from quart import Blueprint, jsonify, request

from fabledassistant.auth import login_required, get_current_user_id
from fabledassistant.config import Config
from fabledassistant.services.caldav import CALDAV_SETTING_KEYS, get_caldav_config, test_connection
from fabledassistant.services.llm import get_installed_models, _is_private_url
from fabledassistant.services.settings import delete_setting, get_all_settings, set_settings_batch

settings_bp = Blueprint("settings", __name__, url_prefix="/api/settings")


@settings_bp.route("", methods=["GET"])
@login_required
async def get_settings_route():
    uid = get_current_user_id()
    settings = await get_all_settings(uid)
    return jsonify(settings)


@settings_bp.route("", methods=["PUT"])
@login_required
async def update_settings_route():
    uid = get_current_user_id()
    data = await request.get_json()
    if not isinstance(data, dict):
        return jsonify({"error": "Expected a JSON object"}), 400

    if "default_model" in data:
        installed = await get_installed_models()
        if data["default_model"]:
            model = str(data["default_model"])
            if installed and model not in installed:
                return jsonify({"error": f"Model '{model}' is not installed"}), 400

    # Empty string for default_model means "reset to system default".
    # Delete the DB row so get_setting() falls back to Config defaults
    # rather than returning "" and breaking model resolution everywhere.
    _MODEL_KEYS = frozenset({"default_model"})
    to_save = {}
    for k, v in data.items():
        str_v = str(v)
        if k in _MODEL_KEYS and not str_v:
            await delete_setting(uid, k)
        else:
            to_save[k] = str_v

    if to_save:
        await set_settings_batch(uid, to_save)
    settings = await get_all_settings(uid)
    return jsonify(settings)


@settings_bp.route("/models", methods=["GET"])
@login_required
async def get_models_route():
    """Return installed Ollama models and the configured defaults."""
    models = sorted(await get_installed_models())
    return jsonify({
        "models": models,
        "default_chat_model": Config.OLLAMA_MODEL,
    })


@settings_bp.route("/caldav", methods=["GET"])
@login_required
async def get_caldav():
    uid = get_current_user_id()
    config = await get_caldav_config(uid)
    if config.get("caldav_password"):
        config["caldav_password"] = "********"
    return jsonify(config)


@settings_bp.route("/caldav", methods=["PUT"])
@login_required
async def update_caldav():
    uid = get_current_user_id()
    data = await request.get_json()

    # Validate CalDAV URL before saving — block internal/private addresses
    if "caldav_url" in data:
        url = str(data.get("caldav_url") or "").strip()
        if url:
            parsed_scheme = url.split("://")[0].lower() if "://" in url else ""
            if parsed_scheme not in ("http", "https"):
                return jsonify({"error": "CalDAV URL must use http or https"}), 400
            if _is_private_url(url):
                return jsonify({"error": "CalDAV URL must not point to an internal or private address"}), 400

    settings_to_save = {}
    for key in CALDAV_SETTING_KEYS:
        if key in data:
            if key == "caldav_password" and data[key] == "********":
                continue
            settings_to_save[key] = str(data[key])

    if settings_to_save:
        await set_settings_batch(uid, settings_to_save)
    return jsonify({"status": "ok"})


@settings_bp.route("/caldav/test", methods=["POST"])
@login_required
async def test_caldav():
    uid = get_current_user_id()
    result = await test_connection(uid)
    return jsonify(result)


@settings_bp.route("/search", methods=["GET"])
@login_required
async def test_search():
    """Test SearXNG connectivity and preview results for a query."""
    if not Config.searxng_enabled():
        return jsonify({"configured": False, "results": [], "searxng_url": ""})
    q = request.args.get("q", "").strip()
    if not q:
        return jsonify({"configured": True, "results": [], "searxng_url": Config.SEARXNG_URL})
    from fabledassistant.services.research import _search_searxng
    results = await _search_searxng(q)
    return jsonify({"configured": True, "results": results, "query": q, "searxng_url": Config.SEARXNG_URL})