/*
 * Copyright (C) Volition, Inc. 1999.  All rights reserved.
 *
 * All source code herein is the property of Volition, Inc. You may not sell 
 * or otherwise commercially exploit the source or things you created based on the 
 * source.
 *
*/ 



#ifndef _MISSION_CAMPAIGN_H
#define _MISSION_CAMPAIGN_H

#include "stats/scoring.h"
#include "parse/sexp.h"
#include "cfile/cfile.h"
#include "parse/sexp_container.h"

struct sexp_variable;

// name of the builtin campaign.
#define BUILTIN_CAMPAIGN		"FreeSpace2"

#define MAX_CAMPAIGN_MISSIONS	100			// maximum number of missions in a campaign

#define CAMPAIGN_ERROR_CORRUPT			-1
#define CAMPAIGN_ERROR_SEXP_EXHAUSTED	-2
#define CAMPAIGN_ERROR_MISSING			-3
#define CAMPAIGN_ERROR_SAVEFILE			-4
#define CAMPAIGN_ERROR_IGNORED			-5

// types of campaigns -- these defines match the string literals listed below which
// are found in the campaign files.  I don't think that we need campaigns for furball
// missions.
#define CAMPAIGN_TYPE_SINGLE			0
#define CAMPAIGN_TYPE_MULTI_COOP		1
#define CAMPAIGN_TYPE_MULTI_TEAMS		2

#define MAX_CAMPAIGN_TYPES				3

// type of movies we may be able to play
#define CAMPAIGN_MOVIE_PRE_MISSION		1
#define CMAPAIGN_MOVIE_POST_MISSION		2

#define CAMPAIGN_SINGLE_PLAYER_SIG     0xddddeeee
#define CAMPAIGN_MULTI_PLAYER_SIG      0xeeeeffff

// defines for possibly persistent information
#define CAMPAIGN_PERSISTENT_SHIP			1
#define CAMPAIGN_PERSISTENT_WEAPON		2

// Goober5000 - Bastion flag is not needed anymore; there can now be more than two main halls;
// but the flag is kept in order to maintain compatibility with older campaigns
#define CMISSION_FLAG_BASTION	(1<<0)	// set if stationed on Bastion, else Galatea

#define CMISSION_FLAG_SKIPPED				(1<<1)	// set if skipped, else not
#define CMISSION_FLAG_HAS_LOOP				(1<<2)	// mission loop, e.g. FS2 SOC loops
#define CMISSION_FLAG_HAS_FORK				(1<<3)	// campaign fork, e.g. Scroll or BWO (mutually exclusive with loop)

// internal flags start from the end, except for some flags that are grandfathered in
#define CMISSION_FLAG_FRED_LOAD_PENDING		(1<<31)	// originally handled by num_goals being set to -1
#define CMISSION_FIRST_INTERNAL_FLAG		CMISSION_FLAG_FRED_LOAD_PENDING

// all flags below FIRST_INTERNAL_FLAG, except SKIPPED, HAS_LOOP, and HAS_FORK
#define CMISSION_EXTERNAL_FLAG_MASK		((static_cast<unsigned int>(CMISSION_FIRST_INTERNAL_FLAG) - 1) & ~CMISSION_FLAG_SKIPPED & ~CMISSION_FLAG_HAS_LOOP & ~CMISSION_FLAG_HAS_FORK)

#define CAMPAIGN_LOOP_MISSION_UNINITIALIZED	-2

extern const char *campaign_types[MAX_CAMPAIGN_TYPES];


// campaign flags - Goober5000
#define CF_DEFAULT_VALUE			0
#define CF_CUSTOM_TECH_DATABASE		(1 << 0)	// Goober5000

// structure for a campaign definition.  It contains the mission names and other interesting
// information about a campaign and the mission strucuture within.

typedef struct mgoal {
	char	name[NAME_LENGTH];		// name of the goal (same as name in the mission_goal structure
	char	status;						// failed, satisfied, or incomplete (same as goal completion);
} mgoal;

typedef struct mevent {
	char	name[NAME_LENGTH];
	char	status;
} mevent;

class cmission
{
public:
	char				*name;					// name of the mission
	char				*notes;					// mission notes for mission (used by Fred)
	char				briefing_cutscene[NAME_LENGTH];	// name of the cutscene to be played before this mission
	int				formula;					// sexpression used to determine mission branching.
	int				completed;				// has the player completed this mission
	SCP_vector<mgoal> goals;				// vector of mgoals which has the goal completion status
	SCP_vector<mevent> events;				// vector of mevents which has the event completion status
	SCP_vector<sexp_variable> variables;	// vector of sexp_variables (of num_variables size) containing mission-persistent variables - Goober5000
	int				mission_loop_formula;	// formula to determine whether to allow a side loop
	char			*mission_branch_desc;	// message in popup
	char			*mission_branch_brief_anim;
	char			*mission_branch_brief_sound;
	int				level;					// what level of the tree it's on (Fred)
	int				pos;					// what x position on level it's on (Fred)
	int				flags;
	SCP_string		main_hall;				// which main hall the player is in - converted to SCP_string by CommanderDJ
	ubyte			debrief_persona_index;	// which persona is used for ranks/badges - Goober5000
	scoring_struct	stats;
};

class campaign
{
public:
	char	name[NAME_LENGTH];						// name of the campaign
	char	filename[CF_MAX_PATHNAME_LENGTH];			// filename the campaign info is in
	char	*desc;									// description of campaign
	int		type;									// type of campaign
	int		flags;									// flags - Goober5000
	int		num_missions;							// number of missions in the campaign
	int		num_missions_completed;					// number of missions in the campaign that have been flown
	int		current_mission;						// the current mission that the player is playing.  Only valid during the mission
	int		next_mission;							// number of the next mission to fly when comtinuing the campaign.  Always valid
	int		prev_mission;							// mission that we just came from.  Always valid
	int		loop_enabled;							// whether mission loop is chosen - true during a loop, false otherwise
	int		loop_mission;							// mission number of misssion loop (if any)
	int		loop_reentry;							// mission number to return to after loop is finished
	int		realign_required;						// are any missions missing alignment info? (Fred)
	int		num_players;							// valid in multiplayer campaigns -- number of players campaign supports.
	ubyte	ships_allowed[MAX_SHIP_CLASSES];		// which ships the player can use
	ubyte	weapons_allowed[MAX_WEAPON_TYPES];		// which weapons the player can use
	cmission	missions[MAX_CAMPAIGN_MISSIONS];	// decription of the missions
	SCP_vector<sexp_variable> persistent_variables;		// These variables will be saved at the end of a mission
	SCP_vector<sexp_variable> red_alert_variables;		// state of the variables in the previous mission of a Red Alert scenario.
	SCP_vector<sexp_container> persistent_containers;	// These containers will be saved at the end of a mission
	SCP_vector<sexp_container> red_alert_containers;		// state of the containers in the previous mission of a Red Alert scenario.

	campaign()
		: desc(nullptr), num_missions(0)
	{
		name[0] = 0;
		filename[0] = 0;
	}
};

extern campaign Campaign;

// campaign wasn't ended
extern int Campaign_ending_via_supernova;

// extern'ed so the mission loading can get a list of campains.  Only use this
// data after mission_campaign_build_list() is called
#define MAX_CAMPAIGNS	128
extern char *Campaign_names[MAX_CAMPAIGNS];
extern char *Campaign_file_names[MAX_CAMPAIGNS];
extern char *Campaign_descs[MAX_CAMPAIGNS];
extern int	Num_campaigns;
extern int	Campaign_names_inited;
extern SCP_vector<SCP_string> Ignored_campaigns;

extern char Default_campaign_file_name[MAX_FILENAME_LEN - 4];

extern bool Campaign_file_missing;	// if the campaign file is missing this will get set for us to check against
extern int Campaign_load_failure;

/*
 * initialise Player_loadout with default values
 */
void player_loadout_init();

// called at game startup time to load the default single player campaign
void mission_campaign_init( void );

// load up and initialize a new campaign
int mission_campaign_load(const char* filename, const char* full_path = nullptr, player* pl = nullptr, int load_savefile = 1);

bool campaign_is_ignored(const char *filename);

// declaration for local campaign save game load function
extern void mission_campaign_savefile_delete(const char* cfilename);
extern void mission_campaign_delete_all_savefiles( char *pilot_name );

// if a given campaign is a multiplayer campaign, we can load and save the multiplayer info portion with these functions
extern int mission_campaign_parse_is_multi(const char *filename, char *name);

// function which sets up internal variable for player to play next mission in the campaign
extern int mission_campaign_next_mission( void );

// function which is called with the current mission in this campaign is over
extern void mission_campaign_mission_over( bool do_next_mission = true );

// frees all memory at game close time
extern void mission_campaign_clear( void );

// used by Fred to get a mission's list of goals.
void read_mission_goal_list(int num);

void mission_campaign_build_list(bool desc = false, bool sort = true, bool multiplayer = false);
void mission_campaign_free_list();

// returns index of mission with passed name
extern int mission_campaign_find_mission( const char *name );

// maybe play a movie.  type indicates before or after mission
extern void mission_campaign_maybe_play_movie(int type);

// save persistent information
extern void mission_campaign_save_persistent( int type, int index );

// The following are functions I added to set up the globals and then
// execute the corresponding mission_campaign_savefile functions.

// get name and type of specified campaign file
int mission_campaign_get_info(const char *filename, char *name, int *type, int *max_players, char **desc = nullptr, char **first_mission = nullptr);

// get a listing of missions in a campaign
int mission_campaign_get_mission_list(const char *filename, char **list, int max);

// load up a campaign for the current player.
int mission_load_up_campaign(bool fall_back_from_current = false);

// stores mission goals and events in Campaign struct
void mission_campaign_store_goals_and_events();

// stores variables which will be saved only on mission progression
void mission_campaign_store_variables(int persistence_type, bool store_red_alert = true);

// stores containers which will be saved only on mission progression
void mission_campaign_store_containers(ContainerType persistence_type, bool store_red_alert = true);

// does all three of the above
void mission_campaign_store_goals_and_events_and_variables();

// evaluates next mission and possible loop mission
void mission_campaign_eval_next_mission();

// returns to the beginning of the previous mission
int mission_campaign_previous_mission();

// proceeds to next mission in campaign
void mission_campaign_skip_to_next();

// break out of loop
void mission_campaign_exit_loop();

// jump to specified mission
void mission_campaign_jump_to_mission(const char* name, bool no_skip = false);

// stuff for the end of the campaign of the single player game
void mission_campaign_end_init();
void mission_campaign_end_close();
void mission_campaign_end_do();

// save eternal variables
extern void mission_campaign_save_on_close_variables();

// save eternal containers
extern void mission_campaign_save_on_close_containers();

extern void mission_campaign_load_failure_popup();

SCP_string mission_campaign_get_name(const char* filename);

// End CSFE stuff
#endif