import os
import time
import signal
import re
import warnings
from fastapi.middleware.cors import CORSMiddleware
from fastapi.middleware.gzip import GZipMiddleware
from setup import log

import logging
logging.getLogger("xformers").addFilter(lambda record: 'A matching Triton is not available' not in record.getMessage())
from modules import paths, timer, errors

startup_timer = timer.Timer()

import torch
import torchvision
import pytorch_lightning # pytorch_lightning should be imported after torch, but it re-enables warnings on import so import once to disable them
warnings.filterwarnings(action="ignore", category=DeprecationWarning, module="pytorch_lightning")
warnings.filterwarnings(action="ignore", category=UserWarning, module="torchvision")
startup_timer.record("torch")

from modules import import_hook
import gradio
import ldm.modules.encoders.modules

from modules import extra_networks, ui_extra_networks_checkpoints
from modules import extra_networks_hypernet, ui_extra_networks_hypernets, ui_extra_networks_textual_inversion
from modules.call_queue import wrap_queued_call, queue_lock, wrap_gradio_gpu_call

# Truncate version number of nightly/local build of PyTorch to not cause exceptions with CodeFormer or Safetensors
if ".dev" in torch.__version__ or "+git" in torch.__version__:
    torch.__long_version__ = torch.__version__
    torch.__version__ = re.search(r'[\d.]+[\d]', torch.__version__).group(0)

from modules import shared, devices, sd_samplers, upscaler, extensions, ui_tempdir, ui_extra_networks
import modules.codeformer_model as codeformer
import modules.face_restoration
import modules.gfpgan_model as gfpgan
import modules.img2img
import modules.lowvram
import modules.scripts
import modules.sd_hijack
import modules.sd_models
import modules.sd_vae
import modules.txt2img
import modules.script_callbacks
import modules.textual_inversion.textual_inversion
import modules.progress
import modules.ui
from modules import modelloader
from modules.shared import cmd_opts, opts
import modules.hypernetworks.hypernetwork

startup_timer.record("libraries")

if cmd_opts.server_name:
    server_name = cmd_opts.server_name
else:
    server_name = "0.0.0.0" if cmd_opts.listen else None


def initialize():
    extensions.list_extensions()
    startup_timer.record("extensions")

    modelloader.cleanup_models()
    modules.sd_models.setup_model()
    startup_timer.record("models")

    codeformer.setup_model(opts.codeformer_models_path)
    startup_timer.record("codeformer")

    gfpgan.setup_model(opts.gfpgan_models_path)
    startup_timer.record("gfpgan")

    modelloader.list_builtin_upscalers()
    startup_timer.record("upscalers")

    modules.scripts.load_scripts()
    startup_timer.record("scripts")

    modelloader.load_upscalers()
    startup_timer.record("upscalers")

    modules.sd_vae.refresh_vae_list()
    startup_timer.record("vae")

    modules.textual_inversion.textual_inversion.list_textual_inversion_templates()
    startup_timer.record("embeddings")

    shared.opts.onchange("sd_vae", wrap_queued_call(lambda: modules.sd_vae.reload_vae_weights()), call=False)
    shared.opts.onchange("sd_vae_as_default", wrap_queued_call(lambda: modules.sd_vae.reload_vae_weights()), call=False)
    shared.opts.onchange("temp_dir", ui_tempdir.on_tmpdir_changed)
    startup_timer.record("opts onchange")

    shared.reload_hypernetworks()
    startup_timer.record("hypernets")

    ui_extra_networks.intialize()
    ui_extra_networks.register_page(ui_extra_networks_textual_inversion.ExtraNetworksPageTextualInversion())
    ui_extra_networks.register_page(ui_extra_networks_hypernets.ExtraNetworksPageHypernetworks())
    ui_extra_networks.register_page(ui_extra_networks_checkpoints.ExtraNetworksPageCheckpoints())
    extra_networks.initialize()
    extra_networks.register_extra_network(extra_networks_hypernet.ExtraNetworkHypernet())
    startup_timer.record("extra networks")

    if cmd_opts.tls_keyfile is not None and cmd_opts.tls_keyfile is not None:
        try:
            if not os.path.exists(cmd_opts.tls_keyfile):
                log.warning("Invalid path to TLS keyfile given")
            if not os.path.exists(cmd_opts.tls_certfile):
                log.warning(f"Invalid path to TLS certfile: '{cmd_opts.tls_certfile}'")
        except TypeError:
            cmd_opts.tls_keyfile = cmd_opts.tls_certfile = None
            log.warning("TLS setup invalid, running webui without TLS")
        else:
            log.info("Running with TLS")
        startup_timer.record("TLS")

    # make the program just exit at ctrl+c without waiting for anything
    def sigint_handler(_sig, _frame):
        log.info('Exiting')
        os._exit(0)

    signal.signal(signal.SIGINT, sigint_handler)


def load_model():
    shared.state.begin()
    shared.state.job = 'load model'
    try:
        modules.sd_models.load_model()
    except Exception as e:
        errors.display(e, "loading stable diffusion model")
        log.error(f"Stable diffusion model failed to load")
        exit(1)
    if shared.sd_model is None:
        log.error("No stable diffusion model loaded")
        exit(1)
    shared.opts.data["sd_model_checkpoint"] = shared.sd_model.sd_checkpoint_info.title
    shared.opts.onchange("sd_model_checkpoint", wrap_queued_call(lambda: modules.sd_models.reload_model_weights()))
    shared.state.end()
    startup_timer.record("checkpoint")


def setup_middleware(app):
    app.middleware_stack = None # reset current middleware to allow modifying user provided list
    app.add_middleware(GZipMiddleware, minimum_size=1024)
    if cmd_opts.cors_origins and cmd_opts.cors_regex:
        app.add_middleware(CORSMiddleware, allow_origins=cmd_opts.cors_origins.split(','), allow_origin_regex=cmd_opts.cors_regex, allow_methods=['*'], allow_credentials=True, allow_headers=['*'])
    elif cmd_opts.cors_origins:
        app.add_middleware(CORSMiddleware, allow_origins=cmd_opts.cors_origins.split(','), allow_methods=['*'], allow_credentials=True, allow_headers=['*'])
    elif cmd_opts.cors_regex:
        app.add_middleware(CORSMiddleware, allow_origin_regex=cmd_opts.cors_regex, allow_methods=['*'], allow_credentials=True, allow_headers=['*'])
    app.build_middleware_stack() # rebuild middleware stack on-the-fly


def create_api(app):
    from modules.api.api import Api
    api = Api(app, queue_lock)
    return api


def webui():
    initialize()
    if shared.opts.clean_temp_dir_at_start:
        ui_tempdir.cleanup_tmpdr()
        startup_timer.record("cleanup")
    modules.script_callbacks.before_ui_callback()
    startup_timer.record("scripts before_ui_callback")
    shared.demo = modules.ui.create_ui()
    startup_timer.record("ui")
    shared.demo.queue(16)

    gradio_auth_creds = []
    if cmd_opts.gradio_auth:
        gradio_auth_creds += [x.strip() for x in cmd_opts.gradio_auth.strip('"').replace('\n', '').split(',') if x.strip()]
    if cmd_opts.gradio_auth_path:
        with open(cmd_opts.gradio_auth_path, 'r', encoding="utf8") as file:
            for line in file.readlines():
                gradio_auth_creds += [x.strip() for x in line.split(',') if x.strip()]

    app, _local_url, _share_url = shared.demo.launch(
        share=cmd_opts.share,
        server_name=server_name,
        server_port=cmd_opts.port,
        ssl_keyfile=cmd_opts.tls_keyfile,
        ssl_certfile=cmd_opts.tls_certfile,
        debug=False,
        auth=[tuple(cred.split(':')) for cred in gradio_auth_creds] if gradio_auth_creds else None,
        inbrowser=cmd_opts.autolaunch,
        prevent_thread_lock=True,
        favicon_path='automatic.ico',
    )
    # for dep in shared.demo.dependencies:
    #    dep['show_progress'] = False  # disable gradio css animation on component update
    # app is instance of FastAPI server
    # shared.demo.server is instance of gradio class which inherits from uvicorn.Server
    # shared.demo.config is instance of uvicorn.Config
    # shared.demo.app is instance of ASGIApp

    cmd_opts.autolaunch = False
    startup_timer.record("gradio")

    app.user_middleware = [x for x in app.user_middleware if x.cls.__name__ != 'CORSMiddleware']
    setup_middleware(app)

    modules.progress.setup_progress_api(app)
    create_api(app)

    ui_extra_networks.add_pages_to_demo(app)

    modules.script_callbacks.app_started_callback(shared.demo, app)
    startup_timer.record("scripts app_started_callback")

    load_model()

    log.info(f"Startup time: {startup_timer.summary()}")

    while True:
        time.sleep(0.1)


if __name__ == "__main__":
    webui()