import os
import gradio as gr
from random import randint
from all_models import models

css_code = os.getenv("DazDinGo_CSS")

def load_fn(models):
    global models_load
    models_load = {}
    for model in models:
        if model not in models_load.keys():
            try:
                m = gr.load(f'models/{model}')
            except Exception as error:
                m = gr.Interface(lambda txt: None, ['text'], ['image'])
            models_load.update({model: m})

load_fn(models)

num_models = len(models)
default_models = models[:num_models]

def extend_choices(choices):
    return choices + (num_models - len(choices)) * ['NA']

def update_imgbox(choices):
    choices_plus = extend_choices(choices)
    return [gr.Image(None, label=m, visible=(m != 'NA'), elem_id="custom_image") for m in choices_plus]

def gen_fn(model_str, prompt):
    if model_str == 'NA':
        return None
    noise = str(randint(0, 99999999))
    return models_load[model_str](f'{prompt} {noise}')

def make_me():
    with gr.Row():
        with gr.Column(scale=4):
            txt_input = gr.Textbox(label='Your prompt:', lines=4, container=False, elem_id="custom_textbox", placeholder="Prompt", height=250)
        
        with gr.Column(scale=1):
            gen_button = gr.Button('Generate images', elem_id="custom_gen_button")
            stop_button = gr.Button('Stop', variant='secondary', interactive=False, elem_id="custom_stop_button")
            
            def on_generate_click():
                return gr.Button('Generate images', elem_id="custom_gen_button"), gr.Button('Stop', variant='secondary', interactive=True, elem_id="custom_stop_button")
            
            def on_stop_click():
                return gr.Button('Generate images', elem_id="custom_gen_button"), gr.Button('Stop', variant='secondary', interactive=False, elem_id="custom_stop_button")
            
            gen_button.click(on_generate_click, inputs=None, outputs=[gen_button, stop_button])
            stop_button.click(on_stop_click, inputs=None, outputs=[gen_button, stop_button])
    
    with gr.Row():
        output = [gr.Image(label=m, width=512, max_height=768, elem_id="custom_image", show_label=True, interactive=False, show_share_button=False) for m in default_models]
        current_models = [gr.Textbox(m, visible=False) for m in default_models]
        for m, o in zip(current_models, output):
            gen_event = gen_button.click(gen_fn, [m, txt_input], o)
            stop_button.click(on_stop_click, inputs=None, outputs=[gen_button, stop_button], cancels=[gen_event])
    
    with gr.Accordion('Model selection', elem_id="custom_accordion"):
        model_choice = gr.CheckboxGroup(models, label=f'{num_models} different models selected', value=default_models, interactive=True, elem_id="custom_checkbox_group")
        model_choice.change(update_imgbox, model_choice, output)
        model_choice.change(extend_choices, model_choice, current_models)
    
    with gr.Row():
        gr.HTML("")

with gr.Blocks(css=css_code) as demo: 
    make_me()

demo.queue(concurrency_count=50)
demo.launch()