player::GetPosition() const { return Vector3f(m_position.x + CHUNK_SIZE_X * WORLD_SIZE_X / 2, m_position.y, m_position.z + CHUNK_SIZE_Z * WORLD_SIZE_Y / 2);
}

Vector3f Player::GetVelocity() const { return m_velocity; }

Vector3f Player::GetPOV() const { return Vector3f(GetPosition().x, m_POV, GetPosition().z); }

Vector3f Player::GetDirection() const { return m_direction; }

void Player::Teleport(int& x, int& z) {
	m_position.x -= x * CHUNK_SIZE_X;
	m_position.z -= z * CHUNK_SIZE_Z;
}