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import gradio as gr
import json
import os

from typing import Dict, List, Union

import src.agents.coordinator as C

from src.frontend.chatbot import (
    MAX_OPTIONS,
    chatbot,
    init_graph,
    on_chatbot_response,
    option_buttons,
    restart_button
)
from src.frontend import sidebar
from src.utils.utils import (
    get_session_dir,
    save_information,
    transform_story_name
)

story_name_textbox = gr.Text(
    placeholder='Give your adventure a unique name!',
    label='Story Name',
    interactive=True,
    key='story_name_textbox',
    preserved_by_key='key',
    visible=False
)
story_context_textbox = gr.Text(
    placeholder='What kind of story would you like to adventure on?',
    label='Story Context',
    interactive=True,
    key='story_context_textbox',
    preserved_by_key='key',
    visible=False
)
categories_context_textbox = gr.Text(
    placeholder='What is the theme of the categories you want to have?',
    label='Categories Context',
    interactive=True,
    key='categories_context_textbox',
    preserved_by_key='key',
    visible=False
)
num_questions_slider = gr.Slider(
    minimum=1,
    maximum=10,
    value=5,
    step=1,
    label='How many questions would you want your journey to have?',
    interactive=True,
    visible=False,
    key='num_questions_slider',
    preserved_by_key='key'
)
num_options_slider = gr.Slider(
    minimum=2,
    maximum=4,
    value=2,
    step=1,
    label='How many options would you like at each turn?',
    interactive=True,
    visible=False,
    key='num_options_slider',
    preserved_by_key='key'
)
num_categories_slider = gr.Slider(
    minimum=2,
    maximum=MAX_OPTIONS,
    value=2,
    step=1,
    label='How many categories / endings would you like to have?',
    interactive=True,
    visible=False,
    key='num_categories_slider',
    preserved_by_key='key'
)
story_information_submit_button = gr.Button(
    visible=False,
    interactive=False,
    key='story_information_submit_button',
    preserved_by_key='key'
)

def get_widgets() -> List[Union[gr.Text, gr.Slider, gr.Button]]:
    return [
        story_name_textbox,
        story_context_textbox,
        categories_context_textbox,
        num_questions_slider,
        num_options_slider,
        num_categories_slider,
        story_information_submit_button
    ]


def get_widgets_updates(
    is_visible: bool
) -> Dict[Union[gr.Slider, gr.Text, gr.Button], gr.update]:
    return {
        widget: gr.update(visible=is_visible)
        for widget in get_widgets()
    }


def check_story_name(story_name: str) -> bool:
    story_name_dir = transform_story_name(story_name)
    return not story_name_dir in os.listdir(get_session_dir())


def on_text_change(
    story_name: str,
    story_context: str,
    categories_context: str
) -> gr.update:
    if all([story_name, story_context, categories_context]) and \
            check_story_name(story_name):
        return gr.update(interactive=True)
    return gr.update(interactive=False)


def save_story_information(
    story_name: str,
    story_context: str,
    categories_context: str,
    num_questions: int,
    num_options: int,
    num_categories: int
):
    story_name_dir = transform_story_name(story_name)
    story_dirpath = os.path.join(get_session_dir(), story_name_dir)
    os.mkdir(story_dirpath)

    story_information_filepath = os.path.join(story_dirpath, 'story.json')
    story_information = {
        'story_name': story_name,
        'story_context': story_context,
        'categories_context': categories_context,
        'num_questions':  num_questions,
        'num_options': num_options,
        'num_categories': num_categories
    }
    save_information(story_information, story_information_filepath)


def on_submit(
    story_name: str,
    story_context: str,
    categories_context: str,
    num_questions: int,
    num_options: int,
    num_categories: int
) -> Dict[Union[gr.Text, gr.Slider, gr.Button, gr.Chatbot], gr.update]:
    
    save_story_information(
        story_name,
        story_context,
        categories_context,
        num_questions,
        num_options,
        num_categories
    )
    C.story_name = transform_story_name(story_name)

    init_graph(
        story_context,
        categories_context,
        num_questions,
        num_options,
        num_categories
    )

    chatbot_updates = on_chatbot_response([])

    return chatbot_updates | get_widgets_updates(False) | sidebar.view_screen()


def render():

    for widget in get_widgets():
        widget.render()

        if not isinstance(widget, gr.Text):
            continue
        widget.change(
            fn=on_text_change,
            inputs=[
                story_name_textbox,
                story_context_textbox,
                categories_context_textbox
            ],
            outputs=[story_information_submit_button]
        )

    story_information_submit_button.click(
        fn=on_submit,
        inputs=[
            widget
            for widget in get_widgets()
            if not isinstance(widget, gr.Button)
        ],
        outputs=get_widgets() + \
            [chatbot, restart_button] + \
            option_buttons + \
            sidebar.get_widgets()
    )