#!/usr/bin/perl

use strict;
use warnings;
use diagnostics;

use C4::InstallAuth;
use CGI qw ( -utf8 );
use POSIX qw(strftime);

use C4::Context;
use C4::Output;
use C4::Templates;
use C4::Languages qw(getAllLanguages getTranslatedLanguages);
use C4::Installer;

use Koha;

my $query = new CGI;
my $step  = $query->param('step');

my $language = $query->param('language');
my ( $template, $loggedinuser, $cookie );

my $all_languages = getAllLanguages();

if ( defined($language) ) {
    C4::Templates::setlanguagecookie( $query, $language, "install.pl?step=1" );
}
( $template, $loggedinuser, $cookie ) = get_template_and_user(
    {
        template_name => "installer/step" . ( $step ? $step : 1 ) . ".tt",
        query         => $query,
        type          => "intranet",
        authnotrequired => 0,
        debug           => 1,
    }
);

my $installer = C4::Installer->new();
my %info;
$info{'dbname'} = C4::Context->config("database");
$info{'dbms'} =
  (   C4::Context->config("db_scheme")
    ? C4::Context->config("db_scheme")
    : "mysql" );
$info{'hostname'} = C4::Context->config("hostname");
$info{'port'}     = C4::Context->config("port");
$info{'user'}     = C4::Context->config("user");
$info{'password'} = C4::Context->config("pass");
my $dbh = DBI->connect(
    "DBI:$info{dbms}:dbname=$info{dbname};host=$info{hostname}"
      . ( $info{port} ? ";port=$info{port}" : "" ),
    $info{'user'}, $info{'password'}
);

if ( $step && $step == 1 ) {
    #First Step (for both fresh installations and upgrades)
    #Checking ALL perl Modules and services needed are installed.
    #Whenever there is an error, adding a report to the page
    my $op = $query->param('op') || 'noop';
    $template->param( language => 1 );
    $template->param( 'checkmodule' => 1 ); # we start with the assumption that there are no problems and set this to 0 if there are

    unless ( $] >= 5.010000 ) {    # Bug 7375
        $template->param( problems => 1, perlversion => 1, checkmodule => 0 );
    }

    my $perl_modules = C4::Installer::PerlModules->new;
    $perl_modules->version_info;

    my $modules = $perl_modules->get_attr('missing_pm');
    if (scalar(@$modules)) {
        my @components = ();
        my $checkmodule = 1;
        foreach (@$modules) {
            my ($module, $stats) = each %$_;
            $checkmodule = 0 if $stats->{'required'};
            push(
                @components,
                {
                    name    => $module,
                    version => $stats->{'min_ver'},
                    require => $stats->{'required'},
                    usage   => $stats->{'usage'},
                }
            );
        }
        @components = sort {$a->{'name'} cmp $b->{'name'}} @components;
        $template->param( missing_modules => \@components, checkmodule => $checkmodule, op => $op );
    }
}
elsif ( $step && $step == 2 ) {
#
#STEP 2 Check Database connection and access
#
    $template->param(%info);
    my $checkdb = $query->param("checkdb");
    $template->param( 'dbconnection' => $checkdb );
    if ($checkdb) {
        if ($dbh) {

            # Can connect to the mysql
            $template->param( "checkdatabaseaccess" => 1 );
            if ( $info{dbms} eq "mysql" ) {

                #Check if database created
                my $rv = $dbh->do("SHOW DATABASES LIKE \'$info{dbname}\'");
                if ( $rv == 1 ) {
                    $template->param( 'checkdatabasecreated' => 1 );
                }

                #Check if user have all necessary grants on this database.
                my $rq =
                  $dbh->prepare(
                    "SHOW GRANTS FOR \'$info{user}\'\@'$info{hostname}'");
                $rq->execute;
                my $grantaccess;
                while ( my ($line) = $rq->fetchrow ) {
                    my $dbname = $info{dbname};
                    if ( $line =~ m/^GRANT (.*?) ON `$dbname`\.\*/ || index( $line, '*.*' ) > 0 ) {
                        $grantaccess = 1
                          if (
                            index( $line, 'ALL PRIVILEGES' ) > 0
                            || (   ( index( $line, 'SELECT' ) > 0 )
                                && ( index( $line, 'INSERT' ) > 0 )
                                && ( index( $line, 'UPDATE' ) > 0 )
                                && ( index( $line, 'DELETE' ) > 0 )
                                && ( index( $line, 'CREATE' ) > 0 )
                                && ( index( $line, 'DROP' ) > 0 ) )
                          );
                    }
                }
                unless ($grantaccess) {
                    $rq =
                      $dbh->prepare("SHOW GRANTS FOR \'$info{user}\'\@'\%'");
                    $rq->execute;
                    while ( my ($line) = $rq->fetchrow ) {
                        my $dbname = $info{dbname};
                        if ( $line =~ m/$dbname/ || index( $line, '*.*' ) > 0 )
                        {
                            $grantaccess = 1
                              if (
                                index( $line, 'ALL PRIVILEGES' ) > 0
                                || (   ( index( $line, 'SELECT' ) > 0 )
                                    && ( index( $line, 'INSERT' ) > 0 )
                                    && ( index( $line, 'UPDATE' ) > 0 )
                                    && ( index( $line, 'DELETE' ) > 0 )
                                    && ( index( $line, 'CREATE' ) > 0 )
                                    && ( index( $line, 'DROP' ) > 0 ) )
                              );
                        }
                    }
                }
                $template->param( "checkgrantaccess" => $grantaccess );
            }	# End mysql connect check...

	    elsif ( $info{dbms} eq "Pg" ) {
		# Check if database has been created...
		my $rv = $dbh->do( "SELECT * FROM pg_catalog.pg_database WHERE datname = \'$info{dbname}\';" );
		if ( $rv == 1 )	{
			$template->param( 'checkdatabasecreated' => 1 );
		}

		# Check if user has all necessary grants on this database...
		my $rq = $dbh->do( "SELECT u.usesuper
				    FROM pg_catalog.pg_user as u
				    WHERE u.usename = \'$info{user}\';" );
		if ( $rq == 1 ) {
			$template->param( "checkgrantaccess" => 1 );
		}
            }	# End Pg connect check...
        }
        else {
            $template->param( "error" => DBI::err, "message" => DBI::errstr );
        }
    }
}
elsif ( $step && $step == 3 ) {
#
#
# STEP 3 : database setup
#
#
    my $op = $query->param('op');
    if ( $op && $op eq 'finished' ) {
        #
        # we have finished, just redirect to mainpage.
        #
        print $query->redirect("/cgi-bin/koha/mainpage.pl");
        exit;
    }
    elsif ( $op && $op eq 'finish' ) {
        $installer->set_version_syspref();

        # Installation is finished.
        # We just deny anybody access to install
        # And we redirect people to mainpage.
        # The installer will have to relogin since we do not pass cookie to redirection.
        $template->param( "$op" => 1 );
    }
    elsif ( $op && $op eq 'addframeworks' ) {
    #
    # 1ST install, 3rd sub-step : insert the SQL files the user has selected
    #

        my ($fwk_language, $list) = $installer->load_sql_in_order($all_languages, $query->param('framework'));
        $template->param(
            "fwklanguage" => $fwk_language,
            "list"        => $list
        );
        $template->param( "$op" => 1 );
    }
    elsif ( $op && $op eq 'selectframeworks' ) {
        #
        #
        # 1ST install, 2nd sub-step : show the user the sql datas he can insert in the database.
        #
        #
        # (note that the term "selectframeworks is not correct. The user can select various files, not only frameworks)

        #Framework Selection
        #sql data for import are supposed to be located in installer/data/<language>/<level>
        # Where <language> is en|fr or any international abbreviation (provided language hash is updated... This will be a problem with internationlisation.)
        # Where <level> is a category of requirement : required, recommended optional
        # level should contain :
        #   SQL File for import With a readable name.
        #   txt File that explains what this SQL File is meant for.
        # Could be VERY useful to have A Big file for a kind of library.
        # But could also be useful to have some Authorised values data set prepared here.
        # Framework Selection is achieved through checking boxes.
        my $langchoice = $query->param('fwklanguage');
        $langchoice = $query->cookie('KohaOpacLanguage') unless ($langchoice);
	$langchoice =~ s/[^a-zA-Z_-]*//g;
        my $marcflavour = $query->param('marcflavour');
        if ($marcflavour){
            $installer->set_marcflavour_syspref($marcflavour);
        };
        $marcflavour = C4::Context->preference('marcflavour') unless ($marcflavour);
        #Insert into database the selected marcflavour
        undef $/;
        my ($marc_defaulted_to_en, $fwklist) = $installer->marc_framework_sql_list($langchoice, $marcflavour);
        $template->param('en_marc_frameworks' => $marc_defaulted_to_en);
        $template->param( "frameworksloop" => $fwklist );
        $template->param( "marcflavour" => ucfirst($marcflavour));

        my ($sample_defaulted_to_en, $levellist) = $installer->sample_data_sql_list($langchoice);
        $template->param( "en_sample_data" => $sample_defaulted_to_en);
        $template->param( "levelloop" => $levellist );
        $template->param( "$op"       => 1 );
    }
    elsif ( $op && $op eq 'choosemarc' ) {
        #
        #
        # 1ST install, 2nd sub-step : show the user the marcflavour available.
        #
        #

        #Choose Marc Flavour
        #sql data are supposed to be located in installer/data/<dbms>/<language>/marcflavour/marcflavourname
	# Where <dbms> is database type according to DBD syntax
        # Where <language> is en|fr or any international abbreviation (provided language hash is updated... This will be a problem with internationlisation.)
        # Where <level> is a category of requirement : required, recommended optional
        # level should contain :
        #   SQL File for import With a readable name.
        #   txt File taht explains what this SQL File is meant for.
        # Could be VERY useful to have A Big file for a kind of library.
        # But could also be useful to have some Authorised values data set prepared here.
        # Marcflavour Selection is achieved through radiobuttons.
        my $langchoice = $query->param('fwklanguage');
        $langchoice = $query->cookie('KohaOpacLanguage') unless ($langchoice);
	$langchoice =~ s/[^a-zA-Z_-]*//g;
        my $dir =
          C4::Context->config('intranetdir') . "/installer/data/$info{dbms}/$langchoice/marcflavour";
        unless (opendir( MYDIR, $dir )) {
            if ($langchoice eq 'en') {
                warn "cannot open MARC frameworks directory $dir";
            } else {
                # if no translated MARC framework is available,
                # default to English
                $dir = C4::Context->config('intranetdir') . "/installer/data/$info{dbms}/en/marcflavour";
                opendir(MYDIR, $dir) or warn "cannot open English MARC frameworks directory $dir";
            }
        }
        my @listdir = grep { !/^\./ && -d "$dir/$_" } readdir(MYDIR);
        closedir MYDIR;
        my $marcflavour=C4::Context->preference("marcflavour");
        my @flavourlist;
        foreach my $marc (@listdir) {
            my %cell=(
            "label"=> ucfirst($marc),
            "code"=>uc($marc),
            "checked"=> defined($marcflavour) ? uc($marc) eq $marcflavour : 0);
#             $cell{"description"}= do { local $/ = undef; open INPUT "<$dir/$marc.txt"||"";<INPUT> };
            push @flavourlist, \%cell;
        }
        $template->param( "flavourloop" => \@flavourlist );
        $template->param( "$op"       => 1 );
    }
    elsif ( $op && $op eq 'importdatastructure' ) {
        #
        #
        # 1st install, 1st "sub-step" : import kohastructure
        #
        #
        my $error = $installer->load_db_schema();
        $template->param(
            "error" => $error,
            "$op"   => 1,
        );
    }
    elsif ( $op && $op eq 'updatestructure' ) {
        #
        # Not 1st install, the only sub-step : update database
        #
        #Do updatedatabase And report

        if ( ! defined $ENV{PERL5LIB} ) {
            my $find = "C4/Context.pm";
            my $path = $INC{$find};
            $path =~ s/\Q$find\E//;
            $ENV{PERL5LIB} = "$path:$path/installer";
            warn "# plack? inserted PERL5LIB $ENV{PERL5LIB}\n";
        }

        my $now = POSIX::strftime( "%Y-%m-%dT%H:%M:%S", localtime() );
        my $logdir = C4::Context->config('logdir');
        my $dbversion = C4::Context->preference('Version');
        my $kohaversion = C4::Context->KOHAVERSION;
        $kohaversion =~ s/(.*\..*)\.(.*)\.(.*)/$1$2$3/;

        my $filename_suffix = join '_', $now, $dbversion, $kohaversion;
        my ( $logfilepath, $logfilepath_errors ) = ( chk_log($logdir, "updatedatabase_$filename_suffix"), chk_log($logdir, "updatedatabase-error_$filename_suffix") );

        my $cmd = C4::Context->config("intranetdir") . "/installer/data/$info{dbms}/updatedatabase.pl >> $logfilepath 2>> $logfilepath_errors";

        system($cmd );

        my $fh;
        open( $fh, "<", $logfilepath ) or die "Cannot open log file $logfilepath: $!";
        my @report = <$fh>;
        close $fh;
        if (@report) {
            $template->param( update_report => [ map { { line => $_ } } split( /\n/, join( '', @report ) ) ] );
            $template->param( has_update_succeeds => 1 );
        } else {
            eval{ `rm $logfilepath` };
        }
        open( $fh, "<", $logfilepath_errors ) or die "Cannot open log file $logfilepath_errors: $!";
        @report = <$fh>;
        close $fh;
        if (@report) {
            $template->param( update_errors => [ map { { line => $_ } } split( /\n/, join( '', @report ) ) ] );
            $template->param( has_update_errors => 1 );
            warn "The following errors were returned while attempting to run the updatedatabase.pl script:\n";
            foreach my $line (@report) { warn "$line\n"; }
        } else {
            eval{ `rm $logfilepath_errors` };
        }
        $template->param( $op => 1 );
    }
    else {
        #
        # check whether it's a 1st install or an update
        #
        #Check if there are enough tables.
        # Paul has cleaned up tables so reduced the count
        #I put it there because it implied a data import if condition was not satisfied.
        my $dbh = DBI->connect(
    		"DBI:$info{dbms}:dbname=$info{dbname};host=$info{hostname}"
      		. ( $info{port} ? ";port=$info{port}" : "" ),
            	$info{'user'}, $info{'password'}
        );
	my $rq;
        if ( $info{dbms} eq 'mysql' ) { $rq = $dbh->prepare( "SHOW TABLES" ); }
	elsif ( $info{dbms} eq 'Pg' ) { $rq = $dbh->prepare( "SELECT *
								FROM information_schema.tables
								WHERE table_schema='public' and table_type='BASE TABLE';" ); }
        $rq->execute;
        my $data = $rq->fetchall_arrayref( {} );
        my $count = scalar(@$data);
        #
        # we don't have tables, propose DB import
        #
        if ( $count < 70 ) {
            $template->param( "count" => $count, "proposeimport" => 1 );
        }
        else {
            #
            # we have tables, propose to select files to upload or updatedatabase
            #
            $template->param( "count" => $count, "default" => 1 );
            #
            # 1st part of step 3 : check if there is a databaseversion systempreference
            # if there is, then we just need to upgrade
            # if there is none, then we need to install the database
            #
            if (C4::Context->preference('Version')) {
                my $dbversion = C4::Context->preference('Version');
                $dbversion =~ /(.*)\.(..)(..)(...)/;
                $dbversion = "$1.$2.$3.$4";
                $template->param("upgrading" => 1,
                                "dbversion" => $dbversion,
                                "kohaversion" => Koha::version(),
                                );
            }
        }
    }
}
else {

    # LANGUAGE SELECTION page by default
    # using opendir + language Hash
    my $languages_loop = getTranslatedLanguages('intranet');
    $template->param( installer_languages_loop => $languages_loop );
    if ($dbh) {
        my $rq =
          $dbh->prepare(
            "SELECT * from systempreferences WHERE variable='Version'");
        if ( $rq->execute ) {
            my ($version) = $rq->fetchrow;
            if ($version) {
                print $query->redirect("/cgi-bin/koha/installer/install.pl?step=3");
                exit;
            }
        }
    }
}
output_html_with_http_headers $query, $cookie, $template->output;

sub chk_log { #returns a logfile in $dir or - if that failed - in temp dir
    my ($dir, $name) = @_;
    my $fn=$dir.'/'.$name.'.log';
    if( ! open my $fh, '>', $fn ) {
        $name.= '_XXXX';
        require File::Temp;
        ($fh, $fn)= File::Temp::tempfile( $name, TMPDIR => 1, SUFFIX => '.log');
        #if this should not work, let croak take over
    }
    return $fn;
}