/**
 * Jobs Plugin for Bukkit
 * Copyright (C) 2011 Zak Ford <zak.j.ford@gmail.com>
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * 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/>.
 */

package com.gamingmesh.jobs.dao;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import org.bukkit.Bukkit;
import org.bukkit.OfflinePlayer;

import com.gamingmesh.jobs.Jobs;
import com.gamingmesh.jobs.stuff.ChatColor;
import com.gamingmesh.jobs.stuff.OfflinePlayerList;
import com.gamingmesh.jobs.stuff.UUIDUtil;

public class JobsDAOMySQL extends JobsDAO {
    private String database;

    private JobsDAOMySQL(String hostname, String database, String username, String password, String prefix) {
	super("com.mysql.jdbc.Driver", "jdbc:mysql://" + hostname + "/" + database, username, password, prefix);
	this.database = database;
    }

    public static JobsDAOMySQL initialize(String hostname, String database, String username, String password, String prefix) {
	JobsDAOMySQL dao = new JobsDAOMySQL(hostname, database, username, password, prefix);
	try {
	    dao.setUp();
	} catch (SQLException e) {
	    e.printStackTrace();
	}
	return dao;
    }

    @Override
    protected synchronized void setupConfig() throws SQLException {
	JobsConnection conn = getConnection();
	if (conn == null) {
	    Jobs.getPluginLogger().severe("Could not run database updates!  Could not connect to MySQL!");
	    return;
	}
	PreparedStatement prest = null;
	int rows = 0;
	try {
	    // Check for config table
	    prest = conn.prepareStatement("SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = ? AND table_name = ?;");
	    prest.setString(1, database);
	    prest.setString(2, getPrefix() + "config");
	    ResultSet res = prest.executeQuery();
	    if (res.next()) {
		rows = res.getInt(1);
	    }
	} finally {
	    if (prest != null) {
		try {
		    prest.close();
		} catch (SQLException e) {
		}
	    }
	}

	if (rows == 0) {
	    PreparedStatement insert = null;
	    try {
		executeSQL("CREATE TABLE `" + getPrefix() + "config` (`key` varchar(50) NOT NULL PRIMARY KEY, `value` varchar(100) NOT NULL);");

		insert = conn.prepareStatement("INSERT INTO `" + getPrefix() + "config` (`key`, `value`) VALUES (?, ?);");
		insert.setString(1, "version");
		insert.setString(2, "1");
		insert.execute();
	    } finally {
		if (insert != null) {
		    try {
			insert.close();
		    } catch (SQLException e) {
		    }
		}
	    }
	}
    }

    @Override
    protected synchronized void checkUpdate1() throws SQLException {
	JobsConnection conn = getConnection();
	if (conn == null) {
	    Jobs.getPluginLogger().severe("Could not run database updates!  Could not connect to MySQL!");
	    return;
	}
	PreparedStatement prest = null;
	int rows = 0;
	try {
	    // Check for jobs table
	    prest = conn.prepareStatement("SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = ? AND table_name = ?;");
	    prest.setString(1, database);
	    prest.setString(2, getPrefix() + "jobs");
	    ResultSet res = prest.executeQuery();
	    if (res.next()) {
		rows = res.getInt(1);
	    }
	} finally {
	    if (prest != null) {
		try {
		    prest.close();
		} catch (SQLException e) {
		}
	    }
	}

	PreparedStatement pst1 = null;
	PreparedStatement pst2 = null;
	try {
	    if (rows == 0) {
		executeSQL("CREATE TABLE `" + getPrefix()
		    + "jobs` (`id` int NOT NULL AUTO_INCREMENT PRIMARY KEY, `player_uuid` binary(16) NOT NULL, `job` varchar(20), `experience` int, `level` int);");
	    } else {
		Jobs.getPluginLogger().info("Converting existing usernames to Mojang UUIDs.  This could take a long time!");

		try {
		    // Check for jobs table id column
		    // This is extra check to be sure there is no column by this name already
		    int idrows = 0;
		    prest = conn.prepareStatement("SELECT COUNT(*) FROM information_schema.columns WHERE table_schema = ? AND table_name = ? AND column_name = ?;");
		    prest.setString(1, database);
		    prest.setString(2, getPrefix() + "jobs");
		    prest.setString(3, "id");
		    ResultSet res = prest.executeQuery();
		    if (res.next()) {
			idrows = res.getInt(1);
		    }
		    if (idrows == 0)
			executeSQL("ALTER TABLE `" + getPrefix() + "jobs` ADD COLUMN `id` int NOT NULL AUTO_INCREMENT PRIMARY KEY FIRST;");
		} finally {

		}

		try {
		    // Check for jobs table id column
		    // This is extra check to be sure there is no column by this name already
		    int uuidrows = 0;
		    prest = conn.prepareStatement("SELECT COUNT(*) FROM information_schema.columns WHERE table_schema = ? AND table_name = ? AND column_name = ?;");
		    prest.setString(1, database);
		    prest.setString(2, getPrefix() + "jobs");
		    prest.setString(3, "player_uuid");
		    ResultSet res = prest.executeQuery();
		    if (res.next()) {
			uuidrows = res.getInt(1);
		    }
		    if (uuidrows == 0)
			executeSQL("ALTER TABLE `" + getPrefix() + "jobs` ADD COLUMN `player_uuid` binary(16) DEFAULT NULL AFTER `id`;");
		} finally {

		}

		pst1 = conn.prepareStatement("SELECT DISTINCT `username` FROM `" + getPrefix() + "jobs` WHERE `player_uuid` IS NULL;");
		ResultSet rs = pst1.executeQuery();
		ArrayList<String> usernames = new ArrayList<String>();
		while (rs.next()) {
		    usernames.add(rs.getString(1));
		}

		pst2 = conn.prepareStatement("UPDATE `" + getPrefix() + "jobs` SET `player_uuid` = ? WHERE `username` = ?;");

		int i = 0;
		int y = 0;
		for (String names : usernames) {
		    i++;
		    y++;
		    if (i >= 10) {
			Bukkit.getServer().getConsoleSender().sendMessage(ChatColor.DARK_GREEN + "" + y + " of " + usernames.size());
			i = 0;
		    }
		    
		    OfflinePlayer offPlayer = OfflinePlayerList.getPlayer(names);
		    if (offPlayer == null)
			continue;
		    
		    pst2.setBytes(1, UUIDUtil.toBytes(offPlayer.getUniqueId()));
		    pst2.setString(2, names);
		    pst2.execute();
		}

		Jobs.getPluginLogger().info("Mojang UUID conversion complete!");
	    }
	} finally {
	    if (pst1 != null) {
		try {
		    pst1.close();
		} catch (SQLException e) {
		}
	    }
	    if (pst2 != null) {
		try {
		    pst2.close();
		} catch (SQLException e) {
		}
	    }
	}

	checkUpdate2();
    }

    @Override
    protected synchronized void checkUpdate2() throws SQLException {
	JobsConnection conn = getConnection();
	if (conn == null) {
	    Jobs.getPluginLogger().severe("Could not run database updates!  Could not connect to MySQL!");
	    return;
	}
	PreparedStatement prest = null;
	int rows = 0;
	try {
	    // Check for jobs table
	    prest = conn.prepareStatement("SELECT COUNT(*) FROM information_schema.columns WHERE table_schema = ? AND table_name = ? AND column_name = ?;");
	    prest.setString(1, database);
	    prest.setString(2, getPrefix() + "jobs");
	    prest.setString(3, "username");
	    ResultSet res = prest.executeQuery();
	    if (res.next()) {
		rows = res.getInt(1);
	    }
	} finally {
	    if (prest != null) {
		try {
		    prest.close();
		} catch (SQLException e) {
		}
	    }
	}

	try {
	    if (rows == 0)
		executeSQL("ALTER TABLE `" + getPrefix() + "jobs` ADD COLUMN `username` varchar(20);");
	} finally {
	}
	checkUpdate4();
    }

    @Override
    protected synchronized void checkUpdate4() throws SQLException {
	JobsConnection conn = getConnection();
	if (conn == null) {
	    Jobs.getPluginLogger().severe("Could not run database updates!  Could not connect to MySQL!");
	    return;
	}
	PreparedStatement prest = null;
	int rows = 0;
	try {
	    // Check for jobs table
	    prest = conn.prepareStatement("SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = ? AND table_name = ?;");
	    prest.setString(1, database);
	    prest.setString(2, getPrefix() + "archive");
	    ResultSet res = prest.executeQuery();
	    if (res.next()) {
		rows = res.getInt(1);
	    }
	} finally {
	    if (prest != null) {
		try {
		    prest.close();
		} catch (SQLException e) {
		}
	    }
	}

	try {
	    if (rows == 0)
		executeSQL("CREATE TABLE `" + getPrefix()
		    + "archive` (`id` int NOT NULL AUTO_INCREMENT PRIMARY KEY, `player_uuid` binary(16) NOT NULL, `username` varchar(20), `job` varchar(20), `experience` int, `level` int);");
	} finally {
	}
    }

    @Override
    protected synchronized void checkUpdate5() throws SQLException {
	JobsConnection conn = getConnection();
	if (conn == null) {
	    Jobs.getPluginLogger().severe("Could not run database updates!  Could not connect to MySQL!");
	    return;
	}
	PreparedStatement prest = null;
	int rows = 0;
	try {
	    // Check for jobs table
	    prest = conn.prepareStatement("SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = ? AND table_name = ?;");
	    prest.setString(1, database);
	    prest.setString(2, getPrefix() + "log");
	    ResultSet res = prest.executeQuery();
	    if (res.next()) {
		rows = res.getInt(1);
	    }
	} finally {
	    if (prest != null) {
		try {
		    prest.close();
		} catch (SQLException e) {
		}
	    }
	}

	try {
	    if (rows == 0)
		executeSQL("CREATE TABLE `" + getPrefix()
		    + "log` (`id` int NOT NULL AUTO_INCREMENT PRIMARY KEY, `player_uuid` binary(16) NOT NULL, `username` varchar(20), `time` bigint, `action` varchar(20), `itemname` varchar(20), `count` int, `money` double, `exp` double);");
	} finally {
	}
    }
}