#!/bin/sh

# Copyright (C) 2016-2023 Internet Systems Consortium, Inc. ("ISC")
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

# shellcheck disable=SC1091
# SC1091: Not following: ... was not specified as input (see shellcheck -x).

# Exit with error if commands exit with non-zero and if undefined variables are
# used.
set -eu

# shellcheck disable=SC2034
# SC2034: ... appears unused. Verify use (or export if used externally).
prefix="/usr"

# Include utilities. Use installed version if available and
# use build version if it isn't.
if test -f "${prefix}/share/kea/scripts/admin-utils.sh"; then
    . "${prefix}/share/kea/scripts/admin-utils.sh"
else
    . "/build/kea/src/kea-2.4.1/src/bin/admin/admin-utils.sh"
fi

VERSION=$(mysql_version "$@")

if [ "$VERSION" != "2.0" ]; then
    printf 'This script upgrades 2.0 to 3.0. '
    printf 'Reported version is %s. Skipping upgrade.\n' "${VERSION}"
    exit 0
fi

mysql "$@" <<EOF
-- This line starts the schema upgrade to version 3.0.

CREATE TABLE IF NOT EXISTS hosts (
    host_id INT UNSIGNED NOT NULL AUTO_INCREMENT ,
    dhcp_identifier VARBINARY(128) NOT NULL ,
    dhcp_identifier_type TINYINT NOT NULL ,
    dhcp4_subnet_id INT UNSIGNED NULL ,
    dhcp6_subnet_id INT UNSIGNED NULL ,
    ipv4_address INT UNSIGNED NULL ,
    hostname VARCHAR(255) NULL ,
    dhcp4_client_classes VARCHAR(255) NULL ,
    dhcp6_client_classes VARCHAR(255) NULL ,
    PRIMARY KEY (host_id) ,
    INDEX key_dhcp4_identifier_subnet_id (dhcp_identifier ASC, dhcp_identifier_type ASC) ,
    INDEX key_dhcp6_identifier_subnet_id (dhcp_identifier ASC, dhcp_identifier_type ASC, dhcp6_subnet_id ASC)
) ENGINE = INNODB;

CREATE TABLE IF NOT EXISTS ipv6_reservations (
    reservation_id INT NOT NULL AUTO_INCREMENT ,
    address VARCHAR(39) NOT NULL ,
    prefix_len TINYINT(3) UNSIGNED NOT NULL DEFAULT 128 ,
    type TINYINT(4) UNSIGNED NOT NULL DEFAULT 0 ,
    dhcp6_iaid INT UNSIGNED NULL ,
    host_id INT UNSIGNED NOT NULL ,
    PRIMARY KEY (reservation_id) ,
    INDEX fk_ipv6_reservations_host_idx (host_id ASC) ,
    CONSTRAINT fk_ipv6_reservations_Host
    FOREIGN KEY (host_id )
    REFERENCES hosts (host_id )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION
) ENGINE = INNODB;

CREATE TABLE IF NOT EXISTS dhcp4_options (
    option_id INT UNSIGNED NOT NULL AUTO_INCREMENT ,
    code TINYINT UNSIGNED NOT NULL ,
    value BLOB NULL ,
    formatted_value TEXT NULL ,
    space VARCHAR(128) NULL ,
    persistent TINYINT(1) NOT NULL DEFAULT 0 ,
    dhcp_client_class VARCHAR(128) NULL ,
    dhcp4_subnet_id INT NULL ,
    host_id INT UNSIGNED NULL ,
    PRIMARY KEY (option_id) ,
    UNIQUE INDEX option_id_UNIQUE (option_id ASC) ,
    INDEX fk_options_host1_idx (host_id ASC) ,
    CONSTRAINT fk_options_host1
    FOREIGN KEY (host_id )
    REFERENCES hosts (host_id )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION
) ENGINE = INNODB;

CREATE TABLE IF NOT EXISTS dhcp6_options (
    option_id INT UNSIGNED NOT NULL AUTO_INCREMENT ,
    code INT UNSIGNED NOT NULL ,
    value BLOB NULL ,
    formatted_value TEXT NULL ,
    space VARCHAR(128) NULL ,
    persistent TINYINT(1) NOT NULL DEFAULT 0 ,
    dhcp_client_class VARCHAR(128) NULL ,
    dhcp6_subnet_id INT NULL ,
    host_id INT UNSIGNED NULL ,
    PRIMARY KEY (option_id) ,
    UNIQUE INDEX option_id_UNIQUE (option_id ASC) ,
    INDEX fk_options_host1_idx (host_id ASC) ,
    CONSTRAINT fk_options_host10
    FOREIGN KEY (host_id )
    REFERENCES hosts (host_id )
    ON DELETE NO ACTION
    ON UPDATE NO ACTION
) ENGINE = INNODB;

DELIMITER $$
CREATE TRIGGER host_BDEL BEFORE DELETE ON hosts FOR EACH ROW
-- Edit trigger body code below this line. Do not edit lines above this one
BEGIN
DELETE FROM ipv6_reservations WHERE ipv6_reservations.host_id = OLD.host_id;
END
$$
DELIMITER ;

# Update the schema version number.
UPDATE schema_version
    SET version = '3', minor = '0';

# This line concludes the schema upgrade to version 3.0.

EOF
