use std::io::ErrorKind;
use std::path::Path;
use crate::product::agent::error::CodexErr;
use crate::product::agent::rollout::SESSIONS_SUBDIR;
pub(crate) fn map_session_init_error(err: &anyhow::Error, lha_home: &Path) -> CodexErr {
if let Some(mapped) = err
.chain()
.filter_map(|cause| cause.downcast_ref::<std::io::Error>())
.find_map(|io_err| map_rollout_io_error(io_err, lha_home))
{
return mapped;
}
CodexErr::Fatal(format!("Failed to initialize session: {err:#}"))
}
fn map_rollout_io_error(io_err: &std::io::Error, lha_home: &Path) -> Option<CodexErr> {
let sessions_dir = lha_home.join(SESSIONS_SUBDIR);
let hint = match io_err.kind() {
ErrorKind::PermissionDenied => format!(
"LHA cannot access session files at {} (permission denied). If sessions were created using sudo, fix ownership: sudo chown -R $(whoami) {}",
sessions_dir.display(),
lha_home.display()
),
ErrorKind::NotFound => format!(
"Session storage missing at {}. Create the directory or choose a different LHA home.",
sessions_dir.display()
),
ErrorKind::AlreadyExists => format!(
"Session storage path {} is blocked by an existing file. Remove or rename it so LHA can create sessions.",
sessions_dir.display()
),
ErrorKind::InvalidData | ErrorKind::InvalidInput => format!(
"Session data under {} looks corrupt or unreadable. Clearing the sessions directory may help (this will remove saved threads).",
sessions_dir.display()
),
ErrorKind::IsADirectory | ErrorKind::NotADirectory => format!(
"Session storage path {} has an unexpected type. Ensure it is a directory LHA can use for session files.",
sessions_dir.display()
),
_ => return None,
};
Some(CodexErr::Fatal(format!(
"{hint} (underlying error: {io_err})"
)))
}