from __future__ import annotations

from fastapi import APIRouter, Request
from fastapi.responses import JSONResponse

from vocero_api.api.responses import validated_json_response
from vocero_api.core import config as settings
from vocero_api.core import logging as app_logging
from vocero_api.core import urls as core_urls
from vocero_api.models.responses import ConfigResponse

router = APIRouter()


def _effective_s2s_url(request: Request) -> str:
    return settings.SPEECH_TO_SPEECH_URL or core_urls._proxy_public_url(request)


@router.get("/api/config", response_model=ConfigResponse)
async def config(request: Request) -> JSONResponse:
    """Client bootstrap: whether web search is available, whether the deploy runs
    behind a load balancer (so the browser uses the /api/session proxy),
    and whether the user may instead set a direct
    s2s server URL. The LB address itself is intentionally NOT included.

    2026-09-24: new top-level `apipilot` flag. When True the deploy exposes the
    new `/api/apipilot/tools` and `/api/apipilot/execute` proxy endpoints (see
    docs/client/tool-calling.md) that the browser may call directly instead of
    hardcoding upstream tool URLs / names."""
    app_logging.logger.debug(
        "[INTERNAL] /api/config requested client=%s", request.client.host if request.client else "?"
    )
    primary_prompt = settings.S2S_PRIMARY_PROMPT
    out = {
        "search": bool(settings.SERPER_KEY),
        "lb": bool(settings.LOAD_BALANCER_URL),
        "allowDirect": not settings.LOAD_BALANCER_URL,
        "s2sUrl": _effective_s2s_url(request),
        "primaryPrompt": primary_prompt,
        "reasoningType": settings.S2S_REASONING_TYPE,
        "injectProfile": settings.S2S_INJECT_PROFILE,
        "debugPrompt": settings.S2S_DEBUG_PROMPT,
        "startSessionMode": settings.S2S_START_SESSION_MODE,
        "theme": settings.S2S_THEME,
        "apipilot": bool(settings.S2S_APIPILOT_TOOLS_URL),
    }
    app_logging.logger.debug(
        "[INTERNAL] /api/config returned promptLen=%d reasoning=%s startSessionMode=%s theme=%s apipilot=%s",
        len(primary_prompt),
        settings.S2S_REASONING_TYPE,
        settings.S2S_START_SESSION_MODE or "-",
        settings.S2S_THEME or "-",
        out["apipilot"],
    )
    return validated_json_response(out, ConfigResponse)