// Copyright 2025 Google LLC
//
// 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 google.cloud.discoveryengine.v1alpha;

import "google/api/field_behavior.proto";
import "google/api/resource.proto";
import "google/cloud/discoveryengine/v1alpha/common.proto";
import "google/protobuf/struct.proto";
import "google/protobuf/timestamp.proto";
import "google/rpc/status.proto";

option csharp_namespace = "Google.Cloud.DiscoveryEngine.V1Alpha";
option go_package = "cloud.google.com/go/discoveryengine/apiv1alpha/discoveryenginepb;discoveryenginepb";
option java_multiple_files = true;
option java_outer_classname = "DocumentProto";
option java_package = "com.google.cloud.discoveryengine.v1alpha";
option objc_class_prefix = "DISCOVERYENGINE";
option php_namespace = "Google\\Cloud\\DiscoveryEngine\\V1alpha";
option ruby_package = "Google::Cloud::DiscoveryEngine::V1alpha";

// Document captures all raw metadata information of items to be recommended or
// searched.
message Document {
  option (google.api.resource) = {
    type: "discoveryengine.googleapis.com/Document"
    pattern: "projects/{project}/locations/{location}/dataStores/{data_store}/branches/{branch}/documents/{document}"
    pattern: "projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document}"
  };

  // Unstructured data linked to this document.
  message Content {
    oneof content {
      // The content represented as a stream of bytes. The maximum length is
      // 1,000,000 bytes (1 MB / ~0.95 MiB).
      //
      // Note: As with all `bytes` fields, this field is represented as pure
      // binary in Protocol Buffers and base64-encoded string in JSON. For
      // example, `abc123!?$*&()'-=@~` should be represented as
      // `YWJjMTIzIT8kKiYoKSctPUB+` in JSON. See
      // https://developers.google.com/protocol-buffers/docs/proto3#json.
      bytes raw_bytes = 2;

      // The URI of the content. Only Cloud Storage URIs (e.g.
      // `gs://bucket-name/path/to/file`) are supported. The maximum file size
      // is 2.5 MB for text-based formats, 200 MB for other formats.
      string uri = 3;
    }

    // The MIME type of the content. Supported types:
    //
    // * `application/pdf` (PDF, only native PDFs are supported for now)
    // * `text/html` (HTML)
    // * `application/vnd.openxmlformats-officedocument.wordprocessingml.document` (DOCX)
    // * `application/vnd.openxmlformats-officedocument.presentationml.presentation` (PPTX)
    // * `text/plain` (TXT)
    //
    // See https://www.iana.org/assignments/media-types/media-types.xhtml.
    string mime_type = 1;
  }

  // ACL Information of the Document.
  message AclInfo {
    // AclRestriction to model complex inheritance restrictions.
    //
    // Example: Modeling a "Both Permit" inheritance, where to access a
    // child document, user needs to have access to parent document.
    //
    // Document Hierarchy - Space_S --> Page_P.
    //
    // Readers:
    //   Space_S: group_1, user_1
    //   Page_P: group_2, group_3, user_2
    //
    // Space_S ACL Restriction -
    // {
    //   "acl_info": {
    //     "readers": [
    //       {
    //         "principals": [
    //           {
    //             "group_id": "group_1"
    //           },
    //           {
    //             "user_id": "user_1"
    //           }
    //         ]
    //       }
    //     ]
    //   }
    // }
    //
    // Page_P ACL Restriction.
    // {
    //   "acl_info": {
    //     "readers": [
    //       {
    //         "principals": [
    //           {
    //             "group_id": "group_2"
    //           },
    //           {
    //             "group_id": "group_3"
    //           },
    //           {
    //             "user_id": "user_2"
    //           }
    //         ],
    //       },
    //       {
    //         "principals": [
    //           {
    //             "group_id": "group_1"
    //           },
    //           {
    //             "user_id": "user_1"
    //           }
    //         ],
    //       }
    //     ]
    //   }
    // }
    message AccessRestriction {
      // List of principals.
      repeated Principal principals = 1;

      // All users within the Identity Provider.
      bool idp_wide = 2;
    }

    // Readers of the document.
    repeated AccessRestriction readers = 1;
  }

  // Index status of the document.
  message IndexStatus {
    // The time when the document was indexed.
    // If this field is populated, it means the document has been indexed.
    google.protobuf.Timestamp index_time = 1;

    // A sample of errors encountered while indexing the document.
    // If this field is populated, the document is not indexed due to errors.
    repeated google.rpc.Status error_samples = 2;
  }

  // Data representation. One of
  // [struct_data][google.cloud.discoveryengine.v1alpha.Document.struct_data] or
  // [json_data][google.cloud.discoveryengine.v1alpha.Document.json_data] should
  // be provided otherwise an `INVALID_ARGUMENT` error is thrown.
  oneof data {
    // The structured JSON data for the document. It should conform to the
    // registered [Schema][google.cloud.discoveryengine.v1alpha.Schema] or an
    // `INVALID_ARGUMENT` error is thrown.
    google.protobuf.Struct struct_data = 4;

    // The JSON string representation of the document. It should conform to the
    // registered [Schema][google.cloud.discoveryengine.v1alpha.Schema] or an
    // `INVALID_ARGUMENT` error is thrown.
    string json_data = 5;
  }

  // Immutable. The full resource name of the document.
  // Format:
  // `projects/{project}/locations/{location}/collections/{collection}/dataStores/{data_store}/branches/{branch}/documents/{document_id}`.
  //
  // This field must be a UTF-8 encoded string with a length limit of 1024
  // characters.
  string name = 1 [(google.api.field_behavior) = IMMUTABLE];

  // Immutable. The identifier of the document.
  //
  // Id should conform to [RFC-1034](https://tools.ietf.org/html/rfc1034)
  // standard with a length limit of 63 characters.
  string id = 2 [(google.api.field_behavior) = IMMUTABLE];

  // The identifier of the schema located in the same data store.
  string schema_id = 3;

  // The unstructured data linked to this document. Content must be set if this
  // document is under a
  // `CONTENT_REQUIRED` data store.
  Content content = 10;

  // The identifier of the parent document. Currently supports at most two level
  // document hierarchy.
  //
  // Id should conform to [RFC-1034](https://tools.ietf.org/html/rfc1034)
  // standard with a length limit of 63 characters.
  string parent_document_id = 7;

  // Output only. This field is OUTPUT_ONLY.
  // It contains derived data that are not in the original input document.
  google.protobuf.Struct derived_struct_data = 6
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Access control information for the document.
  AclInfo acl_info = 11;

  // Output only. The last time the document was indexed. If this field is set,
  // the document could be returned in search results.
  //
  // This field is OUTPUT_ONLY. If this field is not populated, it means the
  // document has never been indexed.
  google.protobuf.Timestamp index_time = 13
      [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The index status of the document.
  //
  // * If document is indexed successfully, the index_time field is populated.
  // * Otherwise, if document is not indexed due to errors, the error_samples
  //   field is populated.
  // * Otherwise, index_status is unset.
  IndexStatus index_status = 15 [(google.api.field_behavior) = OUTPUT_ONLY];
}

// Document captures all raw metadata information of items to be recommended or
// searched.
message ProcessedDocument {
  // Output format of the processed document.
  oneof processed_data_format {
    // The JSON string representation of the processed document.
    string json_data = 2;
  }

  // Required. Full resource name of the referenced document, in the format
  // `projects/*/locations/*/collections/*/dataStores/*/branches/*/documents/*`.
  string document = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {
      type: "discoveryengine.googleapis.com/Document"
    }
  ];
}
