// 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}。
// 手写 fromJson/toJson(项目无 json_serializable,仿 lib/models/me.dart)。

/// 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,
      );
}

/// 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,
      };

  RoutingRule copyWith({
    String? type,
    String? value,
    String? action,
    String? note,
    bool? enabled,
  }) =>
      RoutingRule(
        type: type ?? this.type,
        value: value ?? this.value,
        action: action ?? this.action,
        note: note ?? this.note,
        enabled: enabled ?? this.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',
  });

  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;

  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',
      );

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

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