syntax = "proto3";

import "common.proto";
import "server.proto";
import "google/protobuf/timestamp.proto";

package controller;

service IsolateController {
    // Run the given function on the specified environment. Streams logs
    // and the result originating from that function.
    rpc Run (HostedRun) returns (stream HostedRunResult) {}
    // Run the given function in parallel with the given inputs
    rpc Map (HostedMap) returns (stream HostedRunResult) {}
    // Schedule the given function to be run with the specified cron.
    rpc Schedule (HostedRunCron) returns (ScheduleInfo) {}
    // List scheduled runs.
    rpc ListScheduledRuns (ListScheduledRunsRequest) returns (ListScheduledRunsResponse) {}
    // Cancel a scheduled run.
    rpc CancelScheduledRun (CancelScheduledRunRequest) returns (CancelScheduledRunResponse) {}
    // List all the activations of one scheduled run.
    rpc ListScheduledRunActivations (ListScheduledRunActivationsRequest) returns (ListScheduledRunActivationsResponse) {}
    // Get logs from a particular activation of a scheduled run.
    rpc GetScheduledActivationLogs (GetScheduledActivationLogsRequest) returns (GetScheduledActivationLogsResponse) {}
    // Creates an authentication key for a user
    rpc CreateUserKey (CreateUserKeyRequest) returns (CreateUserKeyResponse) {}
    // Lists the user's authentication keys
    rpc ListUserKeys (ListUserKeysRequest) returns (ListUserKeysResponse) {}
    // Revokes an authentication key for a user
    rpc RevokeUserKey (RevokeUserKeyRequest) returns (RevokeUserKeyResponse) {}
}

message HostedMap {
    // Environment definitions.
    repeated EnvironmentDefinition environments = 1;
    // Machine requirements
    optional MachineRequirements machine_requirements = 2;
    // Function to run.
    SerializedObject function = 3;
    // Inputs to the function
    repeated SerializedObject inputs = 4;
}

message HostedRun {
    // Environment definitions.
    repeated EnvironmentDefinition environments = 1;
    // Machine requirements
    optional MachineRequirements machine_requirements = 2;
    // Function to run.
    SerializedObject function = 3;
    // Optional setup function to pass as the first argument to the function.
    optional SerializedObject setup_func = 4;
}

message HostedRunCron {
    // Environment definitions.
    repeated EnvironmentDefinition environments = 1;
    // Machine requirements
    optional MachineRequirements machine_requirements = 2;
    // Function to run.
    SerializedObject function = 3;
    // cron string to represent the run schedule
    string cron = 4;
}

message CancelScheduledRunRequest {
    // The id of the scheduled run to cancel.
    string run_id = 1;
}

message CancelScheduledRunResponse {
    // Empty. For future use.
}

message ListScheduledRunsRequest {
    // Empty. For future use.
}

message ListScheduledRunActivationsRequest {
    // The id of the scheduled run to list activations for.
    string run_id = 1;
}

message ListScheduledRunActivationsResponse {
    // The list of activations (which correspond to timestamps)
    repeated string activation_ids = 1;
}

message ListScheduledRunsResponse {
    repeated ScheduleInfo scheduled_runs = 1;
}

message GetScheduledActivationLogsRequest {
    // The id of the scheduled run to get.
    string run_id = 1;

    // The id of the activation to get logs for.
    string activation_id = 2;
}

message GetScheduledActivationLogsResponse {
    // All the logs from this activation (the format is TBD, currently raw strings).
    bytes raw_logs = 1;
}

message CreateUserKeyRequest {
    // Empty. For future use.
}

message CreateUserKeyResponse {
    string key_secret = 1;
    string key_id = 2;
    optional string description = 3;
}

message ListUserKeysRequest {
    // Empty. For future use.
}

message ListUserKeysResponse {
    repeated UserKeyInfo user_keys = 1;
}

message RevokeUserKeyRequest {
    string key_id = 1;
}

message RevokeUserKeyResponse {
    // Empty. For future use.
}

message UserKeyInfo {
    string key_id = 1;
    google.protobuf.Timestamp created_at = 2;
}

message ScheduleInfo {
    // Unique run id / token.
    string run_id = 1;

    enum State {
        // The run has been scheduled.
        SCHEDULED = 0;
        // The run has failed because of isolate.
        INTERNAL_FAILURE = 1;
        // The run has been cancelled.
        CANCELLED = 2;
    }

    // The state of the run.
    State state = 2;

    // Cron string to represent the run schedule.
    string cron = 3;
}

message HostedRunResult {
    // Unique run id / token.
    string run_id = 1;

    // Optionally the status of the current run (in terms of
    // fal cloud).
    optional HostedRunStatus status = 2;

    // The most recent logs from the run.
    repeated Log logs = 3;

    // The result of the run, if it is complete (indicated by
    // status.is_complete).
    optional SerializedObject return_value = 4;
}

message HostedRunStatus {
    enum State {
        // The run is in progress.
        IN_PROGRESS = 0;
        // The run has completed successfully.
        SUCCESS = 1;
        // The run has failed because of isolate.
        INTERNAL_FAILURE = 2;
        // TODO: probably QUEUED, etc.
    }

    // The state of the run.
    State state = 1;

    // TODO: probably a free form struct for more detailed
    // information (how it crashed, position in queue, etc).
}

message MachineRequirements {
    // Machine type. It is not an enum because we want to be able
    // to dynamically add new machine types without regenerating
    // both the client and the server. Validation is done at the
    // server side.
    string machine_type = 1;
    optional int32 keep_alive = 2;
}