// Rôle : fournit le simulateur de chance pour calculer et simuler des taux enregistrés.
import { useEffect, useMemo, useRef, useState } from "react";
import { Icon } from "../../../components/Icon.jsx";
import { Tabs } from "../../../components/Tabs.jsx";
import { useDraftForm } from "../../../hooks/useDraftForm.js";
import { useKeyedState } from "../../../hooks/useKeyedState.js";
import { TextExchangeActions } from "./TextExchangeActions.jsx";
import {
  RNG_SIMULATOR_DEFAULT_RATE,
  RNG_SIMULATOR_HOURLY_DURATION_PRESETS,
  RNG_SIMULATOR_HISTORY_LIMIT,
  RNG_SIMULATOR_LIMITS,
  addRngSimulationHistory,
  calculateAtLeastOneProbability,
  calculateRngCostSummary,
  calculateRngRealDrawsSummary,
  calculateRngSummary,
  clampDecimal,
  clampInteger,
  getEffectiveRate,
  isValidRateString,
  normalizeCostString,
  normalizeRateString,
  simulateRngDraws
} from "./rngSimulatorUtils.js";

const CHANCE_TARGETS = [50, 90, 95, 99];
const RNG_TABS = [
  { id: "tracking", label: "Suivi" },
  { id: "forecasts", label: "Prévisions" },
  { id: "simulation", label: "Simulation" }
];

function formatNumber(value, maximumFractionDigits = 2) {
  if (!Number.isFinite(value)) return "—";
  return value.toLocaleString("fr-FR", { maximumFractionDigits });
}

function formatPercent(value, maximumFractionDigits = 6) {
  if (!Number.isFinite(value)) return "—";
  return `${value.toLocaleString("fr-FR", { maximumFractionDigits })} %`;
}

function formatCost(value) {
  if (!Number.isFinite(value)) return "—";
  return formatNumber(value, 0);
}

function formatSignedCost(value) {
  if (!Number.isFinite(value)) return "—";
  if (value === 0) return "0";
  return `${value > 0 ? "+" : ""}${formatCost(value)}`;
}

function formatDrawTarget(value, unit) {
  if (!Number.isFinite(value)) return `— ${unit}`;
  if (value >= 1000000) {
    return `${value.toLocaleString("fr-FR", { notation: "compact", maximumFractionDigits: 2 })} ${unit}`;
  }
  return `${formatNumber(value, 0)} ${unit}`;
}

function formatSignedPercent(value, maximumFractionDigits = 2) {
  if (!Number.isFinite(value)) return "0 %";
  const prefix = value > 0 ? "+" : "";
  return `${prefix}${formatNumber(value, maximumFractionDigits)} %`;
}

function formatTime(value, unit) {
  if (!Number.isFinite(value) || value <= 0) return "—";
  return `${formatNumber(value, 2)} ${unit}`;
}

function getSessionStorage() {
  if (typeof window === "undefined") return null;
  try {
    return window.sessionStorage;
  } catch {
    return null;
  }
}

function readSimulationHistory(storageKey) {
  const storage = getSessionStorage();
  if (!storage) return [];
  try {
    const parsed = JSON.parse(storage.getItem(storageKey) || "[]");
    return Array.isArray(parsed) ? parsed.map(normalizeSessionHistoryEntry).filter(Boolean).slice(0, RNG_SIMULATOR_HISTORY_LIMIT) : [];
  } catch {
    return [];
  }
}

function normalizeSessionHistoryEntry(entry, index) {
  const draws = clampInteger(entry?.draws, RNG_SIMULATOR_LIMITS.simulationDrawsMin, RNG_SIMULATOR_LIMITS.simulationDrawsMax, 0);
  if (!draws) return null;
  const successes = clampInteger(entry?.successes, 0, draws, 0);
  return {
    id: entry?.id || `rng-session-${index}`,
    rateId: String(entry?.rateId || "").trim(),
    label: String(entry?.label || "").trim() || "Simulation",
    rate: normalizeRateString(entry?.rate),
    costPerDraw: normalizeCostString(entry?.costPerDraw),
    multiplier: clampDecimal(entry?.multiplier, RNG_SIMULATOR_LIMITS.multiplierMin, RNG_SIMULATOR_LIMITS.multiplierMax, 0),
    draws,
    successes,
    fails: draws - successes,
    observedRate: draws > 0 ? (successes / draws) * 100 : 0,
    longestFailStreak: clampInteger(entry?.longestFailStreak, 0, draws, 0),
    longestSuccessStreak: clampInteger(entry?.longestSuccessStreak, 0, draws, 0),
    firstSuccessDraw: clampInteger(entry?.firstSuccessDraw, 0, draws, 0)
  };
}

function writeSimulationHistory(storageKey, history) {
  const storage = getSessionStorage();
  if (!storage) return;
  try {
    storage.setItem(storageKey, JSON.stringify(history.slice(0, RNG_SIMULATOR_HISTORY_LIMIT)));
  } catch {
    // L'historique de session est opportuniste; l'outil reste utilisable sans stockage.
  }
}

function historyEntryMatchesRate(entry, rate) {
  if (!entry || !rate) return false;
  if (entry.rateId) return entry.rateId === rate.id;
  return entry.label === rate.label && entry.rate === rate.rate;
}

function getAveragePositionLabel(status, textContent) {
  const labels = {
    start: textContent.averageStatusStartLabel || "Début de suivi",
    farBelow: textContent.averageStatusFarBelowLabel || "Loin sous la moyenne",
    below: textContent.averageStatusBelowLabel || "Un peu moins que la moyenne",
    average: textContent.averageStatusAverageLabel || "Dans la moyenne",
    slightlyAbove: textContent.averageStatusSlightlyAboveLabel || "Un peu au-dessus de la moyenne",
    high: textContent.averageStatusHighLabel || "Très au-dessus de la moyenne",
    catastrophic: textContent.averageStatusCatastrophicLabel || "Catastrophique"
  };
  return labels[status?.id] || labels.start;
}

function getToneFromDelta(value) {
  if (!Number.isFinite(value) || value === 0) return "";
  return value > 0 ? "positive" : "negative";
}

export function RngSimulatorModule({ toolboxId, moduleId, context, editing = false, setEditing = () => {}, textExchangeOpen }) {
  const rawData = context.getModuleData(toolboxId, moduleId, {});
  const data = useMemo(() => context.normalizeRngSimulatorData(rawData), [context, rawData]);
  const textContent = context.moduleText?.rngSimulator || {};
  const tabs = useMemo(() => [
    { ...RNG_TABS[0], label: textContent.trackingTabLabel || RNG_TABS[0].label },
    { ...RNG_TABS[1], label: textContent.forecastsTabLabel || RNG_TABS[1].label },
    { ...RNG_TABS[2], label: textContent.simulationTabLabel || RNG_TABS[2].label }
  ], [textContent.forecastsTabLabel, textContent.simulationTabLabel, textContent.trackingTabLabel]);
  const historyStorageKey = `rng-simulator:${toolboxId}:${moduleId}:history`;
  const [activeTab, setActiveTab] = useState("tracking");
  const [history, setHistory] = useKeyedState(historyStorageKey, readSimulationHistory);
  const [editingRateId, setEditingRateId] = useState("");
  const [multiplierDraft, setMultiplierDraft] = useState(null);
  const [costDraft, setCostDraft] = useState(null);
  const [occurrenceUnit, setOccurrenceUnit] = useState("perHour");
  const [occurrenceDraft, setOccurrenceDraft] = useState(null);
  const [realDrawsDraft, setRealDrawsDraft] = useState(null);
  const rateFormRef = useRef(null);
  const previousEditingRef = useRef(editing);
  const rateDraft = useDraftForm({ label: "", rate: RNG_SIMULATOR_DEFAULT_RATE });
  const rateFormOpen = editing || Boolean(editingRateId);
  const activeRate = data.rates.find((rate) => rate.id === data.activeRateId) || data.rates[0] || null;
  const summary = useMemo(() => activeRate ? calculateRngSummary({
    rate: activeRate.rate,
    multiplier: activeRate.multiplier,
    simulationDraws: data.settings.simulationDraws,
    occurrenceValue: activeRate.occurrenceValue,
    occurrenceUnit: activeRate.occurrenceUnit
  }) : null, [activeRate, data.settings.simulationDraws]);
  const costSummary = useMemo(() => activeRate && summary ? calculateRngCostSummary({
    costPerDraw: costDraft ?? activeRate.costPerDraw,
    averageDraws: summary.averageDraws,
    drawsForChance: summary.drawsForChance,
    simulationDraws: data.settings.simulationDraws,
    simulationSuccesses: 0
  }) : null, [activeRate, costDraft, data.settings.simulationDraws, summary]);
  const activeHistory = useMemo(() => history.filter((entry) => historyEntryMatchesRate(entry, activeRate)), [activeRate, history]);
  const chanceWithoutMultiplier = activeRate ? calculateAtLeastOneProbability(activeRate.rate, data.settings.simulationDraws, 0) : 0;
  const realDrawsSummary = useMemo(() => activeRate && summary ? calculateRngRealDrawsSummary({
    rate: activeRate.rate,
    multiplier: activeRate.multiplier,
    realDraws: activeRate.realDraws,
    averageDraws: summary.averageDraws,
    drawsForChance: summary.drawsForChance,
    costPerDraw: activeRate.costPerDraw
  }) : null, [activeRate, summary]);
  const averageDrawsDelta = activeRate && summary ? activeRate.realDraws - summary.averageDraws : 0;
  const averageExceededDraws = Math.max(0, Math.round(averageDrawsDelta));
  const averageDrawsTone = realDrawsSummary?.averageExceeded ? (averageExceededDraws > 0 ? "negative" : "") : "positive";

  useEffect(() => {
    const wasEditing = previousEditingRef.current;
    if (wasEditing && !editing) setEditingRateId("");
    if (!wasEditing && editing && !editingRateId) rateDraft.reset({ label: "", rate: RNG_SIMULATOR_DEFAULT_RATE });
    previousEditingRef.current = editing;
    // Le hook useDraftForm expose reset sans identité stable; cette transition ne doit dépendre que de l'ouverture.
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [editing, editingRateId]);

  useEffect(() => {
    if (!rateFormOpen) return undefined;
    function closeOnOutsidePointer(event) {
      if (event.target.closest?.(".module-edit-button")) return;
      if (!rateFormRef.current?.contains(event.target)) {
        setEditingRateId("");
        setEditing(false);
      }
    }
    document.addEventListener("pointerdown", closeOnOutsidePointer);
    return () => document.removeEventListener("pointerdown", closeOnOutsidePointer);
  }, [rateFormOpen, setEditing]);

  useEffect(() => {
    setMultiplierDraft(null);
    setCostDraft(null);
    setOccurrenceDraft(null);
    setRealDrawsDraft(null);
    setOccurrenceUnit(activeRate?.occurrenceUnit || "perHour");
  }, [activeRate?.id, activeRate?.occurrenceUnit]);

  function save(nextData) {
    context.setModuleData(toolboxId, moduleId, nextData, "rngSimulator");
  }

  function updateSettings(field, value) {
    const settings = { ...data.settings };
    if (field === "simulationDraws") {
      settings[field] = clampInteger(value, RNG_SIMULATOR_LIMITS.simulationDrawsMin, RNG_SIMULATOR_LIMITS.simulationDrawsMax, data.settings.simulationDraws);
    }
    save({ ...data, settings });
  }

  function updateActiveRateSettings(field, value) {
    if (!activeRate) return;
    const nextValue = field === "multiplier"
      ? clampDecimal(value, RNG_SIMULATOR_LIMITS.multiplierMin, RNG_SIMULATOR_LIMITS.multiplierMax, 0)
      : clampDecimal(value, RNG_SIMULATOR_LIMITS.occurrenceRateMin, RNG_SIMULATOR_LIMITS.occurrenceRateMax, activeRate[field]);
    save({
      ...data,
      rates: data.rates.map((rate) => rate.id === activeRate.id ? { ...rate, [field]: nextValue } : rate)
    });
  }

  function updateMultiplier(value) {
    setMultiplierDraft(value);
    if (String(value).trim() === "") {
      updateActiveRateSettings("multiplier", 0);
      return;
    }
    updateActiveRateSettings("multiplier", value);
  }

  function blurMultiplier() {
    if (multiplierDraft === null) return;
    const raw = multiplierDraft.trim();
    const parsed = Number(raw.replace(",", "."));
    if (!raw || !Number.isFinite(parsed)) updateActiveRateSettings("multiplier", 0);
    setMultiplierDraft(null);
  }

  function updateCost(value) {
    setCostDraft(value);
  }

  function blurCost() {
    if (!activeRate || costDraft === null) return;
    save({
      ...data,
      rates: data.rates.map((rate) => rate.id === activeRate.id ? { ...rate, costPerDraw: normalizeCostString(costDraft) } : rate)
    });
    setCostDraft(null);
  }

  function updateOccurrence(value) {
    setOccurrenceDraft(value);
    if (!activeRate) return;
    if (String(value).trim() === "") {
      save({
        ...data,
        rates: data.rates.map((rate) => rate.id === activeRate.id ? { ...rate, occurrenceValue: 0, occurrenceUnit } : rate)
      });
      return;
    }
    const nextValue = clampDecimal(value, RNG_SIMULATOR_LIMITS.occurrenceRateMin, RNG_SIMULATOR_LIMITS.occurrenceRateMax, activeRate.occurrenceValue);
    save({
      ...data,
      rates: data.rates.map((rate) => rate.id === activeRate.id ? { ...rate, occurrenceValue: nextValue, occurrenceUnit } : rate)
    });
  }

  function changeOccurrenceUnit(unit) {
    setOccurrenceUnit(unit);
    setOccurrenceDraft(null);
    if (!activeRate) return;
    save({
      ...data,
      rates: data.rates.map((rate) => rate.id === activeRate.id ? { ...rate, occurrenceValue: activeRate.occurrenceValue, occurrenceUnit: unit } : rate)
    });
  }

  function blurOccurrence() {
    if (occurrenceDraft === null) return;
    const value = occurrenceDraft;
    const raw = value.trim();
    const parsed = Number(raw.replace(",", "."));
    if (!raw || !Number.isFinite(parsed)) updateOccurrence("");
    setOccurrenceDraft(null);
  }

  function updateRealDraws(value) {
    setRealDrawsDraft(value);
    if (!activeRate) return;
    if (String(value).trim() === "") {
      save({
        ...data,
        rates: data.rates.map((rate) => rate.id === activeRate.id ? { ...rate, realDraws: 0 } : rate)
      });
      return;
    }
    save({
      ...data,
      rates: data.rates.map((rate) => rate.id === activeRate.id ? { ...rate, realDraws: clampInteger(value, 0, RNG_SIMULATOR_LIMITS.realDrawsMax, activeRate.realDraws) } : rate)
    });
  }

  function blurRealDraws() {
    if (realDrawsDraft === null) return;
    const raw = realDrawsDraft.trim();
    const parsed = Number.parseInt(raw.replace(/[\s\u00a0]/g, ""), 10);
    if (!raw || !Number.isFinite(parsed)) updateRealDraws("");
    setRealDrawsDraft(null);
  }

  function submitRate(event) {
    rateDraft.handleSubmit(event, (draft, { reset }) => {
      const label = draft.label.trim();
      if (!label) return textContent.rateLabelRequired || "Libellé requis.";
      if (!isValidRateString(draft.rate)) return textContent.rateInvalid || "Taux invalide.";
      const rate = normalizeRateString(draft.rate);
      if (editingRateId) {
        save({ ...data, rates: data.rates.map((item) => item.id === editingRateId ? { ...item, label, rate } : item) });
        setEditingRateId("");
      } else {
        const id = context.uid("rng");
        save({ ...data, activeRateId: id, rates: [...data.rates, { id, label, rate }] });
      }
      reset({ label: "", rate: RNG_SIMULATOR_DEFAULT_RATE });
      setEditing(false);
      return "";
    });
  }

  function editRate(rate) {
    setEditingRateId(rate.id);
    setEditing(true);
    rateDraft.reset({ label: rate.label, rate: rate.rate });
  }

  function cancelEdit() {
    setEditingRateId("");
    rateDraft.reset({ label: "", rate: RNG_SIMULATOR_DEFAULT_RATE });
    setEditing(false);
  }

  function selectRate(rate) {
    save({ ...data, activeRateId: rate.id });
  }

  function deleteRate(rateId) {
    const rates = data.rates.filter((rate) => rate.id !== rateId);
    save({ ...data, rates, activeRateId: data.activeRateId === rateId ? rates[0]?.id || "" : data.activeRateId });
    if (editingRateId === rateId) cancelEdit();
  }

  function runSimulation() {
    if (!activeRate) return;
    const result = simulateRngDraws(activeRate.rate, data.settings.simulationDraws, Math.random, activeRate.multiplier);
    const entry = {
      id: context.uid("rng"),
      rateId: activeRate.id,
      label: activeRate.label,
      rate: activeRate.rate,
      costPerDraw: activeRate.costPerDraw,
      multiplier: activeRate.multiplier,
      ...result
    };
    const nextHistory = addRngSimulationHistory(history, entry);
    setHistory(nextHistory);
    writeSimulationHistory(historyStorageKey, nextHistory);
  }

  function clearHistory() {
    const nextHistory = activeRate ? history.filter((entry) => !historyEntryMatchesRate(entry, activeRate)) : [];
    setHistory(nextHistory);
    writeSimulationHistory(historyStorageKey, nextHistory);
  }

  return (
    <>
      {textExchangeOpen && (
        <div className="module-text-exchange-panel">
          <TextExchangeActions type="rngSimulator" data={data} context={context} textContent={textContent} onImport={(nextData) => context.setModuleData(toolboxId, moduleId, nextData, "rngSimulator")} />
        </div>
      )}
      <div className="rng-simulator-tool">
        <section className="rng-simulator-panel rng-simulator-rates-panel">
          <header>
            <div>
              <h3>{textContent.ratesTitle || "Taux enregistrés"}</h3>
              <span className="rng-simulator-count">{data.rates.length}</span>
            </div>
          </header>

          <div className="rng-simulator-rate-layout">
            {rateFormOpen && (
              <form className="rng-simulator-rate-form" ref={rateFormRef} onSubmit={submitRate}>
                <label className="rng-simulator-field">
                  <span>{textContent.labelLabel || "Libellé"}</span>
                  <input {...rateDraft.getFieldProps("label", { className: "nds-input", "data-size": "sm", type: "text", placeholder: textContent.labelPlaceholder || "Drop rare" })} />
                </label>
                <label className="rng-simulator-field">
                  <span>{textContent.rateLabel || "Taux (%)"}</span>
                  <input {...rateDraft.getFieldProps("rate", { className: "nds-input", "data-size": "sm", type: "text", inputMode: "decimal", placeholder: RNG_SIMULATOR_DEFAULT_RATE })} />
                </label>
                {rateDraft.error && <p className="rng-simulator-error">{rateDraft.error}</p>}
                <div className="rng-simulator-form-actions">
                  <button className="nds-button" data-size="sm" data-variant="primary" type="submit">
                    <Icon name={editingRateId ? "save" : "add"} />
                    <span>{editingRateId ? textContent.saveRateButton || "Enregistrer" : textContent.addRateButton || "Ajouter"}</span>
                  </button>
                  {data.rates.length > 0 && (
                    <button className="nds-button" data-size="sm" type="button" onClick={cancelEdit}>
                      {textContent.cancelButton || "Annuler"}
                    </button>
                  )}
                </div>
              </form>
            )}

            <div className="rng-simulator-rates nds-scrollbox">
              {data.rates.length ? data.rates.map((rate) => (
                <article className={`rng-simulator-rate-row ${rate.id === activeRate?.id ? "is-active" : ""}`} key={rate.id}>
                  <button type="button" onClick={() => selectRate(rate)}>
                    <strong>{rate.label}</strong>
                    <span>{rate.rate} %</span>
                  </button>
                  <div className="rng-simulator-rate-actions">
                    <button className="nds-icon-button" data-size="xs" type="button" onClick={() => editRate(rate)} aria-label={`${textContent.editRateTitle || "Modifier"} ${rate.label}`} title={textContent.editRateTitle || "Modifier"}>
                      <Icon name="edit" />
                    </button>
                    <button className="nds-icon-button" data-size="xs" data-variant="danger" type="button" onClick={() => deleteRate(rate.id)} aria-label={`${textContent.deleteTitle || "Supprimer"} ${rate.label}`} title={textContent.deleteTitle || "Supprimer"}>
                      <Icon name="trash" />
                    </button>
                  </div>
                </article>
              )) : <p className="rng-simulator-empty">{textContent.emptyRates || "Aucun taux enregistré."}</p>}
            </div>

            {activeRate && summary && (
              <div className="rng-simulator-active-summary">
                <RngInfo label={textContent.activeRateLabel || "Taux brut"} value={`${activeRate.rate} %`} />
              </div>
            )}
          </div>
        </section>

        <section className="rng-simulator-panel rng-simulator-common-panel">
          <header>
            <div>
              <h3>{textContent.commonSettingsTitle || "Paramètres du taux"}</h3>
            </div>
          </header>
          {activeRate && summary ? (
            <div className="rng-simulator-primary-controls">
              <div className="rng-simulator-primary-column">
                <div className="rng-simulator-field rng-simulator-multiplier-field">
                  <span>{textContent.multiplierLabel || "Multiplicateur (%)"}</span>
                  <div className="rng-simulator-percent-input">
                    <input className="nds-input" data-size="sm" type="number" step="any" value={multiplierDraft ?? String(activeRate.multiplier ?? 0)} onChange={(event) => updateMultiplier(event.target.value)} onBlur={blurMultiplier} aria-label={textContent.multiplierLabel || "Multiplicateur (%)"} />
                    <span>%</span>
                  </div>
                </div>
                <div className="rng-simulator-stat-grid">
                  <RngStat label={textContent.effectiveRateLabel || "Taux final"} value={formatPercent(summary.effectiveRate, 6)} />
                  <RngStat label={textContent.averageDrawsLabel || "Moyenne avant réussite"} value={`${formatNumber(summary.averageDraws, 2)} ${textContent.drawsUnit || "tirages"}`} />
                </div>
              </div>
              <div className="rng-simulator-cost-column">
                <label className="rng-simulator-field rng-simulator-cost-field">
                  <span>{textContent.costPerDrawLabel || "Coût d'un tirage"}</span>
                  <input className="nds-input" data-size="sm" type="number" step="any" value={costDraft ?? activeRate.costPerDraw ?? ""} onChange={(event) => updateCost(event.target.value)} onBlur={blurCost} placeholder={textContent.costPerDrawPlaceholder || "Optionnel"} />
                </label>
                <RngStat label={textContent.averageCostLabel || "Coût moyen avant réussite"} value={formatCost(costSummary?.averageSuccessCost)} />
              </div>
            </div>
          ) : <p className="rng-simulator-empty">{textContent.emptySummary || "Ajoutez un taux pour afficher les calculs."}</p>}
        </section>

        <section className="rng-simulator-panel rng-simulator-tabs-panel">
          <header>
            <Tabs tabs={tabs} activeTab={activeTab} onChange={setActiveTab} className="rng-simulator-tabs" />
          </header>

          {activeTab === "forecasts" && (
            <div className="rng-simulator-tab-content">
              {activeRate && summary ? (
                <>
                  <div className="rng-simulator-section">
                    <span className="rng-simulator-section-title">{textContent.averageTimeTitle || "Temps moyen avant réussite"}</span>
                    <div className="rng-simulator-occurrence-control">
                      <label className="rng-simulator-field">
                        <span>{textContent.occurrenceCountLabel || "Nombre d'occurrences"}</span>
                        <input className="nds-input" data-size="sm" type="number" step="any" value={occurrenceDraft ?? String(activeRate.occurrenceValue ?? 0)} onChange={(event) => updateOccurrence(event.target.value)} onBlur={blurOccurrence} />
                      </label>
                      <label className="rng-simulator-field">
                        <span>{textContent.periodLabel || "Période"}</span>
                        <select className="nds-select" data-size="sm" value={occurrenceUnit} onChange={(event) => changeOccurrenceUnit(event.target.value)}>
                          <option value="perHour">{textContent.perHourLabel || "Par heure"}</option>
                          <option value="perDay">{textContent.perDayLabel || "Par jour"}</option>
                        </select>
                      </label>
                    </div>
                    <div className="rng-simulator-time-results">
                      <RngStat label={textContent.hourTimeLabel || "En heures"} value={formatTime(summary.timeByFrequency.hour, textContent.hoursUnit || "h")} />
                      <RngStat label={textContent.dayTimeLabel || "En jours"} value={formatTime(summary.timeByFrequency.day, textContent.daysUnit || "j")} />
                    </div>
                  </div>

                  <div className="rng-simulator-section">
                    <span className="rng-simulator-section-title">{textContent.durationChancesTitle || "Chances selon une durée"}</span>
                    <div className="rng-simulator-duration-grid">
                      {(summary.durationChances || RNG_SIMULATOR_HOURLY_DURATION_PRESETS).map((preset) => (
                        <RngStat
                          key={preset.id}
                          label={`${textContent.durationChancePrefix || "Après"} ${preset.label}`}
                          value={formatPercent((preset.chance || 0) * 100, 6)}
                          title={`${formatNumber(preset.draws || 0, 2)} ${textContent.drawsUnit || "tirages"}`}
                        />
                      ))}
                    </div>
                  </div>

                  <div className="rng-simulator-section">
                    <span className="rng-simulator-section-title">{textContent.chanceTargetsTitle || "Tirages pour atteindre une chance cumulée"}</span>
                    <div className="rng-simulator-table rng-simulator-target-table">
                      <span className="rng-simulator-table-heading">{textContent.chanceLabel || "Chance"}</span>
                      <span className="rng-simulator-table-heading">{textContent.drawsUnit || "Tirages"}</span>
                      <span className="rng-simulator-table-heading">{textContent.costLabel || "Coût"}</span>
                      {CHANCE_TARGETS.map((target) => (
                        <RngTargetRow costSummary={costSummary} draws={summary.drawsForChance[target]} key={target} target={target} textContent={textContent} />
                      ))}
                    </div>
                  </div>
                </>
              ) : <p className="rng-simulator-empty">{textContent.emptySummary || "Ajoutez un taux pour afficher les calculs."}</p>}
            </div>
          )}

          {activeTab === "simulation" && (
            <div className="rng-simulator-tab-content">
              <div className="rng-simulator-simulation-overview">
                <div className="rng-simulator-simulation-actions">
                  <label className="rng-simulator-field rng-simulator-inline-field rng-simulator-simulation-draws">
                    <span>{textContent.simulationDrawsLabel || "Tirages simulés"}</span>
                    <input className="nds-input" data-size="sm" type="number" min="1" max={RNG_SIMULATOR_LIMITS.simulationDrawsMax} step="1" value={data.settings.simulationDraws} onChange={(event) => updateSettings("simulationDraws", event.target.value)} />
                  </label>
                  <button className="nds-button" data-size="sm" data-variant="primary" type="button" onClick={runSimulation} disabled={!activeRate}>
                    <Icon name="play-circle" />
                    <span>{textContent.simulateButton || "Simuler"}</span>
                  </button>
                </div>
                {activeRate && summary && (
                  <div className="rng-simulator-simulation-summary">
                    <RngStat label={textContent.simulationChanceLabel || "Chance sur les tirages saisis"} value={formatPercent(summary.chanceForSimulationDraws * 100, 6)} />
                    <RngStat label={textContent.simulationChanceWithoutMultiplierLabel || "Chance sur les tirages saisis sans multiplicateur"} value={formatPercent(chanceWithoutMultiplier * 100, 6)} />
                  </div>
                )}
              </div>
              <div className="rng-simulator-history-toolbar">
                <button className="nds-button" data-size="sm" data-variant="danger" type="button" onClick={clearHistory} disabled={!activeHistory.length}>
                  <Icon name="rubber" />
                  <span>{textContent.clearHistoryButton || "Supprimer les simulations"}</span>
                </button>
              </div>
              <div className="rng-simulator-history nds-scrollbox">
                {activeHistory.length ? activeHistory.map((entry, index) => (
                  <RngHistoryRow entry={entry} index={index} key={entry.id} textContent={textContent} />
                )) : <p className="rng-simulator-empty">{textContent.emptyHistory || "Aucune simulation."}</p>}
              </div>
            </div>
          )}

          {activeTab === "tracking" && (
            <div className="rng-simulator-tab-content">
              {activeRate && summary && realDrawsSummary ? (
                <>
                  <div className="rng-simulator-section">
                    <div className="rng-simulator-tracking-control">
                      <label className="rng-simulator-field">
                        <span>{textContent.realDrawsLabel || "Tirages effectués"}</span>
                        <input className="nds-input" data-size="sm" type="number" min="0" max={RNG_SIMULATOR_LIMITS.realDrawsMax} step="1" value={realDrawsDraft ?? String(activeRate.realDraws ?? 0)} onChange={(event) => updateRealDraws(event.target.value)} onBlur={blurRealDraws} />
                      </label>
                    </div>
                    <div className="rng-simulator-tracking-grid">
                      <RngStat label={`${textContent.realCumulativeChanceLabel || "Chance d'avoir déjà réussi"} ${textContent.afterDrawsPrefix || "après"} ${formatNumber(realDrawsSummary.realDraws, 0)} ${textContent.drawsUnit || "tirages"}`} value={formatPercent(realDrawsSummary.cumulativeChance * 100, 6)} />
                      <RngStat label={textContent.averagePositionLabel || "Position vs moyenne"} tone={realDrawsSummary.averagePosition.tone} value={getAveragePositionLabel(realDrawsSummary.averagePosition, textContent)} />
                      <RngStat label={realDrawsSummary.averageExceeded ? textContent.averageExceededLabel || "Moyenne dépassée" : textContent.drawsUntilAverageLabel || "Tirages avant moyenne"} tone={averageDrawsTone} value={realDrawsSummary.averageExceeded ? `${formatNumber(averageExceededDraws, 0)} ${textContent.drawsUnit || "tirages"}` : `${formatNumber(realDrawsSummary.drawsUntilAverage, 0)} ${textContent.drawsUnit || "tirages"}`} />
                      <RngStat label={textContent.averageCostDeltaLabel || "Écart au coût moyen"} tone={realDrawsSummary.averageCostDelta > 0 ? "negative" : realDrawsSummary.averageCostDelta < 0 ? "positive" : ""} value={realDrawsSummary.hasCost ? formatSignedCost(realDrawsSummary.averageCostDelta) : "—"} />
                    </div>
                  </div>

                  <div className="rng-simulator-section">
                    <span className="rng-simulator-section-title">{textContent.trackingTargetsTitle || "Progression vers les chances cumulées"}</span>
                    <div className="rng-simulator-table rng-simulator-tracking-target-table">
                      <span className="rng-simulator-table-heading">{textContent.chanceLabel || "Chance"}</span>
                      <span className="rng-simulator-table-heading">{textContent.trackingProgressLabel || "Progression"}</span>
                      <span className="rng-simulator-table-heading">{textContent.remainingDrawsLabel || "Tirages restants"}</span>
                      <span className="rng-simulator-table-heading">{textContent.remainingCostLabel || "Coût restant"}</span>
                      {CHANCE_TARGETS.map((target) => (
                        <RngTrackingTargetRow hasCost={realDrawsSummary.hasCost} key={target} target={target} targetSummary={realDrawsSummary.targets[target]} textContent={textContent} />
                      ))}
                    </div>
                  </div>
                </>
              ) : <p className="rng-simulator-empty">{textContent.emptySummary || "Ajoutez un taux pour afficher les calculs."}</p>}
            </div>
          )}
        </section>
      </div>
    </>
  );
}

function RngInfo({ label, value }) {
  return (
    <span>
      <small>{label}</small>
      <strong>{value}</strong>
    </span>
  );
}

function RngStat({ label, tone = "", value, title }) {
  return (
    <article className="rng-simulator-stat" data-tone={tone || undefined} title={title}>
      <span>{label}</span>
      <strong>{value}</strong>
    </article>
  );
}

function RngTargetRow({ costSummary, draws, target, textContent }) {
  return (
    <>
      <strong className="rng-simulator-chance-value">{target} %</strong>
      <span title={`${formatNumber(draws, 0)} ${textContent.drawsUnit || "tirages"}`}>{formatDrawTarget(draws, textContent.drawsUnit || "tirages")}</span>
      <span>{formatCost(costSummary?.targetCosts?.[target])}</span>
    </>
  );
}

function RngTrackingTargetRow({ hasCost, target, targetSummary, textContent }) {
  return (
    <>
      <strong className="rng-simulator-chance-value">{target} %</strong>
      <span>{formatPercent((targetSummary?.progress || 0) * 100, 2)}</span>
      <span title={`${formatNumber(targetSummary?.remainingDraws || 0, 0)} ${textContent.drawsUnit || "tirages"}`}>{formatDrawTarget(targetSummary?.remainingDraws || 0, textContent.drawsUnit || "tirages")}</span>
      <span>{hasCost ? formatCost(targetSummary?.remainingCost) : "—"}</span>
    </>
  );
}

function RngHistoryMetric({ label, tone = "", value }) {
  return (
    <span data-tone={tone || undefined}>
      <small>{label}</small>
      <b>{value}</b>
    </span>
  );
}

function RngHistoryRow({ entry, index, textContent }) {
  const expectedSuccesses = entry.draws * (getEffectiveRate(entry.rate, entry.multiplier) / 100);
  const successDelta = entry.successes - expectedSuccesses;
  const successTone = getToneFromDelta(successDelta);
  const luckLabel = successDelta > 0
    ? textContent.luckySimulationLabel || "Au-dessus"
    : successDelta < 0
      ? textContent.unluckySimulationLabel || "Sous l'attendu"
      : textContent.neutralSimulationLabel || "Dans la cible";
  const costs = calculateRngCostSummary({
    costPerDraw: entry.costPerDraw,
    averageDraws: 0,
    drawsForChance: {},
    simulationDraws: entry.draws,
    simulationSuccesses: entry.successes,
    firstSuccessDraw: entry.firstSuccessDraw
  });
  const hasFirstSuccessCost = entry.firstSuccessDraw > 0 && Number.isFinite(costs?.simulationFirstSuccessCost) && costs.simulationFirstSuccessCost > 0;
  const hasCostPerSuccess = entry.successes > 0 && Number.isFinite(costs?.simulationCostPerSuccess) && costs.simulationCostPerSuccess > 0;
  return (
    <article className={`rng-simulator-history-row ${index === 0 ? "is-latest" : ""}`}>
      <div className="rng-simulator-history-heading">
        <div className="rng-simulator-history-identity" data-tone={successTone || undefined}>
          <strong>{entry.label}</strong>
          <small>{luckLabel} · {formatSignedPercent((successDelta / entry.draws) * 100, 4)}</small>
        </div>
        <div className="rng-simulator-history-score" data-tone={entry.successes > 0 ? "positive" : undefined}>
          <b>{entry.successes}</b>
          <small>{textContent.successesLabel || "Réussites"}</small>
        </div>
        <div className="rng-simulator-history-rate">
          <span>{entry.rate} %</span>
          <small>{textContent.multiplierShortLabel || "Bonus"} {formatSignedPercent(entry.multiplier ?? 0)}</small>
        </div>
      </div>
      <div className="rng-simulator-history-metrics">
        <RngHistoryMetric label={textContent.successesLabel || "Réussites"} tone={entry.successes > 0 ? "positive" : ""} value={`${entry.successes}/${entry.draws}`} />
        <RngHistoryMetric label={textContent.failsLabel || "Fails"} tone={entry.fails > 0 ? "negative" : ""} value={entry.fails} />
        <RngHistoryMetric label={textContent.observedRateLabel || "Taux de réussite"} tone={successTone} value={formatPercent((entry.successes / entry.draws) * 100, 6)} />
        <RngHistoryMetric label={textContent.expectedSuccessesLabel || "Réussites attendues"} value={formatNumber(expectedSuccesses, 2)} />
        <RngHistoryMetric label={textContent.longestFailStreakLabel || "Pire série d'échec"} tone={entry.longestFailStreak > 0 ? "negative" : ""} value={entry.longestFailStreak} />
        <RngHistoryMetric label={textContent.longestSuccessStreakLabel || "Réussite consécutive"} tone={entry.longestSuccessStreak > 0 ? "positive" : ""} value={entry.longestSuccessStreak} />
        <RngHistoryMetric label={textContent.firstSuccessCostLabel || "Coût de la 1ere réussite"} tone={hasFirstSuccessCost ? "negative" : ""} value={entry.firstSuccessDraw > 0 ? formatCost(costs?.simulationFirstSuccessCost) : "—"} />
        <RngHistoryMetric label={textContent.costPerSuccessLabel || "Coût moyen/réussite"} tone={hasCostPerSuccess ? "negative" : ""} value={entry.successes > 0 ? formatCost(costs?.simulationCostPerSuccess) : "—"} />
      </div>
    </article>
  );
}