//! End-to-end: a real server on a loopback port, clients over HTTP.

use oxy_core::repo::{Repo, SignatureStatus};

use std::fs;

use std::net::TcpListener;

use std::path::Path;

fn write(root: &Path, rel: &str, content: &[u8]) {

    let p = root.join(rel);

    fs::create_dir_all(p.parent().unwrap()).unwrap();

    fs::write(p, content).unwrap();

}

/// Point `$OXY_HOME` at a throwaway directory once per test process so no

/// test reads or writes the developer's real user configuration or keys.

fn hermetic() {

    static ONCE: std::sync::Once = std::sync::Once::new();

    static DIR: std::sync::OnceLock<tempfile::TempDir> = std::sync::OnceLock::new();

    ONCE.call_once(|| {

        let d = tempfile::tempdir().unwrap();

        std::env::set_var("OXY_HOME", d.path());

        DIR.set(d).ok();

    });

}

fn start(root: &Path, tokens: Vec<String>) -> String {

    let listener = TcpListener::bind("127.0.0.1:0").unwrap();

    let port = listener.local_addr().unwrap().port();

    let cfg = oxy_server::ServerConfig { root: root.to_path_buf(), tokens };

    std::thread::spawn(move || oxy_server::run_blocking(listener, cfg).unwrap());

    format!("http://127.0.0.1:{port}")

}

#[test]

fn clone_push_pull_over_http() {

    hermetic();

    let dir = tempfile::tempdir().unwrap();

    let root = dir.path();

    let served = root.join("served");

    Repo::init(&served.join("origin")).unwrap();

    let base = start(&served, vec![]);

    let url = format!("{base}/origin");

    let mut a = Repo::clone(&url, &root.join("a")).unwrap().with_keys_dir(root.join("keys"));

    let (key, _) = a.create_identity("Ada", "[email protected]").unwrap();

    write(&root.join("a"), "f.txt", b"hello\n");

    let h1 = a.commit("hello", &[]).unwrap();

    let r = a.push("origin", false).unwrap();

    assert!(r[0].ok, "{}", r[0].reason);

    let origin = Repo::open(&served.join("origin")).unwrap();

    assert_eq!(origin.bookmark_heads().unwrap(), vec![h1]);

    assert!(matches!(origin.authenticate_change(&h1).unwrap(), SignatureStatus::Valid { key: k, sealed: true, .. } if k == key));

    let b = Repo::clone(&url, &root.join("b")).unwrap();

    assert_eq!(fs::read(root.join("b/f.txt")).unwrap(), b"hello\n");

    write(&root.join("b"), "g.txt", b"g\n");

    let h2 = b.commit("g", &[]).unwrap();

    assert!(b.push("origin", false).unwrap()[0].ok);

    let pr = a.pull("origin").unwrap();

    assert!(pr.changed && pr.checked_out);

    assert_eq!(fs::read(root.join("a/g.txt")).unwrap(), b"g\n");

    let mut heads = a.bookmark_heads().unwrap();

    heads.sort();

    let mut want = vec![h1, h2];

    want.sort();

    assert_eq!(heads, want);

    // Unknown repositories and names the server refuses are surfaced as errors.

    let err = Repo::clone(&format!("{base}/nope"), &root.join("c")).unwrap_err().to_string();

    assert!(err.contains("404"), "{err}");

    fs::create_dir_all(served.join(".hidden/.oxy")).unwrap();

    assert!(Repo::clone(&format!("{base}/.hidden"), &root.join("d")).unwrap_err().to_string().contains("404"));

}

#[test]

fn push_requires_a_token_when_configured() {

    hermetic();

    let dir = tempfile::tempdir().unwrap();

    let root = dir.path();

    let served = root.join("served");

    Repo::init(&served.join("origin")).unwrap();

    let base = start(&served, vec!["s3cret".into()]);

    let url = format!("{base}/origin");

    // Reads are open.

    let mut a = Repo::clone(&url, &root.join("a")).unwrap();

    write(&root.join("a"), "f.txt", b"x\n");

    a.commit("x", &[]).unwrap();

    let err = a.push("origin", false).unwrap_err().to_string();

    assert!(err.contains("401"), "{err}");

    a.config.set("remote.origin.token", "wrong").unwrap();

    a.save_config().unwrap();

    assert!(a.push("origin", false).unwrap_err().to_string().contains("401"));

    a.config.set("remote.origin.token", "s3cret").unwrap();

    a.save_config().unwrap();

    assert!(a.push("origin", false).unwrap()[0].ok);

    let origin = Repo::open(&served.join("origin")).unwrap();

    assert_eq!(origin.bookmark_heads().unwrap().len(), 1);

}