/*!
 * @file hissatsu.c
 * @brief 剣術の実装 / Blade arts
 * @date 2014/01/17
 * @author
 * Copyright (c) 1997 Ben Harrison, James E. Wilson, Robert A. Koeneke\n
 * This software may be copied and distributed for educational, research,\n
 * and not for profit purposes provided that this copyright and statement\n
 * are included in all such copies.  Other copyrights may also apply.\n
 * 2014 Deskull rearranged comment for Doxygen.\n
 */

#include "system/angband.h"
#include "core/stuff-handler.h"
#include "util/util.h"
#include "main/sound-definitions-table.h"

#include "monster/monster-race-hook.h"
#include "player/player-status.h"
#include "player/player-effects.h"
#include "inventory/player-inventory.h"
#include "spell/technic-info-table.h"
#include "object/item-use-flags.h"

#include "cmd/cmd-basic.h"
#include "cmd-action/cmd-spell.h"
#include "view/display-main-window.h"
#include "spell/spells-util.h"
#include "spell/spells-execution.h"

#define TECHNIC_HISSATSU (REALM_HISSATSU - MIN_TECHNIC)

/*!
 * @brief 使用可能な剣術を選択する /
 * Allow user to choose a blade arts.
 * @param sn 選択した特殊技能ID、キャンセルの場合-1、不正な選択の場合-2を返す
 * @return 発動可能な魔法を選択した場合TRUE、キャンセル処理か不正な選択が行われた場合FALSEを返す。
 * @details
 * If a valid spell is chosen, saves it in '*sn' and returns TRUE\n
 * If the user hits escape, returns FALSE, and set '*sn' to -1\n
 * If there are no legal choices, returns FALSE, and sets '*sn' to -2\n
 *\n
 * The "prompt" should be "cast", "recite", or "study"\n
 * The "known" should be TRUE for cast/pray, FALSE for study\n
 *\n
 * nb: This function has a (trivial) display bug which will be obvious\n
 * when you run it. It's probably easy to fix but I haven't tried,\n
 * sorry.\n
 */
static int get_hissatsu_power(player_type *creature_ptr, SPELL_IDX *sn)
{
	SPELL_IDX i;
	int j = 0;
	int num = 0;
	POSITION y = 1;
	POSITION x = 15;
	PLAYER_LEVEL plev = creature_ptr->lev;
	int ask = TRUE;
	char choice;
	char out_val[160];
	SPELL_IDX sentaku[32];
	concptr p = _("必殺剣", "special attack");
	COMMAND_CODE code;
	magic_type spell;
	bool flag, redraw;
	int menu_line = (use_menu ? 1 : 0);

	/* Assume cancelled */
	*sn = (-1);

	/* Get the spell, if available */
	if (repeat_pull(&code))
	{
		*sn = (SPELL_IDX)code;
		/* Verify the spell */
		if (technic_info[TECHNIC_HISSATSU][*sn].slevel <= plev)
		{
			/* Success */
			return TRUE;
		}
	}

	flag = FALSE;
	redraw = FALSE;

	for (i = 0; i < 32; i++)
	{
		if (technic_info[TECHNIC_HISSATSU][i].slevel <= PY_MAX_LEVEL)
		{
			sentaku[num] = i;
			num++;
		}
	}

	/* Build a prompt (accept all spells) */
	(void)strnfmt(out_val, 78,
		_("(%^s %c-%c, '*'で一覧, ESC) どの%sを使いますか？", "(%^ss %c-%c, *=List, ESC=exit) Use which %s? "),
		p, I2A(0), "abcdefghijklmnopqrstuvwxyz012345"[num - 1], p);

	if (use_menu) screen_save();
	choice = always_show_list ? ESCAPE : 1;

	while (!flag)
	{
		if(choice==ESCAPE) choice = ' '; 
		else if( !get_com(out_val, &choice, FALSE) )break;

		if (use_menu && choice != ' ')
		{
			switch(choice)
			{
				case '0':
				{
					screen_load();
					return FALSE;
				}

				case '8':
				case 'k':
				case 'K':
				{
					do
					{
						menu_line += 31;
						if (menu_line > 32) menu_line -= 32;
					} while(!(creature_ptr->spell_learned1 & (1L << (menu_line-1))));
					break;
				}

				case '2':
				case 'j':
				case 'J':
				{
					do
					{
						menu_line++;
						if (menu_line > 32) menu_line -= 32;
					} while(!(creature_ptr->spell_learned1 & (1L << (menu_line-1))));
					break;
				}

				case '4':
				case 'h':
				case 'H':
				case '6':
				case 'l':
				case 'L':
				{
					bool reverse = FALSE;
					if ((choice == '4') || (choice == 'h') || (choice == 'H')) reverse = TRUE;
					if (menu_line > 16)
					{
						menu_line -= 16;
						reverse = TRUE;
					}
					else menu_line+=16;
					while(!(creature_ptr->spell_learned1 & (1L << (menu_line-1))))
					{
						if (reverse)
						{
							menu_line--;
							if (menu_line < 2) reverse = FALSE;
						}
						else
						{
							menu_line++;
							if (menu_line > 31) reverse = TRUE;
						}
					}
					break;
				}

				case 'x':
				case 'X':
				case '\r':
				case '\n':
				{
					i = menu_line - 1;
					ask = FALSE;
					break;
				}
			}
		}
		/* Request redraw */
		if ((choice == ' ') || (choice == '*') || (choice == '?') || (use_menu && ask))
		{
			/* Show the list */
			if (!redraw || use_menu)
			{
				char psi_desc[80];
				int line;
				redraw = TRUE;
				if (!use_menu) screen_save();

				/* Display a list of spells */
				prt("", y, x);
				put_str(_("名前              Lv  MP      名前              Lv  MP ", 
						  "name              Lv  SP      name              Lv  SP "), y, x + 5);
				prt("", y+1, x);
				/* Dump the spells */
				for (i = 0, line = 0; i < 32; i++)
				{
					spell = technic_info[TECHNIC_HISSATSU][i];

					if (spell.slevel > PY_MAX_LEVEL) continue;
					line++;
					if (!(creature_ptr->spell_learned1 >> i)) break;

					/* Access the spell */
					if (spell.slevel > plev)   continue;
					if (!(creature_ptr->spell_learned1 & (1L << i))) continue;
					if (use_menu)
					{
						if (i == (menu_line-1))
							strcpy(psi_desc, _("  》", "  > "));
						else strcpy(psi_desc, "    ");
						
					}
					else
					{
						char letter;
						if (line <= 26)
							letter = I2A(line-1);
						else
							letter = '0' + line - 27;
						sprintf(psi_desc, "  %c)",letter);
					}

					/* Dump the spell --(-- */
					strcat(psi_desc, format(" %-18s%2d %3d",
						exe_spell(creature_ptr, REALM_HISSATSU, i, SPELL_NAME),
						spell.slevel, spell.smana));
					prt(psi_desc, y + (line%17) + (line >= 17), x+(line/17)*30);
					prt("", y + (line%17) + (line >= 17) + 1, x+(line/17)*30);
				}
			}

			/* Hide the list */
			else
			{
				/* Hide list */
				redraw = FALSE;
				screen_load();
			}

			/* Redo asking */
			continue;
		}

		if (!use_menu)
		{
			if (isalpha(choice))
			{
				/* Note verify */
				ask = (isupper(choice));

				/* Lowercase */
				if (ask) choice = (char)tolower(choice);

				/* Extract request */
				i = (islower(choice) ? A2I(choice) : -1);
			}
			else
			{
				ask = FALSE; /* Can't uppercase digits */

				i = choice - '0' + 26;
			}
		}

		/* Totally Illegal */
		if ((i < 0) || (i >= 32) || !(creature_ptr->spell_learned1 & (1 << sentaku[i])))
		{
			bell();
			continue;
		}

		j = sentaku[i];

		/* Verify it */
		if (ask)
		{
			char tmp_val[160];

			/* Prompt */
			(void) strnfmt(tmp_val, 78, _("%sを使いますか？", "Use %s? "), exe_spell(creature_ptr, REALM_HISSATSU, j, SPELL_NAME));

			/* Belay that order */
			if (!get_check(tmp_val)) continue;
		}

		/* Stop the loop */
		flag = TRUE;
	}
	if (redraw) screen_load();

	creature_ptr->window |= (PW_SPELL);
	handle_stuff(creature_ptr);

	/* Abort if needed */
	if (!flag) return FALSE;

	/* Save the choice */
	(*sn) = j;

	repeat_push((COMMAND_CODE)j);

	/* Success */
	return TRUE;
}


/*!
 * @brief 剣術コマンドのメインルーチン
 * @return なし
 */
void do_cmd_hissatsu(player_type *creature_ptr)
{
	SPELL_IDX       n = 0;
	magic_type      spell;

	if (cmd_limit_confused(creature_ptr)) return;
	if (!has_melee_weapon(creature_ptr, INVEN_RARM) && !has_melee_weapon(creature_ptr, INVEN_LARM))
	{
		if (flush_failure) flush();
		msg_print(_("武器を持たないと必殺技は使えない！", "You need to wield a weapon!"));
		return;
	}
	if (!creature_ptr->spell_learned1)
	{
		msg_print(_("何も技を知らない。", "You don't know any special attacks."));
		return;
	}

	if (creature_ptr->special_defense & KATA_MASK)
	{
		set_action(creature_ptr, ACTION_NONE);
	}

	if (!get_hissatsu_power(creature_ptr, &n)) return;

	spell = technic_info[TECHNIC_HISSATSU][n];

	/* Verify "dangerous" spells */
	if (spell.smana > creature_ptr->csp)
	{
		if (flush_failure) flush();
		/* Warning */
		msg_print(_("ＭＰが足りません。", "You do not have enough mana to use this power."));
		msg_print(NULL);
		return;
	}

	sound(SOUND_ZAP);

	if (!exe_spell(creature_ptr, REALM_HISSATSU, n, SPELL_CAST)) return;

	take_turn(creature_ptr, 100);

	/* Use some mana */
	creature_ptr->csp -= spell.smana;

	/* Limit */
	if (creature_ptr->csp < 0) creature_ptr->csp = 0;
	creature_ptr->redraw |= (PR_MANA);
	creature_ptr->window |= (PW_PLAYER | PW_SPELL);
}


/*!
 * @brief 剣術コマンドの学習
 * @return なし
 */
void do_cmd_gain_hissatsu(player_type *creature_ptr)
{
	OBJECT_IDX item;
	int i, j;

	object_type *o_ptr;
	concptr q, s;

	bool gain = FALSE;

	if (creature_ptr->special_defense & (KATA_MUSOU | KATA_KOUKIJIN))
	{
		set_action(creature_ptr, ACTION_NONE);
	}

	if (cmd_limit_blind(creature_ptr)) return;
	if (cmd_limit_confused(creature_ptr)) return;

	if (!(creature_ptr->new_spells))
	{
		msg_print(_("新しい必殺技を覚えることはできない！", "You cannot learn any new special attacks!"));
		return;
	}

#ifdef JP
	msg_format("あと %d 種の必殺技を学べる。", creature_ptr->new_spells);
#else
	msg_format("You can learn %d new special attack%s.", creature_ptr->new_spells, (creature_ptr->new_spells == 1?"":"s"));
#endif

	q = _("どの書から学びますか? ", "Study which book? ");
	s = _("読める書がない。", "You have no books that you can read.");

	o_ptr = choose_object(creature_ptr, &item, q, s, (USE_INVEN | USE_FLOOR), TV_HISSATSU_BOOK);
	if (!o_ptr) return;

	for (i = o_ptr->sval * 8; i < o_ptr->sval * 8 + 8; i++)
	{
		if (creature_ptr->spell_learned1 & (1L << i)) continue;
		if (technic_info[TECHNIC_HISSATSU][i].slevel > creature_ptr->lev) continue;

		creature_ptr->spell_learned1 |= (1L << i);
		creature_ptr->spell_worked1 |= (1L << i);
		msg_format(_("%sの技を覚えた。", "You have learned the special attack of %s."), exe_spell(creature_ptr, REALM_HISSATSU, i, SPELL_NAME));
		for (j = 0; j < 64; j++)
		{
			/* Stop at the first empty space */
			if (creature_ptr->spell_order[j] == 99) break;
		}
		creature_ptr->spell_order[j] = i;
		gain = TRUE;
	}

	if (!gain)
	{
		msg_print(_("何も覚えられなかった。", "You were not able to learn any special attacks."));
	}
	else
	{
		take_turn(creature_ptr, 100);
	}

	creature_ptr->update |= (PU_SPELLS);
}


