<?php

namespace App\Models\Reports;

use Config\OSPOS;

class Summary_payments extends Summary_report
{
    /**
     * @return array[]
     */
    protected function _get_data_columns(): array    // TODO: Hungarian notation
    {
        return [
            ['trans_group'    => lang('Reports.trans_group')],
            ['trans_type'     => lang('Reports.trans_type')],
            ['trans_sales'    => lang('Reports.sales')],
            ['trans_amount'   => lang('Reports.trans_amount')],
            ['trans_payments' => lang('Reports.trans_payments')],
            ['trans_refunded' => lang('Reports.trans_refunded')],
            ['trans_due'      => lang('Reports.trans_due')]
        ];
    }

    /**
     * @param array $inputs
     * @return array
     */
    public function getData(array $inputs): array
    {
        $cash_payment = lang('Sales.cash');    // TODO: This is never used.  Should it be?
        $config = config(OSPOS::class)->settings;

        $separator[] = [
            'trans_group'    => '<HR>',
            'trans_type'     => '',
            'trans_sales'    => '',
            'trans_amount'   => '',
            'trans_payments' => '',
            'trans_refunded' => '',
            'trans_due'      => ''
        ];

        $where = '';    // TODO: Duplicated code

        // TODO: this needs to be converted to ternary notation
        if (empty($config['date_or_time_format'])) {
            $where .= 'DATE(sale_time) BETWEEN ' . $this->db->escape($inputs['start_date']) . ' AND ' . $this->db->escape($inputs['end_date']);
        } else {
            $where .= 'sale_time BETWEEN ' . $this->db->escape(rawurldecode($inputs['start_date'])) . ' AND ' . $this->db->escape(rawurldecode($inputs['end_date']));
        }

        $this->create_summary_payments_temp_tables($where);

        $select = '\'' . lang('Reports.trans_sales') . '\' AS trans_group, ';
        $select .= '(CASE sale_type WHEN ' . SALE_TYPE_POS . ' THEN \'' . lang('Reports.code_pos')
            . '\' WHEN ' . SALE_TYPE_INVOICE . ' THEN \'' . lang('Sales.invoice')
            . '\' WHEN ' . SALE_TYPE_RETURN . ' THEN \'' . lang('Sales.return')
            . '\' END) AS trans_type, ';
        $select .= 'COUNT(sales.sale_id) AS trans_sales, ';
        $select .= 'SUM(sumpay_items.trans_amount) AS trans_amount, ';
        $select .= 'IFNULL(SUM(sumpay_payments.total_payments),0) AS trans_payments, ';
        $select .= 'IFNULL(SUM(sumpay_payments.total_cash_refund),0) AS trans_refunded, ';
        $select .= 'SUM(CASE WHEN sumpay_items.trans_amount - IFNULL(sumpay_payments.total_payments,0) > 0 THEN sumpay_items.trans_amount - IFNULL(sumpay_payments.total_payments,0) ELSE 0 END) as trans_due ';

        $builder = $this->db->table('ospos_sales AS sales');
        $builder->select($select);
        $builder->join('sumpay_items_temp AS sumpay_items', 'sales.sale_id = sumpay_items.sale_id', 'left outer');
        $builder->join('sumpay_payments_temp AS sumpay_payments', 'sales.sale_id = sumpay_payments.sale_id', 'left outer');
        $builder->where('sales.sale_status', COMPLETED);
        $this->_where($inputs, $builder);

        $builder->groupBy('trans_type');

        $sales = $builder->get()->getResultArray();

        // At this point in time refunds are assumed to be cash refunds.
        $total_cash_refund = 0;
        foreach ($sales as $key => $sale_summary) {
            if ($sale_summary['trans_refunded'] <> 0) {
                $total_cash_refund += $sale_summary['trans_refunded'];
            }
        }

        $select = '\'' . lang('Reports.trans_payments') . '\' AS trans_group, ';
        $select .= 'sales_payments.payment_type as trans_type, ';
        $select .= 'COUNT(sales.sale_id) AS trans_sales, ';
        $select .= 'SUM(payment_amount - cash_refund) AS trans_amount,';
        $select .= 'SUM(payment_amount) AS trans_payments,';
        $select .= 'SUM(cash_refund) AS trans_refunded, ';
        $select .= '0 AS trans_due ';

        $builder = $this->db->table('sales AS sales');
        $builder->select($select);
        $builder->join('sales_payments AS sales_payments', 'sales.sale_id = sales_payments.sale_id', 'left outer');
        $builder->where('sales.sale_status', COMPLETED);
        $this->_where($inputs, $builder);

        $builder->groupBy('sales_payments.payment_type');

        $payments = $builder->get()->getResultArray();

        // Consider Gift Card as only one type of payment and do not show "Gift Card: 1, Gift Card: 2, etc." in the total
        $gift_card_count = 0;
        $gift_card_amount = 0;
        foreach ($payments as $key => $payment) {
            if (str_contains($payment['trans_type'], lang('Sales.giftcard'))) {
                $gift_card_count += $payment['trans_sales'];
                $gift_card_amount += $payment['trans_amount'];

                // Remove the "Gift Card: 1", "Gift Card: 2", etc. payment string
                unset($payments[$key]);
            }
        }

        if ($gift_card_count > 0) {
            $payments[] = [
                'trans_group'    => lang('Reports.trans_payments'),
                'trans_type'     => lang('Sales.giftcard'),
                'trans_sales'    => $gift_card_count,
                'trans_amount'   => $gift_card_amount,
                'trans_payments' => $gift_card_amount,
                'trans_refunded' => 0,
                'trans_due'      => 0
            ];
        }

        return array_merge($sales, $separator, $payments);
    }

    /**
     * @param string $where
     * @return void
     */
    protected function create_summary_payments_temp_tables(string $where): void
    {
        // TODO: convert to using QueryBuilder. Use App/Models/Reports/Summary_taxes.php getData() as a reference template
        $decimals = totals_decimals();

        $trans_amount = 'SUM(CASE WHEN sales_items.discount_type = ' . PERCENT
            . " THEN sales_items.quantity_purchased * sales_items.item_unit_price - ROUND(sales_items.quantity_purchased * sales_items.item_unit_price * sales_items.discount / 100, $decimals) "
            . ' ELSE sales_items.quantity_purchased * (sales_items.item_unit_price - sales_items.discount) END) AS trans_amount';

        $this->db->query(
            'CREATE TEMPORARY TABLE IF NOT EXISTS ' . $this->db->prefixTable('sumpay_taxes_temp') .
                ' (INDEX(sale_id)) ENGINE=MEMORY
            (
                SELECT sales.sale_id, SUM(sales_taxes.sale_tax_amount) AS total_taxes
                FROM ' . $this->db->prefixTable('sales') . ' AS sales
                LEFT OUTER JOIN ' . $this->db->prefixTable('sales_taxes') . ' AS sales_taxes
                    ON sales.sale_id = sales_taxes.sale_id
                WHERE ' . $where . ' AND sales_taxes.tax_type = \'1\'
                GROUP BY sale_id
            )'
        );

        $this->db->query(
            'CREATE TEMPORARY TABLE IF NOT EXISTS ' . $this->db->prefixTable('sumpay_items_temp') .
                ' (INDEX(sale_id)) ENGINE=MEMORY
            (
                SELECT sales.sale_id, ' . $trans_amount
                . ' FROM ' . $this->db->prefixTable('sales') . ' AS sales '
                . 'LEFT OUTER JOIN ' . $this->db->prefixTable('sales_items') . ' AS sales_items '
                . 'ON sales.sale_id = sales_items.sale_id '
                . 'LEFT OUTER JOIN ' . $this->db->prefixTable('sumpay_taxes_temp') . ' AS sumpay_taxes '
                . 'ON sales.sale_id = sumpay_taxes.sale_id '
                . 'WHERE ' . $where . ' GROUP BY sale_id
            )'
        );

        $this->db->query('UPDATE ' . $this->db->prefixTable('sumpay_items_temp') . ' AS sumpay_items '
            . 'SET trans_amount = trans_amount + IFNULL((SELECT total_taxes FROM ' . $this->db->prefixTable('sumpay_taxes_temp')
            . ' AS sumpay_taxes WHERE sumpay_items.sale_id = sumpay_taxes.sale_id),0)');

        $this->db->query(
            'CREATE TEMPORARY TABLE IF NOT EXISTS ' . $this->db->prefixTable('sumpay_payments_temp') .
                ' (INDEX(sale_id)) ENGINE=MEMORY
            (
                SELECT sales.sale_id, COUNT(sales.sale_id) AS number_payments,
                SUM(CASE WHEN sales_payments.cash_adjustment = 0 THEN sales_payments.payment_amount ELSE 0 END) AS total_payments,
                SUM(CASE WHEN sales_payments.cash_adjustment = 1 THEN sales_payments.payment_amount ELSE 0 END) AS total_cash_adjustment,
                SUM(sales_payments.cash_refund) AS total_cash_refund
                FROM ' . $this->db->prefixTable('sales') . ' AS sales
                LEFT OUTER JOIN ' . $this->db->prefixTable('sales_payments') . ' AS sales_payments
                    ON sales.sale_id = sales_payments.sale_id
                WHERE ' . $where . '
                GROUP BY sale_id
            )'
        );
    }
}