import hashlib
import collections
import re

from util import hook, text


# variables

colors = collections.OrderedDict([
    ('red', '\x0304'),
    ('orange', '\x0307'),
    ('yellow', '\x0308'),
    ('green', '\x0309'),
    ('cyan', '\x0303'),
    ('ltblue', '\x0310'),
    ('rylblue', '\x0312'),
    ('blue', '\x0302'),
    ('magenta', '\x0306'),
    ('pink', '\x0313'),
    ('maroon', '\x0305')
])

# helper functions

strip_re = re.compile("(\x03|\x02|\x1f)(?:,?\d{1,2}(?:,\d{1,2})?)?", re.UNICODE)


def strip(string):
    return strip_re.sub('', string)


# basic text tools


## TODO: make this capitalize sentences correctly
@hook.command("capitalise")
@hook.command
def capitalize(inp):
    """capitalize <string> -- Capitalizes <string>."""
    return inp.capitalize()


@hook.command
def upper(inp):
    """upper <string> -- Convert string to uppercase."""
    return inp.upper()


@hook.command
def lower(inp):
    """lower <string> -- Convert string to lowercase."""
    return inp.lower()


@hook.command
def titlecase(inp):
    """title <string> -- Convert string to title case."""
    return inp.title()


@hook.command
def swapcase(inp):
    """swapcase <string> -- Swaps the capitalization of <string>."""
    return inp.swapcase()


# encoding


@hook.command
def rot13(inp):
    """rot13 <string> -- Encode <string> with rot13."""
    return inp.encode('rot13')


@hook.command
def base64(inp):
    """base64 <string> -- Encode <string> with base64."""
    return inp.encode('base64')


@hook.command
def unbase64(inp):
    """unbase64 <string> -- Decode <string> with base64."""
    return inp.decode('base64')


@hook.command
def checkbase64(inp):
    try:
        decoded = inp.decode('base64')
        recoded = decoded.encode('base64').strip()
        is_base64 = recoded == inp
    except:
        return '"{}" is not base64 encoded'.format(inp)

    if is_base64:
        return '"{}" is base64 encoded'.format(recoded)
    else:
        return '"{}" is not base64 encoded'.format(inp)


@hook.command
def unescape(inp):
    """unescape <string> -- Unescapes <string>."""
    try:
        return inp.decode('unicode-escape')
    except Exception as e:
        return "Error: {}".format(e)


@hook.command
def escape(inp):
    """escape <string> -- Escapes <string>."""
    try:
        return inp.encode('unicode-escape')
    except Exception as e:
        return "Error: {}".format(e)


# length


@hook.command
def length(inp):
    """length <string> -- gets the length of <string>"""
    return "The length of that string is {} characters.".format(len(inp))


# reverse


@hook.command
def reverse(inp):
    """reverse <string> -- reverses <string>."""
    return inp[::-1]


# hashing


@hook.command("hash")
def hash_command(inp):
    """hash <string> -- Returns hashes of <string>."""
    return ', '.join(x + ": " + getattr(hashlib, x)(inp).hexdigest()
                     for x in ['md5', 'sha1', 'sha256'])


# novelty


@hook.command
def munge(inp):
    """munge <text> -- Munges up <text>."""
    return text.munge(inp)


# colors - based on code by Reece Selwood - <https://github.com/hitzler/homero>


@hook.command
def rainbow(inp):
    inp = unicode(inp)
    inp = strip(inp)
    col = colors.items()
    out = ""
    l = len(colors)
    for i, t in enumerate(inp):
        if t == " ":
            out += t
        else:
            out += col[i % l][1] + t
    return out


@hook.command
def wrainbow(inp):
    inp = unicode(inp)
    col = colors.items()
    inp = strip(inp).split(' ')
    out = []
    l = len(colors)
    for i, t in enumerate(inp):
        out.append(col[i % l][1] + t)
    return ' '.join(out)


@hook.command
def usa(inp):
    inp = strip(inp)
    c = [colors['red'], '\x0300', colors['blue']]
    l = len(c)
    out = ''
    for i, t in enumerate(inp):
        out += c[i % l] + t
    return out