import re
from random import randrange

# CONFIG
LOOT = """
        <item id="2148" chance="30000" countmax="30"/><!-- 30 30% gold coin -->
        <item id="2148" chance="40000" countmax="25"/><!-- 25 40% gold coin -->
        <item id="2148" chance="40000" countmax="40"/><!-- 40 40% gold coin -->
        <item id="2489" chance="7000"/><!-- 5% dark armor -->
        <item id="2647" chance="1500"/><!-- 1.5% plate legs -->
        <item id="2497" chance="500"/><!-- 0.5% crusader helmet -->
        <item id="1987" chance="90000"><!-- 90% bag -->
            <inside>
                <item id="2044" chance="8000"/><!-- 8% lamp -->
                <item id="2377" chance="5000"/><!-- 5% two handed sword -->
                <item id="2209" chance="900"/><!-- 0.9% club ring -->
                <item id="2425" chance="1200"/><!-- 1,2% obsidian lance -->
                <item id="2509" chance="3000"/><!-- 3% steel shield -->
                <item id="2149" chance="1000" countmax="2"/> <!-- 2 1% small emerald -->
""".splitlines()


REGEXP_RULES = {'chance': 'chance=\"(\d*)\"',
                'id': 'id=\"(\d*)\"',
                'countmax': 'countmax=\"(\d*)\"'}

VALUES = {
    # itemid: price_per_item
    2148: 1,
}


def collect_values(LOOT):
    global POSSIBLE_ITEMS
    for item in LOOT:
        if item is not None and item != "":
            try:
                item_id = int(re.search(REGEXP_RULES['id'], item).group(1))
            except:
                continue
            try:
                loot_countmax = int(re.search(REGEXP_RULES['countmax'], item).group(1))
            except:
                loot_countmax = 1
            POSSIBLE_ITEMS.append({'id': item_id,
                                   'chance': int(re.search(REGEXP_RULES['chance'], item).group(1)) / 1000,
                                   'countmax': loot_countmax})


LOOTED = {}
POSSIBLE_ITEMS = []


def pretend_loot():
    global LOOTED
    global POSSIBLE_ITEMS
    for item in POSSIBLE_ITEMS:
        rand = randrange(101)  # from <0-100> included
        if rand <= item['chance']:
            count = 1
            if int(item['countmax']) > 1:
                count = randrange(int(item['countmax']) + 1)
            try:
                LOOTED[item['id']] = LOOTED[item['id']] + count
            except:
                LOOTED[item['id']] = count


def calculate_value():
    global VALUES
    global LOOTED
    value = 0
    for item in LOOTED:
        if item in VALUES:
            value += LOOTED[item] * VALUES[item]
        else:
            print("Couldn't find {} in VALUES".format(item))
    print("End value is: {}".format(value))

TRIES = 1000
collect_values(LOOT)
for i in range(0, TRIES):
    pretend_loot()
print(LOOTED)
calculate_value()