/******************************************************************************
 *  Warmux is a convivial mass murder game.
 *  Copyright (C) 2001-2011 Warmux Team.
 *
 *  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 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 ******************************************************************************
 * Weapon gnu : a gnu jump in (more or less) random directions and explodes
 *****************************************************************************/

#include "character/character.h"
#include "game/config.h"
#include "game/game_time.h"
#include "graphic/sprite.h"
#include "interface/game_msg.h"
#include "map/camera.h"
#include "network/randomsync.h"
#include "object/objects_list.h"
#include "sound/jukebox.h"
#include "team/teams_list.h"
#include "tool/math_tools.h"
#include "tool/resource_manager.h"
#include "weapon/explosion.h"
#include "weapon/gnu.h"
#include "weapon/weapon_cfg.h"

const uint TIME_BETWEEN_REBOUND = 600;

class Gnu : public WeaponProjectile
{
  bool flipped;
  int save_x, save_y;
  uint last_rebound_time;
protected:
  void SignalOutOfMap();
public:
  Gnu(ExplosiveWeaponConfig& cfg,
      WeaponLauncher * p_launcher);
  void Shoot(Double strength);
  void Refresh();

  virtual void Explosion();
};

Gnu::Gnu(ExplosiveWeaponConfig& cfg,
         WeaponLauncher * p_launcher) :
  WeaponProjectile("gnu", cfg, p_launcher)
{
  explode_with_collision = false;
  explode_with_timeout = true;
  last_rebound_time = 0;
  image->EnableCaches(true, 0); // Only cache flipping
}

void Gnu::Shoot(Double strength)
{
  WeaponProjectile::Shoot(strength);

  save_x=GetX();
  save_y=GetY();

  Double angle = ActiveCharacter().GetFiringAngle();

  flipped = angle>=HALF_PI || angle<=-HALF_PI;
}

void Gnu::Refresh()
{
  if (m_energy == 0) {
    Explosion();
    return;
  }
  int tmp = GetMSSinceTimeoutStart();
  if (cfg.timeout && tmp > 1000 * (GetTotalTimeout()))
    SignalTimeout();

  Double norm, angle;
  //When we hit the ground, jump !
  if (!IsMoving()&& !FootsInVacuum()) {
    // Limiting number of rebound to avoid desync
    if (last_rebound_time + TIME_BETWEEN_REBOUND > GameTime::GetInstance()->Read()) {
      image->SetRotation_rad(ZERO);
      return;
    }
    last_rebound_time = GameTime::GetInstance()->Read();
    MSG_DEBUG("weapon.gnu", "Jump ! (time = %d)", last_rebound_time);
    //If the GNU is stuck in ground -> change direction
    int x = GetX();
    int y = GetY();
    if (x==save_x && y==save_y)
      flipped = !flipped;;
    save_x = x;
    save_y = y;

    //Do the jump
    norm = RandomSync().GetDouble(2.0, 5.0);
    PutOutOfGround();
    SetSpeedXY(Point2d((flipped) ? -norm : norm , - norm * THREE));
    JukeBox::GetInstance()->Play("default", "weapon/gnu_bounce");
  }

  //Due to a bug in the physic engine
  //sometimes, angle==infinite (according to gdb) ??
  GetSpeed(norm, angle);

  angle = RestrictAngle(angle)*ONE_HALF;
  if (flipped) {
    if (angle > ZERO)
      angle -= HALF_PI;
    else
      angle += HALF_PI;
  }

  image->SetRotation_rad(angle);
  image->SetFlipped(flipped);
  image->Update();
}

void Gnu::Explosion()
{
  WeaponProjectile::Explosion();
}

void Gnu::SignalOutOfMap()
{
  Weapon::Message(_("The Gnu left the battlefield before exploding!"));
  WeaponProjectile::SignalOutOfMap();
}

//-----------------------------------------------------------------------------

GnuLauncher::GnuLauncher() :
  WeaponLauncher(WEAPON_GNU, "gnulauncher", new ExplosiveWeaponConfig()),
  current_gnu(NULL),
  gnu_death_time(0)
{
  UpdateTranslationStrings();

  current_gnu = NULL;
  gnu_death_time = 0;

  m_category = SPECIAL;
  ReloadLauncher();

  // unit will be used when the gnu disappears
  use_unit_on_first_shoot = false;
}

void GnuLauncher::UpdateTranslationStrings()
{
  m_name = _("Gnu Launcher");
  m_help = _("Set timer 1-6 using +/- or 1-6 keys\nPress space to shoot\nOne shoot per turn");
}

bool GnuLauncher::p_Shoot()
{
  if (current_gnu || gnu_death_time)
    return false;

  current_gnu = static_cast<Gnu *>(projectile);
  gnu_death_time = 0;
  bool r = WeaponLauncher::p_Shoot();
  return r;
}

void GnuLauncher::Refresh()
{
  WeaponLauncher::Refresh();
  if (current_gnu)
    return;

  if (gnu_death_time && gnu_death_time + 2000 < GameTime::GetInstance()->Read()) {

    UseAmmoUnit();
    gnu_death_time = 0;
  }
}

bool GnuLauncher::IsOnCooldownFromShot() const
{
  return (current_gnu || gnu_death_time);
}

bool GnuLauncher::IsReady() const
{
  return !IsOnCooldownFromShot() && WeaponLauncher::IsReady();
}

void GnuLauncher::StopShooting()
{
  if (current_gnu)
    current_gnu->Explosion();
  WeaponLauncher::StopShooting();
}

bool GnuLauncher::IsPreventingLRMovement()
{
  return (current_gnu || gnu_death_time);
}

bool GnuLauncher::IsPreventingJumps()
{
  return (current_gnu || gnu_death_time);
}

bool GnuLauncher::IsPreventingWeaponAngleChanges()
{
  return (current_gnu || gnu_death_time);
}

void GnuLauncher::SignalEndOfProjectile()
{
  if (!current_gnu)
    return;

  current_gnu = NULL;
  gnu_death_time = GameTime::GetInstance()->Read();
}

WeaponProjectile * GnuLauncher::GetProjectileInstance()
{
  return new Gnu(cfg(), this);
}

std::string GnuLauncher::GetWeaponWinString(const char *TeamName, uint items_count ) const
{
  return Format(ngettext(
            "%s team has won %u Gnu! Blow them all, cowboy!",
            "%s team has won %u Gnus! Blow them all, cowboy!",
            items_count), TeamName, items_count);
}