#include "philo.h"

static void	action_delay(t_philo *philo, int action_time)
{
	struct timeval	stime;
	int				death_time;

	gettimeofday(&stime, NULL);
	death_time = philo->params->t_die - diff_time(philo, &stime);
	if (death_time > action_time)
		usleep(action_time * 1000);
	else if (death_time > 0)
		usleep(philo->params->t_die * 1000);
}

static int	ret_err_unlock(t_mtx *fork1, t_mtx *fork2)
{
	if (fork2)
		pthread_mutex_unlock(fork2);
	if (fork1)
		pthread_mutex_unlock(fork1);
	return (1);
}

static int	eat(t_philo *philo, t_mtx *fork1, t_mtx *fork2)
{
	pthread_mutex_lock(fork1);
	if (print_message(philo, WHITE, "has taken a fork"))
		return (ret_err_unlock(fork1, NULL));
	if (fork1 == fork2)
		return (ret_err_unlock(fork1, NULL));
	pthread_mutex_lock(fork2);
	if (print_message(philo, WHITE, "has taken a fork"))
		return (ret_err_unlock(fork1, fork2));
	update_time(philo);
	if (print_message(philo, B_YELLOW, "is eating"))
		return (ret_err_unlock(fork1, fork2));

	action_delay(philo, philo->params->t_eat);
	pthread_mutex_lock(&(philo->m_eat));
	philo->eat_count++;
	pthread_mutex_unlock(&(philo->m_eat));
	pthread_mutex_unlock(fork2);
	pthread_mutex_unlock(fork1);
	return (0);
}

/*
**	fork1 = &(philo->m_fork);
**	fork2 = &(philo->m_fork);
**	if (philo->global->t_start.ts == 0)
**	if (philo->p_nbr < philo->params->n_phi / 2)
**	if (philo->p_nbr % 2 == 0)
**		fork1 = &(philo->next->m_fork);
**	else
**		fork2 = &(philo->next->m_fork);
*/
void	*philo_exec(void *arg)
{
	t_philo	*philo;
	t_mtx	*fork1;
	t_mtx	*fork2;

	philo = (t_philo *)arg;
	init_time(philo);
	if (philo->p_nbr % 2 == 0)
		usleep(10 * 1000);
	fork1 = &(philo->m_fork);
	fork2 = &(philo->next->m_fork);
	while (1)
	{
		if (eat(philo, fork1, fork2) != 0)
			break ;
		if (print_message(philo, B_BLUE, "is sleeping"))
			break ;
		action_delay(philo, philo->params->t_slp);
		if (print_message(philo, B_GREEN, "is thinking"))
			break ;
	}
	return (NULL);
}
/*
==22761== Thread #3: lock order "0x54542E8 before 0x54541F8" violated
==22761== 
==22761== Observed (incorrect) order is: acquisition of lock at 0x54541F8
==22761==    at 0x4C3603C: ??? (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
==22761==    by 0x4011BC: eat (exec.c:27)
==22761==    by 0x401119: philo_exec (exec.c:72)
==22761==    by 0x4C38C26: ??? (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
==22761==    by 0x4E4B6DA: start_thread (pthread_create.c:463)
==22761==    by 0x518471E: clone (clone.S:95)
==22761== 
==22761==  followed by a later acquisition of lock at 0x54542E8
==22761==    at 0x4C3603C: ??? (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
==22761==    by 0x401226: eat (exec.c:32)
==22761==    by 0x401119: philo_exec (exec.c:72)
==22761==    by 0x4C38C26: ??? (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
==22761==    by 0x4E4B6DA: start_thread (pthread_create.c:463)
==22761==    by 0x518471E: clone (clone.S:95)
*/