# --
# Copyright (C) 2001-2021 OTRS AG, https://otrs.com/
# Copyright (C) 2021 Znuny GmbH, https://znuny.org/
# --
# This software comes with ABSOLUTELY NO WARRANTY. For details, see
# the enclosed file COPYING for license information (GPL). If you
# did not receive this file, see https://www.gnu.org/licenses/gpl-3.0.txt.
# --

package Kernel::Modules::AdminDynamicFieldCheckbox;

use strict;
use warnings;

our $ObjectManagerDisabled = 1;

use Kernel::System::VariableCheck qw(:all);
use Kernel::Language              qw(Translatable);

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

    my $Self = {%Param};
    bless( $Self, $Type );

    return $Self;
}

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

    # Store last entity screen.
    $Kernel::OM->Get('Kernel::System::AuthSession')->UpdateSessionID(
        SessionID => $Self->{SessionID},
        Key       => 'LastScreenEntity',
        Value     => $Self->{RequestedURL},
    );

    my $LayoutObject = $Kernel::OM->Get('Kernel::Output::HTML::Layout');

    if ( $Self->{Subaction} eq 'Add' ) {
        return $Self->_Add(
            %Param,
        );
    }
    elsif ( $Self->{Subaction} eq 'AddAction' ) {

        # challenge token check for write action
        $LayoutObject->ChallengeTokenCheck();

        return $Self->_AddAction(
            %Param,
        );
    }
    if ( $Self->{Subaction} eq 'Change' ) {
        return $Self->_Change(
            %Param,
        );
    }
    elsif ( $Self->{Subaction} eq 'ChangeAction' ) {

        # challenge token check for write action
        $LayoutObject->ChallengeTokenCheck();

        return $Self->_ChangeAction(
            %Param,
        );
    }
    return $LayoutObject->ErrorScreen(
        Message => Translatable('Undefined subaction.'),
    );
}

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

    my $LayoutObject = $Kernel::OM->Get('Kernel::Output::HTML::Layout');

    my %GetParam;
    for my $Needed (qw(ObjectType FieldType FieldOrder)) {
        $GetParam{$Needed} = $Kernel::OM->Get('Kernel::System::Web::Request')->GetParam( Param => $Needed );
        if ( !$GetParam{$Needed} ) {
            return $LayoutObject->ErrorScreen(
                Message => $LayoutObject->{LanguageObject}->Translate( 'Need %s', $Needed ),
            );
        }
    }

    # get the object type and field type display name
    my $ConfigObject   = $Kernel::OM->Get('Kernel::Config');
    my $ObjectTypeName = $ConfigObject->Get('DynamicFields::ObjectType')->{ $GetParam{ObjectType} }->{DisplayName}
        || '';
    my $FieldTypeName = $ConfigObject->Get('DynamicFields::Driver')->{ $GetParam{FieldType} }->{DisplayName} || '';

    return $Self->_ShowScreen(
        %Param,
        %GetParam,
        Mode           => 'Add',
        BreadcrumbText => $LayoutObject->{LanguageObject}
            ->Translate( 'Add %s field', $LayoutObject->{LanguageObject}->Translate($FieldTypeName) ),
        ObjectTypeName => $ObjectTypeName,
        FieldTypeName  => $FieldTypeName,
    );
}

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

    my %Errors;
    my %GetParam;
    my $ParamObject = $Kernel::OM->Get('Kernel::System::Web::Request');

    for my $Needed (qw(Name Label FieldOrder)) {
        $GetParam{$Needed} = $ParamObject->GetParam( Param => $Needed );
        if ( !$GetParam{$Needed} ) {
            $Errors{ $Needed . 'ServerError' }        = 'ServerError';
            $Errors{ $Needed . 'ServerErrorMessage' } = Translatable('This field is required.');
        }
    }

    if ( $GetParam{Name} ) {

        # check if name is alphanumeric
        if ( $GetParam{Name} !~ m{\A (?: [a-zA-Z] | \d )+ \z}xms ) {

            # add server error error class
            $Errors{NameServerError} = 'ServerError';
            $Errors{NameServerErrorMessage} =
                Translatable('The field does not contain only ASCII letters and numbers.');
        }

        # check if name is duplicated
        my %DynamicFieldsList = %{
            $Kernel::OM->Get('Kernel::System::DynamicField')->DynamicFieldList(
                Valid      => 0,
                ResultType => 'HASH',
            )
        };

        %DynamicFieldsList = reverse %DynamicFieldsList;

        if ( $DynamicFieldsList{ $GetParam{Name} } ) {

            # add server error error class
            $Errors{NameServerError}        = 'ServerError';
            $Errors{NameServerErrorMessage} = Translatable('There is another field with the same name.');
        }
    }

    if ( $GetParam{FieldOrder} ) {

        # check if field order is numeric and positive
        if ( $GetParam{FieldOrder} !~ m{\A (?: \d )+ \z}xms ) {

            # add server error error class
            $Errors{FieldOrderServerError}        = 'ServerError';
            $Errors{FieldOrderServerErrorMessage} = Translatable('The field must be numeric.');
        }
    }

    for my $ConfigParam (qw(ObjectType ObjectTypeName FieldType FieldTypeName DefaultValue ValidID))
    {
        $GetParam{$ConfigParam} = $ParamObject->GetParam( Param => $ConfigParam );
    }

    my $LayoutObject = $Kernel::OM->Get('Kernel::Output::HTML::Layout');

    # uncorrectable errors
    if ( !$GetParam{ValidID} ) {
        return $LayoutObject->ErrorScreen(
            Message => Translatable('Need ValidID'),
        );
    }

    # return to add screen if errors
    if (%Errors) {
        return $Self->_ShowScreen(
            %Param,
            %Errors,
            %GetParam,
            Mode => 'Add',
        );
    }

    # set specific config
    my $FieldConfig = {
        DefaultValue => $GetParam{DefaultValue},
    };

    # create a new field
    my $FieldID = $Kernel::OM->Get('Kernel::System::DynamicField')->DynamicFieldAdd(
        Name       => $GetParam{Name},
        Label      => $GetParam{Label},
        FieldOrder => $GetParam{FieldOrder},
        FieldType  => $GetParam{FieldType},
        ObjectType => $GetParam{ObjectType},
        Config     => $FieldConfig,
        ValidID    => $GetParam{ValidID},
        UserID     => $Self->{UserID},
    );

    if ( !$FieldID ) {
        return $LayoutObject->ErrorScreen(
            Message => Translatable('Could not create the new field'),
        );
    }

    return $LayoutObject->Redirect(
        OP => "Action=AdminDynamicField",
    );
}

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

    my $LayoutObject = $Kernel::OM->Get('Kernel::Output::HTML::Layout');
    my %GetParam;

    for my $Needed (qw(ObjectType FieldType)) {
        $GetParam{$Needed} = $Kernel::OM->Get('Kernel::System::Web::Request')->GetParam( Param => $Needed );
        if ( !$GetParam{$Needed} ) {
            return $LayoutObject->ErrorScreen(
                Message => $LayoutObject->{LanguageObject}->Translate( 'Need %s', $Needed ),
            );
        }
    }

    # get the object type and field type display name
    my $ConfigObject   = $Kernel::OM->Get('Kernel::Config');
    my $ObjectTypeName = $ConfigObject->Get('DynamicFields::ObjectType')->{ $GetParam{ObjectType} }->{DisplayName}
        || '';
    my $FieldTypeName = $ConfigObject->Get('DynamicFields::Driver')->{ $GetParam{FieldType} }->{DisplayName} || '';

    my $FieldID = $Kernel::OM->Get('Kernel::System::Web::Request')->GetParam( Param => 'ID' );

    if ( !$FieldID ) {
        return $LayoutObject->ErrorScreen(
            Message => Translatable('Need ID'),
        );
    }

    # get dynamic field data
    my $DynamicFieldData = $Kernel::OM->Get('Kernel::System::DynamicField')->DynamicFieldGet(
        ID => $FieldID,
    );

    # check for valid dynamic field configuration
    if ( !IsHashRefWithData($DynamicFieldData) ) {
        return $LayoutObject->ErrorScreen(
            Message =>
                $LayoutObject->{LanguageObject}->Translate( 'Could not get data for dynamic field %s', $FieldID ),
        );
    }

    my %Config = ();

    # extract configuration
    if ( IsHashRefWithData( $DynamicFieldData->{Config} ) ) {
        %Config = %{ $DynamicFieldData->{Config} };
    }

    return $Self->_ShowScreen(
        %Param,
        %GetParam,
        %${DynamicFieldData},
        %Config,
        ID             => $FieldID,
        Mode           => 'Change',
        BreadcrumbText => $LayoutObject->{LanguageObject}
            ->Translate( 'Change %s field', $LayoutObject->{LanguageObject}->Translate($FieldTypeName) ),
        ObjectTypeName => $ObjectTypeName,
        FieldTypeName  => $FieldTypeName,
    );
}

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

    my $ParamObject = $Kernel::OM->Get('Kernel::System::Web::Request');
    my %Errors;
    my %GetParam;

    for my $Needed (qw(Name Label FieldOrder)) {
        $GetParam{$Needed} = $ParamObject->GetParam( Param => $Needed );
        if ( !$GetParam{$Needed} ) {
            $Errors{ $Needed . 'ServerError' }        = 'ServerError';
            $Errors{ $Needed . 'ServerErrorMessage' } = Translatable('This field is required.');
        }
    }

    my $LayoutObject = $Kernel::OM->Get('Kernel::Output::HTML::Layout');
    my $FieldID      = $ParamObject->GetParam( Param => 'ID' );
    if ( !$FieldID ) {
        return $LayoutObject->ErrorScreen(
            Message => Translatable('Need ID'),
        );
    }

    my $DynamicField = $Kernel::OM->Get('Kernel::System::DynamicField');

    # get dynamic field data
    my $DynamicFieldData = $DynamicField->DynamicFieldGet(
        ID => $FieldID,
    );

    # check for valid dynamic field configuration
    if ( !IsHashRefWithData($DynamicFieldData) ) {
        return $LayoutObject->ErrorScreen(
            Message =>
                $LayoutObject->{LanguageObject}->Translate( 'Could not get data for dynamic field %s', $FieldID ),
        );
    }

    if ( $GetParam{Name} ) {

        # check if name is lowercase
        if ( $GetParam{Name} !~ m{\A (?: [a-zA-Z] | \d )+ \z}xms ) {

            # add server error error class
            $Errors{NameServerError} = 'ServerError';
            $Errors{NameServerErrorMessage} =
                Translatable('The field does not contain only ASCII letters and numbers.');
        }

        # check if name is duplicated
        my %DynamicFieldsList = %{
            $DynamicField->DynamicFieldList(
                Valid      => 0,
                ResultType => 'HASH',
            )
        };

        %DynamicFieldsList = reverse %DynamicFieldsList;

        if (
            $DynamicFieldsList{ $GetParam{Name} } &&
            $DynamicFieldsList{ $GetParam{Name} } ne $FieldID
            )
        {

            # add server error class
            $Errors{NameServerError}        = 'ServerError';
            $Errors{NameServerErrorMessage} = Translatable('There is another field with the same name.');
        }

        # if it's an internal field, it's name should not change
        if (
            $DynamicFieldData->{InternalField} &&
            $DynamicFieldsList{ $GetParam{Name} } ne $FieldID
            )
        {

            # add server error class
            $Errors{NameServerError}        = 'ServerError';
            $Errors{NameServerErrorMessage} = Translatable('The name for this field should not change.');
            $Param{InternalField}           = $DynamicFieldData->{InternalField};
        }
    }

    if ( $GetParam{FieldOrder} ) {

        # check if field order is numeric and positive
        if ( $GetParam{FieldOrder} !~ m{\A (?: \d )+ \z}xms ) {

            # add server error error class
            $Errors{FieldOrderServerError}        = 'ServerError';
            $Errors{FieldOrderServerErrorMessage} = Translatable('The field must be numeric.');
        }
    }

    for my $ConfigParam (qw(ObjectType ObjectTypeName FieldType FieldTypeName DefaultValue ValidID))
    {
        $GetParam{$ConfigParam} = $ParamObject->GetParam( Param => $ConfigParam );
    }

    # uncorrectable errors
    if ( !$GetParam{ValidID} ) {
        return $LayoutObject->ErrorScreen(
            Message => Translatable('Need ValidID'),
        );
    }

    # Check if dynamic field is present in SysConfig setting
    my $UpdateEntity        = $ParamObject->GetParam( Param => 'UpdateEntity' ) || '';
    my $SysConfigObject     = $Kernel::OM->Get('Kernel::System::SysConfig');
    my %DynamicFieldOldData = %{$DynamicFieldData};
    my @IsDynamicFieldInSysConfig;
    @IsDynamicFieldInSysConfig = $SysConfigObject->ConfigurationEntityCheck(
        EntityType => 'DynamicField',
        EntityName => $DynamicFieldData->{Name},
    );
    if (@IsDynamicFieldInSysConfig) {

        # An entity present in SysConfig couldn't be invalidated.
        if (
            $Kernel::OM->Get('Kernel::System::Valid')->ValidLookup( ValidID => $GetParam{ValidID} )
            ne 'valid'
            )
        {
            $Errors{ValidIDInvalid}         = 'ServerError';
            $Errors{ValidOptionServerError} = 'InSetting';
        }

        # In case changing name an authorization (UpdateEntity) should be send
        elsif ( $DynamicFieldData->{Name} ne $GetParam{Name} && !$UpdateEntity ) {
            $Errors{NameInvalid}              = 'ServerError';
            $Errors{InSettingNameServerError} = 1;
        }
    }

    # return to change screen if errors
    if (%Errors) {
        return $Self->_ShowScreen(
            %Param,
            %Errors,
            %GetParam,
            ID   => $FieldID,
            Mode => 'Change',
        );
    }

    # set specific config
    my $FieldConfig = {
        DefaultValue => $GetParam{DefaultValue},
    };

    # update dynamic field (FieldType and ObjectType cannot be changed; use old values)
    my $UpdateSuccess = $DynamicField->DynamicFieldUpdate(
        ID         => $FieldID,
        Name       => $GetParam{Name},
        Label      => $GetParam{Label},
        FieldOrder => $GetParam{FieldOrder},
        FieldType  => $DynamicFieldData->{FieldType},
        ObjectType => $DynamicFieldData->{ObjectType},
        Config     => $FieldConfig,
        ValidID    => $GetParam{ValidID},
        UserID     => $Self->{UserID},
    );

    if ( !$UpdateSuccess ) {
        return $LayoutObject->ErrorScreen(
            Message => $LayoutObject->{LanguageObject}->Translate( 'Could not update the field %s', $GetParam{Name} ),
        );
    }

    if (
        @IsDynamicFieldInSysConfig
        && $DynamicFieldOldData{Name} ne $GetParam{Name}
        && $UpdateEntity
        )
    {
        SETTING:
        for my $SettingName (@IsDynamicFieldInSysConfig) {

            my %Setting = $SysConfigObject->SettingGet(
                Name => $SettingName,
            );

            next SETTING if !IsHashRefWithData( \%Setting );

            $Setting{EffectiveValue} =~ s/$DynamicFieldOldData{Name}/$GetParam{Name}/g;

            my $ExclusiveLockGUID = $SysConfigObject->SettingLock(
                Name   => $Setting{Name},
                Force  => 1,
                UserID => $Self->{UserID}
            );
            $Setting{ExclusiveLockGUID} = $ExclusiveLockGUID;

            my %UpdateSuccess = $SysConfigObject->SettingUpdate(
                %Setting,
                UserID => $Self->{UserID},
            );
        }

        $SysConfigObject->ConfigurationDeploy(
            Comments      => "DynamicField name change",
            DirtySettings => \@IsDynamicFieldInSysConfig,
            UserID        => $Self->{UserID},
            Force         => 1,
        );
    }

    # if the user would like to continue editing the dynamic field, just redirect to the change screen
    if (
        defined $ParamObject->GetParam( Param => 'ContinueAfterSave' )
        && ( $ParamObject->GetParam( Param => 'ContinueAfterSave' ) eq '1' )
        )
    {
        return $LayoutObject->Redirect(
            OP =>
                "Action=$Self->{Action};Subaction=Change;ObjectType=$DynamicFieldData->{ObjectType};FieldType=$DynamicFieldData->{FieldType};ID=$FieldID"
        );
    }
    else {

        # otherwise return to overview
        return $LayoutObject->Redirect( OP => "Action=AdminDynamicField" );
    }
}

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

    $Param{DisplayFieldName} = 'New';

    if ( $Param{Mode} eq 'Change' ) {
        $Param{ShowWarning}      = 'ShowWarning';
        $Param{DisplayFieldName} = $Param{Name};
    }

    my $LayoutObject = $Kernel::OM->Get('Kernel::Output::HTML::Layout');

    # header
    my $Output = $LayoutObject->Header();
    $Output .= $LayoutObject->NavigationBar();

    # get all fields
    my $DynamicFieldList = $Kernel::OM->Get('Kernel::System::DynamicField')->DynamicFieldListGet(
        Valid => 0,
    );

    # get the list of order numbers (is already sorted).
    my @DynamicfieldOrderList;
    my %DynamicfieldNamesList;
    for my $Dynamicfield ( @{$DynamicFieldList} ) {
        push @DynamicfieldOrderList, $Dynamicfield->{FieldOrder};
        $DynamicfieldNamesList{ $Dynamicfield->{FieldOrder} } = $Dynamicfield->{Label};
    }

    # when adding we need to create an extra order number for the new field
    if ( $Param{Mode} eq 'Add' ) {

        # get the last element from the order list and add 1
        my $LastOrderNumber = $DynamicfieldOrderList[-1];
        $LastOrderNumber++;

        # add this new order number to the end of the list
        push @DynamicfieldOrderList, $LastOrderNumber;
    }

    # show the names of the other fields to ease ordering
    my %OrderNamesList;
    my $CurrentlyText = $LayoutObject->{LanguageObject}->Translate('Currently') . ': ';
    for my $OrderNumber ( sort @DynamicfieldOrderList ) {
        $OrderNamesList{$OrderNumber} = $OrderNumber;
        if ( $DynamicfieldNamesList{$OrderNumber} && $OrderNumber ne $Param{FieldOrder} ) {
            $OrderNamesList{$OrderNumber} = $OrderNumber . ' - '
                . $CurrentlyText
                . $DynamicfieldNamesList{$OrderNumber};
        }
    }

    my $DynamicFieldOrderStrg = $LayoutObject->BuildSelection(
        Data          => \%OrderNamesList,
        Name          => 'FieldOrder',
        SelectedValue => $Param{FieldOrder} || 1,
        PossibleNone  => 0,
        Translation   => 0,
        Sort          => 'NumericKey',
        Class         => 'Modernize W75pc Validate_Number',
    );

    my %ValidList = $Kernel::OM->Get('Kernel::System::Valid')->ValidList();

    # create the Validity select
    my $ValidityStrg = $LayoutObject->BuildSelection(
        Data         => \%ValidList,
        Name         => 'ValidID',
        SelectedID   => $Param{ValidID} || 1,
        PossibleNone => 0,
        Translation  => 1,
        Class        => 'Modernize W50pc',
    );

    # define config field specific settings
    my $DefaultValue = $Param{DefaultValue} || '';

    # create the default value select
    my $DefaultValueStrg = $LayoutObject->BuildSelection(
        Data => {
            0 => Translatable('Unchecked'),
            1 => Translatable('Checked'),
        },
        Name         => 'DefaultValue',
        SelectedID   => $Param{DefaultValue} || 0,
        PossibleNone => 0,
        Translation  => 1,
        Class        => 'Modernize',
    );

    my $ReadonlyInternalField = '';

    # Internal fields can not be deleted and name should not change.
    if ( $Param{InternalField} ) {
        $LayoutObject->Block(
            Name => 'InternalField',
            Data => {%Param},
        );
        $ReadonlyInternalField = 'readonly="readonly"';
    }

    my $DynamicFieldName = $Param{Name};

    # Add warning in case the DynamicField belongs a SysConfig setting.
    my $SysConfigObject = $Kernel::OM->Get('Kernel::System::SysConfig');

    # In case dirty setting disable form
    my $IsDirtyConfig = 0;
    my @IsDirtyResult = $SysConfigObject->ConfigurationDirtySettingsList();
    my %IsDirtyList   = map { $_ => 1 } @IsDirtyResult;

    my @IsDynamicFieldInSysConfig = $SysConfigObject->ConfigurationEntityCheck(
        EntityType => 'DynamicField',
        EntityName => $DynamicFieldName // '',
    );

    if (@IsDynamicFieldInSysConfig) {
        $LayoutObject->Block(
            Name => 'DynamicFieldInSysConfig',
            Data => {
                OldName => $DynamicFieldName,
            },
        );
        for my $SettingName (@IsDynamicFieldInSysConfig) {
            $LayoutObject->Block(
                Name => 'DynamicFieldInSysConfigRow',
                Data => {
                    SettingName => $SettingName,
                },
            );

            # Verify if dirty setting
            if ( $IsDirtyList{$SettingName} ) {
                $IsDirtyConfig = 1;
            }

        }
    }

    if ($IsDirtyConfig) {
        $LayoutObject->Block(
            Name => 'DynamicFieldInSysConfigDirty',

        );
    }

    # generate output
    $Output .= $LayoutObject->Output(
        TemplateFile => 'AdminDynamicFieldCheckbox',
        Data         => {
            %Param,
            ValidityStrg          => $ValidityStrg,
            DynamicFieldOrderStrg => $DynamicFieldOrderStrg,
            DefaultValueStrg      => $DefaultValueStrg,
            ReadonlyInternalField => $ReadonlyInternalField,
        }
    );

    $Output .= $LayoutObject->Footer();

    return $Output;
}

1;
