//
// Created by Antoine Bartuccio on 05/06/2018.
//

#include <string.h>
#include "Elevator.h"
#include "../SharedData/SharedData.h"

SYNCHRONIZED_GETTER(Elevator, ELEVATOR_STATE, state)
SYNCHRONIZED_SETTER(Elevator, ELEVATOR_STATE, state)
SYNCHRONIZED_GETTER(Elevator, int, floor)
SYNCHRONIZED_SETTER(Elevator, int, floor)

void _free__Elevator(THIS(Elevator)){
	DELETE(this->passengers);
	if (this->name != NULL)
		free(this->name);

	pthread_mutex_unlock(&this->mutex_passenger);
	pthread_mutex_destroy(&this->mutex_passenger);

	pthread_mutex_unlock(&this->mutex_state);
	pthread_mutex_destroy(&this->mutex_state);

	pthread_mutex_unlock(&this->mutex_floor);
	pthread_mutex_destroy(&this->mutex_floor);

	free(this);
}

void add_passenger_Elevator(THIS(Elevator), Passenger passenger){
	pthread_mutex_lock(&this->mutex_passenger);
	this->passengers->insert_tail(this->passengers, ((void *)&passenger), sizeof(Passenger));
	printf("L'ascenseur %s recoit le visiteur %s\nIl y a maintenant %d passagers dans l'ascenseur %s\n", this->name,
		   passenger.type == VISITOR ? passenger.visitor->get_name(passenger.visitor) : passenger.resident->get_name(passenger.resident),
		   this->passengers->get_size(this->passengers), this->name);
	if (this->passengers->get_size(this->passengers) >= MAX_ELEVATOR_CAPACITY)
		this->set_state(this, SLEEPING);
	pthread_mutex_unlock(&this->mutex_passenger);
}

int get_number_of_passengers_Elevator(THIS(Elevator)){
	int num;
	pthread_mutex_lock(&this->mutex_passenger);
	num = this->passengers->get_size(this->passengers);
	pthread_mutex_unlock(&this->mutex_passenger);
	return num;
}

int can_get_inside_Elevator(THIS(Elevator), int floor){
	int permission;
	pthread_mutex_lock(&this->mutex_passenger);
	pthread_mutex_lock(&this->mutex_state);
	pthread_mutex_lock(&this->mutex_floor);

	permission = (this->passengers->get_size(this->passengers) < MAX_ELEVATOR_CAPACITY &&
				  this->state == WAITING && this->floor == floor);

	pthread_mutex_unlock(&this->mutex_floor);
	pthread_mutex_unlock(&this->mutex_state);
	pthread_mutex_unlock(&this->mutex_passenger);

	return permission;
}

void repair_Elevator(THIS(Elevator)){
	this->set_state(this, RUNNING);
}

void *runnable_Elevator(void * void_this){
	/* This is where the thread logic will be implemented */
	Elevator * this = (Elevator*) void_this;
	SharedData * data = GET_INSTANCE(SharedData);

	AGENT_OPTIONS

	printf("Je suis l'ascenseur %s\n", this->name);
	for (;;)
		data->main_building->signal_elevator_at_floor(data->main_building, this->get_floor(this));
	return NULL;
}

Elevator *_init_Elevator(char * name){
	Elevator * new_elevator = malloc_or_die(sizeof(Elevator));
	new_elevator->name = strdup(name);
	new_elevator->passengers = NEW(List);
	pthread_mutex_init(&new_elevator->mutex_passenger, NULL);
	pthread_mutex_init(&new_elevator->mutex_state, NULL);
	pthread_mutex_init(&new_elevator->mutex_floor, NULL);

	LINK_ALL(Elevator, new_elevator,
			 runnable,
			 get_number_of_passengers,
			 can_get_inside,
			 add_passenger,
			 get_state,
			 set_state,
			 get_floor,
			 set_floor,
			 repair
	);

	new_elevator->set_floor(new_elevator, 0);
	new_elevator->set_state(new_elevator, WAITING);

	return new_elevator;
}