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package ch.asynk.rustanddust.util;
import java.security.MessageDigest;
import java.math.BigInteger;
import com.badlogic.gdx.sql.Database;
import com.badlogic.gdx.sql.DatabaseCursor;
import com.badlogic.gdx.sql.DatabaseFactory;
import com.badlogic.gdx.sql.SQLiteGdxException;
import ch.asynk.rustanddust.RustAndDust;
public class DB
{
private static final int DB_SCHEMA_VERSION = 1;
public static final int NO_RECORDS = -1;
private static final String DIGEST = "SHA-256";
private Database db;
private MessageDigest md;
private static final String TBL_CFG_CRT = "create table if not exists"
+ " config ( key text primary key, value text not null);"
+ " insert or ignore into config values(\"version\", " + DB_SCHEMA_VERSION + ");";
private static final String TBL_PLAYERS_CRT = "create table if not exists"
+ " players ( _id integer primary key autoincrement,"
+ " hash text unique not null, gmail text unique not null, firstname text, lastname text"
+ ");";
private static final String TBL_BATTLES_CRT = "create table if not exists"
+ " battles ( _id integer primary key, name text"
+ ");";
private static final String TBL_GAMES_CRT = "create table if not exists"
+ " games ( _id integer primary key autoincrement,"
+ " _p1 integer not null, _p2 integer not null, _b integer not null,"
+ " m integer not null, ts datetime default current_timestamp,"
+ " foreign key (_p1) references players(_id),"
+ " foreign key (_p2) references players(_id),"
+ " foreign key (_b) references battles(_id),"
+ " unique (_p1, _p2, _b)"
+ ");";
private static final String TBL_TURNS_CRT = "create table if not exists"
+ " turns ( _id integer primary key autoincrement, _g integer not null,"
+ " _p integer not null, hash text not null, payload text not null,"
+ " foreign key (_g) references games(_id),"
+ " foreign key (_p) references players(_id)"
+ ");";
private static final String TBL_STATES_CRT = "create table if not exists"
+ " states ( _g integer unique not null,"
+ " hash text not null, payload text not null,"
+ " foreign key (_g) references games(_id)"
+ ");";
private static final String INSERT_PLAYER = "insert or ignore into players(hash,gmail,firstname,lastname) values ('%s','%s','%s','%s');";
private static final String GET_PLAYER_ID = "select _id from players where hash='%s';";
private static final String UPDATE_BATTLE = "insert or replace into battles values (%d,'%s');";
private static final String INSERT_GAME = "insert or ignore into games(_p1,_p2,_b,m) values (%d,%d,%d,%d);";
private static final String GET_GAME_ID = "select _id from games where _p1=%d and _p2=%d and _b=%d;";
private static final String INSERT_TURN = "insert into turns(_g,_p,hash,payload) values (%d,%d,'%s','%s'); update games set ts=current_timestamp where _id=%d;";
private static final String INSERT_STATE = "insert or replace into states(_g,hash,payload) values (%d,'%s','%s'); update games set ts=current_timestamp where _id=%d;";
private static final String GET_STATE = "select payload from states where _g=%d;";
private static final String DB_CRT = TBL_CFG_CRT + TBL_PLAYERS_CRT + TBL_BATTLES_CRT + TBL_GAMES_CRT + TBL_TURNS_CRT + TBL_STATES_CRT;
public DB(String dbPath)
{
db = DatabaseFactory.getNewDatabase(dbPath, DB_SCHEMA_VERSION, DB_CRT, null);
db.setupDatabase();
}
public void setup()
{
try {
md = MessageDigest.getInstance(DIGEST);
} catch (java.security.NoSuchAlgorithmException e) { RustAndDust.error("NoSuchAlgorithm"); }
try {
db.openOrCreateDatabase();
} catch (SQLiteGdxException e) { RustAndDust.error("openOrCreateDatabase"); }
}
private String getDigest(String str)
{
String hash = null;
try {
hash = new BigInteger(1, md.digest(str.getBytes("UTF-8"))).toString(16);
} catch (java.io.UnsupportedEncodingException e) { RustAndDust.error("getDigest"); }
return hash;
}
public String storePlayer(String gmail, String firstname, String lastname)
{
String hash = getDigest(gmail + firstname + lastname);
if (hash == null) return null;
try {
db.execSQL(String.format(INSERT_PLAYER, hash, gmail, firstname, lastname));
} catch (SQLiteGdxException e) {
RustAndDust.error("storePlayer");
return null;
}
return hash;
}
public int getPlayerId(String hash)
{
int ret = NO_RECORDS;
try {
DatabaseCursor cursor = db.rawQuery(String.format(GET_PLAYER_ID, hash));
if (cursor.getCount() > 0) {
cursor.next();
ret = cursor.getInt(0);
}
} catch (SQLiteGdxException e) { RustAndDust.error("getPlayerId"); }
return ret;
}
public int storePlayerGetId(String gmail, String firstname, String lastname)
{
String hash = storePlayer(gmail, firstname, lastname);
if (hash == null) return NO_RECORDS;
return getPlayerId(hash);
}
public void storeBattle(int id, String name)
{
try {
db.execSQL(String.format(UPDATE_BATTLE, id, name));
} catch (SQLiteGdxException e) { RustAndDust.error("storeBattle"); }
}
public void storeGame(int you, int opponent, int battle, int mode)
{
try {
db.execSQL(String.format(INSERT_GAME, you, opponent, battle, mode));
} catch (SQLiteGdxException e) { RustAndDust.error("storeGame"); }
}
public int getGameId(int you, int opponent, int battle, int mode)
{
int ret = NO_RECORDS;
try {
DatabaseCursor cursor = db.rawQuery(String.format(GET_GAME_ID, you, opponent, battle, mode));
if (cursor.getCount() > 0) {
cursor.next();
ret = cursor.getInt(0);
}
} catch (SQLiteGdxException e) { RustAndDust.error("getGameId"); }
return ret;
}
public int storeGameGetId(int you, int opponent, int battle, int mode)
{
storeGame(you, opponent, battle, mode);
return getGameId(you, opponent, battle, mode);
}
public boolean storeTurn(int game, int player, String payload)
{
try {
String hash = getDigest(payload);
if (hash == null) return false;
db.execSQL(String.format(INSERT_TURN, game, player, hash, payload, game));
} catch (SQLiteGdxException e) {
RustAndDust.error("storeTurn");
return false;
}
return true;
}
public boolean storeState(int game, String payload)
{
try {
String hash = getDigest(payload);
if (hash == null) return false;
db.execSQL(String.format(INSERT_STATE, game, hash, payload, game));
} catch (SQLiteGdxException e) {
RustAndDust.error("storeState");
return false;
}
return true;
}
public String loadState(int game)
{
String ret = null;
try {
DatabaseCursor cursor = db.rawQuery(String.format(GET_STATE, game));
if (cursor.getCount() > 0) {
cursor.next();
ret = cursor.getString(0);
}
} catch (SQLiteGdxException e) { RustAndDust.error("loadState"); }
return ret;
}
}
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