"""
TODO
Make multiple battleships:
You will need to be careful because you need to make sure that you do not place battleships on top of each other on the game board.
You will also want to make sure that you balance the size of the board with the number of ships so the game is still challenging and fun to play.

Make battleships of different sizes:
This is trickier than it sounds. All the parts of the battleship need to be vertically or horizontally touching.
You will need to make sure you do not accidentally place part of a ship off the side of the board.

Make your game a two-player game:
Use functions to allow your game to have more features like rematches, statistics and more!
"""

import os
import time
from random import randint

#cls function
clear = lambda: os.system('cls')

#declares board as an empty list
board = []

ships = {
    "Carrier": 5,
    "Battleship": 4,
    "Cruiser": 3,
    "Submarine": 3,
    "Destroyer": 2
}

turn = 0

for x in range(11):
    board.append(["O"] * 10)

def print_menuscreen():
    print
    print "   Battleship!                                 Written by samillwong" + "\n" + "  ",
    line()
    print
    print "   Arrange your ships on the grid by inputting the coordinates" + "\n" + "   (e.g. A6) and orientation (e.g. H)." + "\n"
    print "   Take turns firing a salvo at your enemy by inputting the" + "\n" + "   coordinate you wish to fire at. (e.g. C3)" + "\n"
    print "   The first player to sink all opposing ships wins." + "\n" + "\n" + "  ",
    line()
    print
    ask_username()

def userlogin():
    user = raw_input("Username: ")
    passw = raw_input("Password: ")
    f = open("users.txt", "w+")
    for line in f.readlines():
        us, pw = line.strip().split("|")
        if (user in us) and (passw in pw):
            print "Login successful!"
            return True
    print "Wrong username/password"
    return False

def ask_username():
    username = ""
    while username == "":
        username = raw_input("   Enter your username to start: ")
    #temp
    print "\n" + "   Welcome to Battleship, " + username + "!"
    time.sleep(3)

    #WORK IN PROGRESS
    """
    f = open("players.txt", "a+")
    f.seek(0)
    first_char = f.read(1)
    if not first_char:
        print f.write("List of players:")
    else:
        f.seek(0)

    for line in f.readlines():
        if username in line:
            print "\n" + "   Welcome back, " + username + "!"
            time.sleep(3)
        else:
            print "\n" + "   Welcome to Battleship, " + username + "!"
            time.sleep(3)
            f.write(username)
    f.close()
    """

def print_board(board):
    print_header()

    #print horizontal grid numbers
    print "    ",
    for i in range(10):
        print "  " + str(i+1) + "  ",
    print "\n"

    #print horizontal lines and cell dividers
    for i in range(10):
        if i != 9:
            print "   ",
            print "   -----------------------------------------------------------"
            for j in range(11):
                if j != 11:
                    print "  |  ",
            print

    print "   -----------------------------------------------------------"

def print_header():
    print "\n" + "   Turn", turn + 1
    print "  ",
    line()

def line():
    print "-----------------------------------------------------------------" #65 dashes

def random_row(board):
    return randint(1, len(board) - 1)

def random_col(board):
    return randint(1, len(board[0]) - 1)

clear()
print_menuscreen()
clear()
print "\n" + "   Let's play Battleship!"
print_board(board)

ship_row = random_row(board)
ship_col = random_col(board)

#that aint cheating, thats debugging :^)
print "Debug:", "x =", ship_row + 1,",", "y =", ship_col + 1

for turn in range(3):
    turn = turn + 1
    guess_row = int(raw_input("\n" + "   Guess Row: ")) - 1
    guess_col = int(raw_input("Guess Column: ")) - 1

    if guess_row == ship_row and guess_col == ship_col:
        clear()
        print "\n" + "Congratulations! You sunk my battleship!" + "\n"
        print_header()
        print_board(board)
        break
    else:
        if (guess_row >= 5) or (guess_col >= 5):
            clear()
            print "Oops, that's not even in the ocean."
        elif(board[guess_row][guess_col] == "X"):
            clear()
            print "You guessed that one already."
        else:
            if turn == 3:
                clear()
                print "\n" + "You ran out of turns, game over." + "\n" + "\n" + "Turn 4" + "\n" + "------------------------------"
            else:
                clear()
                print "\n" + "You missed my battleship!"
                board[guess_row][guess_col] = "X"
                print  "\n" + "Turn", turn + 1, "\n" + "------------------------------"

    # Print (turn + 1) here!
        print_board(board)