// 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.ai.generativelanguage.v1beta2;

import "google/api/field_behavior.proto";

option go_package = "cloud.google.com/go/ai/generativelanguage/apiv1beta2/generativelanguagepb;generativelanguagepb";
option java_multiple_files = true;
option java_outer_classname = "SafetyProto";
option java_package = "com.google.ai.generativelanguage.v1beta2";

// The category of a rating.
//
// These categories cover various kinds of harms that developers
// may wish to adjust.
enum HarmCategory {
  // Category is unspecified.
  HARM_CATEGORY_UNSPECIFIED = 0;

  // Negative or harmful comments targeting identity and/or protected attribute.
  HARM_CATEGORY_DEROGATORY = 1;

  // Content that is rude, disrepspectful, or profane.
  HARM_CATEGORY_TOXICITY = 2;

  // Describes scenarios depictng violence against an individual or group, or
  // general descriptions of gore.
  HARM_CATEGORY_VIOLENCE = 3;

  // Contains references to sexual acts or other lewd content.
  HARM_CATEGORY_SEXUAL = 4;

  // Promotes unchecked medical advice.
  HARM_CATEGORY_MEDICAL = 5;

  // Dangerous content that promotes, facilitates, or encourages harmful acts.
  HARM_CATEGORY_DANGEROUS = 6;
}

// Content filtering metadata associated with processing a single request.
//
// ContentFilter contains a reason and an optional supporting string. The reason
// may be unspecified.
message ContentFilter {
  // A list of reasons why content may have been blocked.
  enum BlockedReason {
    // A blocked reason was not specified.
    BLOCKED_REASON_UNSPECIFIED = 0;

    // Content was blocked by safety settings.
    SAFETY = 1;

    // Content was blocked, but the reason is uncategorized.
    OTHER = 2;
  }

  // The reason content was blocked during request processing.
  BlockedReason reason = 1;

  // A string that describes the filtering behavior in more detail.
  optional string message = 2;
}

// Safety feedback for an entire request.
//
// This field is populated if content in the input and/or response is blocked
// due to safety settings. SafetyFeedback may not exist for every HarmCategory.
// Each SafetyFeedback will return the safety settings used by the request as
// well as the lowest HarmProbability that should be allowed in order to return
// a result.
message SafetyFeedback {
  // Safety rating evaluated from content.
  SafetyRating rating = 1;

  // Safety settings applied to the request.
  SafetySetting setting = 2;
}

// Safety rating for a piece of content.
//
// The safety rating contains the category of harm and the
// harm probability level in that category for a piece of content.
// Content is classified for safety across a number of
// harm categories and the probability of the harm classification is included
// here.
message SafetyRating {
  // The probability that a piece of content is harmful.
  //
  // The classification system gives the probability of the content being
  // unsafe. This does not indicate the severity of harm for a piece of content.
  enum HarmProbability {
    // Probability is unspecified.
    HARM_PROBABILITY_UNSPECIFIED = 0;

    // Content has a negligible chance of being unsafe.
    NEGLIGIBLE = 1;

    // Content has a low chance of being unsafe.
    LOW = 2;

    // Content has a medium chance of being unsafe.
    MEDIUM = 3;

    // Content has a high chance of being unsafe.
    HIGH = 4;
  }

  // Required. The category for this rating.
  HarmCategory category = 3 [(google.api.field_behavior) = REQUIRED];

  // Required. The probability of harm for this content.
  HarmProbability probability = 4 [(google.api.field_behavior) = REQUIRED];
}

// Safety setting, affecting the safety-blocking behavior.
//
// Passing a safety setting for a category changes the allowed proability that
// content is blocked.
message SafetySetting {
  // Block at and beyond a specified harm probability.
  enum HarmBlockThreshold {
    // Threshold is unspecified.
    HARM_BLOCK_THRESHOLD_UNSPECIFIED = 0;

    // Content with NEGLIGIBLE will be allowed.
    BLOCK_LOW_AND_ABOVE = 1;

    // Content with NEGLIGIBLE and LOW will be allowed.
    BLOCK_MEDIUM_AND_ABOVE = 2;

    // Content with NEGLIGIBLE, LOW, and MEDIUM will be allowed.
    BLOCK_ONLY_HIGH = 3;
  }

  // Required. The category for this setting.
  HarmCategory category = 3 [(google.api.field_behavior) = REQUIRED];

  // Required. Controls the probability threshold at which harm is blocked.
  HarmBlockThreshold threshold = 4 [(google.api.field_behavior) = REQUIRED];
}