USE `vn`;
DROP procedure IF EXISTS `clientGetDebtDiary`;

DELIMITER $$
USE `vn`$$
CREATE DEFINER=`root`@`%` PROCEDURE `clientGetDebtDiary`(vClientFK INT, vCompanyFk INT)
BEGIN
/**
 * Devuelve el registro de deuda
 *
 * @param vClientFK Id del cliente
 * @param vCompanyFk Id de la empresa
 */
	DECLARE vDate DATETIME DEFAULT CURDATE();
    
    SET @balance:= 0;
    
	SELECT MAX(issued) INTO vDate FROM 
		(SELECT 
				created, 
				issued, 
                @balance:= ROUND(amount, 2) + @balance AS balance
			FROM invoiceOut
			WHERE clientFk = vClientFk AND companyFk = vCompanyFk 
										   
		UNION ALL 

		SELECT 
				created, 
				payed, 
				@balance:= ROUND(-1 * amountPaid, 2) + @balance AS balance
			FROM receipt 
			WHERE clientFk = vClientFk AND companyFk = vCompanyFk
			ORDER BY issued, created) balance
		WHERE balance = 0;

	SELECT 
        issued, 
        CAST(debtOut AS DECIMAL(10,2)) debtOut, 
        CAST(debtIn AS DECIMAL(10,2)) debtIn,
		ref, 
        companyFk, 
        priority
	FROM
		(SELECT 
                NULL AS issued, 
                SUM(amountUnpaid) AS debtOut, 
				NULL AS debtIn, 
				'Saldo Anterior' AS ref, 
                companyFk,
                0 as priority 
			FROM 
				(SELECT SUM(amount) AS amountUnpaid, companyFk, 0 
					FROM invoiceOut
					WHERE clientFk = vClientFK 
						AND issued < vDate  
					GROUP BY companyFk 
                
				UNION ALL 
            
				SELECT SUM(-1 * amountPaid), companyFk, 0 
					FROM receipt 
					WHERE clientFk = vClientFK 
						AND payed < vDate 
					GROUP BY companyFk) AS transactions 
			GROUP BY companyFk 
            
			UNION ALL 
		
			SELECT 
					issued, 
					amount as debtOut, 
					NULL AS debtIn, 
					id AS ref,
					companyFk,
					1 
				FROM invoiceOut 
				WHERE clientFk = vClientFK 
					AND issued >= vDate
			UNION ALL 
		
			SELECT 
					r.payed, 
					NULL as debtOut, 
					r.amountPaid, 
					r.id, 
					r.companyFk,
					0 
				FROM receipt r
				WHERE r.clientFk = vClientFK 
					AND r.payed >= vDate) t 
			INNER JOIN `client` c ON c.id = vClientFK 
	HAVING debtOut <> 0 OR debtIn <> 0 
    ORDER BY issued, priority DESC, debtIn;
END$$

DELIMITER ;