package com.example.dep.unipiinformaticsapp;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class DatabaseClass extends SQLiteOpenHelper {

    public static final String DATABASE_NAME = "unipi.db";
    public static final int DATABASE_VERSION = 1;
    public static final String TABLE_NAME = "credentials";
    public static final String COL_1 = "username";
    public static final String COL_2 = "password";

    public SQLiteDatabase db;
    private final Context context;

    public DatabaseClass(Context context) {
        // context: use to open or create the  database
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
        this.context = context;
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        //db = this.getWritableDatabase();
        db.execSQL("CREATE TABLE " + TABLE_NAME +" (USERNAME TEXT PRIMARY KEY,PASSWORD TEXT)");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        Log.w("DB", "Upgrading from version " + oldVersion + " to " + newVersion);
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
        onCreate(db);
    }

    public DatabaseClass open() throws SQLException {
        Log.w("DB", "Database opened");
        db = this.getWritableDatabase();
        return this;
    }

    public void close() {
        Log.w("DB", "Database closed");
        db.close();
    }

    public SQLiteDatabase getDatabaseInstance() {
        return db;
    }

    public void insertEntry(String userName, String password) {
        ContentValues newValues = new ContentValues();
        newValues.put("USERNAME", userName);
        newValues.put("PASSWORD", password);
        Log.w("DB", newValues + " inserted");
        db.insert(TABLE_NAME, null, newValues);
    }

    public int deleteEntry(String username) {
        Log.w("DB", username + " deleted");
        return db.delete(TABLE_NAME, "USERNAME=?", new String[] {username});
    }

    public String getSinlgeEntry(String username) {
        Cursor cursor = db.query(TABLE_NAME, null, " USERNAME=?", new String[] {username}, null, null, null);
        if (cursor.getCount() < 1) {
            cursor.close();
            return "NOT EXIST";
        }
        cursor.moveToFirst();
        String password = cursor.getString(cursor.getColumnIndex("PASSWORD"));
        cursor.close();
        return password;
    }

    public void updateEntry(String username, String password) {
        Log.w("DB", "Entry Updated");
        ContentValues updatedValues = new ContentValues();
        updatedValues.put("USERNAME", username);
        updatedValues.put("PASSWORD", password);
        db.update(TABLE_NAME, updatedValues, "USERNAME=?", new String[] { username });
    }

}