# -*- coding: utf-8 -*-

# Tested on Markdown 2.3.1
#
# Copyright (c) 2014, Esteban Castro Borsani
# Copyright (c) 2014, Jesús Espino García
# The MIT License (MIT)
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.


import re

from django.conf import settings

from markdown.extensions import Extension
from markdown.preprocessors import Preprocessor


# Grab the emojis (+800) here: https://github.com/arvida/emoji-cheat-sheet.com
# This **crazy long** list was generated by walking through the emojis.png
emojis_path = "{}://{}/static/img/emojis/".format(settings.SITES["api"]["scheme"], settings.SITES["api"]["domain"])
emojis_set = {
    "+1", "-1", "100", "1234", "8ball", "a", "ab", "abc", "abcd", "accept", "aerial_tramway", "airplane",
    "alarm_clock", "alien", "ambulance", "anchor", "angel", "anger", "angry", "anguished", "ant", "apple",
    "aquarius", "aries", "arrows_clockwise", "arrows_counterclockwise", "arrow_backward", "arrow_double_down",
    "arrow_double_up", "arrow_down", "arrow_down_small", "arrow_forward", "arrow_heading_down", "arrow_heading_up",
    "arrow_left", "arrow_lower_left", "arrow_lower_right", "arrow_right", "arrow_right_hook", "arrow_up",
    "arrow_upper_left", "arrow_upper_right", "arrow_up_down", "arrow_up_small", "art", "articulated_lorry",
    "astonished", "atm", "b", "baby", "baby_bottle", "baby_chick", "baby_symbol", "baggage_claim", "balloon",
    "ballot_box_with_check", "bamboo", "banana", "bangbang", "bank", "barber", "bar_chart", "baseball", "basketball",
    "bath", "bathtub", "battery", "bear", "bee", "beer", "beers", "beetle", "beginner", "bell", "bento", "bicyclist",
    "bike", "bikini", "bird", "birthday", "black_circle", "black_joker", "black_nib", "black_square",
    "black_square_button", "blossom", "blowfish", "blue_book", "blue_car", "blue_heart", "blush", "boar", "boat",
    "bomb", "book", "bookmark", "bookmark_tabs", "books", "boom", "boot", "bouquet", "bow", "bowling", "bowtie",
    "boy", "bread", "bride_with_veil", "bridge_at_night", "briefcase", "broken_heart", "bug", "bulb",
    "bullettrain_front", "bullettrain_side", "bus", "busstop", "busts_in_silhouette", "bust_in_silhouette",
    "cactus", "cake", "calendar", "calling", "camel", "camera", "cancer", "candy", "capital_abcd", "capricorn",
    "car", "card_index", "carousel_horse", "cat", "cat2", "cd", "chart", "chart_with_downwards_trend",
    "chart_with_upwards_trend", "checkered_flag", "cherries", "cherry_blossom", "chestnut", "chicken",
    "children_crossing", "chocolate_bar", "christmas_tree", "church", "cinema", "circus_tent", "city_sunrise",
    "city_sunset", "cl", "clap", "clapper", "clipboard", "clock1", "clock10", "clock1030", "clock11", "clock1130",
    "clock12", "clock1230", "clock130", "clock2", "clock230", "clock3", "clock330", "clock4", "clock430", "clock5",
    "clock530", "clock6", "clock630", "clock7", "clock730", "clock8", "clock830", "clock9", "clock930",
    "closed_book", "closed_lock_with_key", "closed_umbrella", "cloud", "clubs", "cn", "cocktail", "coffee",
    "cold_sweat", "collision", "computer", "confetti_ball", "confounded", "confused", "congratulations",
    "construction", "construction_worker", "convenience_store", "cookie", "cool", "cop", "copyright", "corn",
    "couple", "couplekiss", "couple_with_heart", "cow", "cow2", "credit_card", "crocodile", "crossed_flags",
    "crown", "cry", "crying_cat_face", "crystal_ball", "cupid", "curly_loop", "currency_exchange", "curry",
    "custard", "customs", "cyclone", "dancer", "dancers", "dango", "dart", "dash", "date", "de", "deciduous_tree",
    "department_store", "diamonds", "diamond_shape_with_a_dot_inside", "disappointed", "disappointed_relieved",
    "dizzy", "dizzy_face", "dog", "dog2", "dollar", "dolls", "dolphin", "donut", "door", "doughnut",
    "do_not_litter", "dragon", "dragon_face", "dress", "dromedary_camel", "droplet", "dvd", "e-mail", "ear",
    "earth_africa", "earth_americas", "earth_asia", "ear_of_rice", "egg", "eggplant", "eight",
    "eight_pointed_black_star", "eight_spoked_asterisk", "electric_plug", "elephant", "email", "end", "envelope",
    "es", "euro", "european_castle", "european_post_office", "evergreen_tree", "exclamation", "expressionless",
    "eyeglasses", "eyes", "facepunch", "factory", "fallen_leaf", "family", "fast_forward", "fax", "fearful",
    "feelsgood", "feet", "ferris_wheel", "file_folder", "finnadie", "fire", "fireworks", "fire_engine",
    "first_quarter_moon", "first_quarter_moon_with_face", "fish", "fishing_pole_and_fish", "fish_cake", "fist",
    "five", "flags", "flashlight", "floppy_disk", "flower_playing_cards", "flushed", "foggy", "football",
    "fork_and_knife", "fountain", "four", "four_leaf_clover", "fr", "free", "fried_shrimp", "fries", "frog",
    "frowning", "fu", "fuelpump", "full_moon", "full_moon_with_face", "game_die", "gb", "gem", "gemini", "ghost",
    "gift", "gift_heart", "girl", "globe_with_meridians", "goat", "goberserk", "godmode", "golf", "grapes",
    "green_apple", "green_book", "green_heart", "grey_exclamation", "grey_question", "grimacing", "grin",
    "grinning", "guardsman", "guitar", "gun", "haircut", "hamburger", "hammer", "hamster", "hand", "handbag",
    "hankey", "hash", "hatched_chick", "hatching_chick", "headphones", "heart", "heartbeat", "heartpulse",
    "hearts", "heart_decoration", "heart_eyes", "heart_eyes_cat", "hear_no_evil", "heavy_check_mark",
    "heavy_division_sign", "heavy_dollar_sign", "heavy_exclamation_mark", "heavy_minus_sign",
    "heavy_multiplication_x", "heavy_plus_sign", "helicopter", "herb", "hibiscus", "high_brightness",
    "high_heel", "hocho", "honeybee", "honey_pot", "horse", "horse_racing", "hospital", "hotel", "hotsprings",
    "hourglass", "hourglass_flowing_sand", "house", "house_with_garden", "hurtrealbad", "hushed", "icecream",
    "ice_cream", "id", "ideograph_advantage", "imp", "inbox_tray", "incoming_envelope", "information_desk_person",
    "information_source", "innocent", "interrobang", "iphone", "it", "izakaya_lantern", "jack_o_lantern", "japan",
    "japanese_castle", "japanese_goblin", "japanese_ogre", "jeans", "joy", "joy_cat", "jp", "key", "keycap_ten",
    "kimono", "kiss", "kissing", "kissing_cat", "kissing_closed_eyes", "kissing_face", "kissing_heart",
    "kissing_smiling_eyes", "koala", "koko", "kr", "large_blue_circle", "large_blue_diamond", "large_orange_diamond",
    "last_quarter_moon", "last_quarter_moon_with_face", "laughing", "leaves", "ledger", "leftwards_arrow_with_hook",
    "left_luggage", "left_right_arrow", "lemon", "leo", "leopard", "libra", "light_rail", "link", "lips",
    "lipstick", "lock", "lock_with_ink_pen", "lollipop", "loop", "loudspeaker", "love_hotel", "love_letter",
    "low_brightness", "m", "mag", "mag_right", "mahjong", "mailbox", "mailbox_closed", "mailbox_with_mail",
    "mailbox_with_no_mail", "man", "mans_shoe", "man_with_gua_pi_mao", "man_with_turban", "maple_leaf", "mask",
    "massage", "meat_on_bone", "mega", "melon", "memo", "mens", "metal", "metro", "microphone", "microscope",
    "milky_way", "minibus", "minidisc", "mobile_phone_off", "moneybag", "money_with_wings", "monkey", "monkey_face",
    "monorail", "moon", "mortar_board", "mountain_bicyclist", "mountain_cableway", "mountain_railway",
    "mount_fuji", "mouse", "mouse2", "movie_camera", "moyai", "muscle", "mushroom", "musical_keyboard",
    "musical_note", "musical_score", "mute", "nail_care", "name_badge", "neckbeard", "necktie",
    "negative_squared_cross_mark", "neutral_face", "new", "newspaper", "new_moon", "new_moon_with_face",
    "ng", "nine", "non-potable_water", "nose", "notebook", "notebook_with_decorative_cover", "notes", "no_bell",
    "no_bicycles", "no_entry", "no_entry_sign", "no_good", "no_mobile_phones", "no_mouth", "no_pedestrians",
    "no_smoking", "nut_and_bolt", "o", "o2", "ocean", "octocat", "octopus", "oden", "office", "ok", "ok_hand",
    "ok_woman", "older_man", "older_woman", "on", "oncoming_automobile", "oncoming_bus", "oncoming_police_car",
    "oncoming_taxi", "one", "open_file_folder", "open_hands", "open_mouth", "ophiuchus", "orange_book",
    "outbox_tray", "ox", "pager", "page_facing_up", "page_with_curl", "palm_tree", "panda_face", "paperclip",
    "parking", "partly_sunny", "part_alternation_mark", "passport_control", "paw_prints", "peach", "pear",
    "pencil", "pencil2", "penguin", "pensive", "performing_arts", "persevere", "person_frowning",
    "person_with_blond_hair", "person_with_pouting_face", "phone", "pig", "pig2", "pig_nose", "pill",
    "pineapple", "pisces", "pizza", "plus1", "point_down", "point_left", "point_right", "point_up",
    "point_up_2", "police_car", "poodle", "poop", "postal_horn", "postbox", "post_office", "potable_water",
    "pouch", "poultry_leg", "pound", "pouting_cat", "pray", "princess", "punch", "purple_heart", "purse",
    "pushpin", "put_litter_in_its_place", "question", "rabbit", "rabbit2", "racehorse", "radio", "radio_button",
    "rage", "rage1", "rage2", "rage3", "rage4", "railway_car", "rainbow", "raised_hand", "raised_hands",
    "raising_hand", "ram", "ramen", "rat", "recycle", "red_car", "red_circle", "registered", "relaxed",
    "relieved", "repeat", "repeat_one", "restroom", "revolving_hearts", "rewind", "ribbon", "rice", "rice_ball",
    "rice_cracker", "rice_scene", "ring", "rocket", "roller_coaster", "rooster", "rose", "rotating_light",
    "round_pushpin", "rowboat", "ru", "rugby_football", "runner", "running", "running_shirt_with_sash", "sa",
    "sagittarius", "sailboat", "sake", "sandal", "santa", "satellite", "satisfied", "saxophone", "school",
    "school_satchel", "scissors", "scorpius", "scream", "scream_cat", "scroll", "seat", "secret", "seedling",
    "see_no_evil", "seven", "shaved_ice", "sheep", "shell", "ship", "shipit", "shirt", "shit", "shoe", "shower",
    "signal_strength", "six", "six_pointed_star", "ski", "skull", "sleeping", "sleepy", "slot_machine",
    "small_blue_diamond", "small_orange_diamond", "small_red_triangle", "small_red_triangle_down", "smile",
    "smiley", "smiley_cat", "smile_cat", "smiling_imp", "smirk", "smirk_cat", "smoking", "snail", "snake",
    "snowboarder", "snowflake", "snowman", "sob", "soccer", "soon", "sos", "sound", "space_invader", "spades",
    "spaghetti", "sparkler", "sparkles", "sparkling_heart", "speaker", "speak_no_evil", "speech_balloon",
    "speedboat", "squirrel", "star", "star2", "stars", "station", "statue_of_liberty", "steam_locomotive",
    "stew", "straight_ruler", "strawberry", "stuck_out_tongue", "stuck_out_tongue_closed_eyes",
    "stuck_out_tongue_winking_eye", "sunflower", "sunglasses", "sunny", "sunrise", "sunrise_over_mountains",
    "sun_with_face", "surfer", "sushi", "suspect", "suspension_railway", "sweat", "sweat_drops", "sweat_smile",
    "sweet_potato", "swimmer", "symbols", "syringe", "tada", "tanabata_tree", "tangerine", "taurus", "taxi",
    "tea", "telephone", "telephone_receiver", "telescope", "tennis", "tent", "thought_balloon", "three",
    "thumbsdown", "thumbsup", "ticket", "tiger", "tiger2", "tired_face", "tm", "toilet", "tokyo_tower", "tomato",
    "tongue", "top", "tophat", "tractor", "traffic_light", "train", "train2", "tram", "triangular_flag_on_post",
    "triangular_ruler", "trident", "triumph", "trolleybus", "trollface", "trophy", "tropical_drink",
    "tropical_fish", "truck", "trumpet", "tshirt", "tulip", "turtle", "tv", "twisted_rightwards_arrows",
    "two", "two_hearts", "two_men_holding_hands", "two_women_holding_hands", "u5272", "u5408", "u55b6",
    "u6307", "u6708", "u6709", "u6e80", "u7121", "u7533", "u7981", "u7a7a", "uk", "umbrella", "unamused",
    "underage", "unlock", "up", "us", "v", "vertical_traffic_light", "vhs", "vibration_mode", "video_camera",
    "video_game", "violin", "virgo", "volcano", "vs", "walking", "waning_crescent_moon", "waning_gibbous_moon",
    "warning", "watch", "watermelon", "water_buffalo", "wave", "wavy_dash", "waxing_crescent_moon",
    "waxing_gibbous_moon", "wc", "weary", "wedding", "whale", "whale2", "wheelchair", "white_check_mark",
    "white_circle", "white_flower", "white_square", "white_square_button", "wind_chime", "wine_glass",
    "wink", "wolf", "woman", "womans_clothes", "womans_hat", "womens", "worried", "wrench", "x", "yellow_heart",
    "yen", "yum", "zap", "zero", "zzz",
}


class EmojifyExtension(Extension):

    def extendMarkdown(self, md, md_globals):
        md.registerExtension(self)
        md.preprocessors.add('emojify',
                             EmojifyPreprocessor(md),
                             '_end')


class EmojifyPreprocessor(Preprocessor):

    def run(self, lines):
        pattern = re.compile(':([a-z0-9\+\-_]+):')

        new_lines = []

        def emojify(match):
            emoji = match.group(1)

            if emoji not in emojis_set:
                return match.group(0)

            url = emojis_path + emoji + u'.png'

            return '![{emoji}]({url})'.format(emoji=emoji, url=url)

        for line in lines:
            if line.strip():
                line = pattern.sub(emojify, line)

            new_lines.append(line)

        return new_lines
