"""Live monitor of the open production runs (#57).

Page at /monitor for admin and Supervisor (capoturno); the page polls a JSON proxy
of GET /api/production-runs/open every 10 seconds.
"""
from functools import wraps

from flask import Blueprint, abort, jsonify, render_template, session

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

monitor_bp = Blueprint("monitor", __name__)


def monitor_required(f):
    """Admin or Supervisor only: the same people the backend lets read /open."""
    @wraps(f)
    def decorated(*args, **kwargs):
        user = session.get("user", {})
        if not (user.get("is_admin") or "Supervisor" in user.get("roles", [])):
            abort(403)
        return f(*args, **kwargs)
    return decorated


@monitor_bp.route("", strict_slashes=False)
@login_required
@monitor_required
def index():
    return render_template("monitor/index.html")


@monitor_bp.route("/api/runs")
@login_required
@monitor_required
def api_runs():
    """JSON proxy polled by the page."""
    resp = api_client.get("/api/production-runs/open")
    if isinstance(resp, dict) and resp.get("error"):
        body = {"error": True, "detail": resp.get("detail", "")}
        if resp.get("session_expired"):
            body["session_expired"] = True
        return jsonify(body), resp.get("status_code", 500)
    return jsonify(resp)