#!/usr/bin/perl

#
# Copyright (C) Roman Dmitiriev, rnd@rajven.ru
#

use utf8;
use Encode;
no warnings 'utf8';
use open ':encoding(utf-8)';

use FindBin '$Bin';
use lib "/opt/Eye/scripts";
use eyelib::config;
use eyelib::main;
use eyelib::database;
use eyelib::common;
use Data::Dumper;
use strict;
use warnings;

STDOUT->autoflush(1);

my $update_dir = '/opt/Eye/scripts/updates/';

opendir(my $dh, $update_dir) or die "Eror listing for $update_dir: $!";
my @old_releases = sort grep { -d "$update_dir/$_" && !/^\.\.?$/ && /^\d/ } readdir($dh);
closedir $dh;

s/-/./g for @old_releases;

my $r_index = 0;
my %old_releases_h = map {$_ => $r_index++ } @old_releases;
my $eye_release = $old_releases[@old_releases - 1];

$dbh=init_db();
init_option($dbh);

if (!$config_ref{version} and !$ARGV[0]) {
    print "Current version unknown! Skip upgrade!\n";
    exit 100;
    }

if ($ARGV[0]) {
    if (exists($old_releases_h{$ARGV[0]})) { $config_ref{version}=$ARGV[0]; } else { print "Unknown version $ARGV[0]!\n"; }
    }

if (!exists($old_releases_h{$config_ref{version}})) { print "Unknown version $config_ref{version}!\n"; exit 100; }

if ($eye_release eq $config_ref{version}) { print "Already updated!\n"; exit; }

print 'Current version: '.$config_ref{version}.' upgrade to: '.$eye_release."\n";

#1 - mysql
#0 - pgsql
my $db_type = ($config_ref{DBTYPE} eq 'mysql');

my $old_version_index = $old_releases_h{$config_ref{version}} + 1;
my $stage = 1;

for (my $i=$old_version_index; $i < scalar @old_releases; $i++) {
    print "Stage $stage. Upgrade to $old_releases[$i]\n";
    $stage++;
    my $dir_name = $old_releases[$i];
    $dir_name =~s/\./-/g;
    next if (! -d $dir_name);
    #patch before change database schema
    my @perl_patches = glob($dir_name.'/before*.pl');
    if (@perl_patches and scalar @perl_patches) {
        foreach my $patch (@perl_patches) {
            next if (!$patch or ! -e $patch);
            open(my $pipe, "-|", "perl $patch") or die "Error in apply upgrade script $patch! Ошибка: $!";
            while (my $line = <$pipe>) { 
                if ($line =~ /::/) { print "\r"; $line =~s/\:\://; }
                print $line; 
                }
            close($pipe);
            }
        }
    #change database schema
    my @sql_patches;
    if ($db_type) {
        my @sql_patches1 = glob($dir_name.'/*.sql');
        my @sql_patches2 = glob($dir_name.'/*.msql');
        push(@sql_patches,@sql_patches1);
        push(@sql_patches,@sql_patches2);
        } else {
        @sql_patches = glob($dir_name.'/*.psql');
        }
    if (@sql_patches and scalar @sql_patches) {
        my @sorted_patches = sort @sql_patches;
        my $i = 0;
        while ($i < @sorted_patches) {
            my $patch = $sorted_patches[$i];
            $i++;
            eval {
                next if (!$patch or ! -e $patch);
                next if ($patch =~ /version\.sql/);
                my @sql_cmd = read_file($patch);
                my $j = 0;
                while ($j < @sql_cmd) {
                    my $sql = $sql_cmd[$j];
                    $j++;
                    next if ($sql =~ /^(--|#)/);
                    next if (!$sql);
                    my $sql_prep = $dbh->prepare($sql);
                    if (!$sql_prep) {
                        warn "Unable to prepare SQL: $sql\nError: " . $dbh->errstr . "\n";
                        next;
                    }
                    my $rv = $sql_prep->execute();
                    if (!$rv) {
                        warn "Unable to execute SQL: $sql\nError: " . $dbh->errstr . "\n";
                    }
                    $sql_prep->finish();
                }
            };
            if ($@) {
                chomp $@;
                print STDERR "Error processing patch '$patch': $@\n";
            }
        }
    }
    #patch after change database schema
    @perl_patches = glob($dir_name.'/after*.pl');
    if (@perl_patches and scalar @perl_patches) {
        foreach my $patch (@perl_patches) {
            next if (!$patch or ! -e $patch);
            open(my $pipe, "-|", "perl $patch") or die "Error in apply upgrade script $patch! Ошибка: $!";
            while (my $line = <$pipe>) {
                if ($line =~ /::/) { print "\r"; $line =~s/\:\://; }
                print $line; 
                }
            close($pipe);
            }
        }
    #change version
    do_sql($dbh,'UPDATE version SET version="'.$old_releases[$i].'"');
}

print "Done!\n";

exit;