"""Admin blueprint - user management."""
from flask import Blueprint, flash, jsonify, redirect, render_template, request, session, url_for
from flask_babel import gettext as _

from blueprints.auth import login_required
from services.api_client import api_client

admin_bp = Blueprint("admin", __name__, url_prefix="/admin")


def admin_required(f):
    """Decorator to require admin privileges."""
    from functools import wraps
    @wraps(f)
    def decorated(*args, **kwargs):
        user = session.get("user", {})
        if not user.get("is_admin"):
            flash(_("Accesso non autorizzato"), "error")
            return redirect(url_for("measure.select_recipe"))
        return f(*args, **kwargs)
    return decorated


# ============================================================================
# PAGINE (GET)
# ============================================================================

@admin_bp.route("/users")
@login_required
@admin_required
def user_list():
    """User management page."""
    resp = api_client.get("/api/users")

    if isinstance(resp, dict) and resp.get("error"):
        flash(_("Errore nel caricamento degli utenti: %(error)s", error=resp.get("detail", "")), "error")
        users = []
    elif isinstance(resp, list):
        users = resp
    else:
        users = []

    return render_template("admin/users.html", users=users)


@admin_bp.route("/settings")
@login_required
@admin_required
def settings_page():
    """System settings page."""
    resp = api_client.get("/api/settings")
    settings = resp if not isinstance(resp, dict) or not resp.get("error") else {}
    return render_template("admin/settings.html", settings=settings)


@admin_bp.route("/api/settings", methods=["PUT"])
@login_required
@admin_required
def api_update_settings():
    """Proxy: Update system settings."""
    data = request.get_json(silent=True) or {}
    resp = api_client.put("/api/settings", data=data)
    if isinstance(resp, dict) and resp.get("error"):
        return jsonify(resp), resp.get("status_code", 500)
    return jsonify(resp), 200


@admin_bp.route("/stations")
@login_required
@admin_required
def station_list():
    """Station management page."""
    resp = api_client.get("/api/stations")
    if isinstance(resp, dict) and resp.get("error"):
        flash(_("Errore nel caricamento delle stazioni: %(error)s", error=resp.get("detail", "")), "error")
        stations = []
    elif isinstance(resp, list):
        stations = resp
    else:
        stations = []

    recipes_resp = api_client.get("/api/recipes")
    if isinstance(recipes_resp, list):
        all_recipes = recipes_resp
    elif isinstance(recipes_resp, dict) and isinstance(recipes_resp.get("items"), list):
        all_recipes = recipes_resp["items"]
    else:
        all_recipes = []

    return render_template("admin/stations.html", stations=stations, all_recipes=all_recipes)


# ============================================================================
# API PROXY AJAX (JSON)
# ============================================================================

@admin_bp.route("/api/users", methods=["POST"])
@login_required
@admin_required
def api_create_user():
    """Proxy: Create new user."""
    data = request.get_json(silent=True) or {}
    resp = api_client.post("/api/users", data=data)

    if isinstance(resp, dict) and resp.get("error"):
        return jsonify(resp), resp.get("status_code", 500)

    return jsonify(resp), 201


@admin_bp.route("/api/users/<int:user_id>", methods=["PUT"])
@login_required
@admin_required
def api_update_user(user_id: int):
    """Proxy: Update user."""
    data = request.get_json(silent=True) or {}
    resp = api_client.put(f"/api/users/{user_id}", data=data)

    if isinstance(resp, dict) and resp.get("error"):
        return jsonify(resp), resp.get("status_code", 500)

    return jsonify(resp), 200


@admin_bp.route("/api/users/<int:user_id>/password", methods=["PUT"])
@login_required
@admin_required
def api_change_password(user_id: int):
    """Proxy: Change user password."""
    data = request.get_json(silent=True) or {}
    resp = api_client.put(f"/api/users/{user_id}/password", data=data)

    if isinstance(resp, dict) and resp.get("error"):
        return jsonify(resp), resp.get("status_code", 500)

    return jsonify(resp), 200


@admin_bp.route("/api/users/<int:user_id>/toggle-active", methods=["POST"])
@login_required
@admin_required
def api_toggle_active(user_id: int):
    """Proxy: Toggle user active status."""
    data = request.get_json(silent=True) or {}
    active = data.get("active", True)
    resp = api_client.put(f"/api/users/{user_id}", data={"active": active})

    if isinstance(resp, dict) and resp.get("error"):
        return jsonify(resp), resp.get("status_code", 500)

    return jsonify(resp), 200


# --- Stations ---

@admin_bp.route("/api/stations", methods=["POST"])
@login_required
@admin_required
def api_create_station():
    """Proxy: Create a new station."""
    data = request.get_json(silent=True) or {}
    resp = api_client.post("/api/stations", data=data)
    if isinstance(resp, dict) and resp.get("error"):
        return jsonify(resp), resp.get("status_code", 500)
    return jsonify(resp), 201


@admin_bp.route("/api/stations/<int:station_id>", methods=["PUT"])
@login_required
@admin_required
def api_update_station(station_id: int):
    """Proxy: Update a station."""
    data = request.get_json(silent=True) or {}
    resp = api_client.put(f"/api/stations/{station_id}", data=data)
    if isinstance(resp, dict) and resp.get("error"):
        return jsonify(resp), resp.get("status_code", 500)
    return jsonify(resp), 200


@admin_bp.route("/api/stations/<int:station_id>", methods=["DELETE"])
@login_required
@admin_required
def api_delete_station(station_id: int):
    """Proxy: Delete a station."""
    resp = api_client.delete(f"/api/stations/{station_id}")
    if isinstance(resp, dict) and resp.get("error"):
        return jsonify(resp), resp.get("status_code", 500)
    return jsonify({"deleted": True}), 200


@admin_bp.route("/api/stations/<int:station_id>/recipes", methods=["GET"])
@login_required
@admin_required
def api_list_station_recipes(station_id: int):
    """Proxy: List recipes assigned to a station."""
    resp = api_client.get(f"/api/stations/{station_id}/recipes")
    if isinstance(resp, dict) and resp.get("error"):
        return jsonify(resp), resp.get("status_code", 500)
    return jsonify(resp), 200


@admin_bp.route("/api/stations/<int:station_id>/recipes", methods=["POST"])
@login_required
@admin_required
def api_assign_recipe(station_id: int):
    """Proxy: Assign a recipe to a station."""
    data = request.get_json(silent=True) or {}
    resp = api_client.post(f"/api/stations/{station_id}/recipes", data=data)
    if isinstance(resp, dict) and resp.get("error"):
        return jsonify(resp), resp.get("status_code", 500)
    return jsonify(resp), 201


@admin_bp.route("/api/stations/<int:station_id>/recipes/<int:recipe_id>", methods=["DELETE"])
@login_required
@admin_required
def api_unassign_recipe(station_id: int, recipe_id: int):
    """Proxy: Remove a recipe assignment from a station."""
    resp = api_client.delete(f"/api/stations/{station_id}/recipes/{recipe_id}")
    if isinstance(resp, dict) and resp.get("error"):
        return jsonify(resp), resp.get("status_code", 500)
    return jsonify({"deleted": True}), 200
