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// SPDX-FileCopyrightText: 2026 Andrei G <bug-ops>
// SPDX-License-Identifier: MIT OR Apache-2.0
/// Top-level error type for all `zeph-memory` operations.
///
/// Wraps database, vector-store, LLM, and serialization errors into a single type
/// consumed by callers in `zeph-core`.
///
/// # Examples
///
/// ```rust
/// use zeph_memory::MemoryError;
///
/// fn demo(e: MemoryError) -> String {
/// e.to_string()
/// }
/// ```
#[derive(Debug, thiserror::Error)]
#[non_exhaustive]
pub enum MemoryError {
#[error("sqlx error: {0}")]
Sqlx(#[from] zeph_db::SqlxError),
#[error("db error: {0}")]
Db(#[from] zeph_db::DbError),
#[error("Qdrant error: {0}")]
Qdrant(#[from] Box<qdrant_client::QdrantError>),
#[error("vector store error: {0}")]
VectorStore(#[from] crate::vector_store::VectorStoreError),
#[error("LLM error: {0}")]
Llm(#[from] zeph_llm::LlmError),
#[error("JSON error: {0}")]
Json(#[from] serde_json::Error),
#[error("integer conversion: {0}")]
IntConversion(#[from] std::num::TryFromIntError),
#[error("snapshot error: {0}")]
Snapshot(String),
#[error("I/O error: {0}")]
Io(#[from] std::io::Error),
#[error("graph store error: {0}")]
GraphStore(String),
#[error("invalid input: {0}")]
InvalidInput(String),
/// A mutex or `RwLock` was poisoned by a panicking thread.
///
/// This indicates a programming error (a thread panicked while holding the lock).
/// The inner string describes which lock was poisoned.
#[error("lock poisoned: {0}")]
LockPoisoned(String),
/// Catch-all for errors that do not yet have a specific typed variant.
///
/// # Deprecation
///
/// Prefer adding a typed variant over using `Other`. This variant exists for
/// backward compatibility and will be removed once all callsites are migrated.
#[error("{0}")]
Other(String),
#[error("operation timed out: {0}")]
Timeout(String),
/// Returned when inserting a supersede pointer would form a cycle in the chain.
#[error("supersede cycle detected at edge id={0}")]
SupersedeCycle(i64),
/// Returned when the supersede chain depth would exceed [`crate::graph::conflict::SUPERSEDE_DEPTH_CAP`].
#[error("supersede chain depth cap exceeded at edge id={0}")]
SupersedeDepthExceeded(i64),
/// A promotion-scan or promote error (Feature A, #3305).
///
/// Wraps errors from clustering, skill generation, evaluator calls, or disk writes.
#[error("promotion scan failed: {0}")]
Promotion(String),
}
#[cfg(test)]
mod tests {
use super::MemoryError;
#[test]
fn sqlx_variant_display() {
let inner = zeph_db::SqlxError::RowNotFound;
let err = MemoryError::Sqlx(inner);
assert!(
err.to_string().starts_with("sqlx error:"),
"unexpected display: {err}"
);
}
#[test]
fn db_variant_display() {
let inner = zeph_db::DbError::Io(std::io::Error::new(std::io::ErrorKind::NotFound, "test"));
let err = MemoryError::Db(inner);
assert!(
err.to_string().starts_with("db error:"),
"unexpected display: {err}"
);
}
}