"""
Created on Tue Apr  2 18:30:34 2013

@author: pietro
"""
from __future__ import (
    nested_scopes,
    generators,
    division,
    absolute_import,
    with_statement,
    print_function,
    unicode_literals,
)


def do_nothing(p):
    return p


def get_None(p):
    return None


def get_dict(p):
    return dict(p.items())


def get_values(p):
    return [e.text.strip() for e in p.findall("value/name")]


def read_text(p):
    return p.text.strip()


def read_keydesc(par):
    name = par.text.strip()
    items = [e.text.strip() for e in par.findall("item")]
    return name, tuple(items) if len(items) > 1 else None


GETFROMTAG = {
    "description": read_text,
    "keydesc": read_keydesc,
    "gisprompt": get_dict,
    "default": read_text,
    "values": get_values,
    "value": get_None,
    "guisection": read_text,
    "label": read_text,
    "suppress_required": get_None,
    "keywords": read_text,
    "guidependency": read_text,
    "rules": get_None,
}

GETTYPE = {
    "string": str,
    "integer": int,
    "float": float,
    "double": float,
    "file": str,
    "all": do_nothing,
}


def element2dict(xparameter):
    diz = dict(xparameter.items())
    for p in xparameter:
        if p.tag in GETFROMTAG:
            diz[p.tag] = GETFROMTAG[p.tag](p)
        else:
            print("New tag: %s, ignored" % p.tag)
    return diz


# dictionary used to create docstring for the objects
DOC = {
    # ------------------------------------------------------------
    # head
    "head": """{cmd_name}({cmd_params})

Parameters
----------

""",
    # ------------------------------------------------------------
    # param
    "param": """{name}: {default}{required}{multi}{ptype}
    {description}{values}{keydescvalues}""",
    # ------------------------------------------------------------
    # flag_head
    "flag_head": """
Flags
------
""",
    # ------------------------------------------------------------
    # flag
    "flag": """{name}: {default}, {supress}
    {description}""",
    # ------------------------------------------------------------
    # foot
    "foot": """
Special Parameters
------------------

The Module class have some optional parameters which are distinct using a final
underscore.

run_: True, optional
    If True execute the module.
finish_: True, optional
    If True wait until the end of the module execution, and store the module
    outputs into stdout, stderr attributes of the class.
stdin_: PIPE, optional
    Set the standard input.
env_: dictionary, optional
    Set the environment variables.
""",
}