#!/usr/bin/env python
# requires python 3 (or wide-char python 2.7, which you probably have to build from source)

# Return a SVG URL for an emoji character
# Example:
# `emojiurl heart` => 'https://twemoji.maxcdn.com/svg/2764.svg'

import sys
import requests
import emoji_data_python
from emoji_unicode import Emoji
from emoji_unicode.models import JOINER_CHARS
from emoji_unicode.utils import code_point_to_unicode


# Images: Use twemoji SVG from their CDN.
# Filenames are lowercase, with hyphens separating codepoints, e.g. "1f1e8-1f1f3.svg"
# BASE_URL = "https://twemoji.maxcdn.com/svg/{}.svg"
BASE_URL = "https://cdnjs.cloudflare.com/ajax/libs/twemoji/11.1.0/2/svg/{}.svg"

SEP = "-"

# max suggestions
MAX_SUGGEST = 30


def with_joiners(thing):
    # Emoji codes including ZWJ characters
    hexcodes = ["{pt:x}".format(pt=ord(c)) for c in thing]
    return SEP.join(
        c.lstrip('0').lower()
        for c in hexcodes
    )


def without_joiners(thing):
    # Emoji codes excluding ZWJ characters
    hexcodes = ["{pt:x}".format(pt=ord(c)) for c in thing]
    return SEP.join(
        c.lstrip('0').lower()
        for c in hexcodes
        if code_point_to_unicode(c) not in JOINER_CHARS
    )


def popular():
    # Suggest some of the most popular
    popularmoji = requests.get("https://api.emojitracker.com/v1/rankings").json()[:MAX_SUGGEST]
    popular = []
    for p in popularmoji:
        e = emoji_data_python.find_by_name(p["name"])
        if e:
            popular.append(e[0].short_name)

    sys.stderr.write("Try: {}\n".format(" ".join(popular)))


def suggest(arg):
    # Suggest based on the argument
    if arg == "":
        popular()
    else:
        choices = emoji_data_python.find_by_shortname(arg)
        if choices == []:
            choices = emoji_data_python.find_by_name(arg)
        if choices == []:
            sys.stderr.write("Not found! ")
            popular()
        else:
            cn = sorted([(choice.short_name or choice.name).lower() for choice in choices])[:MAX_SUGGEST]
            sys.stderr.write("Not found! Try: {}\n".format(", ".join(cn)))


def main():
    s = requests.Session()
    for arg in sys.argv[1:]:
        arg = arg.lower()
        if arg == "":
            continue

        # See if there's a simple match
        emoji = emoji_data_python.emoji_short_names.get(arg)
        if emoji is None:
            suggest(arg)
            sys.exit(1)

        # print(emoji.__dict__)

        # Get the SVG URL: first try 'unified'
        uri = BASE_URL.format(emoji.unified.lower())
        r = s.head(uri)
        if r.status_code != 200:
            # Try with joiners
            uri = BASE_URL.format(with_joiners(emoji.char))
            r = s.head(uri)
        if r.status_code != 200:
            # Try without joiners
            uri = BASE_URL.format(without_joiners(emoji.char))
            r = s.head(uri)

        if r.status_code == 200:
            # OK, found it
            print(uri)
            sys.exit(0)
        else:
            # Suggest alternatives that might be findable
            suggest(arg)
            sys.exit(1)

    suggest(arg)
    sys.exit(1)


main()