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/*

 * CS 3114 Project 4

 * Author: Kevin Lee

 * Compiler: Eclipse 3.7.0

 * Operating System: Windows 7 x64

 * Date Completed: 12/4/2011

 * 

 * The following program is an combination of the previous three

 * projects. This program implements the GIS b-tree and

 * quad-tree, but instead of keeping the PRQuad-Tree in memory,

 * the PRQuad-Tree interfaces with a memory manager to store and

 * retrieve internal and leaf nodes, as well as city names. The

 * memory manager interfaces to a file ("p4bin.dat") using a 

 * buffer pool. The buffer pool is implemented using a least 

 * recently used block list. 

 * 

 * Note that while the PRQuad-Tree is optimized for speed, the

 * conversion of CityRecords to handles for the b-tree severely

 * slows down the program (see test _seq-16384-IR). If the b-tree

 * is kept completely in memory, the program runs >30x faster.

 * 

 * On my honor:

 *

 * - I have not used source code obtained from another student,

 * or any other unauthorized source, either modified or

 * unmodified.

 *

 * - All source code and documentation used in my program is

 * either my original work, or was derived by me from the

 * source code published in the textbook for this course.

 *

 * - I have not discussed coding details about this project with

 * anyone other than my partner (in the case of a joint

 * submission), instructor, ACM/UPE tutors or the TAs assigned

 * to this course. I understand that I may discuss the concepts

 * of this program with other students, and that another student

 * may help me debug my program so long as neither of us writes

 * anything during the discussion or modifies any computer file

 * during the discussion. I have violated neither the spirit nor

 * letter of this restriction.

 */

import java.io.BufferedReader;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.IOException;

public class Bindisk {

	public static void main(String[] args) {

		// 3 arguments must be supplied to the program

		if (args.length != 3) {

			System.out.println("3 Arguments must be supplied!");

			return;

		}

		// Parses passed arguments into member variables

		String dataFile = args[0];

		int buffSize = Integer.parseInt(args[1]);

		int blockSize = Integer.parseInt(args[2]);

		if (buffSize < 1 || buffSize > 20) {

			System.out.println("Number of buffers must be between 1 and 20");

			return;

		}

		LRUBuffer buffer = new LRUBuffer("p4bin.dat", "p4bin-stat.dat", buffSize, blockSize);

		MemManager memManager = new MemManager(buffer, blockSize);

		// Check to make sure the command file exists

		File cmdFile = new File(dataFile);

		if (!cmdFile.exists()) {

			System.out.printf("Command file not found");

			return;

		}

		CmdParser GISParser = new CmdParser(memManager);

		long time1 = System.currentTimeMillis();

		// Parse each command with the memory client

		try {

			BufferedReader reader = new BufferedReader(new FileReader(cmdFile));

			String cin;

			while ((cin = reader.readLine()) != null) {

				cin = cin.trim();

				if (cin.length() != 0) {

					// Send string to command parser

					GISParser.Parse(cin);

				}

			}

		} catch (FileNotFoundException e) {

			System.out.printf("Command file not found");

			return;

		} catch (IOException e) {

			System.out.printf("Unable to read input file");

			return;

		}

		buffer.flushBuffer();

		long time2 = System.currentTimeMillis();

		buffer.writeStats(time2-time1);

	}

}