/*
 * DeviceConfig.cc
 *
 *  Created on: Dec 9, 2010
 *      Author: lamikr
 */

#include "DeviceConfig.hh"

#include <stdbool.h>
#include <string.h>
#include <malloc.h>

#include "log.h"

#include "DataReader.hh"
#include "FileUtil.hh"

using namespace std;
using namespace plp;

string DeviceConfig::store_base_dir	= DEFAULT_STORAGE_BASE_DIR;

ConfigHandle::ConfigHandle(uci_context *ctx_param, uci_package *pkg_param) {
	_ctx	= ctx_param;
	_pkg	= pkg_param;
}

ConfigHandle::~ConfigHandle() {
	uci_unload(_ctx, _pkg);
	uci_free_context(_ctx);
}

DeviceConfig::DeviceConfig(string device_id_param) {
	device_id	= device_id_param;
	uci_handle	= load_device_config(device_id_param);
	if (uci_handle != NULL) {
		device_type	= get_config_value(DEVICE_CONFIG_VALUE_KEY__TYPE);
	}
	else {
		log_error("Could not read device configuration.\n");
	}
}

DeviceConfig::~DeviceConfig() {
	if (uci_handle != NULL) {
		delete(uci_handle);
		uci_handle	= NULL;
	}
}

void DeviceConfig::set_base_dir_name(string store_param) {
	int	pos;
	int	b_count;

	pos	= store_param.find_last_of("/");
	b_count	= store_param.length();
	if (pos == (b_count - 1)) {
		store_base_dir	= store_param;
	}
	else {
		store_base_dir	= store_param + "/";
	}
}

string DeviceConfig::get_base_dir_name() {
	return store_base_dir;
}

string DeviceConfig::get_dir_name(string device_id_param) {
	string	ret_val;
	string  d_name;

	d_name	= DeviceConfig::get_base_dir_name();
	ret_val	= FileUtil::concat_paths(d_name, device_id_param);
	return ret_val;
}

string DeviceConfig::get_file_name(string device_id_param) {
	string	ret_val;
	string	fname;

	fname	= DEVICE_CONFIG__FILE_NAME;
	ret_val	= get_dir_name(device_id_param);
	ret_val	= FileUtil::concat_paths(ret_val, fname);
	return ret_val;
}

string DeviceConfig::get_config_value(string key) {
	struct uci_section	*section;
	struct uci_option	*option;
	string			ret_val;

	if (uci_handle != NULL) {
		section	= uci_lookup_section(uci_handle->_ctx, uci_handle->_pkg, DEVICE_CONFIG__SECTION_NAME);
		if (section != NULL) {
			option	= uci_lookup_option(uci_handle->_ctx, section, key.c_str());
			if (option != NULL) {
				switch (option->type) {
					case UCI_TYPE_STRING:
						//log_info("key: %s option name: %s, value: %s\n", key.c_str(), option->e.name, option->v.string);
						ret_val	= option->v.string;
						break;
					default:
						log_error("key: %s Failed to read parameter value\n", key.c_str());
						break;
				}
			}
			else {
				log_error("key: %s Failed to read parameter value\n", key.c_str());
			}
		}
	}
	return ret_val;
}

void DeviceConfig::set_config_value(string key,
				string value,
				bool save_immediately) {
	string	cfg_dir;
	string	cfg_fl;

	cfg_dir	= get_dir_name(device_id);
	cfg_fl	= DEVICE_CONFIG__FILE_NAME;
	set_config_value_to_section(cfg_dir.c_str(),
			cfg_fl.c_str(),
			DEVICE_CONFIG__SECTION_TYPE,
			DEVICE_CONFIG__SECTION_NAME,
			key.c_str(),
			value.c_str(),
			save_immediately);
}

EnumSummaryCalculationType DeviceConfig::get_summary_calculation_type() {
	EnumSummaryCalculationType	ret_val;

	ret_val	= MEAN;
	if (device_type.empty() == false) {
		if (device_type.compare("Counter Device") == 0) {
			ret_val	= DELTA;
		}
	}
	return ret_val;;
}

ConfigHandle *DeviceConfig::load_device_config(string device_id_param) {
	int			err_flg;
	struct uci_context	*ctx;
	struct uci_package 	*pkg;
	string			cfg_fl;
	string 			cfg_dir;
	ConfigHandle		*ret_val;

	ret_val	= NULL;
	cfg_dir	= get_dir_name(device_id_param);
	if (cfg_dir.empty() == false) {
		if (access(cfg_dir.c_str(), W_OK) != 0) {
			FileUtil::mkdirs(cfg_dir.c_str());
		}
		cfg_fl	= get_file_name(device_id_param);
		if (access(cfg_fl.c_str(), R_OK) == 0) {
			ctx	= uci_alloc_context();
			if (ctx != NULL) {
				//log_debug("uci_set_confdir: %s\n", cfg_dir.c_str());
				uci_set_confdir(ctx, cfg_dir.c_str());
				err_flg	= uci_load(ctx, cfg_fl.c_str(), &pkg);
				if (err_flg == UCI_OK) {
					//log_debug("Loaded device configuration: %s.\n", cfg_fl.c_str());
					ret_val	= new ConfigHandle(ctx, pkg);
				}
				else {
					log_debug("Failed to load device configuration: %s, err code: %d.\n", cfg_fl.c_str(), UCI_OK);
					set_config_value(DEVICE_CONFIG_VALUE_KEY__TYPE, "", true);
					uci_free_context(ctx);
				}
			}
			else {
				log_error("Failed to load device device configuration, memory allocation error.\n");
				set_config_value(DEVICE_CONFIG_VALUE_KEY__TYPE, "", true);
			}
		}
		else {
			log_error("Failed to load device device configuration, file does not exist: %s.\n", cfg_fl.c_str());
		}
	}
	return ret_val;
}

DeviceConfig *DeviceConfig::get_device_config(string device_id) {
	DeviceConfig	*ret_val;

	ret_val	= new DeviceConfig(device_id);
	return ret_val;
}