#include "ini-config.h"

const char* INI_ConfigGetCommandlineOption(uint8_t argc, const char* argv[], const char* val) {
	size_t n = strlen(val);
	int c = argc;

	while (--c > 0) {
		if (!strncmp(argv[c], val, n)) {
			if (!*(argv[c] + n) && c < argc - 1) {
				/* coverity treats unchecked argv as "tainted" */
				if (!argv[c + 1] || strlen(argv[c + 1]) > 1024)
					return NULL;
				return argv[c + 1];
			}

			if (argv[c][n] == '=')
				return &argv[c][n + 1];
			return argv[c] + n;
		}
	}

	return NULL;
}

void INI_ConfigLoad(INI_ConfigItem item[], const char* config_path) {
	uint8_t i;
	for (i = 0; item[i].type.size > 0; i += 1) {
		if (!item[i].type.load) {
			continue;
		}
		item[i].type.load(&item[i], config_path, item);
	}
}

INI_ConfigSaveResult INI_ConfigSave(INI_ConfigItem item[], const char* config_path) {
	uint8_t i;
	int32_t problems = 0;
	for (i = 0; item[i].type.size > 0; i += 1) {
		int32_t result = item[i].type.save ? item[i].type.save(&item[i], config_path, item) : 0;

		if (result < 0) {
			problems |= (1 << (int32_t) i);
		}
	}

	return -problems;
}

void INI_ConfigOverride(INI_ConfigItem item[], uint8_t argc, const char* argv[]) {
	uint8_t i;
	for (i = 0; item[i].type.size > 0; i += 1) {
		if (!item[i].type.override) {
			continue;
		}

		item[i].type.override(&item[i], argc, argv);
		// TODO specify command-line arg external from config item?

	}
}

INI_ConfigInitializeResult INI_ConfigInitialize(INI_ConfigItem item[], const char* config_path, uint8_t argc, const char* argv[]) {
	INI_ConfigLoad(item, config_path);
	INI_ConfigSaveResult save_result = INI_ConfigSave(item, config_path);
	if (save_result < 0) {
		return INI_CONFIG_INITIALIZE_RESULT_ERROR;
	}
	INI_ConfigOverride(item, argc, argv);
	if (save_result > 0) {
		return INI_CONFIG_INITIALIZE_RESULT_WARNING;
	}
	return INI_CONFIG_INITIALIZE_RESULT_OK;
}