//Copyright Paul Reiche, Fred Ford. 1992-2002

/*
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "pickship.h"

#include "build.h"
#include "colors.h"
#include "controls.h"
#include "menustat.h"
#include "supermelee/pickmele.h"
#include "encount.h"
#include "battle.h"
#include "races.h"
#include "resinst.h"
#include "nameref.h"
#include "settings.h"
#include "setup.h"
#include "sounds.h"
#include "libs/mathlib.h"


#define NUM_PICK_SHIP_ROWS 2
#define NUM_PICK_SHIP_COLUMNS 6

#define ICON_WIDTH 16
#define ICON_HEIGHT 16

#define FLAGSHIP_X_OFFS 65
#define FLAGSHIP_Y_OFFS 4
#define FLAGSHIP_WIDTH 22
#define FLAGSHIP_HEIGHT 48

static BOOLEAN
DoPickBattleShip (MENU_STATE *pMS)
{
	if (GLOBAL (CurrentActivity) & CHECK_ABORT)
	{
		pMS->CurFrame = 0;
		return (FALSE);
	}

	SetMenuSounds (MENU_SOUND_NONE, MENU_SOUND_NONE);
	
	if (!pMS->Initialized)
	{
		pMS->Initialized = TRUE;
		pMS->InputFunc = DoPickBattleShip;

		LockMutex (GraphicsLock);

		goto ChangeSelection;
	}
	else if (PulsedInputState.menu[KEY_MENU_SELECT])
	{
		if ((HSTARSHIP)pMS->CurFrame)
		{
			PlayMenuSound (MENU_SOUND_SUCCESS);
			return (FALSE);
		}
	}
	else
	{
		COORD new_row, new_col;
		int dx = 0, dy = 0;
		if (PulsedInputState.menu[KEY_MENU_RIGHT]) dx = 1;
		if (PulsedInputState.menu[KEY_MENU_LEFT]) dx = -1;
		if (PulsedInputState.menu[KEY_MENU_UP]) dy = -1;
		if (PulsedInputState.menu[KEY_MENU_DOWN]) dy = 1;

		new_col = pMS->first_item.x + dx;
		new_row = pMS->first_item.y + dy;
		if (new_row != pMS->first_item.y
				|| new_col != pMS->first_item.x)
		{
			RECT r;
			TEXT t;
			COUNT crew_level, max_crew;
			COUNT ship_index;
			HSTARSHIP hBattleShip, hNextShip;
			STARSHIP *StarShipPtr;

			if (new_col < 0)
				new_col = NUM_PICK_SHIP_COLUMNS;
			else if (new_col > NUM_PICK_SHIP_COLUMNS)
				new_col = 0;

			if (new_row < 0)
				new_row = NUM_PICK_SHIP_ROWS - 1;
			else if (new_row == NUM_PICK_SHIP_ROWS)
				new_row = 0;

			PlayMenuSound (MENU_SOUND_MOVE);

			LockMutex (GraphicsLock);

#ifdef NEVER
			SetContextForeGroundColor (
					BUILD_COLOR (MAKE_RGB15 (0x0A, 0x0A, 0x0A), 0x1D));
			DrawRectangle (&pMS->flash_rect0);
#endif /* NEVER */
			pMS->first_item.y = new_row;
			pMS->first_item.x = new_col;

ChangeSelection:
			if (pMS->first_item.x == (NUM_PICK_SHIP_COLUMNS >> 1))
			{
				pMS->flash_rect0.corner.x =
						pMS->flash_rect1.corner.x - 2 + FLAGSHIP_X_OFFS;
				pMS->flash_rect0.corner.y =
						pMS->flash_rect1.corner.y - 2 + FLAGSHIP_Y_OFFS;
				pMS->flash_rect0.extent.width = FLAGSHIP_WIDTH + 4;
				pMS->flash_rect0.extent.height = FLAGSHIP_HEIGHT + 4;

				hBattleShip = GetTailLink (&race_q[0]); /* Flagship */
			}
			else
			{
				new_col = pMS->first_item.x;
				pMS->flash_rect0.corner.x = 5 + pMS->flash_rect1.corner.x - 2
						+ ((ICON_WIDTH + 4) * new_col);
				if (new_col > (NUM_PICK_SHIP_COLUMNS >> 1))
				{
					--new_col;
					pMS->flash_rect0.corner.x += FLAGSHIP_WIDTH - ICON_WIDTH;
				}
				pMS->flash_rect0.corner.y = 16 + pMS->flash_rect1.corner.y - 2
						+ ((ICON_HEIGHT + 4) * pMS->first_item.y);
				pMS->flash_rect0.extent.width = ICON_WIDTH + 4;
				pMS->flash_rect0.extent.height = ICON_HEIGHT + 4;

				ship_index = (pMS->first_item.y * NUM_PICK_SHIP_COLUMNS)
						+ new_col;

				for (hBattleShip = GetHeadLink (&race_q[0]);
						hBattleShip != GetTailLink (&race_q[0]);
						hBattleShip = hNextShip)
				{
					StarShipPtr = LockStarShip (&race_q[0], hBattleShip);
					if (StarShipPtr->index == ship_index
							&& (StarShipPtr->SpeciesID != NO_ID))
					{
						UnlockStarShip (&race_q[0], hBattleShip);
						break;
					}

					hNextShip = _GetSuccLink (StarShipPtr);
					UnlockStarShip (&race_q[0], hBattleShip);
				}

				if (hBattleShip == GetTailLink (&race_q[0]))
					hBattleShip = 0;
			}

			pMS->CurFrame = (FRAME)hBattleShip;

			SetContextForeGroundColor (BLACK_COLOR);
			r.corner.x = pMS->flash_rect1.corner.x + 6;
			r.corner.y = pMS->flash_rect1.corner.y + 5;
			r.extent.width = ((ICON_WIDTH + 4) * 3) - 4;
			r.extent.height = 7;
			DrawFilledRectangle (&r);

			if (hBattleShip == 0)
			{
				crew_level = 0;
				max_crew = 0;
						// Satisfy compiler.
			}
			else
			{
				SetContextFont (TinyFont);

				t.baseline.x = r.corner.x + (r.extent.width >> 1);
				t.baseline.y = r.corner.y + (r.extent.height - 1);
				t.align = ALIGN_CENTER;

				StarShipPtr = LockStarShip (&race_q[0], hBattleShip);
				if (StarShipPtr->captains_name_index == 0)
				{
					t.pStr = GLOBAL_SIS (CommanderName);
					t.CharCount = (COUNT)~0;
					crew_level = GLOBAL_SIS (CrewEnlisted);
					max_crew = GetCrewPodCapacity ();
				}
				else
				{
					STRING locString;

					locString = SetAbsStringTableIndex (
							StarShipPtr->race_strings,
							StarShipPtr->captains_name_index);
					t.pStr = (UNICODE *)GetStringAddress (locString);
					t.CharCount = GetStringLength (locString);
					crew_level = StarShipPtr->crew_level;
					max_crew = StarShipPtr->max_crew;
				}
				UnlockStarShip (&race_q[0], hBattleShip);

				SetContextForeGroundColor (
						BUILD_COLOR (MAKE_RGB15 (0x14, 0x0A, 0x00), 0x0C));
				font_DrawText (&t);
				SetContextForeGroundColor (BLACK_COLOR);
			}

			r.corner.x += (ICON_WIDTH + 4)
					* ((NUM_PICK_SHIP_COLUMNS >> 1) + 1)
					+ FLAGSHIP_WIDTH - ICON_WIDTH;
			DrawFilledRectangle (&r);

			if (crew_level)
			{
				char buf[80];

				t.baseline.x = r.corner.x + (r.extent.width >> 1);
				t.pStr = buf;
				t.CharCount = (COUNT)~0;
				if (crew_level >= max_crew)
					sprintf (buf, "%u", crew_level);
				else
					sprintf (buf, "%u/%u", crew_level, max_crew);
				SetContextForeGroundColor (
						BUILD_COLOR (MAKE_RGB15 (0x00, 0x14, 0x00), 0x02));
				font_DrawText (&t);
			}

			SetFlashRect (NULL);
			SetFlashRect (&pMS->flash_rect0);
			UnlockMutex (GraphicsLock);
		}
	}

	SleepThread (ONE_SECOND / 30);

	return (TRUE);
}

static HSTARSHIP
GetArmadaStarShip (void)
{
	RECT pick_r;
	CONTEXT OldContext;
	HSTARSHIP hBattleShip;
	
	if (battle_counter[1] == 0)
	{
		// No opponents left.
		return 0;
	}
	
//    MenuSounds = CaptureSound (LoadSound (MENU_SOUNDS));

OldContext = SetContext (SpaceContext);
	DrawArmadaPickShip (FALSE, &pick_r);

	{
		MENU_STATE MenuState;

		MenuState.InputFunc = DoPickBattleShip;
		MenuState.Initialized = FALSE;
		MenuState.first_item.x = NUM_PICK_SHIP_COLUMNS >> 1;
		MenuState.first_item.y = 0;
		MenuState.CurFrame = 0;
		MenuState.flash_rect1.corner = pick_r.corner;
		MenuState.flash_rect1.extent.width = 0;

		UnlockMutex (GraphicsLock);
		SetMenuSounds (MENU_SOUND_ARROWS, MENU_SOUND_SELECT);
		DoInput (&MenuState, FALSE);
		LockMutex (GraphicsLock);

		SetFlashRect (NULL);

		hBattleShip = (HSTARSHIP)MenuState.CurFrame;
	}

	if (hBattleShip)
	{
		if (hBattleShip == GetTailLink (&race_q[0]))
		{	// Player chose SIS. There will be no more choices.
			battle_counter[RPG_PLAYER_NUM] = 1;
		}

		WaitForSoundEnd (0);
	}

//    DestroySound (ReleaseSound (MenuSounds));
	
SetContext (OldContext);

	return (hBattleShip);
}

// Get the next ship to use.
HSTARSHIP
GetEncounterStarShip (STARSHIP *LastStarShipPtr, COUNT which_player)
{
	if (LOBYTE (GLOBAL (CurrentActivity)) == IN_HYPERSPACE)
	{
		assert (which_player == RPG_PLAYER_NUM);
		// SIS for the Hyperspace flight
		return GetHeadLink (&race_q[which_player]);
	}
	else if (LOBYTE (GLOBAL (CurrentActivity)) == SUPER_MELEE)
	{
		// Let the player chose their own ship. (May be a computer player).
		HSTARSHIP hBattleShip;

		if (battle_counter[0] == 0 || battle_counter[1] == 0)
		{	// One side is out of ships. Game over.
			return 0;
		}

		if (!GetNextMeleeStarShip (which_player, &hBattleShip))
			return 0;
		
		return hBattleShip;
	}
	else
	{
		// Full game.
		if (which_player == RPG_PLAYER_NUM)
		{	// Human player in a full game.
			if (LastStarShipPtr == 0 && battle_counter[which_player] == 1)
			{	// First time picking a ship and player has no escorts
				// SIS is the last ship in queue (though there is only one)
				return GetTailLink (&race_q[which_player]);
			}
			else if (battle_counter[which_player])
			{	// Player still has ships left
				return GetArmadaStarShip ();
			}
			else if (LastStarShipPtr != 0)
			{	// last ship was the flagship
#define RUN_AWAY_FUEL_COST (5 * FUEL_TANK_SCALE)
				if (LastStarShipPtr->crew_level == 0)
				{	// Died in the line of duty
					GLOBAL_SIS (CrewEnlisted) = (COUNT)~0;
				}
				else
				{	// Player ran away
					if (GLOBAL_SIS (FuelOnBoard) > RUN_AWAY_FUEL_COST)
						GLOBAL_SIS (FuelOnBoard) -= RUN_AWAY_FUEL_COST;
					else
						GLOBAL_SIS (FuelOnBoard) = 0;
				}
			}
			return 0;
		}
		else
		{	// NPC player in a full game
			if (FleetIsInfinite (which_player))
			{
				if (LastStarShipPtr != 0)
				{	// The current STARSHIP is reused for the next one;
					// update with new info
					// XXX: Note that if Syreen had a homeworld you could
					//   fight, all Syreen ships there would be crewed to
					//   the maximum, instead of the normal level
					LastStarShipPtr->crew_level = LastStarShipPtr->max_crew;
					LastStarShipPtr->playerNr = which_player;
					LastStarShipPtr->captains_name_index = PickCaptainName ();
				}
				battle_counter[which_player]++;
				
				return GetHeadLink (&race_q[which_player]);
			}

			// Get the next ship for the computer
			if (LastStarShipPtr != 0)
				return _GetSuccLink (LastStarShipPtr);

			// Get the very first ship for the computer
			return GetHeadLink (&race_q[which_player]);
		}
	}
}

void
DrawArmadaPickShip (BOOLEAN draw_salvage_frame, RECT *pPickRect)
{
#define PICK_NAME_HEIGHT 6
	//COUNT i;
	HSTARSHIP hBattleShip, hNextShip;
	STARSHIP *StarShipPtr;
	RECT r, pick_r;
	STAMP s;
	TEXT t;
	CONTEXT OldContext;
	FRAME PickFrame;

	OldContext = SetContext (SpaceContext);

	PickFrame = CaptureDrawable (LoadGraphic (SC2_PICK_PMAP_ANIM));

	BatchGraphics ();

	s.frame = PickFrame;
	SetFrameHot (s.frame, MAKE_HOT_SPOT (0, 0));
	GetFrameRect (s.frame, &pick_r);
	GetContextClipRect (&r);
	pick_r.corner.x = (r.extent.width >> 1) - (pick_r.extent.width >> 1);
	pick_r.corner.y = (r.extent.height >> 1) - (pick_r.extent.height >> 1);
	
	if (!draw_salvage_frame)
		*pPickRect = pick_r;
	else
	{
		s.origin.x = r.extent.width >> 1;
		s.frame = IncFrameIndex (s.frame);
		SetFrameHot (s.frame, MAKE_HOT_SPOT (0, 0));
		GetFrameRect (s.frame, &r);
		s.origin.x -= r.extent.width >> 1;
		s.origin.y = pick_r.corner.y - (r.extent.height >> 1);
		DrawStamp (&s);
		s.frame = DecFrameIndex (s.frame);
		pick_r.corner.y = s.origin.y + r.extent.height;

		r.corner.x = pick_r.corner.x;
		r.corner.y = s.origin.y;
		*pPickRect = r;
	}
	s.origin = pick_r.corner;
	DrawStamp (&s);

	t.baseline.x = pick_r.corner.x + (pick_r.extent.width >> 1);
	t.baseline.y = pick_r.corner.y + pick_r.extent.height - 5;
	t.align = ALIGN_CENTER;
	t.pStr = GLOBAL_SIS (ShipName);
	t.CharCount = (COUNT)~0;
	SetContextForeGroundColor (
			BUILD_COLOR (MAKE_RGB15 (0x12, 0x12, 0x12), 0x17));
	SetContextFont (StarConFont);
	font_DrawText (&t);

	r.extent.width = ICON_WIDTH;
	r.extent.height = ICON_HEIGHT;
	for (hBattleShip = GetHeadLink (&race_q[0]);
			hBattleShip != 0; hBattleShip = hNextShip)
	{
		StarShipPtr = LockStarShip (&race_q[0], hBattleShip);

		if (StarShipPtr->captains_name_index)
		{	// Escort ship, not SIS
			COUNT ship_index;

			ship_index = StarShipPtr->index;

			s.origin.x = pick_r.corner.x
					+ (5 + ((ICON_WIDTH + 4)
					* (ship_index % NUM_PICK_SHIP_COLUMNS)));
			if ((ship_index % NUM_PICK_SHIP_COLUMNS) >=
					(NUM_PICK_SHIP_COLUMNS >> 1))
				s.origin.x += FLAGSHIP_WIDTH + 4;
			s.origin.y = pick_r.corner.y
					+ (16 + ((ICON_HEIGHT + 4)
					* (ship_index / NUM_PICK_SHIP_COLUMNS)));
			s.frame = StarShipPtr->icons;
			r.corner = s.origin;
			SetContextForeGroundColor (BLACK_COLOR);
			DrawFilledRectangle (&r);
			if ((StarShipPtr->SpeciesID != NO_ID) || (StarShipPtr->crew_level == 0))
			{
				DrawStamp (&s);
				if (StarShipPtr->SpeciesID == NO_ID)
				{
					/* Dead ship - mark with an X. */
					s.origin.x -= 1;
					s.frame = SetAbsFrameIndex (StatusFrame, 3);
					DrawStamp (&s);
				}
			}
			else
			{
				/* Ship ran away */
				SetContextForeGroundColor (
						BUILD_COLOR (MAKE_RGB15 (0x00, 0x00, 0x14), 0x01));
				DrawFilledStamp (&s);
			}
		}

		hNextShip = _GetSuccLink (StarShipPtr);
		UnlockStarShip (&race_q[0], hBattleShip);
	}

	UnbatchGraphics ();
	
	DestroyDrawable (ReleaseDrawable (PickFrame));

	SetContext (OldContext);
}

