using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SQLite;
using System.Data;
using System.IO;
using System.Collections;

namespace IW4MAdmin
{
    class Database
    {
        public Database(String FN)
        {
            FileName = FN;
            DBCon = String.Format("Data Source={0}", FN);
            Con = new SQLiteConnection(DBCon);
            Init();
        }

        private void Init()
        {
            if(!File.Exists(FileName))
            {
                String query = "CREATE TABLE [CLIENTS] ( [Name] TEXT  NULL, [npID] TEXT  NULL, [Number] INTEGER PRIMARY KEY AUTOINCREMENT, [Level] INT DEFAULT 0 NULL, [LastOffense] TEXT NULL, [Connections] INT DEFAULT 1 NULL);";
                ExecuteNonQuery(query);
                query = "CREATE TABLE [BANS] ( [Reason] TEXT NULL, [npID] TEXT NULL, [bannedByID] Text NULL)";
                ExecuteNonQuery(query);
            }
        }

        public Player getPlayer(String ID, int cNum)
        {
            String Query = String.Format("SELECT * FROM CLIENTS WHERE npID = '{0}' LIMIT 1", ID);
            DataTable Result = GetDataTable(Query);

            if (Result != null && Result.Rows.Count > 0)
            {
                DataRow ResponseRow = Result.Rows[0];
                return new Player(ResponseRow["Name"].ToString(), ResponseRow["npID"].ToString(), cNum, (Player.Permission)(ResponseRow["Level"]), Convert.ToInt32(ResponseRow["Number"]), ResponseRow["LastOffense"].ToString(), (int)ResponseRow["Connections"]);
            }

            else
                return null;
        }

        public List<Player> findPlayers(String name)
        {
            String Query = String.Format("SELECT * FROM CLIENTS WHERE Name LIKE '%{0}%' LIMIT 10", name);
            DataTable Result = GetDataTable(Query);

            List<Player> Players = new List<Player>();

            if (Result != null && Result.Rows.Count > 0)
            {
                foreach (DataRow p in Result.Rows)
                {
                    Players.Add(new Player(p["Name"].ToString(), p["npID"].ToString(), -1, (Player.Permission)(p["Level"]), Convert.ToInt32(p["Number"]), p["LastOffense"].ToString(), ((int)p["Connections"])));
                }
                return Players;
            }

            else
                return null;
        }

        public Player findPlayers(int dbIndex)
        {
            String Query = String.Format("SELECT * FROM CLIENTS WHERE Number = '{0}' LIMIT 1", dbIndex);
            DataTable Result = GetDataTable(Query);

            if (Result != null && Result.Rows.Count > 0)
            { 
               foreach (DataRow p in Result.Rows)
                    return new Player(p["Name"].ToString(), p["npID"].ToString(), -1, (Player.Permission)(p["Level"]), Convert.ToInt32(p["Number"]), p["LastOffense"].ToString(), ((int)p["Connections"]));
            }
     
            return null;
        }

        public Player getOwner()
        {
            String Query = String.Format("SELECT * FROM CLIENTS WHERE Level = '{0}'", 4);
            DataTable Result = GetDataTable(Query);

            if (Result != null && Result.Rows.Count > 0)
            {
                DataRow ResponseRow = Result.Rows[0];
                return new Player(ResponseRow["Name"].ToString(), ResponseRow["npID"].ToString(), -1, (Player.Permission)(ResponseRow["Level"]), Convert.ToInt32(ResponseRow["Number"]), null, 0);
            }

            else
                return null;
        }

        public List<Ban> getBans()
        {
            List<Ban> Bans = new List<Ban>();
            DataTable Result = GetDataTable("SELECT * FROM BANS");

            foreach (DataRow Row in Result.Rows)
                Bans.Add(new Ban(Row["Reason"].ToString(), Row["npID"].ToString(), Row["bannedByID"].ToString()));

            return Bans;
        }

        public void removeBan(String GUID)
        {
            String Query = String.Format("DELETE FROM BANS WHERE npID = '{0}'", GUID);
            ExecuteNonQuery(Query);
        }

        public void addPlayer(Player P)
        {
            Dictionary<String, object> newPlayer = new Dictionary<String, object>();

            newPlayer.Add("Name", Utilities.removeNastyChars(P.getName()));
            newPlayer.Add("npID", P.getID());
            newPlayer.Add("Level", (int)P.getLevel());
           // newPlayer.Add("Number", P.getClientNum().ToString());
            newPlayer.Add("LastOffense", "");
            newPlayer.Add("Connections", 1);

            Insert("CLIENTS", newPlayer);
        }

        public void updatePlayer(Player P)
        {
            Dictionary<String, object> updatedPlayer = new Dictionary<String, object>();

            updatedPlayer.Add("Name", P.getName());
            updatedPlayer.Add("npID", P.getID());
            updatedPlayer.Add("Level", (int)P.getLevel());
           // updatedPlayer.Add("Number", P.getClientNum().ToString());
            updatedPlayer.Add("LastOffense", P.getLastO());
            updatedPlayer.Add("Connections", P.getConnections());

            Update("CLIENTS", updatedPlayer, String.Format("npID = '{0}'", P.getID()));
        }

        public void addBan(Ban B)
        {
            Dictionary<String, object> newBan = new Dictionary<String, object>();

            newBan.Add("Reason", B.getReason());
            newBan.Add("npID", B.getID());
            newBan.Add("bannedByID", B.getBanner());
   
            Insert("BANS", newBan);
        }

        //HELPERS

        public bool Insert(String tableName, Dictionary<String, object> data)
        {
            String columns = "";
            String values = "";
            Boolean returnCode = true;
            foreach (KeyValuePair<String, object> val in data)
            {
                columns += String.Format(" {0},", val.Key);
                values += String.Format(" '{0}',", val.Value);
            }
            columns = columns.Substring(0, columns.Length - 1);
            values = values.Substring(0, values.Length - 1);
            try
            {
                this.ExecuteNonQuery(String.Format("insert into {0}({1}) values({2});", tableName, columns, values));
            }
            catch (Exception fail)
            {
                Console.WriteLine(fail.Message);
                returnCode = false;
            }
            return returnCode;
        }

        public bool Update(String tableName, Dictionary<String, object> data, String where)
        {
            String vals = "";
            Boolean returnCode = true;
            if (data.Count >= 1)
            {
                foreach (KeyValuePair<String, object> val in data)
                {
                    vals += String.Format(" {0} = '{1}',", val.Key, val.Value);
                }
                vals = vals.Substring(0, vals.Length - 1);
            }
            try
            {
                this.ExecuteNonQuery(String.Format("update {0} set {1} where {2};", tableName, vals, where));
            }
            catch (Exception fail)
            {
                Console.WriteLine(fail.Message);
                returnCode = false;
            }
            return returnCode;
        }

        public DataRow getDataRow(String Q)
        {
            DataRow Result = GetDataTable(Q).Rows[0];
            return Result;
        }

        private int ExecuteNonQuery(String Request)
        {
            Con.Open();
            SQLiteCommand CMD = new SQLiteCommand(Con);
            CMD.CommandText = Request;
            int rowsUpdated = CMD.ExecuteNonQuery();
            Con.Close();
            return rowsUpdated;
        }

        public DataTable GetDataTable(String sql)
        {
            DataTable dt = new DataTable();
            try
            {
                Con.Open();
                SQLiteCommand mycommand = new SQLiteCommand(Con);
                mycommand.CommandText = sql;
                SQLiteDataReader reader = mycommand.ExecuteReader();
                dt.Load(reader);
                reader.Close();
                Con.Close();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                throw new Exception(e.Message);
            }
            return dt;
        }
        //END

        private String FileName;
        private String DBCon;
        private SQLiteConnection Con;
    }
}