import logging
import os
import sys

import gradio as gr
import uvicorn
from fastapi import FastAPI
from fastapi.responses import FileResponse
from fastapi.staticfiles import StaticFiles
from fastapi.templating import Jinja2Templates
from spaces import GPU as SPACES_GPU

from lisa_on_cuda import routes
from lisa_on_cuda.utils import app_helpers, session_logger, utils
from lisa_on_cuda.utils import frontend_builder


LOGLEVEL = os.getenv('LOGLEVEL', 'INFO').upper()
session_logger.change_logging(LOGLEVEL)

CUSTOM_GRADIO_PATH = "/"
CUSTOM_STATIC_PATH = "/static"
FASTAPI_TITLE = "lisa_app"
app = FastAPI(title=FASTAPI_TITLE, version="1.0")
app.include_router(routes.router)


frontend_builder.build_frontend(
    project_root_folder=frontend_builder.env_project_root_folder,
    input_css_path=frontend_builder.env_input_css_path,
    output_dist_folder=utils.FASTAPI_STATIC / "dist"
)

logging.info("build_frontend ok!")

os.makedirs(utils.FASTAPI_STATIC, exist_ok=True)
app.mount(CUSTOM_STATIC_PATH, StaticFiles(directory=utils.FASTAPI_STATIC / "dist"), name="static")


@app.get(CUSTOM_STATIC_PATH)
async def static() -> FileResponse:
    return FileResponse(path=str(utils.FASTAPI_STATIC / "dist" / "index.html"), media_type="text/html")


templates = Jinja2Templates(directory="templates")


app_helpers.app_logger.info(f"sys.argv:{sys.argv}.")
args = app_helpers.parse_args([])
app_helpers.app_logger.info(f"prepared default arguments:{args}.")
inference_fn = app_helpers.get_inference_model_by_args(args, inference_decorator=SPACES_GPU)
app_helpers.app_logger.info(f"prepared inference_fn function:{inference_fn.__name__}, creating gradio interface...")
io = app_helpers.get_gradio_interface(inference_fn)
app_helpers.app_logger.info("created gradio interface")
app = gr.mount_gradio_app(app, io, path=CUSTOM_GRADIO_PATH)
app_helpers.app_logger.info("mounted gradio app within fastapi")


if __name__ == '__main__':
    try:
        uvicorn.run(app, host="0.0.0.0", port=7860)
    except Exception as ex:
        logging.error(f"fastapi/gradio application {FASTAPI_TITLE} exception:{ex}.")
        raise ex