"""FC-3a: plural /api/artists endpoints — POST (find-or-create) +
autocomplete. The slug-routed singular /api/artist/<slug> blueprint
stays separate and unmodified."""

from quart import Blueprint, jsonify, request

from ..extensions import get_session
from ..services.artist_service import ArtistService

artists_bp = Blueprint("artists", __name__, url_prefix="/api/artists")


@artists_bp.route("", methods=["POST"])
async def create_or_get():
    body = await request.get_json()
    if not isinstance(body, dict):
        return jsonify({"error": "invalid_body"}), 400
    name = body.get("name", "")
    async with get_session() as session:
        svc = ArtistService(session)
        try:
            artist, created = await svc.find_or_create(name)
        except ValueError as exc:
            return jsonify({"error": "empty_name", "detail": str(exc)}), 400
    return jsonify({
        "id": artist.id, "name": artist.name, "slug": artist.slug,
        "created": created,
    }), 201


@artists_bp.route("/autocomplete", methods=["GET"])
async def autocomplete():
    q = request.args.get("q") or ""
    try:
        limit = int(request.args.get("limit", "20"))
    except ValueError:
        return jsonify({"error": "invalid_limit"}), 400
    if limit < 1 or limit > 100:
        return jsonify({"error": "invalid_limit"}), 400
    async with get_session() as session:
        rows = await ArtistService(session).autocomplete(q, limit=limit)
    return jsonify([
        {"id": a.id, "name": a.name, "slug": a.slug} for a in rows
    ])