#!/usr/bin/env perl

use strict;
use warnings;
use v5.10;
use DateTime::Format::ISO8601;
use File::Basename;
use Net::IP;
use POSIX qw(strftime);
use Socket;
use utf8;

use ACU::API::Projects;
use ACU::API::Submission;
use ACU::LDAP;
use ACU::Log;
$ACU::Log::log_file = "/var/log/hooks/" . basename($0) . ".log";
use ACU::Process;

my ($ref, $oldsha, $newsha) = @ARGV;

my $promo;
my $id_project;
my $repo_login;

my @apping = qw(zinger_a zebard_w zanell_a yao_p vinois_a sraka_y soupam_j seck_a ngomsi_s morin_h milis_e menkar_m eusebe_r crief_a chhum_s boumra_n blemus_a bengan_l amasho_a);
my @salonD = qw(aniss_i bogalh_j boulea_b cloare_l elhach_h gabrie_j kaplan_p manuel_c palson_c pizzin_a wajntr_a);
my @salonS = qw(allio_a cadet_l digius_p drouin_n dubois_d dupuis_a langre_m lim_j);

# First, extract information, from config then guess from repository adress
if (my $tmp = `git config hooks.promo`) { chomp $tmp; $promo = $tmp; }
if (my $tmp = `git config hooks.idproject`) { chomp $tmp; $id_project = $tmp; }
if (my $tmp = `git config hooks.login`) { chomp $tmp; $repo_login = $tmp; }

$promo = $1 if (!$promo && $ENV{'GL_REPO'} =~ m/([0-9]{4}).*/);
$id_project = $1 if (!$id_project && $ENV{'GL_REPO'} =~ m/.*\/(.*)\//);
$repo_login = $1 if (!$repo_login && $ENV{'GL_REPO'} =~ m/.*\/.*\/(.*)/);

exit(0) if (!$promo || !$id_project || !$repo_login);

if ($ref =~ m<^refs/tags/ACU-(.+)$>)
{
    my $tag = $1;
    log DEBUG, "Pushed tag for repository $ENV{GL_REPO}: $tag with IP $ENV{'SSH_CLIENT'}";

    # Disallow no ACU
    if ($ENV{GL_USER} ne "frotti_b" && $ENV{GL_USER} ne "chen_a" && $ENV{GL_USER} ne "boisse_r" && $ENV{GL_USER} ne "genite_n" && $ENV{GL_USER} ne "mercie_d")
    {
	log ERROR, "Vous n'êtes pas autorisé à envoyer ce tag.";
	exit(9);
    }

    my $project = get_project_info($tag);

    # Extract matching tag
    my @rendus = grep {
	exists $_->{vcs} and $_->{vcs}{tag} eq $tag;
    } @{ $project->{submissions} };

    if (! @rendus)
    {
	log ERROR, "$tag n'est pas un tag valide.";
	exit(8);
    }
}
elsif ($ref =~ m<^refs/tags/(.+)$>)
{
    my $tag = $1;
    log DEBUG, "Pushed tag for repository $ENV{GL_REPO}: $tag with IP $ENV{'SSH_CLIENT'}";

    my $project = get_project_info($tag);

    # Extract matching tag
    my @rendus = grep {
	exists $_->{vcs} and $_->{vcs}{tag} eq $tag;
    } @{ $project->{submissions} };

    if (@rendus)
    {
	if ($newsha eq '0' x 40)
	{
	    log USAGE, "Mais pour quelle raison voudriez-vous supprimer un tag ?!";
	    exit(7);
	}

	chomp (my $tokengiven = `git cat-file tag $newsha 2> /dev/null | sed -e '1,/^\$/d'`);
	if (! check_submission_date($tokengiven, @rendus))
	{
	    exit (9);
	}
    }
    else
    {
	log ERROR, "$tag n'est pas un tag valide.";
	exit(8)
    }
}

exit 0;

sub get_project_info
{
    my $project;
    eval {
	$project = API::Projects::get($id_project, $promo);
    };
    if ($@ or !$project)
    {
	my $err = $@;
	log TRACE, $err;
	log ERROR, "Impossible d'envoyer de tags ; si le problème persiste, passez au laboratoire.";
	exit(1);
    }

    log TRACE, $project;

    return $project;
}

sub check_submission_date
{
    my $tokengiven = shift;

    my $glts = DateTime::Format::ISO8601->parse_datetime(
	do {
	    my $t = $ENV{'GL_TS'};
	    $t =~ tr/./T/;
	    $t
	});

    for my $rendu (@_)
    {
	my $open = DateTime::Format::ISO8601->parse_datetime($rendu->{period}{begin});
	my $close = DateTime::Format::ISO8601->parse_datetime($rendu->{period}{end});

#	if ($id_project eq "atelier-cpp-j4" && grep { $_ eq $repo_login } @apping)
	if ($id_project eq "raytracer" && "dubois_d" eq $repo_login)
	{
#	    $open = DateTime::Format::ISO8601->parse_datetime("2013-12-06T00:00:00");
	    $close = DateTime::Format::ISO8601->parse_datetime("2013-12-08T18:42:00");
	}

	say "Date courante : ", $glts->strftime("%d/%m/%Y %H:%M:%S");

	if (DateTime->compare($glts, $open) == -1)
	{
	    say "Date d'ouverture : ", $open->strftime("%d/%m/%Y %H:%M:%S");
	    log ERROR, "Tag rejeté : le rendu n'est pas encore ouvert.";
	    exit(4);
	}

	say "Date de fermeture : ", $close->strftime("%d/%m/%Y %H:%M:%S");

	if (DateTime->compare($glts, $close) == 1)
	{
	    log ERROR, "Tag rejeté : le rendu est clos.";
	    exit(5);
	}

	my $token = $rendu->{vcs}{token};
	if ($token ne "" and $token ne $tokengiven and $newsha ne '0' x 40)
	{
	    log ERROR, "Tag rejeté : mauvais token.";
	    exit(6);
	}
    }

    return 1;
}