from typing import Any, Dict, List, Optional

import httpx

from app.core.settings import settings


class FakerApiClient:
    def __init__(
        self,
        base_url: Optional[str] = None,
        locale: Optional[str] = None,
        seed: Optional[int] = None,
    ):
        self.base_url = (base_url or settings.fakerapi_base_url).rstrip("/")
        self.locale = locale or settings.fakerapi_locale
        self.seed = settings.fakerapi_seed if seed is None else seed

    async def fetch_resource(
        self,
        resource: str,
        quantity: int,
        extra_params: Optional[Dict[str, Any]] = None,
    ) -> List[Dict[str, Any]]:
        url = f"{self.base_url}/{resource.lstrip('/')}"
        params: Dict[str, Any] = {
            "_quantity": quantity,
            "_locale": self.locale,
            "_seed": self.seed,
        }
        if extra_params:
            params.update(extra_params)

        timeout = httpx.Timeout(connect=5.0, read=15.0, write=10.0, pool=5.0)
        headers = {
            "Accept": "application/json",
            "User-Agent": "orquestrador-fakerapi-client/1.0",
        }
        async with httpx.AsyncClient(timeout=timeout, headers=headers) as client:
            try:
                response = await client.get(url, params=params)
                response.raise_for_status()
                payload = response.json()
            except httpx.ReadTimeout:
                # Retry once with smaller payload to reduce timeout risk in free/public APIs.
                reduced_quantity = min(quantity, 20)
                retry_params = dict(params)
                retry_params["_quantity"] = reduced_quantity
                response = await client.get(url, params=retry_params)
                response.raise_for_status()
                payload = response.json()

        if isinstance(payload, dict) and isinstance(payload.get("data"), list):
            return payload["data"]
        if isinstance(payload, list):
            return payload
        return []