// Copyright 2025 Envoy Project Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

package envoy.type.matcher.v3;

import "envoy/type/matcher/v3/number.proto";
import "envoy/type/matcher/v3/string.proto";

import "udpa/annotations/status.proto";
import "udpa/annotations/versioning.proto";
import "validate/validate.proto";

option java_package = "io.envoyproxy.envoy.type.matcher.v3";
option java_outer_classname = "ValueProto";
option java_multiple_files = true;
option go_package = "github.com/envoyproxy/go-control-plane/envoy/type/matcher/v3;matcherv3";
option (udpa.annotations.file_status).package_version_status = ACTIVE;

// [#protodoc-title: Value matcher]

// Specifies the way to match a ProtobufWkt::Value. Primitive values and ListValue are supported.
// StructValue is not supported and is always not matched.
// [#next-free-field: 8]
message ValueMatcher {
  option (udpa.annotations.versioning).previous_message_type = "envoy.type.matcher.ValueMatcher";

  // NullMatch is an empty message to specify a null value.
  message NullMatch {
    option (udpa.annotations.versioning).previous_message_type =
        "envoy.type.matcher.ValueMatcher.NullMatch";
  }

  // Specifies how to match a value.
  oneof match_pattern {
    option (validate.required) = true;

    // If specified, a match occurs if and only if the target value is a NullValue.
    NullMatch null_match = 1;

    // If specified, a match occurs if and only if the target value is a double value and is
    // matched to this field.
    DoubleMatcher double_match = 2;

    // If specified, a match occurs if and only if the target value is a string value and is
    // matched to this field.
    StringMatcher string_match = 3;

    // If specified, a match occurs if and only if the target value is a bool value and is equal
    // to this field.
    bool bool_match = 4;

    // If specified, value match will be performed based on whether the path is referring to a
    // valid primitive value in the metadata. If the path is referring to a non-primitive value,
    // the result is always not matched.
    bool present_match = 5;

    // If specified, a match occurs if and only if the target value is a list value and
    // is matched to this field.
    ListMatcher list_match = 6;

    // If specified, a match occurs if and only if any of the alternatives in the match accept the value.
    OrMatcher or_match = 7;
  }
}

// Specifies the way to match a list value.
message ListMatcher {
  option (udpa.annotations.versioning).previous_message_type = "envoy.type.matcher.ListMatcher";

  oneof match_pattern {
    option (validate.required) = true;

    // If specified, at least one of the values in the list must match the value specified.
    ValueMatcher one_of = 1;
  }
}

// Specifies a list of alternatives for the match.
message OrMatcher {
  repeated ValueMatcher value_matchers = 1 [(validate.rules).repeated = {min_items: 2}];
}
