RPG2

import json
import sys

try:
    print("Retrieving player details")
    with open("gamedata2.json", "r") as f:
        gamedata = json.load(f)
        version = gamedata["version"]
        name = gamedata["playername"]
        health = gamedata["playerhealth"]
        currentRoom = gamedata["playercurrentRoom"]
        inventory = gamedata["inventory"]
except:
    print("No (valid) gamedata found, creating a new gamedata file")
    version = 2
    name = None
    health = 5
    currentRoom = 'Hall'
    inventory = []
    with open("gamedata2.json", "w") as f:
        json.dump(gamedata, f)

gamedata_valid = True

if not isinstance(version, int):
    print("no valid version information found")
    gamedata_valid = False

if version != 2:
    print("version of gamedata unknown [version:" + str(version) + "]")
    print("expected version 2")
    gamedata_valid = False

if not isinstance(name, str):
    print("no valid player name found")
    gamedata_valid = False

if name == '':
    print("no valid player name found")
    gamedata_valid = False

if not gamedata_valid:
    print("the retrieved game data are not valid - start a new game")
    version = 2
    name = None
    health = 5
    currentRoom = 'Hall'
    inventory = []

if health <= 0:
    print('You are already dead - but we give you a second chance!')
    version = 2
    health = 5
    currentRoom = 'Hall'
    inventory = []

if health > 5:
    for i in range(10):
        print("***** YOU ARE A CHEATER *****")
    sys.exit(1)

if currentRoom != 'Hall':
    if health == 5:
        for i in range(10):
            print("***** YOU ARE A CHEATER *****")
        sys.exit(1)

if currentRoom == 'Garden' and 'key' in inventory and 'potion' in inventory:
    print('You already escaped the house')
    resp = input('Do you want to give it another try? [y/n]>')
    if resp =='Y' or resp == 'y':
        version = 2
        health = 5
        currentRoom = 'Hall'
        inventory = []
    else:
        sys.exit(0)

def showInstructions():
    # Print a main menu and the commands
    print('''
RPG Game
========

Get to the Garden with a key and a potion.
Avoid the monsters!

You are getting tired; each time you move you lose 1 health point.

Commands:
  go [direction]
  get [item]
  quit
''')


def showStatus():
    # Print the player's current status
    print('---------------------------')
    print(name + ' is in the ' + currentRoom)
    print("Health : " + str(health))
    # Print the current inventory
    print("Inventory : " + str(inventory))
    # Print an item if there is one
    if "item" in rooms[currentRoom]:
        if rooms[currentRoom]['item'] not in inventory:
            print('You see a ' + rooms[currentRoom]['item'])
    print("---------------------------")


gamedata = {
    "version": version,
    "playername": name,
    "playerhealth": health,
    "playercurrentRoom": currentRoom,
    "inventory": inventory
}

with open("gamedata2.json", "w") as f:
    json.dump(gamedata, f)

# A dictionary linking a room to other room positions
rooms = {
    'Hall': {'south': 'Kitchen',
             'east': 'Dining Room',
             'item': 'key'
             },

    'Kitchen': {'north': 'Hall',
                'item': 'monster'
                },

    'Dining Room': {'west': 'Hall',
                    'south': 'Garden',
                    'item': 'potion'
                    },

    'Garden': {'north': 'Dining Room'}
}

# Ask the player their name
if name is None:
    name = input("What is your name, Adventurer? ")
    showInstructions()

# Loop forever
while True:

    showStatus()

    move = ''
    while move == '':
        move = input('>')

    move = move.lower().split()

    # Get the player's next 'move'
    # .split() breaks it up into an list array
    # e.g. typing 'go east' would give the list:
    # ['go','east']

    if move[0] == 'quit':
        break

    # If they type 'go' first
    if move[0] == 'go':
        health = health - 1
        # Check that they are allowed wherever they want to go
        if len(move) > 1:
            if move[1] in rooms[currentRoom]:
                # Set the current room to the new room
                currentRoom = rooms[currentRoom][move[1]]
            # or, if there is no door (link) to the new room
            else:
                print('You can\'t go that way!')

    # If they type 'get' first
    if move[0] == 'get':
        if len(move) > 1:
            # If the room contains an item, and the item is the one they want to get
            if 'item' in rooms[currentRoom] and move[1] in rooms[currentRoom]['item']:
                # Add the item to their inventory
                inventory += [move[1]]
                # Display a helpful message
                print(move[1] + ' got!')
                # Delete the item from the room
                del rooms[currentRoom]['item']
            # Otherwise, if the item isn't there to get
            else:
                # Tell them they can't get it
                print('Can\'t get ' + move[1] + '!')
        else:
            print('Can\'t get ' + move[1] + '!')

    # Player loses if they enter a room with a monster
    if 'item' in rooms[currentRoom] and 'monster' in rooms[currentRoom]['item']:
        print('A monster has got you... GAME OVER!')
        break

    if health <= 0:
        print('You collapse from exhaustion... GAME OVER!')

    # Player wins if they get to the garden with a key and a potion
    if currentRoom == 'Garden' and 'key' in inventory and 'potion' in inventory:
        print('You escaped the house... YOU WIN!')
        break

    gamedata = {
        "version": version,
        "playername": name,
        "playerhealth": health,
        "playercurrentRoom": currentRoom,
        "inventory": inventory
    }
    with open("gamedata2.json", "w") as f:
        json.dump(gamedata, f)

gamedata = {
    "version": version,
    "playername": name,
    "playerhealth": health,
    "playercurrentRoom": currentRoom,
    "inventory": inventory
}
with open("gamedata2.json", "w") as f:
    json.dump(gamedata, f)