"""
Flask application entrypoint.

At this stage of the build (Layer 1), only the database and authentication
are wired up so this layer can be tested in isolation. Chat/RAG/agent
routes will be added in later layers.
"""
# http://127.0.0.1:7860/


import os
import threading

# Some corporate proxies / VPNs set HTTP_PROXY / HTTPS_PROXY, which makes
# Gradio's internal "is localhost reachable" check fail even for 127.0.0.1.
os.environ["NO_PROXY"] = "127.0.0.1,localhost," + os.environ.get("NO_PROXY", "")
os.environ["no_proxy"] = os.environ["NO_PROXY"]

# --- Workaround for a gradio_client bug (gradio 4.44.1 + newer pydantic) ---
# When a schema (or a nested value like `additionalProperties`) is a plain
# bool (True/False) rather than a dict, gradio_client's schema walker either
# crashes with "TypeError: argument of type 'bool' is not iterable" or raises
# "APIInfoParseError: Cannot parse schema True". This happens while Gradio
# builds the page's embedded API info, unconditionally, on every request to
# "/" - so it can't be avoided via show_api=False. Patch both entry points.
import gradio_client.utils as _gc_utils

_orig_get_type = _gc_utils.get_type
_orig_json_schema_to_python_type = _gc_utils._json_schema_to_python_type

import spaces

@spaces.GPU(duration=1)
def _warmup():
    return True

# _warmup()

def _safe_get_type(schema):
    if isinstance(schema, bool):
        return "Any"
    return _orig_get_type(schema)


def _safe_json_schema_to_python_type(schema, defs=None):
    if isinstance(schema, bool):
        return "Any"
    return _orig_json_schema_to_python_type(schema, defs)


_gc_utils.get_type = _safe_get_type
_gc_utils._json_schema_to_python_type = _safe_json_schema_to_python_type
# --- end workaround ---

from flask import Flask

import config
from auth.db import init_db
from auth.routes import auth_bp
from chat_routes import chat_bp
from ui.layout import build_ui


def create_app():
    app = Flask(__name__)

    app.config["SECRET_KEY"] = config.SECRET_KEY
    app.config["SQLALCHEMY_DATABASE_URI"] = config.SQLALCHEMY_DATABASE_URI
    app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = config.SQLALCHEMY_TRACK_MODIFICATIONS

    init_db(app)

    app.register_blueprint(auth_bp)
    app.register_blueprint(chat_bp)

    @app.route("/health")
    def health():
        return {"status": "ok"}

    return app


if __name__ == "__main__":
    flask_app = create_app()

    # Run the Flask REST API (auth + chat endpoints) on a background thread.
    api_thread = threading.Thread(
        target=lambda: flask_app.run(port=5000, debug=False, use_reloader=False),
        daemon=True,
    )
    api_thread.start()

    # Gradio UI is the main process. Its callbacks call into Flask
    # in-process via app_context() (see ui/callbacks.py) rather than HTTP.
    demo = build_ui(flask_app)
    demo.queue().launch(
        server_name="0.0.0.0",
        server_port=7860,
        show_api=False,
        inbrowser=False,
    )