use std::path::Path;

use cuddle_please_misc::VcsClient;
use pretty_assertions::assert_eq;
use tracing_test::traced_test;

#[test]
#[traced_test]
fn exec_git_into_branch() {
    let tempdir = tempdir::TempDir::new("exec_git_into_branch").unwrap();

    setup_git(tempdir.path()).unwrap();

    add_commit(tempdir.path(), "first").unwrap();
    add_tag(tempdir.path(), "1.0.0").unwrap();

    add_commit(tempdir.path(), "second").unwrap();
    add_tag(tempdir.path(), "1.0.1").unwrap();

    let vcs = VcsClient::new_git(tempdir.path(), None::<String>, None::<String>).unwrap();
    vcs.checkout_branch().unwrap();

    let output = std::process::Command::new("git")
        .arg("branch")
        .current_dir(tempdir.path())
        .output()
        .unwrap();

    let stdout = std::str::from_utf8(&output.stdout).unwrap();
    let stderr = std::str::from_utf8(&output.stderr).unwrap();

    assert_eq!(
        "* cuddle-please/release
  main
",
        stdout
    );
    assert_eq!("", stderr);
}

#[test]
#[traced_test]
fn add_files_to_commit() {
    let tempdir = tempdir::TempDir::new("add_files_to_commit").unwrap();

    setup_git(tempdir.path()).unwrap();

    add_commit(tempdir.path(), "first").unwrap();
    add_tag(tempdir.path(), "1.0.0").unwrap();

    let vcs = VcsClient::new_git(tempdir.path(), None::<String>, None::<String>).unwrap();
    vcs.checkout_branch().unwrap();

    std::fs::File::create(tempdir.path().join("changelog")).unwrap();
    vcs.commit_and_push("with some file", true).unwrap();

    let output = std::process::Command::new("git")
        .arg("log")
        .current_dir(tempdir.path())
        .output()
        .unwrap();

    let stdout = std::str::from_utf8(&output.stdout).unwrap();
    let stderr = std::str::from_utf8(&output.stderr).unwrap();

    assert!(stdout.contains("chore(release): with some file"));
    assert_eq!("", stderr);
}
#[test]
#[traced_test]
fn reset_branch() {
    let tempdir = tempdir::TempDir::new("add_files_to_commit").unwrap();

    setup_git(tempdir.path()).unwrap();

    add_commit(tempdir.path(), "first").unwrap();
    add_tag(tempdir.path(), "1.0.0").unwrap();

    let vcs = VcsClient::new_git(tempdir.path(), None::<String>, None::<String>).unwrap();
    vcs.checkout_branch().unwrap();

    std::fs::File::create(tempdir.path().join("changelog-first")).unwrap();
    vcs.commit_and_push("v1.0.0", true).unwrap();

    exec_git(tempdir.path(), &["checkout", "main"]).unwrap();
    vcs.checkout_branch().unwrap();

    std::fs::File::create(tempdir.path().join("changelog-second")).unwrap();
    vcs.commit_and_push("v1.0.1", true).unwrap();

    let output = std::process::Command::new("git")
        .arg("log")
        .current_dir(tempdir.path())
        .output()
        .unwrap();

    let stdout = std::str::from_utf8(&output.stdout).unwrap();
    let stderr = std::str::from_utf8(&output.stderr).unwrap();

    assert!(stdout.contains("chore(release): v1.0.1"));
    assert!(!stdout.contains("chore(release): v1.0.0"));
    assert_eq!("", stderr);
}

fn add_tag(path: &Path, arg: &str) -> anyhow::Result<()> {
    add_everything(path)?;

    let output = std::process::Command::new("git")
        .arg("tag")
        .arg("-a")
        .arg(arg)
        .arg("-m")
        .arg(arg)
        .current_dir(path)
        .output()?;

    let stdout = std::str::from_utf8(&output.stdout)?;
    let stderr = std::str::from_utf8(&output.stderr)?;
    tracing::debug!(stdout = stdout, stderr = stderr, "git init");

    Ok(())
}

fn add_commit(path: &Path, arg: &str) -> anyhow::Result<()> {
    std::fs::File::create(path.join(arg))?;

    add_everything(path)?;

    let output = std::process::Command::new("git")
        .arg("commit")
        .arg("-m")
        .arg(arg)
        .current_dir(path)
        .output()?;

    let stdout = std::str::from_utf8(&output.stdout)?;
    let stderr = std::str::from_utf8(&output.stderr)?;
    tracing::debug!(stdout = stdout, stderr = stderr, "git init");

    Ok(())
}

fn add_everything(path: &Path) -> anyhow::Result<()> {
    let output = std::process::Command::new("git")
        .arg("add")
        .arg(".")
        .current_dir(path)
        .output()?;

    let stdout = std::str::from_utf8(&output.stdout)?;
    let stderr = std::str::from_utf8(&output.stderr)?;
    tracing::debug!(stdout = stdout, stderr = stderr, "git add .");

    Ok(())
}

fn setup_git(path: &Path) -> anyhow::Result<()> {
    let output = std::process::Command::new("git")
        .arg("init")
        .arg(".")
        .current_dir(path)
        .output()?;

    let stdout = std::str::from_utf8(&output.stdout)?;
    let stderr = std::str::from_utf8(&output.stderr)?;
    tracing::debug!(stdout = stdout, stderr = stderr, "git init");

    Ok(())
}

fn exec_git(path: &Path, args: &[&str]) -> anyhow::Result<()> {
    let checkout_branch = std::process::Command::new("git")
        .current_dir(path)
        .args(args)
        .output()?;

    let stdout = std::str::from_utf8(&checkout_branch.stdout)?;
    let stderr = std::str::from_utf8(&checkout_branch.stderr)?;
    tracing::debug!(stdout = stdout, stderr = stderr, "git {}", args.join(" "));

    Ok(())
}