// Copyright 2017 Google LLC All Rights Reserved.
//
// 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 agones.dev.sdk;
option go_package = "./sdk";

import "google/api/annotations.proto";
import "protoc-gen-openapiv2/options/annotations.proto";

option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_swagger) = {
    info: {
        title: "sdk.proto";
        version: "version not set";
    };
    schemes: HTTP;
    consumes: "application/json";
    produces: "application/json";
};

// SDK service to be used in the GameServer SDK to the Pod Sidecar
service SDK {
    // Call when the GameServer is ready
    rpc Ready (Empty) returns (Empty) {
        option (google.api.http) = {
            post: "/ready"
            body: "*"
        };
    }

    // Call to self Allocation the GameServer
    rpc Allocate(Empty) returns (Empty) {
        option (google.api.http) = {
            post: "/allocate"
            body: "*"
        };
    }

    // Call when the GameServer is shutting down
    rpc Shutdown (Empty) returns (Empty) {
        option (google.api.http) = {
            post: "/shutdown"
            body: "*"
        };
    }
    // Send a Empty every d Duration to declare that this GameSever is healthy
    rpc Health (stream Empty) returns (Empty) {
        option (google.api.http) = {
            post: "/health"
            body: "*"
        };
    }
    // Retrieve the current GameServer data
    rpc GetGameServer (Empty) returns (GameServer) {
        option (google.api.http) = {
            get: "/gameserver"
        };
    }
    // Send GameServer details whenever the GameServer is updated
    rpc WatchGameServer (Empty) returns (stream GameServer) {
        option (google.api.http) = {
            get: "/watch/gameserver"
        };
    }

    // Apply a Label to the backing GameServer metadata
    rpc SetLabel(KeyValue) returns (Empty) {
        option (google.api.http) = {
            put: "/metadata/label"
            body: "*"
        };
    }

    // Apply a Annotation to the backing GameServer metadata
    rpc SetAnnotation(KeyValue) returns (Empty) {
        option (google.api.http) = {
            put: "/metadata/annotation"
            body: "*"
        };
    }

    // Marks the GameServer as the Reserved state for Duration
    rpc Reserve(Duration) returns (Empty) {
        option (google.api.http) = {
            post: "/reserve"
            body: "*"
        };
    }
}

// I am Empty
message Empty {
}

// Key, Value entry
message KeyValue {
    string key = 1;
    string value = 2;
}

// time duration, in seconds
message Duration {
    int64 seconds = 1;
}

// A GameServer Custom Resource Definition object
// We will only export those resources that make the most
// sense. Can always expand to more as needed.
message GameServer {
    ObjectMeta object_meta = 1;
    Spec spec = 2;
    Status status = 3;

    // representation of the K8s ObjectMeta resource
    message ObjectMeta {
        string name = 1;
        string namespace = 2;
        string uid = 3;
        string resource_version = 4;
        int64 generation = 5;
        // timestamp is in Epoch format, unit: seconds
        int64 creation_timestamp = 6;
        // optional deletion timestamp in Epoch format, unit: seconds
        int64 deletion_timestamp = 7;
        map<string, string> annotations = 8;
        map<string, string> labels = 9;
    }

    message Spec {
        Health health = 1;

        message Health {
            bool disabled = 1 [(grpc.gateway.protoc_gen_openapiv2.options.openapiv2_field) = {format: "boolean"}];
            int32 period_seconds = 2;
            int32 failure_threshold = 3;
            int32 initial_delay_seconds = 4;
        }
    }

    message Status {
        message Port {
            string name = 1;
            int32 port = 2;
        }
        // [Stage:Alpha]
        // [FeatureFlag:PlayerTracking]
        message PlayerStatus {
            int64 count = 1;
            int64 capacity = 2;
            repeated string ids = 3;
        }

        string state = 1;
        string address = 2;
        repeated Port ports = 3;

        // [Stage:Alpha]
        // [FeatureFlag:PlayerTracking]
        PlayerStatus players = 4;
    }
}