#include <assert.h>
#include <ctype.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "attack.h"
#include "defs.h"
#include "flag.h"
#include "god.h"
#include "io.h"
#include "lf.h"
#include "map.h"
#include "move.h"
#include "nexus.h"
#include "objects.h"
#include "shops.h"
#include "spell.h"
#include "text.h"

#define DEF_REMCURSECOST 60
#define DEF_BLESSCOST 50
#define DEF_IDCOST 20
#define DEF_SURCHARGE 15
#define DEF_RESIZECOST 80
#define DEF_REPAIRCOSTPERHP 2

extern enum GAMEMODE gamemode;
extern prompt_t prompt;
extern lifeform_t *player;
extern WINDOW *mainwin;

// "buf" is the name of an object
//
// this function will adjust the object name to avoid objects which shouldn't appear in shops.
// returns TRUE if the name was modified.
int apply_shopob_restrictions(char *buf) {
	if (strstr(buf, "gold dollar")) {
		strcpy(buf, "potion of water");
		return B_TRUE;
	}
	if (strstr(buf, "credit card")) {
		strcpy(buf, "paper clip");
		return B_TRUE;
	}
	return B_FALSE;
}

// dir == 1 means  "better skills increase the price"
// dir == -1 means "better skills decrease the price"
float applyshoppricemod(float origprice, lifeform_t *lf, object_t *shop, enum SHOPACTION action) {
	float newprice;
	float pricepct = 100;
	int dir;
	if (action == SA_BUY) {
		dir = -1;
	} else {
		dir = 1;
	}
	if (lf) {
		enum SKILLLEVEL slev;
		// price goes up/down for charisma (+/- 25%)
		// high bonus = lower price.
		pricepct += ((getstatmod(lf, A_CHA)/2) * dir);
		
		// reduce based on speech (up to -30%);
		slev = getskill(lf, SK_SPEECH);
		if (slev) {
			int modamt;
			modamt = ((int)(slev*5))*dir;
			pricepct += modamt;
		}
	}

	if (shop) {
		flag_t *f;
		f = hasflag(shop->flags, F_SHOPDONATED);
		if (f) {
			pricepct += ((((float)f->val[0]) / 100.0) * dir);
		}
	}

	// -30 - +30 percent discount/penalty in aligned 
	// temples based on your god's happiness
	if (lf && shop) {
		if (shop->type->id == OT_TEMPLE) {
			flag_t *f;
			f = hasflag(shop->flags, F_LINKGOD);
			if (f && godprayedto(f->val[0])) { 
				enum PIETYLEV plev;
				plev = getpietylev(f->val[0], NULL, NULL);
				pricepct += ((plev*10) * dir);
			}
		}
	}

	newprice = pctof(pricepct, origprice);

	if (origprice > 0) {
		limitf(&newprice, 1, NA);
	}
	return newprice;
}

int canafford(lifeform_t *lf, int amt) {
	int goldamt = 0,gemamt = 0;
	goldamt = countmoney(lf->pack);
	if (getskill(lf, SK_SPEECH) >= PR_BEGINNER) {
		gemamt = applyshoppricemod(counthighestobflagvalue(lf->pack, F_GEM), lf, NULL, SA_BUY); // adjust using charisma etc
	}
	if ((goldamt >= amt ) || (gemamt >= amt) || hasob(lf->pack, OT_CREDITCARD)) {
		return B_TRUE;
	}
	return B_FALSE;
}

int getshopblessprice(object_t *o, object_t *shop) {
	int cost = 0;
	int remcursecost, blesscost,surcharge;
	remcursecost = applyshoppricemod(DEF_REMCURSECOST, player, shop, SA_BUY);
	blesscost = applyshoppricemod(DEF_BLESSCOST, player, shop, SA_BUY);
	surcharge = applyshoppricemod(DEF_SURCHARGE, player, shop, SA_BUY);

	if (iscursed(o)) {
		cost = remcursecost;
		if (isequipped(o)) cost += surcharge;
	} else {
		cost = blesscost;
	}

	cost *= o->amt;

	return cost;
}

int isalignedtemple(object_t *shop) {
	flag_t *f;
	f = hasflag(shop->flags, F_LINKGOD);
	if (f && godprayedto(f->val[0])) { 
		return B_TRUE;
	}
	return B_FALSE;
}

int obmatchessellflag(object_t *o, flag_t *f, enum SHOPACTION action) {
	if ((f->val[0] == F_NONE) || hasflag(o->flags, f->val[0])) {
		if ((f->val[2] == NA) || (o->type->obclass->id == f->val[2])) {
			if ((action == SA_SELL) && (f->val[1] == NA)) {
			} else {
				return B_TRUE;
			}
		}
	}
	return B_FALSE;
}

void shop(lifeform_t *lf, object_t *vm) {
	int y,i,done;
	int curmenu = 0;
	char ch,buf[BUFLEN];
	char toptext[BUFLEN],shopname[BUFLEN];
	int ntaken = 0;
	int ngiven = 0;
	flag_t *f;
	object_t *o;

	strcpy(toptext, "");

	taketime(lf, getactspeed(lf));

	if (!isplayer(lf)) {
		if (cansee(player, lf)) {
			char lfname[BUFLEN];
			getlfname(lf, lfname);
			getobname(vm, shopname, 1);
			msg("%s browses through %s.", lfname, shopname);
		}
		return;
	}

	// closed?
	f = shopisclosed(vm);
	if (f) {
		sayphrase(NULL, f->val[2], SV_TALK, hoursto12(f->val[0]), NULL, player);
		return;
	}

	if (lfhasflag(lf, F_STENCH)) {
		msg("\"Pheeew!  You're not coming in smelling like that.\"");
		return;
	}
	if (hasflagval(vm->flags, F_BANNEDLF, lf->id, NA, NA, NULL)) {
		if (!lfhasflag(lf, F_ANONYMOUS)) {
			msg("\"You are not welcome here, thief!\"");
			return;
		}
	}

	// temple to dead god?
	if (vm->type->id == OT_TEMPLE) {
		flag_t *f;
		lifeform_t *god = NULL;
		f = hasflag(vm->flags, F_LINKGOD);
		if (f) {
			god = findgod(f->val[0]);
		}
		if (!god) {
			msg("This temple seems to have been abandoned.");
			return;
		}
	}

	getobname(vm, shopname, 1);
	makeuppercase(shopname);

	// assign letters to objects
	ch = 'a';
	for (o = vm->contents->first ; o ; o = o->next) {
		o->letter = ch;
		if (++ch > 'z') ch = 'A';
	}

	// list objects for sale and ask for input
	done = B_FALSE;
	while (!done) {
		enum SHOPRETURN (*shopfunc)(lifeform_t *, object_t *, int, char *, int *) = NULL;
		int *shoparg = NULL;


		cls();
		mvwprintw(mainwin, 0, 0, toptext);
		y = 2;
		centre(mainwin,C_WHITE,  y, noprefix(shopname));
		y += 2;

		// check for special sm_xxx menu ids first
		if (curmenu == SM_ABSOLVE) {
			shopfunc = shopabsolve;
			shoparg = NULL;
		} else if (curmenu == SM_BLESS) {
			shopfunc = shopbless;
			shoparg = NULL;
		} else if (curmenu == SM_MIRACLE) {
			shopfunc = shopmiracle;
			shoparg = NULL;
		} else if (curmenu == SM_PURCHASEITEMS) {
			shopfunc = shoppurchase;
			shoparg = &ntaken;
		} else if (curmenu == SM_DETECTCURSE) {
			shopfunc = shopdetectcurse;
			shoparg = NULL;
		} else if (curmenu == SM_DONATE) {
			shopfunc = shopdonate;
			shoparg = &ngiven;
		} else if (curmenu == SM_ID) {
			shopfunc = shopid;
			shoparg = &ngiven;
		} else if (curmenu == SM_REST) {
			shopfunc = shoprest;
			shoparg = &ngiven;
		} else if (curmenu == SM_RESIZE) {
			shopfunc = shopresize;
			shoparg = &ngiven;
		} else if (curmenu == SM_REPAIR) {
			shopfunc = shoprepair;
			shoparg = &ngiven;
		} else if (curmenu == SM_SELLITEMS) {
			shopfunc = shopsell;
			shoparg = &ngiven;
		}

		if (shopfunc) {
			switch (shopfunc(lf, vm, y, toptext, shoparg)) {
				case SR_BACK:
					curmenu = 0;
					break;
				case SR_CONTINUE:
					break;
				case SR_QUIT:
					done = B_TRUE;
					break;
			}
		} else {
			flag_t *retflag[MAXCANDIDATES];
			int nretflags,curidx = 0,found = B_TRUE;
			// show menu items
			getflags(vm->flags, retflag, &nretflags, F_SHOPMENU, F_NONE);
			while (found) {
				found = B_FALSE;
				for (i = 0; i < nretflags; i++) {
					f = retflag[i];
					// check menu id
					if ((f->val[0] / 100) != curmenu) continue;
					// check menuitem index
					if ((f->val[0] % 100) == curidx) {
						snprintf(buf, BUFLEN, "%c - %s", f->text[0], f->text + 2);
						mvwprintw(mainwin, y, 0, "%s", buf);
						y++;
						found = B_TRUE;
						curidx++;
					}
				}
			}
			// ask for selection
			y += 2;
	
			// ask what to do
			mvwprintw(mainwin, y, 0, "What will you do (ESC to exit)? ");
			ch = getch();
			// handle selection
			if (ch == 27) {
				done = B_TRUE;
			} else {
				flag_t *selection = NULL;
				// find matching menu item
				for (i = 0; i < nretflags; i++) {
					f = retflag[i];
					// check menu id
					if ((f->val[0] / 100) != curmenu) continue;
					// check menuitem index
					if (f->text[0] == ch) {
						// handle the action.
						selection = f;
					}
				}
				if (selection) {
					switch (selection->val[1]) {
						case MA_GOTOMENU:
							curmenu = selection->val[2];
							break;
						case MA_QUIT:
							done = B_TRUE;
							break;
					}
				}
			}
		} // end if curmenu == -1 or something else
	} // end while not done

	restoregamewindows();
	if (hasflagval(vm->flags, F_BANNEDLF, lf->id, NA, NA, NULL)) {
		msg("\"...and stay out!\"");
	} else if (hasflag(lf->flags, F_RESTINGINMOTEL)) {
		switch (rnd(1,2)) {
			case 1: snprintf(buf, BUFLEN, "Sleep well!"); break;
			case 2: snprintf(buf, BUFLEN, "Enjoy your stay!"); break;
			case 3: snprintf(buf, BUFLEN, "Sweet dreams!"); break;
		}
		msg("\"%s\"", buf);
		more();
	} else if (vm->type->id == OT_TEMPLE) {
		strcpy(buf, "");
		// message based on the god...
		f = hasflag(vm->flags, F_LINKGOD);
		if (f) {
			switch (f->val[0]) {
				case R_GODDEATH:
					switch (rnd(1,2)) {
						case 1: snprintf(buf, BUFLEN, "Go forth and kill!"); break;
						case 2: snprintf(buf, BUFLEN, "Hecta's favour be with you!"); break;
					}
					break;
				case R_GODMERCY:
					switch (rnd(1,3)) {
						case 1: snprintf(buf, BUFLEN, "Go in peace."); break;
						case 2: snprintf(buf, BUFLEN, "Peace be with you."); break;
						case 3: snprintf(buf, BUFLEN, "Remain merciful, traveller."); break;
					}
					break;
				case R_GODPURITY:
					switch (rnd(1,2)) {
						case 1: snprintf(buf, BUFLEN, "Stay pure, friend."); break;
						case 2: snprintf(buf, BUFLEN, "May the purity of Amberon ride with you."); break;
					}
					break;
				case R_GODTHIEVES:
					switch (rnd(1,3)) {
						case 1: snprintf(buf, BUFLEN, "May your lockpicks never break!"); break;
						case 2: snprintf(buf, BUFLEN, "Safe passage, friend."); break;
						case 3: snprintf(buf, BUFLEN, "Felix's favour be with you!"); break;
					}
					break;
			}
		}
		if (strlen(buf)) {
			msg("\"%s\"", buf);
		}
	} else if (ntaken > ngiven) {
		switch (rnd(1,2)) {
			case 1: snprintf(buf, BUFLEN, "Pleasure doing business with you!"); break;
			case 2: snprintf(buf, BUFLEN, "Thank you, come again!"); break;
		}
		msg("\"%s\"", buf);
	} else if (ngiven > ntaken) {
		switch (rnd(1,2)) {
			case 1: snprintf(buf, BUFLEN, "Thank you again for your generosity!"); break;
			case 2: snprintf(buf, BUFLEN, "I look forward to your next visit!"); break;
		}
		msg("\"%s\"", buf);
	} else {
		switch (rnd(1,2)) {
			case 1: snprintf(buf, BUFLEN, "See you next time."); break;
			case 2: snprintf(buf, BUFLEN, "Farewell!"); break;
		}
		msg("\"%s\"", buf);
	}
}

enum SHOPRETURN shopdetectcurse(lifeform_t *lf, object_t *vm, int starty, char *toptext, int *ndonated) {
	object_t *o;
	char ch;
	int y;
	int cost = 0,possible = B_TRUE;
	y = starty;

	// calculate cost
	for (o = lf->pack->first ; o; o = o->next) {
		if (!o->blessknown && !hasflag(o->flags, F_NOBLESS)) {
			cost += 10;
		}
	}

	if (!cost) {
		mvwprintw(mainwin, y, 0, "You do not seem to possess anything which merits our services.");
		y += 2;
		possible = B_FALSE;
	} else {
		// aligned templte?
		if (isalignedtemple(vm)) {
			cost = 0;
		} else {
			cost = applyshoppricemod(cost, lf, vm, SA_BUY);
		}
		// ask what to detect
		if (cost) {
			mvwprintw(mainwin, y, 0, "It will cost $%d to perform an divination on your items.", cost);
		} else {
			mvwprintw(mainwin, y, 0, "For a fellow worshipper, we will perform divinations on your items for free.", cost);
		}
		y += 2;
		if (countmoney(lf->pack) < cost) {
			mvwprintw(mainwin, y, 0, "Unfortunately, you cannot afford this.", cost);
			y += 2;
			possible = B_FALSE;
		}
	}
	
	if (possible){
		if (cost) {
			mvwprintw(mainwin, y, 0, "Pay to detect auras on your items (you have $%d) [yn]? ", countmoney(lf->pack));
		} else {
			mvwprintw(mainwin, y, 0, "Detect auras on your items [yn]? ");
		}
	} else {
		mvwprintw(mainwin, y, 0, "[Press a key to return]");
	}
	ch = getch();
	if (possible && (ch == 'y')) {
		givemoney(player, NULL, cost);
		dospelleffects(lf, OT_S_DETECTAURA, 10, lf, NULL, NULL, B_BLESSED, NULL, B_FALSE, NULL);
		more();
	}
	return SR_BACK;
}

enum SHOPRETURN shopdonate(lifeform_t *lf, object_t *vm, int starty, char *toptext, int *ndonated) {
	int count = 0;
	object_t *o;
	// ask what to donate
	
	/*
	switch (vm->type->id) {
		case OT_SHOPARMOUR: wantflag = F_ARMOURRATING; wantoc = OC_ARMOUR; break;
		case OT_SHOPWEAPON: wantflag = F_DAM; wantoc = OC_WEAPON; break;
		case OT_TEMPLE: wantflag = F_NONE; wantoc = OC_MONEY; break;
		default: wantflag = F_NONE; wantoc = OC_NONE; break;
	}
	*/
	o = doaskobject(lf->pack, "What will you donate?", NULL, &count, B_TRUE, B_FALSE, B_FALSE, '\0', vm, SA_DONATE, NULL, B_FALSE);

	// validate it 
	if (o) {
		long goldgiven = 0;
		long multi = 0;
		flag_t *f;
		// can we remove it?
		if (isequipped(o)) {
			if (takeoff(lf, o)) {
				more(); 
				return SR_CONTINUE;
			}
		}

		// confirm count for gold
		if (o->type->obclass->id == OC_MONEY) {
			char answer[BUFLEN],buf[BUFLEN];
			snprintf(buf, BUFLEN, "How much money will you donate (you have $%d)?", o->amt);
			askstring(buf, '?', answer, BUFLEN, NULL);
			count = atoi(answer);
			if (count <= 0) {
				return SR_CONTINUE;
			}
			if (count > o->amt) count = o->amt;
		}

		if (o->type->id == OT_GOLD) {
			givemoney(lf, NULL, count);
			(*ndonated)++;
			goldgiven += count;
		} else {
			object_t *newob;
			char let;
			int thisval,pct = 100;
			if (vm->contents->first) {
				let = vm->contents->last->letter + 1;
			} else {
				let = 'a';
			}

			thisval = getobvalue(o);
			if (!isknown(o)) {
				pct -= 50;
			}
			if (!isidentified(o)) {
				pct -= 25;
			}
			thisval = pctof(pct, thisval);

			newob = moveob(o, vm->contents, count);
			newob->letter = let;
			(*ndonated)++;
			practice(player, SK_SPEECH, 1);
			goldgiven += thisval;
		}

		if ((vm->type->id == OT_TEMPLE) && goldgiven) {
			flag_t *f;
			f = hasflag(o->flags, F_LINKGOD);
			if (f) { 
				lifeform_t *god = NULL;
				god = findgod(f->val[0]);
				msg("\"%s appreciates your kind donation.\"", god->race->name);
				modpiety(god->race->id, (goldgiven/2));
			} else {
				msg("\"We appreciate your kind donation.\"");
			}
		} else {
			sayphrase(NULL, SP_THANKS, SV_TALK, NA, NULL, player);
			more();
		}

		f = hasflag(vm->flags, F_SHOPDONATED);
		if (f) {
			f->val[0] += goldgiven;
		} else {
			addflag(vm->flags, F_SHOPDONATED, goldgiven, NA, NA, NULL);
		}



		// remember amount donated, for addition to final score
		f = lfhasflagval(lf, F_SCOREBONUS, NA, NA, NA, SCB_DONATIONS);
		if (f) {
			multi = f->val[1];
			goldgiven += f->val[0];
		} else {
			f = addflag(lf->flags, F_SCOREBONUS, 0, NA, NA, SCB_DONATIONS);
			multi = 0;
		}
		// cope with >= 65535
		while (goldgiven > 65535) {
			goldgiven -= 65535;
			multi++;
		}
		f->val[0] = goldgiven;
		f->val[1] = multi;
	} else {
		return SR_BACK;
	}
	angergodmaybe(R_GODTHIEVES, 10, GA_MONEY);
	more();

	return SR_CONTINUE;
}

enum SHOPRETURN shopabsolve(lifeform_t *lf, object_t *vm, int starty, char *toptext, int *ndonated) {
	char ch;
	int y;
	int piety,cost = 0,possible = B_TRUE;
	flag_t *f;
	lifeform_t *god = NULL;
	y = starty;


	// get linked god
	f = hasflag(vm->flags, F_LINKGOD);
	god = findgod(f->val[0]);
	
	piety = getpiety(god->race->id);



	if (piety < 100) {
		cost = (100 - piety) * 3;
		cost = applyshoppricemod(cost, lf, vm, SA_BUY);
		mvwprintw(mainwin, y, 0, "It will cost $%d to absolve your sins against %s.", cost, god->race->name);
		y += 2;
	} else {
		mvwprintw(mainwin, y, 0, "You do not appear to have sinned against %s.", god->race->name);
		y += 2;
		possible = B_FALSE;
	}

	if (possible) {
		if (countmoney(lf->pack) >= cost) {
			mvwprintw(mainwin, y, 0, "Pay for absolution (you have $%d) [yn]? ", countmoney(lf->pack));
		} else {
			mvwprintw(mainwin, y, 0, "You cannot afford to pay $%d for absolution.", cost); y+= 2;
			possible = B_FALSE;
		}
	}

	if (!possible) {
		mvwprintw(mainwin, y, 0, "[Press any key]");
	}
	ch = getch();
	if (!possible || (ch != 'y')) {
		return SR_BACK;
	}

	givemoney(lf, NULL, cost);
	setpiety(god->race->id, 100);
	msg("\"You sins are forgiven!\""); more();

	return SR_BACK;
}

enum SHOPRETURN shopbless(lifeform_t *lf, object_t *vm, int starty, char *toptext, int *ndonated) {
	object_t *o;
	char ch,buf[BUFLEN];
	int y;
	int remcursecost, blesscost,surcharge;
	y = starty;

	remcursecost = applyshoppricemod(DEF_REMCURSECOST, lf, vm, SA_BUY);
	blesscost = applyshoppricemod(DEF_BLESSCOST, lf, vm, SA_BUY);
	surcharge = applyshoppricemod(DEF_SURCHARGE, lf, vm, SA_BUY);

	if (isalignedtemple(vm)) {
		blesscost /= 2; limit(&blesscost, 1, NA);
		remcursecost = 0;
		surcharge = 0;
	}


	mvwprintw(mainwin, y, 0, "So long as their aura is known, we can bestow a blessing on most items."); y += 2;
	if (remcursecost == 0) {
		mvwprintw(mainwin, y, 0, "Curse removal -      FREE",remcursecost); y++;
	} else {
		mvwprintw(mainwin, y, 0, "Curse removal -      $%d each",remcursecost); y++;
	}
	mvwprintw(mainwin, y, 0, "Blessings     -      $%d each",blesscost); y += 2;
	if (surcharge != 0) {
		mvwprintw(mainwin, y, 0, "(there is a $%d surcharge for uncursing an equipped item)",surcharge); y += 2;
	}
	mvwprintw(mainwin, y, 0, "Pay for a blessing (you have $%d) [yn]? ", countmoney(lf->pack));

	ch = getch();
	if (ch != 'y') {
		return SR_BACK;
	}

	// ask which object
	snprintf(buf, BUFLEN, "Bless which object (you have $%d)?", countmoney(lf->pack));
	initprompt(&prompt, buf);
	for (o = player->pack->first ; o ; o = o->next) {
		int ok = B_FALSE;
		if (o->blessknown && (o->blessed != B_BLESSED) && !hasflag(o->flags, F_NOBLESS)) {
			ok = B_TRUE;
		} else if (!o->blessknown && !hasflag(o->flags, F_NOBLESS)) {
			ok = B_TRUE;
		}
		if (ok) {
			char costbuf[BUFLEN];
			getobname(o, buf, o->amt);
			snprintf(costbuf, BUFLEN, "%-60s($%d)", buf, getshopblessprice(o, vm));
			addchoice(&prompt, o->letter, costbuf, costbuf, o, NULL);
		}
	}
	addchoice(&prompt, '-', "(nothing)", NULL, NULL, NULL);
	ch = getchoice(&prompt);

	o = (object_t *)prompt.result;
	if (o) {
		int cost;
		cost = getshopblessprice(o, vm);
		if (countmoney(player->pack) < cost) {
			msg("You cannot afford the $%d blessing price.", cost);
			more();
		} else {
			msg("You hand over $%d to the priest.", cost); more();
			givemoney(player, NULL, cost);
			// already blessed?
			msg("The priest raise his hands in supplication."); more();
			if (isblessed(o)) {
				msg("\"Hey, this item is already blessed!\""); more();
				o->blessknown = B_TRUE;
				// chance to get your money back.
				if (skillcheck(player, SC_SPEECH, 100, 0)) {
					char goldbuf[BUFLEN];
					msg("\"...so I will return your payment.\""); more();
					snprintf(goldbuf, BUFLEN, "%d gold dollars", cost);
					addob(player->pack, goldbuf);
				} else {
					msg("\"Unfortunately, we do not offer refunds.\""); more();
				}
			} else {
				blessob(o);
			}
			more();
		}
	}

	return SR_CONTINUE;
}

enum SHOPRETURN shopid(lifeform_t *lf, object_t *vm, int starty, char *toptext, int *nid) {
	flag_t *sellflag[MAXCANDIDATES];
	char buf[BUFLEN],obname[BUFLEN];
	int nsellflags;
	object_t *o;
	int y,ch,i;
	int cost = DEF_IDCOST;
	y = starty;

	cost = applyshoppricemod(DEF_IDCOST,lf, vm, SA_ID);

	*nid = 0;

	mvwprintw(mainwin, y, 0, "We can help inspect your items for a small fee."); y += 2;
	mvwprintw(mainwin, y, 0, "For just $%d per item we can reveal their general purpose,", cost); y++;
	mvwprintw(mainwin, y, 0, "however please note that we are unable to detect magical"); y++;
	mvwprintw(mainwin, y, 0, "enchantments or blessings.", cost); y += 2;
	mvwprintw(mainwin, y, 0, "Identify items [y/n]? ", countmoney(lf->pack));

	ch = getch();
	if (ch != 'y') {
		return SR_BACK;
	}

	getflags(vm->flags, sellflag, &nsellflags, F_SHOPACCEPTSFLAG, F_NONE);

	// ask what to sell
	snprintf(buf, BUFLEN, "What would you like to inspect (you have $%d)?", countmoney(lf->pack));

	initprompt(&prompt, buf);
	prompt.maycancel = B_TRUE;
	for (o = player->pack->first ; o ; o = o->next) {
		int ok = B_FALSE;
		for (i = 0; i < nsellflags; i++) {
			if (obmatchessellflag(o, sellflag[i], SA_ID)) {
				if (!isknown(o)) {
					ok = B_TRUE;
					break;
				}
			}
		}

		if (ok) {
			char costbuf[BUFLEN];
			getobname(o, buf, o->amt);
			snprintf(costbuf, BUFLEN, "%-60s($%d)", buf, cost);
			addchoice(&prompt, o->letter, costbuf, costbuf, o, NULL);
		}
	}
	addchoice(&prompt, '-', "(nothing)", NULL, NULL, NULL);
	ch = getchoice(&prompt);
	o = (object_t *)prompt.result;

	if (!o) {
		return SR_BACK;
	}


	// confirm
	getobname(o, obname, o->amt);
	if (countmoney(player->pack) < cost) {
		msg("You cannot afford the $%d inspection fee.", cost);
		more();
	} else {
		// pay.
		msg("You hand over $%d.", cost); more();
		givemoney(player, NULL, cost);
		// id it.
		makeknown(o->type->id);
		// get name again
		getobname(o, obname, o->amt);
		// tell the player
		msg("\"%s %s.\"",(o->amt == 1) ? "That is" : "Those are", obname);
		more();
	}
	return SR_CONTINUE;
}

// returns F_OPENHOURS flag if the shop is closed.
flag_t *shopisclosed(object_t *shop) {
	flag_t *f;
	f = hasflag(shop->flags, F_OPENHOURS);
	if (f) {
		int h = -1,m = -1,s = -1;
		splittime(&h, &m, &s);
		if (!timeisbetween(h, f->val[0], f->val[1])) {
			return f;
		}
	}
	return NULL;
}

enum SHOPRETURN shopmiracle(lifeform_t *lf, object_t *vm, int starty, char *toptext, int *ndonated) {
	char ch;
	int y;
	int piety,cost = 0,possible = B_TRUE;
	flag_t *f;
	lifeform_t *god = NULL;
	y = starty;


	// get linked god
	f = hasflag(vm->flags, F_LINKGOD);
	god = findgod(f->val[0]);
	
	piety = getpiety(god->race->id);
	cost = 1000 - piety;

	cost = applyshoppricemod(cost,lf, vm, SA_BUY);

	if (godisangry(god->race->id)) {
		mvwprintw(mainwin, y, 0, "%s does not currently find you worthy of miracles.", god->race->name);
		y += 2;
		possible = B_FALSE;
	} else {
		mvwprintw(mainwin, y, 0, "For $%d, we will ask %s to intervene on your behalf.", cost, god->race->name);
		y += 2;
	}


	if (possible) {
		if (countmoney(lf->pack) >= cost) {
			mvwprintw(mainwin, y, 0, "Pay for a miracle (you have $%d) [yn]? ", countmoney(lf->pack));
		} else {
			mvwprintw(mainwin, y, 0, "You cannot afford to pay $%d.", cost); y+= 2;
			possible = B_FALSE;
		}
	}

	if (!possible) {
		mvwprintw(mainwin, y, 0, "[Press any key]");
	}
	ch = getch();
	if (!possible || (ch != 'y')) {
		return SR_BACK;
	}

	givemoney(lf, NULL, cost);
		
	godgiftmaybe(god->race->id, B_TRUE, B_TRUE);
	more();

	return SR_BACK;
}

// returns B_TRUE if shop transaction should end
enum SHOPRETURN shoppurchase(lifeform_t *lf, object_t *vm, int starty, char *toptext, int *npurchased) {
	object_t *o;
	int y;
	char buf[BUFLEN], buf2[BUFLEN], choices[BUFLENSMALL];
	char ch;
	static enum {
		BUY,
		EXAMINE
	} shopmode = BUY;
	y = starty;
	// list objects for sale
	for (o = vm->contents->first ; o ; o = o->next) {
		char obname[BUFLEN];
		int thisprice;
		enum COLOUR col;

		getshopobname(o, obname, o->amt);
		thisprice = (int)getshopprice(o, player, vm);

		snprintf(buf, BUFLEN, "%c - %s", o->letter, obname);
		if (shopmode == BUY) {
			if (canafford(player, thisprice)) {
				col = C_GREY;
			} else {
				col = C_RED;
			}
		} else {
			col = C_GREY;
		}
		snprintf(buf2, BUFLEN, "^%d%-60s$%d", col, buf, thisprice);
		wmove(mainwin, y, 0);
		textwithcol(mainwin, buf2);
		y++;
	}

	strcpy(choices, "");
	y++;

	wmove(mainwin, y, 0);
	textwithcol(mainwin, "^n");
	mvwprintw(mainwin, y, 0, "You have $%d.", countmoney(player->pack));
	y++;
	y++;
	
	// ask what to do
	mvwprintw(mainwin, y, 0, "What will you %s (ESC=done, ?=toggle action)? ", (shopmode == BUY) ? "buy" : "examine");

	ch = getch();
	if (ch == 27) {
		strcpy(toptext, "");
		return SR_BACK;
	} else if (ch == '?') {
		if (shopmode == BUY) {
			shopmode = EXAMINE;
		} else {
			shopmode = BUY;
		}
	} else {
		// try to find that object...
		o = hasobletter(vm->contents, ch);
		if (o) {
			if (shopmode == EXAMINE) {
				describeob(o);
			} else {
				enum SKILLLEVEL slev;
				char obname[BUFLEN],validchars[BUFLENSMALL];
				char answer;
				int value;

				value = (int)getshopprice(o, player, vm); 
				slev = getskill(player, SK_THIEVERY);

				// confirm
				getshopobname(o, obname, o->amt);
				snprintf(buf, BUFLEN, "Buy%s %s for $%d?", slev ? "/steal" : "", obname, value);
				strcpy(validchars, "yn");
				if (slev) {
					strcat(validchars, "s");
				}
				answer = askchar(buf, validchars,"n", B_TRUE, B_FALSE);
				if (answer == 'y') {
					char ques[BUFLEN];
					object_t *oo;

					// do you have enough money (or a credit card)?
					if (canafford(player, value)) {
						object_t *money = NULL;
						enum SKILLLEVEL slev;
						slev = getskill(lf, SK_SPEECH);
						// determine payment method
						snprintf(ques, BUFLEN, "How will you pay for %s ($%d)?", obname, value);
						initprompt(&prompt, ques);
						for (oo = player->pack->first ; oo ; oo = oo->next) {
							if ((oo->type->id == OT_GOLD) || (oo->type->id == OT_CREDITCARD) || hasflag(oo->flags, F_GEM)) {
								char moneyname[BUFLEN];
								char fullname[BUFLEN];
								int valid = B_FALSE;
							
								getobname(oo, moneyname, oo->amt);

								if (oo->type->id == OT_GOLD) {
									// only list gold if you have enough
									if (getobvalue(oo) >= value) valid = B_TRUE;
									strcpy(fullname, moneyname);
								} else if  (hasflag(oo->flags, F_GEM)) {
									// gems are only valid if our psychology skill is high
									// enough to convince the shopkeeper to accept them.
									if (slev >= PR_BEGINNER) {
										int thisval;
										thisval = applyshoppricemod(getobvalue(oo), player, vm, SA_SELL);
										if (thisval >= value) {
											valid = B_TRUE;
											snprintf(fullname, BUFLEN, "%s (worth $%d)", moneyname, thisval);
										}
									}
								} else {
									// always list anything else (credit cards)
									valid = B_TRUE;
									strcpy(fullname, moneyname);
								}

								if (valid) {
									addchoice(&prompt, oo->letter, fullname, fullname, oo, NULL);
								}
							}
						}
						money = NULL;
						if (prompt.nchoices == 1) {
							// only one possibility.
							// is it gold?
							money = (object_t *)prompt.choice[0].data;
							if (money->type->id !=  OT_GOLD) {
								// if not gold, still confirm it.
								money = NULL;
							}
						} 
						if (!money) {
							addchoice(&prompt, '-', "(cancel)", "(cancel)", NULL, NULL);
							prompt.maycancel = B_TRUE;
							getchoice(&prompt);
							money = (object_t *)prompt.result;
						}
						if (money) {
							int buyit = B_FALSE;
							char buytext[BUFLEN];
							enum {
								PM_GOLD,
								PM_GEM,
								PM_CARD,
							} purchasemethod;
							if (money->type->id == OT_CREDITCARD) {
								purchasemethod = PM_CARD;
								if (getcharges(money) >= value) {
									// you got it!
									buyit = B_TRUE;
									usecharges(money, value);
									strcpy(buytext, "Charged to card");
									if (npurchased) (*npurchased)++;
								} else {
									// maxed!
									usecharges(money, getcharges(o)); // use up all remaining charges
									// get kicked out
									msg("^B\"Trying to use a maxed out card, eh? Get out of here, thief!\""); more();
									// shop closes
									addflag(vm->flags, F_BANNEDLF, player->id, NA, NA, NULL);
									return SR_QUIT;
								}
							} else { // ie gold or gem;
								if (getobvalue(money) >= value) {
									buyit = B_TRUE;
									//	lose money (do this first to avoid potential weight issues)
									if (hasflag(money->flags, F_GEM)) {
										int gemsneeded;
										char gemname[BUFLEN];
										int valpergem,amtpaid = 0, change = 0;
										valpergem = applyshoppricemod(real_getobvalue(money, 1), player, vm, SA_SELL);
										gemsneeded = value / valpergem;
										limit(&gemsneeded, 1, NA); // (in case gem is worth more than object)
										getobname(money, gemname, gemsneeded);
										//  calculate how much change to give...
										amtpaid = gemsneeded * valpergem;
										change = amtpaid - value;

										// remove enough gems to pay...
										removeob(money, gemsneeded);
										purchasemethod = PM_GEM;

										// announce that we're using a gem
										// also determine whether the player get change
										if (slev >= PR_ADEPT) {
											msg("You hand over %s%s.", gemname, 
												(change > 0) ? " and ask for change." : ""); 
											more();
											if (change > 0) {
												char changebuf[BUFLEN];
									
												snprintf(changebuf, BUFLEN, "%d gold dollars", change);
												addob(player->pack, changebuf);
												msg("You receive $%d change.", change); more();
											}
										
										} else {
											msg("You hand over %s.", gemname); more();
										}
									} else {
										givemoney(player, NULL, value);
										purchasemethod = PM_GOLD;
									}
									strcpy(buytext, "Purchased");
									if (npurchased) (*npurchased)++;
								} else {
									msg("\"I'm afraid that won't cover it...\""); more();
									o = NULL;
								}
							}
							if (buyit) {
								int shopamt;
								// clear o->letter
								o->letter = '\0';
								//	give object
								shopamt = o->amt; // avoid "purchased: 2 apples" when you only bought 1 but were holding 1
								o = moveob(o, player->pack, ALL);
								identify(o);
								getobname(o, obname, shopamt);
								snprintf(toptext, BUFLEN, "%s: %c - %s", buytext, o->letter, obname);
								if (npurchased) (*npurchased)++;
								if (purchasemethod == PM_CARD) {
									// god of thieves likes credit cards...
									pleasegodmaybe(R_GODTHIEVES, (value/75));
									more(); // in case there was an effect
								} else {
									practice(player, SK_SPEECH, 1);
								}
							}
						} else {
							msg("Cancelled."); more();
							o = NULL;
						} // end if money
					} else {
						msg("You can't afford that!"); more();
						o = NULL;
					}
				} else if (answer == 's') { // steal
					// skillcheck - difficulty based on total value of objects here
					if (skillcheck(player, SC_STEAL, 75+(value/10), 0)) {
						int shopamt;
						// success
						o->letter = '\0';
						shopamt = o->amt; // avoid "stolen: 2 apples" when you only bought 1 but were holding 1
						o = moveob(o, player->pack, ALL);
						identify(o);
						getobname(o, obname, shopamt);
						snprintf(toptext, BUFLEN, "Stolen: %c - %s", o->letter, obname);

						practice(player, SK_THIEVERY, 1);
						pleasegodmaybe(R_GODTHIEVES, (value/50));
						more(); // in case there was an effect
						o = NULL;
					} else {
						msg("^B\"HEY! Get out of my shop, thief!\""); more();
						// shop closes
						addflag(vm->flags, F_BANNEDLF, player->id, NA, NA, NULL);
						return SR_QUIT;
					}
				} else {
					// cancelled
					strcpy(toptext, "");
				}
			} // end if shopmode == ...
		} else {
			snprintf(toptext, BUFLEN, "No such item.");
		} // end if o
	} // end if ch
	return SR_CONTINUE;
}

enum SHOPRETURN shoprepair(lifeform_t *lf, object_t *vm, int starty, char *toptext, int *ndonated) {
	object_t *o;
	char ch,buf[BUFLEN];
	int y,hpcost;
	char obname[BUFLEN];
	flag_t *f;
	y = starty;

	hpcost = DEF_REPAIRCOSTPERHP;


	// get list of objects to repair
	snprintf(buf, BUFLEN, "Repair which object (you have $%d)?", countmoney(lf->pack));
	initprompt(&prompt, buf);
	for (o = player->pack->first ; o ; o = o->next) {
		if (isarmour(o) && isdamaged(o)) {
			char desc[BUFLEN];
			int thiscost;
		
			// determine cost...
			f = hasflag(o->flags, F_OBHP);
			thiscost = applyshoppricemod((f->val[1] - f->val[0]) * hpcost, lf, vm, SA_BUY);
			// add to prompt
			getobname(o, obname, o->amt);
			snprintf(desc, BUFLEN, "%s ($%d)", obname,thiscost);
			addchoice(&prompt, o->letter, desc, desc, o, NULL);
		}
	}
	addchoice(&prompt, '-', "(nothing)", NULL, NULL, NULL);


	mvwprintw(mainwin, y, 0, "We offer repair services for most kinds armour."); y+=2;
	if (prompt.nchoices == 1) {
		mvwprintw(mainwin, y, 0, "You have no armour in need of repair."); y += 2;
		mvwprintw(mainwin, y, 0, "[Press any key]");
	} else {
		mvwprintw(mainwin, y, 0, "Pay to repair your armour (you have $%d) [yn]? ", countmoney(lf->pack));
	}

	ch = getch();
	if ((prompt.nchoices == 1) || (ch != 'y')) {
		return SR_BACK;
	}


	// ask which object
	ch = getchoice(&prompt);

	o = (object_t *)prompt.result;
	if (o) {
		int thiscost;
		// determine cost...
		f = hasflag(o->flags, F_OBHP);
		thiscost = applyshoppricemod((f->val[1] - f->val[0]) * hpcost, lf, vm, SA_BUY);
		if (thiscost > countmoney(player->pack)) {
			msg("You can't afford to repair that item!"); more();
			return SR_CONTINUE;
		}
		msg("You hand over $%d.", thiscost); more();
		givemoney(player, NULL, thiscost);
		f->val[0] = f->val[1];
		getobname(o, obname, o->amt);
		msg("Your %s %s completely repaired.", obname, (o->amt == 1) ? "is" : "are"); more();
	}

	return SR_CONTINUE;
}

enum SHOPRETURN shopresize(lifeform_t *lf, object_t *vm, int starty, char *toptext, int *ndonated) {
	object_t *o;
	char ch,buf[BUFLEN];
	int y;
	int resizecost;
	y = starty;

	resizecost = applyshoppricemod(pctof(75, DEF_RESIZECOST), lf, vm, SA_BUY);

	mvwprintw(mainwin, y, 0, "For just $%d per item, we can resize weapons or armour to fit you.", resizecost); y ++;
	mvwprintw(mainwin, y, 0, "(item quality will not be affected)"); y += 2;
	if (countmoney(player->pack) < resizecost) {
		mvwprintw(mainwin, y, 0, "Sadly, you cannot afford the resizing fee."); y += 2;
		mvwprintw(mainwin, y, 0, "[Press a key to return]");
		getch();
		return SR_BACK;
	} else {
		mvwprintw(mainwin, y, 0, "Pay to resize an item (you have $%d) [yn]? ", countmoney(lf->pack));
	}

	ch = getch();
	if (ch != 'y') {
		return SR_BACK;
	}

	// ask which object
	snprintf(buf, BUFLEN, "Resize which object (you have $%d)?", countmoney(lf->pack));
	initprompt(&prompt, buf);
	for (o = player->pack->first ; o ; o = o->next) {
		if (hasflag(o->flags, F_MULTISIZE) && !armourfits(player, o, NULL)) {
			char costbuf[BUFLEN];
			getobname(o, buf, o->amt);
			snprintf(costbuf, BUFLEN, "%-60s($%d)", buf, resizecost);
			addchoice(&prompt, o->letter, costbuf, costbuf, o, NULL);
		}
	}
	addchoice(&prompt, '-', "(nothing)", NULL, NULL, NULL);
	ch = getchoice(&prompt);

	o = (object_t *)prompt.result;
	if (o) {
		msg("You hand over $%d.", resizecost); more();
		givemoney(player, NULL, resizecost);
		resizeobject(o, getlfsize(player)); // always go to player's size
		getobname(o, buf, 1);
		msgnocap("%c - %s", o->letter, buf);
		more();
	}

	return SR_CONTINUE;
}

enum SHOPRETURN shoprest(lifeform_t *lf, object_t *vm, int starty, char *toptext, int *ndonated) {
	char ch,obid[BUFLENSMALL],buf[BUFLEN];
	int y,i;
	int cost = 0,possible = B_TRUE, amt;
	y = starty;


	cost = applyshoppricemod(10, lf, vm, SA_BUY);

	mvwprintw(mainwin, y, 0, "We offer good quality rooms for only $%d per hour.", cost);
	y += 2;

	if (countmoney(lf->pack) >= cost) {
		mvwprintw(mainwin, y, 0, "Rent a room (you have $%d) [yn]? ", countmoney(lf->pack));
	} else {
		mvwprintw(mainwin, y, 0, "You cannot afford to pay $%d.", cost); y+= 2;
		possible = B_FALSE;
	}

	if (!possible) {
		mvwprintw(mainwin, y, 0, "[Press any key]");
	}
	ch = getch();
	if (!possible || (ch != 'y')) {
		return SR_BACK;
	}

	// how many hours?
	snprintf(buf, BUFLEN, "How many hours will you pay for (you have $%d)?", countmoney(lf->pack));
	initprompt(&prompt, buf);
	for (i = 1; i <= 9; i++) {
		int thiscost;
		thiscost = cost * i;
		snprintf(buf, BUFLEN, "%d hour%s ($%d)", i, (i == 1) ? "" : "s", thiscost);
		addchoice(&prompt, '0' + i, buf, buf, NULL, NULL);
	}
	addchoice(&prompt, '-', "Cancel", NULL, NULL, NULL);
	ch = getchoice(&prompt);
	if (ch == '-') {
		return SR_BACK;
	}
	amt = ch - '0'; // ie. 1 - 12
	cost *= amt;

	givemoney(lf, NULL, cost);
		
	// mark that we are resting in a hotel
	snprintf(obid, BUFLEN, "%ld", vm->id);
	addflag(lf->flags, F_RESTINGINMOTEL, amt*60, 0, NA, obid);
	addflag(lf->flags, F_RESTUNTILBETTER, B_TRUE, NA, NA, NULL);
	breakaitargets(lf, B_FALSE);
	startresting(lf, B_FALSE);
	more();
	return SR_QUIT;
}

enum SHOPRETURN shopsell(lifeform_t *lf, object_t *vm, int starty, char *toptext, int *nsold) {
	int count = 0;
	flag_t *sellflag[MAXCANDIDATES],*curflag = NULL ;
	char buf[BUFLEN];
	int nsellflags;
	object_t *o;
	int y,ch,i;
	y = starty;

	*nsold = 0;

	mvwprintw(mainwin, y, 0, "We offer good prices for quality items."); y += 2;
	mvwprintw(mainwin, y, 0, "Sell items [y/n]? ", countmoney(lf->pack));

	ch = getch();
	if (ch != 'y') {
		return SR_BACK;
	}

	getflags(vm->flags, sellflag, &nsellflags, F_SHOPACCEPTSFLAG, F_NONE);

	// ask what to sell
	snprintf(buf, BUFLEN, "What will you sell (you have $%d)?", countmoney(lf->pack));

	o = doaskobject(player->pack, buf, NULL, &count, B_TRUE, B_FALSE, B_FALSE, '\0', vm, SA_SELL, NULL, B_FALSE);
	if (!o) {
		return SR_BACK;
	}

	// validate it 
	if (o) {
		object_t *newob;
		char let, paymentbuf[BUFLEN],obname[BUFLEN],buf[BUFLEN];
		int sellprice;

		// get matching sell flag
		curflag = NULL;
		for (i = 0; i < nsellflags; i++) {
			if (obmatchessellflag(o, sellflag[i], SA_SELL)) {
				curflag = sellflag[i];
				break;
			}
		}
		if (!curflag) {
			// you picked something impoassible
			msg("We don't accept that kind of object.");
			more();
			return SR_CONTINUE;
		}

		// can we remove it?
		if (isequipped(o)) {
			if (takeoff(lf, o)) {
				more(); 
				return SR_CONTINUE;
			}
		}
		
		// calculate sale price
		sellprice = applyshoppricemod ( 
				pctof(curflag->val[1], real_getobvalue(o, 1)),
				lf, vm, SA_SELL );
		sellprice *= count;

		// confirm
		getobname(o, obname, count);
		snprintf(buf, BUFLEN, "Sell %s for $%d?", obname, sellprice);
		ch = askchar(buf, "yn","n", B_TRUE, B_FALSE);
		if (ch == 'y') {
			// move object to the shop
			if (vm->contents->first) {
				let = vm->contents->last->letter + 1;
			} else {
				let = 'a';
			}
			newob = moveob(o, vm->contents, count);
			newob->letter = let;
			(*nsold)++;
			// give money to player
			snprintf(paymentbuf, BUFLEN, "%d gold dollars", sellprice);
			addob(player->pack, paymentbuf);

			practice(player, SK_SPEECH, 1);
			msg("Pleasure doing business with you!!"); more();
		}
	} else {
		return SR_BACK;
	}
	return SR_CONTINUE;
}