<?php

// when db schema modifications are done, this function is run.
$dbversion = intval($_config['dbversion']);
$db->beginTransaction();
if ($dbversion == 0) {
    $db->run("
    CREATE TABLE `accounts` (
      `id` varbinary(128) NOT NULL,
      `public_key` varbinary(1024) NOT NULL,
      `block` varbinary(128) NOT NULL,
      `balance` decimal(20,8) NOT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 ROW_FORMAT=COMPACT;");

    $db->run("CREATE TABLE `blocks` (
      `id` varbinary(128) NOT NULL,
      `generator` varbinary(128) NOT NULL,
      `height` int(11) NOT NULL,
      `date` int(11) NOT NULL,
      `nonce` varbinary(128) NOT NULL,
      `signature` varbinary(256) NOT NULL,
      `difficulty` varchar(64) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
      `argon` varbinary(128) NOT NULL,
      `transactions` INT NOT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");

    $db->run("CREATE TABLE `config` (
      `cfg` varchar(30) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
      `val` varchar(200) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");


    $db->run("INSERT INTO `config` (`cfg`, `val`) VALUES
    ('hostname', '');");

    $db->run("INSERT INTO `config` (`cfg`, `val`) VALUES
    ('dbversion', '1');");

    $db->run("CREATE TABLE `mempool` (
      `id` varbinary(128) NOT NULL,
      `height` int(11) NOT NULL,
      `src` varbinary(128) NOT NULL,
      `dst` varbinary(128) NOT NULL,
      `val` decimal(20,8) NOT NULL,
      `fee` decimal(20,8) NOT NULL,
      `signature` varbinary(256) NOT NULL,
      `version` tinyint(4) NOT NULL,
      `message` varchar(256) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NULL DEFAULT '',
      `public_key` varbinary(1024) NOT NULL,
      `date` bigint(20) NOT NULL,
      `peer` varchar(64) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin DEFAULT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");

    $db->run("CREATE TABLE `peers` (
      `id` int(11) NOT NULL,
      `hostname` varchar(128) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
      `blacklisted` int(11) NOT NULL DEFAULT 0,
      `ping` int(11) NOT NULL,
      `reserve` tinyint(4) NOT NULL DEFAULT 1,
      `ip` varchar(45) NOT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");


    $db->run("CREATE TABLE `transactions` (
      `id` varbinary(128) NOT NULL,
      `block` varbinary(128) NOT NULL,
      `height` int(11) NOT NULL,
      `dst` varbinary(128) NOT NULL,
      `val` decimal(20,8) NOT NULL,
      `fee` decimal(20,8) NOT NULL,
      `signature` varbinary(256) NOT NULL,
      `version` tinyint(4) NOT NULL,
      `message` varchar(256) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NULL DEFAULT '',
      `date` int(11) NOT NULL,
      `public_key` varbinary(1024) NOT NULL
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");

    $db->run("ALTER TABLE `peers`
      ADD PRIMARY KEY (`id`);");
    $db->run("ALTER TABLE `peers`
      MODIFY `id` int(11) NOT NULL AUTO_INCREMENT;");

    $db->run("ALTER TABLE `accounts`
      ADD PRIMARY KEY (`id`),
      ADD KEY `accounts` (`block`);");

    $db->run("ALTER TABLE `blocks`
      ADD PRIMARY KEY (`id`),
      ADD UNIQUE KEY `height` (`height`);");

    $db->run("ALTER TABLE `config` ADD PRIMARY KEY (`cfg`);");

    $db->run("ALTER TABLE `mempool`
      ADD PRIMARY KEY (`id`),
      ADD KEY `height` (`height`);");

    $db->run("ALTER TABLE `peers`
      ADD UNIQUE KEY `hostname` (`hostname`),
      ADD UNIQUE KEY `ip` (`ip`),
      ADD KEY `blacklisted` (`blacklisted`),
      ADD KEY `ping` (`ping`),
      ADD KEY `reserve` (`reserve`);");

    $db->run("ALTER TABLE `transactions`
      ADD PRIMARY KEY (`id`),
      ADD KEY `block_id` (`block`);");

    $db->run("ALTER TABLE `accounts`
      ADD CONSTRAINT `accounts` FOREIGN KEY (`block`) REFERENCES `blocks` (`id`) ON DELETE CASCADE;");

    $db->run("ALTER TABLE `transactions`
      ADD CONSTRAINT `block_id` FOREIGN KEY (`block`) REFERENCES `blocks` (`id`) ON DELETE CASCADE;");

    $dbversion++;
}
if ($dbversion == 1) {
    $db->run("INSERT INTO `config` (`cfg`, `val`) VALUES ('sanity_last', '0');");
    $dbversion++;
}
if ($dbversion == 2) {
    $db->run("INSERT INTO `config` (`cfg`, `val`) VALUES ('sanity_sync', '0');");
    $dbversion++;
}
if ($dbversion == 3) {
    $dbversion++;
}

if ($dbversion == 4) {
    $db->run("ALTER TABLE `mempool` ADD INDEX(`src`);");
    $db->run("ALTER TABLE `mempool` ADD INDEX(`peer`); ");
    $db->run("ALTER TABLE `mempool` ADD INDEX(`val`); ");
    $dbversion++;
}
if ($dbversion == 5) {
    $db->run("ALTER TABLE `peers` ADD `fails` TINYINT NOT NULL DEFAULT '0' AFTER `ip`; ");
    $dbversion++;
}
if ($dbversion == 6) {
    $db->run("ALTER TABLE `peers` ADD `stuckfail` TINYINT(4) NOT NULL DEFAULT '0' AFTER `fails`, ADD INDEX (`stuckfail`); ");
    $db->run("ALTER TABLE `accounts` ADD `alias` VARCHAR(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NULL DEFAULT NULL AFTER `balance`; ");
    $dbversion++;
}
if ($dbversion == 7) {
    $db->run("ALTER TABLE `accounts` ADD INDEX(`alias`); ");
    $db->run("ALTER TABLE `transactions` ADD KEY `dst` (`dst`), ADD KEY `height` (`height`),  ADD KEY `public_key` (`public_key`);");
    $dbversion++;
}


// update the db version to the latest one
if ($dbversion != $_config['dbversion']) {
    $db->run("UPDATE config SET val=:val WHERE cfg='dbversion'", [":val" => $dbversion]);
}
$db->commit();