import gradio as gr
import json
import logging
import argparse
import torch
import os
from os import path
from PIL import Image
import numpy as np
import spaces
import copy
import random
import time
from typing import Any, Dict, List, Optional, Union
from huggingface_hub import hf_hub_download
from diffusers import DiffusionPipeline, AutoencoderTiny, AutoPipelineForImage2Image, ConfigMixin, FluxTransformer2DModel
import safetensors.torch
from safetensors.torch import load_file
from pipeline import FluxWithCFGPipeline
from transformers import CLIPModel, CLIPProcessor, CLIPConfig
import gc
import warnings
import safetensors.torch


cache_path = path.join(path.dirname(path.abspath(__file__)), "models")
os.environ["TRANSFORMERS_CACHE"] = cache_path
os.environ["HF_HUB_CACHE"] = cache_path
os.environ["HF_HOME"] = cache_path

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

torch.backends.cuda.matmul.allow_tf32 = True

# Load LoRAs from JSON file
with open('loras.json', 'r') as f:
    loras = json.load(f)

dtype = torch.bfloat16

pipe = FluxWithCFGPipeline.from_pretrained("ostris/OpenFLUX.1", torch_dtype=dtype, num_single_layers=0, chunk_size=0).to("cuda")

pipe.vae = AutoencoderTiny.from_pretrained("madebyollin/taef1", torch_dtype=dtype).to("cuda")

pipe.to("cuda")
clipmodel = 'norm'
if clipmodel == "long":
    model_id = "zer0int/LongCLIP-GmP-ViT-L-14"
    config = CLIPConfig.from_pretrained(model_id)
    maxtokens = 77
if clipmodel == "norm":
    model_id = "zer0int/CLIP-GmP-ViT-L-14"
    config = CLIPConfig.from_pretrained(model_id)
    maxtokens = 512
clip_model = CLIPModel.from_pretrained(model_id, torch_dtype=torch.bfloat16, config=config, ignore_mismatched_sizes=False).to("cuda")
clip_processor = CLIPProcessor.from_pretrained(model_id, padding="max_length", max_length=maxtokens, ignore_mismatched_sizes=False, return_tensors="pt", truncation=True)
pipe.tokenizer = clip_processor.tokenizer
pipe.text_encoder = clip_model.text_model
pipe.tokenizer_max_length = maxtokens
pipe.text_encoder.dtype = torch.bfloat16
torch.cuda.empty_cache()

num_single_layers=0 
chunk_size=0

MAX_SEED = 2**32-1

class calculateDuration:
    def __init__(self, activity_name=""):
        self.activity_name = activity_name

    def __enter__(self):
        self.start_time = time.time()
        return self
    
    def __exit__(self, exc_type, exc_value, traceback):
        self.end_time = time.time()
        self.elapsed_time = self.end_time - self.start_time
        if self.activity_name:
            print(f"Elapsed time for {self.activity_name}: {self.elapsed_time:.6f} seconds")
        else:
            print(f"Elapsed time: {self.elapsed_time:.6f} seconds")


def update_selection(evt: gr.SelectData, width, height):
    selected_lora = loras[evt.index]
    new_placeholder = f"Type a prompt for {selected_lora['title']}"
    lora_repo = selected_lora["repo"]
    updated_text = f"### Selected: [{lora_repo}](https://huggingface.co/{lora_repo}) ✨"
    if "aspect" in selected_lora:
        if selected_lora["aspect"] == "portrait":
            width = 768
            height = 1024
        elif selected_lora["aspect"] == "landscape":
            width = 1024
            height = 768
    return (
        gr.update(placeholder=new_placeholder),
        updated_text,
        evt.index,
        width,
        height,
    )

@spaces.GPU(duration=70)
def generate_image(prompt, trigger_word, steps, seed, cfg_scale, width, height, negative_prompt, lora_scale, progress):
    pipe.to("cuda")
    generator = torch.Generator(device="cuda").manual_seed(seed)
    
    with calculateDuration("Generating image"):
        # Generate image
        image = pipe(
            prompt=f"{prompt} {trigger_word}",
            negative_prompt=negative_prompt,
            num_inference_steps=steps,
            guidance_scale=cfg_scale,
            width=width,
            height=height,
            generator=generator,
            joint_attention_kwargs={"scale": lora_scale},
        ).images[0]
    return image

def run_lora(prompt, cfg_scale, steps, selected_index, randomize_seed, seed, width, height, negative_prompt, lora_scale, progress=gr.Progress(track_tqdm=True)):
    if negative_prompt == "":
        negative_prompt = None    
    if selected_index is None:
        raise gr.Error("You must select a LoRA before proceeding.")

    selected_lora = loras[selected_index]
    lora_path = selected_lora["repo"]
    trigger_word = selected_lora["trigger_word"]

    # Load LoRA weights
    with calculateDuration(f"Loading LoRA weights for {selected_lora['title']}"):
        if "weights" in selected_lora:
            pipe.load_lora_weights(lora_path, weight_name=selected_lora["weights"])
        else:
            pipe.load_lora_weights(lora_path)
        
    # Set random seed for reproducibility
    with calculateDuration("Randomizing seed"):
        if randomize_seed:
            seed = random.randint(0, MAX_SEED)
    
    image = generate_image(prompt, trigger_word, steps, seed, cfg_scale, width, height, negative_prompt, lora_scale, progress)
    pipe.to("cpu")
    pipe.unload_lora_weights()
    return image, seed  

run_lora.zerogpu = True

css = '''
#gen_btn{height: 100%}
#title{text-align: center}
#title h1{font-size: 3em; display:inline-flex; align-items:center}
#title img{width: 100px; margin-right: 0.5em}
#gallery .grid-wrap{height: 10vh}
'''
with gr.Blocks(theme=gr.themes.Soft(), css=css) as app:
    title = gr.HTML(
        """<h1><img src="https://huggingface.co/AlekseyCalvin/HSTklimbimOPENfluxLora/resolve/main/acs62iv.png" alt="LoRA">OpenFlux LoRAsoon®</h1>""",
        elem_id="title",
    )
    	    # Info blob stating what the app is running
    info_blob = gr.HTML(
        """<div id="info_blob"> SOON®'s curated LoRa Gallery & Art Manufactory Space.|Runs on Ostris' OpenFLUX.1 model + fast-gen LoRA & Zer0int's fine-tuned CLIP-GmP-ViT-L-14*! (*'normal' 77 tokens)| Largely stocked w/our trained LoRAs: Historic Color, Silver Age Poets, Sots Art, more!|</div>"""
    )
        # Info blob stating what the app is running
    info_blob = gr.HTML(
        """<div id="info_blob"> *Auto-planting of prompts with a choice LoRA trigger errors out in this space over flaws yet unclear. In its stead, we pose numbered LoRA-box rows & a matched token cheat-sheet: ungainly & free. So, prephrase your prompts w/: 1-2. HST style autochrome |3. RCA style Communist poster |4. SOTS art |5. HST Austin Osman Spare style |6. Vladimir Mayakovsky |7-8. Marina Tsvetaeva Tsvetaeva_02.CR2 |9. Anna Akhmatova |10. Osip Mandelshtam |11-12. Alexander Blok |13. Blok_02.CR2 |14. LEN Lenin |15. Leon Trotsky |16. Rosa Fluxemburg |17. HST Peterhof photo |18-19. HST |20. HST portrait |21. HST |22. HST 80s Perestroika-era Soviet photo |23-30. HST |31. How2Draw a__ |32. propaganda poster |33. TOK hybrid photo of__ with cartoon of__ |34. 2004 IMG_1099.CR2 photo |35. unexpected photo of |36. flmft |37. 80s yearbook photo |38. TOK portra |39. pficonics |40. retrofuturism |41. wh3r3sw4ld0 |42. amateur photo |43. crisp |44-45. IMG_1099.CR2 |46. FilmFotos |47. ff-collage |48. HST |49-50. AOS |51. cover </div>"""
    )
    selected_index = gr.State(None)
    with gr.Row():
        with gr.Column(scale=3):
            prompt = gr.Textbox(label="Prompt", lines=1, placeholder="Select LoRa/Style & type prompt!")
    with gr.Row():
        with gr.Column(scale=3):
            negative_prompt = gr.Textbox(label="Negative Prompt", lines=1, placeholder="List unwanted conditions, open-fluxedly!")
        with gr.Column(scale=1, elem_id="gen_column"):
            generate_button = gr.Button("Generate", variant="primary", elem_id="gen_btn")
    with gr.Row():
        with gr.Column(scale=3):
            selected_info = gr.Markdown("")
            gallery = gr.Gallery(
                [(item["image"], item["title"]) for item in loras],
                label="LoRA Inventory",
                allow_preview=False,
                columns=3,
                elem_id="gallery"
            )
            
        with gr.Column(scale=4):
            result = gr.Image(label="Generated Image")

    with gr.Row():
        with gr.Accordion("Advanced Settings", open=True):
            with gr.Column():
                with gr.Row():
                    cfg_scale = gr.Slider(label="CFG Scale", minimum=1, maximum=20, step=1, value=3)
                    steps = gr.Slider(label="Steps", minimum=1, maximum=50, step=1, value=6)
                
                with gr.Row():
                    width = gr.Slider(label="Width", minimum=256, maximum=1536, step=64, value=768)
                    height = gr.Slider(label="Height", minimum=256, maximum=1536, step=64, value=768)
                
                with gr.Row():
                    randomize_seed = gr.Checkbox(True, label="Randomize seed")
                    seed = gr.Slider(label="Seed", minimum=0, maximum=MAX_SEED, step=1, value=0, randomize=True)
                    lora_scale = gr.Slider(label="LoRA Scale", minimum=0, maximum=1, step=0.01, value=0.95)

    gallery.select(
        update_selection,
        inputs=[width, height],
        outputs=[prompt, selected_info, selected_index, width, height]
    )

    gr.on(
        triggers=[generate_button.click, prompt.submit],
        fn=run_lora,
        inputs=[prompt, cfg_scale, steps, selected_index, randomize_seed, seed, width, height, negative_prompt, lora_scale],
        outputs=[result, seed]
    )

warnings.filterwarnings("ignore", category=FutureWarning)
app.queue(default_concurrency_limit=2).launch(show_error=True)
app.launch()