function clamp(v, min, max) {
  return Math.min(Math.max(v, min), max);
}

function round1(v) {
  return Math.round(v * 10) / 10;
}

function to2(n) {
  return String(n).padStart(2, '0');
}

function formatParisStampFromMs(ms) {
  const fmt = new Intl.DateTimeFormat('fr-FR', {
    timeZone: 'Europe/Paris',
    year: 'numeric',
    month: '2-digit',
    day: '2-digit',
    hour: '2-digit',
    minute: '2-digit',
    second: '2-digit',
    hour12: false,
  });

  const parts = Object.fromEntries(
    fmt.formatToParts(new Date(ms))
      .filter(p => p.type !== 'literal')
      .map(p => [p.type, p.value])
  );

  const hour = Number(parts.hour) === 24 ? 0 : Number(parts.hour);
  return `${parts.year}-${parts.month}-${parts.day} ${to2(hour)}:${parts.minute}:${parts.second}`;
}

const prev = $input.first().json;
const {
  now,
  nowMs,
  parsed,
  params,
  history,
  strategy,
  lifecycle,
  context,
  derived,
  locks,
  cloud,
  modes,
  safeguards,
  conditions,
  batteryTune,
} = prev;

// =====================================================
// DECISION INIT
// =====================================================
let desiredCharging = false;
let desiredPermission = false;
let desiredLatch = false;
let desiredCurrentA = params.currentMinA;

let state = 'idle';
let currentDecision = 'hold';
let dynamicOk = false;
let mustStop = false;

let reason = [];

let setCloudDebtStartedAt = false;
let setProbeStartedAt = false;

let notifyWanted = false;
let notifyTitle = 'Victron EVCS Surplus';
let notifyMessage = '';

let nextBlockReason = 'none';
let nextBlockedUntilStamp = now.stamp;

// =====================================================
// HELPERS
// =====================================================
function setOff({
  stateName,
  decisionName = 'stop',
  reasonText,
  dynamic = false,
  mustStopFlag = false,
  blockReason = 'none',
  blockedUntilStamp = now.stamp,
}) {
  desiredCharging = false;
  desiredPermission = false;
  desiredLatch = false;
  desiredCurrentA = params.currentMinA;

  state = stateName;
  currentDecision = decisionName;
  dynamicOk = dynamic;
  mustStop = mustStopFlag;
  nextBlockReason = blockReason;
  nextBlockedUntilStamp = blockedUntilStamp;

  if (reasonText) reason.push(reasonText);
}

function setOn({
  stateName,
  decisionName = 'hold',
  currentA = params.currentMinA,
  reasonText,
  dynamic = true,
  mustStopFlag = false,
}) {
  desiredCharging = true;
  desiredPermission = true;
  desiredLatch = true;
  desiredCurrentA = clamp(
    currentA,
    params.currentMinA,
    Math.max(params.currentMinA, derived.physicalCapA || params.currentMinA)
  );

  state = stateName;
  currentDecision = decisionName;
  dynamicOk = dynamic;
  mustStop = mustStopFlag;

  if (reasonText) reason.push(reasonText);
}

// =====================================================
// DECISION TREE
// =====================================================
if (!parsed.controllerEnabled) {
  desiredCharging = parsed.evcsChargingSwitchOn;
  desiredPermission = parsed.chargePermissionNow;
  desiredLatch = parsed.controlLatch;
  desiredCurrentA = clamp(
    derived.currentReferenceA || params.currentMinA,
    params.currentMinA,
    params.currentMaxAutoA
  );

  state = 'controller_disabled';
  currentDecision = 'hold';
  dynamicOk = false;
  mustStop = false;
  reason.push('Contrôleur désactivé');
}

else if (strategy.isStopMode) {
  setOff({
    stateName: 'stopped_user',
    decisionName: 'stop_stop_mode',
    reasonText: 'Arrêt manuel via Stratégie STOP',
    dynamic: false,
    mustStopFlag: false,
    blockReason: 'manual_stop',
    blockedUntilStamp: now.stamp,
  });
}

else if (parsed.evcsModeIsAuto) {
  setOff({
    stateName: 'mode_auto_conflict',
    decisionName: 'stop_auto_mode_conflict',
    reasonText: 'Borne en mode Auto interne',
    dynamic: false,
    mustStopFlag: true,
    blockReason: 'mode_auto_conflict',
    blockedUntilStamp: now.stamp,
  });
}

else if (!parsed.evcsDeviceConnected || !parsed.evcsVehicleConnected) {
  setOff({
    stateName: 'vehicle_not_connected',
    decisionName: 'stop_not_connected',
    reasonText: 'Véhicule ou borne non connecté',
    dynamic: false,
    mustStopFlag: false,
    blockReason: 'vehicle_not_connected',
    blockedUntilStamp: now.stamp,
  });
}

else if (safeguards.mustStopHard) {
  setOff({
    stateName:
      derived.anyVebusLowBattery ? 'vebus_low_battery_hard_stop' :
      derived.vebusDcVoltageHardLow ? 'vebus_dc_voltage_hard_stop' :
      derived.vebusAcOutHardReached ? 'vebus_ac_hard_stop' :
      safeguards.batteryCurrentHardExceeded ? 'battery_current_hard_stop' :
      'hard_stop',
    decisionName: 'stop_hard',
    reasonText: 'Hard stop de protection',
    dynamic: false,
    mustStopFlag: true,
    blockReason:
      safeguards.batteryCurrentHardExceeded ? 'battery_current_hard_stop' :
      derived.vebusDcVoltageHardLow ? 'vebus_dc_voltage_stop' :
      derived.anyVebusLowBattery ? 'vebus_low_battery_stop' :
      derived.vebusAcOutHardReached ? 'vebus_ac_hard_stop' :
      'battery_protection_stop',
    blockedUntilStamp: formatParisStampFromMs(nowMs + 15 * 60000),
  });
}

else if (cloud.sessionObservedActive) {
  if (cloud.enteringCloudDebt) {
    setCloudDebtStartedAt = true;
  }

  if (conditions.shouldStopOverloadAtMin) {
    setOff({
      stateName: 'vebus_overload_stop_min_current',
      decisionName: 'stop',
      reasonText: 'Arrêt: surcharge convertisseur persistante au courant mini',
      dynamic: false,
      mustStopFlag: true,
      blockReason: 'vebus_overload_persistent',
      blockedUntilStamp: formatParisStampFromMs(
        nowMs + batteryTune.global.overloadStopAfterSeconds * 1000
      ),
    });
  }

  else if (safeguards.gridBatteryProtectionStop) {
    setOff({
      stateName: 'stop_grid_battery_guard',
      decisionName: 'stop',
      reasonText: `Arrêt charge réseau: batterie trop sollicitée (${round1(parsed.batteryCurrentA)}A)`,
      dynamic: false,
      mustStopFlag: true,
      blockReason: 'grid_battery_guard',
      blockedUntilStamp: formatParisStampFromMs(nowMs + 20 * 60000),
    });
  }

  else if (conditions.probeFailedNow) {
    setOff({
      stateName: 'probe_failed_lock',
      decisionName: 'stop',
      reasonText: 'Mode sonde échoué',
      dynamic: false,
      mustStopFlag: true,
      blockReason: 'probe_failed',
      blockedUntilStamp: formatParisStampFromMs(nowMs + params.probeRetryMinutes * 60000),
    });
  }

  else if (derived.physicalCapA < params.currentMinA) {
    if (lifecycle.minRunElapsed) {
      setOff({
        stateName: 'stop_power_cap',
        decisionName: 'stop_power_cap',
        reasonText: 'Capacité système insuffisante',
        dynamic: false,
        mustStopFlag: true,
        blockReason: 'system_capacity_stop',
        blockedUntilStamp: formatParisStampFromMs(nowMs + 10 * 60000),
      });
    } else {
      setOn({
        stateName: 'hold_min_run_power_cap',
        decisionName: 'hold',
        currentA: params.currentMinA,
        reasonText: "Maintien jusqu'au temps mini ON",
        dynamic: false,
        mustStopFlag: false,
      });
    }
  }

  else if (conditions.probeWindowActive && !conditions.probeSuccessNow) {
    if (!conditions.probeHoldGuardOk) {
      setOff({
        stateName: 'probe_stop_guard',
        decisionName: 'stop',
        reasonText: 'Sonde interrompue: garde-fous non respectés',
        dynamic: false,
        mustStopFlag: true,
        blockReason: 'probe_failed',
        blockedUntilStamp: formatParisStampFromMs(nowMs + params.probeRetryMinutes * 60000),
      });
    } else {
      setOn({
        stateName: 'probe_hold',
        decisionName: 'hold',
        currentA: Math.min(params.probeCurrentA, derived.physicalCapA),
        reasonText: `Mode sonde actif à ${round1(Math.min(params.probeCurrentA, derived.physicalCapA))}A`,
        dynamic: true,
        mustStopFlag: false,
      });
    }
  }

  else {
    const activeSourceMode = conditions.probeSuccessNow ? 'solar_only' : context.sourceMode;

    const holdConditionsOk =
      (activeSourceMode === 'grid_hc_allowed' || activeSourceMode === 'grid_forced')
        ? conditions.gridHoldOk
        : (activeSourceMode === 'solar_only' || activeSourceMode === 'solar_potential')
          ? conditions.solarHoldOk
          : (activeSourceMode === 'hybrid_probe')
            ? conditions.probeHoldGuardOk
            : false;

    if (activeSourceMode === 'blocked') {
      if (lifecycle.minRunElapsed) {
        setOff({
          stateName: 'stop_source_lost',
          decisionName: 'stop',
          reasonText: 'Source autorisée perdue',
          dynamic: false,
          mustStopFlag: true,
          blockReason: context.profile === 'outside_window' ? 'outside_window' : 'source_unavailable',
          blockedUntilStamp:
            context.profile === 'outside_window' && Number.isFinite(locks.nextAllowedWindowStartMs)
              ? formatParisStampFromMs(locks.nextAllowedWindowStartMs)
              : formatParisStampFromMs(nowMs + params.minStopMinutes * 60000),
        });
      } else {
        setOn({
          stateName: 'hold_min_run_source_lost',
          decisionName: 'hold',
          currentA: Math.min(derived.currentReferenceA, derived.physicalCapA),
          reasonText: "Source perdue mais maintien jusqu'au mini ON",
          dynamic: false,
          mustStopFlag: false,
        });
      }
    }

    else if (!holdConditionsOk) {
      if (lifecycle.minRunElapsed) {
        setOff({
          stateName: 'stop_conditions_lost',
          decisionName: 'stop',
          reasonText: 'Conditions de maintien perdues',
          dynamic: false,
          mustStopFlag: true,
          blockReason: 'hold_conditions_lost',
          blockedUntilStamp: formatParisStampFromMs(nowMs + 10 * 60000),
        });
      } else {
        setOn({
          stateName: 'hold_min_run',
          decisionName: 'hold',
          currentA: Math.min(derived.currentReferenceA, derived.physicalCapA),
          reasonText: "Maintien jusqu'au temps mini ON",
          dynamic: true,
          mustStopFlag: false,
        });
      }
    }

    else if ((derived.currentReferenceA > derived.physicalCapA) && lifecycle.currentCooldownElapsed) {
      setOn({
        stateName: 'charging_step_down_system_cap',
        decisionName: 'step_down',
        currentA: Math.max(
          params.currentMinA,
          Math.min(
            derived.currentReferenceA - Math.max(params.currentStepDownA, 2),
            derived.physicalCapA
          )
        ),
        reasonText: 'Réduction pour respecter la capacité système',
        dynamic: true,
        mustStopFlag: false,
      });
    }

    else if (conditions.shouldStepDownOverload) {
      setOn({
        stateName: 'charging_step_down_overload',
        decisionName: 'step_down_fast',
        currentA: Math.max(
          params.currentMinA,
          Math.min(
            derived.currentReferenceA - Math.max(batteryTune.global.overloadStepDownA, params.currentStepDownA),
            derived.physicalCapA
          )
        ),
        reasonText: 'Baisse rapide: surcharge convertisseur',
        dynamic: true,
        mustStopFlag: false,
      });
    }

    else if (conditions.shouldStepDownVebusPower) {
      setOn({
        stateName: 'charging_step_down_vebus_power',
        decisionName: 'step_down_fast',
        currentA: Math.max(
          params.currentMinA,
          Math.min(
            derived.currentReferenceA - Math.max(params.currentStepDownA + 1, 3),
            derived.physicalCapA
          )
        ),
        reasonText: 'Baisse rapide: puissance VE.Bus élevée',
        dynamic: true,
        mustStopFlag: false,
      });
    }

    else if (conditions.shouldStepDownVebusVoltage) {
      setOn({
        stateName: 'charging_step_down_dc_voltage',
        decisionName: 'step_down_fast',
        currentA: Math.max(
          params.currentMinA,
          Math.min(
            derived.currentReferenceA - Math.max(params.currentStepDownA + 1, 3),
            derived.physicalCapA
          )
        ),
        reasonText: 'Baisse rapide: tension DC basse',
        dynamic: true,
        mustStopFlag: false,
      });
    }

    else if (
      (activeSourceMode === 'grid_hc_allowed' || activeSourceMode === 'grid_forced') &&
      conditions.gridShouldStepDownBattery
    ) {
      setOn({
        stateName: 'charging_step_down_grid_guard',
        decisionName: 'step_down',
        currentA: Math.max(
          params.currentMinA,
          Math.min(
            derived.currentReferenceA - params.currentStepDownA,
            derived.physicalCapA
          )
        ),
        reasonText: 'Réduction réseau: la batterie commence à participer',
        dynamic: true,
        mustStopFlag: false,
      });
    }

    else if (
      (activeSourceMode === 'solar_only' || activeSourceMode === 'solar_potential') &&
      conditions.solarShouldStepDownCloudDebt
    ) {
      setOn({
        stateName: 'charging_step_down_cloud_debt',
        decisionName: 'step_down',
        currentA: Math.max(
          params.currentMinA,
          Math.min(
            derived.currentReferenceA - Math.max(params.currentStepDownA, 2),
            derived.physicalCapA
          )
        ),
        reasonText: 'Réduction: dette nuage trop élevée',
        dynamic: true,
        mustStopFlag: false,
      });
    }

    else if (
      (activeSourceMode === 'solar_only' || activeSourceMode === 'solar_potential') &&
      conditions.solarShouldStepDownBattery
    ) {
      setOn({
        stateName: 'charging_step_down_battery',
        decisionName: 'step_down',
        currentA: Math.max(
          params.currentMinA,
          Math.min(
            derived.currentReferenceA - params.currentStepDownA,
            derived.physicalCapA
          )
        ),
        reasonText: 'Réduction: batterie trop sollicitée',
        dynamic: true,
        mustStopFlag: false,
      });
    }

    else if (
      (activeSourceMode === 'grid_hc_allowed' || activeSourceMode === 'grid_forced') &&
      conditions.gridShouldStepUp
    ) {
      setOn({
        stateName:
          activeSourceMode === 'grid_forced'
            ? 'charging_step_up_grid_forced'
            : 'charging_step_up_grid_hc',
        decisionName: 'step_up',
        currentA: clamp(
          derived.currentReferenceA + params.currentStepUpA,
          params.currentMinA,
          derived.physicalCapA
        ),
        reasonText:
          activeSourceMode === 'grid_forced'
            ? 'Hausse prudente du courant en charge réseau forcée'
            : 'Hausse prudente du courant en HC réseau',
        dynamic: true,
        mustStopFlag: false,
      });
    }

    else if (
      (activeSourceMode === 'solar_only' || activeSourceMode === 'solar_potential') &&
      conditions.solarShouldStepUp
    ) {
      setOn({
        stateName:
          conditions.probeSuccessNow
            ? 'probe_success_step_up'
            : (modes.batteryPriorityMode
                ? 'charging_step_up_battery'
                : 'charging_step_up_forecast'),
        decisionName: 'step_up',
        currentA: clamp(
          derived.currentReferenceA + params.currentStepUpA,
          params.currentMinA,
          derived.physicalCapA
        ),
        reasonText: 'Hausse prudente du courant',
        dynamic: true,
        mustStopFlag: false,
      });
    }

    else {
      setOn({
        stateName:
          conditions.probeSuccessNow ? 'probe_success_hold' :
          (activeSourceMode === 'grid_hc_allowed' || activeSourceMode === 'grid_forced') ? 'charging_hold_grid' :
          cloud.cloudDebtActive ? 'charging_hold_cloud_tolerance' :
          'charging_hold',
        decisionName: 'hold',
        currentA: Math.min(derived.currentReferenceA, derived.physicalCapA),
        reasonText: 'Maintien du courant',
        dynamic: true,
        mustStopFlag: false,
      });
    }
  }
}

// =====================================================
// START BRANCH
// =====================================================
else {
  const startConditionsOk =
    (context.sourceMode === 'grid_hc_allowed' || context.sourceMode === 'grid_forced')
      ? conditions.gridStartOk
      : (context.sourceMode === 'solar_only' || context.sourceMode === 'solar_potential')
        ? conditions.solarStartOk
        : context.sourceMode === 'hybrid_probe'
          ? conditions.probeStartOk
          : false;

  if (!derived.canRunAtMinCurrent) {
    setOff({
      stateName: 'blocked_by_capacity_min_current',
      decisionName: 'hold',
      reasonText: 'Capacité insuffisante pour courant mini',
      dynamic: false,
      mustStopFlag: false,
      blockReason: 'system_capacity_stop',
      blockedUntilStamp: formatParisStampFromMs(nowMs + 10 * 60000),
    });
  }

  else if (context.sourceMode === 'blocked') {
    setOff({
      stateName:
        context.profile === 'outside_window'
          ? 'blocked_outside_window'
          : (context.profile === 'night_hc'
              ? 'night_no_grid_hc_lock'
              : 'idle_wait_source'),
      decisionName: 'hold',
      reasonText:
        context.profile === 'outside_window'
          ? 'Hors fenêtre préférée sans source suffisante'
          : context.profile === 'night_hc'
            ? 'Nuit sans autorisation HC réseau'
            : 'Source non autorisée ou insuffisante',
      dynamic: false,
      mustStopFlag: false,
      blockReason:
        context.profile === 'outside_window'
          ? 'outside_window'
          : context.profile === 'night_hc'
            ? 'grid_hc_unavailable'
            : 'source_unavailable',
      blockedUntilStamp:
        Number.isFinite(locks.nextAllowedWindowStartMs)
          ? formatParisStampFromMs(locks.nextAllowedWindowStartMs)
          : formatParisStampFromMs(nowMs + 15 * 60000),
    });
  }

  else if (locks.startBlockedByReason) {
    setOff({
      stateName: 'wait_reason_lock',
      decisionName: 'hold',
      reasonText: `Blocage anti-cliquetis: ${history.lastBlockReason}`,
      dynamic: false,
      mustStopFlag: false,
      blockReason: history.lastBlockReason,
      blockedUntilStamp: history.blockedUntilAt || now.stamp,
    });
  }

  else if (!startConditionsOk) {
    setOff({
      stateName: 'idle_wait_conditions',
      decisionName: 'hold',
      reasonText: 'Conditions de démarrage non réunies',
      dynamic: false,
      mustStopFlag: false,
      blockReason: 'none',
      blockedUntilStamp: now.stamp,
    });
  }

  else if (!lifecycle.minStopElapsed) {
    setOff({
      stateName: 'wait_min_stop',
      decisionName: 'hold',
      reasonText: 'Temps mini OFF non écoulé',
      dynamic: false,
      mustStopFlag: false,
      blockReason: 'none',
      blockedUntilStamp: now.stamp,
    });
  }

  else {
    const startCurrentA =
      context.sourceMode === 'hybrid_probe'
        ? clamp(params.probeCurrentA, params.currentMinA, derived.physicalCapA)
        : params.currentMinA;

    setOn({
      stateName:
        context.sourceMode === 'grid_forced' ? 'start_grid_forced_min_current' :
        context.sourceMode === 'grid_hc_allowed' ? 'start_grid_hc_min_current' :
        context.sourceMode === 'hybrid_probe' ? 'probe_start_6a' :
        context.sourceMode === 'solar_potential' ? 'start_forecast_solar_potential' :
        modes.batteryFullHarvestMode ? 'start_min_current_battery_full_harvest' :
        modes.forecastCommitMode ? 'start_min_current_forecast_commit' :
        'start_min_current',
      decisionName: 'start',
      currentA: startCurrentA,
      reasonText:
        context.sourceMode === 'grid_forced'
          ? 'Démarrage en charge réseau forcée'
          : context.sourceMode === 'grid_hc_allowed'
            ? 'Démarrage en fenêtre HC réseau'
            : context.sourceMode === 'hybrid_probe'
              ? 'Démarrage en mode sonde'
              : context.sourceMode === 'solar_potential'
                ? 'Démarrage par potentiel solaire confirmé'
                : modes.batteryFullHarvestMode
                  ? 'Démarrage harvest solaire'
                  : modes.forecastCommitMode
                    ? 'Démarrage forecast commit'
                    : 'Démarrage prudent à courant mini',
      dynamic: true,
      mustStopFlag: false,
    });

    nextBlockReason = 'none';
    nextBlockedUntilStamp = now.stamp;
    setProbeStartedAt = context.sourceMode === 'hybrid_probe';
  }
}

// =====================================================
// OUTPUT
// =====================================================
return [{
  json: {
    ...prev,
    decision: {
      desiredCharging,
      desiredPermission,
      desiredLatch,
      desiredCurrentA,
      state,
      currentDecision,
      dynamicOk,
      mustStop,
      reason,
      nextBlockReason,
      nextBlockedUntilStamp,
      setCloudDebtStartedAt,
      setProbeStartedAt,
      notifyWanted,
      notifyTitle,
      notifyMessage,
    }
  }
}];