#!/usr/bin/env python
# encoding: utf-8


from .operator import Operator, save_mainOp

class Mul(Operator):

    """ The operator *

    >>> mul = op.mul
    >>> mul
    '*'
    >>> mul(1, 2)
    2
    >>> mul.__tex__('1','2')
    '1 \\times 2'
    >>> mul.__tex__('2','a')
    '2 a'
    >>> mul.__txt__('1','2')
    '1 * 2'
    >>> mul.__txt__('2','a')
    '2 a'
    >>> mul.__txt__('a','2')
    'a * 2'
    >>> mul.__tex__('1','-2')
    '1 \\times (-2)'
    """

    _CARACT = {
        "operator" : "*", \
        "name" : "mul",\
        "priority" : 4, \
        "arity" : 2, \
        "actions" : ("__mul__","__rmul__"), \
        "txt" :  "{op1} * {op2}",\
        "tex" :  "{op1} \\times {op2}",\
    }

    def __init__(self):
        """ Initiate Mul Operator """
        super(Mul, self).__init__(**self._CARACT)

        # TODO: Add self.visibility |sam. nov.  8 17:00:08 CET 2014
        self.visibility = 1

    def is_visible(self, op1, op2):
        """ Tells whether self has to be visible or not

        :param op1: left operande
        :param op2: rigth operande

        """
        # TODO: À finir!!! |lun. mars  9 00:03:40 CET 2015
        if type(op2) == int:
            # op2 est maintenant une chaine de caractères
            return True
        elif op2.isdecimal():
            return True
        elif op2.isalpha():
            return False
        elif op2[0].isdecimal():
            return True
        elif op2[0] == "(" and not ("+" in op2 or "-" in op2[3:]):
            return True
        # Giga bricolage...
        elif "frac" in op2:
            return True
        else:
            return False

    def _render(self, link, *args):

        op1 = self.l_parenthesis(args[0], True)
        op2 = self.r_parenthesis(args[1], True)

        if not self.is_visible(op1, op2):
            ans = "{op1} {op2}".format(op1 = op1, op2 = op2)
        else:
            ans = link.format(op1 = op1, op2 = op2)

        ans = save_mainOp(ans, self)
        return ans





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