# --
# Kernel/System/DB/ingres.pm - ingres database backend
# Copyright (C) 2001-2010 OTRS AG, http://otrs.org/
# --
# $Id: ingres.pm,v 1.4 2010/07/09 17:22:57 ub Exp $
# --
# This software comes with ABSOLUTELY NO WARRANTY. For details, see
# the enclosed file COPYING for license information (AGPL). If you
# did not receive this file, see http://www.gnu.org/licenses/agpl.txt.
# --

package Kernel::System::DB::ingres;

use strict;
use warnings;

use vars qw($VERSION);
$VERSION = qw($Revision: 1.4 $) [1];

sub new {
    my ( $Type, %Param ) = @_;

    # allocate new hash for object
    my $Self = {%Param};
    bless( $Self, $Type );

    return $Self;
}

sub LoadPreferences {
    my ( $Self, %Param ) = @_;

    # db settings
    $Self->{'DB::Limit'}            = 0;
    $Self->{'DB::DirectBlob'}       = 0;
    $Self->{'DB::QuoteSingle'}      = '\'';
    $Self->{'DB::QuoteBack'}        = '';
    $Self->{'DB::QuoteSemicolon'}   = '';
    $Self->{'DB::LikeEscapeString'} = '';
    $Self->{'DB::Attribute'}        = {
        LongReadLen => 20 * 1024 * 1024,
        LongTruncOk => 0,
        AutoCommit  => 1,
    };

    # set current time stamp if different to "current_timestamp"
    $Self->{'DB::CurrentTimestamp'} = 'date(\'now\')';

    # set encoding of selected data to utf8
    $Self->{'DB::Encode'} = 1;

    # shell setting
    $Self->{'DB::Comment'}     = '-- ';
    $Self->{'DB::ShellCommit'} = ';\g';

    #    $Self->{'DB::ShellConnect'} = '';

    return 1;
}

sub Quote {
    my ( $Self, $Text ) = @_;

    if ( defined( ${$Text} ) ) {
        if ( $Self->{'DB::QuoteBack'} ) {
            ${$Text} =~ s/\\/$Self->{'DB::QuoteBack'}\\/g;
        }
        if ( $Self->{'DB::QuoteSingle'} ) {
            ${$Text} =~ s/'/$Self->{'DB::QuoteSingle'}'/g;
        }
        if ( $Self->{'DB::QuoteSemicolon'} ) {
            ${$Text} =~ s/;/$Self->{'DB::QuoteSemicolon'};/g;
        }
    }
    return $Text;
}

sub DatabaseCreate {
    my ( $Self, %Param ) = @_;

    # check needed stuff
    if ( !$Param{Name} ) {
        $Self->{LogObject}->Log( Priority => 'error', Message => "Need Name!" );
        return;
    }

    # return SQL
    #    return ("CREATE DATABASE $Param{Name}");
    return "";
}

sub DatabaseDrop {
    my ( $Self, %Param ) = @_;

    # check needed stuff
    if ( !$Param{Name} ) {
        $Self->{LogObject}->Log( Priority => 'error', Message => "Need Name!" );
        return;
    }

    # return SQL
    #    return ("DROP DATABASE $Param{Name}");
    return "";
}

sub TableCreate {
    my ( $Self, @Param ) = @_;

    my $SQLStart       = '';
    my $SQLEnd         = '';
    my $SQL            = '';
    my @Column         = ();
    my $TableName      = '';
    my $ForeignKey     = ();
    my %Foreign        = ();
    my $IndexCurrent   = ();
    my %Index          = ();
    my $UniqCurrent    = ();
    my %Uniq           = ();
    my $SeqCurrent     = '';
    my @Seq            = ();
    my $PrimaryKey     = '';
    my $PrimKeyColName = '';
    my @Return         = ();
    for my $Tag (@Param) {

        if ( $Tag->{Tag} eq 'Table' && $Tag->{TagType} eq 'Start' ) {
            if ( $Self->{ConfigObject}->Get('Database::ShellOutput') ) {
                $SQLStart .= $Self->{'DB::Comment'}
                    . "----------------------------------------------------------\n";
                $SQLStart .= $Self->{'DB::Comment'} . " create table $Tag->{Name}\n";
                $SQLStart .= $Self->{'DB::Comment'}
                    . "----------------------------------------------------------\n";
            }
        }
        if (
            ( $Tag->{Tag} eq 'Table' || $Tag->{Tag} eq 'TableCreate' )
            && $Tag->{TagType} eq 'Start'
            )
        {
            $SQLStart .= "CREATE TABLE $Tag->{Name} (\n";
            $TableName = $Tag->{Name};
        }
        if (
            ( $Tag->{Tag} eq 'Table' || $Tag->{Tag} eq 'TableCreate' )
            && $Tag->{TagType} eq 'End'
            )
        {
            $SQLEnd .= ")";
        }
        elsif ( $Tag->{Tag} eq 'Column' && $Tag->{TagType} eq 'Start' ) {
            push( @Column, $Tag );
        }
        elsif ( $Tag->{Tag} eq 'Index' && $Tag->{TagType} eq 'Start' ) {
            $IndexCurrent = $Tag->{Name};
        }
        elsif ( $Tag->{Tag} eq 'IndexColumn' && $Tag->{TagType} eq 'Start' ) {
            push( @{ $Index{$IndexCurrent} }, $Tag );
        }
        elsif ( $Tag->{Tag} eq 'Unique' && $Tag->{TagType} eq 'Start' ) {
            $UniqCurrent = $Tag->{Name} || $TableName . '_U_' . int( rand(999) );
        }
        elsif ( $Tag->{Tag} eq 'UniqueColumn' && $Tag->{TagType} eq 'Start' ) {
            push( @{ $Uniq{$UniqCurrent} }, $Tag );
        }
        elsif ( $Tag->{Tag} eq 'ForeignKey' && $Tag->{TagType} eq 'Start' ) {
            $ForeignKey = $Tag->{ForeignTable};
        }
        elsif ( $Tag->{Tag} eq 'Reference' && $Tag->{TagType} eq 'Start' ) {
            push( @{ $Foreign{$ForeignKey} }, $Tag );
        }
    }
    for my $Tag (@Column) {

        # type translation
        $Tag = $Self->_TypeTranslation($Tag);
        if ($SQL) {
            $SQL .= ",\n";
        }

        # auto increment
        if ( $Tag->{AutoIncrement} && $Tag->{AutoIncrement} =~ /^true$/i ) {
            $SeqCurrent = $TableName . '_' . int( rand(999) );
            push( @Seq, $SeqCurrent );
            $SQL = "    $Tag->{Name} $Tag->{Type} NOT NULL DEFAULT $SeqCurrent.NEXTVAL";
        }

        # normal data type
        else {
            $SQL .= "    $Tag->{Name} $Tag->{Type}";
            if ( $Tag->{Required} =~ /^true$/i ) {
                $SQL .= " NOT NULL";
            }
        }

        # add primary key
        if ( $Tag->{PrimaryKey} && $Tag->{PrimaryKey} =~ /true/i ) {
            $PrimaryKey     = "    PRIMARY KEY($Tag->{Name})";
            $PrimKeyColName = $Tag->{Name};
        }
    }

    # add primary key
    #    if ($PrimaryKey) {
    #        if ($SQL) {
    #            $SQL .= ",\n";
    #        }
    #        $SQL .= $PrimaryKey;
    #    }
    # add uniq
    for my $Name ( keys %Uniq ) {
        if ($SQL) {
            $SQL .= ",\n";
        }
        $SQL .= "    UNIQUE (";
        my @Array = @{ $Uniq{$Name} };
        for ( 0 .. $#Array ) {
            if ( $_ > 0 ) {
                $SQL .= ", ";
            }
            $SQL .= $Array[$_]->{Name};
        }
        $SQL .= ")";
    }
    $SQL .= "\n";

    # add sequences for autoincrement before creating table
    for (@Seq) {
        push(
            @Return,
            $Self->SequenceCreate(
                Name => $_,
                )
        );
    }

    # now the "create table" statement
    push( @Return, $SQLStart . $SQL . $SQLEnd );

    # modify to btree
    my $modifySQL = "MODIFY $TableName TO btree";
    if ($PrimaryKey) { $modifySQL .= " unique ON $PrimKeyColName WITH unique_scope = statement"; }
    push( @Return, $modifySQL );
    if ($PrimaryKey) {
        push(
            @Return,
            "ALTER TABLE $TableName ADD PRIMARY KEY ( $PrimKeyColName ) WITH index = base table structure"
        );
    }

    # add indexs
    for my $Name ( keys %Index ) {
        push(
            @Return,
            $Self->IndexCreate(
                TableName => $TableName,
                Name      => $Name,
                Data      => $Index{$Name},
                )
        );
    }

    # add uniq
    #    foreach my $Name (keys %Uniq) {
    #        push (@Return, $Self->UniqueCreate(
    #            TableName => $TableName,
    #            Name => $Name,
    #            Data => $Uniq{$Name},
    #        ));
    #    }
    # add foreign keys
    for my $ForeignKey ( keys %Foreign ) {
        my @Array = @{ $Foreign{$ForeignKey} };
        for ( 0 .. $#Array ) {
            push(
                @{ $Self->{Post} },
                $Self->ForeignKeyCreate(
                    LocalTableName   => $TableName,
                    Local            => $Array[$_]->{Local},
                    ForeignTableName => $ForeignKey,
                    Foreign          => $Array[$_]->{Foreign},
                    )
            );
        }
    }
    return @Return;
}

sub TableDrop {
    my ( $Self, @Param ) = @_;

    my $SQL = '';
    for my $Tag (@Param) {
        if ( $Tag->{Tag} eq 'Table' && $Tag->{TagType} eq 'Start' ) {
            if ( $Self->{ConfigObject}->Get('Database::ShellOutput') ) {
                $SQL .= $Self->{'DB::Comment'}
                    . "----------------------------------------------------------\n";
                $SQL .= $Self->{'DB::Comment'} . " drop table $Tag->{Name}\n";
                $SQL .= $Self->{'DB::Comment'}
                    . "----------------------------------------------------------\n";
            }
        }
        $SQL .= "DROP TABLE $Tag->{Name}";
        return ($SQL);
    }
    return ();
}

sub TableAlter {
    my ( $Self, @Param ) = @_;

    my $SQLStart = '';
    my @SQL      = ();
    my $Table    = '';
    for my $Tag (@Param) {
        if ( $Tag->{Tag} eq 'TableAlter' && $Tag->{TagType} eq 'Start' ) {
            if ( $Self->{ConfigObject}->Get('Database::ShellOutput') ) {
                $SQLStart .= $Self->{'DB::Comment'}
                    . "----------------------------------------------------------\n";
                $SQLStart .= $Self->{'DB::Comment'} . " alter table $Tag->{Name}\n";
                $SQLStart .= $Self->{'DB::Comment'}
                    . "----------------------------------------------------------\n";
            }
            $SQLStart .= "ALTER TABLE $Tag->{Name}";
            $Table = $Tag->{Name};
        }
        elsif ( $Tag->{Tag} eq 'ColumnAdd' && $Tag->{TagType} eq 'Start' ) {

            # Type translation
            $Tag = $Self->_TypeTranslation($Tag);

            # normal data type
            my $SQLEnd = $SQLStart . " ADD COLUMN $Tag->{Name} $Tag->{Type}";
            if ( $Tag->{Required} && $Tag->{Required} =~ /^true$/i ) {
                $SQLEnd .= " NOT NULL WITH DEFAULT";
            }

            #            if ($Tag->{Default}) {
            #                $SQLEnd .= " WITH DEFAULT";
            #                #$SQLEnd .= " NOT DEFAULT";
            #                #$SQLEnd .= " WITH DEFAULT $Tag->{Default}";
            #            }
            push( @SQL, $SQLEnd );
        }
        elsif ( $Tag->{Tag} eq 'ColumnChange' && $Tag->{TagType} eq 'Start' ) {

            # Type translation
            $Tag = $Self->_TypeTranslation($Tag);

            # normal data type
            if ( $Tag->{NameOld} ne $Tag->{NameNew} )
            {

                # 1. Add new column ...
                my $SQLEnd = $SQLStart . " ADD COLUMN $Tag->{NameNew} $Tag->{Type}";
                if ( $Tag->{Required} && $Tag->{Required} =~ /^true$/i ) {
                    $SQLEnd .= " NOT NULL WITH DEFAULT";
                }
                push( @SQL, $SQLEnd );

                # 2. Fill new column with values of old one
                my $SQLupdate = "UPDATE $Table SET $Tag->{NameNew} = $Tag->{NameOld} WHERE 1=1";
                push( @SQL, $SQLupdate );

                # 3. Drop old column
                my $SQLdrop = $SQLStart . " DROP COLUMN $Tag->{NameOld} RESTRICT";
                push( @SQL, $SQLdrop );
            }
            else {
                my $SQLEnd = $SQLStart . " ALTER COLUMN $Tag->{NameOld} $Tag->{Type}";
                push( @SQL, $SQLEnd );
            }
        }
        elsif ( $Tag->{Tag} eq 'ColumnDrop' && $Tag->{TagType} eq 'Start' ) {
            my $SQLEnd = $SQLStart . " DROP COLUMN $Tag->{Name} RESTRICT";
            push( @SQL, $SQLEnd );
        }
    }
    return @SQL;
}

sub IndexCreate {
    my ( $Self, %Param ) = @_;

    # check needed stuff
    for (qw(TableName Name Data)) {
        if ( !$Param{$_} ) {
            $Self->{LogObject}->Log( Priority => 'error', Message => "Need $_!" );
            return;
        }
    }
    my $SQL   = "CREATE INDEX $Param{Name} ON $Param{TableName} (";
    my @Array = @{ $Param{'Data'} };
    for ( 0 .. $#Array ) {
        if ( $_ > 0 ) {
            $SQL .= ", ";
        }
        $SQL .= $Array[$_]->{Name};
        if ( $Array[$_]->{Size} ) {

            #           $SQL .= "($Array[$_]->{Size})";
        }
    }

    #    $SQL .= ") with structure=hash"; #TODO
    $SQL .= ")";

    # return SQL
    return ($SQL);

}

sub IndexDrop {
    my ( $Self, %Param ) = @_;

    # check needed stuff
    for (qw(TableName Name)) {
        if ( !$Param{$_} ) {
            $Self->{LogObject}->Log( Priority => 'error', Message => "Need $_!" );
            return;
        }
    }
    my $SQL = "DROP INDEX $Param{Name}";
    return ($SQL);
}

sub SequenceCreate {
    my ( $Self, %Param ) = @_;

    my $SQL = "CREATE SEQUENCE $Param{Name}";

    # return SQL
    return ($SQL);
}

sub SequenceDrop {
    my ( $Self, %Param ) = @_;

    my $SQL = "DROP SEQUENCE $Param{Name}";
    return ($SQL);
}

sub ForeignKeyCreate {
    my ( $Self, %Param ) = @_;

    # check needed stuff
    for (qw(LocalTableName Local ForeignTableName Foreign)) {
        if ( !$Param{$_} ) {
            $Self->{LogObject}->Log( Priority => 'error', Message => "Need $_!" );
            return;
        }
    }
    my $SQL = "ALTER TABLE $Param{LocalTableName} ADD FOREIGN KEY (";
    $SQL .= "$Param{Local}) REFERENCES ";
    $SQL .= "$Param{ForeignTableName}($Param{Foreign})";

    # return SQL
    return ($SQL);
}

sub ForeignKeyDrop {
    my ( $Self, %Param ) = @_;

    # check needed stuff
    for (qw(TableName Name)) {
        if ( !$Param{$_} ) {
            $Self->{LogObject}->Log( Priority => 'error', Message => "Need $_!" );
            return;
        }
    }

    #    my $SQL = "ALTER TABLE $Param{TableName} DROP CONSTRAINT $Param{Name}";
    #    return ($SQL);
}

sub UniqueCreate {
    my ( $Self, %Param ) = @_;

    # check needed stuff
    for (qw(TableName Name Data)) {
        if ( !$Param{$_} ) {
            $Self->{LogObject}->Log( Priority => 'error', Message => "Need $_!" );
            return;
        }
    }
    my $SQL   = "ALTER TABLE $Param{TableName} ADD CONSTRAINT $Param{Name} UNIQUE (";
    my @Array = @{ $Param{'Data'} };
    for ( 0 .. $#Array ) {
        if ( $_ > 0 ) {
            $SQL .= ", ";
        }
        $SQL .= $Array[$_]->{Name};
    }
    $SQL .= ")";

    # return SQL
    return ($SQL);

}

sub UniqueDrop {
    my ( $Self, %Param ) = @_;

    # check needed stuff
    for (qw(TableName Name)) {
        if ( !$Param{$_} ) {
            $Self->{LogObject}->Log( Priority => 'error', Message => "Need $_!" );
            return;
        }
    }
    my $SQL = "ALTER TABLE $Param{TableName} DROP CONSTRAINT $Param{Name}";
    return ($SQL);
}

sub Insert {
    my ( $Self, @Param ) = @_;

    my $SQL    = '';
    my @Keys   = ();
    my @Values = ();

    #$Self->{LogObject}->Log(Priority => 'Error', Message => 'Working');
    for my $Tag (@Param) {
        if ( $Tag->{Tag} eq 'Insert' && $Tag->{TagType} eq 'Start' ) {
            if ( $Self->{ConfigObject}->Get('Database::ShellOutput') ) {
                $SQL .= $Self->{'DB::Comment'}
                    . "----------------------------------------------------------\n";
                $SQL .= $Self->{'DB::Comment'} . " insert into table $Tag->{Table}\n";
                $SQL .= $Self->{'DB::Comment'}
                    . "----------------------------------------------------------\n";
            }
            $SQL .= "INSERT INTO $Tag->{Table} "
        }
        if ( $Tag->{Tag} eq 'Data' && $Tag->{TagType} eq 'Start' ) {
            $Tag->{Key} = ${ $Self->Quote( \$Tag->{Key} ) };
            push( @Keys, $Tag->{Key} );
            my $Value;
            if ( defined( $Tag->{Value} ) ) {
                $Value = $Tag->{Value};
                $Self->{LogObject}->Log(
                    Priority => 'error',
                    Message =>
                        "The content for inserts is not longer appreciated attribut Value, use Content from now on! Reason: You can\'t use new lines in attributes.",
                );
            }
            elsif ( defined( $Tag->{Content} ) ) {
                $Value = $Tag->{Content};
            }
            else {
                $Value = '';
            }
            if ( $Tag->{Type} && $Tag->{Type} eq 'Quote' ) {
                $Value = "'" . ${ $Self->Quote( \$Value ) } . "'";
            }
            else {
                $Value = ${ $Self->Quote( \$Value ) };
            }
            push( @Values, $Value );
        }
    }
    my $Key = '';
    for (@Keys) {
        if ( $Key ne '' ) {
            $Key .= ", ";
        }
        $Key .= $_;
    }
    my $Value = '';
    for my $Tmp (@Values) {
        if ( $Value ne '' ) {
            $Value .= ", ";
        }
        if ( $Tmp eq 'current_timestamp' ) {
            if ( $Self->{ConfigObject}->Get('Database::ShellOutput') ) {
                $Value .= $Tmp;
            }
            else {
                my $Timestamp = $Self->{TimeObject}->CurrentTimestamp();
                $Value .= '\'' . $Timestamp . '\'';
            }
        }
        else {
            if ( $Self->{ConfigObject}->Get('Database::ShellOutput') ) {
                $Tmp =~ s/\n/\r/g;
            }
            $Value .= $Tmp;
        }
    }
    $SQL .= "($Key)\n    VALUES\n    ($Value)";
    return ($SQL);
}

sub _TypeTranslation {
    my ( $Self, $Tag ) = @_;

    # type translation
    if ( $Tag->{Type} =~ /^DATE$/i ) {
        $Tag->{Type} = 'TIMESTAMP';
    }
    if ( $Tag->{Type} =~ /^longblob$/i ) {
        $Tag->{Type} = 'LONG BYTE';
    }
    elsif ( $Tag->{Type} =~ /^VARCHAR$/i ) {
        $Tag->{Type} = "VARCHAR($Tag->{Size})";
        if ( $Tag->{Size} > 32000 ) {
            $Tag->{Type} = "LONG VARCHAR";
        }
    }
    elsif ( $Tag->{Type} =~ /^DECIMAL$/i ) {
        $Tag->{Type} = "DECIMAL ($Tag->{Size})";
    }
    return $Tag;
}
1;
