#!/bin/sh

# Copyright (C) 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-2.4.0/src/bin/admin/admin-utils.sh"
fi

# Check version.
version=$(mysql_version "${@}")
if test "${version}" != "17.0"; then
    printf 'This script upgrades 17.0 to 18.0. '
    printf 'Reported version is %s. Skipping upgrade.\n' "${version}"
    exit 0
fi

# Get the schema name from database argument. We need this to
# query information_schema for the right database.
for arg in "${@}"
do
    if ! printf '%s' "${arg}" | grep -Eq -- '^--'
    then
        schema="$arg"
        break
    fi
done

# Make sure we have the schema.
if [ -z "$schema" ]
then
    printf "Could not find database schema name in cmd line args: %s\n" "${*}"
    exit 255
fi

mysql "$@" <<EOF
-- This line starts the schema upgrade to version 18.0.

-- Extend lease4 client_id to 255 bytes.
ALTER TABLE lease4
    MODIFY COLUMN client_id VARBINARY(255);

-- Extend hosts dhcp_identifier to 255 bytes.
ALTER TABLE hosts
    MODIFY COLUMN dhcp_identifier VARBINARY(255) NOT NULL;

-- Extend hosts relay_id to 255 bytes.
ALTER TABLE lease4
    MODIFY COLUMN relay_id VARBINARY(255) DEFAULT NULL;

-- Extend hosts remote_id to 255 bytes.
ALTER TABLE lease4
    MODIFY COLUMN remote_id VARBINARY(255) DEFAULT NULL;

-- Extend lease6 duid to 130 bytes.
ALTER TABLE lease6
    MODIFY COLUMN duid VARBINARY(130);

UPDATE lease6 SET duid = UNHEX('000000') WHERE duid = UNHEX('00');

# Add pool_id column to the lease4 table.
ALTER TABLE lease4
    ADD COLUMN pool_id INT UNSIGNED NOT NULL DEFAULT 0;

# Add pool_id column to the lease6 table.
ALTER TABLE lease6
    ADD COLUMN pool_id INT UNSIGNED NOT NULL DEFAULT 0;

# Create lease4_pool_stat table
CREATE TABLE lease4_pool_stat (
    subnet_id INT UNSIGNED NOT NULL,
    pool_id INT UNSIGNED NOT NULL,
    state INT UNSIGNED NOT NULL,
    leases BIGINT,
    PRIMARY KEY (subnet_id, pool_id, state)
) ENGINE = INNODB;

# Create lease6_pool_stat table
CREATE TABLE lease6_pool_stat (
    subnet_id INT UNSIGNED NOT NULL,
    pool_id INT UNSIGNED NOT NULL,
    lease_type INT UNSIGNED NOT NULL,
    state INT UNSIGNED NOT NULL,
    leases BIGINT,
    PRIMARY KEY (subnet_id, pool_id, lease_type, state)
) ENGINE = INNODB;

DROP PROCEDURE IF EXISTS lease4_AINS_lease4_pool_stat;
DELIMITER $$
CREATE PROCEDURE lease4_AINS_lease4_pool_stat(IN new_state TINYINT,
                                              IN new_subnet_id INT UNSIGNED,
                                              IN new_pool_id INT UNSIGNED)
BEGIN
    IF new_state = 0 OR new_state = 1 THEN
        -- Update the state count if it exists.
        UPDATE lease4_pool_stat SET leases = leases + 1
            WHERE subnet_id = new_subnet_id AND pool_id = new_pool_id
            AND state = new_state;

        -- Insert the state count record if it does not exist.
        IF ROW_COUNT() <= 0 THEN
            INSERT INTO lease4_pool_stat
            VALUES (new_subnet_id, new_pool_id, new_state, 1);
        END IF;
    END IF;
END $$
DELIMITER ;

DROP PROCEDURE IF EXISTS lease4_AUPD_lease4_pool_stat;
DELIMITER $$
CREATE PROCEDURE lease4_AUPD_lease4_pool_stat(IN old_state TINYINT,
                                              IN old_subnet_id INT UNSIGNED,
                                              IN old_pool_id INT UNSIGNED,
                                              IN new_state TINYINT,
                                              IN new_subnet_id INT UNSIGNED,
                                              IN new_pool_id INT UNSIGNED)
BEGIN
    IF old_subnet_id != new_subnet_id OR
       old_pool_id != new_pool_id OR
       old_state != new_state THEN
        IF old_state = 0 OR old_state = 1 THEN
            -- Decrement the old state count if record exists.
            UPDATE lease4_pool_stat
                SET leases = IF(leases > 0, leases - 1, 0)
                WHERE subnet_id = old_subnet_id AND pool_id = old_pool_id
                AND state = old_state;
        END IF;

        IF new_state = 0 OR new_state = 1 THEN
            -- Increment the new state count if record exists.
            UPDATE lease4_pool_stat SET leases = leases + 1
                WHERE subnet_id = new_subnet_id AND pool_id = new_pool_id
                AND state = new_state;

            -- Insert new state record if it does not exist.
            IF ROW_COUNT() <= 0 THEN
                INSERT INTO lease4_pool_stat
                VALUES (new_subnet_id, new_pool_id, new_state, 1);
            END IF;
        END IF;
    END IF;
END $$
DELIMITER ;

DROP PROCEDURE IF EXISTS lease4_ADEL_lease4_pool_stat;
DELIMITER $$
CREATE PROCEDURE lease4_ADEL_lease4_pool_stat(IN old_state TINYINT,
                                              IN old_subnet_id INT UNSIGNED,
                                              IN old_pool_id INT UNSIGNED)
BEGIN
    IF old_state = 0 OR old_state = 1 THEN
        -- Decrement the state count if record exists.
        UPDATE lease4_pool_stat
            SET leases = IF(leases > 0, leases - 1, 0)
            WHERE subnet_id = old_subnet_id AND pool_id = old_pool_id
            AND state = old_state;
    END IF;
END $$
DELIMITER ;

DROP PROCEDURE IF EXISTS lease6_AINS_lease6_pool_stat;
DELIMITER $$
CREATE PROCEDURE lease6_AINS_lease6_pool_stat(IN new_state TINYINT,
                                              IN new_subnet_id INT UNSIGNED,
                                              IN new_pool_id INT UNSIGNED,
                                              IN new_lease_type TINYINT)
BEGIN
    IF new_state = 0 OR new_state = 1 THEN
        -- Update the state count if it exists.
        UPDATE lease6_pool_stat SET leases = leases + 1
            WHERE subnet_id = new_subnet_id AND pool_id = new_pool_id
            AND lease_type = new_lease_type AND state = new_state;

        -- Insert the state count record if it does not exist.
        IF ROW_COUNT() <= 0 THEN
            INSERT INTO lease6_pool_stat
            VALUES (new_subnet_id, new_pool_id, new_lease_type, new_state, 1);
        END IF;
    END IF;
END $$
DELIMITER ;

DROP PROCEDURE IF EXISTS lease6_AUPD_lease6_pool_stat;
DELIMITER $$
CREATE PROCEDURE lease6_AUPD_lease6_pool_stat(IN old_state TINYINT,
                                              IN old_subnet_id INT UNSIGNED,
                                              IN old_pool_id INT UNSIGNED,
                                              IN old_lease_type TINYINT,
                                              IN new_state TINYINT,
                                              IN new_subnet_id INT UNSIGNED,
                                              IN new_pool_id INT UNSIGNED,
                                              IN new_lease_type TINYINT)
BEGIN
    IF old_subnet_id != new_subnet_id OR
       old_pool_id != new_pool_id OR
       old_lease_type != new_lease_type OR
       old_state != new_state THEN
        IF old_state = 0 OR old_state = 1 THEN
            -- Decrement the old state count if record exists.
            UPDATE lease6_pool_stat
                SET leases = IF(leases > 0, leases - 1, 0)
                WHERE subnet_id = old_subnet_id AND pool_id = old_pool_id
                AND lease_type = old_lease_type AND state = old_state;
        END IF;

        IF new_state = 0 OR new_state = 1 THEN
            -- Increment the new state count if record exists
            UPDATE lease6_pool_stat SET leases = leases + 1
                WHERE subnet_id = new_subnet_id AND pool_id = new_pool_id
                AND lease_type = new_lease_type AND state = new_state;

            -- Insert new state record if it does not exist
            IF ROW_COUNT() <= 0 THEN
                INSERT INTO lease6_pool_stat
                VALUES (new_subnet_id, new_pool_id, new_lease_type, new_state, 1);
            END IF;
        END IF;
    END IF;
END $$
DELIMITER ;

DROP PROCEDURE IF EXISTS lease6_ADEL_lease6_pool_stat;
DELIMITER $$
CREATE PROCEDURE lease6_ADEL_lease6_pool_stat(IN old_state TINYINT,
                                              IN old_subnet_id INT UNSIGNED,
                                              IN old_pool_id INT UNSIGNED,
                                              IN old_lease_type TINYINT)
BEGIN
    IF old_state = 0 OR old_state = 1 THEN
        -- Decrement the state count if record exists
        UPDATE lease6_pool_stat
            SET leases = IF(leases > 0, leases - 1, 0)
            WHERE subnet_id = old_subnet_id AND pool_id = old_pool_id
            AND lease_type = old_lease_type AND state = old_state;
    END IF;
END $$
DELIMITER ;

DROP TRIGGER IF EXISTS lease4_AINS;
DELIMITER $$
CREATE TRIGGER lease4_AINS AFTER INSERT ON lease4 FOR EACH ROW
BEGIN
    CALL lease4_AINS_lease4_stat(NEW.state, NEW.subnet_id);
    CALL lease4_AINS_lease4_pool_stat(NEW.state, NEW.subnet_id, NEW.pool_id);
    IF @json_supported IS NULL THEN
        SELECT isJsonSupported() INTO @json_supported;
    END IF;
    IF @json_supported = 1 THEN
        CALL lease4_AINS_lease4_stat_by_client_class(NEW.state, NEW.user_context);
    END IF;
END $$
DELIMITER ;

DROP TRIGGER IF EXISTS lease4_AUPD;
DELIMITER $$
CREATE TRIGGER lease4_AUPD AFTER UPDATE ON lease4 FOR EACH ROW
BEGIN
    CALL lease4_AUPD_lease4_stat(OLD.state, OLD.subnet_id, NEW.state, NEW.subnet_id);
    CALL lease4_AUPD_lease4_pool_stat(OLD.state, OLD.subnet_id, OLD.pool_id, NEW.state, NEW.subnet_id, NEW.pool_id);
    IF @json_supported IS NULL THEN
        SELECT isJsonSupported() INTO @json_supported;
    END IF;
    IF @json_supported = 1 THEN
        CALL lease4_AUPD_lease4_stat_by_client_class(OLD.state, OLD.user_context, NEW.state, NEW.user_context);
    END IF;
END $$
DELIMITER ;

DROP TRIGGER IF EXISTS lease4_ADEL;
DELIMITER $$
CREATE TRIGGER lease4_ADEL AFTER DELETE ON lease4 FOR EACH ROW
BEGIN
    CALL lease4_ADEL_lease4_stat(OLD.state, OLD.subnet_id);
    CALL lease4_ADEL_lease4_pool_stat(OLD.state, OLD.subnet_id, OLD.pool_id);
    IF @json_supported IS NULL THEN
        SELECT isJsonSupported() INTO @json_supported;
    END IF;
    IF @json_supported = 1 THEN
        CALL lease4_ADEL_lease4_stat_by_client_class(OLD.state, OLD.user_context);
    END IF;
END $$
DELIMITER ;

DROP TRIGGER IF EXISTS lease6_AINS;
DELIMITER $$
CREATE TRIGGER lease6_AINS AFTER INSERT ON lease6 FOR EACH ROW
BEGIN
    CALL lease6_AINS_lease6_stat(NEW.state, NEW.subnet_id, NEW.lease_type);
    CALL lease6_AINS_lease6_pool_stat(NEW.state, NEW.subnet_id, NEW.pool_id, NEW.lease_type);
    IF @json_supported IS NULL THEN
        SELECT isJsonSupported() INTO @json_supported;
    END IF;
    IF @json_supported = 1 THEN
        CALL lease6_AINS_lease6_stat_by_client_class(NEW.state, NEW.user_context, NEW.lease_type);
    END IF;
END $$
DELIMITER ;

DROP TRIGGER IF EXISTS lease6_AUPD;
DELIMITER $$
CREATE TRIGGER lease6_AUPD AFTER UPDATE ON lease6 FOR EACH ROW
BEGIN
    CALL lease6_AUPD_lease6_stat(OLD.state, OLD.subnet_id, OLD.lease_type, NEW.state, NEW.subnet_id, NEW.lease_type);
    CALL lease6_AUPD_lease6_pool_stat(OLD.state, OLD.subnet_id, OLD.pool_id, OLD.lease_type, NEW.state, NEW.subnet_id, NEW.pool_id, NEW.lease_type);
    IF @json_supported IS NULL THEN
        SELECT isJsonSupported() INTO @json_supported;
    END IF;
    IF @json_supported = 1 THEN
        CALL lease6_AUPD_lease6_stat_by_client_class(OLD.state, OLD.user_context, OLD.lease_type, NEW.state, NEW.user_context, NEW.lease_type);
    END IF;
END $$
DELIMITER ;

DROP TRIGGER IF EXISTS lease6_ADEL;
DELIMITER $$
CREATE TRIGGER lease6_ADEL AFTER DELETE ON lease6 FOR EACH ROW
BEGIN
    CALL lease6_ADEL_lease6_stat(OLD.state, OLD.subnet_id, OLD.lease_type);
    CALL lease6_ADEL_lease6_pool_stat(OLD.state, OLD.subnet_id, OLD.pool_id, OLD.lease_type);
    IF @json_supported IS NULL THEN
        SELECT isJsonSupported() INTO @json_supported;
    END IF;
    IF @json_supported = 1 THEN
        CALL lease6_ADEL_lease6_stat_by_client_class(OLD.state, OLD.user_context, OLD.lease_type);
    END IF;
END $$
DELIMITER ;

DROP PROCEDURE IF EXISTS lease4DumpHeader;
DELIMITER $$
CREATE PROCEDURE lease4DumpHeader()
BEGIN
SELECT 'address,hwaddr,client_id,valid_lifetime,expire,subnet_id,fqdn_fwd,fqdn_rev,hostname,state,user_context,pool_id';
END $$
DELIMITER ;

-- Adding support for pool ID in procedure to output a memfile-ready CSV file.
DROP PROCEDURE IF EXISTS lease4DumpData;
DELIMITER $$
CREATE PROCEDURE lease4DumpData()
BEGIN
    SELECT
        INET_NTOA(address),
        IFNULL(colonSeparatedHex(HEX(hwaddr)), ''),
        IFNULL(colonSeparatedHex(HEX(client_id)), ''),
        valid_lifetime,
        UNIX_TIMESTAMP(expire),
        subnet_id,
        fqdn_fwd,
        fqdn_rev,
        REPLACE(hostname, ',', '&#x2c'),
        state,
        REPLACE(IFNULL(user_context, ''), ',', '&#x2c'),
        pool_id
    FROM lease4
    ORDER BY address;
END $$
DELIMITER ;

DROP PROCEDURE IF EXISTS lease6DumpHeader;
DELIMITER $$
CREATE PROCEDURE lease6DumpHeader()
BEGIN
    SELECT 'address,duid,valid_lifetime,expire,subnet_id,pref_lifetime,lease_type,iaid,prefix_len,fqdn_fwd,fqdn_rev,hostname,hwaddr,state,user_context,hwtype,hwaddr_source,pool_id';
END $$
DELIMITER ;

-- Adding support for pool ID in procedure to output a memfile-ready CSV file.
DROP PROCEDURE IF EXISTS lease6DumpData;
DELIMITER $$
CREATE PROCEDURE lease6DumpData()
BEGIN
    SELECT
        address,
        IFNULL(colonSeparatedHex(HEX(duid)), ''),
        valid_lifetime,
        UNIX_TIMESTAMP(expire),
        subnet_id,
        pref_lifetime,
        lease_type,
        iaid,
        prefix_len,
        fqdn_fwd,
        fqdn_rev,
        REPLACE(hostname, ',', '&#x2c'),
        IFNULL(colonSeparatedHex(HEX(hwaddr)), ''),
        state,
        REPLACE(IFNULL(user_context, ''), ',', '&#x2c'),
        hwtype,
        hwaddr_source,
        pool_id
    FROM lease6
    ORDER BY address;
END $$
DELIMITER ;

-- Drop and create lease4Upload stored procedure with 255 bytes long client_id and support for pool_id.
DROP PROCEDURE IF EXISTS lease4Upload;
DELIMITER $$
CREATE PROCEDURE lease4Upload(
    IN address VARCHAR(15),
    IN hwaddr VARCHAR(20),
    IN client_id VARCHAR(255),
    IN valid_lifetime INT UNSIGNED,
    IN expire BIGINT UNSIGNED,
    IN subnet_id INT UNSIGNED,
    IN fqdn_fwd TINYINT,
    IN fqdn_rev TINYINT,
    IN hostname VARCHAR(255),
    IN state INT UNSIGNED,
    IN user_context TEXT,
    IN pool_id INT UNSIGNED
)
BEGIN
    INSERT INTO lease4 (
        address,
        hwaddr,
        client_id,
        valid_lifetime,
        expire,
        subnet_id,
        fqdn_fwd,
        fqdn_rev,
        hostname,
        state,
        user_context,
        pool_id
    ) VALUES (
        INET_ATON(address),
        UNHEX(REPLACE(hwaddr, ':', '')),
        UNHEX(REPLACE(client_id, ':', '')),
        valid_lifetime,
        FROM_UNIXTIME(expire),
        subnet_id,
        fqdn_fwd,
        fqdn_rev,
        REPLACE(hostname, '&#x2c', ','),
        state,
        REPLACE(user_context, '&#x2c', ','),
        pool_id
    );
END $$
DELIMITER ;

-- Drop and create lease6Upload stored procedure with 130 bytes long duid and support for pool_id.
DROP PROCEDURE IF EXISTS lease6Upload;
DELIMITER $$
CREATE PROCEDURE lease6Upload(
    IN address VARCHAR(39),
    IN duid VARCHAR(130),
    IN valid_lifetime INT UNSIGNED,
    IN expire BIGINT UNSIGNED,
    IN subnet_id INT UNSIGNED,
    IN pref_lifetime INT UNSIGNED,
    IN lease_type TINYINT,
    IN iaid INT UNSIGNED,
    IN prefix_len TINYINT UNSIGNED,
    IN fqdn_fwd TINYINT,
    IN fqdn_rev TINYINT,
    IN hostname VARCHAR(255),
    IN hwaddr VARCHAR(64),
    IN state INT UNSIGNED,
    IN user_context TEXT,
    IN hwtype SMALLINT,
    IN hwaddr_source INT UNSIGNED,
    IN pool_id INT UNSIGNED
)
BEGIN
    INSERT INTO lease6 (
        address,
        duid,
        valid_lifetime,
        expire,
        subnet_id,
        pref_lifetime,
        lease_type,
        iaid,
        prefix_len,
        fqdn_fwd,
        fqdn_rev,
        hostname,
        hwaddr,
        state,
        user_context,
        hwtype,
        hwaddr_source,
        pool_id
    ) VALUES (
        address,
        UNHEX(REPLACE(duid, ':', '')),
        valid_lifetime,
        FROM_UNIXTIME(expire),
        subnet_id,
        pref_lifetime,
        lease_type,
        iaid,
        prefix_len,
        fqdn_fwd,
        fqdn_rev,
        REPLACE(hostname, '&#x2c', ','),
        UNHEX(REPLACE(hwaddr, ':', '')),
        state,
        REPLACE(user_context, '&#x2c', ','),
        hwtype,
        hwaddr_source,
        pool_id
    );
END $$
DELIMITER ;

INSERT INTO lease4_pool_stat (subnet_id, pool_id, state, leases)
    SELECT subnet_id, pool_id, state, count(*) FROM lease4
    WHERE state = 0 OR state = 1 GROUP BY subnet_id, pool_id, state;

INSERT INTO lease6_pool_stat (subnet_id, pool_id, lease_type, state, leases)
    SELECT subnet_id, pool_id, lease_type, state, count(*) FROM lease6
    WHERE state = 0 OR state = 1 GROUP BY subnet_id, pool_id, lease_type, state;

-- Add the binary version of the IPv6 address for v6 BLQ prefix filter.
ALTER TABLE lease6
    ADD COLUMN binaddr BINARY(16) DEFAULT NULL;
CREATE INDEX lease6_by_binaddr ON lease6 (binaddr ASC);

-- Create table for v6 BLQ by-relay-id.
CREATE TABLE lease6_relay_id (
    extended_info_id INT UNSIGNED NOT NULL AUTO_INCREMENT,
    relay_id VARBINARY(130) NOT NULL,
    lease_addr BINARY(16) NOT NULL,
    PRIMARY KEY (extended_info_id),
    INDEX key_lease6_relay_id_by_id (relay_id, lease_addr ASC),
    INDEX key_lease6_relay_id_by_address (lease_addr)
)  ENGINE = INNODB;

-- Create table for v6 BLQ by-remote-id.
CREATE TABLE lease6_remote_id (
    extended_info_id INT UNSIGNED NOT NULL AUTO_INCREMENT,
    remote_id VARBINARY(255) NOT NULL,
    lease_addr BINARY(16) NOT NULL,
    PRIMARY KEY (extended_info_id),
    INDEX key_lease6_remote_id_by_id (remote_id, lease_addr ASC),
    INDEX key_lease6_remote_id_by_address (lease_addr)
)  ENGINE = INNODB;

-- Update the schema version number.
UPDATE schema_version
    SET version = '18', minor = '0';

-- This line concludes the schema upgrade to version 18.0.

EOF
