package Pear::LocalLoop::Controller::Api::Categories;
use Mojo::Base 'Mojolicious::Controller';

use List::Util qw/ max /;

sub post_category_list {
    my $c = shift;

    my $entity = $c->stash->{api_user}->entity;

    my $duration = DateTime::Duration->new( days => 28 );
    my $end      = DateTime->today;
    my $start    = $end->clone->subtract_duration($duration);

    my $dtf    = $c->schema->storage->datetime_parser;
    my $driver = $c->schema->storage->dbh->{Driver}->{Name};
    my $month_transaction_category_rs =
      $c->schema->resultset( 'ViewQuantisedTransactionCategory' . $driver )
      ->search(
        {
            purchase_time => {
                -between => [
                    $dtf->format_datetime($start),
                    $dtf->format_datetime($end),
                ],
            },
            buyer_id => $entity->id,
        },
        {
            columns => [
                {
                    quantised   => 'quantised_weeks',
                    value       => { sum => 'value' },
                    category_id => 'category_id',
                    essential   => 'essential',
                },
            ],
            group_by => [qw/ category_id quantised_weeks essential /],
        }
      );

    my $data = { categories => {}, essentials => {} };

    my $category_list = $c->schema->resultset('Category')->as_hash;

    for my $cat_trans ( $month_transaction_category_rs->all ) {
        my $quantised = $c->db_datetime_parser->parse_datetime(
            $cat_trans->get_column('quantised') );
        my $days     = $c->format_iso_date($quantised)       || 0;
        my $category = $cat_trans->get_column('category_id') || 0;
        my $value    = ( $cat_trans->get_column('value') || 0 ) / 100000;
        $data->{categories}->{$days}->{ $category_list->{$category} } += $value;
        next unless $cat_trans->get_column('essential');
        $data->{essentials}->{$days}->{value} += $value;
    }

    for my $day ( keys %{ $data->{categories} } ) {
        my @days = (
            map {
                {
                    days     => $day,
                    value    => $data->{categories}->{$day}->{$_},
                    category => $_,
                }
            } keys %{ $data->{categories}->{$day} }
        );
        $data->{categories}->{$day} =
          [ sort { $b->{value} <=> $a->{value} } @days ];
    }

    return $c->render(
        json => {
            success => Mojo::JSON->true,
            data    => $data,
        }
    );
}

sub pg_or_sqlite {
    my ( $c, $pg_sql, $sqlite_sql ) = @_;

    my $driver = $c->schema->storage->dbh->{Driver}->{Name};

    if ( $driver eq 'Pg' ) {
        return \$pg_sql;
    }
    elsif ( $driver eq 'SQLite' ) {
        return \$sqlite_sql;
    }
    else {
        $c->app->log->warn('Unknown Driver Used');
        return;
    }
}

1;