USE accounting;

-- cdr cascade update
DROP TRIGGER IF EXISTS cdr_cascade_update_trig;
DELIMITER ;;
CREATE TRIGGER cdr_cascade_update_trig AFTER UPDATE ON cdr
  FOR EACH ROW BEGIN

  UPDATE cdr_relation_data SET cdr_id = NEW.id WHERE cdr_id = OLD.id;
  UPDATE cdr_cash_balance_data SET cdr_id = NEW.id WHERE cdr_id = OLD.id;
  UPDATE cdr_time_balance_data SET cdr_id = NEW.id WHERE cdr_id = OLD.id;

  END;;
DELIMITER ;

-- cdr cascade delete
DROP TRIGGER IF EXISTS cdr_cascade_delete_trig;
DELIMITER ;;
CREATE TRIGGER cdr_cascade_delete_trig AFTER DELETE ON cdr
  FOR EACH ROW BEGIN

  DELETE FROM cdr_relation_data WHERE cdr_id = OLD.id;
  DELETE FROM cdr_cash_balance_data WHERE cdr_id = OLD.id;
  DELETE FROM cdr_time_balance_data WHERE cdr_id = OLD.id;

  END;;
DELIMITER ;

-- cdr_relation cascade delete restriction
DROP TRIGGER IF EXISTS cdr_relation_rest_cascade_delete_trig;
DELIMITER ;;
CREATE TRIGGER cdr_relation_rest_cascade_delete_trig BEFORE DELETE ON cdr_relation
  FOR EACH ROW BEGIN

    SELECT count(relation_id) INTO @rel_count FROM cdr_relation_data WHERE relation_id = OLD.id LIMIT 1;

    IF @rel_count > 0 THEN
        SET @err_msg = 'Error deleting data from accounting.cdr_relation, related data exists in accounting.cdr_relation_data';
        SIGNAL sqlstate '45000' SET message_text = @err_msg;
    END IF;

  END;;
DELIMITER ;

-- cdr_provider cascade delete restriction
DROP TRIGGER IF EXISTS cdr_provider_rest_cascade_delete_trig;
DELIMITER ;;
CREATE TRIGGER cdr_provider_rest_cascade_delete_trig BEFORE DELETE ON cdr_provider
  FOR EACH ROW BEGIN

    SELECT count(provider_id) INTO @rel_prov_count
        FROM cdr_relation_data WHERE provider_id = OLD.id LIMIT 1;
    SELECT count(provider_id) INTO @cash_balance_prov_count
        FROM cdr_cash_balance_data WHERE provider_id = OLD.id LIMIT 1;
    SELECT count(provider_id) INTO @time_balance_prov_count
        FROM cdr_time_balance_data WHERE provider_id = OLD.id LIMIT 1;

    IF @rel_prov_count > 0 THEN
        SET @err_msg = 'Error deleting data from accounting.cdr_provider, related data exists in accounting.cdr_relation_data';
        SIGNAL sqlstate '45000' SET message_text = @err_msg;
    END IF;

    IF @cash_balance_prov_count > 0 THEN
        SET @err_msg = 'Error deleting data from accounting.cdr_provider, related data exists in accounting.cdr_cash_balance_data';
        SIGNAL sqlstate '45000' SET message_text = @err_msg;
    END IF;

    IF @time_balance_prov_count > 0 THEN
        SET @err_msg = 'Error deleting data from accounting.cdr_provider, related data exists in accounting.cdr_time_balance_data';
        SIGNAL sqlstate '45000' SET message_text = @err_msg;
    END IF;

  END;;
DELIMITER ;

-- cdr_direction cascade delete restriction
DROP TRIGGER IF EXISTS cdr_direction_rest_cascade_delete_trig;
DELIMITER ;;
CREATE TRIGGER cdr_direction_rest_cascade_delete_trig BEFORE DELETE ON cdr_direction
  FOR EACH ROW BEGIN

    SELECT count(direction_id) INTO @rel_dir_count
        FROM cdr_relation_data WHERE direction_id = OLD.id LIMIT 1;
    SELECT count(direction_id) INTO @cash_balance_dir_count
        FROM cdr_cash_balance_data WHERE direction_id = OLD.id LIMIT 1;
    SELECT count(direction_id) INTO @time_balance_dir_count
        FROM cdr_time_balance_data WHERE direction_id = OLD.id LIMIT 1;

    IF @rel_dir_count > 0 THEN
        SET @err_msg = 'Error deleting data from accounting.cdr_direction, related data exists in accounting.cdr_relation_data';
        SIGNAL sqlstate '45000' SET message_text = @err_msg;
    END IF;

    IF @cash_balance_dir_count > 0 THEN
        SET @err_msg = 'Error deleting data from accounting.cdr_direction, related data exists in accounting.cdr_cash_balance_data';
        SIGNAL sqlstate '45000' SET message_text = @err_msg;
    END IF;

    IF @time_balance_dir_count > 0 THEN
        SET @err_msg = 'Error deleting data from accounting.cdr_direction, related data exists in accounting.cdr_time_balance_data';
        SIGNAL sqlstate '45000' SET message_text = @err_msg;
    END IF;

  END;;
DELIMITER ;