import type { BookabilityBlocker } from './bookabilityReasons';

// WHO can fix a cause, and WHERE - so a viewer who cannot act is told who can, instead of being handed a link
// they will be denied.
//
// This is the dead end the whole placement decision exists to prevent. HR authors schedules and staff
// services (the fragile heart of the chain) but may hold only VIEW on the organization section - so it will
// routinely see causes it cannot fix. Dangling a link at that user is worse than saying nothing: it wastes a
// click and teaches them the panel is unreliable.
//
// The sections match the dashboard's own nav sections, which is also what `canViewStaffSection` /
// `canManage` are keyed on - so "can I act on this?" is answered with the same vocabulary the app already uses.

export type FixSection = 'organization' | 'staff' | 'schedules';

export interface FixOwner {
  section: FixSection;
  /** Human-facing path, matching the dashboard's own labels. */
  where: string;
}

const ORGANIZATION_SERVICES: FixOwner = {
  section: 'organization',
  where: 'Organization → Healthcare Services',
};
const ORGANIZATION_POLICIES: FixOwner = {
  section: 'organization',
  where: 'Organization → appointment policies',
};
const STAFF_ROLES: FixOwner = { section: 'staff', where: 'Staff → the provider → Roles' };
// Named separately from STAFF_ROLES because the seat is a DIFFERENT tab, and sending somebody to Roles
// for it is the specific dead end this avoids: the guidance named a screen where the
// control is not.
const STAFF_WORKSPACES: FixOwner = {
  section: 'staff',
  where: 'Staff → the provider → Workspaces → Enable as a clinician',
};
const STAFF_SERVICES: FixOwner = { section: 'staff', where: 'Staff → the provider → Services' };
const SCHEDULES: FixOwner = { section: 'schedules', where: 'Schedules → the schedule block' };

const OWNERS: Record<BookabilityBlocker, FixOwner> = {
  ROLE_INACTIVE: STAFF_ROLES,
  NO_CLINICIAN_SEAT: STAFF_WORKSPACES,
  BLOCK_BOOKING_DISABLED: SCHEDULES,
  BLOCK_SELF_BOOKING_DISABLED: SCHEDULES,
  SERVICE_INACTIVE: ORGANIZATION_SERVICES,
  SERVICE_NOT_OFFERED_AT_LOCATION: ORGANIZATION_SERVICES,
  NOT_SELF_BOOKABLE_ORG: ORGANIZATION_SERVICES,
  NOT_SELF_BOOKABLE_PRACTITIONER: STAFF_SERVICES,
  NOT_SELF_BOOKABLE_BLOCK: SCHEDULES,
  PRACTITIONER_NOT_OFFERING_SERVICE: STAFF_SERVICES,
  BLOCK_DOES_NOT_OFFER_SERVICE: SCHEDULES,
  NO_SCHEDULE_AT_LOCATION: SCHEDULES,
  NEW_PATIENT_EXAM_NO_ELIGIBLE_BLOCK: ORGANIZATION_POLICIES,
  BLOCK_NO_HOURS: SCHEDULES,
  BLOCK_NO_PLANNING_HORIZON: SCHEDULES,
  BLOCK_HORIZON_EXPIRED: SCHEDULES,
  // TELEHEALTH'S THREE GATES, EACH OWNED BY THE SCREEN THAT ACTUALLY HOLDS ITS CONTROL. They were added
  // to the blocker union and given patient-facing copy without being given an owner here, so every one
  // of them fell through `fixOwnerFor`'s default and sent the reader to the schedule block - which holds
  // exactly one of the three. Naming a screen where the control is not is the dead end this table exists
  // to prevent, and it is worse than saying nothing.
  //
  // Verified against the running product rather than the design alone: the org toggle is the "Offer
  // video visits" checkbox under Organization -> How this practice takes appointments; per-service video
  // is the practitioner's own "Do you deliver this service by video?" on their Services Offered tab; and
  // the block's is "Also offer this block by video" on the schedule block itself.
  ORG_TELEHEALTH_DISABLED: ORGANIZATION_POLICIES,
  SERVICE_NOT_TELEHEALTH_ELIGIBLE: STAFF_SERVICES,
  NO_VIRTUAL_LOCATION_ON_BLOCK: SCHEDULES,
};

export const fixOwnerFor = (code: BookabilityBlocker): FixOwner => OWNERS[code] ?? SCHEDULES;

export interface FixGuidance {
  /** True when the viewer can go and change it themselves. */
  actionable: boolean;
  text: string;
}

export function fixGuidance(code: BookabilityBlocker, viewerCanManageSection: boolean): FixGuidance {
  const owner = fixOwnerFor(code);
  return viewerCanManageSection
    ? { actionable: true, text: `Change this under ${owner.where}.` }
    : { actionable: false, text: `An administrator can change this under ${owner.where}.` };
}