sail-rs 0.1.1

//! Typed domain models for the sailbox API: lifecycle, listing, ingress
//! listeners, and volumes.
//!
//! The core owns the wire schema: it deserializes API responses into these
//! structs (applying the wire-schema field defaults) and serializes them back
//! out for bindings. A binding maps a struct onto its own public type by field
//! name without re-parsing the wire shape.

use serde::{Deserialize, Serialize};
use time::OffsetDateTime;

/// Lifecycle status of a sailbox. An unrecognized server value is preserved in
/// `Other` so a status a newer backend introduces never fails parsing.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum SailboxStatus {
    /// Running and serving.
    Running,
    /// Paused in memory.
    Paused,
    /// Sleeping (checkpointed to disk).
    Sleeping,
    /// In a failed state.
    Failed,
    /// Terminated.
    Terminated,
    /// A status this SDK version does not recognize, kept verbatim.
    Other(String),
}

impl SailboxStatus {
    /// The wire string for this status.
    pub fn as_str(&self) -> &str {
        match self {
            SailboxStatus::Running => "running",
            SailboxStatus::Paused => "paused",
            SailboxStatus::Sleeping => "sleeping",
            SailboxStatus::Failed => "failed",
            SailboxStatus::Terminated => "terminated",
            SailboxStatus::Other(s) => s,
        }
    }
}

impl From<&str> for SailboxStatus {
    fn from(s: &str) -> SailboxStatus {
        match s {
            "running" => SailboxStatus::Running,
            "paused" => SailboxStatus::Paused,
            "sleeping" => SailboxStatus::Sleeping,
            "failed" => SailboxStatus::Failed,
            "terminated" => SailboxStatus::Terminated,
            other => SailboxStatus::Other(other.to_string()),
        }
    }
}

impl std::fmt::Display for SailboxStatus {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_str(self.as_str())
    }
}

impl Serialize for SailboxStatus {
    fn serialize<S: serde::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
        serializer.serialize_str(self.as_str())
    }
}

impl<'de> Deserialize<'de> for SailboxStatus {
    fn deserialize<D: serde::Deserializer<'de>>(
        deserializer: D,
    ) -> Result<SailboxStatus, D::Error> {
        Ok(SailboxStatus::from(
            String::deserialize(deserializer)?.as_str(),
        ))
    }
}

/// A lifecycle status a client can filter by in [`ListQuery`]. A closed set: a
/// client only filters by statuses the SDK knows. Server responses use the open
/// [`SailboxStatus`], which tolerates a status a newer backend introduces.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum SailboxStatusFilter {
    /// Running and serving.
    Running,
    /// Paused in memory.
    Paused,
    /// Sleeping (checkpointed to disk).
    Sleeping,
    /// In a failed state.
    Failed,
    /// Terminated.
    Terminated,
}

impl SailboxStatusFilter {
    /// The wire string for this status.
    pub fn as_str(&self) -> &'static str {
        match self {
            SailboxStatusFilter::Running => "running",
            SailboxStatusFilter::Paused => "paused",
            SailboxStatusFilter::Sleeping => "sleeping",
            SailboxStatusFilter::Failed => "failed",
            SailboxStatusFilter::Terminated => "terminated",
        }
    }

    /// Parse a wire string, returning `None` for a status the SDK does not know.
    pub fn parse(s: &str) -> Option<SailboxStatusFilter> {
        match s {
            "running" => Some(SailboxStatusFilter::Running),
            "paused" => Some(SailboxStatusFilter::Paused),
            "sleeping" => Some(SailboxStatusFilter::Sleeping),
            "failed" => Some(SailboxStatusFilter::Failed),
            "terminated" => Some(SailboxStatusFilter::Terminated),
            _ => None,
        }
    }
}

/// Wire protocol for an ingress port or listener. An unrecognized value is
/// preserved in `Other` so a protocol a newer backend introduces never fails.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum Protocol {
    /// Raw TCP.
    Tcp,
    /// HTTP.
    Http,
    /// A protocol this SDK version does not recognize, kept verbatim.
    Other(String),
}

impl Protocol {
    /// The wire string for this protocol.
    pub fn as_str(&self) -> &str {
        match self {
            Protocol::Tcp => "tcp",
            Protocol::Http => "http",
            Protocol::Other(s) => s,
        }
    }
}

impl From<&str> for Protocol {
    fn from(s: &str) -> Protocol {
        match s {
            "tcp" => Protocol::Tcp,
            "http" => Protocol::Http,
            other => Protocol::Other(other.to_string()),
        }
    }
}

impl std::fmt::Display for Protocol {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_str(self.as_str())
    }
}

impl Serialize for Protocol {
    fn serialize<S: serde::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
        serializer.serialize_str(self.as_str())
    }
}

impl<'de> Deserialize<'de> for Protocol {
    fn deserialize<D: serde::Deserializer<'de>>(deserializer: D) -> Result<Protocol, D::Error> {
        Ok(Protocol::from(String::deserialize(deserializer)?.as_str()))
    }
}

/// Status of a listener's ingress route. An unrecognized value is preserved in
/// `Other` so a status a newer backend introduces never fails to parse.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum ListenerRouteStatus {
    /// The route state is not yet known.
    Unspecified,
    /// The route is being set up.
    Pending,
    /// The route is active and ready to carry traffic.
    Active,
    /// The route is being restored after a checkpoint or migration.
    Restoring,
    /// The route is temporarily unavailable.
    Unavailable,
    /// A status this SDK version does not recognize, kept verbatim.
    Other(String),
}

impl ListenerRouteStatus {
    /// The wire string for this status.
    pub fn as_str(&self) -> &str {
        match self {
            ListenerRouteStatus::Unspecified => "LISTENER_ROUTE_STATUS_UNSPECIFIED",
            ListenerRouteStatus::Pending => "LISTENER_ROUTE_STATUS_PENDING",
            ListenerRouteStatus::Active => "LISTENER_ROUTE_STATUS_ACTIVE",
            ListenerRouteStatus::Restoring => "LISTENER_ROUTE_STATUS_RESTORING",
            ListenerRouteStatus::Unavailable => "LISTENER_ROUTE_STATUS_UNAVAILABLE",
            ListenerRouteStatus::Other(s) => s,
        }
    }
}

impl From<&str> for ListenerRouteStatus {
    fn from(s: &str) -> ListenerRouteStatus {
        match s {
            "LISTENER_ROUTE_STATUS_UNSPECIFIED" => ListenerRouteStatus::Unspecified,
            "LISTENER_ROUTE_STATUS_PENDING" => ListenerRouteStatus::Pending,
            "LISTENER_ROUTE_STATUS_ACTIVE" => ListenerRouteStatus::Active,
            "LISTENER_ROUTE_STATUS_RESTORING" => ListenerRouteStatus::Restoring,
            "LISTENER_ROUTE_STATUS_UNAVAILABLE" => ListenerRouteStatus::Unavailable,
            other => ListenerRouteStatus::Other(other.to_string()),
        }
    }
}

impl std::fmt::Display for ListenerRouteStatus {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_str(self.as_str())
    }
}

impl Serialize for ListenerRouteStatus {
    fn serialize<S: serde::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
        serializer.serialize_str(self.as_str())
    }
}

impl<'de> Deserialize<'de> for ListenerRouteStatus {
    fn deserialize<D: serde::Deserializer<'de>>(
        deserializer: D,
    ) -> Result<ListenerRouteStatus, D::Error> {
        Ok(ListenerRouteStatus::from(
            String::deserialize(deserializer)?.as_str(),
        ))
    }
}

/// Transport protocol a client requests when exposing an ingress port. A closed
/// set: a client can only request a protocol the SDK supports. Server responses
/// use the open [`Protocol`], which tolerates a protocol a newer backend adds.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum IngressProtocol {
    /// Raw TCP.
    Tcp,
    /// HTTP.
    Http,
}

impl IngressProtocol {
    /// The wire string for this protocol.
    pub fn as_str(&self) -> &'static str {
        match self {
            IngressProtocol::Tcp => "tcp",
            IngressProtocol::Http => "http",
        }
    }

    /// Parse a wire string, returning `None` for a protocol the SDK does not
    /// support.
    pub fn parse(s: &str) -> Option<IngressProtocol> {
        match s {
            "tcp" => Some(IngressProtocol::Tcp),
            "http" => Some(IngressProtocol::Http),
            _ => None,
        }
    }
}

impl std::fmt::Display for IngressProtocol {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.write_str(self.as_str())
    }
}

impl Serialize for IngressProtocol {
    fn serialize<S: serde::Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
        serializer.serialize_str(self.as_str())
    }
}

/// A running-sailbox handle: the fields needed to exec/file/listener against a
/// live box. Returned by create/resume/from_checkpoint.
#[derive(Debug, Clone, Serialize)]
pub struct SailboxHandle {
    /// The sailbox's stable identifier.
    pub sailbox_id: String,
    /// The caller-supplied sailbox name.
    pub name: String,
    /// The sailbox's lifecycle status (for example `running`).
    pub status: SailboxStatus,
    /// Network address of the worker hosting the sailbox.
    pub worker_address: String,
    /// Endpoint used to open exec/file/listener streams to the box.
    pub exec_endpoint: String,
}

/// Read-only snapshot from get/list. Deliberately omits worker_address /
/// exec_endpoint (the list/get endpoints do not return them).
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct SailboxInfo {
    /// The sailbox's stable identifier.
    pub sailbox_id: String,
    /// Identifier of the owning app.
    pub app_id: String,
    /// Name of the owning app.
    pub app_name: String,
    /// Identifier of the image the sailbox was created from.
    pub image_id: String,
    /// The caller-supplied sailbox name.
    pub name: String,
    /// The sailbox's lifecycle status (for example `running`).
    pub status: SailboxStatus,
    /// Configured memory size, in mebibytes.
    pub memory_mib: i64,
    /// Configured number of virtual CPUs.
    pub vcpu_count: i64,
    /// Configured state-disk size, in gibibytes.
    pub state_disk_size_gib: i64,
    /// Requested CPU allocation, in vCPUs.
    pub cpu_requested_vcpu: i64,
    /// Current CPU usage, in vCPUs.
    pub cpu_used_vcpu: f64,
    /// Requested memory allocation, in bytes.
    pub memory_requested_bytes: i64,
    /// Current memory usage, in bytes.
    pub memory_used_bytes: i64,
    /// Requested disk allocation, in bytes.
    pub disk_requested_bytes: i64,
    /// Current disk usage, in bytes.
    pub disk_used_bytes: i64,
    /// CPU architecture of the sailbox (for example `x86_64` or `arm64`).
    pub architecture: String,
    /// Guest schema version the box is running, when reported by the backend.
    #[serde(default)]
    pub guest_schema_version: Option<i64>,
    /// Human-readable error detail, present when the box is in an error state.
    #[serde(default)]
    pub error_message: Option<String>,
    /// Monotonic checkpoint generation counter for the sailbox.
    pub checkpoint_generation: i64,
    /// When the box last started, if it has started.
    #[serde(with = "time::serde::rfc3339::option", default)]
    pub started_at: Option<OffsetDateTime>,
    /// When the most recent checkpoint was taken, if any.
    #[serde(with = "time::serde::rfc3339::option", default)]
    pub last_checkpointed_at: Option<OffsetDateTime>,
    /// When the sailbox was created.
    #[serde(with = "time::serde::rfc3339")]
    pub created_at: OffsetDateTime,
    /// When the sailbox was last updated.
    #[serde(with = "time::serde::rfc3339")]
    pub updated_at: OffsetDateTime,
}

/// One page of list results plus the pagination envelope.
#[derive(Debug, Clone, Serialize)]
pub struct SailboxPage {
    /// The sailboxes in this page.
    pub items: Vec<SailboxInfo>,
    /// Maximum number of items requested for this page.
    pub limit: i64,
    /// Zero-based offset of the first item in this page.
    pub offset: i64,
    /// Total number of sailboxes matching the query across all pages.
    pub total: i64,
    /// True when further pages exist beyond this one.
    pub has_more: bool,
}

/// A durable checkpoint handle. `status` echoes the source sailbox's lifecycle
/// status after checkpointing (a running box is snapshotted; a paused/sleeping
/// one returns its existing checkpoint), so the binding can sync its handle.
#[derive(Debug, Clone, Serialize)]
pub struct SailboxCheckpoint {
    /// Stable identifier of the checkpoint.
    pub checkpoint_id: String,
    /// Identifier of the sailbox the checkpoint was taken from.
    pub sailbox_id: String,
    /// Checkpoint generation counter captured by this checkpoint.
    pub checkpoint_generation: i64,
    /// Source sailbox's lifecycle status after checkpointing.
    pub status: SailboxStatus,
}

/// Filters for list/list_page.
#[derive(Debug, Clone)]
pub struct ListQuery {
    /// Restrict results to sailboxes owned by this app (id or name).
    pub app: Option<String>,
    /// Restrict results to sailboxes in this lifecycle status.
    pub status: Option<SailboxStatusFilter>,
    /// Free-text search filter applied by the backend.
    pub search: Option<String>,
    /// Exclude sailboxes whose guest schema version exceeds this value.
    pub max_guest_schema_version: Option<i64>,
    /// Maximum number of items to return.
    pub limit: i64,
    /// Zero-based offset of the first item to return.
    pub offset: i64,
}

/// Default page size for listing, matching the sailbox API's own default. The
/// API rejects `limit=0`, so the derived all-zero default cannot be used.
pub const DEFAULT_LIST_LIMIT: i64 = 50;

/// Resource-limit bounds enforced at create time. These mirror the scheduler's
/// authoritative limits so every binding (CLI, Python, future SDKs) fails fast
/// with the same error instead of round-tripping to a backend rejection.
pub const MAX_SAILBOX_VCPUS: i64 = 4;
/// Minimum requested memory in MiB (0 is allowed and means "use the default").
pub const MIN_SAILBOX_MEMORY_MIB: i64 = 1024;
/// Maximum requested memory in MiB.
pub const MAX_SAILBOX_MEMORY_MIB: i64 = 8192;
/// Maximum requested state-disk size in GiB.
pub const MAX_SAILBOX_DISK_GIB: i64 = 32;

impl Default for ListQuery {
    fn default() -> ListQuery {
        ListQuery {
            app: None,
            status: None,
            search: None,
            max_guest_schema_version: None,
            limit: DEFAULT_LIST_LIMIT,
            offset: 0,
        }
    }
}

/// One guest ingress port to reserve at create time.
#[derive(Debug, Clone, Serialize)]
pub struct IngressPort {
    /// Port inside the guest to expose for ingress.
    pub guest_port: u32,
    /// Transport protocol for the port (for example `tcp`).
    pub protocol: IngressProtocol,
    /// Source addresses allowed to reach the port; empty means all sources are
    /// allowed. Always sent (even when empty) so the request states it
    /// explicitly rather than relying on an omitted field.
    pub allowlist: Vec<String>,
}

/// One NFS volume mount.
#[derive(Debug, Clone, Serialize)]
pub struct VolumeMount {
    /// Identifier of the NFS volume to mount.
    pub volume_id: String,
    /// Absolute path inside the guest where the volume is mounted.
    pub mount_path: String,
}

/// A managed NFS volume as returned by the sailbox-volume API. (The local
/// mount path is a binding-side concern and not part of this wire type.)
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct NfsVolume {
    /// Stable identifier of the volume.
    pub volume_id: String,
    /// Caller-supplied volume name.
    pub name: String,
    /// Storage backend serving the volume.
    pub backend: String,
    /// Lifecycle status of the volume.
    pub status: String,
    /// When the volume was created, if reported.
    #[serde(with = "time::serde::rfc3339::option", default)]
    pub created_at: Option<OffsetDateTime>,
    /// When the volume was last updated, if reported.
    #[serde(with = "time::serde::rfc3339::option", default)]
    pub updated_at: Option<OffsetDateTime>,
}

/// Response from exposing a runtime ingress port (`expose`). The scheduler
/// resolves the public endpoint in this response, so a caller renders it
/// without a second lookup.
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AddListenerResponse {
    /// The in-guest port now exposed.
    pub guest_port: u32,
    /// Wire protocol exposed, e.g. `tcp` or `http`.
    pub protocol: Protocol,
    /// Publicly reachable URL, when the listener has one (typically `http`).
    #[serde(default)]
    pub public_url: String,
    /// Public hostname for a raw-TCP listener.
    #[serde(default)]
    pub tcp_public_host: String,
    /// Public port for a raw-TCP listener.
    #[serde(default)]
    pub tcp_public_port: u32,
}

impl AddListenerResponse {
    /// The reachable endpoint: `public_url` if present, else `host:port` for a
    /// raw-TCP listener, else `None` (e.g. a local stack returns neither).
    pub fn endpoint(&self) -> Option<String> {
        if !self.public_url.is_empty() {
            return Some(self.public_url.clone());
        }
        if !self.tcp_public_host.is_empty() && self.tcp_public_port != 0 {
            return Some(format!("{}:{}", self.tcp_public_host, self.tcp_public_port));
        }
        None
    }
}

/// Inputs to create a sailbox. The image is a typed [`ImageSpec`](crate::image::ImageSpec)
/// (the higher-level image builder lives in the language wrapper); the lifecycle
/// envelope is owned by the core.
#[derive(Debug, Clone)]
pub struct CreateSailboxRequest {
    /// Identifier of the app that will own the sailbox.
    pub app_id: String,
    /// Caller-supplied name for the sailbox.
    pub name: String,
    /// Guest ingress ports to reserve at create time.
    pub ingress_ports: Vec<IngressPort>,
    /// NFS volumes to mount into the guest.
    pub volume_mounts: Vec<VolumeMount>,
    /// The image to create the sailbox from. Serialized to canonical proto-JSON
    /// and sent as the `image` field.
    pub image: crate::image::ImageSpec,
    /// Requested CPU allocation in vCPUs; defaults server-side when absent.
    pub cpu: Option<i64>,
    /// Requested memory size in mebibytes; defaults server-side when absent.
    pub memory_mib: Option<i64>,
    /// Requested state-disk size in gibibytes; defaults server-side when absent.
    pub state_disk_size_gib: Option<i64>,
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn list_query_default_uses_a_valid_nonzero_limit() {
        // The sailbox API rejects limit=0, so the default must be the API's own
        // page size, not the derived zero.
        let query = ListQuery::default();
        assert_eq!(query.limit, DEFAULT_LIST_LIMIT);
        assert!(query.limit > 0);
        assert_eq!(query.offset, 0);
    }
}