/* Lesley Hogan
 * July 30th 2003
 * Money.java
 * Cash Record Program for Exeter
 */

package net.bunnie.dos;

import java.io.*;
import net.bunnie.*;

public class Money {
	public static void main (String[] args) {

		Echo.e("E X E T E R   C A S H   R E C O R D   2 0 0 3    --for Lesley Hogan\n\n\n");

		// variables for file name, contact email, and error messages
		int lines = 6;
		int linesNums = 5;
		int keys = 5;
		String moneyFileNamePackage = "net\\bunnie\\dos\\";
		String moneyFileName = moneyFileNamePackage + "Money.txt";
		String email = "bunnie[@]bunnie.net";
		String[] errorMessages = new String[9];
		/* errors
		 * [0] file not found
		 * [1] not readable/writable/not 6 lines
		 * [2] first 5 lines not numbers or negative
		 * [3] last line numbers not numbers or negative
		 * [4] last line missing : or |
		 * [5] input :
		 * [6] input keyletter
		 * [7] input int
		 * [8] write to file
		 */
		errorMessages[0] = moneyFileName + " cannot be found. Please restore this file to its proper location.\nIf you have lost or damaged this file, contact " + email + ".\nThis program cannot run without this file. Program will now exit.\n\n";
		errorMessages[1] = ".\nPlease fix this and rerun the program. Program will now exit.\n\n";
		errorMessages[2] = moneyFileName + " has corrupted numerical data. Please fix this and rerun the program.\nContact " + email + " if you need a copy of the original file.\nProgram will now exit.\n\n";
		errorMessages[3] = moneyFileName + " has corrupted numerical data on the last line. Please fix\nthis and rerun the program. Contact " + email + " if you need\na copy of the original file. Program will now exit.\n\n";
		errorMessages[4] = moneyFileName + " has corrupted data (missing colon/pipe) on the last line.\nPlease fix this and rerun the program. Contact " + email + " if\nyou need a copy of the original file. Program will now exit.\n\n";
		errorMessages[5] = "Incorrect format for inputting items. ";
		errorMessages[6] = "Nonexistant keyletter. ";
		errorMessages[7] = "Incorrect format for inputting cost. ";
		errorMessages[8] = moneyFileName + " is corrupted. Please contact " + email + "\nNo data has been saved since the file is unavailable to be written to.\n";

		// check if file exists and is readable and writable
		// also test for corrupted data
		try {
			// check for existentialism and permissions
			File w = new File(moneyFileName);
	        if (w.isFile() == false) {
				throw new FileNotFoundException();
			}
			if (w.canRead() == false) {
				IOException FileNotReadableException = new IOException("does not have readable permissions set");
				throw FileNotReadableException;
			}
			if (w.canWrite() == false) {
				IOException FileNotWriteableException = new IOException("does not have writable permissions set");
				throw FileNotWriteableException;
			}

			// test for corrupted data
			String[] moneyFileTest = ToFileArray.toFileArray(moneyFileName);
			IOException FileCorruptedException = new IOException("has corrupted data");
			// if too many or too few lines
			if (moneyFileTest.length != lines) {
				throw FileCorruptedException;
			}
			// if first 5 lines are not numbers
			for (int i = 0; i < linesNums; i++) {
				moneyFileTest[i] = Regex.replace("\n", "", moneyFileTest[i]);
				// throws NumberFormatException
				moneyFileTest[i] = "" + Integer.parseInt(moneyFileTest[i], 10);
				// throw NumberFormatException if number is negative
				if (Integer.parseInt(moneyFileTest[i], 10) < 0) {
					throw new NumberFormatException();
				}
			}
            // try-catch below for corruption of last line
		}
		// thrown if the file does not exist
		catch (FileNotFoundException fnfe) {
			Echo.e(errorMessages[0]);
			System.exit(0);
		}
		// thrown if file is not readable/writable/has too many/too few lines
		catch (IOException ioe) {
			Echo.e(moneyFileName + " " + ioe.getMessage() + errorMessages[1]);
			System.exit(0);
		}
		// thrown if first 5 lines are not numbers or negative numbers
		catch (NumberFormatException nfef) {
			Echo.e(errorMessages[2]);
			System.exit(0);
		}

		// declare/initialize variables
		double account;
		double wallet;
		double cost;
		int entered;
		int accepted = 0;
		int keyletter = 0;
		int unaccounted = 0;
		String enterItems = "y";
		String blah = "";
		String explodeItem;
		String[] explodedItem;

		// arrays to deal with file
		String[] moneyFile = ToFileArray.toFileArray(moneyFileName);
		String[] newMoneyFile = new String[lines];
		String[] spentStrings = Explode.explode("|", moneyFile[5]);
		String[] spentSmallStrings = new String[2];
		String[] acceptableInput = {"B", "G", "M", "T", "W"};
		int[] moneyInts = new int[linesNums];
		int[] compareInt = new int[2];
		int[] spentMoney = new int[keys];
		/* [0] = in account
		 * [1] = in wallet
		 * [2] = total money
		 * [3] = total spent
		 * [4] = unaccounted
		 * [5] = cost record
		 */

		// replace ending \n's
		for (int i = 0; i < lines; i++) {
            moneyFile[i] = Regex.replace("\n", "", moneyFile[i]);
            newMoneyFile[i] = moneyFile[i];
        }

		// try-catch for data on last line
		try {
			// explode :s and replace \n on end, subtract from unaccounted money
		    for (int i = 0; i < keys; i++) {
		    	spentSmallStrings = Explode.explode(":", spentStrings[i]);
		    	// throws ArrayIndexOutOfBoundsException if no : or too few |s
		    	spentSmallStrings[1] = Regex.replace("\n", "", spentSmallStrings[1]);
		    	// throws NumberFormatException if number after : not a number
		    	spentMoney[i] = Integer.parseInt(spentSmallStrings[1], 10);
		    	// throw NumberFormatException if number is negative
				if (spentMoney[i] < 0) {
					throw new NumberFormatException();
				}
		    	unaccounted -= spentMoney[i];
		    }
		}
		// thrown if number after : not a number or negative number
		catch (NumberFormatException nfent) {
			Echo.e(errorMessages[3]);
			System.exit(0);
		}
		// thrown if no :
		catch (ArrayIndexOutOfBoundsException aioobet) {
			Echo.e(errorMessages[4]);
			System.exit(0);
		}

		KeyboardReader r = new KeyboardReader();

		// get input
		Echo.e("Please input how much money is left in your account: ");
		account = r.readDouble();
		Echo.e("Please input how much money is left in your wallet: ");
		wallet = r.readDouble();

		// round up input
		moneyInts[0] = (int) (Math.ceil(account));
		moneyInts[1] = (int) (Math.ceil(wallet));
		moneyInts[2] = moneyInts[0] + moneyInts[1];

		compareInt[0] = Integer.parseInt(moneyFile[2], 10);
		compareInt[1] = Integer.parseInt(moneyFile[3], 10);

        // if money in wallet+account greater than last time
        // then money must have been added to wallet/account
        // ask for added money
        if (moneyInts[2] > compareInt[0] - compareInt[1]) {
			Echo.e("Please input how much money was added to your account/wallet since last run: ");
			blah = "" + (int) (Math.ceil(r.readDouble()));
			blah = Regex.replace("\n", "", blah);
			entered = Integer.parseInt(blah, 10);
		}
		// otherwise no money was added
		else {
			entered = 0;
		}

		// add added money to total and get how much money was spent
		moneyInts[2] = compareInt[0] + entered;
		moneyInts[3] = moneyInts[2] - (moneyInts[0] + moneyInts[1]);
		unaccounted += moneyInts[3];

		// do loop for entering items
		do {
		    Echo.e("\nPlease input cost of items bought with the following keycodes:\nB:(cost) for Bookstore\nG:(cost) for Grill\nM:(cost) for Mall\nT:(cost) for Trips\nW:(cost) for Walgreens\n\n");
		    explodeItem = r.readLine();
		    explodedItem = Explode.explode(":", explodeItem);

		    // try-catch for input in form k:double
		    // k is keyletter in array
		    // double is how much spent at k
		    try {
				explodedItem[0] = explodedItem[0].toUpperCase();
				// throws ArrayOutOfBoundsException if input has no :
				// and NumberFormatException if double is not a double/int
				explodedItem[1] = "" + (int) (Math.ceil(Integer.parseInt(explodedItem[1], 10)));
		        cost = Integer.parseInt(explodedItem[1], 10);
		        // for loop to find out which keyletter it is
		        accepted = 0;
		        for (int i = 0; i < keys; i++) {
		            if (explodedItem[0].equals(acceptableInput[i])) {
						accepted++;
						keyletter = i;
					}
				}
				// throws IOException if k is not a keyletter
				if (accepted != 1) {
					throw new IOException();
				}
				// add cost to total and total spent, subtract from unaccounted
		        spentMoney[keyletter] += cost;
		        moneyInts[3] += cost;
		        unaccounted -= cost;

        		// for to join last line of file back together
        		for (int i = 0; i < 5; i++) {
					spentStrings[i] = acceptableInput[i] + ":" + spentMoney[i];
		        }
		        newMoneyFile[5] = ToFileArray.join("|", spentStrings);
			}
			// thrown if no :
			catch (ArrayIndexOutOfBoundsException aioobe) {
				Echo.e(errorMessages[5]);
			}
			// thrown if k is not a keyletter
			catch (IOException ioe) {
				Echo.e(errorMessages[6]);
			}
			// thrown if double is not a double/int
			catch (NumberFormatException nfe) {
				Echo.e(errorMessages[7]);
			}

		    // do loop to continue, ask user
		    Echo.e("Enter another item (Y/N): ");
		    enterItems = r.readLine().toLowerCase();
		}
		// only continues if user enters y or Y
		while (enterItems.equals("y"));

		// define strings from ints for new file contents
		newMoneyFile[0] = "" + moneyInts[0];
		newMoneyFile[1] = "" + moneyInts[1];
		newMoneyFile[2] = "" + moneyInts[2];
		newMoneyFile[3] = "" + moneyInts[3];
		newMoneyFile[4] = "" + unaccounted;
		/* newMoneyFile[5] already defined in try-catch above
		 * if try-catch threw an exception,
		 * newMoneyFile[5] is the same as moneyFile[5]
		 * (the original line in the file)
		 * as defined in first for loop after declaring variables
		 */

		// try-catch for file again, just to be safe =)
		try {
			// overwrite old contents with new content array
		    FileWriter wt = new FileWriter(moneyFileName);
    		for (int i = 0; i < lines - 1; i++) {
			    wt.write(newMoneyFile[i] + "\r\n");
		    }
		    // do not put a \n after last line
		    wt.write(newMoneyFile[lines - 1]);
	        wt.close();
		}
		// catch if some weird thing goes wrong (never should)
		catch (IOException ioex) {
			Echo.e(errorMessages[8]);
		}
	}
}