/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef NUVIE_CORE_PARTY_H
#define NUVIE_CORE_PARTY_H

#include "ultima/shared/std/string.h"
#include "ultima/nuvie/core/obj_manager.h"
#include "ultima/nuvie/core/map.h"

namespace Ultima {
namespace Nuvie {

class Configuration;
class Game;
class Actor;
class ActorManager;
class MapCoord;
class Map;
class NuvieIO;
class PartyPathFinder;
class PartySeek;

typedef enum { TARGET_ACTOR, TARGET_LOCATION, TARGET_NONE } CombatTargetType;

struct CombatTarget {
	CombatTargetType type;
	uint8 actor_num;
	MapCoord loc;
};

struct PartyMember {
	char name[14];
	Actor *actor;
//bool inactive; // true if not in formation
	uint8 combat_position;
	sint8 form_x; // relative position left or right of leader
	sint8 form_y; // relative position in front or in back of leader
	// (leader is at 0,0 in formation)
	CombatTarget target;
};

#define PARTY_MAX_MEMBERS 16
#define PARTY_NAME_MAX_LENGTH 13

#define PARTY_KEEP_PARTY_FLAG true

/* party walking formations: */
#define PARTY_FORM_STANDARD 0
#define PARTY_FORM_COLUMN   1
#define PARTY_FORM_ROW      2
#define PARTY_FORM_DELTA    3
#define PARTY_FORM_COMBAT   7
#define PARTY_FORM_REST     8

/*   0 <- standard  *
 *  1 2             *
 * 4 3 5            *
 *  6 7             *
 *                  *
 * 0 <- column      * 3210 <- row
 * 1                * 7654
 * 2                *
 * 3...             *
 *                  *
 *    0 <- delta
 *   172
 *  38 94
 * 5A   B6
 *
 * (Combat positions are dynamic, based on combat mode)
 */

class Party {
protected:
	friend class PartyPathFinder;
	Game *game; // get pointers here to avoid construct order issues in loadGame()
	const Configuration *config;
	ActorManager *actor_manager;
	Map *map;
	PartyPathFinder *pathfinder;

	PartyMember member[PARTY_MAX_MEMBERS];
	uint8 lightsources;
	uint8 num_in_party; // number of party members.
	uint8 formation; // walking formation
	uint16 prev_leader_x; // last location of leader
	uint16 prev_leader_y;

	bool autowalk; // party is automatically walking to a destination
	bool in_vehicle; //Party is in a vehicle.
	bool in_combat_mode;

	bool defer_removing_dead_members;

	Obj *rest_campfire;

public:

	Party(const Configuration *cfg);
	virtual ~Party();

	virtual bool init(Game *g, ActorManager *am);
	virtual bool load(NuvieIO *objlist);
	virtual bool save(NuvieIO *objlist);

// Basic methods
	void follow(sint8 rel_x, sint8 rel_y); // follow in direction leader moved
	bool move(uint16 dx, uint16 dy, uint8 dz);
	void show(); // Actor::show()
	void hide(); // Actor::hide()
	virtual void dismount_from_horses();
	virtual void update_music(); // set music depending on party location
	virtual void split_gold();
	virtual void gather_gold();
	bool add_actor(Actor *actor);
	bool remove_actor(Actor *actor, bool keep_party_flag = false);
	bool remove_dead_actor(Actor *actor);
	bool resurrect_dead_members();
	void heal();
	void cure();
	void set_ethereal(bool ethereal);
//void set_active(uint8 member_num, bool state) { member[member_num].inactive = !state; }
	uint8 get_formation() const {
		return formation;    // walking formation
	}
	void set_formation(uint8 val) {
		formation = val;
		reform_party();
	}
// Properties
	uint8 get_party_size();
	virtual uint8 get_party_max() {
		return 8;    // U6
	}
	sint8 get_leader() const; // returns -1 if party has no leader and can't move
	MapCoord get_leader_location() const;
	MapCoord get_location(uint8 m = 0) const;
	MapCoord get_formation_coords(uint8 m) const;
	void set_in_vehicle(bool value);
	void set_in_combat_mode(bool value);
	bool is_in_vehicle() const {
		return in_vehicle;
	}
	bool is_in_combat_mode() const {
		return in_combat_mode;
	}
	Actor *get_slowest_actor(); // actor with lowest move count

// Check specific actors
	uint8 get_actor_num(uint8 member_num) const; //get actor id_n from party_member num.
	Actor *get_actor(uint8 member_num) const;
	sint8 get_member_num(const Actor *actor) const;
	sint8 get_member_num(uint8 a) const;
	Actor *get_leader_actor() const;
	const char *get_actor_name(uint8 member_num) const;
	bool is_leader(const Actor *actor) const {
		return (get_member_num(actor) == get_leader());
	}
	bool contains_actor(const Actor *actor) const;
	bool contains_actor(uint8 actor_num) const;

// Check entire party
	bool is_at(uint16 x, uint16 y, uint8 z, uint32 threshold = 0) const;
	bool is_at(const MapCoord &xyz, uint32 threshold = 0) const;
	bool is_anyone_at(uint16 x, uint16 y, uint8 z, uint32 threshold = 0) const;
	bool is_anyone_at(const MapCoord &xyz, uint32 threshold = 0) const;
	bool has_obj(uint16 obj_n, uint8 quality, bool match_zero_qual = true) const;
	bool remove_obj(uint16 obj_n, uint8 quality);
	Actor *who_has_obj(uint16 obj_n, uint8 quality, bool match_zero_qual = true);
	Obj *get_obj(uint16 obj_n, uint8 quality, bool match_qual_zero = true, uint8 frame_n = 0, bool match_frame_n = false);
	bool is_horsed() const; // is anyone on a horse?
	bool is_everyone_horsed() const;
	Obj *get_food(); // used while resting

// Automatic-walking. These methods should be replaced with ActorActions.
	void walk(MapCoord *walkto, MapCoord *teleport, uint32 step_delay = 0);
	void walk(MapCoord *walkto, uint32 step_delay = 0) {
		walk(walkto, nullptr, step_delay);
	}
	void walk(Obj *moongate, MapCoord *teleport, uint32 step_delay = 0);
	void enter_vehicle(Obj *ship_obj, uint32 step_delay = 0);
	void exit_vehicle(uint16 x, uint16 y, uint16 z);
	void stop_walking(bool force_music_change);
	bool get_autowalk() const {
		return autowalk;
	}
	void rest_gather();
	void rest_sleep(uint8 hours, sint16 guard);
	bool can_rest(Std::string &err_str);

	void set_combat_target(uint8 member_num, Actor *target);
	void set_combat_target(uint8 member_num, MapCoord target);
	void clear_combat_target(uint8 member_num);
	CombatTarget get_combat_target(uint8 member_num);
	bool has_light_source();
	void add_light_source() {
		lightsources++; /* fprintf(stderr, "lightsources = %d\n", lightsources); */
	}
	void subtract_light_source() { /*assert(lightsources != 0);*/
		lightsources--; /*fprintf(stderr, "lightsources = %d\n", lightsources); */
	}
	void update_light_sources();

	bool combat_changes_music, vehicles_change_music;

protected:
	void reform_party(); // call when adding or removing members

};

} // End of namespace Nuvie
} // End of namespace Ultima

#endif