package com.example.alex.lab5_database;

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

import java.util.ArrayList;
import java.util.List;

public class db extends SQLiteOpenHelper {
//    private static final String DATABASE_NAME="classmates";
//   private static final String TABLE_CLASS="Classmates";
//
//    public void onCreate(SQLiteDatabase db){
//        db.execSQL("CREATE TABLE " + TABLE_CLASS + "(_id INTEGER PRIMARY KEY
//                AUTOINCREMENT ," + COL NAME + " TEXT ,"+ COL PHONE + " TEXT);");
//    }
//    @Override
//    public void onUpgrade(SQLiteDatabase db, intoldVersion, intnewVersion){
//        db.execSQL("DROP TABLE IF EXISTS"+ TABLE_CLASS);
//        onCreate(db);
//    }
//    Cursor query(String table, String[] columns, String selection,
//                 String[] selectionArgs, String groupBy, String having, String sortOrder);

        public static final int DATABASE_VERSION = 1;
        public static final String DATABASE_NAME = "classmates.db";
        public static final String TABLE_CLASS = "Classmates";

        public static final String COLUMN_ID = "_id";
        public static final String COLUMN_NAME = "full name";
        public static final String COLUMN_TIME = "time registered";

//        public db(Context context) {
//            super(context, DATABASE_NAME, null, DATABASE_VERSION);
//        }

        public db(Context context) {
            super(context, TABLE_CLASS, null, 1);
        }

        // Database creation sql statement

        @Override
        public void onCreate(SQLiteDatabase database) {
            String DATABASE_CREATE = "create table "
                    + TABLE_CLASS + " (" + COLUMN_ID
                    + " integer primary key autoincrement, " + COLUMN_NAME
                    + " text, "+ COLUMN_TIME + " long)";
            database.execSQL(DATABASE_CREATE);
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
//            Log.w(com.example.alex.lab5_database.db.class.getName(),
//                    "Upgrading database from version " + oldVersion + " to "
//                            + newVersion + ", which will destroy all old data");
//            db.execSQL("DROP TABLE IF EXISTS " + TABLE_CLASS);
//            onCreate(db);

            db.execSQL("DROP IF TABLE EXISTS " + TABLE_CLASS);
            onCreate(db);
        }

    // Adding a new classmate
    boolean addClassmate(String name, long time) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(COLUMN_NAME, name); // Classmate Name
        values.put(COLUMN_TIME,time);

        // Inserting Row
        long result = db.insert(TABLE_CLASS, null, values);

//        db.close();

        if (result == -1) {
            return false;
        } else {
            return true;
        }

    }

    // Getting single classmate
    Classmate getClassmate(int id) {
        SQLiteDatabase db = this.getReadableDatabase();

        Cursor cursor = db.query(TABLE_CLASS, new String[] { COLUMN_ID,
                        COLUMN_NAME, COLUMN_TIME }, COLUMN_ID + "=?",
                new String[] { String.valueOf(id) }, null, null, null, null);
        if (cursor != null)
            cursor.moveToFirst();

        Classmate classmate = new Classmate(Integer.parseInt(cursor.getString(0)),
                cursor.getString(1), new java.sql.Time(cursor.getLong(2)));
        // return classmate
        return classmate;
    }

    // Getting All Classmates
    public List<Classmate> getAllClassmates() {
        List<Classmate> classmateList = new ArrayList<Classmate>();
        // Select All Query
        String selectQuery = "SELECT  * FROM " + TABLE_CLASS;

        SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = db.rawQuery(selectQuery, null);

        // looping through all rows and adding to list
        if (cursor.moveToFirst()) {
            do {
                Classmate classmate = new Classmate();
                classmate.setId(Integer.parseInt(cursor.getString(0)));
                classmate.setName(cursor.getString(1));
                classmate.setTime(new java.sql.Time(cursor.getLong(2)));
                // Adding contact to list
                classmateList.add(classmate);
            } while (cursor.moveToNext());
        }

        // return contact list
        return classmateList;
    }

    // Updating single classmate
    public int updateClassmate(Classmate classmate) {
        SQLiteDatabase db = this.getWritableDatabase();
        ContentValues values = new ContentValues();
        values.put(COLUMN_NAME, classmate.getName());

        // updating row
        return db.update(TABLE_CLASS, values, COLUMN_ID + " = ?",
                new String[] { String.valueOf(classmate.getId())});
    }

    // Deleting single contact
    public void deleteContact(Classmate classmate) {
        SQLiteDatabase db = this.getWritableDatabase();
        db.delete(TABLE_CLASS, COLUMN_ID + " = ?",
                new String[] { String.valueOf(classmate.getId()) });
        db.close();
    }





}