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

use List::Util qw/ max sum /;

has error_messages => sub {
    return {
        type => {
            required =>
              { message => 'Type of Leaderboard Required', status => 400 },
            in_resultset =>
              { message => 'Unrecognised Leaderboard Type', status => 400 },
        },
    };
};

sub post_index {
    my $c = shift;

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

    my $today_rs    = $user->purchases->today_rs;
    my $today_sum   = $today_rs->get_column('value')->sum || 0;
    my $today_count = $today_rs->count;

    my $week_rs    = $user->purchases->week_rs;
    my $week_sum   = $week_rs->get_column('value')->sum || 0;
    my $week_count = $week_rs->count;

    my $month_rs    = $user->purchases->month_rs;
    my $month_sum   = $month_rs->get_column('value')->sum || 0;
    my $month_count = $month_rs->count;

    my $user_rs    = $user->purchases;
    my $user_sum   = $user_rs->get_column('value')->sum || 0;
    my $user_count = $user_rs->count;

    my $global_rs    = $c->schema->resultset('Transaction');
    my $global_sum   = $global_rs->get_column('value')->sum || 0;
    my $global_count = $global_rs->count;

    my $leaderboard_rs = $c->schema->resultset('Leaderboard');
    my $monthly_board  = $leaderboard_rs->get_latest('monthly_total');
    my $monthly_values = $monthly_board->values;
    my $current_user_position =
        $monthly_values
      ? $monthly_values->find( { entity_id => $user->id } )
      : undef;

    return $c->render(
        json => {
            success       => Mojo::JSON->true,
            today_sum     => $today_sum / 100000,
            today_count   => $today_count,
            week_sum      => $week_sum / 100000,
            week_count    => $week_count,
            month_sum     => $month_sum / 100000,
            month_count   => $month_count,
            user_sum      => $user_sum / 100000,
            user_count    => $user_count,
            global_sum    => $global_sum / 100000,
            global_count  => $global_count,
            user_position => defined $current_user_position
            ? $current_user_position->position
            : 0,
        }
    );
}

sub post_customer {
    my $c = shift;

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

    my $purchase_rs = $entity->purchases;

    my $duration_weeks = DateTime::Duration->new( weeks => 7 );
    my $end            = DateTime->today;
    my $start_weeks    = $end->clone->subtract_duration($duration_weeks);

    my $dtf    = $c->schema->storage->datetime_parser;
    my $driver = $c->schema->storage->dbh->{Driver}->{Name};
    my $week_transaction_rs =
      $c->schema->resultset( 'ViewQuantisedTransaction' . $driver )->search(
        {
            purchase_time => {
                -between => [
                    $dtf->format_datetime($start_weeks),
                    $dtf->format_datetime($end),
                ],
            },
            buyer_id => $entity->id,
        },
        {
            columns => [
                {
                    quantised => 'quantised_weeks',
                    count     => \"COUNT(*)",
                }
            ],
            group_by => 'quantised_weeks',
            order_by => { '-asc' => 'quantised_weeks' },
        }
      );

    my @all_weeks = $week_transaction_rs->all;
    my $first =
      defined $all_weeks[0] ? $all_weeks[0]->get_column('count') || 0 : 0;
    my $second =
      defined $all_weeks[1] ? $all_weeks[1]->get_column('count') || 0 : 0;
    my $max   = max( map { $_->get_column('count') } @all_weeks );
    my $sum   = sum( map { $_->get_column('count') } @all_weeks );
    my $count = $week_transaction_rs->count;

    my $weeks = {
        first  => $first,
        second => $second,
        max    => $max,
        sum    => $sum,
        count  => $count,
    };

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

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

    my $category_purchase_rs = $purchase_rs->search(
        {},
        {
            join    => 'category',
            columns => {
                category_id => "category.category_id",
                value       => { sum => 'value' },
            },
            group_by => "category.category_id",
        }
    );

    my %cat_total_list;

    for ( $category_purchase_rs->all ) {
        my $category = $_->get_column('category_id') || 0;
        my $value    = ( $_->get_column('value') || 0 ) / 100000;

        $cat_total_list{ $category_list->{$category} } += $value;
    }

    my @cat_lists = map {
        {
            category => $_,
            value    => $cat_total_list{$_},
            icon => $c->schema->resultset('Category')->as_hash_name_icon->{$_}
              || 'question'
        }
    } sort keys %cat_total_list;
    $data->{cat_list} = [ sort { $b->{value} <=> $a->{value} } @cat_lists ];

    my $purchase_no_essential_rs = $purchase_rs->search(
        {
            "me.essential" => 1,
        }
    );

    $data->{essentials} = {
        purchase_no_total           => $purchase_rs->count,
        purchase_no_essential_total => $purchase_no_essential_rs->count,
    };

    my $duration_month = DateTime::Duration->new( days => 28 );
    my $start_month    = $end->clone->subtract_duration($duration_month);
    my $month_transaction_category_rs =
      $c->schema->resultset( 'ViewQuantisedTransactionCategory' . $driver )
      ->search(
        {
            purchase_time => {
                -between => [
                    $dtf->format_datetime($start_month),
                    $dtf->format_datetime($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 /],
        }
      );

    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->{cat_total}->{ $category_list->{$category} } += $value;
        $data->{categories}->{$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,
            weeks   => $weeks,
        }
    );
}

sub post_organisation {
    my $c = shift;

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

    my $purchase_rs = $entity->purchases;

    my $duration_weeks = DateTime::Duration->new( weeks => 7 );
    my $end            = DateTime->today;
    my $start_weeks    = $end->clone->subtract_duration($duration_weeks);

    my $dtf    = $c->schema->storage->datetime_parser;
    my $driver = $c->schema->storage->dbh->{Driver}->{Name};
    my $week_transaction_rs =
      $c->schema->resultset( 'ViewQuantisedTransaction' . $driver )->search(
        {
            purchase_time => {
                -between => [
                    $dtf->format_datetime($start_weeks),
                    $dtf->format_datetime($end),
                ],
            },
            buyer_id => $entity->id,
        },
        {
            columns => [
                {
                    quantised => 'quantised_weeks',
                    count     => \"COUNT(*)",
                }
            ],
            group_by => 'quantised_weeks',
            order_by => { '-asc' => 'quantised_weeks' },
        }
      );

    my @all_weeks = $week_transaction_rs->all;
    my $first =
      defined $all_weeks[0] ? $all_weeks[0]->get_column('count') || 0 : 0;
    my $second =
      defined $all_weeks[1] ? $all_weeks[1]->get_column('count') || 0 : 0;
    my $max   = max( map { $_->get_column('count') } @all_weeks );
    my $sum   = sum( map { $_->get_column('count') } @all_weeks );
    my $count = $week_transaction_rs->count;

    my $weeks = {
        first  => $first,
        second => $second,
        max    => $max,
        sum    => $sum,
        count  => $count,
    };

    my $data = {
        cat_total      => {},
        categories     => {},
        essentials     => {},
        cat_list       => {},
        sector_monthly => {}
    };

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

    my $category_purchase_rs = $purchase_rs->search(
        {},
        {
            join    => 'category',
            columns => {
                category_id => "category.category_id",
                value       => { sum => 'value' },
            },
            group_by => "category.category_id",
        }
    );

    my %cat_total_list;

    for ( $category_purchase_rs->all ) {
        my $category = $_->get_column('category_id') || 0;
        my $value    = ( $_->get_column('value') || 0 ) / 100000;

        $cat_total_list{ $category_list->{$category} } += $value;
    }

    my @cat_lists = map {
        {
            category => $_,
            value    => $cat_total_list{$_},
            icon => $c->schema->resultset('Category')->as_hash_name_icon->{$_}
              || 'question'
        }
    } sort keys %cat_total_list;
    $data->{cat_list} = [ sort { $b->{value} <=> $a->{value} } @cat_lists ];

    my $purchase_no_essential_rs = $purchase_rs->search(
        {
            "me.essential" => 1,
        }
    );

    $data->{essentials} = {
        purchase_no_total           => $purchase_rs->count,
        purchase_no_essential_total => $purchase_no_essential_rs->count,
    };

    my $duration_month = DateTime::Duration->new( days => 28 );
    my $start_month    = $end->clone->subtract_duration($duration_month);
    my $month_transaction_category_rs =
      $c->schema->resultset( 'ViewQuantisedTransactionCategory' . $driver )
      ->search(
        {
            purchase_time => {
                -between => [
                    $dtf->format_datetime($start_month),
                    $dtf->format_datetime($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 /],
        }
      );

    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->{cat_total}->{ $category_list->{$category} } += $value;
        $data->{categories}->{$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 ];
    }

# my $start_year_monthly = DateTime->now->truncate( to => 'year' );
# my $current_year_monthly = DateTime->now->add( months => 1, end_of_month => 'limit' );
# my $monthly_sector_transactions_rs = $c->schema->resultset('ViewQuantisedTransaction' . $driver)->search(
#   {
#     purchase_time => {
#       -between => [
#         $dtf->format_datetime($start_year_monthly),
#         $dtf->format_datetime($current_year_monthly),
#       ],
#     },
#     buyer_id => $entity->id,
#   },
#   {
#     columns => [
#       {
#         quantised        => 'quantised_months',
#         value            => { sum => 'value' },
#       },
#     ],
#     group_by => [ qw/ quantised_months / ],
#   }
# );
#
# for my $sector_transaction ( $monthly_sector_transactions_rs->all ) {
#   my $quantised = $c->db_datetime_parser->parse_datetime($cat_trans->get_column('quantised'));
#   my $months = $c->format_iso_date( $quantised ) || 0;
#   my $category = $cat_trans->get_column('category_id') || 0;
#   my $value = ($cat_trans->get_column('value') || 0) / 100000;
# }

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

sub post_leaderboards {
    my $c = shift;

    my $validation = $c->validation;
    $validation->input( $c->stash->{api_json} );

    my $leaderboard_rs = $c->schema->resultset('Leaderboard');

    $validation->required('type')->in_resultset( 'type', $leaderboard_rs );

    return $c->api_validation_error if $validation->has_error;

    my $today_board = $leaderboard_rs->get_latest( $validation->param('type') );

    my $today_values = $today_board->values->search(
        {},
        {
            order_by => { -asc => 'me.position' },
            columns  => [
                qw/
                  me.value
                  me.trend
                  me.position
                  /,
                { display_name => 'customer.display_name' },
            ],
            join => { entity => 'customer' },
        },
    );
    $today_values->result_class('DBIx::Class::ResultClass::HashRefInflator');

    my @leaderboard_array = $today_values->all;

    if ( $validation->param('type') =~ /total$/ ) {
        @leaderboard_array = (
            map {
                {
                    %$_,
                      value => $_->{value} / 100000,
                }
            } @leaderboard_array
        );
    }

    my $current_user_position =
      $today_values->find( { entity_id => $c->stash->{api_user}->entity->id } );

    return $c->render(
        json => {
            success       => Mojo::JSON->true,
            leaderboard   => [@leaderboard_array],
            user_position => defined $current_user_position
            ? $current_user_position->{position}
            : 0,
        }
    );
}

sub post_leaderboards_paged {
    my $c = shift;

    my $validation = $c->validation;
    $validation->input( $c->stash->{api_json} );

    my $leaderboard_rs = $c->schema->resultset('Leaderboard');

    $validation->required('type')->in_resultset( 'type', $leaderboard_rs );
    $validation->optional('page')->number;

    return $c->api_validation_error if $validation->has_error;

    my $page = 1;

    my $today_board = $leaderboard_rs->get_latest( $validation->param('type') );
    my @leaderboard_array;
    my $current_user_position;
    my $values_count = 0;
    if ( defined $today_board ) {

        if ( !defined $validation->param('page')
            || $validation->param('page') < 1 )
        {
            my $user_position = $today_board->values->find(
                { entity_id => $c->stash->{api_user}->entity->id } );
            $page = int(
                defined $user_position ? $user_position->{position} : 0 / 10 )
              + 1;
        }
        else {
            $page = $validation->param('page');
        }

        my $today_values = $today_board->values->search(
            {},
            {
                page     => $page,
                rows     => 10,
                order_by => { -asc => 'me.position' },
                columns  => [
                    qw/
                      me.value
                      me.trend
                      me.position
                      /,
                    { display_name => 'customer.display_name' },
                ],
                join => { entity => 'customer' },
            },
        );
        $today_values->result_class(
            'DBIx::Class::ResultClass::HashRefInflator');

        @leaderboard_array = $today_values->all;

        $values_count = $today_values->pager->total_entries;

        if ( $validation->param('type') =~ /total$/ ) {
            @leaderboard_array = (
                map {
                    {
                        %$_,
                          value => $_->{value} / 100000,
                    }
                } @leaderboard_array
            );
        }

        $current_user_position = $today_values->find(
            { entity_id => $c->stash->{api_user}->entity->id } );
    }
    return $c->render(
        json => {
            success       => Mojo::JSON->true,
            leaderboard   => [@leaderboard_array],
            user_position => defined $current_user_position
            ? $current_user_position->{position}
            : 0,
            page  => $page,
            count => $values_count,
        }
    );
}

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;