use std::process::Command;

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

impl GitBare {
    pub fn create_branch(&self, request: CreateBranchRequest) -> GitResult<Branch> {
        crate::sanitize::validate_ref_name(&request.name)?;
        let revision = match request.start_point.and_then(|s| s.selector) {
            Some(object_selector::Selector::Oid(oid)) => oid.hex,
            Some(object_selector::Selector::Revision(name)) => {
                crate::sanitize::validate_revision(&name.revision)?;
                name.revision
            }
            None => "HEAD".into(),
        };
        let mut args = vec!["branch".to_string()];
        if request.force {
            args.push("-f".into());
        }
        args.push(request.name.clone());
        args.push(revision);
        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: request.name,
        })
    }
}