package com.example.databaseapp;

import android.content.ContentValues;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

import androidx.annotation.Nullable;

public class Database extends SQLiteOpenHelper {



    public static final String DATABASE_NAME = "student.db";
    public static final String TABLE_NAME = "student_table";
    public static final String COL_1 = "STUDENT_ID";
    public static final String COL_2 = "NAME";
    public static final String COL_3 = "SURNAME";
    public static final String COL_4 = "MARKS";

    public Database(@Nullable Context context) {
        super(context, DATABASE_NAME, null, 1);

    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("CREATE TABLE " + TABLE_NAME + " ( " + COL_1 + "INTEGER PRIMARY KEY AUTOINCREMENT, " + COL_2 + " TEXT, " + COL_3 + " TEXT, " + COL_4 + "INTEGER )");

    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
        onCreate(db);
    }

    public void Update (String name, String surname, int marks) {

        SQLiteDatabase db = this.getWritableDatabase();

    /* db.execSQL("INSERT INTO " + TABLE_NAME + " ( " + COL_1 + ", " + COL_2 + ", " + COL_3 + ", " + COL_4 + ")" +
                    "VALUES ( " + name + ", " + surname + ", " + marks + ")");*/


        ContentValues contentValues = new ContentValues();
        contentValues.put(COL_2, name);
        contentValues.put(COL_3, surname);
        contentValues.put(COL_4, marks);
        db.insert(TABLE_NAME, null, contentValues);
        db.close();
    }
    public void Delete (int ID) {

        SQLiteDatabase db = this.getWritableDatabase();
        db.execSQL("DELETE FROM " + TABLE_NAME + " WHERE ID = " + ID);
        db.close();
    }


}