//! Runtime error taxonomy exposed to management layers.

use std::time::Duration;

use thiserror::Error;

use crate::manifest::ServiceKey;

/// Failures from Runtime configuration, sandbox validation, or Actor execution.
#[derive(Debug, Error)]
pub enum RuntimeError {
    #[error("service id and revision must not be empty")]
    InvalidServiceKey,

    #[error("invalid manifest: {0}")]
    InvalidManifest(String),

    #[error("manifest parse failed: {0}")]
    ManifestParse(#[from] toml::de::Error),

    #[error("service revision {0} is not registered")]
    ServiceNotRegistered(ServiceKey),

    #[error("service revision {0} is already registered")]
    ServiceAlreadyRegistered(ServiceKey),

    #[error("component compilation failed: {0}")]
    ComponentCompilation(#[source] wasmtime::Error),

    #[error("component imports unsupported capability {0}")]
    UnsupportedImport(String),

    #[error("runtime creation failed: {0}")]
    RuntimeCreation(#[source] wasmtime::Error),

    #[error("failed to read component artifact {path}: {source}")]
    ArtifactRead {
        path: String,
        #[source]
        source: std::io::Error,
    },

    #[error("failed to spawn actor thread: {0}")]
    ActorThread(#[source] std::io::Error),

    #[error("actor initialization failed: {0}")]
    ActorInitialization(String),

    #[error("actor for {0} is unavailable")]
    ActorUnavailable(ServiceKey),

    #[error("actor mailbox for {0} is full")]
    ActorOverloaded(ServiceKey),

    #[error("actor for {0} stopped before returning a result")]
    ActorStopped(ServiceKey),

    #[error("input for {service} exceeds the {limit}-byte limit")]
    InputTooLarge { service: ServiceKey, limit: usize },

    #[error("output for {service} exceeds the {limit}-byte limit")]
    OutputTooLarge { service: ServiceKey, limit: usize },

    #[error("actor for {service} exceeded its {deadline:?} execution deadline")]
    DeadlineExceeded {
        service: ServiceKey,
        deadline: Duration,
    },

    #[error("actor for {service} faulted: {message}")]
    ActorFault {
        service: ServiceKey,
        message: String,
    },

    #[error("component returned {kind}: {message}")]
    ComponentError { kind: &'static str, message: String },

    #[error("runtime lock was poisoned")]
    LockPoisoned,
}