"""Сборка FastAPI-приложения мок-контрол-плейна (контракт ``docs/openapi.yaml``)."""

from __future__ import annotations

import os
from typing import Any

from fastapi import FastAPI

from awg_api import __version__
from awg_api.contract import load_spec
from awg_api.errors import install_error_handlers
from awg_api.routers import auth, config, devices, ops, routing, status
from awg_api.state import DEV_TOKEN, MockState
from awg_api.ws import metrics

TOKEN_ENV_VAR = "AWG_API_TOKEN"  # noqa: S105 — имя переменной окружения, не секрет


class ContractFastAPI(FastAPI):
    """FastAPI, отдающий ``/openapi.json`` из контрактной спецификации, не из кода."""

    def openapi(self) -> dict[str, Any]:
        return load_spec()


def create_app(state: MockState | None = None, token: str | None = None) -> FastAPI:
    """Создаёт приложение мок-сервера; ``state``/``token`` подменяются в тестах."""
    resolved_token = token or os.environ.get(TOKEN_ENV_VAR) or DEV_TOKEN
    mock_state = state if state is not None else MockState()
    mock_state.token = resolved_token
    app = ContractFastAPI(
        title="awg-dash API",
        version=__version__,
        description="Мок-контрол-плейн по контракту docs/openapi.yaml (задача #19)",
    )
    app.state.mock_state = mock_state
    app.state.api_token = resolved_token
    install_error_handlers(app)
    app.include_router(ops.router)
    app.include_router(auth.router)
    app.include_router(status.router)
    app.include_router(config.router)
    app.include_router(routing.router)
    app.include_router(devices.router)
    app.include_router(metrics.router)
    return app