# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

package Lucy::Index::Indexer;
use Lucy;
our $VERSION = '0.003002';
$VERSION = eval $VERSION;

1;

__END__

__BINDING__

my $xs_code = <<'END_XS_CODE';
MODULE = Lucy  PACKAGE = Lucy::Index::Indexer

int32_t
CREATE(...)
CODE:
    CHY_UNUSED_VAR(items);
    RETVAL = lucy_Indexer_CREATE;
OUTPUT: RETVAL

int32_t
TRUNCATE(...)
CODE:
    CHY_UNUSED_VAR(items);
    RETVAL = lucy_Indexer_TRUNCATE;
OUTPUT: RETVAL

void
add_doc(self, ...)
    lucy_Indexer *self;
PPCODE:
{
    lucy_Doc *doc = NULL;
    SV *doc_sv = NULL;
    float boost = 1.0;

    if (items == 2) {
        doc_sv = ST(1);
    }
    else if (items > 2) {
        chy_bool_t args_ok
            = XSBind_allot_params(&(ST(0)), 1, items,
                                  "Lucy::Index::Indexer::add_doc_PARAMS",
                                  ALLOT_SV(&doc_sv, "doc", 3, true),
                                  ALLOT_F32(&boost, "boost", 5, false),
                                  NULL);
        if (!args_ok) {
            CFISH_RETHROW(CFISH_INCREF(cfish_Err_get_error()));
        }
    }
    else if (items == 1) {
        CFISH_THROW(LUCY_ERR, "Missing required argument 'doc'");
    }

    // Either get a Doc or use the stock doc.
    if (sv_isobject(doc_sv)
        && sv_derived_from(doc_sv, "Lucy::Document::Doc")
       ) {
        IV tmp = SvIV(SvRV(doc_sv));
        doc = INT2PTR(lucy_Doc*, tmp);
    }
    else if (XSBind_sv_defined(doc_sv) && SvROK(doc_sv)) {
        HV *maybe_fields = (HV*)SvRV(doc_sv);
        if (SvTYPE((SV*)maybe_fields) == SVt_PVHV) {
            doc = Lucy_Indexer_Get_Stock_Doc(self);
            Lucy_Doc_Set_Fields(doc, maybe_fields);
        }
    }
    if (!doc) {
        THROW(LUCY_ERR, "Need either a hashref or a %o",
              Lucy_VTable_Get_Name(LUCY_DOC));
    }

    Lucy_Indexer_Add_Doc(self, doc, boost);
}
END_XS_CODE

my $synopsis = <<'END_SYNOPSIS';
    my $indexer = Lucy::Index::Indexer->new(
        schema => $schema,
        index  => '/path/to/index',
        create => 1,
    );
    while ( my ( $title, $content ) = each %source_docs ) {
        $indexer->add_doc({
            title   => $title,
            content => $content,
        });
    }
    $indexer->commit;
END_SYNOPSIS

my $constructor = <<'END_NEW';
==head2 new( I<[labeled params]> )

    my $indexer = Lucy::Index::Indexer->new(
        schema   => $schema,             # required at index creation
        index    => '/path/to/index',    # required
        create   => 1,                   # default: 0
        truncate => 1,                   # default: 0
        manager  => $manager             # default: created internally
    );

==over

==item *

B<schema> - A Schema.  Required when index is being created; if not supplied,
will be extracted from the index folder.

==item *

B<index> - Either a filepath to an index or a Folder.

==item *

B<create> - If true and the index directory does not exist, attempt to create
it.

==item *

B<truncate> - If true, proceed with the intention of discarding all previous
indexing data.  The old data will remain intact and visible until commit()
succeeds.

==item *

B<manager> - An IndexManager.

==back
END_NEW

# Override is necessary because there's no standard way to explain
# hash/hashref across multiple host languages.
my $add_doc_pod = <<'END_ADD_DOC_POD';
==head2 add_doc(...)

    $indexer->add_doc($doc);
    $indexer->add_doc( { field_name => $field_value } );
    $indexer->add_doc(
        doc   => { field_name => $field_value },
        boost => 2.5,         # default: 1.0
    );

Add a document to the index.  Accepts either a single argument or labeled
params.

==over

==item *

B<doc> - Either a Lucy::Document::Doc object, or a hashref (which will
be attached to a Lucy::Document::Doc object internally).

==item *

B<boost> - A floating point weight which affects how this document scores.

==back

END_ADD_DOC_POD

Clownfish::CFC::Binding::Perl::Class->register(
    parcel       => "Lucy",
    class_name   => "Lucy::Index::Indexer",
    xs_code      => $xs_code,
    bind_methods => [
        qw(
            Delete_By_Term
            Delete_By_Query
            Add_Index
            Commit
            Prepare_Commit
            Optimize
            )
    ],
    bind_constructors => ["_new|init"],
    make_pod          => {
        methods => [
            { name => 'add_doc', pod => $add_doc_pod },
            qw(
                add_index
                optimize
                commit
                prepare_commit
                delete_by_term
                delete_by_query
                )
        ],
        synopsis     => $synopsis,
        constructors => [ { pod => $constructor } ],
    },
);