/**
 * Sichtbarkeit für history_overview_viz (sync mit backend dashboard_widget_config).
 * `visibility === undefined` → Verlauf-Tab: volle Gesamtübersicht (wie bisher).
 */

export const HISTORY_OVERVIEW_VIZ_PAGE_FULL = {
  chart_days: 30,
  show_confidence_banner: true,
  show_intro_blurb: true,
  show_area_summaries: true,
  show_correlation_c1_c3: true,
  show_drivers_c4: true,
}

export const HISTORY_OVERVIEW_VIZ_WIDGET_DEFAULTS = {
  chart_days: 30,
  show_confidence_banner: true,
  show_intro_blurb: true,
  show_area_summaries: true,
  show_correlation_c1_c3: true,
  show_drivers_c4: true,
}

const BOOL_KEYS = [
  'show_confidence_banner',
  'show_intro_blurb',
  'show_area_summaries',
  'show_correlation_c1_c3',
  'show_drivers_c4',
]

/**
 * @param {Record<string, unknown>|null|undefined} raw
 */
export function normalizeHistoryOverviewVizConfig(raw) {
  const base = { ...HISTORY_OVERVIEW_VIZ_WIDGET_DEFAULTS }
  if (!raw || typeof raw !== 'object') return base
  for (const k of BOOL_KEYS) {
    if (Object.prototype.hasOwnProperty.call(raw, k)) {
      base[k] = raw[k] === true
    }
  }
  if (raw.chart_days != null) {
    const n = Number(raw.chart_days)
    if (Number.isFinite(n)) {
      base.chart_days = Math.min(90, Math.max(7, Math.round(n)))
    }
  }
  return base
}