<?php

namespace App\Models\Reports;

class Summary_suppliers extends Summary_report
{
    /**
     * @return array[]
     */
    protected function _get_data_columns(): array    // TODO: hungarian notation
    {
        return [
            ['supplier_name' => lang('Reports.supplier')],
            ['quantity'      => lang('Reports.quantity')],
            ['subtotal'      => lang('Reports.subtotal'), 'sorter' => 'number_sorter'],
            ['tax'           => lang('Reports.tax'), 'sorter' => 'number_sorter'],
            ['total'         => lang('Reports.total'), 'sorter' => 'number_sorter'],
            ['cost'          => lang('Reports.cost'), 'sorter' => 'number_sorter'],
            ['profit'        => lang('Reports.profit'), 'sorter' => 'number_sorter']
        ];
    }

    /**
     * @param array $inputs
     * @param object $builder
     * @return void
     */
    protected function _select(array $inputs, object &$builder): void    // TODO: hungarian notation
    {
        parent::_select($inputs, $builder);    // TODO: hungarian notation

        $builder->select('
                MAX(CONCAT(supplier_c.company_name, " (", supplier_p.first_name, " ", supplier_p.last_name, ")")) AS supplier,
                SUM(sales_items.quantity_purchased) AS quantity_purchased
        ');
    }

    /**
     * @param object $builder
     * @return void
     */
    protected function _from(object &$builder): void    // TODO: hungarian notation
    {
        parent::_from($builder);    // TODO: hungarian notation

        $builder->join('items AS items', 'sales_items.item_id = items.item_id');
        $builder->join('suppliers AS supplier_c', 'items.supplier_id = supplier_c.person_id ');
        $builder->join('people AS supplier_p', 'items.supplier_id = supplier_p.person_id');
    }

    /**
     * @param object $builder
     * @return void
     */
    protected function _group_order(object &$builder): void    // TODO: hungarian notation
    {
        $builder->groupBy('items.supplier_id');
        $builder->orderBy('MAX(CONCAT(supplier_c.company_name, " (", supplier_p.first_name, " ", supplier_p.last_name, ")"))');
    }
}