// Copyright (c) 2020 Gitpod GmbH. All rights reserved.
// Licensed under the GNU Affero General Public License (AGPL).
// See License-AGPL.txt in the project root for license information.

syntax = "proto3";

package supervisor;

import "google/api/annotations.proto";

option go_package = ".;api";

service TerminalService {
    // Open opens a new terminal running the login shell
    rpc Open(OpenTerminalRequest) returns (OpenTerminalResponse) {}

    // Close closes a terminal for the given alias, SIGKILL'ing all child processes
    // before closing the pseudo-terminal.
    rpc Close(CloseTerminalRequest) returns (CloseTerminalResponse) {
        option (google.api.http) = {
            get: "/v1/terminal/close/{alias}"
        };
    }
    
    // List lists all open terminals
    rpc List(ListTerminalsRequest) returns (ListTerminalsResponse) {
        option (google.api.http) = {
            get: "/v1/terminal/list"
        };
    }
    
    // Listen listens to a terminal
    rpc Listen(ListenTerminalRequest) returns (stream ListenTerminalResponse) {
        option (google.api.http) = {
            get: "/v1/terminal/listen/{alias}"
        };
    }

    // Write writes to a terminal
    rpc Write(WriteTerminalRequest) returns (WriteTerminalResponse) {
        option (google.api.http) = {
            post: "/v1/terminal/write/{alias}"
        };
    }
    
    // SetSize sets the terminal's size
    rpc SetSize(SetTerminalSizeRequest) returns (SetTerminalSizeResponse) {}
}

message OpenTerminalRequest {
    map<string, string> env = 2;
}
message OpenTerminalResponse {
    string alias = 1;

    // starter_token can be used to change the terminal size if there are
    // multiple listerns, without having to force your way in.
    string starter_token = 2;
}

message CloseTerminalRequest {
    string alias = 1;
}
message CloseTerminalResponse {}

message ListTerminalsRequest {}
message ListTerminalsResponse {
    message Terminal {
        string alias = 1;
        repeated string command = 2;
        string title = 3;
    }

    repeated Terminal terminals = 1;
}

message ListenTerminalRequest {
    string alias = 1;
}
message ListenTerminalResponse {
    oneof output {
        bytes stdout = 1;
        bytes stderr = 2;
    };
}

message WriteTerminalRequest {
    string alias = 1;
    bytes stdin = 2;
}
message WriteTerminalResponse {
    uint32 bytes_written = 1;
}

message SetTerminalSizeRequest {
    string alias = 1;
    
    // token is the starter_token that Open() returned.
    // Without token it's possible that the request is ignored.
    // If you want to force your size, indendently of all other listener,
    // use force.
    oneof priority {
        string token = 2;
        bool force = 3;
    };

    uint32 rows = 4;
    uint32 cols = 5;
    uint32 widthPx = 6;
    uint32 heightPx = 7;
}
message SetTerminalSizeResponse {}