/*

 * Hedgewars, a free turn based strategy game

 * Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.com>

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

 */

#include "inihelper.h"

#include "../iniparser/dictionary.h"

#include "../iniparser/iniparser.h"

#include "logging.h"

#include "util.h"

#include <string.h>

#include <stdlib.h>

#include <ctype.h>

#include <limits.h>

#include <errno.h>

#include <stdarg.h>

struct _flib_ini {

	dictionary *inidict;

	char *currentSection;

};

static char *createDictKey(const char *sectionName, const char *keyName) {

	return flib_asprintf("%s:%s", sectionName, keyName);

}

/**

 * Turns a string into a lowercase string, in-place.

 */

static void strToLower(char *str) {

	if(str) {

		while(*str) {

			*str = tolower(*str);

			str++;

		}

	}

}

flib_ini *flib_ini_create(const char *filename) {

	flib_ini *result = NULL;

	flib_ini *tmpIni = flib_calloc(1, sizeof(flib_ini));

	if(tmpIni) {

		if(filename) {

			tmpIni->inidict = iniparser_load(filename);

		}

		if(!tmpIni->inidict) {

			tmpIni->inidict = dictionary_new(0);

		}

		if(tmpIni->inidict) {

			result = tmpIni;

			tmpIni = NULL;

		}

	}

	flib_ini_destroy(tmpIni);

	return result;

}

flib_ini *flib_ini_load(const char *filename) {

	flib_ini *result = NULL;

	if(!log_badargs_if(filename==NULL)) {

		flib_ini *tmpIni = flib_calloc(1, sizeof(flib_ini));

		if(tmpIni) {

			tmpIni->inidict = iniparser_load(filename);

			if(tmpIni->inidict) {

				result = tmpIni;

				tmpIni = NULL;

			}

		}

		flib_ini_destroy(tmpIni);

	}

	return result;

}

int flib_ini_save(flib_ini *ini, const char *filename) {

	int result = INI_ERROR_OTHER;

	if(!log_badargs_if2(ini==NULL, filename==NULL)) {

		FILE *file = fopen(filename, "wb");

		if(!file) {

			flib_log_e("Error opening file \"%s\" for writing.", filename);

		} else {

			iniparser_dump_ini(ini->inidict, file);

			if(fclose(file)) {

				flib_log_e("Write error on ini file \"%s\"", filename);

			} else {

				result = 0;

			}

		}

	}

	return result;

}

void flib_ini_destroy(flib_ini *ini) {

	if(ini) {

		if(ini->inidict) {

			iniparser_freedict(ini->inidict);

		}

		free(ini->currentSection);

		free(ini);

	}

}

int flib_ini_enter_section(flib_ini *ini, const char *section) {

	int result = INI_ERROR_OTHER;

	if(ini) {

		free(ini->currentSection);

		ini->currentSection = NULL;

	}

	if(!log_badargs_if2(ini==NULL, section==NULL)) {

		if(!iniparser_find_entry(ini->inidict, section)) {

			flib_log_d("Ini section %s not found", section);

			result = INI_ERROR_NOTFOUND;

		} else {

			ini->currentSection = flib_strdupnull(section);

			if(ini->currentSection) {

				// Usually iniparser ignores case, but some section-handling functions don't,

				// so we set it to lowercase manually

				strToLower(ini->currentSection);

				result = 0;

			}

		}

	}

	return result;

}

int flib_ini_create_section(flib_ini *ini, const char *section) {

	int result = INI_ERROR_OTHER;

	if(!log_badargs_if2(ini==NULL, section==NULL)) {

		result = flib_ini_enter_section(ini, section);

		if(result == INI_ERROR_NOTFOUND) {

			if(iniparser_set(ini->inidict, section, NULL)) {

				flib_log_e("Error creating ini section %s", section);

				result = INI_ERROR_OTHER;

			} else {

				result = flib_ini_enter_section(ini, section);

			}

		}

	}

	return result;

}

/**

 * The result is an internal string of the iniparser, don't free it.

 */

static char *findValue(dictionary *dict, const char *section, const char *key) {

	char *result = NULL;

	char *dictKey = createDictKey(section, key);

	if(dictKey) {

		result = iniparser_getstring(dict, dictKey, NULL);

	}

	free(dictKey);

	return result;

}

int flib_ini_get_str(flib_ini *ini, char **outVar, const char *key) {

	char *tmpValue = NULL;

	int result = flib_ini_get_str_opt(ini, &tmpValue, key, NULL);

	if(result==0) {

		if(tmpValue == NULL) {

			result = INI_ERROR_NOTFOUND;

		} else {

			*outVar = tmpValue;

			tmpValue = NULL;

		}

	}

	free(tmpValue);

	return result;

}

int flib_ini_get_str_opt(flib_ini *ini, char **outVar, const char *key, const char *def) {

	int result = INI_ERROR_OTHER;

	if(!log_badargs_if4(ini==NULL, ini->currentSection==NULL, outVar==NULL, key==NULL)) {

		const char *value = findValue(ini->inidict, ini->currentSection, key);

		if(!value) {

			value = def;

		}

		char *valueDup = flib_strdupnull(value);

		if(valueDup || !def) {

			*outVar = valueDup;

			result = 0;

		}

	}

	return result;

}

int flib_ini_get_int(flib_ini *ini, int *outVar, const char *key) {

	char *tmpValue = NULL;

	int result = flib_ini_get_str(ini, &tmpValue, key);

	if(result==0) {

		errno = 0;

		long val = strtol(tmpValue, NULL, 10);

		if(errno!=0 || val<INT_MIN || val>INT_MAX) {

			flib_log_w("Cannot parse ini setting %s/%s = \"%s\" as integer.", ini->currentSection, key, tmpValue);

			result = INI_ERROR_FORMAT;

		} else {

			*outVar = val;

		}

	}

	free(tmpValue);

	return result;

}

int flib_ini_get_int_opt(flib_ini *ini, int *outVar, const char *key, int def) {

	int tmpValue;

	int result = flib_ini_get_int(ini, &tmpValue, key);

	if(result == 0) {

		*outVar = tmpValue;

	} else if(result == INI_ERROR_NOTFOUND || result == INI_ERROR_FORMAT) {

		*outVar = def;

		result = 0;

	}

	return result;

}

int flib_ini_get_bool(flib_ini *ini, bool *outVar, const char *key) {

	char *tmpValue = NULL;

	int result = flib_ini_get_str(ini, &tmpValue, key);

	if(result==0) {

		bool trueval = strchr("1tTyY", tmpValue[0]);

		bool falseval = strchr("0fFnN", tmpValue[0]);

		if(!trueval && !falseval) {

			flib_log_w("ini setting %s/%s = \"%s\" is not a recognized truth value.", ini->currentSection, key, tmpValue);

			result = INI_ERROR_FORMAT;

		} else {

			*outVar = trueval;

		}

	}

	free(tmpValue);

	return result;

}

int flib_ini_get_bool_opt(flib_ini *ini, bool *outVar, const char *key, bool def) {

	bool tmpValue;

	int result = flib_ini_get_bool(ini, &tmpValue, key);

	if(result == 0) {

		*outVar = tmpValue;

	} else if(result == INI_ERROR_NOTFOUND || result == INI_ERROR_FORMAT) {

		*outVar = def;

		result = 0;

	}

	return result;

}

int flib_ini_set_str(flib_ini *ini, const char *key, const char *value) {

	int result = INI_ERROR_OTHER;

	if(!log_badargs_if4(ini==NULL, ini->currentSection==NULL, key==NULL, value==NULL)) {

		char *dictKey = createDictKey(ini->currentSection, key);

		if(dictKey) {

			result = iniparser_set(ini->inidict, dictKey, value);

			if(result) {

				flib_log_e("Error setting ini entry %s to %s", dictKey, value);

			}

		}

		free(dictKey);

	}

	return result;

}

int flib_ini_set_int(flib_ini *ini, const char *key, int value) {

	int result = INI_ERROR_OTHER;

	char *strvalue = flib_asprintf("%i", value);

	if(strvalue) {

		result = flib_ini_set_str(ini, key, strvalue);

	}

	free(strvalue);

	return result;

}

int flib_ini_set_bool(flib_ini *ini, const char *key, bool value) {

	return flib_ini_set_str(ini, key, value ? "true" : "false");

}

int flib_ini_get_sectioncount(flib_ini *ini) {

	if(!log_badargs_if(ini==NULL)) {

		return iniparser_getnsec(ini->inidict);

	}

	return INI_ERROR_OTHER;

}

char *flib_ini_get_sectionname(flib_ini *ini, int number) {

	if(!log_badargs_if2(ini==NULL, number<0)) {

		return flib_strdupnull(iniparser_getsecname(ini->inidict, number));

	}

	return NULL;

}

int flib_ini_get_keycount(flib_ini *ini) {

	if(!log_badargs_if2(ini==NULL, ini->currentSection==NULL)) {

		return iniparser_getsecnkeys(ini->inidict, ini->currentSection);

	}

	return INI_ERROR_OTHER;

}

char *flib_ini_get_keyname(flib_ini *ini, int number) {

	char *result = NULL;

	if(!log_badargs_if3(ini==NULL, ini->currentSection==NULL, number<0)) {

		int keyCount = iniparser_getsecnkeys(ini->inidict, ini->currentSection);

		char **keys = iniparser_getseckeys(ini->inidict, ini->currentSection);

		if(keys && keyCount>number) {

			// The keys are in the format section:key, so we have to skip the section and colon.

			result = flib_strdupnull(keys[number]+strlen(ini->currentSection)+1);

		}

		free(keys);

	}

	return result;

}