"""Portfolio operations blueprint: business metrics, health and anomalies.

Endpoints
---------
``GET /api/tenants/metrics``      rollup window + health score per tenant
``GET /api/portfolio/anomalies``  cross-tenant anomalies (median + MAD z-score)
"""
from datetime import date as date_cls

from flask import Blueprint, jsonify, request
from services import portfolio_service

from blueprints.auth_bp import require_manager_auth

portfolio_bp = Blueprint("portfolio", __name__, url_prefix="/api")


@portfolio_bp.route("/tenants/metrics", methods=["GET"])
@require_manager_auth
def tenant_metrics():
    days = request.args.get("days", 14, type=int)
    include_inactive = request.args.get("all", "false").lower() == "true"
    return jsonify(portfolio_service.get_tenant_metrics(
        days=days, include_inactive=include_inactive))


@portfolio_bp.route("/portfolio/anomalies", methods=["GET"])
@require_manager_auth
def portfolio_anomalies():
    target = request.args.get("date")
    if target:
        try:
            date_cls.fromisoformat(target)
        except ValueError:
            return jsonify({"error": "date must be YYYY-MM-DD"}), 400

    kwargs = {
        "date": target,
        "include_inactive": request.args.get("all", "false").lower() == "true",
    }
    z = request.args.get("z", type=float)
    if z is not None:
        kwargs["z_threshold"] = z
    min_tenants = request.args.get("min_tenants", type=int)
    if min_tenants is not None:
        kwargs["min_tenants"] = min_tenants

    return jsonify(portfolio_service.get_portfolio_anomalies(**kwargs))