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from pathlib import Path
from fastapi import FastAPI
from fastapi.staticfiles import StaticFiles
from fastapi import File, UploadFile

import uvicorn
import gradio as gr
from datetime import datetime
import sys


# create a FastAPI app
app = FastAPI()

# create a static directory to store the static files
static_dir = Path('./static')
static_dir.mkdir(parents=True, exist_ok=True)

# mount FastAPI StaticFiles server
app.mount("/static", StaticFiles(directory=static_dir), name="static")
app.mount("/public", StaticFiles(directory=static_dir), name="static")

@app.post("/upload")
def upload(file: UploadFile = File(...)):
    try:
        file_name = f"{datetime.utcnow().strftime('%s')}.html"
        file_path = static_dir / file_name
        print(file_path)
        with open(file_path, 'wb') as f:
            while contents := file.file.read(1024 * 1024):
                f.write(contents)
    except Exception:
        return {"message": "There was an error uploading the file"}
    finally:
        file.file.close()

    return {"message": f"Successfully uploaded {file_path}", "url": f"https://fairedge-static-page.hf.space/{file_path}"}


def predict(text_input):
    file_name = f"{datetime.utcnow().strftime('%s')}.html"
    file_path = static_dir / file_name
    print(file_path)
    with open(file_path, "w") as f:
        f.write(f"""
        <script src="https://cdn.tailwindcss.com"></script>
        <body class="bg-gray-200 dark:text-white dark:bg-gray-900">
        <h1 class="text-3xl font-bold">
        Hello <i>{text_input}</i> From Gradio Iframe
        </h1>
        <h3>Filename: {file_name}</h3>
        """)
    iframe = f"""<iframe src="/static/{file_name}" width="100%" height="500px"></iframe>"""
    link = f'<a href="/static/{file_name}" target="_blank">{file_name}</a>'
    return link, iframe


with gr.Blocks() as block:
    gr.Markdown("""
## Gradio + FastAPI + Static Server
This is a demo of how to use Gradio with FastAPI and a static server.
The Gradio app generates dynamic HTML files and stores them in a static directory. FastAPI serves the static files.
""")
    with gr.Row():
        with gr.Column():
            text_input = gr.Textbox(label="Name")
            markdown = gr.Markdown(label="Output Box")
            new_btn = gr.Button("New")
        with gr.Column():
            html = gr.HTML(label="HTML preview", show_label=True)

    new_btn.click(fn=predict, inputs=[text_input], outputs=[markdown, html])


# mount Gradio app to FastAPI app
app = gr.mount_gradio_app(app, block, path="/")

# serve the app
if __name__ == "__main__":
    uvicorn.run(app, host="0.0.0.0", port=7860)

# run the app with
# python app.py
# or
# uvicorn "app:app" --host "0.0.0.0" --port 7860 --reload