/*
 * shavit's Timer - SQL table creation and migrations
 * by: shavit, rtldg
 *
 * This file is part of shavit's Timer (https://github.com/shavitush/bhoptimer)
 *
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, version 3.0, as published by the
 * Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

enum
{
	Migration_RemoveWorkshopMaptiers, // 0
	Migration_RemoveWorkshopMapzones,
	Migration_RemoveWorkshopPlayertimes,
	Migration_LastLoginIndex,
	Migration_RemoveCountry,
	Migration_ConvertIPAddresses, // 5
	Migration_ConvertSteamIDsUsers,
	Migration_ConvertSteamIDsPlayertimes,
	Migration_ConvertSteamIDsChat,
	Migration_PlayertimesDateToInt,
	Migration_AddZonesFlagsAndData, // 10
	Migration_AddPlayertimesCompletions,
	Migration_AddCustomChatAccess,
	Migration_AddPlayertimesExactTimeInt,
	Migration_FixOldCompletionCounts, // old completions accidentally started at 2
	Migration_AddPrebuiltToMapZonesTable, // 15
	Migration_AddPlaytime,
	// sorry, this is kind of dumb but it's better than trying to manage which ones have
	// finished and which tables exist etc etc in a transaction or a completion counter...
	Migration_Lowercase_maptiers,
	Migration_Lowercase_mapzones,
	Migration_Lowercase_playertimes,
	Migration_Lowercase_stagetimeswr, // 20
	Migration_Lowercase_startpositions,
	Migration_AddPlayertimesPointsCalcedFrom, // points calculated from wr float added to playertimes
	Migration_RemovePlayertimesPointsCalcedFrom, // lol
	Migration_NormalizeMapzonePoints,
	Migration_AddMapzonesForm, // 25
	Migration_AddMapzonesTarget,
	Migration_DeprecateExactTimeInt,
	Migration_FixSQLiteMapzonesROWID,
	MIGRATIONS_END
};

static Database gH_SQL;
static int gI_Driver;
static char gS_SQLPrefix[32];

bool gB_MigrationsApplied[255];
char SQLiteMapzonesQuery[1024]; // used in Migration_FixSQLiteMapzonesROWID if db created <= v3.3.2

public void RunOnDatabaseLoadedForward()
{
	static GlobalForward hOnDatabasedLoaded;

	if (hOnDatabasedLoaded == null)
	{
		hOnDatabasedLoaded = new GlobalForward("Shavit_OnDatabaseLoaded", ET_Ignore);
	}

	Call_StartForward(hOnDatabasedLoaded);
	Call_Finish(hOnDatabasedLoaded);
}

public void SQL_CreateTables(Database hSQL, const char[] prefix, int driver)
{
	gH_SQL = hSQL;
	gI_Driver = driver;
	strcopy(gS_SQLPrefix, sizeof(gS_SQLPrefix), prefix);

	Transaction trans = new Transaction();

	char sQuery[2048];
	char sOptionalINNODB[16];

	if (driver == Driver_mysql)
	{
		sOptionalINNODB = "ENGINE=INNODB";
	}

	//
	//// shavit-core
	//

	if (driver == Driver_mysql)
	{
		FormatEx(sQuery, sizeof(sQuery),
			"CREATE TABLE IF NOT EXISTS `%susers` (`auth` INT NOT NULL, `name` VARCHAR(32) COLLATE 'utf8mb4_general_ci', `ip` INT, `lastlogin` INT NOT NULL DEFAULT -1, `points` FLOAT NOT NULL DEFAULT 0, `playtime` FLOAT NOT NULL DEFAULT 0, PRIMARY KEY (`auth`), INDEX `points` (`points`), INDEX `lastlogin` (`lastlogin`)) ENGINE=INNODB;",
			gS_SQLPrefix);
	}
	else
	{
		FormatEx(sQuery, sizeof(sQuery),
			"CREATE TABLE IF NOT EXISTS `%susers` (`auth` INT NOT NULL PRIMARY KEY, `name` VARCHAR(32), `ip` INT, `lastlogin` INTEGER NOT NULL DEFAULT -1, `points` FLOAT NOT NULL DEFAULT 0, `playtime` FLOAT NOT NULL DEFAULT 0);",
			gS_SQLPrefix);
	}

	AddQueryLog(trans, sQuery);

	FormatEx(sQuery, sizeof(sQuery),
		"CREATE TABLE IF NOT EXISTS `%smigrations` (`code` TINYINT NOT NULL, PRIMARY KEY (`code`));",
		gS_SQLPrefix);
	AddQueryLog(trans, sQuery);

	//
	//// shavit-chat
	//

	if (driver == Driver_mysql)
	{
		FormatEx(sQuery, sizeof(sQuery),
			"CREATE TABLE IF NOT EXISTS `%schat` (`auth` INT NOT NULL, `name` INT NOT NULL DEFAULT 0, `ccname` VARCHAR(128) COLLATE 'utf8mb4_unicode_ci', `message` INT NOT NULL DEFAULT 0, `ccmessage` VARCHAR(16) COLLATE 'utf8mb4_unicode_ci', `ccaccess` INT NOT NULL DEFAULT 0, PRIMARY KEY (`auth`), CONSTRAINT `%sch_auth` FOREIGN KEY (`auth`) REFERENCES `%susers` (`auth`) ON UPDATE CASCADE ON DELETE CASCADE) ENGINE=INNODB;",
			gS_SQLPrefix, gS_SQLPrefix, gS_SQLPrefix);
	}
	else
	{
		FormatEx(sQuery, sizeof(sQuery),
			"CREATE TABLE IF NOT EXISTS `%schat` (`auth` INT NOT NULL, `name` INT NOT NULL DEFAULT 0, `ccname` VARCHAR(128), `message` INT NOT NULL DEFAULT 0, `ccmessage` VARCHAR(16), `ccaccess` INT NOT NULL DEFAULT 0, PRIMARY KEY (`auth`), CONSTRAINT `%sch_auth` FOREIGN KEY (`auth`) REFERENCES `%susers` (`auth`) ON UPDATE CASCADE ON DELETE CASCADE);",
			gS_SQLPrefix, gS_SQLPrefix, gS_SQLPrefix);
	}

	AddQueryLog(trans, sQuery);

	//
	//// shavit-rankings
	//

	FormatEx(sQuery, sizeof(sQuery),
		"CREATE TABLE IF NOT EXISTS `%smaptiers` (`map` VARCHAR(255) NOT NULL, `tier` INT NOT NULL DEFAULT 1, PRIMARY KEY (`map`)) %s;",
		gS_SQLPrefix, sOptionalINNODB);
	AddQueryLog(trans, sQuery);

	//
	//// shavit-stats
	//

	FormatEx(sQuery, sizeof(sQuery),
		"CREATE TABLE IF NOT EXISTS `%sstyleplaytime` (`auth` INT NOT NULL, `style` TINYINT NOT NULL, `playtime` FLOAT NOT NULL, PRIMARY KEY (`auth`, `style`));",
		gS_SQLPrefix);
	AddQueryLog(trans, sQuery);

	//
	//// shavit-wr
	//

	if (driver == Driver_mysql)
	{
		FormatEx(sQuery, sizeof(sQuery),
			"CREATE TABLE IF NOT EXISTS `%splayertimes` (`id` INT NOT NULL AUTO_INCREMENT, `style` TINYINT NOT NULL DEFAULT 0, `track` TINYINT NOT NULL DEFAULT 0, `time` FLOAT NOT NULL, `auth` INT NOT NULL, `map` VARCHAR(255) NOT NULL, `points` FLOAT NOT NULL DEFAULT 0, `jumps` INT, `date` INT, `strafes` INT, `sync` FLOAT, `perfs` FLOAT DEFAULT 0, `completions` SMALLINT DEFAULT 1, PRIMARY KEY (`id`), INDEX `map` (`map`, `style`, `track`, `time`), INDEX `auth` (`auth`, `date`, `points`), INDEX `time` (`time`), INDEX `map2` (`map`)) ENGINE=INNODB;",
			gS_SQLPrefix);
	}
	else
	{
		// id  style  track  time  auth  map  points  exact_time_int
		FormatEx(sQuery, sizeof(sQuery),
			"CREATE TABLE IF NOT EXISTS `%splayertimes` (`id` INTEGER PRIMARY KEY, `style` TINYINT NOT NULL DEFAULT 0, `track` TINYINT NOT NULL DEFAULT 0, `time` FLOAT NOT NULL, `auth` INT NOT NULL, `map` VARCHAR(255) NOT NULL, `points` FLOAT NOT NULL DEFAULT 0, `jumps` INT, `date` INT, `strafes` INT, `sync` FLOAT, `perfs` FLOAT DEFAULT 0, `completions` SMALLINT DEFAULT 1);",
			gS_SQLPrefix);
	}

	AddQueryLog(trans, sQuery);

	FormatEx(sQuery, sizeof(sQuery),
		"CREATE TABLE IF NOT EXISTS `%sstagetimeswr` (`style` TINYINT NOT NULL, `track` TINYINT NOT NULL DEFAULT 0, `map` VARCHAR(255) NOT NULL, `stage` TINYINT NOT NULL, `auth` INT NOT NULL, `time` FLOAT NOT NULL, PRIMARY KEY (`style`, `track`, `map`, `stage`)) %s;",
		gS_SQLPrefix, sOptionalINNODB);
	AddQueryLog(trans, sQuery);

	FormatEx(sQuery, sizeof(sQuery),
		"CREATE TABLE IF NOT EXISTS `%sstagetimespb` (`style` TINYINT NOT NULL, `track` TINYINT NOT NULL DEFAULT 0, `map` VARCHAR(255) NOT NULL, `stage` TINYINT NOT NULL, `auth` INT NOT NULL, `time` FLOAT NOT NULL, PRIMARY KEY (`style`, `track`, `auth`, `map`, `stage`)) %s;",
		gS_SQLPrefix, sOptionalINNODB);
	AddQueryLog(trans, sQuery);

	if (driver == Driver_sqlite)
	{
		FormatEx(sQuery, sizeof(sQuery), "DROP VIEW IF EXISTS %swrs;", gS_SQLPrefix);
		AddQueryLog(trans, sQuery);
		FormatEx(sQuery, sizeof(sQuery), "DROP VIEW IF EXISTS %swrs_min;", gS_SQLPrefix);
		AddQueryLog(trans, sQuery);
	}

	FormatEx(sQuery, sizeof(sQuery),
		"%s %swrs_min AS SELECT MIN(time) time, map, track, style FROM %splayertimes GROUP BY map, track, style;",
		driver == Driver_sqlite ? "CREATE VIEW IF NOT EXISTS" : "CREATE OR REPLACE VIEW",
		gS_SQLPrefix, gS_SQLPrefix);
	AddQueryLog(trans, sQuery);

	FormatEx(sQuery, sizeof(sQuery),
		"%s %swrs AS SELECT a.* FROM %splayertimes a JOIN %swrs_min b ON a.time = b.time AND a.map = b.map AND a.track = b.track AND a.style = b.style;",
		driver == Driver_sqlite ? "CREATE VIEW IF NOT EXISTS" : "CREATE OR REPLACE VIEW",
		gS_SQLPrefix, gS_SQLPrefix, gS_SQLPrefix);
	AddQueryLog(trans, sQuery);

	//
	//// shavit-wr
	//

	if (driver == Driver_mysql)
	{
		FormatEx(sQuery, sizeof(sQuery),
			"CREATE TABLE IF NOT EXISTS `%smapzones` (`id` INT AUTO_INCREMENT, `map` VARCHAR(255) NOT NULL, `type` INT, `corner1_x` FLOAT, `corner1_y` FLOAT, `corner1_z` FLOAT, `corner2_x` FLOAT, `corner2_y` FLOAT, `corner2_z` FLOAT, `destination_x` FLOAT NOT NULL DEFAULT 0, `destination_y` FLOAT NOT NULL DEFAULT 0, `destination_z` FLOAT NOT NULL DEFAULT 0, `track` INT NOT NULL DEFAULT 0, `flags` INT NOT NULL DEFAULT 0, `data` INT NOT NULL DEFAULT 0, `form` TINYINT, `target` VARCHAR(63), PRIMARY KEY (`id`)) %s;",
			gS_SQLPrefix, sOptionalINNODB);
		AddQueryLog(trans, sQuery);
	}
	else
	{
		FormatEx(sQuery, sizeof(sQuery),
			"CREATE TABLE IF NOT EXISTS `%smapzones` (`id` INTEGER PRIMARY KEY, `map` VARCHAR(255) NOT NULL, `type` INT, `corner1_x` FLOAT, `corner1_y` FLOAT, `corner1_z` FLOAT, `corner2_x` FLOAT, `corner2_y` FLOAT, `corner2_z` FLOAT, `destination_x` FLOAT NOT NULL DEFAULT 0, `destination_y` FLOAT NOT NULL DEFAULT 0, `destination_z` FLOAT NOT NULL DEFAULT 0, `track` INT NOT NULL DEFAULT 0, `flags` INT NOT NULL DEFAULT 0, `data` INT NOT NULL DEFAULT 0, `form` TINYINT, `target` VARCHAR(63));",
			gS_SQLPrefix);
		AddQueryLog(trans, sQuery);
		strcopy(SQLiteMapzonesQuery, sizeof(SQLiteMapzonesQuery), sQuery);
	}

	FormatEx(sQuery, sizeof(sQuery),
		"CREATE TABLE IF NOT EXISTS `%sstartpositions` (`auth` INTEGER NOT NULL, `track` TINYINT NOT NULL, `map` VARCHAR(255) NOT NULL, `pos_x` FLOAT, `pos_y` FLOAT, `pos_z` FLOAT, `ang_x` FLOAT, `ang_y` FLOAT, `ang_z` FLOAT, `angles_only` BOOL, PRIMARY KEY (`auth`, `track`, `map`)) %s;",
		gS_SQLPrefix, sOptionalINNODB);
	AddQueryLog(trans, sQuery);

	hSQL.Execute(trans, Trans_CreateTables_Success, Trans_CreateTables_Error, 0, DBPrio_High);
}

public void Trans_CreateTables_Error(Database db, any data, int numQueries, const char[] error, int failIndex, any[] queryData)
{
	static char tablenames[][32] = {
		"users",
		"migrations",
		"chat",
		"maptiers",
		"styleplaytime",
		"playertimes",
		"stagetimeswr",
		"stagetimespb",
		"wrs_min",
		"wrs",
		"mapzones",
		"startpositions",
	};

	if (0 <= failIndex < sizeof(tablenames))
	{
		LogError("Timer failed to create sql table %s. Reason: %s", tablenames[failIndex], error);
	}
	else
	{
		LogError("Timer failed to create sql tables. failIndex=%d. numQueries=%d. Reason: %s", failIndex, numQueries, error);
	}
}

public void Trans_CreateTables_Success(Database db, any data, int numQueries, DBResultSet[] results, any[] queryData)
{
	char sQuery[128];
	FormatEx(sQuery, 128, "SELECT code FROM %smigrations;", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_SelectMigrations_Callback, sQuery, 0, DBPrio_High);
}

public void SQL_SelectMigrations_Callback(Database db, DBResultSet results, const char[] error, any data)
{
	if (results == null)
	{
		LogError("Timer error! Migrations selection failed. Reason: %s", error);

		return;
	}

	// this is ugly, i know. but it works and is more elegant than previous solutions so.. let it be =)
	bool bMigrationApplied[255] = { false, ... };

	while (results.FetchRow())
	{
		bMigrationApplied[results.FetchInt(0)] = true;
	}

	gB_MigrationsApplied = bMigrationApplied;
	DoNextMigration();
}

void DoNextMigration()
{
	for (int i = 0; i < MIGRATIONS_END; i++)
	{
		if (!gB_MigrationsApplied[i])
		{
			gB_MigrationsApplied[i] = true;
			PrintToServer("--- Applying database migration %d ---", i);
			ApplyMigration(i);
			return;
		}
	}

	RunOnDatabaseLoadedForward();
}

void ApplyMigration(int migration)
{
	switch (migration)
	{
		case Migration_RemoveWorkshopMaptiers, Migration_RemoveWorkshopMapzones, Migration_RemoveWorkshopPlayertimes: ApplyMigration_RemoveWorkshopPath(migration);
		case Migration_LastLoginIndex: ApplyMigration_LastLoginIndex();
		case Migration_RemoveCountry: ApplyMigration_RemoveCountry();
		case Migration_ConvertIPAddresses: ApplyMigration_ConvertIPAddresses();
		case Migration_ConvertSteamIDsUsers: ApplyMigration_ConvertSteamIDs();
		case Migration_ConvertSteamIDsPlayertimes, Migration_ConvertSteamIDsChat: return; // this is confusing, but the above case handles all of them
		case Migration_PlayertimesDateToInt: ApplyMigration_PlayertimesDateToInt();
		case Migration_AddZonesFlagsAndData: ApplyMigration_AddZonesFlagsAndData();
		case Migration_AddPlayertimesCompletions: ApplyMigration_AddPlayertimesCompletions();
		case Migration_AddCustomChatAccess: ApplyMigration_AddCustomChatAccess();
		case Migration_AddPlayertimesExactTimeInt: ApplyMigration_AddPlayertimesExactTimeInt();
		case Migration_FixOldCompletionCounts: ApplyMigration_FixOldCompletionCounts();
		case Migration_AddPrebuiltToMapZonesTable: ApplyMigration_AddPrebuiltToMapZonesTable();
		case Migration_AddPlaytime: ApplyMigration_AddPlaytime();
		case Migration_Lowercase_maptiers: ApplyMigration_LowercaseMaps("maptiers", migration);
		case Migration_Lowercase_mapzones: ApplyMigration_LowercaseMaps("mapzones", migration);
		case Migration_Lowercase_playertimes: ApplyMigration_LowercaseMaps("playertimes", migration);
		case Migration_Lowercase_stagetimeswr: ApplyMigration_LowercaseMaps("stagetimewrs", migration);
		case Migration_Lowercase_startpositions: ApplyMigration_LowercaseMaps("startpositions", migration);
		case Migration_AddPlayertimesPointsCalcedFrom: ApplyMigration_AddPlayertimesPointsCalcedFrom();
		case Migration_RemovePlayertimesPointsCalcedFrom: ApplyMigration_RemovePlayertimesPointsCalcedFrom();
		case Migration_NormalizeMapzonePoints: ApplyMigration_NormalizeMapzonePoints();
		case Migration_AddMapzonesForm: ApplyMigration_AddMapzonesForm();
		case Migration_AddMapzonesTarget: ApplyMigration_AddMapzonesTarget();
		case Migration_DeprecateExactTimeInt: ApplyMigration_DeprecateExactTimeInt();
		case Migration_FixSQLiteMapzonesROWID: ApplyMigration_FixSQLiteMapzonesROWID();
	}
}

void ApplyMigration_LastLoginIndex()
{
	char sQuery[128];
	FormatEx(sQuery, 128, "ALTER TABLE `%susers` ADD INDEX `lastlogin` (`lastlogin`);", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_LastLoginIndex, DBPrio_High);
}

void ApplyMigration_RemoveCountry()
{
	char sQuery[128];
	FormatEx(sQuery, 128, "ALTER TABLE `%susers` DROP COLUMN `country`;", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_RemoveCountry, DBPrio_High);
}

void ApplyMigration_PlayertimesDateToInt()
{
	char sQuery[128];
	FormatEx(sQuery, 128, "ALTER TABLE `%splayertimes` CHANGE COLUMN `date` `date` INT;", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_PlayertimesDateToInt, DBPrio_High);
}

void ApplyMigration_AddZonesFlagsAndData()
{
	char sQuery[192];
	FormatEx(sQuery, 192, "ALTER TABLE `%smapzones` ADD COLUMN `flags` INT NULL AFTER `track`, ADD COLUMN `data` INT NULL AFTER `flags`;", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_AddZonesFlagsAndData, DBPrio_High);
}

void ApplyMigration_AddPlayertimesCompletions()
{
	char sQuery[192];
	FormatEx(sQuery, 192, "ALTER TABLE `%splayertimes` ADD COLUMN `completions` SMALLINT DEFAULT 1 AFTER `perfs`;", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_AddPlayertimesCompletions, DBPrio_High);
}

void ApplyMigration_AddCustomChatAccess()
{
	char sQuery[192];
	FormatEx(sQuery, 192, "ALTER TABLE `%schat` ADD COLUMN `ccaccess` INT NOT NULL DEFAULT 0 %s;", gS_SQLPrefix, (gI_Driver == Driver_mysql) ? "AFTER `ccmessage`" : "");
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_AddCustomChatAccess, DBPrio_High);
}

void ApplyMigration_AddPlayertimesExactTimeInt()
{
#if 0
	char sQuery[192];
	FormatEx(sQuery, 192, "ALTER TABLE `%splayertimes` ADD COLUMN `exact_time_int` INT NOT NULL DEFAULT 0 %s;", gS_SQLPrefix, (gI_Driver == Driver_mysql) ? "AFTER `completions`" : "");
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_AddPlayertimesExactTimeInt, DBPrio_High);
#else
	SQL_TableMigrationSingleQuery_Callback(null, null, "", Migration_AddPlayertimesExactTimeInt);
#endif
}

void ApplyMigration_FixOldCompletionCounts()
{
	char sQuery[192];
	FormatEx(sQuery, 192, "UPDATE `%splayertimes` SET completions = completions - 1 WHERE completions > 1;", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_FixOldCompletionCounts, DBPrio_High);
}

void ApplyMigration_AddPrebuiltToMapZonesTable()
{
#if 0
	char sQuery[192];
	FormatEx(sQuery, 192, "ALTER TABLE `%smapzones` ADD COLUMN `prebuilt` BOOL;", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_AddPrebuiltToMapZonesTable, DBPrio_High);
#else
	SQL_TableMigrationSingleQuery_Callback(null, null, "", Migration_AddPrebuiltToMapZonesTable);
#endif
}

// double up on this migration because some people may have used shavit-playtime which uses INT but I want FLOAT
void ApplyMigration_AddPlaytime()
{
	char sQuery[192];
	FormatEx(sQuery, 192, "ALTER TABLE `%susers` MODIFY COLUMN `playtime` FLOAT NOT NULL DEFAULT 0;", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_Migration_AddPlaytime2222222_Callback, sQuery, Migration_AddPlaytime, DBPrio_High);
}

public void SQL_Migration_AddPlaytime2222222_Callback(Database db, DBResultSet results, const char[] error, any data)
{
	char sQuery[192];
	FormatEx(sQuery, 192, "ALTER TABLE `%susers` ADD COLUMN `playtime` FLOAT NOT NULL DEFAULT 0 %s;", gS_SQLPrefix, (gI_Driver == Driver_mysql) ? "AFTER `points`" : "");
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_AddPlaytime, DBPrio_High);
}

void ApplyMigration_LowercaseMaps(const char[] table, int migration)
{
	char sQuery[192];
	FormatEx(sQuery, 192, "UPDATE `%s%s` SET map = LOWER(map);", gS_SQLPrefix, table);
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, migration, DBPrio_High);
}

void ApplyMigration_AddPlayertimesPointsCalcedFrom()
{
#if 0
	char sQuery[192];
	FormatEx(sQuery, 192, "ALTER TABLE `%splayertimes` ADD COLUMN `points_calced_from` FLOAT NOT NULL DEFAULT 0 %s;", gS_SQLPrefix, (gI_Driver == Driver_mysql) ? "AFTER `points`" : "");
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_AddPlayertimesPointsCalcedFrom, DBPrio_High);
#else
	SQL_TableMigrationSingleQuery_Callback(null, null, "", Migration_AddPlayertimesPointsCalcedFrom);
#endif
}

void ApplyMigration_RemovePlayertimesPointsCalcedFrom()
{
	char sQuery[192];
	FormatEx(sQuery, 192, "ALTER TABLE `%splayertimes` DROP COLUMN `points_calced_from`;", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_RemovePlayertimesPointsCalcedFrom, DBPrio_High);
}

void ApplyMigration_NormalizeMapzonePoints() // TODO: test with sqlite lol
{
	char sQuery[666], greatest[16], least[16], id[16];
	greatest = (gI_Driver != Driver_sqlite) ? "GREATEST" : "MAX";
	least = (gI_Driver != Driver_sqlite) ? "LEAST" : "MIN";
	id = (gI_Driver != Driver_sqlite) ? "id" : "rowid";

	FormatEx(sQuery, sizeof(sQuery),
		"UPDATE `%smapzones` A, `%smapzones` B SET \
		A.corner1_x=%s(B.corner1_x, B.corner2_x), \
		A.corner1_y=%s(B.corner1_y, B.corner2_y), \
		A.corner1_z=%s(B.corner1_z, B.corner2_z), \
		A.corner2_x=%s(B.corner1_x, B.corner2_x), \
		A.corner2_y=%s(B.corner1_y, B.corner2_y), \
		A.corner2_z=%s(B.corner1_z, B.corner2_z)  \
		WHERE A.%s = B.%s;",
		gS_SQLPrefix, gS_SQLPrefix,
		least, least, least,
		greatest, greatest, greatest,
		id, id
	);

	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_NormalizeMapzonePoints, DBPrio_High);
}

void ApplyMigration_AddMapzonesForm()
{
	char sQuery[192];
	FormatEx(sQuery, sizeof(sQuery), "ALTER TABLE `%smapzones` ADD COLUMN `form` TINYINT;", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_AddMapzonesForm, DBPrio_High);
}

void ApplyMigration_AddMapzonesTarget()
{
	char sQuery[192];
	FormatEx(sQuery, sizeof(sQuery), "ALTER TABLE `%smapzones` ADD COLUMN `target` VARCHAR(63);", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_AddMapzonesTarget, DBPrio_High);
}

void ApplyMigration_DeprecateExactTimeInt()
{
	char query[256];
	FormatEx(query, sizeof(query), "SELECT id, exact_time_int FROM %splayertimes WHERE exact_time_int != 0;", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_Migration_DeprecateExactTimeInt_Query, query);
}

public void SQL_Migration_DeprecateExactTimeInt_Query(Database db, DBResultSet results, const char[] error, any data)
{
	if (results == null || results.RowCount == 0)
	{
		InsertMigration(Migration_DeprecateExactTimeInt);
		return;
	}

	ArrayStack stack = new ArrayStack(2);

	while (results.FetchRow())
	{
		int things[2];
		things[0] = results.FetchInt(0);
		things[1] = results.FetchInt(1);
		stack.PushArray(things);
	}

	SQL_Migration_DeprecateExactTimeInt_Main(stack);
}

void SQL_Migration_DeprecateExactTimeInt_Main(ArrayStack stack)
{
	Transaction trans = new Transaction();
	int queries = 0;

	while (!stack.Empty)
	{
		int things[2];
		stack.PopArray(things);
		char query[512];
		FormatEx(query, sizeof(query),
			"UPDATE %splayertimes SET time = %.9f WHERE id = %d;",
			gS_SQLPrefix, things[1], things[0]);
		AddQueryLog(trans, query);

		if (++queries > 9000)
			break;
	}

	if (stack.Empty)
		delete stack;

	gH_SQL.Execute(trans, Trans_DeprecateExactTimeIntSuccess, Trans_DeprecateExactTimeIntFailed, stack);
}

public void Trans_DeprecateExactTimeIntSuccess(Database db, ArrayStack stack, int numQueries, DBResultSet[] results, any[] queryData)
{
	if (!stack)
	{
		InsertMigration(Migration_DeprecateExactTimeInt);
		return;
	}

	SQL_Migration_DeprecateExactTimeInt_Main(stack);
}

public void Trans_DeprecateExactTimeIntFailed(Database db, ArrayStack stack, int numQueries, const char[] error, int failIndex, any[] queryData)
{
	delete stack;
	LogError("Timer (core) error! ExactTimeInt migration failed. %d %d Reason: %s", numQueries, failIndex, error);
}

void ApplyMigration_FixSQLiteMapzonesROWID()
{
	if (gI_Driver != Driver_sqlite)
	{
		InsertMigration(Migration_FixSQLiteMapzonesROWID);
		return;
	}

	char sQuery[256];
	FormatEx(sQuery, sizeof(sQuery), "SELECT EXISTS(SELECT 1 FROM `%smapzones` WHERE id IS NULL);", gS_SQLPrefix);

	QueryLog(gH_SQL, SQL_FixSQLiteMapzonesROWID_Callback, sQuery, 0, DBPrio_High);
}

public void SQL_FixSQLiteMapzonesROWID_Callback(Database db, DBResultSet results, const char[] error, any data)
{
	if (results == null)
	{
		LogError("Timer error! SQLiteMapzonesROWID migration failed. Reason: %s", error);
		return;
	}
}

public void SQL_TableMigrationSingleQuery_Callback(Database db, DBResultSet results, const char[] error, any data)
{
	InsertMigration(data);

	// i hate hardcoding REEEEEEEE
	if (data == Migration_ConvertSteamIDsChat)
	{
		char sQuery[256];
		// deleting rows that cause data integrity issues
		FormatEx(sQuery, 256,
			"DELETE t1 FROM %splayertimes t1 LEFT JOIN %susers t2 ON t1.auth = t2.auth WHERE t2.auth IS NULL;",
			gS_SQLPrefix, gS_SQLPrefix);
		QueryLog(gH_SQL, SQL_TableMigrationIndexing_Callback, sQuery, 0, DBPrio_High);

#if 0
		FormatEx(sQuery, 256,
			"ALTER TABLE `%splayertimes` ADD CONSTRAINT `%spt_auth` FOREIGN KEY (`auth`) REFERENCES `%susers` (`auth`) ON UPDATE CASCADE ON DELETE CASCADE;",
			gS_SQLPrefix, gS_SQLPrefix, gS_SQLPrefix);
		QueryLog(gH_SQL, SQL_TableMigrationIndexing_Callback, sQuery);
#endif

		FormatEx(sQuery, 256,
			"DELETE t1 FROM %schat t1 LEFT JOIN %susers t2 ON t1.auth = t2.auth WHERE t2.auth IS NULL;",
			gS_SQLPrefix, gS_SQLPrefix);
		QueryLog(gH_SQL, SQL_TableMigrationIndexing_Callback, sQuery, 0, DBPrio_High);

#if 0
		FormatEx(sQuery, 256,
			"ALTER TABLE `%schat` ADD CONSTRAINT `%sch_auth` FOREIGN KEY (`auth`) REFERENCES `%susers` (`auth`) ON UPDATE CASCADE ON DELETE CASCADE;",
			gS_SQLPrefix, gS_SQLPrefix, gS_SQLPrefix);
		QueryLog(gH_SQL, SQL_TableMigrationIndexing_Callback, sQuery);
#endif
	}
}

void ApplyMigration_ConvertIPAddresses(bool index = true)
{
	char sQuery[128];

	if (index)
	{
		FormatEx(sQuery, 128, "ALTER TABLE `%susers` ADD INDEX `ip` (`ip`);", gS_SQLPrefix);
		QueryLog(gH_SQL, SQL_TableMigrationIndexing_Callback, sQuery, 0, DBPrio_High);
	}

	FormatEx(sQuery, 128, "SELECT DISTINCT ip FROM %susers WHERE ip LIKE '%%.%%';", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationIPAddresses_Callback, sQuery);
}

public void SQL_TableMigrationIPAddresses_Callback(Database db, DBResultSet results, const char[] error, DataPack data)
{
	if (results == null || results.RowCount == 0)
	{
		InsertMigration(Migration_ConvertIPAddresses);

		return;
	}

	Transaction trans = new Transaction();
	int iQueries = 0;

	while (results.FetchRow())
	{
		char sIPAddress[32];
		results.FetchString(0, sIPAddress, 32);

		char sQuery[256];
		FormatEx(sQuery, 256, "UPDATE %susers SET ip = %d WHERE ip = '%s';", gS_SQLPrefix, IPStringToAddress(sIPAddress), sIPAddress);

		AddQueryLog(trans, sQuery);

		if (++iQueries >= 10000)
		{
			break;
		}
	}

	gH_SQL.Execute(trans, Trans_IPAddressMigrationSuccess, Trans_IPAddressMigrationFailed, iQueries);
}

public void Trans_IPAddressMigrationSuccess(Database db, any data, int numQueries, DBResultSet[] results, any[] queryData)
{
	// too many queries, don't do all at once to avoid server crash due to too many queries in the transaction
	if (data >= 10000)
	{
		ApplyMigration_ConvertIPAddresses(false);

		return;
	}

	char sQuery[128];
	FormatEx(sQuery, 128, "ALTER TABLE `%susers` DROP INDEX `ip`;", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationIndexing_Callback, sQuery, 0, DBPrio_High);

	FormatEx(sQuery, 128, "ALTER TABLE `%susers` CHANGE COLUMN `ip` `ip` INT;", gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, Migration_ConvertIPAddresses, DBPrio_High);
}

public void Trans_IPAddressMigrationFailed(Database db, any data, int numQueries, const char[] error, int failIndex, any[] queryData)
{
	LogError("Timer (core) error! IP address migration failed. Reason: %s", error);
}

void ApplyMigration_ConvertSteamIDs()
{
	char sTables[][] =
	{
		"users",
		"playertimes",
		"chat"
	};

	char sQuery[128];
	FormatEx(sQuery, 128, "ALTER TABLE `%splayertimes` DROP CONSTRAINT `%spt_auth`;", gS_SQLPrefix, gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationIndexing_Callback, sQuery, 0, DBPrio_High);

	FormatEx(sQuery, 128, "ALTER TABLE `%schat` DROP CONSTRAINT `%sch_auth`;", gS_SQLPrefix, gS_SQLPrefix);
	QueryLog(gH_SQL, SQL_TableMigrationIndexing_Callback, sQuery, 0, DBPrio_High);

	for (int i = 0; i < sizeof(sTables); i++)
	{
		DataPack hPack = new DataPack();
		hPack.WriteCell(Migration_ConvertSteamIDsUsers + i);
		hPack.WriteString(sTables[i]);

		FormatEx(sQuery, 128, "UPDATE %s%s SET auth = REPLACE(REPLACE(auth, \"[U:1:\", \"\"), \"]\", \"\") WHERE auth LIKE '[%%';", sTables[i], gS_SQLPrefix);
		QueryLog(gH_SQL, SQL_TableMigrationSteamIDs_Callback, sQuery, hPack, DBPrio_High);
	}
}

public void SQL_TableMigrationIndexing_Callback(Database db, DBResultSet results, const char[] error, DataPack data)
{
	// nothing
}

public void SQL_TableMigrationSteamIDs_Callback(Database db, DBResultSet results, const char[] error, DataPack data)
{
	data.Reset();
	int iMigration = data.ReadCell();
	char sTable[16];
	data.ReadString(sTable, 16);
	delete data;

	char sQuery[128];
	FormatEx(sQuery, 128, "ALTER TABLE `%s%s` CHANGE COLUMN `auth` `auth` INT;", gS_SQLPrefix, sTable);
	QueryLog(gH_SQL, SQL_TableMigrationSingleQuery_Callback, sQuery, iMigration, DBPrio_High);
}

void ApplyMigration_RemoveWorkshopPath(int migration)
{
	char sTables[][] =
	{
		"maptiers",
		"mapzones",
		"playertimes"
	};

	DataPack hPack = new DataPack();
	hPack.WriteCell(migration);
	hPack.WriteString(sTables[migration]);

	char sQuery[192];
	FormatEx(sQuery, 192, "SELECT map FROM %s%s WHERE map LIKE 'workshop%%' GROUP BY map;", gS_SQLPrefix, sTables[migration]);
	QueryLog(gH_SQL, SQL_TableMigrationWorkshop_Callback, sQuery, hPack, DBPrio_High);
}

public void SQL_TableMigrationWorkshop_Callback(Database db, DBResultSet results, const char[] error, DataPack data)
{
	data.Reset();
	int iMigration = data.ReadCell();
	char sTable[16];
	data.ReadString(sTable, 16);
	delete data;

	if (results == null || results.RowCount == 0)
	{
		// no error logging here because not everyone runs the rankings/wr modules
		InsertMigration(iMigration);

		return;
	}

	Transaction trans = new Transaction();

	while (results.FetchRow())
	{
		char sMap[PLATFORM_MAX_PATH];
		results.FetchString(0, sMap, sizeof(sMap));

		char sDisplayMap[PLATFORM_MAX_PATH];
		GetMapDisplayName(sMap, sDisplayMap, sizeof(sDisplayMap));

		char sQuery[256];
		FormatEx(sQuery, 256, "UPDATE %s%s SET map = '%s' WHERE map = '%s';", gS_SQLPrefix, sTable, sDisplayMap, sMap);

		AddQueryLog(trans, sQuery);
	}

	gH_SQL.Execute(trans, Trans_WorkshopMigration, INVALID_FUNCTION, iMigration);
}

public void Trans_WorkshopMigration(Database db, any data, int numQueries, DBResultSet[] results, any[] queryData)
{
	InsertMigration(data);
}

void InsertMigration(int migration)
{
	char sQuery[128];
	FormatEx(sQuery, 128, "INSERT INTO %smigrations (code) VALUES (%d);", gS_SQLPrefix, migration);
	QueryLog(gH_SQL, SQL_MigrationApplied_Callback, sQuery, migration);
}

public void SQL_MigrationApplied_Callback(Database db, DBResultSet results, const char[] error, any data)
{
	DoNextMigration();
}