// Copyright 2022 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.video.stitcher.v1;

import "google/api/field_behavior.proto";
import "google/api/resource.proto";
import "google/cloud/video/stitcher/v1/companions.proto";
import "google/cloud/video/stitcher/v1/events.proto";
import "google/protobuf/duration.proto";

option go_package = "cloud.google.com/go/video/stitcher/apiv1/stitcherpb;stitcherpb";
option java_multiple_files = true;
option java_outer_classname = "SessionsProto";
option java_package = "com.google.cloud.video.stitcher.v1";

// Metadata for a VOD session.
message VodSession {
  option (google.api.resource) = {
    type: "videostitcher.googleapis.com/VodSession"
    pattern: "projects/{project}/locations/{location}/vodSessions/{vod_session}"
  };

  // Output only. The name of the VOD session, in the form of
  // `projects/{project_number}/locations/{location}/vodSessions/{id}`.
  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. Metadata of what was stitched into the content.
  Interstitials interstitials = 2 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The playback URI of the stitched content.
  string play_uri = 4 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Required. URI of the media to stitch.
  string source_uri = 5 [(google.api.field_behavior) = REQUIRED];

  // Required. Ad tag URI.
  string ad_tag_uri = 6 [(google.api.field_behavior) = REQUIRED];

  // Key value pairs for ad tag macro replacement. If the
  // specified ad tag URI has macros, this field provides the mapping
  // to the value that will replace the macro in the ad tag URI.
  // Macros are designated by square brackets.
  // For example:
  //
  //   Ad tag URI: `"https://doubleclick.google.com/ad/1?geo_id=[geoId]"`
  //
  //   Ad tag macro map: `{"geoId": "123"}`
  //
  //   Fully qualified ad tag:
  //   `"`https://doubleclick.google.com/ad/1?geo_id=123"`
  map<string, string> ad_tag_macro_map = 7;

  // Indicates whether client side ad tracking is enabled. If client
  // side ad tracking is enabled, then the client player is expected
  // to trigger playback and activity events itself.
  // If this is set to false, server side ad tracking is enabled,
  // causing the Video Stitcher service will trigger playback events
  // on behalf of the client player.
  bool client_ad_tracking = 8;

  // Additional options that affect the output of the manifest.
  ManifestOptions manifest_options = 9;

  // Output only. The generated ID of the VodSession's source media.
  string asset_id = 10 [(google.api.field_behavior) = OUTPUT_ONLY];
}

// Describes what was stitched into a VOD session's manifest.
message Interstitials {
  // List of ad breaks ordered by time.
  repeated VodSessionAdBreak ad_breaks = 1;

  // Information related to the content of the VOD session.
  VodSessionContent session_content = 2;
}

// Metadata for an inserted ad in a VOD session.
message VodSessionAd {
  // Duration in seconds of the ad.
  google.protobuf.Duration duration = 1;

  // Metadata of companion ads associated with the ad.
  CompanionAds companion_ads = 2;

  // The list of progress tracking events for the ad break. These can be of
  // the following IAB types: `MUTE`, `UNMUTE`, `PAUSE`, `CLICK`,
  // `CLICK_THROUGH`, `REWIND`, `RESUME`, `ERROR`, `FULLSCREEN`,
  // `EXIT_FULLSCREEN`, `EXPAND`, `COLLAPSE`, `ACCEPT_INVITATION_LINEAR`,
  // `CLOSE_LINEAR`, `SKIP`.
  repeated Event activity_events = 3;
}

// Metadata for the entire stitched content in a VOD session.
message VodSessionContent {
  // The total duration in seconds of the content including the ads stitched
  // in.
  google.protobuf.Duration duration = 1;
}

// Metadata for an inserted ad break.
message VodSessionAdBreak {
  // List of events that are expected to be triggered, ordered by time.
  repeated ProgressEvent progress_events = 1;

  // Ordered list of ads stitched into the ad break.
  repeated VodSessionAd ads = 2;

  // Ad break end time in seconds relative to the start of the VOD asset.
  google.protobuf.Duration end_time_offset = 3;

  // Ad break start time in seconds relative to the start of the VOD asset.
  google.protobuf.Duration start_time_offset = 4;
}

// Metadata for a live session.
message LiveSession {
  option (google.api.resource) = {
    type: "videostitcher.googleapis.com/LiveSession"
    pattern: "projects/{project}/locations/{location}/liveSessions/{live_session}"
  };

  // Defines the stitcher behavior in case an ad does not align exactly with
  // the ad break boundaries. If not specified, the default is COMPLETE_AD.
  enum StitchingPolicy {
    // Stitching policy is not specified.
    STITCHING_POLICY_UNSPECIFIED = 0;

    // Finishes stitching the current ad before returning to content.
    COMPLETE_AD = 1;

    // Cuts an ad short and returns to content in the middle of the ad.
    CUT_CURRENT = 3;
  }

  // Output only. The name of the live session, in the form of
  // `projects/{project}/locations/{location}/liveSessions/{id}`.
  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];

  // Output only. The URI to play the live session's ad-stitched stream.
  string play_uri = 2 [(google.api.field_behavior) = OUTPUT_ONLY];

  // The URI of the live session's source stream.
  string source_uri = 3;

  // The default ad tag to use when no ad tag ids are specified in an ad break's
  // SCTE-35 message.
  //
  // default_ad_tag_id is necessary when `adTagMap` has more than one key. Its
  // value must be present in the `adTagMap`.
  string default_ad_tag_id = 4;

  // Key value pairs for ad tags. Ads parsed from ad tags must be MP4 videos
  // each with at least one audio track.
  map<string, AdTag> ad_tag_map = 5;

  // Key value pairs for ad tag macro replacement. If the
  // specified ad tag URI has macros, this field provides the mapping
  // to the value that will replace the macro in the ad tag URI.
  // Macros are designated by square brackets.
  //
  // For example:
  //
  //   Ad tag URI: "https://doubleclick.google.com/ad/1?geo_id=[geoId]"
  //
  //   Ad tag macros: `{"geoId": "123"}`
  //
  //   Fully qualified ad tag:
  //   `"https://doubleclick.google.com/ad/1?geo_id=123"`
  map<string, string> ad_tag_macros = 6;

  // Whether client side ad tracking is enabled. If enabled, the client player
  // is expected to trigger playback and activity events itself. Otherwise,
  // server side ad tracking is enabled and the Video Stitcher API will trigger
  // playback events on behalf of the client player.
  bool client_ad_tracking = 7;

  // The default slate to use when no slates are specified in an ad break's
  // SCTE-35 message. When specified, this value must match the ID for a slate
  // that has already been created via the
  // [CreateSlate](projects.locations.slates/create) method.
  string default_slate_id = 8;

  // Defines the stitcher behavior in case an ad does not align exactly with
  // the ad break boundaries. If not specified, the default is `COMPLETE_AD`.
  StitchingPolicy stitching_policy = 9;

  // Additional options that affect the output of the manifest.
  ManifestOptions manifest_options = 10;

  // Output only. The generated ID of the LiveSession's source stream.
  string stream_id = 11 [(google.api.field_behavior) = OUTPUT_ONLY];
}

// Metadata of an ad tag.
message AdTag {
  // Ad tag URI template.
  string uri = 1;
}

// Options for manifest generation.
message ManifestOptions {
  // Defines the ordering policy during manifest generation.
  enum OrderPolicy {
    // Ordering policy is not specified.
    ORDER_POLICY_UNSPECIFIED = 0;

    // Order by ascending.
    ASCENDING = 1;

    // Order by descending.
    DESCENDING = 2;
  }

  // If specified, the output manifest will only return renditions matching the
  // specified filters.
  repeated RenditionFilter include_renditions = 1;

  // If specified, the output manifest will orders the video and muxed
  // renditions by bitrate according to the ordering policy.
  OrderPolicy bitrate_order = 2;
}

// Filters for a video or muxed redition.
message RenditionFilter {
  // Bitrate in bits per second for the rendition. If set, only renditions with
  // the exact bitrate will match.
  int32 bitrate_bps = 1;

  // Codecs for the rendition. If set, only renditions with the exact value
  // will match.
  string codecs = 2;
}