#include "config.h"

/*
 * Checks if the given path exists by calling stat().
 *
 */
bool path_exists(const char *path) {
    struct stat buf;
    return (stat(path, &buf) == 0);
}

/*
 * This function resolves ~ in pathnames.
 */
char* resolveTilde(const char *path) {
	static glob_t globbuf;
	static char *ret = NULL;

	int res = glob(path, GLOB_TILDE, NULL, &globbuf);
	/* no match, or many wildcard matches are bad */
	if (res == GLOB_NOMATCH)
		ret = strdup(path);
	else if (res != 0) {
		printf("glob() failed\n");
	} else {
		ret = strdup(globbuf.gl_pathv[0]);
	}
	globfree(&globbuf);
	return ret;
}

/*
* Returns a pointer to a config object containing defaults
*/
Config* configDefaults(){
	Config *conf = malloc( sizeof( Config ) );
	conf->database = strdup("proxy.sqlite");
	conf->port = 8080;
	conf->localConfig = strdup("proxy.conf");
	conf->userConfig = getUserConfigFile("proxy.conf");
	conf->certfile = getUserConfigFile("cert.pem");
	conf->keyfile = getUserConfigFile("key.pem");
	
	return conf;
}

void maybeMakeDir(const char *path){
	if ( path_exists( path ) ) return;
	mkdir( path, 0700 );
}

char* getConfigDir(){
	char *xdg_config_home;
	if ((xdg_config_home = getenv("XDG_CONFIG_HOME")) == NULL)
		xdg_config_home = resolveTilde("~/.config");

	char configDir[strlen(xdg_config_home) + 6];
	memset(configDir, '\0', strlen(xdg_config_home) + 6);
	
	sprintf( configDir, "%s/yaip", xdg_config_home );
	
	return strdup(configDir);
}

char* getUserConfigFile(char *filename){
	//This doesn't end in a slash
	char *configDir = getConfigDir();
	//Make sure our filename doesn't start with a slash
	while ( filename[0] == '/' ) filename++;
	// Allocate space for both parts, a slash and a \0
	char retFile[strlen(configDir) + strlen(filename) + 2];

	memset(retFile, '\0', strlen(configDir) + strlen(filename) + 2);

	sprintf(retFile, "%s/%s", configDir, filename);

	return strdup(retFile);
}


void setConfig(Config *config, char option[], char value[]){
	if ( strcmp( option, "database" ) == 0 ){
		config->database = value;
	} else if ( strcmp( option, "localConfig" ) == 0 ){
		config->localConfig = value;
	} else if ( strcmp( option, "userConfig" ) == 0 ){
		config->userConfig = value;
	} else if ( strcmp( option, "port" ) == 0 ){
		config->port = atoi(value);
	}
}

void printConfig(Config *config){
	printf("Database: %s\n", config->database);
	printf("localConfig: %s\n", config->localConfig);
	printf("userConfig: %s\n", config->userConfig);
	printf("port: %i\n", config->port);
}