package simpledb.buffer;

import simpledb.server.SimpleDB;
import simpledb.file.*;
import java.util.*;

public class Hw3BufferTestSols {
	private static Map<Block,Buffer> buffs = new HashMap<Block, Buffer>();
	private static BufferMgr bm;

    public static void main(String args[]) throws Exception {
    	SimpleDB.init(args[0]);
    	bm = SimpleDB.bufferMgr();
		System.out.println(bm);

		pinBuffer(0); pinBuffer(1); pinBuffer(2); pinBuffer(3);
		System.out.println(bm);
		unpinBuffer(0); unpinBuffer(2);
		System.out.println(bm);
		pinBuffer(4); pinBuffer(5); unpinBuffer(5); unpinBuffer(4);
		System.out.println(bm);
		pinBuffer(6); pinBuffer(7); pinBuffer(8); pinBuffer(9);
		System.out.println(bm);
		unpinBuffer(1); unpinBuffer(3);
		System.out.println(bm);
		pinBuffer(10); pinBuffer(11); pinBuffer(12);
		System.out.println(bm);
    }

    private static void pinBuffer(int i) {
		Block blk = new Block("test", i);
		Buffer buff = bm.pin(blk);
		buffs.put(blk, buff);
	}

	private static void unpinBuffer(int i) {
		Block blk = new Block("test", i);
		Buffer buff = buffs.get(blk);
		bm.unpin(buff);
	}
}