/*
 * Copyright (C) 2015, 2016 "IoT.bzh"
 * Author "Romain Forlot" <romain.forlot@iot.bzh>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *	 http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <map>
#include <fnmatch.h>

#include "active-diagnostic-request.hpp"

#include "../binding/configuration.hpp"

#define ERROR_PID 0xFF

std::string active_diagnostic_request_t::prefix_ = "diagnostic_messages";

bool active_diagnostic_request_t::operator==(const active_diagnostic_request_t& b)
{
	return (bus_ == b.bus_ && id_ == b.id_ && handle_ == b.handle_);
}

active_diagnostic_request_t& active_diagnostic_request_t::operator=(const active_diagnostic_request_t& adr)
{
	if (this != &adr)
	{
		bus_ = adr.bus_;
		id_ = adr.id_;
		handle_ = adr.handle_;
		name_ = adr.name_;
		decoder_ = adr.decoder_;
		callback_ = adr.callback_;
		recurring_ = adr.recurring_; 
		wait_for_multiple_responses_ = adr.wait_for_multiple_responses_;
		frequency_clock_ = adr.frequency_clock_;
		timeout_clock_ = adr.timeout_clock_;
		socket_ = adr.socket_;
	}
	
	return *this;
}

active_diagnostic_request_t::active_diagnostic_request_t()
	: bus_{nullptr},
	  id_{0},
	  handle_{nullptr},
	  name_{""},
	  decoder_{nullptr},
	  callback_{nullptr},
	  recurring_{false},
	  wait_for_multiple_responses_{false},
	  frequency_clock_{frequency_clock_t()},
	  timeout_clock_{frequency_clock_t()}
{}

active_diagnostic_request_t::active_diagnostic_request_t(const std::string& bus, DiagnosticRequest* request,
		const std::string& name,
		bool wait_for_multiple_responses,
		const DiagnosticResponseDecoder decoder,
		const DiagnosticResponseCallback callback,
		float frequencyHz)
	: bus_{bus},
	  id_{request->arbitration_id},
	  handle_{nullptr},
	  name_{name},
	  decoder_{decoder},
	  callback_{callback},
	  recurring_{frequencyHz ? true : false},
	  wait_for_multiple_responses_{wait_for_multiple_responses},
	  frequency_clock_{frequency_clock_t(frequencyHz)},
	  timeout_clock_{frequency_clock_t(10)}
{}

uint32_t active_diagnostic_request_t::get_id() const
{
	return id_;
}

uint16_t active_diagnostic_request_t::get_pid() const
{
	if (handle_->request.has_pid)
		return handle_->request.pid;
	return ERROR_PID;
}

DiagnosticRequestHandle* active_diagnostic_request_t::get_handle()
{
	return handle_;
}

const std::string active_diagnostic_request_t::get_name() const
{
	return name_;
}

std::string& active_diagnostic_request_t::get_prefix()
{
	return active_diagnostic_request_t::prefix_;
}

DiagnosticResponseDecoder& active_diagnostic_request_t::get_decoder()
{
	return decoder_;
}

DiagnosticResponseCallback& active_diagnostic_request_t::get_callback()
{
	return callback_;
}

bool active_diagnostic_request_t::get_recurring() const
{
	return recurring_;
}

frequency_clock_t& active_diagnostic_request_t::get_frequency_clock()
{
	return frequency_clock_;
}

frequency_clock_t& active_diagnostic_request_t::get_timeout_clock()
{
	return timeout_clock_;
}

utils::socketcan_bcm_t& active_diagnostic_request_t::get_socket()
{
	return socket_;
}

void active_diagnostic_request_t::set_handle(DiagnosticShims& shims, DiagnosticRequest* request)
{
	handle_ = new DiagnosticRequestHandle(generate_diagnostic_request(&shims, request, nullptr));
}

///
/// @brief Check if requested signal name is a diagnostic message. If the name
///  begin with the diagnostic message prefix then true else false.
///
/// @param[in] name - A signal name.
///
/// @return true if name began with the diagnostic message prefix else false.
///
bool active_diagnostic_request_t::is_diagnostic_signal(const std::string& name)
{
	const std::string p = active_diagnostic_request_t::prefix_ + "*";
	if(::fnmatch(p.c_str(), name.c_str(), FNM_CASEFOLD) == 0)
		return true;
	return false;
}

/// @brief Returns true if a sufficient response has been received for a
/// diagnostic request.
///
/// This is true when at least one response has been received and the request is
/// configured to not wait for multiple responses. Functional broadcast requests
/// may often wish to wait the full 100ms for modules to respond.
bool active_diagnostic_request_t::response_received() const
{
	return !wait_for_multiple_responses_ &&
				handle_->completed && handle_->success;
}