/*

 * This file is part of OpenTTD.

 * OpenTTD 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, version 2.

 * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.

 */

/** @file language.h Information about languages and their files. */

#ifndef LANGUAGE_H

#define LANGUAGE_H

#include "core/smallvec_type.hpp"

#ifdef WITH_ICU_I18N

#include <unicode/coll.h>

#endif /* WITH_ICU_I18N */

#include "strings_type.h"

static const uint8 CASE_GENDER_LEN = 16; ///< The (maximum) length of a case/gender string.

static const uint8 MAX_NUM_GENDERS =  8; ///< Maximum number of supported genders.

static const uint8 MAX_NUM_CASES   = 16; ///< Maximum number of supported cases.

/** Header of a language file. */

struct LanguagePackHeader {

	static const uint32 IDENT = 0x474E414C; ///< Identifier for OpenTTD language files, big endian for "LANG"

	uint32 ident;       ///< 32-bits identifier

	uint32 version;     ///< 32-bits of auto generated version info which is basically a hash of strings.h

	char name[32];      ///< the international name of this language

	char own_name[32];  ///< the localized name of this language

	char isocode[16];   ///< the ISO code for the language (not country code)

	uint16 offsets[TEXT_TAB_END]; ///< the offsets

	/** Thousand separator used for anything not currencies */

	char digit_group_separator[8];

	/** Thousand separator used for currencies */

	char digit_group_separator_currency[8];

	/** Decimal separator */

	char digit_decimal_separator[8];

	uint16 missing;     ///< number of missing strings.

	byte plural_form;   ///< plural form index

	byte text_dir;      ///< default direction of the text

	/**

	 * Windows language ID:

	 * Windows cannot and will not convert isocodes to something it can use to

	 * determine whether a font can be used for the language or not. As a result

	 * of that we need to pass the language id via strgen to OpenTTD to tell

	 * what language it is in "Windows". The ID is the 'locale identifier' on:

	 *   http://msdn.microsoft.com/en-us/library/ms776294.aspx

	 */

	uint16 winlangid;   ///< windows language id

	uint8 newgrflangid; ///< newgrf language id

	uint8 num_genders;  ///< the number of genders of this language

	uint8 num_cases;    ///< the number of cases of this language

	byte pad[3];        ///< pad header to be a multiple of 4

	char genders[MAX_NUM_GENDERS][CASE_GENDER_LEN]; ///< the genders used by this translation

	char cases[MAX_NUM_CASES][CASE_GENDER_LEN];     ///< the cases used by this translation

	bool IsValid() const;

	/**

	 * Get the index for the given gender.

	 * @param gender_str The string representation of the gender.

	 * @return The index of the gender, or MAX_NUM_GENDERS when the gender is unknown.

	 */

	uint8 GetGenderIndex(const char *gender_str) const

	{

		for (uint8 i = 0; i < MAX_NUM_GENDERS; i++) {

			if (strcmp(gender_str, this->genders[i]) == 0) return i;

		}

		return MAX_NUM_GENDERS;

	}

	/**

	 * Get the index for the given case.

	 * @param case_str The string representation of the case.

	 * @return The index of the case, or MAX_NUM_CASES when the case is unknown.

	 */

	uint8 GetCaseIndex(const char *case_str) const

	{

		for (uint8 i = 0; i < MAX_NUM_CASES; i++) {

			if (strcmp(case_str, this->cases[i]) == 0) return i;

		}

		return MAX_NUM_CASES;

	}

};

/** Make sure the size is right. */

assert_compile(sizeof(LanguagePackHeader) % 4 == 0);

/** Metadata about a single language. */

struct LanguageMetadata : public LanguagePackHeader {

	char file[MAX_PATH]; ///< Name of the file we read this data from.

};

/** Type for the list of language meta data. */

/** The actual list of language meta data. */

extern LanguageList _languages;

/** The currently loaded language. */

extern const LanguageMetadata *_current_language;

#ifdef WITH_ICU_I18N

extern icu::Collator *_current_collator;

#endif /* WITH_ICU_I18N */

bool ReadLanguagePack(const LanguageMetadata *lang);

const LanguageMetadata *GetLanguage(byte newgrflangid);

#endif /* LANGUAGE_H */