// routing_profile.dart — 可配置分流档案(GET/POST /v1/me/routing)。
//
// 对齐后端契约(server/internal/httpapi 分流端点):
// {mode, builtin:{china_direct,lan_direct,private_via_tunnel}, rules:[...], final,
//  system_locked_domains:[...]}(FT-A 起响应含只读私有服务域名清单)。
// 手写 fromJson/toJson(项目无 json_serializable,仿 lib/models/me.dart)。
import 'package:flutter/foundation.dart' show listEquals;

/// 分流模式。
/// 'rule' = 按规则(内置 + 自定义) | 'global' = 全局代理 | 'direct' = 全局直连。
typedef RoutingMode = String;

/// 规则匹配类型。
const kRuleTypes = [
  'domain',
  'domain_suffix',
  'domain_keyword',
  'ip_cidr',
  'geoip',
  'geosite',
];

/// 规则命中动作。
const kRuleActions = ['direct', 'proxy', 'reject'];

/// 内置分流开关(与自定义规则叠加,内置项在服务端渲染时排在自定义规则前/后由服务端决定)。
class Builtin {
  const Builtin({
    this.chinaDirect = true,
    this.lanDirect = true,
    this.privateViaTunnel = true,
  });

  final bool chinaDirect;
  final bool lanDirect;
  final bool privateViaTunnel;

  factory Builtin.fromJson(Map<String, dynamic> m) => Builtin(
        chinaDirect: m['china_direct'] as bool? ?? true,
        lanDirect: m['lan_direct'] as bool? ?? true,
        privateViaTunnel: m['private_via_tunnel'] as bool? ?? true,
      );

  Map<String, dynamic> toJson() => {
        'china_direct': chinaDirect,
        'lan_direct': lanDirect,
        'private_via_tunnel': privateViaTunnel,
      };

  Builtin copyWith({
    bool? chinaDirect,
    bool? lanDirect,
    bool? privateViaTunnel,
  }) =>
      Builtin(
        chinaDirect: chinaDirect ?? this.chinaDirect,
        lanDirect: lanDirect ?? this.lanDirect,
        privateViaTunnel: privateViaTunnel ?? this.privateViaTunnel,
      );

  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
      other is Builtin &&
          runtimeType == other.runtimeType &&
          chinaDirect == other.chinaDirect &&
          lanDirect == other.lanDirect &&
          privateViaTunnel == other.privateViaTunnel;

  @override
  int get hashCode => Object.hash(chinaDirect, lanDirect, privateViaTunnel);
}

/// copyWith 的哨兵值:用于区分「未传参(保留原值)」与「显式传 null(清空该字段)」,
/// 仅 [RoutingRule.note] 需要(其它字段无「清空」语义,`??` 已够用)。
const _noteSentinel = Object();

/// 单条自定义分流规则。
///
/// **enabled 语义**(计划裁决):构造默认 `true`;[toJson] 恒输出 `enabled` 字段
/// (服务端不修正缺省值,契约靠客户端保证);[fromJson] 缺失时容错默认 `true`。
class RoutingRule {
  const RoutingRule({
    required this.type,
    required this.value,
    required this.action,
    this.note,
    this.enabled = true,
  });

  /// domain | domain_suffix | domain_keyword | ip_cidr | geoip | geosite
  final String type;
  final String value;

  /// direct | proxy | reject
  final String action;
  final String? note;
  final bool enabled;

  factory RoutingRule.fromJson(Map<String, dynamic> m) => RoutingRule(
        type: m['type'] as String? ?? '',
        value: m['value'] as String? ?? '',
        action: m['action'] as String? ?? 'proxy',
        note: m['note'] as String?,
        enabled: m['enabled'] as bool? ?? true,
      );

  Map<String, dynamic> toJson() => {
        'type': type,
        'value': value,
        'action': action,
        if (note != null) 'note': note,
        'enabled': enabled,
      };

  /// [note] 用哨兵:不传 → 保留原值;显式传 `null` → 清空为 null。
  RoutingRule copyWith({
    String? type,
    String? value,
    String? action,
    Object? note = _noteSentinel,
    bool? enabled,
  }) =>
      RoutingRule(
        type: type ?? this.type,
        value: value ?? this.value,
        action: action ?? this.action,
        note: identical(note, _noteSentinel) ? this.note : note as String?,
        enabled: enabled ?? this.enabled,
      );

  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
      other is RoutingRule &&
          runtimeType == other.runtimeType &&
          type == other.type &&
          value == other.value &&
          action == other.action &&
          note == other.note &&
          enabled == other.enabled;

  @override
  int get hashCode => Object.hash(type, value, action, note, enabled);
}

/// 分流档案(账户级,单份)。
class RoutingProfile {
  const RoutingProfile({
    this.mode = 'rule',
    this.builtin = const Builtin(),
    this.rules = const [],
    this.finalAction = 'proxy',
    this.systemLockedDomains = const [],
  });

  final RoutingMode mode;
  final Builtin builtin;
  final List<RoutingRule> rules;

  /// 兜底动作(JSON key 为保留字 `final`,Dart 侧改名)。'proxy' | 'direct'。
  final String finalAction;

  /// **只读**:系统强制走隧道的私有服务域名清单(服务端 `PANGOLIN_PRIVATE_SPLIT_DOMAINS`,
  /// FT-A 起随 GET /v1/me/routing 下发)。`toJson()` 不输出——服务端忽略,且此字段
  /// 客户端不可写。
  final List<String> systemLockedDomains;

  factory RoutingProfile.fromJson(Map<String, dynamic> m) => RoutingProfile(
        mode: m['mode'] as String? ?? 'rule',
        builtin: m['builtin'] != null
            ? Builtin.fromJson(m['builtin'] as Map<String, dynamic>)
            : const Builtin(),
        rules: ((m['rules'] as List<dynamic>?) ?? const [])
            .map((e) => RoutingRule.fromJson(e as Map<String, dynamic>))
            .toList(),
        finalAction: m['final'] as String? ?? 'proxy',
        systemLockedDomains:
            (m['system_locked_domains'] as List?)?.cast<String>() ?? const [],
      );

  Map<String, dynamic> toJson() => {
        'mode': mode,
        'builtin': builtin.toJson(),
        'rules': rules.map((r) => r.toJson()).toList(),
        'final': finalAction,
      };

  /// 出厂默认档案(对齐服务端 `routing.Default()`):智能分流 + 内置全开 + 无自定义规则。
  /// 不含 systemLockedDomains(那是账户相关的只读回显,由调用方按需保留;见
  /// RoutingProfileNotifier.resetToDefault())。
  factory RoutingProfile.defaults() => const RoutingProfile(
        mode: 'rule',
        builtin: Builtin(),
        rules: [],
        finalAction: 'proxy',
      );

  RoutingProfile copyWith({
    RoutingMode? mode,
    Builtin? builtin,
    List<RoutingRule>? rules,
    String? finalAction,
    List<String>? systemLockedDomains,
  }) =>
      RoutingProfile(
        mode: mode ?? this.mode,
        builtin: builtin ?? this.builtin,
        rules: rules ?? this.rules,
        finalAction: finalAction ?? this.finalAction,
        systemLockedDomains: systemLockedDomains ?? this.systemLockedDomains,
      );

  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
      other is RoutingProfile &&
          runtimeType == other.runtimeType &&
          mode == other.mode &&
          builtin == other.builtin &&
          listEquals(rules, other.rules) &&
          finalAction == other.finalAction &&
          listEquals(systemLockedDomains, other.systemLockedDomains);

  @override
  int get hashCode => Object.hash(
        mode,
        builtin,
        Object.hashAll(rules),
        finalAction,
        Object.hashAll(systemLockedDomains),
      );
}