// ======================================================
// Timestamps
// ======================================================
// On pose un nouveau "last_on_at" si :
// - on allume réellement EDF
// - ou on adopte un EDF déjà ON avec latch OFF
const setLastOnAt =
  gridAction === 'turn_on' ||
  state === 'adopt_existing_grid_on' ||
  state === 'adopt_existing_grid_on_low_soc';

// On pose "last_off_at" si on coupe réellement EDF
const setLastOffAt =
  gridAction === 'turn_off';

// ======================================================
// Context / alerts
// ======================================================
reason.push(`Grid actuel ${gridIsOn ? 'ON' : 'OFF'}`);
reason.push(`Latch actuel ${latchIsOn ? 'ON' : 'OFF'}`);
reason.push(`SOC ${round1(soc)}% | seuils ${gridSocOn}%/${gridSocOff}%`);
reason.push(`PV ${Math.round(pvPowerW)}W`);
reason.push(`Charge AC maison ${Math.round(houseAcPowerW)}W`);
reason.push(`Puissance réseau ${Math.round(gridPowerW)}W`);
reason.push(`EVCS ${evcsSeemsActive ? 'actif' : 'inactif'} | ${Math.round(evcsAcPowerW)}W | status_raw=${Number.isFinite(evcsStatusRaw) ? evcsStatusRaw : 'n/a'}`);

if (minutesSinceLastOn !== null) {
  reason.push(`Dernier ON il y a ${round1(minutesSinceLastOn)} min`);
}
if (minutesSinceLastOff !== null) {
  reason.push(`Dernier OFF il y a ${round1(minutesSinceLastOff)} min`);
}

if (acOverSafeLimit) {
  reason.push(`⚠️ Charge AC maison ${Math.round(houseAcPowerW)}W >= limite sûre ${Math.round(acLoadsMaxSafeW)}W`);
}

// ======================================================
// Notifications
// ======================================================
let notifyTitle = 'Victron Grid Hysteresis';
let notifyMessage = '';
let notifyWanted = false;

if (state === 'turn_on_low_soc' || state === 'turn_on_low_soc_cooldown_bypassed') {
  notifyTitle = '⚡ EDF activé sur SOC bas';
  notifyMessage = `SOC ${round1(soc)}% <= ${gridSocOn}%. EDF activé et maintenu jusqu'à au moins ${gridSocOff}% (min ${gridMinOnMinutes} min).`;
  notifyWanted = true;

} else if (state === 'adopt_existing_grid_on_low_soc' || state === 'adopt_existing_grid_on') {
  notifyTitle = '🔁 EDF ON repris par hystérésis';
  notifyMessage = `EDF était déjà ON. Le workflow reprend la main et le maintient jusqu'à ${gridSocOff}% (min ${gridMinOnMinutes} min).`;
  notifyWanted = true;

} else if (state === 'turn_off_recovered') {
  notifyTitle = '✅ EDF coupé après recharge';
  notifyMessage = `SOC ${round1(soc)}% >= ${gridSocOff}%. Retour hors réseau autorisé.`;
  notifyWanted = true;

} else if (state === 'turn_off_stray_grid_on') {
  notifyTitle = '✅ EDF coupé (reprise de contrôle)';
  notifyMessage = `EDF était ON sans latch. SOC ${round1(soc)}% >= ${gridSocOff}%, coupure réseau appliquée.`;
  notifyWanted = true;

} else if (acOverSafeLimit && !gridIsOn) {
  notifyTitle = '🚨 Charge AC élevée hors réseau';
  notifyMessage = `Charge AC maison ${Math.round(houseAcPowerW)}W au-dessus de la limite sûre ${Math.round(acLoadsMaxSafeW)}W alors que EDF est OFF.`;
  notifyWanted = true;

} else if (acOverSafeLimit && gridIsOn) {
  notifyTitle = '⚠️ Charge AC élevée';
  notifyMessage = `Charge AC maison ${Math.round(houseAcPowerW)}W proche/au-dessus de la limite sûre ${Math.round(acLoadsMaxSafeW)}W.`;
  notifyWanted = true;
}

const shortReason = reason.join(' | ').slice(0, 255);

const signature = [
  now.date,
  state,
  `dg=${desiredGrid}`,
  `dl=${desiredLatch}`,
  `sb=${socBand}`,
  `ac=${acOverSafeLimit ? '1' : '0'}`
].join('|');

const signatureChanged = signature !== lastSignature;

const result = {
  timestamp_paris: now.stamp,

  inputs: {
    soc_percent: soc,
    grid_state: gridIsOn ? 'on' : 'off',
    pv_power_w: pvPowerW,
    house_ac_power_w: houseAcPowerW,
    grid_power_w: gridPowerW,
    evcs_ac_power_w: evcsAcPowerW,
    evcs_charging: evcsCharging,
    evcs_status_raw: Number.isFinite(evcsStatusRaw) ? evcsStatusRaw : null,
    hysteresis_enabled: hysteresisEnabled,
    notifications_enabled: notificationsEnabled,
    grid_latch: latchIsOn,
    grid_soc_on: gridSocOn,
    grid_soc_off: gridSocOff,
    grid_min_on_minutes: gridMinOnMinutes,
    grid_cooldown_minutes: gridCooldownMinutes,
    ac_loads_max_safe_w: acLoadsMaxSafeW,
    last_on_at: lastOnAt || null,
    last_off_at: lastOffAt || null,
    last_signature: lastSignature || null
  },

  computed: {
    desired_grid: desiredGrid,
    desired_latch: desiredLatch,
    minutes_since_last_on: minutesSinceLastOn !== null ? round1(minutesSinceLastOn) : null,
    minutes_since_last_off: minutesSinceLastOff !== null ? round1(minutesSinceLastOff) : null,
    min_on_elapsed: minOnElapsed,
    cooldown_elapsed: cooldownElapsed,
    ac_over_safe_limit: acOverSafeLimit,
    evcs_seems_active: evcsSeemsActive
  },

  decision: {
    state,
    grid_action: gridAction,
    latch_action: latchAction,
    set_last_on_at: setLastOnAt,
    set_last_off_at: setLastOffAt,
    should_notify: notificationsEnabled && signatureChanged && notifyWanted,
    signature,
    signature_changed: signatureChanged,
    reason,
    short_reason: shortReason
  },

  ha_service_calls: {
    helper_state: {
      domain: 'input_text',
      service: 'set_value',
      data: {
        entity_id: 'input_text.victron_grid_control_state',
        value: state
      }
    },

    helper_reason: {
      domain: 'input_text',
      service: 'set_value',
      data: {
        entity_id: 'input_text.victron_grid_control_reason',
        value: shortReason || 'Aucune raison'
      }
    },

    helper_signature: {
      domain: 'input_text',
      service: 'set_value',
      data: {
        entity_id: 'input_text.victron_grid_control_last_signature',
        value: signature
      }
    },

    helper_latch: {
      domain: 'input_boolean',
      service: desiredLatch === 'on' ? 'turn_on' : 'turn_off',
      data: {
        entity_id: 'input_boolean.victron_grid_hysteresis_latch'
      }
    },

    helper_last_on_at: {
      domain: 'input_datetime',
      service: 'set_datetime',
      data: {
        entity_id: 'input_datetime.victron_grid_last_on_at',
        datetime: now.stamp
      }
    },

    helper_last_off_at: {
      domain: 'input_datetime',
      service: 'set_datetime',
      data: {
        entity_id: 'input_datetime.victron_grid_last_off_at',
        datetime: now.stamp
      }
    },

    grid: {
      domain: 'switch',
      service: desiredGrid === 'on' ? 'turn_on' : 'turn_off',
      data: {
        entity_id: 'switch.edf_general_ok_switch'
      }
    },

    logbook: {
      domain: 'logbook',
      service: 'log',
      data: {
        name: 'Victron Grid Hysteresis',
        message: `${state} | Grid=${desiredGrid} | Latch=${desiredLatch} | SOC=${round1(soc)}% | AC=${Math.round(houseAcPowerW)}W | ${shortReason}`,
        entity_id: 'switch.edf_general_ok_switch'
      }
    },

    mobile_notification: {
      domain: cfg.mobileNotifyDomain,
      service: cfg.mobileNotifyService,
      data: {
        title: notifyTitle,
        message: notifyMessage,
        data: {
          push: {
            "interruption-level": "time-sensitive",
            sound: { name: "default" }
          },
          ttl: 0,
          priority: "high"
        }
      }
    }
  }
};

return [{ json: result }];