# -*- coding: utf-8 -*-
"""
Created on Wed Feb 13 11:56:29 2019
Create a game where a character is on a 2D plane with x and y co-ordinates. Accept wasd input to move him in the 4 directions and update his position.
Print out a special message when he lands on the goal square, for example (9,3) and end the game.


xExtension 1: Count the number of moves the user takes.
xExtension 2: Make the game end after 30 moves.


Challenge: Give clues such as hot/cold to the destination after each step. Could use a numerical scale of hot and coldness. If you do MATH you better know how to calculate it properly.
xChallenge 2:Randomise the goal and start square each time. - you are free to skip this when testing
xChallenge 3: What about hotter or colder? Give hints that compare to the previous location
Challenge 4:At this point you might as well use ASCII characters and draw a board, use a symbol for squares and a symbol for the character. 
You can assume the board will only be 10x10, you don't need to go too crazy

You do not need arrays to do this task.

@author: achuang
"""

def main():
    
    import random
    import math
    
    player_y = random.randrange(1,10)
    player_x = random.randrange(1,10)
    
    prev_player_y = 0
    prev_player_x = 0
    
    move = 0
    tries = 0
    
    goal_x = random.randrange(1,10)
    goal_y = random.randrange(1,10)
    
    print("goal coordinates are: x" + str(goal_x) + " y" + str(goal_y))
    print("player coordinates are: x" + str(player_x) + " y" + str(player_y))
    
    while(int(tries) <= 20):
        
        skip = 0
        
        print("which direction would you like to move? use wasd")
        move = input()
        
        if(move == "w" and player_y != 10):
            prev_player_y = player_y
            player_y = player_y + 1
            tries = tries + 1
            print("x" + str(player_x) + " y" + str(player_y))
            print("you have used " + str(tries) + "/20 tries.")
        elif(move == "a" and player_x != 1):
            prev_player_x = player_x
            player_x = player_x - 1
            tries = tries + 1
            print("x" + str(player_x) + " y" + str(player_y))
            print("you have used " + str(tries) + "/20 tries.")
        elif(move == "s" and player_y != 1):
            prev_player_y = player_y
            player_y = player_y - 1
            tries = tries + 1
            print("x" + str(player_x) + " y" + str(player_y))
            print("you have used " + str(tries) + "/20 tries.")
        elif(move == "d" and player_x != 10):
            prev_player_x = player_x
            player_x = player_x + 1
            tries = tries + 1
            print("x" + str(player_x) + " y" + str(player_y))
            print("you have used " + str(tries) + "/20 tries.")
        else:
            print("invalid input, try again.")
            skip = 1
        
        if(player_x == goal_x and player_y == goal_y and skip == 0):
            print("you have reached the goal!")
            break
        
        if(skip == 0):
            player_x_dif = player_x - goal_x
            prev_player_x_dif = prev_player_x - goal_x
            player_x_dif = abs(player_x_dif)
            prev_player_x_dif = abs(prev_player_x_dif)
            player_y_dif = player_y - goal_y
            prev_player_y_dif = prev_player_y - goal_y
            player_y_dif = abs(player_y_dif)
            prev_player_y_dif = abs(prev_player_y_dif)
            current_dist = (player_x_dif * player_x_dif + player_y_dif * player_y_dif)
            prev_dist = (prev_player_x_dif * prev_player_x_dif + prev_player_y_dif * prev_player_y_dif)
            current_dist = (math.sqrt(current_dist))
            prev_dist = (math.sqrt(prev_dist))
            if(current_dist < prev_dist):
                print("warmer")
            elif(current_dist > prev_dist):
                print("colder")