/*
 * staffs.c: staff code 
 *
 * Copyright (c) 1989 James E. Wilson, Robert A. Koeneke 
 *
 * This software may be copied and distributed for educational, research, and
 * not for profit purposes provided that this copyright and statement are
 * included in all such copies. 
 */

#include "constant.h"
#include "monster.h"
#include "config.h"
#include "types.h"
#include "externs.h"

#ifdef USG
#include <string.h>
#else
#include <strings.h>
#endif


/* Use a staff.					-RAK-	 */
void 
use()
{
    int32u                i;
    int                   j, k, item_val, chance, y, x;
    register int          ident;
    register struct misc *m_ptr;
    register inven_type  *i_ptr;

    free_turn_flag = TRUE;
    if (inven_ctr == 0)
	msg_print("But you are not carrying anything.");
    else if (!find_range(TV_STAFF, TV_NEVER, &j, &k))
	msg_print("You are not carrying any staffs.");
    else if (get_item(&item_val, "Use which staff?", j, k, 0)) {
	i_ptr = &inventory[item_val];
	free_turn_flag = FALSE;
	m_ptr = &py.misc;
	chance = m_ptr->save + stat_adj(A_INT)
	    - (int)(i_ptr->level>50?50:i_ptr->level)
		+ (class_level_adj[m_ptr->pclass][CLA_DEVICE] * m_ptr->lev / 3);
	if (py.flags.confused > 0)
	    chance = chance / 2;
	if ((chance < USE_DEVICE) && (randint(USE_DEVICE - chance + 1) == 1))
	    chance = USE_DEVICE;   /* Give everyone a slight chance */
	if (chance <= 0)
	    chance = 1;
	if (randint(chance) < USE_DEVICE)
	    msg_print("You failed to use the staff properly.");
	else if (i_ptr->p1 > 0) {
	    i = i_ptr->flags;
	    ident = FALSE;
	    (i_ptr->p1)--;
	    switch (i) {
	      case ST_HEALING:
		ident = hp_player(300);
		if (py.flags.stun > 0) {
		    if (py.flags.stun > 50) {
			py.misc.ptohit += 20;
			py.misc.ptodam += 20;
		    } else {
			py.misc.ptohit += 5;
			py.misc.ptodam += 5;
		    }
		    py.flags.stun = 0;
		    ident = TRUE;
		    msg_print("Your head stops stinging.");
		}
		if (py.flags.cut > 0) {
		    py.flags.cut = 0;
		    ident = TRUE;
		    msg_print("You feel better.");
		}
		break;
	      case ST_GENOCIDE:
		genocide(FALSE);
		ident = TRUE;
		break;
	      case ST_PROBE:
		probing();
		ident = TRUE;
		break;
	      case ST_IDENTIFY:
		ident_spell();
		ident = TRUE;
		break;
	      case ST_HOLYNESS:
		dispel_creature(EVIL, 120);
		protect_evil();
		cure_poison();
		remove_fear();
		hp_player(50);
		if (py.flags.stun > 0) {
		    if (py.flags.stun > 50) {
			py.misc.ptohit += 20;
			py.misc.ptodam += 20;
		    } else {
			py.misc.ptohit += 5;
			py.misc.ptodam += 5;
		    }
		    py.flags.stun = 0;
		    ident = TRUE;
		    msg_print("Your head stops stinging.");
		}
		if (py.flags.cut > 0) {
		    py.flags.cut = 0;
		    ident = TRUE;
		    msg_print("You feel better.");
		}
		ident = TRUE;
		break;
	      case ST_MAGI:
		if (res_stat(A_INT)) {
		    msg_print("You have a warm feeling.");
		    ident = TRUE;
		}
		m_ptr = &py.misc;
		if (m_ptr->cmana < m_ptr->mana) {
		    m_ptr->cmana = m_ptr->mana;
		    ident = TRUE;
		    msg_print("Your feel your head clear.");
		    prt_cmana();
		}
		break;
	      case ST_POWER:
		dispel_creature(0xFFFFFFFFL, 120);
		break;
	      case ST_SURROUND:
		map_area();
		ident = TRUE;
		break;
	      case ST_LIGHT:
		ident = light_area(char_row, char_col, damroll(2, 10), 2);
		break;
	      case ST_DR_LC:
		ident = detect_sdoor();
		break;
	      case ST_TRP_LC:
		ident = detect_trap();
		break;
	      case ST_TRE_LC:
		ident = detect_treasure();
		break;
	      case ST_OBJ_LC:
		ident = detect_object();
		break;
	      case ST_TELE:
		teleport(100);
		ident = TRUE;
		break;
	      case ST_EARTH:
		ident = TRUE;
		earthquake();
		break;
	      case ST_SUMMON:
		ident = FALSE;
		for (k = 0; k < randint(4); k++) {
		    y = char_row;
		    x = char_col;
		    ident |= summon_monster(&y, &x, FALSE);
		}
		break;
	      case ST_DEST:
		ident = TRUE;
		destroy_area(char_row, char_col);
		break;
	      case ST_STAR:
		ident = TRUE;
		starlite(char_row, char_col);
		break;
	      case ST_HAST_MN:
		ident = speed_monsters(1);
		break;
	      case ST_SLOW_MN:
		ident = speed_monsters(-1);
		break;
	      case ST_SLEE_MN:
		ident = sleep_monsters2();
		break;
	      case ST_CURE_LT:
		ident = hp_player(randint(8));
		break;
	      case ST_DET_INV:
		ident = detect_invisible();
		break;
	      case ST_SPEED:
		if (py.flags.fast == 0)
		    ident = TRUE;
		if (py.flags.fast <= 0)
		    py.flags.fast += randint(30) + 15;
		else
		    py.flags.fast += randint(5);
		break;
	      case ST_SLOW:
		if (py.flags.slow == 0)
		    ident = TRUE;
		py.flags.slow += randint(30) + 15;
		break;
	      case ST_REMOVE:
		if (remove_curse()) {
		    if (py.flags.blind < 1)
			msg_print("The staff glows blue for a moment..");
		    ident = TRUE;
		}
		break;
	      case ST_DET_EVI:
		ident = detect_evil();
		break;
	      case ST_CURING:
		if ((cure_blindness()) || (cure_poison()) ||
		    (cure_confusion()) || (py.flags.stun > 0) || (py.flags.cut > 0))
		    ident = TRUE;
		if (py.flags.stun > 0) {
		    if (py.flags.stun > 50) {
			py.misc.ptohit += 20;
			py.misc.ptodam += 20;
		    } else {
			py.misc.ptohit += 5;
			py.misc.ptodam += 5;
		    }
		    py.flags.stun = 0;
		    msg_print("Your head stops stinging.");
		} else if (py.flags.cut > 0) {
		    py.flags.cut = 0;
		    msg_print("You feel better.");
		}
		break;
	      case ST_DSP_EVI:
		ident = dispel_creature(EVIL, 60);
		break;
	      case ST_DARK:
		ident = unlight_area(char_row, char_col);
		break;
	      default:
		msg_print("Internal error in staffs()");
		break;
	    }
	    if (ident) {
		if (!known1_p(i_ptr)) {
		    m_ptr = &py.misc;
		/* round half-way case up */
		    m_ptr->exp += (i_ptr->level + (m_ptr->lev >> 1)) /
			m_ptr->lev;
		    prt_experience();

		    identify(&item_val);
		    i_ptr = &inventory[item_val];
		}
	    } else if (!known1_p(i_ptr))
		sample(i_ptr);
	    desc_charges(item_val);
	} else {
	    msg_print("The staff has no charges left.");
	    if (!known2_p(i_ptr))
		add_inscribe(i_ptr, ID_EMPTY);
	}
    }
}