import type { AuthUser } from "@/auth/types";
import { getPositionKeys } from "@/lib/permissions";

/** One overview composition. Every backoffice user lands on exactly one of these. */
export type OverviewLayoutKey =
  | "executive"
  | "operation"
  | "occ"
  | "marketer"
  | "finance"
  | "clearance";

export const OVERVIEW_LAYOUT_LABEL: Record<OverviewLayoutKey, string> = {
  executive: "Executive dashboard",
  operation: "Operations dashboard",
  occ: "Control centre dashboard",
  marketer: "Marketing dashboard",
  finance: "Finance dashboard",
  clearance: "Clearance & logistics dashboard",
};

/**
 * Position/role key → layout, in match priority order: a user holding several
 * of these keys gets the first match, so the specific operational view wins
 * over the broad executive one. Roles are matched alongside positions because
 * the IAM payload models the GL desks as positions (`ethiopian_gl`) on some
 * accounts and as roles (`edr_gl_ethiopia`) on others — see `getPositionKeys`.
 *
 * The `edr_freight_app/…` keys are the org's real position keys (root desks and
 * their sub-positions) as configured under Unit → Departments. They are typed
 * by hand in the Add/Edit Department form, so a new sub-position appears here
 * only once someone adds it — unmapped keys fall through to `executive`.
 */
const ROLE_LAYOUTS: Array<[key: string, layout: OverviewLayoutKey]> = [
  // ── Clearance & logistics: both GL desks, root and sub-positions ──────────
  ["ethiopian_gl", "clearance"],
  ["edr_freight_app/gl_003", "clearance"], // Ethiopian GL Chief
  ["edr_freight_app/off_001", "clearance"], // Ethiopian GL Director
  ["edr_freight_app/off_0056", "clearance"], // Ethiopian GL Officer
  ["djibouti_gl", "clearance"],
  ["edr_freight_app/dj_gl_001", "clearance"], // Djibouti GL Director
  ["edr_freight_app/dj_gl_002", "clearance"], // Djibouti GL Chief
  ["edr_freight_app/dj_gl_003", "clearance"], // Djibouti GL Officer
  ["edr_gl_ethiopia", "clearance"], // legacy role form
  ["edr_gl_djibouti", "clearance"], // legacy role form

  // ── Control centre ───────────────────────────────────────────────────────
  ["edr_freight_app/occ_001", "occ"], // OCC
  ["edr_freight_app/occ_005", "occ"], // OCC Director
  ["edr_line_staff", "occ"], // legacy role form

  // ── Operations: operations desk, track & machinery, rolling stock ─────────
  ["edr_freight_app/opn", "operation"], // Operation
  ["edr_freight_app/opcf", "operation"], // Operation Chief
  ["edr_freight_app/opdr", "operation"], // Operation Director
  ["edr_freight_app/opco", "operation"], // Operation Officer
  ["edr_freight_app/opp_005", "operation"], // Operation Dispatcher
  ["edr_freight_app/opp_0067", "operation"], // Gelan Operation Director
  ["edr_freight_app/track_001", "operation"], // Track And Machinery
  ["edr_freight_app/ttk_001", "operation"], // Track Director
  ["edr_freight_app/tto_001", "operation"], // Track Operator
  ["edr_freight_app/rool_001", "operation"], // Rolling Stock
  ["edr_freight_app/rl_003", "operation"], // Rolling Stock Director
  ["edr_freight_app/rl_009", "operation"], // Rolling Stock Team Lead
  ["edr_freight_app/rl_0090", "operation"], // Rolling Stock Dispatcher
  ["operation", "operation"],
  ["operations_chief", "operation"],
  ["dispatcher", "operation"],
  ["truck_machinery_chief", "operation"],
  ["edr_operations_officer", "operation"], // legacy role form

  // ── Marketing ────────────────────────────────────────────────────────────
  ["edr_freight_app/edr_test_org_0022", "marketer"], // Commercial Marketing
  ["edr_freight_app/edr_test_org_00567", "marketer"], // Marketing Director
  ["edr_freight_app/edr_test_org_0054", "marketer"], // Marketing Chief
  ["edr_freight_app/edr_test_org_0013", "marketer"], // Marketing Officer
  ["marketer", "marketer"],
  ["edr_marketing", "marketer"], // legacy role form

  // ── Finance ──────────────────────────────────────────────────────────────
  ["edr_freight_app/finance", "finance"],
  ["edr_finance", "finance"], // legacy role form

  // ── Executive: org-wide desks with no operational queue of their own ──────
  ["ceo", "executive"],
  ["director", "executive"],
  ["chief", "executive"],
  ["edr_ceo", "executive"], // legacy role form
  ["edr_director", "executive"], // legacy role form
  ["edr_org_manager", "executive"], // legacy role form
];

/** Unmapped keys (superadmin, IAM admins, Safety, new positions) keep the executive layout. */
export function resolveOverviewLayout(
  user: AuthUser | null | undefined,
): OverviewLayoutKey {
  const held = new Set(getPositionKeys(user));
  return ROLE_LAYOUTS.find(([key]) => held.has(key))?.[1] ?? "executive";
}