/* lists.c  --  new global lists code
 *
 * Added by Shaney, 29 May 1995.
 * Revised by maxxe, 15 Dec 2023.
 * This file is part of FICS.
 */

#include "stdinclude.h"
#include "common.h"

#include <string.h>

#include "command.h"
#include "comproc.h"
#include "gamedb.h"
#include "lists.h"
#include "maxxes-utils.h"
#include "multicol.h"
#include "playerdb.h"
#include "ratings.h"
#include "rmalloc.h"
#include "talkproc.h"
#include "utils.h"

PRIVATE List *firstGlobalList = NULL;

PRIVATE ListTable ListArray[] = {
	{P_HEAD,	"admin"},
	{P_GOD,		"removedcom"},
	{P_ADMIN,	"filter"},
	{P_ADMIN,	"ban"},
	{P_ADMIN,	"abuser"},
	{P_ADMIN,	"muzzle"},
	{P_ADMIN,	"cmuzzle"},
	{P_PUBLIC,	"fm"},
	{P_PUBLIC,	"im"},
	{P_PUBLIC,	"gm"},
	{P_PUBLIC,	"blind"},
	{P_PUBLIC,	"teams"},
	{P_PUBLIC,	"computer"},
	{P_PUBLIC,	"td"},
	{P_PERSONAL,	"censor"},
	{P_PERSONAL,	"gnotify"},
	{P_PERSONAL,	"noplay"},
	{P_PERSONAL,	"notify"},
	{P_PERSONAL,	"channel"},
	{0, NULL},
};

/*
 * find a list.
 * loads from disk if not in memory.
 */
PRIVATE List *
list_find(int p, enum ListWhich l)
{
	List	*prev = NULL, *tempList, **starter;
	int	 count = 0;
	int	 personal;

	personal	= ListArray[l].rights == P_PERSONAL;
	starter		= (personal ? &parray[p].lists : &firstGlobalList);

	for (tempList = *starter; tempList != NULL; tempList = tempList->next) {
		if (l == tempList->which) {
			if (prev != NULL) {
				prev->next	= tempList->next;
				tempList->next	= *starter;
				*starter	= tempList;
			}

			return tempList;
		}

		prev = tempList;
	}

	if ((tempList = rmalloc(sizeof(List))) == NULL)
		return NULL;
	if (!personal) { // now we have to load the list
		FILE	*fp;
		char	 filename[MAX_FILENAME_SIZE] = { '\0' };
		char	 listmember[100] = { '\0' };

		msnprintf(filename, sizeof filename, "%s/%s", lists_dir,
		    ListArray[l].name);

		if ((fp = fopen(filename, "r")) == NULL) {
			rfree(tempList);
			return NULL;
		}
		while (fgets(listmember, ARRAY_SIZE(listmember), fp) != NULL) {
			listmember[strcspn(listmember, "\n")] = '\0';
			tempList->member[count++] = xstrdup(listmember);
		}

		fclose(fp);
	}

	tempList->which		= l;
	tempList->numMembers	= count;
	tempList->next		= *starter;
	*starter		= tempList;
	return tempList;
}

/*
 * Add item to list
 */
PUBLIC int
list_add(int p, enum ListWhich l, char *s)
{
	List *gl;

	if ((gl = list_find(p, l)) != NULL) {
		if (gl->numMembers < MAX_GLOBAL_LIST_SIZE) {
			gl->member[gl->numMembers] = xstrdup(s);
			gl->numMembers++;
			return 0;
		} else {
			return 1;
		}
	} else {
		return 1;
	}
}

/*
 * Remove item from list.
 */
PUBLIC int
list_sub(int p, enum ListWhich l, char *s)
{
	List *gl;

	if ((gl = list_find(p, l)) != NULL) {
		int i, found = -1;

		for (i = 0; i < gl->numMembers; i++) {
			if (!strcasecmp(s, gl->member[i])) {
				found = i;
				break;
			}
		}

		if (found == -1)
			return 1;

		rfree(gl->member[found]);

		for (i = found; i < (gl->numMembers - 1); i++)
			gl->member[i] = gl->member[i + 1];

		gl->numMembers--;

		return 0;
	}

	return 1;
}

/* pretty cheesy: print each member of a list, 1 per line */
PUBLIC void
list_print(FILE *fp, int p, enum ListWhich l)
{
	List *gl;

	if ((gl = list_find(p, l)) != NULL) {
		for (int i = 0; i < gl->numMembers; i++)
			fprintf(fp, "%s\n", gl->member[i]);
	}
}

/*
 * Return size of a list.
 */
PUBLIC int
list_size(int p, enum ListWhich l)
{
	List *gl;

	if ((gl = list_find(p, l)) != NULL)
		return (gl->numMembers);
	return 0;
}

/*
 * Find list by name
 * (doesn't have to be the whole name)
 */
PRIVATE List *
list_findpartial(int p, char *which, int gonnado)
{
	List	*gl;
	int	 foundit, slen;

	foundit     = -1;
	slen        = strlen(which);

	for (int i = 0; ListArray[i].name != NULL; i++) {
		if (!strncasecmp(ListArray[i].name, which, slen)) {
			if (foundit == -1)
				foundit = i;
			else
				return NULL; // ambiguous
		}
	}

	if (foundit != -1) {
		int	rights = ListArray[foundit].rights;
		int	youlose = 0;

		switch (rights) { // check rights
		case P_HEAD:
			if (gonnado && !player_ishead(p))
				youlose = 1;
			break;
		case P_GOD:
			if ((gonnado && parray[p].adminLevel < ADMIN_GOD) ||
			    (!gonnado && parray[p].adminLevel < ADMIN_ADMIN))
				youlose = 1;
			break;
		case P_ADMIN:
			if (parray[p].adminLevel < ADMIN_ADMIN)
				youlose = 1;
			break;
		case P_PUBLIC:
			if (gonnado && (parray[p].adminLevel < ADMIN_ADMIN))
				youlose = 1;
			break;
		}

		if (youlose) {
			pprintf(p, "\"%s\" is not an appropriate list name or "
			    "you have insufficient rights.\n", which);
			return NULL;
		}

		gl = list_find(p, foundit);
	} else {
		pprintf(p, "\"%s\" does not match any list name.\n", which);
		return NULL;
	}

	return gl;
}

/*
 * See if something is in a list
 */
PUBLIC int
in_list(int p, enum ListWhich which, char *member)
{
	List	*gl;
	int	 filterList = (which == L_FILTER);

	if ((gl = list_find(p, which)) == NULL || member == NULL)
		return 0;
	for (int i = 0; i < gl->numMembers; i++) {
		if (filterList) {
			if (!strncasecmp(member, gl->member[i],
			    strlen(gl->member[i])))
				return 1;
		} else {
			if (!strcasecmp(member, gl->member[i]))
				return 1;
		}
	}
	return 0;
}

/*
 * Add or subtract something to/from a list.
 */
PUBLIC int
list_addsub(int p, char *list, char *who, int addsub)
{
	List	*gl;
	char	*listname, *member;
	char	*yourthe, *addrem;
	int	 p1 = -1, connected, loadme, personal, ch;

	if ((gl = list_findpartial(p, list, addsub)) == NULL)
		return COM_OK;

	personal	= (ListArray[gl->which].rights == P_PERSONAL);
	loadme		= (gl->which != L_FILTER &&
	    gl->which != L_REMOVEDCOM &&
	    gl->which != L_CHANNEL);
	listname	= ListArray[gl->which].name;
	yourthe		= (personal ? "your" : "the");
	addrem		= (addsub == 1 ? "added to" : "removed from");

	if (loadme) {
		if (!FindPlayer(p, who, &p1, &connected)) {
			if (addsub == 1)
				return COM_OK;
			member = who; // allow sub removed/renamed player
			loadme = 0;
		} else
			member = parray[p1].name;
	} else {
		member = who;
	}

	if (addsub == 1) { // add to list
		if (gl->which == L_CHANNEL) {
			if (sscanf(who, "%d", &ch) == 1) {
				if (!in_list(p, L_ADMIN, parray[p].name) &&
				    ch == 0) {
					pprintf(p, "Only admins may join "
					    "channel 0.\n");
					return COM_OK;
				}

				if (ch > (MAX_CHANNELS - 1)) {
					pprintf(p, "The maximum channel "
					    "number is %d.\n",
					    (MAX_CHANNELS - 1));
					return COM_OK;
				}
			} else {
				pprintf(p, "Your channel to add must be a "
				    "number between 0 and %d.\n",
				    (MAX_CHANNELS - 1));
				return COM_OK;
			}
		}

		if (in_list(p, gl->which, member)) {
			pprintf(p, "[%s] is already on %s %s list.\n", member,
			    yourthe, listname);

			if (loadme && !connected)
				player_remove(p1);
			return COM_OK;
		}

		if (list_add(p, gl->which, member)) {
			pprintf(p, "Sorry, %s %s list is full.\n", yourthe,
			    listname);

			if (loadme && !connected)
				player_remove(p1);
			return COM_OK;
		}
	} else if (addsub == 2) { // subtract from list
		if (!in_list(p, gl->which, member)) {
			pprintf(p, "[%s] is not in %s %s list.\n", member,
			    yourthe, listname);

			if (loadme && !connected)
				player_remove(p1);
			return COM_OK;
		}

		list_sub(p, gl->which, member);
	}

	pprintf(p, "[%s] %s %s %s list.\n", member, addrem, yourthe, listname);

	if (!personal) {
		FILE	*fp;
		char	 filename[MAX_FILENAME_SIZE] = { '\0' };

		switch (gl->which) {
		case L_MUZZLE:
		case L_CMUZZLE:
		case L_ABUSER:
		case L_BAN:
			pprintf(p, "Please leave a comment to explain why %s "
			    "was %s the %s list.\n", member, addrem, listname);
			pcommand(p, "addcomment %s %s %s list.\n", member,
			    addrem, listname);
			break;
		case L_COMPUTER:
			if (p1 < 0) {
				warnx("%s: negative player number", __func__);
				break;
			}
			if (parray[p1].b_stats.rating > 0) {
				UpdateRank(TYPE_BLITZ, member,
				    &parray[p1].b_stats, member);
			}
			if (parray[p1].s_stats.rating > 0) {
				UpdateRank(TYPE_STAND, member,
				    &parray[p1].s_stats, member);
			}
			if (parray[p1].w_stats.rating > 0) {
				UpdateRank(TYPE_WILD, member,
				    &parray[p1].w_stats, member);
			}
			break;
		case L_ADMIN:
			if (p1 < 0) {
				warnx("%s: negative player number", __func__);
				break;
			}
			if (addsub == 1) { // adding to list
				parray[p1].adminLevel = 10;
				pprintf(p, "%s has been given an admin level "
				    "of 10 - change with asetadmin.\n", member);
			} else {
				parray[p1].adminLevel = 0;
			}
			break;
		case L_FILTER:
			pprintf(p, "Please leave a message for filter to "
			    "explain why site %s was %s filter list.\n", member,
			    addrem);
			break;
		case L_REMOVEDCOM:
			pprintf(p, "Please leave a message on anews to explain "
			    "why %s was %s removedcom list.\n", member, addrem);
			break;
		default:
			break;
		}

		if (loadme && connected) {
			pprintf_prompt(p1, "You have been %s the %s list "
			    "by %s.\n", addrem, listname, parray[p].name);
		}

		msnprintf(filename, sizeof filename, "%s/%s", lists_dir,
		    listname);

		if ((fp = fopen(filename, "w")) == NULL) {
			fprintf(stderr, "Couldn't save %s list.\n", listname);
		} else {
			for (int i = 0; i < gl->numMembers; i++)
				fprintf(fp, "%s\n", gl->member[i]);
			fclose(fp);
		}
	}

	if (loadme || gl->which == L_ADMIN)
		player_save(p1);
	if (loadme && !connected)
		player_remove(p1);
	return COM_OK;
}

PUBLIC int
com_addlist(int p, param_list param)
{
	return list_addsub(p, param[0].val.word, param[1].val.word, 1);
}

PUBLIC int
com_sublist(int p, param_list param)
{
	return list_addsub(p, param[0].val.word, param[1].val.word, 2);
}

PUBLIC int
com_showlist(int p, param_list param)
{
	List	*gl;
	char	*rightnames[] = {
		"EDIT HEAD, READ ADMINS",
		"EDIT GODS, READ ADMINS",
		"READ/WRITE ADMINS",
		"PUBLIC",
		"PERSONAL"
	};
	int	 i, rights;

	if (param[0].type == 0) { // Show all lists
		pprintf(p, "Lists:\n\n");

		for (i = 0; ListArray[i].name != NULL; i++) {
			if ((rights = ListArray[i].rights) > P_ADMIN ||
			    parray[p].adminLevel >= ADMIN_ADMIN) {
				pprintf(p, "%-20s is %s\n", ListArray[i].name,
				    rightnames[rights]);
			}
		}
	} else { // find match in index
		if ((gl = list_findpartial(p, param[0].val.word, 0)) == NULL)
			return COM_OK;

		{ // display the list
			multicol *m = multicol_start(gl->numMembers);

			pprintf(p, "-- %s list: %d %s --",
			    ListArray[gl->which].name,
			    gl->numMembers,
			    ((!strcmp(ListArray[gl->which].name, "filter"))
			    ? "ips"
			    : (!strcmp(ListArray[gl->which].name, "removedcom"))
			    ? "commands"
			    : (!strcmp(ListArray[gl->which].name, "channel"))
			    ? "channels"
			    : "names"));
			for (i = 0; i < gl->numMembers; i++)
				multicol_store_sorted(m, gl->member[i]);
			multicol_pprint(m, p, 78, 2);
			multicol_end(m);
		}
	}

	return COM_OK;
}

PUBLIC int
list_channels(int p, int p1)
{
	List	*gl;

	if ((gl = list_findpartial(p1, "channel", 0)) == NULL)
		return 1;

	if (gl->numMembers == 0)
		return 1;

	{
		multicol *m = multicol_start(gl->numMembers);

		for (int i = 0; i < gl->numMembers; i++)
			multicol_store_sorted(m, gl->member[i]);
		multicol_pprint(m, p, 78, 1);
		multicol_end(m);
	}

	return 0;
}

/*
 * Free the memory used by a list.
 */
PUBLIC void
list_free(List *gl)
{
	List *temp;

	while (gl) {
		for (int i = 0; i < gl->numMembers; i++)
			strfree(gl->member[i]);
		temp = gl->next;
		rfree(gl);
		gl = temp;
	}
}

PUBLIC int
titled_player(int p, char *name)
{
	if (in_list(p, L_FM, name) ||
	    in_list(p, L_IM, name) ||
	    in_list(p, L_GM, name))
		return 1;
	return 0;
}