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/* $Id$ */

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#include "stdafx.h"

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#include "openttd.h"

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#include "functions.h"

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#include "string.h"

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#include "table/strings.h"

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#include "command.h"

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#include "player.h"

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#include "gfx.h"

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#include "window.h"

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#include "gui.h"

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#include "economy.h"

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#include "network.h"

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#include "variables.h"

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/** Change the player's face.

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 * @param tile unused

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 * @param p1 unused

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 * @param p2 face bitmasked

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 */

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int32 CmdSetPlayerFace(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

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	if (flags & DC_EXEC) {

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		GetPlayer(_current_player)->face = p2;

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		MarkWholeScreenDirty();

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	}

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	return 0;

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}

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/** Change the player's company-colour

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 * @param tile unused

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 * @param p1 unused

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 * @param p2 new colour for vehicles, property, etc.

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 */

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int32 CmdSetPlayerColor(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

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	Player *p, *pp;

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	byte colour;

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	if (p2 >= 16) return CMD_ERROR; // max 16 colours

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	colour = p2;

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	p = GetPlayer(_current_player);

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	/* Ensure no two companies have the same colour */

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	FOR_ALL_PLAYERS(pp) {

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		if (pp->is_active && pp != p && pp->player_color == colour)

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			return CMD_ERROR;

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	}

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	if (flags & DC_EXEC) {

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		_player_colors[_current_player] = colour;

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		p->player_color = colour;

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		MarkWholeScreenDirty();

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	}

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	return 0;

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}

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/** Increase the loan of your company.

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 * @param tile unused

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 * @param p1 unused

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 * @param p2 when set, loans the maximum amount in one go (press CTRL)

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 */

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int32 CmdIncreaseLoan(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

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	Player *p;

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	p = GetPlayer(_current_player);

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	if (p->current_loan >= _economy.max_loan) {

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		SetDParam(0, _economy.max_loan);

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		return_cmd_error(STR_702B_MAXIMUM_PERMITTED_LOAN);

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	}

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	if (flags & DC_EXEC) {

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		/* Loan the maximum amount or not? */

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		int32 loan = (p2) ? _economy.max_loan - p->current_loan : (IS_HUMAN_PLAYER(_current_player) || _patches.ainew_active) ? 10000 : 50000;

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		p->money64 += loan;

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		p->current_loan += loan;

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		UpdatePlayerMoney32(p);

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		InvalidatePlayerWindows(p);

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	}

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	return 0;

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}

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/** Decrease the loan of your company.

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 * @param tile unused

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 * @param p1 unused

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 * @param p2 when set, pays back the maximum loan permitting money (press CTRL)

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 */

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int32 CmdDecreaseLoan(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

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	Player *p;

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	int32 loan;

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	p = GetPlayer(_current_player);

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	if (p->current_loan == 0) return_cmd_error(STR_702D_LOAN_ALREADY_REPAYED);

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	loan = p->current_loan;

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	/* p2 is true while CTRL is pressed (repay all possible loan, or max money you have)

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	 * Repay any loan in chunks of 10.000 pounds */

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	if (p2) {

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		loan = min(loan, p->player_money);

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		loan = max(loan, 10000);

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		loan -= loan % 10000;

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	} else {

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		loan = min(loan, (IS_HUMAN_PLAYER(_current_player) || _patches.ainew_active) ? 10000 : 50000);

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	}

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	if (p->player_money < loan) {

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		SetDParam(0, loan);

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		return_cmd_error(STR_702E_REQUIRED);

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	}

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	if (flags & DC_EXEC) {

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		p->money64 -= loan;

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		p->current_loan -= loan;

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		UpdatePlayerMoney32(p);

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		InvalidatePlayerWindows(p);

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	}

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	return 0;

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}

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/** Change the name of the company.

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 * @param tile unused

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 * @param p1 unused

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 * @param p2 unused

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 */

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int32 CmdChangeCompanyName(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

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	StringID str;

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	Player *p;

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	if (_cmd_text[0] == '\0') return CMD_ERROR;

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	str = AllocateNameUnique(_cmd_text, 4);

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	if (str == 0) return CMD_ERROR;

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	if (flags & DC_EXEC) {

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		p = GetPlayer(_current_player);

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		DeleteName(p->name_1);

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		p->name_1 = str;

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		MarkWholeScreenDirty();

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	} else {

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		DeleteName(str);

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	}

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	return 0;

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}

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/** Change the name of the president.

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 * @param tile unused

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 * @param p1 unused

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 * @param p2 unused

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 */

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int32 CmdChangePresidentName(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

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	StringID str;

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	Player *p;

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	if (_cmd_text[0] == '\0') return CMD_ERROR;

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	str = AllocateNameUnique(_cmd_text, 4);

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	if (str == 0) return CMD_ERROR;

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	if (flags & DC_EXEC) {

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		p = GetPlayer(_current_player);

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		DeleteName(p->president_name_1);

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		p->president_name_1 = str;

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		if (p->name_1 == STR_SV_UNNAMED) {

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			char buf[80];

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			snprintf(buf, lengthof(buf), "%s Transport", _cmd_text);

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			_cmd_text = buf;

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			DoCommand(0, 0, 0, DC_EXEC, CMD_CHANGE_COMPANY_NAME);

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		}

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		MarkWholeScreenDirty();

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	} else {

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		DeleteName(str);

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	}

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	return 0;

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}

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/** Pause/Unpause the game (server-only).

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 * Increase or decrease the pause counter. If the counter is zero,

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 * the game is unpaused. A counter is used instead of a boolean value

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 * to have more control over the game when saving/loading, etc.

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 * @param tile unused

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 * @param p1 0 = decrease pause counter; 1 = increase pause counter

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 * @param p2 unused

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 */

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int32 CmdPause(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

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	if (flags & DC_EXEC) {

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		_pause += (p1 == 1) ? 1 : -1;

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		if (_pause == (byte)-1) _pause = 0;

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		InvalidateWindow(WC_STATUS_BAR, 0);

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		InvalidateWindow(WC_MAIN_TOOLBAR, 0);

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	}

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	return 0;

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}

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/** Change the financial flow of your company.

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 * This is normally only enabled in offline mode, but if there is a debug

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 * build, you can cheat (to test).

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 * @param tile unused

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 * @param p1 the amount of money to receive (if negative), or spend (if positive)

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 * @param p2 unused

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 */

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int32 CmdMoneyCheat(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

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#ifndef _DEBUG

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	if (_networking) return CMD_ERROR;

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#endif

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	SET_EXPENSES_TYPE(EXPENSES_OTHER);

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	return (int32)p1;

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}

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/** Transfer funds (money) from one player to another.

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 * To prevent abuse	in multiplayer games you can only send money to other

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 * players if you have paid off your loan (either explicitely, or implicitely

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 * given the fact that you have more money than loan).

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 * @param tile unused

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 * @param p1 the amount of money to transfer; max 20.000.000

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 * @param p2 the player to transfer the money to

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 */

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int32 CmdGiveMoney(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

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	const Player *p = GetPlayer(_current_player);

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	int32 amount = min((int32)p1, 20000000);

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	SET_EXPENSES_TYPE(EXPENSES_OTHER);

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	/* You can only transfer funds that is in excess of your loan */

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	if (p->money64 - p->current_loan < amount || amount <= 0) return CMD_ERROR;

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	if (!_networking || p2 >= MAX_PLAYERS) return CMD_ERROR;

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	if (flags & DC_EXEC) {

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		/* Add money to player */

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		PlayerID old_cp = _current_player;

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		_current_player = p2;

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		SubtractMoneyFromPlayer(-amount);

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		_current_player = old_cp;

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	}

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	/* Subtract money from local-player */

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	return amount;

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}

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/** Change difficulty level/settings (server-only).

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 * We cannot really check for valid values of p2 (too much work mostly); stored

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 * in file 'settings_gui.c' _game_setting_info[]; we'll just trust the server it knows

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 * what to do and does this correctly

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 * @param tile unused

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 * @param p1 the difficulty setting being changed. If it is -1, the difficulty level

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 *           itself is changed. The new value is inside p2

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 * @param p2 new value for a difficulty setting or difficulty level

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 */

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int32 CmdChangeDifficultyLevel(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

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	if (p1 != (uint32)-1L && ((int32)p1 >= GAME_DIFFICULTY_NUM || (int32)p1 < 0)) return CMD_ERROR;

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	if (flags & DC_EXEC) {

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		if (p1 != (uint32)-1L) {

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			((int*)&_opt_ptr->diff)[p1] = p2;

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			_opt_ptr->diff_level = 3; // custom difficulty level

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		} else {

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			_opt_ptr->diff_level = p2;

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		}

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		/* If we are a network-client, update the difficult setting (if it is open).

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		 * Use this instead of just dirtying the window because we need to load in

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		 * the new difficulty settings */

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		if (_networking && !_network_server && FindWindowById(WC_GAME_OPTIONS, 0) != NULL)

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			ShowGameDifficulty();

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	}

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	return 0;

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}