//! Shared configuration composition for project-root and trust discovery.

use super::layer_io::LoadedConfigLayers;
use super::resolve_relative_paths_in_config_toml;
use crate::merge_toml_values;
use std::io;
use std::path::Path;
use toml::Value as TomlValue;

/// Overlay the already-read managed sources at their normal precedence: file,
/// then MDM. Resolve paths as the final loader does, without changing the raw
/// layers or reading either source again.
pub(super) fn merge_managed_config_for_discovery(
    discovery_config: &mut TomlValue,
    loaded: &LoadedConfigLayers,
    codex_home: &Path,
) -> io::Result<()> {
    if let Some(config) = &loaded.managed_config {
        let base_dir = config.file.as_path().parent().ok_or_else(|| {
            io::Error::new(
                io::ErrorKind::InvalidData,
                format!(
                    "Managed config file {} has no parent directory",
                    config.file.as_path().display()
                ),
            )
        })?;
        let resolved =
            resolve_relative_paths_in_config_toml(config.managed_config.clone(), base_dir)?;
        merge_toml_values(discovery_config, &resolved);
    }
    if let Some(config) = &loaded.managed_config_from_mdm {
        let resolved =
            resolve_relative_paths_in_config_toml(config.managed_config.clone(), codex_home)?;
        merge_toml_values(discovery_config, &resolved);
    }
    Ok(())
}

#[cfg(test)]
#[path = "managed_project_discovery_tests.rs"]
mod tests;