import gradio as gr
from transformers import pipeline
import random
import re
import torch
import spaces

title = "WoW Quest Text Generator"
description = "Tap on the \"Submit\" button to generate a random quest text."
article = "<p>Fine tuned <a href=\"https://huggingface.co/EleutherAI/gpt-neo-125M\">EleutherAI/gpt-neo-125M</a> upon a formatted <a href=\"https://github.com/TrinityCore/TrinityCore\"> TrinityCore – TDB_full_world_927.22082_2022_08_21 Dataset</a></p><p>This generator is fan made and is not affiliated in any way with Blizzard and/or any other company</p>"

CUDA_AVAILABLE = torch.cuda.is_available()
device = torch.device("cuda" if CUDA_AVAILABLE else "cpu")

model_id = "./model"
text_generator = pipeline("text-generation", model=model_id, tokenizer=model_id, device=device)
max_length = 256
top_k = 40
top_p = 0.92
temperature = 1.0

random.seed(None)

wow_class_list = ["Death Knight", "Demon Hunter", "Druid", "Hunter", "Mage", "Monk", "Paladin", "Priest", "Rogue", "Shaman", "Warrior", "Warlock"]
wow_race_list = ["Blood Elf", "Human", "Tauren", "Orc", "Kul Tiran", "Void Elf", "Troll", "Vulpera", "Night Elf", "Zandalari Troll", "Worgen", "Undead", "Goblin", "Highmountain Tauren", "Nightborne", "Dwarf", "Draenei", "Gnome", "Lightforged Draenei", "Pandaren", "Maghar Orc", "Mechagnome", "Dark Iron Dwarf"]
wow_silly_name_list = ["Glitterstorm", "Sunderwear", "Arrowdynamic", "Sapntap", "Crossblesser", "Praystation", "Healium", "Shocknorris", "Alestrom", "Harryportal", "Merlìn", "Wreckquiem", "Owlcapone"]

suggested_text_list = ["Greetings $r", "$c I need your help", "Good to see you $n", "Hey $gBoy:Girl; "]

def parseGenderTokens(text):
    regex = r"\$[gG]([^:]+):([^;]+);"
    matches = re.finditer(regex, text, re.MULTILINE)
    parsed_string = ""
    prev_index = 0
    group_num = 0
    random_group = -1    
    for matchNum, match in enumerate(matches, start=1):    
        parsed_string += text[prev_index:match.start()]            
        if random_group == -1:
            group_num = len(match.groups())
            random_group = random.randint(1, group_num)
        parsed_string += match.group(random_group)
        prev_index = match.end(group_num) + 1
    parsed_string += text[prev_index:]
    return parsed_string

def parseSpecialCharacters(text, wow_class_item, wow_race_item, wow_silly_name_item):
    parsedText = text.replace("$a", "\n").replace("$B", "\n").replace("$b", "\n").replace("$c", wow_class_item).replace("$C", wow_class_item).replace("$r", wow_race_item).replace("$R", wow_race_item).replace("$n", wow_silly_name_item).replace("$N", wow_silly_name_item)
    return parseGenderTokens(parsedText)

@spaces.GPU
def text_generation(input_text = None):
    if input_text == None or len(input_text) == 0:
        input_text = "<|startoftext|>"
    else:        
        if input_text.startswith("<|startoftext|>") == False:            
            input_text ="<|startoftext|>" + input_text
    generated_text = text_generator(input_text,
    max_length=max_length,
    top_k=top_k, 
    top_p=top_p,
    temperature=temperature,
    do_sample=True,
    repetition_penalty=2.0,
    num_return_sequences=1)
    parsed_text = generated_text[0]["generated_text"].replace("<|startoftext|>", "").replace("\r","").replace("\n\n", "\n").replace("\t", " ").replace("<|pad|>", " * ").replace("\"\"", "\"")
    wow_class_item = random.choice(wow_class_list)
    wow_race_item = random.choice(wow_race_list)
    wow_silly_name_item = random.choice(wow_silly_name_list)
    parsed_text = parseSpecialCharacters(parsed_text, wow_class_item, wow_race_item, wow_silly_name_item)
    parsed_text = parsed_text.replace("\\n", "\n")
    return parsed_text

demo = gr.Interface(
    text_generation,    
    inputs=gr.Textbox(Textbox(lines=1, label="Enter strating text or leave blank"),
    outputs=gr.Textbox(type="text", label="Generated quest text")],
    title=title,
    description=description,
    article=article,
    examples=suggested_text_list,
    theme="default",
    allow_flagging=False,
)

demo.queue()
demo.launch()