#include <string>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "cfg.h"

std::string Config::GetFilenameInHome () {
	std::string res = "";
	char *env = NULL;

	env = secure_getenv("HOME");
	if (env != NULL)
		res = env;

	res = res + "/" + FBSH_CFGFILE;

	return res;
}


std::string Config::GetDefaultSIDFile () {
	std::string res = "";
	char *env = NULL;

	env = secure_getenv("HOME");
	if (env != NULL)
		res = env;

	res = res + "/" + FBSH_SIDFILE;

	return res;
}


/*
 * if saving password is disabled the password will be deleted.
 * The configuration file must be saved manually..
 */
void Config::SetSavePassword(bool enable) {
	savepassword = enable;
	if (!savepassword) {
		password = "";
		username = "";
	}
}


/*
 * the constructor will need to set all parameters to default,
 * and read the configuration file.
 *
 * Since this class/object is defined as global object, it will
 * do this before the command line parameters are read in the
 * main function.
 */
Config::Config() {
	filename = GetFilenameInHome();
	sidfile = GetDefaultSIDFile();
	username = "";
	password = "";
	savepassword = false;
	silent = false;
	LoadConfig();
}


/*
 * nothing to do here, we have no autosave of the cofiguration file.
 */
Config::~Config() {
}


/*
 * just load all parameters found in the configuration file into the configuration
 */
#define BUFSIZE 1024
int Config::LoadConfig() {
	FILE *f = NULL;
	char buffer[BUFSIZE];
	char *val = NULL;
	int i;

	if ((f = fopen (filename.c_str(), "r")) == NULL) {
		return -1;
	}

	while (fgets(buffer, BUFSIZE, f) != NULL) {
		//
		// check for lenght of buffer
		// find parametername and value
		buffer[BUFSIZE] = '\0';
		i = strlen (buffer);
		if (i > 0) buffer[i-1] = '\0';
		val = strchr(buffer, '=');
		if (val != NULL) {
			*val = '\0';
			val++;
		}
		else continue;

		//
		// copy found value into the Config variables
		if (strncmp (buffer, "FBSH_SAVEPASSWORD", BUFSIZE) == 0)
			savepassword = atoi(val);
		else if (strncmp (buffer, "FBSH_SIDFILE", BUFSIZE) == 0)
			sidfile = val;
		else if (strncmp (buffer, "FBSH_USER", BUFSIZE) == 0)
			username = val;
		else if (strncmp (buffer, "FBSH_PASS", BUFSIZE) == 0)
			password = val;
		else if (strncmp (buffer, "FBSH_HOSTNAME", BUFSIZE) == 0)
			fbhostname = val;
		if (strncmp (buffer, "FBSH_SILENTMODE", BUFSIZE) == 0)
			silent = atoi(val);
	}

	fclose(f);

	return 0;
}


/*
 * save configuration file, it will contains all default parameters and changed
 * parameters given as command line parameter.
 */
int Config::SaveConfig() {
	FILE *f = NULL;

	if ((f = fopen (filename.c_str(), "w")) == NULL) {
		fprintf (stderr, "error on writing config '%s' : %s\n", filename.c_str(),
				strerror(errno));
		return -1;
	}

	fprintf(f, "#\n");
	fprintf(f, "# configfile for fbsh-cli\n");
	fprintf(f, "# PARAMETERNAME=VALUE  no space allowed except for the value.\n");
	fprintf(f, "#                      but not between parametername, = and value.\n");
	fprintf(f, "#\n");
	fprintf(f, "#\n");

	fprintf(f, "FBSH_SAVEPASSWORD=%d\n", savepassword);
	if (savepassword) {
		fprintf(f, "FBSH_USER=%s\n", username.c_str());
		fprintf(f, "FBSH_PASS=%s\n", password.c_str());
	}
	fprintf(f, "FBSH_SIDFILE=%s\n", sidfile.c_str());
	fprintf(f, "FBSH_HOSTNAME=%s\n", fbhostname.c_str());
	fprintf(f, "FBSH_SILENTMODE=%d\n", silent);

	fclose(f);

	return 0;
}