use tracing::info;

use crate as git;

#[tracing::instrument(skip_all)]
pub fn validate_repo(
    repository: &git::OpenRepository,
    repo_details: &git::RepoDetails,
) -> Result<()> {
    let Some(push_remote) = repository.find_default_remote(git::repository::Direction::Push) else {
        return Err(Error::NoDefaultPushRemote);
    };
    let Some(fetch_remote) = repository.find_default_remote(git::repository::Direction::Fetch)
    else {
        return Err(Error::NoDefaultFetchRemote);
    };
    let git_remote = repo_details.git_remote();
    info!(config = %git_remote, push = %push_remote, fetch = %fetch_remote, "Check remotes match");
    if git_remote != push_remote {
        return Err(Error::MismatchDefaultPushRemote {
            found: push_remote,
            expected: git_remote,
        });
    }
    if git_remote != fetch_remote {
        return Err(Error::MismatchDefaultFetchRemote {
            found: fetch_remote,
            expected: git_remote,
        });
    }
    Ok(())
}

type Result<T> = core::result::Result<T, Error>;
#[derive(Debug, thiserror::Error)]
pub enum Error {
    #[error("no default push remote")]
    NoDefaultPushRemote,

    #[error("no default fetch remote")]
    NoDefaultFetchRemote,

    #[error("no url for default push remote")]
    NoUrlForDefaultPushRemote,

    #[error("no hostname for default push remote")]
    NoHostnameForDefaultPushRemote,

    #[error("unable to open repo: {0}")]
    UnableToOpenRepo(String),

    #[error("io")]
    Io(#[from] std::io::Error),

    #[error("MismatchDefaultPushRemote(found: {found}, expected: {expected})")]
    MismatchDefaultPushRemote {
        found: git::GitRemote,
        expected: git::GitRemote,
    },

    #[error("MismatchDefaultFetchRemote(found: {found}, expected: {expected})")]
    MismatchDefaultFetchRemote {
        found: git::GitRemote,
        expected: git::GitRemote,
    },
}