use gix::object::tree::EntryKind;

use crate::bare::GitBare;
use crate::error::{GitError, GitResult};
use crate::pb::{FileMetadata, GetFileMetadataRequest, ObjectType};
use crate::resolve_revision;
use crate::tree;

impl GitBare {
    pub fn get_file_metadata(&self, request: GetFileMetadataRequest) -> GitResult<FileMetadata> {
        crate::sanitize::validate_file_path(&request.path)?;
        let repo = self.gix_repo()?;
        let revision = resolve_revision!(request.revision);
        let tree = repo
            .rev_parse_single(format!("{}^{{tree}}", revision).as_str())?
            .object()?
            .try_into_tree()
            .map_err(|e| GitError::Gix(e.to_string()))?;
        let entry = tree
            .lookup_entry_by_path(&request.path)?
            .ok_or_else(|| GitError::NotFound(request.path.clone()))?;
        let hex = entry.id().to_string();
        let kind = match entry.mode().kind() {
            EntryKind::Tree => ObjectType::Tree,
            EntryKind::Commit => ObjectType::Commit,
            _ => ObjectType::Blob,
        } as i32;
        let rc = tree::recent_commit(self, &revision, &request.path);
        Ok(FileMetadata {
            path: request.path,
            oid: Some(self.oid_to_pb(hex)),
            mode: u32::from_str_radix(&format!("{:o}", entry.mode()), 8).unwrap_or(0),
            size: 0,
            r#type: kind,
            binary: false,
            is_lfs: false,
            recent_commit: rc,
        })
    }
}