import type { FolderTreeNode } from "@/lib/sidebar-nav-maps"
import { findFolderPath } from "@/lib/sidebar-nav-folder-ids"
import { getMailNavFolderLabel } from "@/lib/sidebar-nav-data"

export const INBOX_CATEGORY_TAB_LABELS: Record<string, string> = {
  primary: "Principale",
  promotions: "Promotions",
  social: "Réseaux sociaux",
  updates: "Notifications",
  forums: "Forums",
}

/** Clé stable pour historique navigation (dossier + onglet boîte de réception). */
export function mailNavVisitKey(folderId: string, inboxTab?: string): string {
  if (folderId === "inbox" && inboxTab && inboxTab !== "primary") {
    return `inbox::${inboxTab}`
  }
  return folderId
}

export function parseMailNavVisitKey(key: string): {
  folderId: string
  inboxTab?: string
} {
  if (key.startsWith("inbox::")) {
    return { folderId: "inbox", inboxTab: key.slice("inbox::".length) }
  }
  return { folderId: key }
}

export function getMailNavFolderBreadcrumbSegments(
  folderId: string,
  folderTree: FolderTreeNode[],
  folderIdToLabel?: Record<string, string>,
  inboxCategoryLabel?: string | null
): string[] {
  if (folderId === "inbox") {
    const base = getMailNavFolderLabel(folderId, folderIdToLabel)
    if (
      inboxCategoryLabel &&
      inboxCategoryLabel !== INBOX_CATEGORY_TAB_LABELS.primary
    ) {
      return [base, inboxCategoryLabel]
    }
    return [base]
  }

  const path = findFolderPath(folderTree, folderId)
  if (path?.length) {
    return path.map((n) => n.label)
  }

  return [getMailNavFolderLabel(folderId, folderIdToLabel)]
}

export function breadcrumbSegmentsForVisitKey(
  key: string,
  folderTree: FolderTreeNode[],
  folderIdToLabel?: Record<string, string>
): string[] {
  const { folderId, inboxTab } = parseMailNavVisitKey(key)
  const cat =
    folderId === "inbox" && inboxTab
      ? INBOX_CATEGORY_TAB_LABELS[inboxTab] ?? inboxTab
      : null
  return getMailNavFolderBreadcrumbSegments(
    folderId,
    folderTree,
    folderIdToLabel,
    cat
  )
}

export function breadcrumbForVisitKey(
  key: string,
  folderTree: FolderTreeNode[],
  folderIdToLabel?: Record<string, string>
): string {
  return breadcrumbSegmentsForVisitKey(key, folderTree, folderIdToLabel).join(
    " · "
  )
}