#include "Entity.h"
#include "Dimension.h"
#include "Game.h"
#include "BlockType.h"

Entity::Entity( const EntityType* zType, Framework::Vec3<float> location, int dimensionId, int entityId )
    : Inventory( location, true ),
    speed( 0, 0, 0 ),
    faceDir( 1, 0, 0 ),
    zEntityType( zType ),
    currentDimensionId( dimensionId ),
    removed( 0 ),
    gravityMultiplier( 1.f ),
    id( entityId )
{}

void Entity::onDeath()
{}

void Entity::tick( const Dimension* zDimension, Game* zGame )
{
    Vec3<float> oldPos = location;
    // current block cooredinates
    int px = (int)floor( location.x );
    int py = (int)floor( location.y );
    int pz = (int)floor( location.z );
    // falling down
    speed.z -= (zDimension->getGravity() * gravityMultiplier) / 30.f;
    // movement in current tick
    Vec3<float> frameSpeed = speed / 30.f;
    // loop through all collided blocks
    bool needCollisionCheck = 1;
    while( needCollisionCheck )
    {
        needCollisionCheck = 0;
        // collision to neighbor of current block current block
        if( speed.x > 0 )
        {
            float xt = ((float)px + 1.f - oldPos.x) / frameSpeed.x;
            Vec3<float> tmp = oldPos + frameSpeed * xt;
            if( xt <= 1.f && tmp.y >= (float)py && tmp.y < (float)py + 1.f && tmp.z >= (float)pz && tmp.z < (float)pz + 1.f )
            {
                if( !getDefaultBlock( zGame->zBlockAt( Vec3<int>{ px + 1, py, pz }, zDimension->getDimensionId() ) )->isPassable() )
                {
                    frameSpeed.x = frameSpeed.x * (xt - 0.1f);
                    speed.x = 0;
                }
                else
                    px++;
                needCollisionCheck = 1;
                continue;
            }
        }
        if( speed.x < 0 )
        {
            float xt = ((float)px - oldPos.x) / frameSpeed.x;
            Vec3<float> tmp = oldPos + frameSpeed * xt;
            if( xt <= 1.f && tmp.y >= (float)py && tmp.y < (float)py + 1.f && tmp.z >= (float)pz && tmp.z < (float)pz + 1.f )
            {
                if( !getDefaultBlock( zGame->zBlockAt( Vec3<int>{ px - 1, py, pz }, zDimension->getDimensionId() ) )->isPassable() )
                {
                    frameSpeed.x = frameSpeed.x * (xt - 0.1f);
                    speed.x = 0;
                }
                else
                    px--;
                needCollisionCheck = 1;
                continue;
            }
        }
        if( speed.y > 0 )
        {
            float yt = ((float)py + 1.f - oldPos.y) / frameSpeed.y;
            Vec3<float> tmp = oldPos + frameSpeed * yt;
            if( yt <= 1.f && tmp.x >= (float)px && tmp.x < (float)px + 1.f && tmp.z >= (float)pz && tmp.z < (float)pz + 1.f )
            {
                if( !getDefaultBlock( zGame->zBlockAt( Vec3<int>{ px, py + 1, pz }, zDimension->getDimensionId() ) )->isPassable() )
                {
                    frameSpeed.y = frameSpeed.y * (yt - 0.1f);
                    speed.y = 0;
                }
                else
                    py++;
                needCollisionCheck = 1;
                continue;
            }
        }
        if( speed.y < 0 )
        {
            float yt = ((float)py - oldPos.y) / frameSpeed.y;
            Vec3<float> tmp = oldPos + frameSpeed * yt;
            if( yt <= 1.f && tmp.x >= (float)px && tmp.x < (float)px + 1.f && tmp.z >= (float)pz && tmp.z < (float)pz + 1.f )
            {
                if( !getDefaultBlock( zGame->zBlockAt( Vec3<int>{ px, py - 1, pz }, zDimension->getDimensionId() ) )->isPassable() )
                {
                    frameSpeed.y = frameSpeed.y * (yt - 0.1f);
                    speed.y = 0;
                }
                else
                    py--;
                needCollisionCheck = 1;
                continue;
            }
        }
        if( speed.z > 0 )
        {
            float zt = ((float)pz + 1.f - oldPos.z) / frameSpeed.z;
            Vec3<float> tmp = oldPos + frameSpeed * zt;
            if( zt <= 1.f && tmp.x >= (float)px && tmp.x < (float)px + 1.f && tmp.y >= (float)py && tmp.y < (float)py + 1.f )
            {
                if( !getDefaultBlock( zGame->zBlockAt( Vec3<int>{ px, py, pz + 1 }, zDimension->getDimensionId() ) )->isPassable() )
                {
                    frameSpeed.z = frameSpeed.z * (zt - 0.1f);
                    speed.z = 0;
                }
                else
                    pz++;
                needCollisionCheck = 1;
                continue;
            }
        }
        if( speed.z < 0 )
        {
            float zt = ((float)pz - oldPos.z) / frameSpeed.z;
            Vec3<float> tmp = oldPos + frameSpeed * zt;
            if( zt <= 1.f && tmp.x >= (float)px && tmp.x < (float)px + 1.f && tmp.y >= (float)py && tmp.y < (float)py + 1 )
            {
                if( !getDefaultBlock( zGame->zBlockAt( Vec3<int>{ px, py, pz - 1 }, zDimension->getDimensionId() ) )->isPassable() )
                {
                    frameSpeed.z = frameSpeed.z * (zt - 0.1f);
                    onFall( speed.z );
                    speed.z = 0;
                }
                else
                    pz--;
                needCollisionCheck = 1;
                continue;
            }
        }
    }
    location += frameSpeed;
}

void Entity::api( Framework::StreamReader* zRequest, NetworkResponse* zResponse )
{
    // TODO: answer api requests
}

void Entity::onFall( float collisionSpeed )
{
    if( collisionSpeed > 5 )
    {
        // TODO: take damage
    }
}

void Entity::setPosition( Framework::Vec3<float> pos )
{
    location = pos;
}

float Entity::getMaxHP() const
{
    return maxHP;
}

float Entity::getCurrentHP() const
{
    return currentHP;
}

float Entity::getStamina() const
{
    return stamina;
}

float Entity::getMaxStamina() const
{
    return maxStamina;
}

float Entity::getHunger() const
{
    return hunger;
}

float Entity::getMaxHunger() const
{
    return maxHunger;
}

float Entity::getThirst() const
{
    return thirst;
}

float Entity::getMaxThirst() const
{
    return maxThirst;
}

Framework::Vec3<float> Entity::getSpeed() const
{
    return speed;
}

Framework::Vec3<float> Entity::getFaceDir() const
{
    return faceDir;
}

Framework::Vec3<float> Entity::getPosition() const
{
    return location;
}

float Entity::getGravityMultiplier() const
{
    return gravityMultiplier;
}

int Entity::getCurrentDimensionId() const
{
    return currentDimensionId;
}

bool Entity::isRemoved() const
{
    return removed;
}

const EntityType* Entity::zType() const
{
    return zEntityType;
}

int Entity::getId() const
{
    return id;
}