export interface User {
  id: string;
  fullName: string;
  email: string;
  role: 'ADMIN' | 'USER';
  isActive: boolean;
  defaultCurrency: string;
  reportPreferences?: ReportPreferences;
  createdAt: string;
}

export interface Category {
  id: string;
  name: string;
  color: string;
  isSystem: boolean;
  ownerId: string | null;
}

export interface Merchant {
  id: string;
  name: string;
  kind: 'MERCHANT' | 'SERVICE_PROVIDER' | 'OTHER';
  notes: string | null;
  isActive: boolean;
  createdAt: string;
  updatedAt: string;
}

export interface Proof {
  id: string;
  type: 'RECEIPT' | 'INVOICE' | 'NOTE' | 'BANK_STATEMENT' | 'OTHER';
  label: string | null;
  note: string | null;
  originalName: string | null;
  mimeType: string | null;
  fileSize: number | null;
  fileUrl: string | null;
  createdAt: string;
}

export type ExpenseStatus = 'DRAFT' | 'PENDING' | 'APPROVED' | 'REJECTED';
export type DuplicateStatus = 'OPEN' | 'CONFIRMED' | 'DISMISSED';

export interface Expense {
  id: string;
  title: string;
  description: string | null;
  amount: number;
  expenseDate: string;
  merchant: string | null;
  paymentMethod: 'CARD' | 'CASH' | 'TRANSFER' | 'BLIK' | 'OTHER' | null;
  currency: string;
  status: ExpenseStatus;
  tags: string[];
  customFields: Record<string, string>;
  possibleDuplicate: boolean;
  duplicateStatus: DuplicateStatus | null;
  duplicateReviewedAt: string | null;
  recurringSourceId: string | null;
  category: Category;
  proofs: Proof[];
  createdAt: string;
  updatedAt: string;
}

export interface DuplicateGroup {
  source: Expense;
  matches: Expense[];
}

export interface StatsResponse {
  total: number;
  count: number;
  average: number;
  topCategory: { categoryId: string; categoryName: string; total: number; count: number } | null;
  byCategory: Array<{ categoryId: string; categoryName: string; total: number; count: number }>;
  timeline: Array<{ label: string; total: number }>;
  byTag?: Array<{ tag: string; total: number }>;
  byStatus?: Array<{ status: string; count: number }>;
}

export interface CashflowResponse {
  currentMonth: string;
  actualCurrent: number;
  totalBudget: number;
  budgetUsagePercent: number;
  duplicateCount: number;
  pendingApproval: number;
  forecastCurrentMonth: number;
  trend: Array<{ label: string; actual: number; budget: number }>;
  alerts: Array<{ id: string; name: string; usagePercent: number; spent: number; amount: number }>;
  upcomingRecurring: Array<{ id: string; title: string; amount: number; nextRunDate: string; frequency: string }>;
  statusSummary: Array<{ status: string; count: number }>;
}

export interface Budget {
  id: string;
  month: string;
  name: string | null;
  amount: number;
  spent: number;
  usagePercent: number;
  alertLevel: number | null;
  alertThresholds: number[];
  isActive: boolean;
  category: Category | null;
  createdAt: string;
  updatedAt: string;
}

export interface BudgetListResponse {
  month: string;
  items: Budget[];
  summary: {
    totalBudget: number;
    totalSpent: number;
    alerts: Array<{ budgetId: string; message: string; usagePercent: number; level: number }>;
  };
}

export interface RecurringExpense {
  id: string;
  title: string;
  description: string | null;
  amount: number;
  merchant: string | null;
  paymentMethod: 'CARD' | 'CASH' | 'TRANSFER' | 'BLIK' | 'OTHER' | null;
  currency: string;
  frequency: 'WEEKLY' | 'MONTHLY' | 'YEARLY';
  intervalValue: number;
  startDate: string;
  nextRunDate: string;
  lastRunDate: string | null;
  endDate: string | null;
  maxOccurrences: number | null;
  generatedCount: number;
  defaultStatus: 'DRAFT' | 'PENDING';
  tags: string[];
  customFields: Record<string, string>;
  isActive: boolean;
  category: Category;
  createdAt: string;
  updatedAt: string;
}

export interface AppSettings {
  id: string;
  appName: string;
  defaultCurrency: string;
  registrationEnabled: boolean;
  allowedProofTypes: string[];
  uiPreferences: Record<string, string | number | boolean>;
  smtpEnabled: boolean;
  smtpHost: string | null;
  smtpPort: number;
  smtpSecure: boolean;
  smtpUser: string | null;
  smtpPassword: string | null;
  smtpFromName: string | null;
  smtpFromEmail: string | null;
  createdAt: string;
  updatedAt: string;
}

export interface ReportPreferences {
  enabled: boolean;
  frequency: 'monthly' | 'yearly' | 'threshold';
  thresholdAmount: number;
  sendToEmail: string | null;
  categoryIds: string[];
}

export interface ShoppingListIntegrationSettings {
  enabled: boolean;
  baseUrl: string;
  hasToken: boolean;
  authMode: 'bearer' | 'x-api-token' | 'both';
  ownerId: string | null;
  defaultListId: string | null;
}

export interface ShoppingListSummary {
  total?: number;
  amount?: number;
  count?: number;
  records?: number;
  meta?: { total_amount?: number; total_count?: number; returned_count?: number; [key: string]: unknown };
  lists?: Array<{ id?: string | number; title?: string; name?: string; total_amount?: number; total?: number; expense_count?: number; count?: number }>;
  totals?: Array<{ list_id?: string | number; listId?: string | number; name?: string; total?: number; amount?: number; count?: number }>;
  aggregates?: Array<{ list_id?: string | number; listId?: string | number; name?: string; total?: number; amount?: number; count?: number }>;
  [key: string]: unknown;
}

export interface ShoppingListRef {
  id: string | number;
  name?: string;
  title?: string;
  created_at?: string;
  categories?: string[];
  owner_id?: string | number;
  ownerId?: string | number;
  owner?: { id?: string | number; username?: string; name?: string; fullName?: string; email?: string };
  is_active?: boolean;
  is_archived?: boolean;
  [key: string]: unknown;
}

export interface ShoppingListExpenseItem {
  id?: string | number;
  expense_id?: string | number;
  title?: string;
  name?: string;
  amount?: number;
  total?: number;
  created_at?: string;
  added_at?: string;
  expense_date?: string;
  receipt_filename?: string;
  list?: ShoppingListRef;
  owner?: { id?: string | number; username?: string; name?: string; fullName?: string; email?: string };
  [key: string]: unknown;
}


export interface AdminSystemInfo {
  appName: string;
  suiteVersion: string;
  apiVersion: string;
  webVersion: string;
  nodeVersion: string;
  environment: string;
  database: string;
  uploadDir: string;
  registrationEnabled: boolean;
  smtpConfigured: boolean;
  counters: {
    users: number;
    expenses: number;
    categories: number;
    merchants: number;
    budgets: number;
    recurring: number;
    shoppingIntegrations: number;
  };
  sources: {
    appRepository: string;
    shoppingListRepository: string;
    apiBasePath: string;
  };
  checkedAt: string;
}

export interface ShoppingListTemplate {
  id: string;
  name?: string;
  title?: string;
  [key: string]: unknown;
}