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/* $Id$ */

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#include "stdafx.h"

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#include "openttd.h"

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#include "currency.h"

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#include "news.h"

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#include "variables.h"

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#include "table/strings.h"

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#include "date.h"

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	//   exchange rate    prefix             symbol_pos

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	//   |  separator        |     postfix   |

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	//   |   |    Euro year  |       |       |    name

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	//   |   |    |          |       |       |    |

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const CurrencySpec origin_currency_specs[NUM_CURRENCY] = {

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	{    1, ',', CF_NOEURO, "\xA3", "",      0,  STR_CURR_GBP    }, // british pounds

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	{    2, ',', CF_NOEURO, "$",    "",      0,  STR_CURR_USD    }, // us dollars

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	{    2, ',', CF_ISEURO, "¤",    "",      0,  STR_CURR_EUR    }, // Euro

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	{  200, ',', CF_NOEURO, "\xA5", "",      0,  STR_CURR_YEN    }, // yen

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	{   19, ',', 2002,      "",     " S.",   1,  STR_CURR_ATS    }, // austrian schilling

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	{   57, ',', 2002,      "BEF ", "",      0,  STR_CURR_BEF    }, // belgian franc

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	{    2, ',', CF_NOEURO, "CHF ", "",      0,  STR_CURR_CHF    }, // swiss franc

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	{   50, ',', CF_NOEURO, "",     " Kc",   1,  STR_CURR_CZK    }, // czech koruna // TODO: Should use the "c" with an upside down "^"

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	{    4, '.', 2002,      "DM ",  "",      0,  STR_CURR_DEM    }, // deutsche mark

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	{   10, '.', CF_NOEURO, "",     " kr",   1,  STR_CURR_DKK    }, // danish krone

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	{  200, '.', 2002,      "Pts ", "",      0,  STR_CURR_ESP    }, // spanish pesetas

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	{    8, ',', 2002,      "",     " mk",   1,  STR_CURR_FIM    }, // finnish markka

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	{   10, '.', 2002,      "FF ",  "",      0,  STR_CURR_FRF    }, // french francs

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	{  480, ',', 2002,      "",     "Dr.",   1,  STR_CURR_GRD    }, // greek drachma

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	{  376, ',', 2002,      "",     " Ft",   1,  STR_CURR_HUF    }, // hungarian forint

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	{  130, '.', CF_NOEURO, "",     " Kr",   1,  STR_CURR_ISK    }, // icelandic krona

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	{ 2730, ',', 2002,      "",     " L.",   1,  STR_CURR_ITL    }, // italian lira

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	{    3, ',', 2002,      "NLG ", "",      0,  STR_CURR_NLG    }, // dutch gulden

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	{   11, '.', CF_NOEURO, "",     " Kr",   1,  STR_CURR_NOK    }, // norwegian krone

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	{    6, ' ', CF_NOEURO, "",     " zl",   1,  STR_CURR_PLN    }, // polish zloty

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	{    6, '.', CF_NOEURO, "",     " Lei",  1,  STR_CURR_ROL    }, // romanian Lei

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	{    5, ' ', CF_NOEURO, "",     " p",    1,  STR_CURR_RUR    }, // russian rouble

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	{  350, '.', CF_NOEURO, "",     " SIT",  1,  STR_CURR_SIT    }, // slovenian tolar

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	{   13, '.', CF_NOEURO, "",     " Kr",   1,  STR_CURR_SEK    }, // swedish krona

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	{    1, ' ', CF_NOEURO, "",     "",      0,  STR_CURR_CUSTOM }, // custom currency

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};

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/* Array of currencies used by the system */

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CurrencySpec _currency_specs[NUM_CURRENCY];

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/* get a mask of the allowed currencies depending on the year */

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uint GetMaskOfAllowedCurrencies(void)

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{

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	uint mask = 0;

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	uint i;

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	for (i = 0; i < NUM_CURRENCY; i++) {

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		Year to_euro = _currency_specs[i].to_euro;

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		if (to_euro != CF_NOEURO && to_euro != CF_ISEURO && _cur_year >= to_euro) continue;

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		if (to_euro == CF_ISEURO && _cur_year < 2000) continue;

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		mask |= (1 << i);

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	}

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	mask |= (1 << CUSTOM_CURRENCY_ID); // always allow custom currency

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	return mask;

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}

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/**

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 * Verify if the currency chosen by the user is about to be converted to Euro

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 **/

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void CheckSwitchToEuro(void)

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{

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	if (_currency_specs[_opt.currency].to_euro != CF_NOEURO &&

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			_currency_specs[_opt.currency].to_euro != CF_ISEURO &&

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			_cur_year >= _currency_specs[_opt.currency].to_euro) {

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		_opt.currency = 2; // this is the index of euro above.

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		AddNewsItem(STR_EURO_INTRODUCE, NEWS_FLAGS(NM_NORMAL, 0, NT_ECONOMY, 0), 0, 0);

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	}

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}

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/**

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 * Called only from newgrf.c.  Will fill _currency_specs array with

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 * default values from origin_currency_specs

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 **/

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void ResetCurrencies(void)

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{

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	memcpy(&_currency_specs, &origin_currency_specs, sizeof(origin_currency_specs));

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}

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/**

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 * Build a list of currency names StringIDs to use in a dropdown list

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 * @return Pointer to a (static) array of StringIDs

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 */

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StringID* BuildCurrencyDropdown(void)

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{

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	/* Allow room for all currencies, plus a terminator entry */

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	static StringID names[CUSTOM_CURRENCY_ID];

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	uint i;

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	/* Add each name */

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	for (i = 0; i < NUM_CURRENCY; i++) {

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		names[i] = _currency_specs[i].name;

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	}

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	/* Terminate the list */

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	names[i] = INVALID_STRING_ID;

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	return names;

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}