syntax = "proto3";

package memos.api.v1;

import "api/v1/attachment_service.proto";
import "api/v1/common.proto";
import "google/api/annotations.proto";
import "google/api/client.proto";
import "google/api/field_behavior.proto";
import "google/api/resource.proto";
import "google/protobuf/empty.proto";
import "google/protobuf/field_mask.proto";
import "google/protobuf/timestamp.proto";

option go_package = "gen/api/v1";

service MemoService {
  // CreateMemo creates a memo. The request body is a Memo; set its content
  // (Markdown) and visibility (PRIVATE | PROTECTED | PUBLIC | SPACE,
  // default PRIVATE).
  // The memo is owned by the authenticated user; requires authentication.
  rpc CreateMemo(CreateMemoRequest) returns (Memo) {
    option (google.api.http) = {
      post: "/api/v1/memos"
      body: "memo"
    };
    option (google.api.method_signature) = "memo";
  }
  // ListMemos lists readable non-comment memos with pagination and filter.
  rpc ListMemos(ListMemosRequest) returns (ListMemosResponse) {
    option (google.api.http) = {get: "/api/v1/memos"};
    option (google.api.method_signature) = "";
  }
  // GetMemo gets a memo.
  rpc GetMemo(GetMemoRequest) returns (Memo) {
    option (google.api.http) = {get: "/api/v1/{name=memos/*}"};
    option (google.api.method_signature) = "name";
  }
  // UpdateMemo updates a memo.
  rpc UpdateMemo(UpdateMemoRequest) returns (Memo) {
    option (google.api.http) = {
      patch: "/api/v1/{memo.name=memos/*}"
      body: "memo"
    };
    option (google.api.method_signature) = "memo,update_mask";
  }
  // DeleteMemo deletes only the named memo and its owned resources. It removes
  // incident relations but never deletes another memo.
  rpc DeleteMemo(DeleteMemoRequest) returns (google.protobuf.Empty) {
    option (google.api.http) = {delete: "/api/v1/{name=memos/*}"};
    option (google.api.method_signature) = "name";
  }
  // SetMemoAttachments replaces the full set of attachments on a memo with the
  // provided list (not an append). Pass the complete desired set; an empty list
  // clears all attachments. Idempotent.
  rpc SetMemoAttachments(SetMemoAttachmentsRequest) returns (google.protobuf.Empty) {
    option (google.api.http) = {
      patch: "/api/v1/{name=memos/*}/attachments"
      body: "*"
    };
    option (google.api.method_signature) = "name";
  }
  // ListMemoAttachments lists attachments for a memo.
  rpc ListMemoAttachments(ListMemoAttachmentsRequest) returns (ListMemoAttachmentsResponse) {
    option (google.api.http) = {get: "/api/v1/{name=memos/*}/attachments"};
    option (google.api.method_signature) = "name";
  }
  // SetMemoRelations replaces the full set of mutable REFERENCE relations on a
  // memo. COMMENT relations are immutable creation context and are rejected by
  // this RPC. An empty list clears references without changing COMMENT.
  rpc SetMemoRelations(SetMemoRelationsRequest) returns (google.protobuf.Empty) {
    option (google.api.http) = {
      patch: "/api/v1/{name=memos/*}/relations"
      body: "*"
    };
    option (google.api.method_signature) = "name";
  }
  // ListMemoRelations lists relations for a memo.
  rpc ListMemoRelations(ListMemoRelationsRequest) returns (ListMemoRelationsResponse) {
    option (google.api.http) = {get: "/api/v1/{name=memos/*}/relations"};
    option (google.api.method_signature) = "name";
  }
  // CreateMemoComment atomically creates an independent memo plus one immutable
  // COMMENT context relation to the named memo. The new memo keeps its own
  // placement, visibility, authorship, and lifecycle.
  rpc CreateMemoComment(CreateMemoCommentRequest) returns (Memo) {
    option (google.api.http) = {
      post: "/api/v1/{name=memos/*}/comments"
      body: "comment"
    };
    option (google.api.method_signature) = "name,comment";
  }
  // ListMemoComments lists comments for a memo.
  rpc ListMemoComments(ListMemoCommentsRequest) returns (ListMemoCommentsResponse) {
    option (google.api.http) = {get: "/api/v1/{name=memos/*}/comments"};
    option (google.api.method_signature) = "name";
  }
  // ListMemoReactions lists reactions for a memo.
  rpc ListMemoReactions(ListMemoReactionsRequest) returns (ListMemoReactionsResponse) {
    option (google.api.http) = {get: "/api/v1/{name=memos/*}/reactions"};
    option (google.api.method_signature) = "name";
  }
  // UpsertMemoReaction adds or updates the authenticated user's reaction on a memo.
  rpc UpsertMemoReaction(UpsertMemoReactionRequest) returns (Reaction) {
    option (google.api.http) = {
      post: "/api/v1/{name=memos/*}/reactions"
      body: "*"
    };
    option (google.api.method_signature) = "name";
  }
  // DeleteMemoReaction deletes a reaction for a memo.
  rpc DeleteMemoReaction(DeleteMemoReactionRequest) returns (google.protobuf.Empty) {
    option (google.api.http) = {delete: "/api/v1/{name=memos/*/reactions/*}"};
    option (google.api.method_signature) = "name";
  }
  // CreateMemoShare creates a share link for a memo. Requires authentication as the memo creator.
  rpc CreateMemoShare(CreateMemoShareRequest) returns (MemoShare) {
    option (google.api.http) = {
      post: "/api/v1/{parent=memos/*}/shares"
      body: "memo_share"
    };
    option (google.api.method_signature) = "parent,memo_share";
  }
  // ListMemoShares lists all share links for a memo. Requires authentication as the memo creator.
  rpc ListMemoShares(ListMemoSharesRequest) returns (ListMemoSharesResponse) {
    option (google.api.http) = {get: "/api/v1/{parent=memos/*}/shares"};
    option (google.api.method_signature) = "parent";
  }
  // DeleteMemoShare revokes a share link. Requires authentication as the memo creator.
  rpc DeleteMemoShare(DeleteMemoShareRequest) returns (google.protobuf.Empty) {
    option (google.api.http) = {delete: "/api/v1/{name=memos/*/shares/*}"};
    option (google.api.method_signature) = "name";
  }
  // GetSharedMemo resolves a share token to its memo. No authentication required.
  // Returns NOT_FOUND if the token is invalid or expired.
  rpc GetSharedMemo(GetSharedMemoRequest) returns (Memo) {
    option (google.api.http) = {get: "/api/v1/shares/{share_token}/memo"};
  }
  // GetLinkMetadata gets metadata for a link.
  rpc GetLinkMetadata(GetLinkMetadataRequest) returns (LinkMetadata) {
    option (google.api.http) = {get: "/api/v1/memos/-/linkMetadata"};
  }
  // BatchGetLinkMetadata gets metadata for links.
  rpc BatchGetLinkMetadata(BatchGetLinkMetadataRequest) returns (BatchGetLinkMetadataResponse) {
    option (google.api.http) = {
      post: "/api/v1/memos/-/linkMetadata:batchGet"
      body: "*"
    };
  }
}

// Visibility controls who can read a memo.
enum Visibility {
  VISIBILITY_UNSPECIFIED = 0;
  // PRIVATE: only the creator can read the memo.
  PRIVATE = 1;
  // PROTECTED: signed-in users of the instance can read the memo.
  PROTECTED = 2;
  // PUBLIC: signed-in users can read the memo; anonymous visitors can read it
  // when instance policy permits.
  PUBLIC = 3;
  // SPACE: active members of the memo's space can read it.
  SPACE = 4;
}

// Reaction is a reaction attached to a memo.
message Reaction {
  option (google.api.resource) = {
    type: "memos.api.v1/Reaction"
    pattern: "memos/{memo}/reactions/{reaction}"
    name_field: "name"
    singular: "reaction"
    plural: "reactions"
  };

  // The resource name of the reaction.
  // Format: memos/{memo}/reactions/{reaction}
  string name = 1 [
    (google.api.field_behavior) = OUTPUT_ONLY,
    (google.api.field_behavior) = IDENTIFIER
  ];

  // The resource name of the creator.
  // Format: users/{user}
  string creator = 2 [
    (google.api.field_behavior) = OUTPUT_ONLY,
    (google.api.resource_reference) = {type: "memos.api.v1/User"}
  ];

  reserved 3;
  reserved "content_id";

  // Required. The type of reaction (e.g., "👍", "❤️", "😄").
  string reaction_type = 4 [(google.api.field_behavior) = REQUIRED];

  // Output only. The creation timestamp.
  google.protobuf.Timestamp create_time = 5 [(google.api.field_behavior) = OUTPUT_ONLY];
}

message Memo {
  option (google.api.resource) = {
    type: "memos.api.v1/Memo"
    pattern: "memos/{memo}"
    name_field: "name"
    singular: "memo"
    plural: "memos"
  };

  // The resource name of the memo.
  // Format: memos/{memo}, where memo is the user-defined UID.
  string name = 1 [(google.api.field_behavior) = IDENTIFIER];

  // The state of the memo.
  State state = 2 [(google.api.field_behavior) = REQUIRED];

  // The name of the creator.
  // Format: users/{user}
  string creator = 3 [
    (google.api.field_behavior) = OUTPUT_ONLY,
    (google.api.resource_reference) = {type: "memos.api.v1/User"}
  ];

  // The creation timestamp.
  // If not set on creation, the server will set it to the current time.
  google.protobuf.Timestamp create_time = 4 [(google.api.field_behavior) = OPTIONAL];

  // The last update timestamp.
  // If not set on creation, the server will set it to the current time.
  google.protobuf.Timestamp update_time = 5 [(google.api.field_behavior) = OPTIONAL];

  reserved 6;
  reserved "display_time";

  // Required. The content of the memo in Markdown format.
  string content = 7 [(google.api.field_behavior) = REQUIRED];

  // The visibility of the memo.
  // One of PRIVATE (creator only), PROTECTED (signed-in users), PUBLIC
  // (anonymous-eligible), or SPACE (active space members). Defaults to
  // PRIVATE on creation when unspecified.
  Visibility visibility = 9 [(google.api.field_behavior) = REQUIRED];

  // Output only. The tags extracted from the content.
  repeated string tags = 10 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Whether the memo is pinned.
  bool pinned = 11 [(google.api.field_behavior) = OPTIONAL];

  // Optional. The attachments of the memo.
  repeated Attachment attachments = 12 [(google.api.field_behavior) = OPTIONAL];

  // Optional. The relations of the memo.
  repeated MemoRelation relations = 13 [(google.api.field_behavior) = OPTIONAL];

  // Output only. The reactions to the memo.
  repeated Reaction reactions = 14 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The computed properties of the memo.
  Property property = 15 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The context memo of this COMMENT relation, if any.
  // Its identity is returned even when the caller cannot read the parent.
  // Fetch the parent independently; this field does not grant read access.
  // Format: memos/{memo}
  optional string parent = 16 [
    (google.api.field_behavior) = OUTPUT_ONLY,
    (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
  ];

  // Output only. The snippet of the memo content. Plain text only.
  string snippet = 17 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Optional. The location of the memo.
  optional Location location = 18 [(google.api.field_behavior) = OPTIONAL];

  // Optional. The space in which this memo is placed. Format: spaces/{space}.
  // Every memo, including a comment, owns its placement independently.
  optional string space = 19 [
    (google.api.field_behavior) = OPTIONAL,
    (google.api.resource_reference) = {type: "memos.api.v1/Space"}
  ];

  // Computed properties of a memo.
  message Property {
    bool has_link = 1;
    bool has_task_list = 2;
    bool has_code = 3;
    bool has_incomplete_tasks = 4;
    // The title extracted from the first H1 heading, if present.
    string title = 5;
  }
}

message Location {
  // A placeholder text for the location.
  string placeholder = 1 [(google.api.field_behavior) = OPTIONAL];

  // The latitude of the location.
  double latitude = 2 [(google.api.field_behavior) = OPTIONAL];

  // The longitude of the location.
  double longitude = 3 [(google.api.field_behavior) = OPTIONAL];
}

message CreateMemoRequest {
  // Required. The memo to create.
  Memo memo = 1 [(google.api.field_behavior) = REQUIRED];

  // Optional. The memo ID to use for this memo.
  // If empty, a unique ID will be generated.
  // Format: ^[a-zA-Z0-9]([a-zA-Z0-9-]{0,34}[a-zA-Z0-9])?$
  string memo_id = 2 [(google.api.field_behavior) = OPTIONAL];
}

message ListMemosRequest {
  // Optional. The maximum number of memos to return.
  // The service may return fewer than this value.
  // If unspecified, at most 50 memos will be returned.
  // The maximum value is 1000; values above 1000 will be coerced to 1000.
  int32 page_size = 1 [(google.api.field_behavior) = OPTIONAL];

  // Optional. A page token, received from a previous `ListMemos` call.
  // Provide this to retrieve the subsequent page.
  string page_token = 2 [(google.api.field_behavior) = OPTIONAL];

  // Optional. The state of the memos to list.
  // Default to `NORMAL`. Set to `ARCHIVED` to list archived memos.
  State state = 3 [(google.api.field_behavior) = OPTIONAL];

  // Optional. The order to sort results by.
  // Default to "create_time desc".
  // Supports comma-separated list of fields following AIP-132.
  // Example: "pinned desc, create_time desc" or "update_time asc"
  // Supported fields: pinned, create_time, update_time, name.
  // Note: order_by uses create_time / update_time, while the filter
  // expression uses created_ts / updated_ts for the same timestamps.
  string order_by = 4 [(google.api.field_behavior) = OPTIONAL];

  // Optional. A CEL expression to filter memos. Combine terms with && and ||.
  // Available fields:
  //   content (string), creator (string, e.g. "users/1"),
  //   created_ts / updated_ts (timestamp), pinned (bool),
  //   visibility (string: PRIVATE | PROTECTED | PUBLIC | SPACE),
  //   space (string resource name, or null when the memo has no space;
  //     supports == and comparisons against null, e.g. space != null),
  //   tags (list<string>; match with `"work" in tags`, not `tag == "work"`),
  //   has_task_list / has_link / has_code / has_incomplete_tasks (bool),
  //   has_location (bool; true when the memo has a location attached).
  // Note: the time fields here are created_ts / updated_ts, which differ from
  // the create_time / update_time names used by order_by.
  // Examples:
  //   pinned == true && visibility == "PUBLIC"
  //   space == "spaces/team" or space == null
  //   tags.exists(t, t == "urgent")
  //   content.contains("roadmap") && created_ts > now - duration("168h")
  string filter = 5 [(google.api.field_behavior) = OPTIONAL];

  // Optional. If true, show deleted memos in the response.
  bool show_deleted = 6 [(google.api.field_behavior) = OPTIONAL];

  reserved 7, 8;
  reserved "space", "unassigned";
}

message ListMemosResponse {
  // The list of memos.
  repeated Memo memos = 1;

  // A token that can be sent as `page_token` to retrieve the next page.
  // If this field is omitted, there are no subsequent pages.
  string next_page_token = 2;
}

message GetMemoRequest {
  // Required. The resource name of the memo.
  // Format: memos/{memo}
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
  ];
}

message UpdateMemoRequest {
  // Required. The memo to update.
  // The `name` field is required.
  Memo memo = 1 [(google.api.field_behavior) = REQUIRED];

  // Required. The list of fields to update.
  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = REQUIRED];
}

message DeleteMemoRequest {
  // Required. The resource name of the memo to delete.
  // Format: memos/{memo}
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
  ];

  // Optional. If set to true, the memo will be deleted even if it has associated data.
  bool force = 2 [(google.api.field_behavior) = OPTIONAL];
}

message SetMemoAttachmentsRequest {
  // Required. The resource name of the memo.
  // Format: memos/{memo}
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
  ];

  // Required. The attachments to set for the memo.
  repeated Attachment attachments = 2 [(google.api.field_behavior) = REQUIRED];
}

message ListMemoAttachmentsRequest {
  // Required. The resource name of the memo.
  // Format: memos/{memo}
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
  ];

  // Optional. The maximum number of attachments to return.
  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];

  // Optional. A page token for pagination.
  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
}

message ListMemoAttachmentsResponse {
  // The list of attachments.
  repeated Attachment attachments = 1;

  // A token for the next page of results.
  string next_page_token = 2;
}

message MemoRelation {
  // The memo in the relation.
  Memo memo = 1 [(google.api.field_behavior) = REQUIRED];

  // The related memo.
  Memo related_memo = 2 [(google.api.field_behavior) = REQUIRED];

  // The type of the relation.
  enum Type {
    TYPE_UNSPECIFIED = 0;
    REFERENCE = 1;
    COMMENT = 2;
  }
  Type type = 3 [(google.api.field_behavior) = REQUIRED];

  // Memo reference in relations.
  message Memo {
    // The resource name of the memo.
    // Format: memos/{memo}
    string name = 1 [
      (google.api.field_behavior) = REQUIRED,
      (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
    ];

    // Output only. The snippet of the memo content. Plain text only.
    string snippet = 2 [(google.api.field_behavior) = OUTPUT_ONLY];
  }
}

message SetMemoRelationsRequest {
  // Required. The resource name of the memo.
  // Format: memos/{memo}
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
  ];

  // Required. The REFERENCE relations to set for the memo. COMMENT is invalid.
  repeated MemoRelation relations = 2 [(google.api.field_behavior) = REQUIRED];
}

message ListMemoRelationsRequest {
  // Required. The resource name of the memo.
  // Format: memos/{memo}
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
  ];

  // Optional. The maximum number of relations to return.
  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];

  // Optional. A page token for pagination.
  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
}

message ListMemoRelationsResponse {
  // The list of relations.
  repeated MemoRelation relations = 1;

  // A token for the next page of results.
  string next_page_token = 2;
}

message CreateMemoCommentRequest {
  // Required. The resource name of the memo.
  // Format: memos/{memo}
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
  ];

  // Required. The comment to create.
  Memo comment = 2 [(google.api.field_behavior) = REQUIRED];

  // Optional. The comment ID to use.
  string comment_id = 3 [(google.api.field_behavior) = OPTIONAL];
}

message ListMemoCommentsRequest {
  // Required. The resource name of the memo.
  // Format: memos/{memo}
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
  ];

  // Optional. The maximum number of comments to return.
  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];

  // Optional. A page token for pagination.
  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];

  // Optional. The order to sort results by.
  string order_by = 4 [(google.api.field_behavior) = OPTIONAL];
}

message ListMemoCommentsResponse {
  // The list of comment memos.
  repeated Memo memos = 1;

  // A token for the next page of results.
  string next_page_token = 2;
}

message ListMemoReactionsRequest {
  // Required. The resource name of the memo.
  // Format: memos/{memo}
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
  ];

  // Optional. The maximum number of reactions to return.
  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];

  // Optional. A page token for pagination.
  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
}

message ListMemoReactionsResponse {
  // The list of reactions.
  repeated Reaction reactions = 1;

  // A token for the next page of results.
  string next_page_token = 2;
}

message UpsertMemoReactionRequest {
  // Required. The resource name of the memo.
  // Format: memos/{memo}
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
  ];

  // Required. The reaction to upsert.
  Reaction reaction = 2 [(google.api.field_behavior) = REQUIRED];
}

message DeleteMemoReactionRequest {
  // Required. The resource name of the reaction to delete.
  // Format: memos/{memo}/reactions/{reaction}
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Reaction"}
  ];
}

// MemoShare is an access grant that permits read-only access to a memo via an opaque bearer token.
message MemoShare {
  option (google.api.resource) = {
    type: "memos.api.v1/MemoShare"
    pattern: "memos/{memo}/shares/{share}"
    singular: "share"
    plural: "shares"
  };

  // The resource name of the share. Format: memos/{memo}/shares/{share}
  // The {share} segment is the opaque token used in the share URL.
  string name = 1 [(google.api.field_behavior) = IDENTIFIER];

  // Output only. When this share link was created.
  google.protobuf.Timestamp create_time = 2 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Optional. When set, the share link stops working after this time.
  // If unset, the link never expires.
  optional google.protobuf.Timestamp expire_time = 3 [(google.api.field_behavior) = OPTIONAL];
}

message CreateMemoShareRequest {
  // Required. The resource name of the memo to share.
  // Format: memos/{memo}
  string parent = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
  ];

  // Required. The share to create.
  MemoShare memo_share = 2 [(google.api.field_behavior) = REQUIRED];
}

message ListMemoSharesRequest {
  // Required. The resource name of the memo.
  // Format: memos/{memo}
  string parent = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/Memo"}
  ];
}

message ListMemoSharesResponse {
  // The list of share links.
  repeated MemoShare memo_shares = 1;
}

message DeleteMemoShareRequest {
  // Required. The resource name of the share to delete.
  // Format: memos/{memo}/shares/{share}
  string name = 1 [
    (google.api.field_behavior) = REQUIRED,
    (google.api.resource_reference) = {type: "memos.api.v1/MemoShare"}
  ];
}

message GetSharedMemoRequest {
  // Required. The opaque bearer token extracted from the share URL.
  string share_token = 1 [(google.api.field_behavior) = REQUIRED];
}

message GetLinkMetadataRequest {
  // Required. The link URL.
  string url = 1 [(google.api.field_behavior) = REQUIRED];
}

message BatchGetLinkMetadataRequest {
  // Required. The link URLs.
  repeated string urls = 1 [(google.api.field_behavior) = REQUIRED];
}

message BatchGetLinkMetadataResponse {
  // The link metadata list, in the same order as the input URLs.
  repeated LinkMetadata link_metadata = 1;
}

message LinkMetadata {
  // The original link URL.
  string url = 1;

  // The link title.
  string title = 2;

  // The link description.
  string description = 3;

  // The link image URL.
  string image = 4;
}