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

/** @deprecated Utiliser `getMailNavFolderLabel(inboxTab, folderIdToLabel)` ou `inboxTabDisplayLabel`. */
export const INBOX_CATEGORY_TAB_LABELS: Record<string, string> = {
  primary: "Principale",
  all: "Tous les messages",
}

/** 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 type MailNavBreadcrumbItem = {
  label: string
  visitKey: string
}

export function getMailNavFolderBreadcrumbItems(
  folderId: string,
  folderTree: FolderTreeNode[],
  folderIdToLabel?: Record<string, string>,
  inboxCategory?: { tabId: string; label: string } | null
): MailNavBreadcrumbItem[] {
  if (folderId === "inbox") {
    const base = getMailNavFolderLabel(folderId, folderIdToLabel)
    if (inboxCategory && inboxCategory.label !== "Principale") {
      return [
        { label: base, visitKey: mailNavVisitKey("inbox") },
        {
          label: inboxCategory.label,
          visitKey: mailNavVisitKey("inbox", inboxCategory.tabId),
        },
      ]
    }
    return [{ label: base, visitKey: mailNavVisitKey(folderId) }]
  }

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

  return [
    {
      label: getMailNavFolderLabel(folderId, folderIdToLabel),
      visitKey: folderId,
    },
  ]
}

export function getMailNavFolderBreadcrumbSegments(
  folderId: string,
  folderTree: FolderTreeNode[],
  folderIdToLabel?: Record<string, string>,
  inboxCategoryLabel?: string | null,
  inboxTabId?: string | null
): string[] {
  const inboxCategory =
    folderId === "inbox" &&
    inboxTabId &&
    inboxCategoryLabel &&
    inboxCategoryLabel !== "Principale"
      ? { tabId: inboxTabId, label: inboxCategoryLabel }
      : null
  return getMailNavFolderBreadcrumbItems(
    folderId,
    folderTree,
    folderIdToLabel,
    inboxCategory
  ).map((i) => i.label)
}

export function breadcrumbItemsForVisitKey(
  key: string,
  folderTree: FolderTreeNode[],
  folderIdToLabel?: Record<string, string>,
  labelRows: readonly LabelRowItem[] = defaultNavLabelRowsSnapshot
): MailNavBreadcrumbItem[] {
  const { folderId, inboxTab } = parseMailNavVisitKey(key)
  const inboxCategory =
    folderId === "inbox" && inboxTab && inboxTab !== "primary"
      ? {
          tabId: inboxTab,
          label: inboxTabDisplayLabel(
            inboxTab,
            labelRows,
            folderIdToLabel ?? {}
          ),
        }
      : null
  return getMailNavFolderBreadcrumbItems(
    folderId,
    folderTree,
    folderIdToLabel,
    inboxCategory
  )
}

export function breadcrumbSegmentsForVisitKey(
  key: string,
  folderTree: FolderTreeNode[],
  folderIdToLabel?: Record<string, string>,
  labelRows?: readonly LabelRowItem[]
): string[] {
  return breadcrumbItemsForVisitKey(
    key,
    folderTree,
    folderIdToLabel,
    labelRows
  ).map((i) => i.label)
}

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