import 'package:flutter/material.dart';

/// The groups destinations belong to: the main tabs, the ledger screens behind «Операции», and
/// the system ones (Здоровье, Настройки) that sit as icons on the right of the top bar.
enum NavGroup { overview, ledger, system }

class NavDestination {
  const NavDestination(
    this.path,
    this.icon,
    this.selectedIcon,
    this.label,
    this.group, {
    this.alsoMatches = const [],
    this.primary = false,
  });
  final String path;
  final IconData icon;
  final IconData selectedIcon;
  final String label;
  final NavGroup group;

  /// Extra route prefixes that belong to this destination but do not start with [path] —
  /// `/instruments/pending` is reached from Импорт and must keep it highlighted, and the
  /// four phase-4 screens are reached from Аналитика the same way.
  final List<String> alsoMatches;

  /// Shown directly in the bottom bar on a phone. Everything else moves behind «Ещё».
  final bool primary;

  /// The longest prefix of [location] this destination claims, or -1 for no match.
  int matchLength(String location) {
    var best = -1;
    for (final p in [path, ...alsoMatches]) {
      final hit = p == '/' ? location == '/' : location.startsWith(p);
      if (hit && p.length > best) best = p.length;
    }
    return best;
  }
}

const navDestinations = [
  NavDestination(
    '/',
    Icons.dashboard_outlined,
    Icons.dashboard,
    'Обзор',
    NavGroup.overview,
    primary: true,
  ),
  // One entry for the phase-4 screens. They keep their own top-level routes from the
  // contract and stay deep-linkable; `/analytics` is what the bars point at, and
  // `alsoMatches` keeps it highlighted while you are inside any of them.
  NavDestination(
    '/analytics',
    Icons.insights_outlined,
    Icons.insights,
    'Аналитика',
    NavGroup.overview,
    alsoMatches: ['/income', '/rebalance', '/goals', '/tax', '/portfolios'],
    primary: true,
  ),
  NavDestination(
    '/portfolio',
    Icons.pie_chart_outline,
    Icons.pie_chart,
    'Портфель',
    NavGroup.overview,
    primary: true,
  ),
  NavDestination(
    '/accounts',
    Icons.account_balance_outlined,
    Icons.account_balance,
    'Счета',
    NavGroup.overview,
    primary: true,
  ),
  NavDestination(
    '/events',
    Icons.event_note_outlined,
    Icons.event_note,
    'События',
    NavGroup.ledger,
  ),
  NavDestination(
    '/imports',
    Icons.upload_file_outlined,
    Icons.upload_file,
    'Импорт',
    NavGroup.ledger,
    alsoMatches: ['/instruments/pending'],
  ),
  NavDestination(
    '/cashflow',
    Icons.swap_horiz_outlined,
    Icons.swap_horiz,
    'Потоки',
    NavGroup.ledger,
  ),
  NavDestination(
    '/categories',
    Icons.category_outlined,
    Icons.category,
    'Категории',
    NavGroup.ledger,
  ),
  NavDestination(
    '/transactions',
    Icons.receipt_long_outlined,
    Icons.receipt_long,
    'Операции',
    NavGroup.ledger,
  ),
  NavDestination(
    '/rules',
    Icons.rule_folder_outlined,
    Icons.rule_folder,
    'Правила',
    NavGroup.ledger,
  ),
  NavDestination(
    '/health',
    Icons.monitor_heart_outlined,
    Icons.monitor_heart,
    'Здоровье',
    NavGroup.system,
  ),
  NavDestination(
    '/settings',
    Icons.settings_outlined,
    Icons.settings,
    'Настройки',
    NavGroup.system,
  ),
];