#![allow(clippy::collapsible_if)]
use std::process::Command;

use crate::bare::GitBare;
use crate::error::{GitError, GitResult};
use crate::pb::{Branch, GetBranchRequest, UpdateBranchTargetRequest};

impl GitBare {
    pub fn update_branch_target(&self, request: UpdateBranchTargetRequest) -> GitResult<Branch> {
        crate::sanitize::validate_ref_name(&request.name)?;
        let new_oid = request
            .new_oid
            .as_ref()
            .ok_or_else(|| GitError::InvalidArgument("new_oid is required".into()))?
            .hex
            .clone();
        crate::sanitize::validate_oid_hex(&new_oid)?;
        let refname = format!("refs/heads/{}", request.name);
        let mut args = vec!["update-ref".to_string(), refname.clone(), new_oid];
        if !request.force
            && let Some(old) = request.expected_old_oid.as_ref()
        {
            crate::sanitize::validate_oid_hex(&old.hex)?;
            args.push(old.hex.clone());
        }
        let output = Command::new("git")
            .arg("--git-dir")
            .arg(&self.bare_dir)
            .args(&args)
            .output()?;
        if !output.status.success() {
            return Err(GitError::CommandFailed {
                status_code: output.status.code(),
                stderr: String::from_utf8_lossy(&output.stderr).into_owned(),
            });
        }
        self.get_branch(GetBranchRequest {
            repository: request.repository,
            name: refname.trim_start_matches("refs/heads/").to_string(),
        })
    }
}