/* Powermieter — building / WE pre-fill seed data.
   In production this comes from Powerhouse 360's project database
   (one record per finished Wohneinheit). Everything here is what we
   ALREADY know about the building — so the tenant only confirms +
   signs. Replace with a real fetch per ?b=<buildingId>. */

const TARIFF = {
  name: 'Powermieter Mieterstrom Basis',
  arbeitspreis: '28,9 ct/kWh',
  grundpreis: '8,90 €/Monat',
  vergleich: '41,5 ct/kWh',     // local Grundversorger reference
  ersparnisProzent: 30,
  laufzeit: '12 Monate, danach monatlich kündbar',
  widerrufstage: 14,
};

const BUILDINGS = {
  'BLN-PRENZL-12': {
    id: 'BLN-PRENZL-12',
    name: 'Prenzlauer Allee 12',
    strasse: 'Prenzlauer Allee', hausnr: '12', plz: '10405', ort: 'Berlin',
    anlage: 'Dach-PV 78 kWp · Inbetriebnahme 04/2026',
    lieferbeginn: '01.08.2026',
    units: [
      { we: 'W01', etage: 'EG links',  klingel: 'Schneider', zaehler: '1 ESY 1100 2201', verbrauch: 2100, signed: false },
      { we: 'W02', etage: 'EG rechts', klingel: 'Yılmaz',    zaehler: '1 ESY 1100 2202', verbrauch: 3200, signed: true  },
      { we: 'W03', etage: '1. OG links',  klingel: 'Becker', zaehler: '1 ESY 1100 2203', verbrauch: 2500, signed: false },
      { we: 'W04', etage: '1. OG rechts', klingel: 'Nowak',  zaehler: '1 ESY 1100 2204', verbrauch: 1800, signed: false },
      { we: 'W05', etage: '2. OG links',  klingel: 'Fischer',zaehler: '1 ESY 1100 2205', verbrauch: 2900, signed: false },
      { we: 'W06', etage: '2. OG rechts', klingel: 'Rossi',  zaehler: '1 ESY 1100 2206', verbrauch: 2400, signed: false },
    ],
  },
};

/* Pull the building from ?b=, else the demo default. */
function getBuilding(id) {
  return BUILDINGS[id] || BUILDINGS['BLN-PRENZL-12'];
}
function getUnit(building, we) {
  return building.units.find((u) => u.we === we) || null;
}

/* Estimated yearly saving for a given consumption (kWh). */
function estSaving(verbrauch) {
  const cur = 0.415, neu = 0.289;
  const v = Number(verbrauch) || 2500;
  return Math.round(v * (cur - neu));
}

window.TARIFF = TARIFF;
window.getBuilding = getBuilding;
window.getUnit = getUnit;
window.estSaving = estSaving;