import { AccountStatus } from './services/auth/auth.constants';

export interface CouchDBDocument {
  _id: string;
  _rev: string;
}

export enum UserRole {
  USER = 'USER',
  ADMIN = 'ADMIN',
}

export interface User extends CouchDBDocument {
  username: string;
  avatar?: string; // Base64 encoded image
  email?: string;
  password?: string; // For email-based authentication
  emailVerified?: boolean;
  status?: AccountStatus; // Account status: PENDING, ACTIVE, SUSPENDED
  role?: UserRole; // User role for admin functionality
  createdAt?: Date;
  lastLoginAt?: Date;
}

export enum Frequency {
  Daily = 'Daily',
  TwiceADay = 'Twice a day',
  ThreeTimesADay = 'Three times a day',
  EveryXHours = 'Every X hours',
}

export interface Medication extends CouchDBDocument {
  name: string;
  dosage: string;
  frequency: Frequency;
  hoursBetween?: number;
  startTime: string; // "HH:mm" format
  notes?: string;
  icon?: string;
}

export interface Dose {
  id: string; // A unique ID for the dose instance, e.g., `${medicationId}-${isoDate}`
  medicationId: string;
  scheduledTime: Date;
}

export enum DoseStatus {
  UPCOMING = 'UPCOMING',
  TAKEN = 'TAKEN',
  MISSED = 'MISSED',
  SNOOZED = 'SNOOZED',
}

export interface HistoricalDose {
  id: string;
  medication: Medication;
  scheduledTime: Date;
  status: DoseStatus;
  takenAt?: string;
}

export interface UserSettings extends CouchDBDocument {
  notificationsEnabled: boolean;
  hasCompletedOnboarding: boolean;
}

export interface TakenDoses extends CouchDBDocument {
  doses: Record<string, string>; // key: dose.id, value: ISO timestamp
}

export interface CustomReminder extends CouchDBDocument {
  title: string;
  icon: string;
  frequencyMinutes: number;
  startTime: string; // "HH:mm"
  endTime: string; // "HH:mm"
}

// Represents a single occurrence of a custom reminder on a given day
export interface ReminderInstance {
  id: string; // e.g., `${reminderId}-${isoDate}-${time}`
  reminderId: string;
  title: string;
  icon: string;
  scheduledTime: Date;
}

export type ScheduleItem = Dose | ReminderInstance;

export interface DailyStat {
  date: string; // YYYY-MM-DD
  adherence: number; // 0-100
}

export interface MedicationStat {
  medication: Medication;
  taken: number;
  missed: number;
  upcoming: number;
  adherence: number; // 0-100
  lastTakenAt?: string;
}

export enum OAuthProvider {
  GOOGLE = 'google',
  GITHUB = 'github',
}

export interface OAuthState {
  provider: OAuthProvider;
  redirectUri: string;
  state: string;
}