import logging
import uuid

from aiohttp import web
from aiohttp.web import Request, Response

from app.library.encoder import Encoder
from app.library.Events import EventBus, Events
from app.library.Presets import Preset, Presets
from app.library.router import route
from app.library.Utils import init_class, validate_uuid

LOG: logging.Logger = logging.getLogger(__name__)


@route("GET", "api/presets/", "presets")
async def presets(request: Request, encoder: Encoder) -> Response:
    """
    Get the presets.

    Args:
        request (Request): The request object.
        encoder (Encoder): The encoder instance.

    Returns:
        Response: The response object.

    """
    data: list[Preset] = Presets.get_instance().get_all()
    filter_fields: str | None = request.query.get("filter", None)

    if filter_fields:
        fields: list[str] = [field.strip() for field in filter_fields.split(",")]
        data = [{key: value for key, value in preset.serialize().items() if key in fields} for preset in data]

    return web.json_response(data=data, status=web.HTTPOk.status_code, dumps=encoder.encode)


@route("PUT", "api/presets/", "presets_add")
async def presets_add(request: Request, encoder: Encoder, notify: EventBus) -> Response:
    """
    Add presets.

    Args:
        request (Request): The request object.
        encoder (Encoder): The encoder instance.
        notify (EventBus): The event bus instance.

    Returns:
        Response: The response object

    """
    data = await request.json()

    if not isinstance(data, list):
        return web.json_response(
            {"error": "Invalid request body expecting list with dicts."},
            status=web.HTTPBadRequest.status_code,
        )

    presets: list = []

    cls = Presets.get_instance()

    for item in data:
        if not isinstance(item, dict):
            return web.json_response(
                {"error": "Invalid request body expecting list with dicts."},
                status=web.HTTPBadRequest.status_code,
            )

        if not item.get("name"):
            return web.json_response(
                {"error": "name is required.", "data": item}, status=web.HTTPBadRequest.status_code
            )

        if not item.get("id", None) or not validate_uuid(item.get("id"), version=4):
            item["id"] = str(uuid.uuid4())

        try:
            cls.validate(item)
        except ValueError as e:
            return web.json_response(
                {"error": f"Failed to validate preset '{item.get('name')}'. '{e!s}'"},
                status=web.HTTPBadRequest.status_code,
            )

        presets.append(init_class(Preset, item))

    try:
        presets = cls.save(items=presets).load().get_all()
    except Exception as e:
        LOG.exception(e)
        return web.json_response(
            {"error": "Failed to save presets.", "message": str(e)},
            status=web.HTTPInternalServerError.status_code,
        )

    await notify.emit(Events.PRESETS_UPDATE, data=presets)
    return web.json_response(data=presets, status=web.HTTPOk.status_code, dumps=encoder.encode)