from ply import yacc
from calclex import tokens


def p_command(p):
    'command : operate NUMBER article'
    index = p[3]

    if p[1] == 'Buy':
        tab[index] += p[2]
        print('OK. I am buying ' + str(p[2]) + ' new articles indexed as ' + str(index) + '.')
        print('No of articles in shop: ' + str(tab[index]))
    elif p[1] == 'Sell':
        if p[2] > tab[index]:
            print('I do not have as many articles as you want.')
        else:
            tab[index] -= p[2]
            print('OK. I am selling ' + str(p[2]) + ' articles indexed as ' + str(index) + '.')
            print('No of articles in shop: ' + str(tab[index]))


def p_article_attribute(p):
    'article : attribute article'
    p[0] = p[1] + p[2]


def p_attribute_color(p):
    'attribute : COLOR'
    p[0] = p[1]


def p_attribute_material(p):
    'attribute : MATERIAL'
    p[0] = 10 * p[1]


def p_attribute_size(p):
    'attribute : SIZE'
    p[0] = 100 * p[1]


def p_article_kind(p):
    'article : KIND'
    p[0] = 1000 * p[1]


def p_operate(p):
    'operate : OPERATE'
    p[0] = p[1]


def p_error(p):
    print("Syntax error in input!")


tab = []
for index in range(3000):
    tab.append(0)

parser = yacc.yacc()

while True:
    s = input('What can I do for you? \n')
    if s == 'Bye':
        break
    parser.parse(s)