use std::path::PathBuf;
use std::process::Command;
use std::sync::atomic::{AtomicUsize, Ordering};

static NEXT_FILE: AtomicUsize = AtomicUsize::new(0);

struct SourceFile(PathBuf);

impl SourceFile {
    fn new(content: &[u8]) -> Self {
        let path = std::env::temp_dir().join(format!(
            "aster-parse-{}-{}.endor",
            std::process::id(),
            NEXT_FILE.fetch_add(1, Ordering::Relaxed)
        ));
        std::fs::write(&path, content).unwrap();
        Self(path)
    }
}

impl Drop for SourceFile {
    fn drop(&mut self) {
        let _ = std::fs::remove_file(&self.0);
    }
}

#[test]
fn parse_command_prints_ast_without_executing_source() {
    let source = SourceFile::new("function 表示(): String { return 未定義() }".as_bytes());
    let output = Command::new(env!("CARGO_BIN_EXE_cli"))
        .arg("parse")
        .arg(&source.0)
        .output()
        .unwrap();
    assert!(
        output.status.success(),
        "{}",
        String::from_utf8_lossy(&output.stderr)
    );
    let stdout = String::from_utf8(output.stdout).unwrap();
    assert!(stdout.contains("表示"));
    assert!(stdout.contains("未定義"));
    assert!(stdout.contains("Call"));
}

#[test]
fn parse_command_reports_source_locations_and_rejects_invalid_utf8() {
    let source = SourceFile::new(b"function f(): Number {\n  return )\n}");
    let output = Command::new(env!("CARGO_BIN_EXE_cli"))
        .arg("parse")
        .arg(&source.0)
        .output()
        .unwrap();
    assert!(!output.status.success());
    assert!(output.stdout.is_empty());
    let stderr = String::from_utf8(output.stderr).unwrap();
    assert!(stderr.contains(":2:10:"), "{stderr}");
    assert!(stderr.contains("expected"));
    let source = SourceFile::new(&[0xff]);
    let output = Command::new(env!("CARGO_BIN_EXE_cli"))
        .arg("parse")
        .arg(&source.0)
        .output()
        .unwrap();
    assert!(!output.status.success());
    assert!(output.stdout.is_empty());
}