package Uploader::TransferManager;
use threads;
use threads::shared;
use strict;
use base qw/Uploader::Object/;
use Data::Dumper;
use Digest::MD5::File qw/file_md5_hex md5_hex/;

$|=1;

__PACKAGE__->mk_accessors(qw/
    preferences
    site_thumb_dir
    site_resized_dir
    write_type
    destination_category
    pwg
    event_handler
    progress_event
    done_event
/);


sub Init {
    my ( $self ) =@_;

    $self->destination_category([]);
    $self->pwg->log_progress_cbk(
        sub { $self->post_image_progress_event(@_) }
    );
}


sub cancel_image {
    my ( $self, $image ) = @_;

    #must check if $image is a valid hash
    return unless 'HASH' eq ref $image;
    return unless $image->{image_id};

    $self->log_image_progress(
        $image,
        "cancelled",
        0,
    );
}


sub process_image {
    my ( $self, $handler, $progress_event, $transfer_done_event, $image) = @_;

    $self->event_handler(
        $handler
    );


    $self->progress_event(
        $progress_event
    );

    $self->done_event(
        $transfer_done_event
    );


    if(!$self->exists_image($image)){
        $self->insert_image($image);
    }
    else {
        $self->update_image($image);
    }

}


sub exists_image {
    my ( $self, $image ) = @_;

    $self->pwg->exists_image(
        $image
    );
}


sub insert_image {
    my ( $self, $image ) = @_;

    $self->log_image_progress($image, "sending files", 0);
    $self->add_image_files($image);
    $self->add_image($image);
    $self->log_image_progress($image, "transfered", 100);

}


sub log_image_progress {
    my ( $self, $image, $status, $value ) = @_;

    $image->{status}   = $status;
    $image->{progress} = $value;
    $self->post_image_progress_event($image);
}


sub add_image_files {
    my ( $self, $image ) = @_;

    $self->init_image_files_checksums($image);
    $self->send_image_files_chunks($image);
}


sub init_image_files_checksums {
    my ( $self, $image ) = @_;


    $self->log_image_progress($image, "check files", 0);
    my @file_types = ('site_resized_file', 'site_thumb_file');
    push @file_types, 'site_high_file' if $image->{upload_high};

    map {
        $self->init_image_file_type_checksum($image, $_)
    }@file_types;

    $self->log_image_progress($image, "files checked", 100);
}


sub init_image_file_type_checksum {
    my ( $self, $image, $file_type ) = @_;

    my $file = $image->{$file_type};
    $image->{"$file_type"."_checksum"} = $self->checksum($file);
}


sub checksum {
    my ( $self, $file ) = @_;

    my $file_sum;

    eval {
        $file_sum = file_md5_hex(
            $file
        );
    };

    $file_sum;
}


sub send_image_files_chunks {
    my ( $self, $image ) = @_;

    $self->pwg->send_image_files_chunks(
        $image
    );
}


sub add_image {
    my ( $self, $image ) = @_;

    $self->pwg->add_image($image);
}


sub update_image {
    my ( $self, $image ) = @_;

    $self->log_image_progress($image, "updating", 0);

    $self->update_image_files($image);
    $self->update_image_properties($image);

    $self->log_image_progress($image, "updated", 100);
}


sub update_image_files {
    my ( $self, $image ) = @_;

    if($image->{preferences}{reupload_action_files}){
        $self->log_image_progress($image, "updating files", 0);
        $self->init_image_files_checksums($image);
        $self->update_image_modified_files($image);
        $self->log_image_progress($image, "files updated", 100);
    }
}


sub update_image_modified_files {
    my ( $self, $image ) = @_;

    $self->pwg->update_image_modified_files($image);
}


sub update_image_properties {
    my ( $self, $image ) = @_;

    $self->log_image_progress($image, "updating properties", 0);
    $self->pwg->update_image_properties($image);
    $self->log_image_progress($image, "properties updated", 100);
}


sub post_image_progress_event {
    my ( $self, $image ) = @_;

    $self->post_image_event(
        $self->progress_event,
        $image
    );
}


sub post_image_event {
    my ( $self, $event_type, $image ) = @_;

    my $thread_event = Wx::PlThreadEvent->new(
        -1,
        $event_type,
        shared_clone($image)
    );
    Wx::PostEvent($self->event_handler, $thread_event);
}


sub destination_category_is_empty {
    my ( $self ) = @_;

    !scalar @{$self->destination_category};
}


1;