/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

### File Specific:
   main-programmer: Silvan Nellen
   co-programmer: Benjamin Knecht
*/


#include "playable.h"
#include "event_handler.h"

#include "player.h"
#include "state.h"
#include "camera.h"

#include "util/loading/load_param.h"

#include "power_ups/weapon_power_up.h"
#include "power_ups/param_power_up.h"

#include "game_rules.h"

#include "dot_emitter.h"
#include "sprite_particles.h"

#include "shared_network_data.h"

#include "effects/explosion.h"

#include "shell_command.h"
SHELL_COMMAND_STATIC(orxoWeapon, Playable, Playable::addSomeWeapons_CHEAT);


Playable::Playable()
    : weaponMan(this),
    supportedPlaymodes(Playable::Full3D),
    playmode(Playable::Full3D)
{
  this->setClassID(CL_PLAYABLE, "Playable");
  PRINTF(4)("PLAYABLE INIT\n");

  this->toList(OM_GROUP_01);

  // the reference to the Current Player is NULL, because we dont have one at the beginning.
  this->currentPlayer = NULL;

  this->bFire = false;
  this->oldFlags = 0;

  this->setSynchronized(true);

  this->score = 0;
  this->oldScore = 0;

  this->bDead = false;
}


/**
 * @brief destroys the Playable
 */
Playable::~Playable()
{
  // THE DERIVED CLASS MUST UNSUBSCRIBE THE PLAYER THROUGH
  // this->setPlayer(NULL);
  // IN ITS DESTRUCTOR.
  assert(this->currentPlayer == NULL);
}

/**
 * @brief loads Playable parameters onto the Playable
 * @param root the XML-root to load from
 */
void Playable::loadParams(const TiXmlElement* root)
{
  WorldEntity::loadParams(root);

  LoadParam(root, "abs-dir", this, Playable, setPlayDirection);
}

/**
 * @brief picks up a powerup
 * @param powerUp the PowerUp that should be picked.
 * @returns true on success (pickup was picked, false otherwise)
 *
 * This function also checks if the Pickup can be picked up by this Playable
 */
bool Playable::pickup(PowerUp* powerUp)
{
  if(powerUp->isA(CL_WEAPON_POWER_UP))
  {
    return dynamic_cast<WeaponPowerUp*>(powerUp)->process(&this->getWeaponManager());
  }
  else if(powerUp->isA(CL_PARAM_POWER_UP))
  {
    ParamPowerUp* ppu = dynamic_cast<ParamPowerUp*>(powerUp);
    switch(ppu->getType())
    {
      case POWERUP_PARAM_HEALTH:
        this->increaseHealth(ppu->getValue());
        return true;
      case POWERUP_PARAM_MAX_HEALTH:
        this->increaseHealthMax(ppu->getValue());
        return true;
    }
  }
  return false;
}

/**
 * @brief adds a Weapon to the Playable.
 * @param weapon the Weapon to add.
 * @param configID the Configuration ID to add this weapon to.
 * @param slotID the slotID to add the Weapon to.
 */
bool Playable::addWeapon(Weapon* weapon, int configID, int slotID)
{
  if(this->weaponMan.addWeapon(weapon, configID, slotID))
  {
    this->weaponConfigChanged();
    return true;
  }
  else
  {
    if (weapon != NULL)
      PRINTF(2)("Unable to add Weapon (%s::%s) to %s::%s\n",
                weapon->getClassName(), weapon->getName(), this->getClassName(), this->getName());
    else
      PRINTF(2)("No weapon defined\n");
    return false;

  }
}

/**
 * @brief removes a Weapon.
 * @param weapon the Weapon to remove.
 */
void Playable::removeWeapon(Weapon* weapon)
{
  this->weaponMan.removeWeapon(weapon);

  this->weaponConfigChanged();
}

/**
 * @brief jumps to the next WeaponConfiguration
 */
void Playable::nextWeaponConfig()
{
  this->weaponMan.nextWeaponConfig();
  this->weaponConfigChanged();
}

/**
 * @brief moves to the last WeaponConfiguration
 */
void Playable::previousWeaponConfig()
{
  this->weaponMan.previousWeaponConfig();
  this->weaponConfigChanged();
}

/**
 * @brief tells the Player, that the Weapon-Configuration has changed.
 *
 * TODO remove this
 * This function is needed, so that the WeponManager of this Playable can easily update the HUD
 */
void Playable::weaponConfigChanged()
{
  if (this->currentPlayer != NULL)
    this->currentPlayer->weaponConfigChanged();
}

/**
 * @brief a Cheat that gives us some Weapons
 */
void Playable::addSomeWeapons_CHEAT()
{
  if (State::getPlayer() != NULL)
  {
    Playable* playable = State::getPlayer()->getPlayable();
    if (playable != NULL)
    {
      PRINTF(2)("ADDING WEAPONS - you cheater\n");
      playable->addWeapon(Weapon::createWeapon(CL_HYPERBLASTER));
      playable->addWeapon(Weapon::createWeapon(CL_TURRET));
      playable->addWeapon(Weapon::createWeapon(CL_AIMING_TURRET));
      playable->addWeapon(Weapon::createWeapon(CL_CANNON));
      playable->addWeapon(Weapon::createWeapon(CL_TARGETING_TURRET));
      PRINTF(2)("ADDING WEAPONS FINISHED\n");
    }
  }
}

/**
 * @brief subscribe to all events the controllable needs
 * @param player the player that shall controll this Playable
 * @returns false on error true otherwise.
 */
bool Playable::setPlayer(Player* player)
{
  // if we already have a Player inside do nothing
  if (this->currentPlayer != NULL && player != NULL)
  {
    return false;
  }

  // eject the Player if player == NULL
  if (this->currentPlayer != NULL && player == NULL)
  {
    PRINTF(4)("Player gets ejected\n");

    // unsubscibe all events.
    EventHandler* evh = EventHandler::getInstance();
    std::vector<int>::iterator ev;
    for (ev = this->events.begin(); ev != events.end(); ev++)
      evh->unsubscribe( ES_GAME, (*ev));

    // leave the entity
    this->leave();

    // eject the current Player.
    Player* ejectPlayer = this->currentPlayer;
    this->currentPlayer = NULL;
    // eject the Player.
    ejectPlayer->setPlayable(NULL);

    return true;
  }

  // get the new Player inside
  if (this->currentPlayer == NULL && player != NULL)
  {
    PRINTF(4)("New Player gets inside\n");
    this->currentPlayer = player;
    if (this->currentPlayer->getPlayable() != this)
      this->currentPlayer->setPlayable(this);

    /*EventHandler*/
    EventHandler* evh = EventHandler::getInstance();
    std::vector<int>::iterator ev;
    for (ev = this->events.begin(); ev != events.end(); ev++)
      evh->subscribe(player, ES_GAME, (*ev));

    this->enter();
    return true;
  }

  return false;
}

/**
 * @brief attaches the current Camera to this Playable
 *
 * this function can be derived, so that any Playable can make the attachment differently.
 */
void Playable::attachCamera()
{
  State::getCameraNode()->setParentSoft(this);
  State::getCameraTargetNode()->setParentSoft(this);

}

/**
 * @brief detaches the Camera
 * @see void Playable::attachCamera()
 */
void  Playable::detachCamera()
{}


/**
 * @brief sets the CameraMode.
 * @param cameraMode: the Mode to switch to.
 */
void Playable::setCameraMode(unsigned int cameraMode)
{
  State::getCamera()->setViewMode((Camera::ViewMode)cameraMode);
}


/**
 * @brief sets the Playmode
 * @param playmode the Playmode
 * @returns true on success, false otherwise
 */
bool Playable::setPlaymode(Playable::Playmode playmode)
{
  if (!this->playmodeSupported(playmode))
    return false;
  else
  {
    this->enterPlaymode(playmode);
    this->playmode = playmode;
    return true;
  }
}

/**
 * @brief This function look, that the Playable rotates to the given rotation.
 * @param angle the Angle around
 * @param dirX directionX
 * @param dirY directionY
 * @param dirZ directionZ
 * @param speed how fast to turn there.
 */
void Playable::setPlayDirection(float angle, float dirX, float dirY, float dirZ, float speed)
{
  this->setPlayDirection(Quaternion(angle, Vector(dirX, dirY, dirZ)), speed);
}

/**
 * @brief all Playable will enter the Playmode Differently, say here how to do it.
 * @param playmode the Playmode to enter.
 *
 * In this function all the actions that are required to enter the Playmode are described.
 * e.g: camera, rotation, wait cycle and so on...
 *
 * on enter of this function the playmode is still the old playmode.
 */
void Playable::enterPlaymode(Playable::Playmode playmode)
{
  switch(playmode)
  {
    default:
      this->attachCamera();
      break;
    case Playable::Horizontal:
      this->setCameraMode(Camera::ViewTop);
      break;
    case Playable::Vertical:
      this->setCameraMode(Camera::ViewLeft);
      break;
    case Playable::FromBehind:
      this->setCameraMode(Camera::ViewBehind);
      break;
  }
}
/**
 * @brief helps us colliding Playables
 * @param entity the Entity to collide
 * @param location where the collision occured.
 */
void Playable::collidesWith(WorldEntity* entity, const Vector& location)
{
  if (entity == collider)
    return;
  collider = entity;

  if ( entity->isA(CL_PROJECTILE) && ( !State::isOnline() || SharedNetworkData::getInstance()->isGameServer() ) )
  {
    this->decreaseHealth(entity->getHealth() *(float)rand()/(float)RAND_MAX);
    // EXTREME HACK
    if (this->getHealth() <= 0.0f)
    {
      this->die();
    }
  }
}


void Playable::respawn()
{
  PRINTF(0)("Playable respawn\n");
  // only if this is the spaceship of the player
  if( this == State::getPlayer()->getPlayable())
    State::getGameRules()->onPlayerSpawn();


  if( this->getOwner() % 2 == 0)
  {
    //     this->toList(OM_GROUP_00);
    this->setAbsCoor(213.37, 57.71, -47.98);
    this->setAbsDir(0, 0, 1, 0);
  }
  else
  { // red team
    //     this->toList(OM_GROUP_01);
    this->setAbsCoor(-314.450, 40.701, 83.554);
    this->setAbsDir(1.0, -0.015, -0.012, 0.011);
  }
  this->reset();
  this->bDead = false;
}



void Playable::die()
{
  Explosion::explode(dynamic_cast<PNode*>(this), Vector(1.0f, 1.0f, 1.0f));


  if( !this->bDead)
  {
    PRINTF(0)("Playable dies\n");
    // only if this is the spaceship of the player
    if (State::isOnline())
    {
      if( this == State::getPlayer()->getPlayable())
        State::getGameRules()->onPlayerDeath();

      //     this->toList(OM_GROUP_05);
      //HACK: moves the entity to an unknown place far far away: in the future, GameRules will look for that
      this->setAbsCoor(-2000.0, -2000.0, -2000.0);

      //explosion hack

    }
    this->bDead = true;
  }
}





/**
 * @brief add an event to the event list of events this Playable can capture
 * @param eventType the Type of event to add
 */
void Playable::registerEvent(int eventType)
{
  this->events.push_back(eventType);

  if (this->currentPlayer != NULL)
    EventHandler::getInstance()->subscribe(this->currentPlayer, ES_GAME, eventType);
}

/**
 * @brief remove an event to the event list this Playable can capture.
 * @param event the event to unregister.
 */
void Playable::unregisterEvent(int eventType)
{
  std::vector<int>::iterator rmEvent = std::find(this->events.begin(), this->events.end(), eventType);
  this->events.erase(rmEvent);

  if (this->currentPlayer != NULL)
    EventHandler::getInstance()->unsubscribe(ES_GAME, eventType);
}

/**
 * @brief ticks a Playable
 * @param dt: the passed time since the last Tick
 */
void Playable::tick(float dt)
{
  this->weaponMan.tick(dt);
  if (this->bFire)
    weaponMan.fire();
}


/**
 * @brief processes Playable events.
 * @param event the Captured Event.
 */
void Playable::process(const Event &event)
{
  if( event.type == KeyMapper::PEV_FIRE1)
    this->bFire = event.bPressed;
  else if( event.type == KeyMapper::PEV_NEXT_WEAPON && event.bPressed)
  {
    this->nextWeaponConfig();
  }
  else if ( event.type == KeyMapper::PEV_PREVIOUS_WEAPON && event.bPressed)
    this->previousWeaponConfig();
}


#define DATA_FLAGS    1
#define DATA_SCORE    2

#define FLAGS_bFire   1

int Playable::writeSync( const byte * data, int length, int sender )
{
  SYNCHELP_READ_BEGIN();

  byte b;
  SYNCHELP_READ_BYTE( b, NWT_PL_B );

  byte flags;

  if ( b == DATA_FLAGS )
  {
    SYNCHELP_READ_BYTE( flags, NWT_PL_FLAGS );

    bFire = (flags & FLAGS_bFire) != 0;

    return SYNCHELP_READ_N;
  }

  if ( b == DATA_SCORE )
  {
    int newScore;
    SYNCHELP_READ_BYTE( newScore, NWT_PL_SCORE );
    setScore( newScore );

    return SYNCHELP_READ_N;
  }

  return SYNCHELP_READ_N;
}

int Playable::readSync( byte * data, int maxLength )
{
  SYNCHELP_WRITE_BEGIN();

  if ( score != oldScore && isServer() )
  {
    SYNCHELP_WRITE_BYTE( DATA_SCORE, NWT_PL_B);
    SYNCHELP_WRITE_INT( score, NWT_PL_SCORE );
    oldScore = score;

    return SYNCHELP_WRITE_N;
  }

  byte flags = 0;

  if ( bFire )
    flags |= FLAGS_bFire;


  SYNCHELP_WRITE_BYTE( DATA_FLAGS, NWT_PL_B);
  SYNCHELP_WRITE_BYTE( flags, NWT_PL_FLAGS );
  oldFlags = flags;


  return SYNCHELP_WRITE_N;
}

bool Playable::needsReadSync( )
{
  if ( score != oldScore && isServer() )
    return true;

  byte flags = 0;

  if ( bFire )
    flags |= FLAGS_bFire;

  return flags!=oldFlags;
}


/**
 * @brief converts a string into a Playable::Playmode.
 * @param playmode the string naming the Playable::Playmode to convert.
 * @returns the Playable::Playmode converted from playmode.
 */
Playable::Playmode Playable::stringToPlaymode(const std::string& playmode)
{
  if (playmode == "Vertical")
    return Playable::Vertical;
  if (playmode == "Horizontal")
    return Playable::Horizontal;
  if (playmode == "FromBehind")
    return Playable::FromBehind;
  if (playmode == "Full3D")
    return Playable::Full3D;

  return Playable::Full3D;
}


/**
 * @brief converts a playmode into a string.
 * @param playmode the Playable::Playmode to convert.
 * @returns the String.
 */
const char* Playable::playmodeToString(Playable::Playmode playmode)
{
  switch(playmode)
  {
    case Playable::Vertical:
      return "Vertical";
    case Playable::Horizontal:
      return "Horizontal";
    case Playable::FromBehind:
      return "FromBehind";
    case Playable::Full3D:
      return "Full3D";

    default:
      return "Full3D";
  }

}