#define DEVELOPING
#define DO_THREADED
#define DO_UNTHREADED

using System;
using System.Collections.Generic;
using System.IO;
using System.Diagnostics;
using System.Text;

namespace Boggle
{
    public class Boggle
    {
        static void PrintWords(HashSet<WordOnBoard> words)
        {
            int score = 0;
            foreach (WordOnBoard word in words)
            {
                Console.Write("{0} [{1}], ", word.Word, word.Score);
                score += word.Score;
            }
            Console.WriteLine("\n\nTotal score for this board: {0}", score);
        }
        static void Main(string[] args)
        {
            Stopwatch st = new Stopwatch();
            BoggleList bl = new BoggleList();
            Console.WriteLine("Current directory: {0}", Directory.GetCurrentDirectory());
#if !DEVELOPING
            string input;
            bool isError = false;
#endif
            int boardSideLength = 10;
            int minWordLength = 4;

            char wordListInput = 'Z';
            SupportedLists listToUseForLookup;

#if !DEVELOPING
            do
            {
                isError = false;
                Console.WriteLine("Please enter the word list that you wish to use [Z for Zingarelli, T for TWS or standard scrabble list]: ");
                input = Console.ReadLine();
                if (!char.TryParse(input, out wordListInput))
                {
                    Console.WriteLine("Invalid Input. Couldn't parse character");
                    isError = true;
                }
                wordListInput = char.ToUpper(wordListInput);
                if (wordListInput != 'T' && wordListInput != 'Z')
                {
                    Console.WriteLine("Please enter only T or Z.");
                    isError = true;
                }
            } while (isError);
#endif
            switch (wordListInput)
            {
                case 'T':
                    listToUseForLookup = SupportedLists.TWS;
                    break;

                case 'Z':
                    listToUseForLookup = SupportedLists.ZINGARELLI;
                    break;
                default:
                    throw new Exception("Unexpected!!");
            }

#if !DEVELOPING
            do
            {
                isError = false;
                Console.WriteLine("Please enter number of tiles that make up one side of the board: ");
                input = Console.ReadLine();
                if (!int.TryParse(input, out boardSideLength))
                {
                    Console.WriteLine("Invalid Input.");
                    isError = true;
                }
            } while (isError);

            do
            {
                isError = false;
                Console.WriteLine("Please enter number of ALPHABETS that should be there in shortest word: ");
                input = Console.ReadLine();
                if (!int.TryParse(input, out minWordLength))
                {
                    Console.WriteLine("Invalid Input.");
                    isError = true;
                }
            } while (isError);
#endif
            Console.WriteLine("Board Side Length (in Tiles): {0}, Minimum word length (in alphabets): {1}, Word list: {2}", boardSideLength, minWordLength, listToUseForLookup);            
            st.Start();
            bl.LoadList(listToUseForLookup, boardSideLength, minWordLength, Directory.GetCurrentDirectory());
            st.Stop();
            Console.WriteLine("Loaded list (and serialized) in {0} ms.", st.ElapsedMilliseconds);

            //Generate a default random string for each run.
            string boardString = string.Empty;
            StringBuilder randomDefaultString = new StringBuilder(boardSideLength * boardSideLength);
            Random rand = new Random(DateTime.Now.Millisecond);
            for (int i = 0; i < boardSideLength * boardSideLength; i++)
            {
                randomDefaultString.Append((char)rand.Next('A', 'Z'));
            }
            boardString = randomDefaultString.ToString();

#if !DEVELOPING
            do
            {
                isError = false;
                Console.WriteLine("Please enter the characters on board in row first fashion ({0} expected characters): ", boardSideLength*boardSideLength);
                boardString = Console.ReadLine();
                if (boardString.Length != boardSideLength*boardSideLength)
                {
                    Console.WriteLine("Invalid Input. Q will be translated to QU internally. Please enter only Q if you want to enter the QU tile.");
                    isError = true;
                }
            } while (isError);
#endif
            boardString = boardString.ToUpper();

            BoggleBoard board = new BoggleBoard(boardSideLength, boardString);
            board.Print();
            BoggleSolver solver = new BoggleSolver(board, bl, minWordLength);
            st.Reset();
#if DO_UNTHREADED
            st.Start();
            HashSet<WordOnBoard> wordsUnThreaded = solver.GetWordsOnBoard(false);
            st.Stop();
            PrintWords(wordsUnThreaded);

            Console.WriteLine("Got solution in {0} ms. Number of words (UNTHREADED): {1}\n\n", st.ElapsedMilliseconds, wordsUnThreaded.Count);
#endif
            st.Reset();
#if DO_THREADED
            st.Start();
            HashSet<WordOnBoard> wordsThreaded = solver.GetWordsOnBoard(true);
            st.Stop();
            PrintWords(wordsThreaded);
            Console.WriteLine("\nGot solution in {0} ms. Number of words (THREADED): {1}.", st.ElapsedMilliseconds, wordsThreaded.Count);
#endif
#if DO_THREADED && DO_UNTHREADED
            Console.WriteLine("Time for sanity checks... comparing solutions from threaded and non-threaded mode.");
            if (wordsThreaded.Count == wordsUnThreaded.Count)
            {
                Console.WriteLine("\nALL GOOD!");
            }
            if (wordsUnThreaded.Count > wordsThreaded.Count)
            {
                wordsUnThreaded.ExceptWith(wordsThreaded);
                Console.WriteLine("Words in unthreaded collection that are not in threaded collection:");
                PrintWords(wordsUnThreaded);
            }
            if (wordsThreaded.Count > wordsUnThreaded.Count)
            {
                wordsThreaded.ExceptWith(wordsUnThreaded);
                Console.WriteLine("Words in threaded collection that are not in unthreaded collection:");
                PrintWords(wordsThreaded);
            }
#endif
            Console.WriteLine("\nPress any key to exit.");
            Console.ReadKey();
        }
    }
}