// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
library fuchsia.modular.session;

using fuchsia.io;
using fuchsia.sys;

/// Descriptions and defaults for these configurations are echoed in
/// [modular config guide](https://fuchsia.dev/fuchsia-src/concepts/modular/guide/config).
type BasemgrConfig = table {
    /// When set to false, Cobalt statistics are disabled.
    /// Default: true
    1: enable_cobalt bool;

    /// Create story shells through StoryShellFactory exposed by the session
    /// shell instead of creating separate story shell components. When set,
    /// `story_shell_url` and any story shell args are ignored.
    /// Default: false
    3: use_session_shell_for_story_shell_factory bool;

    /// A map of launch configurations specific to session shells.
    5: session_shell_map vector<SessionShellMapEntry>;

    /// Launch configurations specific to story shell.
    6: story_shell StoryShellConfig;

    /// Launch configuration for a session launcher component.
    ///
    /// If specified, this component is started instead of sessionmgr,
    /// and all other configuration fields are ignored, except `enable_cobalt`.
    ///
    /// The session launcher component can then use the `Launcher` protocol
    /// to launch sessionmgr with a particular configuration.
    8: session_launcher AppConfig;

    /// When set to true, basemgr will not use graphics.
    /// Default: false
    9: headless bool;
};

type SessionShellMapEntry = table {
    /// The name of the session shell represented by its url.
    1: name fuchsia.io.Path;

    /// The launch configurations for the session shell.
    2: config SessionShellConfig;
};

type SessionShellConfig = table {
    /// Contains the fuchsia package url and arguments to pass to the shell.
    1: app_config AppConfig;
};

type StoryShellConfig = table {
    /// Contains the fuchsia package url and arguments to pass to the shell.
    1: app_config AppConfig;
};

type SessionmgrConfig = table {
    /// When set to false, Cobalt statistics are disabled. This is used for
    /// testing.
    /// Default: true
    2: enable_cobalt bool;

    3: reserved bool;

    /// A list of fuchsia package urls that specify which agents to launch at
    /// startup.
    5: startup_agents vector<fuchsia.io.Path>;

    /// A list of fuchsia package urls that specify which agents to launch at
    /// startup with PuppetMaster and FocusProvider services.
    6: session_agents vector<fuchsia.io.Path>;

    /// The fuchsia package url for which story shell to use.
    7: story_shell_url fuchsia.io.Path;

    /// A map of agents to the arguments they should be started with.
    8: component_args vector<AppConfig>;

    /// A list of services mapped to the component URL that serves it.
    /// Valid components to specify here are agents or the session shell.
    /// Services listed here are available in the incoming namespaces for
    /// modules, shells, and agents.
    10: agent_service_index vector<AgentServiceIndexEntry>;

    /// A list of `fuchsia.modular.Agent` services, as provided to sessionmgr
    /// in `additional_services_for_agents`, mapped to a v1 agent URL.
    ///
    /// Modules, the session shell, and other agents, can connect to services
    /// exposed by v2 agents via
    /// `fuchsia.modular/ComponentContext.DeprecatedConnectToAgent`
    /// and `fuchsia.modular/ComponentContext.DeprecatedConnectToAgentService`,
    /// or from the namespace if the service is present in `agent_service_index`.
    ///
    /// The agent URL and service name must be present in `agent_service_index`
    /// to connect to services with `DeprecatedConnectToAgentService` or
    /// from an agent namespace.
    @available(added=9)
    13: v2_modular_agents vector<V2ModularAgentsEntry>;

    /// A list of agent URLs that will cause the session to be restarted
    /// when they terminate. If an agent is not in this list, sessionmgr will
    /// restart it individually, preserving the session.
    ///
    /// The session shell is automatically added to this list.
    11: restart_session_on_agent_crash vector<fuchsia.io.Path>:MAX;

    /// If set to true, disables any automatic agent restarts when an agent is
    /// observed to have crashed.
    12: disable_agent_restart_on_crash bool;

    /// If set to true, module views are presented to the session shell as
    /// story shell views through GraphicalPresenter protocol, if available.
    @available(added=9)
    14: present_mods_as_stories bool;
};

/// Used to pass around configuration references to apps such as base shell,
/// session shell, story shell, and agents.
type AppConfig = table {
    /// The fuchsia package url for app.
    1: url fuchsia.io.Path;

    /// The arguments for the app.
    2: args vector<string>;
};

/// A service and the URL of the agent known to provide that service.
type AgentServiceIndexEntry = table {
    /// The service name.
    1: service_name string;

    /// The fuchsia component url for agent.
    2: agent_url fuchsia.sys.component_url;

    /// [Optional] The name of the service as published by the Agent.
    /// This allows a service published by an Agent to be made available under
    /// a different name (e.g. for disambiguation from other implementations
    /// of the same service) in the agent-services index.
    @available(added=9)
    3: expose_from string;
};

/// A service name for the `fuchsia.modular.Agent` protocol served by a v2 component
/// and the v1 agent URL that identifies the v2 agent inside Modular.
@available(added=9)
type V2ModularAgentsEntry = table {
    /// The service name.
    1: service_name string;

    /// The fuchsia component url for agent.
    2: agent_url fuchsia.sys.component_url;
};

/// Contains the configurations for the modular framework components.
type ModularConfig = table {
    1: basemgr_config BasemgrConfig;

    2: sessionmgr_config SessionmgrConfig;
};