# 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::Build::Binding::Misc;
use strict;
use warnings;

our $VERSION = '0.006001';
$VERSION = eval $VERSION;

sub bind_all {
    my ($class, $hierarchy) = @_;

    $class->bind_lucy;
    $class->bind_simple;
    $class->bind_test;
}

sub bind_lucy {
    my $xs_code = <<'END_XS_CODE';
MODULE = Lucy    PACKAGE = Lucy

IV
_dummy_function()
CODE:
    RETVAL = 1;
OUTPUT:
    RETVAL

void
STORABLE_freeze(self, ...)
    cfish_Obj *self;
PPCODE:
{
    CFISH_UNUSED_VAR(self);
    if (items < 2 || !SvTRUE(ST(1))) {
        SV *retval;
        cfish_ByteBuf *serialized_bb;
        lucy_RAMFileHandle *file_handle
            = lucy_RAMFH_open(NULL, LUCY_FH_WRITE_ONLY | LUCY_FH_CREATE, NULL);
        lucy_OutStream *target = lucy_OutStream_open((cfish_Obj*)file_handle);

        lucy_Freezer_serialize(self, target);

        LUCY_OutStream_Close(target);
        serialized_bb
            = LUCY_RAMFile_Get_Contents(LUCY_RAMFH_Get_File(file_handle));
        retval = (SV*)CFISH_BB_To_Host(serialized_bb, NULL);
        CFISH_DECREF(file_handle);
        CFISH_DECREF(target);

        if (SvCUR(retval) == 0) { // Thwart Storable bug
            THROW(CFISH_ERR, "Calling serialize produced an empty string");
        }
        ST(0) = sv_2mortal(retval);
        XSRETURN(1);
    }
}

=begin comment

Calls deserialize(), and copies the object pointer.  Since deserialize is an
abstract method, it will confess() unless implemented.

=end comment

=cut

void
STORABLE_thaw(blank_obj, cloning, serialized_sv)
    SV *blank_obj;
    SV *cloning;
    SV *serialized_sv;
PPCODE:
{
    char *class_name = HvNAME(SvSTASH(SvRV(blank_obj)));
    cfish_String *class_name_str = CFISH_SSTR_WRAP_C(class_name);
    cfish_Class *klass = cfish_Class_singleton(class_name_str, NULL);
    STRLEN len;
    char *ptr = SvPV(serialized_sv, len);
    cfish_ByteBuf *contents = cfish_BB_new_bytes(ptr, len);
    lucy_RAMFile *ram_file = lucy_RAMFile_new(contents, true);
    lucy_RAMFileHandle *file_handle
        = lucy_RAMFH_open(NULL, LUCY_FH_READ_ONLY, ram_file);
    lucy_InStream *instream = lucy_InStream_open((cfish_Obj*)file_handle);
    cfish_Obj *self = XSBind_foster_obj(aTHX_ blank_obj, klass);
    cfish_Obj *deserialized = lucy_Freezer_deserialize(self, instream);

    CFISH_UNUSED_VAR(cloning);
    CFISH_DECREF(contents);
    CFISH_DECREF(ram_file);
    CFISH_DECREF(file_handle);
    CFISH_DECREF(instream);

    // Catch bad deserialize() override.
    if (deserialized != self) {
        THROW(CFISH_ERR, "Error when deserializing obj of class %o", klass);
    }
}
END_XS_CODE

    my $binding = Clownfish::CFC::Binding::Perl::Class->new(
        parcel     => "Lucy",
        class_name => "Lucy",
    );
    $binding->append_xs($xs_code);

    Clownfish::CFC::Binding::Perl::Class->register($binding);
}

sub bind_simple {
    my @hand_rolled = qw( Add_Doc );

    my $pod_spec = Clownfish::CFC::Binding::Perl::Pod->new;
    my $synopsis = <<'END_SYNOPSIS';
First, build an index of your documents.

    my $index = Lucy::Simple->new(
        path     => '/path/to/index/'
        language => 'en',
    );

    while ( my ( $title, $content ) = each %source_docs ) {
        $index->add_doc({
            title    => $title,
            content  => $content,
        });
    }

Later, search the index.

    my $total_hits = $index->search(
        query      => $query_string,
        offset     => 0,
        num_wanted => 10,
    );

    print "Total hits: $total_hits\n";
    while ( my $hit = $index->next ) {
        print "$hit->{title}\n",
    }
END_SYNOPSIS
    my $constructor = <<'END_CONSTRUCTOR';
    my $lucy = Lucy::Simple->new(
        path     => '/path/to/index/',
        language => 'en',
    );
END_CONSTRUCTOR
    my $add_doc_pod = <<'END_ADD_DOC_POD';
=head2 add_doc

    $lucy->add_doc({
        location => $url,
        title    => $title,
        content  => $content,
    });

Add a document to the index. The document must be supplied as a hashref,
with field names as keys and content as values.

END_ADD_DOC_POD
    $pod_spec->set_synopsis($synopsis);

    $pod_spec->add_constructor( sample => $constructor );
    # Override is necessary because there's no standard way to explain
    # hash/hashref across multiple host languages.
    $pod_spec->add_method(
        method => 'Add_Doc',
        alias  => 'add_doc',
        pod    => $add_doc_pod,
    );

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

void
add_doc(self, doc_sv)
    lucy_Simple *self;
    SV *doc_sv;
PPCODE:
{
    lucy_Doc *doc = NULL;

    // 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(aTHX_ doc_sv) && SvROK(doc_sv)) {
        HV *maybe_fields = (HV*)SvRV(doc_sv);
        if (SvTYPE((SV*)maybe_fields) == SVt_PVHV) {
            lucy_Indexer *indexer = LUCY_Simple_Get_Indexer(self);
            doc = LUCY_Indexer_Get_Stock_Doc(indexer);
            LUCY_Doc_Set_Fields(doc, maybe_fields);
        }
    }
    if (!doc) {
        THROW(CFISH_ERR, "Need either a hashref or a %o",
              CFISH_Class_Get_Name(LUCY_DOC));
    }

    LUCY_Simple_Add_Doc(self, doc);
}
END_XS_CODE

    my $binding = Clownfish::CFC::Binding::Perl::Class->new(
        parcel     => "Lucy",
        class_name => "Lucy::Simple",
    );
    $binding->exclude_method($_) for @hand_rolled;
    $binding->append_xs($xs_code);
    $binding->set_pod_spec($pod_spec);

    Clownfish::CFC::Binding::Perl::Class->register($binding);
}

sub bind_test {
    my $xs_code = <<'END_XS_CODE';
MODULE = Lucy::Test   PACKAGE = Lucy::Test

#include "Clownfish/TestHarness/TestFormatter.h"
#include "Clownfish/TestHarness/TestSuite.h"

bool
run_tests(package)
    char *package;
CODE:
    cfish_String *class_name = cfish_Str_newf("%s", package);
    cfish_TestFormatter *formatter
        = (cfish_TestFormatter*)cfish_TestFormatterTAP_new();
    cfish_TestSuite *suite = testlucy_Test_create_test_suite();
    bool result = CFISH_TestSuite_Run_Batch(suite, class_name, formatter);
    CFISH_DECREF(class_name);
    CFISH_DECREF(formatter);
    CFISH_DECREF(suite);

    RETVAL = result;
OUTPUT: RETVAL
END_XS_CODE

    my $binding = Clownfish::CFC::Binding::Perl::Class->new(
        parcel     => "TestLucy",
        class_name => "Lucy::Test",
    );
    $binding->append_xs($xs_code);

    Clownfish::CFC::Binding::Perl::Class->register($binding);
}

1;