//! Tests of the `sausage` command line.

use std::path::PathBuf;
use std::process::{Command, Stdio};
use std::time::{SystemTime, UNIX_EPOCH};

fn empty_dir(label: &str) -> PathBuf {
    let nonce = SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_nanos();
    let dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
        .parent()
        .unwrap()
        .join("target/test-cli")
        .join(format!("{label}-{}-{nonce}", std::process::id()));
    std::fs::create_dir_all(&dir).unwrap();
    dir
}

/// Bare `sausage` (as in `nix run <flake>`) without a world starts `init`
/// for ./world instead of printing a usage error.
#[test]
fn bare_command_without_a_world_starts_init() {
    let dir = empty_dir("bare");
    let output = Command::new(env!("CARGO_BIN_EXE_sausage"))
        .current_dir(&dir)
        .env_remove("SAUSAGE_API")
        .env_remove("SAUSAGE_BASE_URL")
        .env_remove("SAUSAGE_MODEL")
        .env_remove("SAUSAGE_API_TOKEN")
        .stdin(Stdio::null())
        .output()
        .unwrap();
    let stdout = String::from_utf8_lossy(&output.stdout);
    let stderr = String::from_utf8_lossy(&output.stderr);
    // With no answers on stdin, init stops at the first required value.
    assert!(!output.status.success(), "stdout:\n{stdout}\nstderr:\n{stderr}");
    assert!(stdout.contains("No world in ./world yet"), "stdout:\n{stdout}\nstderr:\n{stderr}");
    assert!(stderr.contains("SAUSAGE_BASE_URL"), "stdout:\n{stdout}\nstderr:\n{stderr}");
    assert!(!stderr.contains("Usage:"), "stderr:\n{stderr}");
    // It asks before it creates anything.
    assert!(!dir.join("world").exists());
}