import {
  DRAWERS,
  NICHE,
  PLINTH,
  MAX_PANEL_DIMENSION_MM,
  MAX_PANEL_SHORT_SIDE_MM,
  validateHorizontalSpans
} from '../../shared/manufacturing.js';

export function validateConfig(config = {}, settings = {}) {
  const errors = [];
  const warnings = [];

  const installationType = config.installationType || 'free';
  const doorType = config.doorType || 'hinged';
  const widthMm = Number(config.widthMm || 0);
  const heightMm = Number(config.heightMm || 0);
  const depthMm = Number(config.depthMm || 0);
  const modules = Array.isArray(config.modules) ? config.modules : [];
  const allowSliding = String(settings.allow_sliding_doors ?? '0') === '1';
  const sanitaryGapMm = Number(settings.sanitary_gap_mm || NICHE.sanitaryGapAround);
  const plinthHeightMm = Number(config.plinthHeightMm ?? 100);
  const maxPanelLongMm = Number(
    settings.panel_max_width_mm ??
    settings.max_panel_width_mm ??
    settings.max_panel_dimension_mm ??
    MAX_PANEL_DIMENSION_MM
  );
  const maxPanelShortMm = Number(
    settings.panel_max_short_side_mm ??
    settings.max_panel_short_side_mm ??
    MAX_PANEL_SHORT_SIDE_MM
  );

  if (widthMm > maxPanelLongMm) {
    errors.push({
      field: 'widthMm',
      message: `Largeur maximale ${maxPanelLongMm} mm (capacité CNC).`
    });
  }
  if (depthMm > maxPanelShortMm) {
    errors.push({
      field: 'depthMm',
      message: `Profondeur maximale ${maxPanelShortMm} mm (capacité CNC).`
    });
  }

  if (config.horizontalSpans != null && !Array.isArray(config.horizontalSpans)) {
    errors.push({
      field: 'horizontalSpans',
      message: 'Les traverses horizontales doivent être fournies sous forme de tableau.'
    });
  } else {
    validateHorizontalSpans(config, { maxPanelWidthMm: maxPanelLongMm }).forEach((issue) => {
      errors.push({
        field: issue.field,
        code: issue.code,
        message: issue.message
      });
    });
  }

  if (!PLINTH.targetHeightsMm.includes(plinthHeightMm)) {
    errors.push({
      field: 'plinthHeightMm',
      message: `Hauteur AXILO 78 invalide. Valeurs admises : ${PLINTH.targetHeightsMm.join(', ')} mm.`
    });
  }

  if (doorType === 'sliding' && !allowSliding) {
    errors.push({ field: 'doorType', message: 'Portes coulissantes désactivées.' });
  }

  if (installationType === 'niche') {
    const nm = config.nicheMeasurements || {};
    const minW = Math.min(nm.widthTopMm || widthMm, nm.widthMidMm || widthMm, nm.widthBottomMm || widthMm);
    const minD = Math.min(nm.depthTopMm || depthMm, nm.depthMidMm || depthMm, nm.depthBottomMm || depthMm);
    const minH = Math.min(nm.heightLeftMm || heightMm, nm.heightRightMm || heightMm);
    const expectedW = Math.max(400, minW - sanitaryGapMm * 2);
    const expectedD = Math.max(400, minD - sanitaryGapMm * 2);
    const expectedH = Math.max(1800, minH - sanitaryGapMm * 2);
    if (Math.abs(expectedW - widthMm) > 2 || Math.abs(expectedD - depthMm) > 2 || Math.abs(expectedH - heightMm) > 2) {
      errors.push({ field: 'nicheMeasurements', message: 'Dimensions niche incohérentes avec les mesures mini et vide sanitaire.' });
    }
  }

  const drawerDepthMin = Number(settings.drawer_depth_min_mm || DRAWERS.minDepth);
  const drawerDepthMax = Number(settings.drawer_depth_max_mm || DRAWERS.maxDepth);
  const drawerDepthStep = Number(settings.drawer_depth_step_mm || DRAWERS.depthStep);

  /** Même logique que `useWardrobeConfig` : pas de 50 mm sur la profondeur utile, puis réserve tiroir caché. */
  const inferredEffectiveDrawerDepthMm = (drawerType = config.hardware?.drawerType || 'visible') => {
    const rawGap = depthMm - NICHE.drawerBackGap;
    const clamped = Math.max(drawerDepthMin, Math.min(drawerDepthMax, rawGap));
    const steppedMm = Math.round(clamped / drawerDepthStep) * drawerDepthStep;
    const depthReductionMm =
      drawerType === 'hidden' || drawerType === 'hidden_with_handle' ? DRAWERS.hiddenHandleDepthReduction : 0;
    return Math.max(350, steppedMm - depthReductionMm);
  };

  for (const [index, m] of modules.entries()) {
    const isDrawerCol = (m.drawers || 0) > 0 || m.type === 'tiroirs';
    if (isDrawerCol && Number(m.widthMm || 0) > DRAWERS.maxColumnWidth) {
      errors.push({ field: `modules[${index}]`, message: `Colonne tiroirs > ${DRAWERS.maxColumnWidth} mm.` });
    }
    if (m.hasRod && heightMm < 1200) {
      errors.push({ field: `modules[${index}]`, message: 'Tringle autorisée à partir de 1200 mm de hauteur armoire.' });
    }
    if (isDrawerCol) {
      const moduleDepth = inferredEffectiveDrawerDepthMm(m.drawerType ?? config.hardware?.drawerType);
      if (moduleDepth < 350 || moduleDepth > drawerDepthMax) {
        errors.push({
          field: `modules[${index}].drawerType`,
          message: `Profondeur tiroir utile hors bornes (350-${drawerDepthMax} mm) pour ce block.`
        });
      }
    }
  }

  /**
   * Profondeur utile tiroir — alignée sur useWardrobeConfig (pas de 50 sur prof. caisse puis −40 si caché).
   * Ne pas exiger un multiple de 50 sur la valeur finale : ex. 550 − 40 = 510 mm est valide.
   */
  const drawerModules = modules.filter((m) => (m.drawers || 0) > 0 || m.type === 'tiroirs');
  const canonicalDrawerDepths = drawerModules.map((m) =>
    inferredEffectiveDrawerDepthMm(m.drawerType ?? config.hardware?.drawerType)
  );
  const canonicalEffectiveDrawerDepthMm =
    canonicalDrawerDepths[0] ?? inferredEffectiveDrawerDepthMm();
  const effectiveDrawerMinMm = 350;
  if (
    canonicalEffectiveDrawerDepthMm < effectiveDrawerMinMm ||
    canonicalEffectiveDrawerDepthMm > drawerDepthMax
  ) {
    errors.push({
      field: 'effectiveDrawerDepthMm',
      message: `Profondeur tiroir utile hors bornes (${effectiveDrawerMinMm}-${drawerDepthMax} mm) pour cette profondeur caisse.`
    });
  }

  const explicitEff = Number(config.effectiveDrawerDepthMm);
  if (
    Number.isFinite(explicitEff) &&
    explicitEff > 0 &&
    canonicalDrawerDepths.every((depth) => depth === canonicalEffectiveDrawerDepthMm) &&
    Math.abs(explicitEff - canonicalEffectiveDrawerDepthMm) > 2
  ) {
    warnings.push({
      field: 'effectiveDrawerDepthMm',
      message:
        `Valeur stockée (${explicitEff} mm) différente du calcul attendu (${canonicalEffectiveDrawerDepthMm} mm) — le serveur utilise le calcul canonique.`
    });
  }

  const handleAxis = Number(config.hardware?.handleBoreHeightMm || 1000);
  const stdAxis = Number(settings.standard_handle_axis_mm || 1000);
  const tolerance = Number(settings.standard_handle_tolerance_mm || 200);
  if (handleAxis < stdAxis - tolerance || handleAxis > stdAxis + tolerance) {
    warnings.push({ field: 'handleBoreHeightMm', message: 'Perçage poignée hors plage standard.' });
  }

  return { errors, warnings };
}

export default { validateConfig };