use std::io::Write as _;
use std::process::{Command, Stdio};

#[test]
fn stdio_process_initializes_lists_capabilities_and_reports_parse_errors() {
    let home = tempfile::tempdir().unwrap();
    let mut child = Command::new(env!("CARGO_BIN_EXE_bds-mcp"))
        .env("HOME", home.path())
        .env("XDG_DATA_HOME", home.path().join("data"))
        .stdin(Stdio::piped())
        .stdout(Stdio::piped())
        .stderr(Stdio::piped())
        .spawn()
        .unwrap();
    let stdin = child.stdin.as_mut().unwrap();
    writeln!(stdin, r#"{{"jsonrpc":"2.0","id":1,"method":"initialize","params":{{"protocolVersion":"2025-06-18"}}}}"#).unwrap();
    writeln!(stdin, r#"{{"jsonrpc":"2.0","id":2,"method":"tools/list"}}"#).unwrap();
    writeln!(stdin, "not-json").unwrap();
    drop(child.stdin.take());
    let output = child.wait_with_output().unwrap();
    assert!(
        output.status.success(),
        "{}",
        String::from_utf8_lossy(&output.stderr)
    );
    let lines = String::from_utf8(output.stdout).unwrap();
    let responses = lines
        .lines()
        .map(|line| serde_json::from_str::<serde_json::Value>(line).unwrap())
        .collect::<Vec<_>>();
    assert_eq!(responses.len(), 3);
    assert_eq!(responses[0]["result"]["protocolVersion"], "2025-06-18");
    assert_eq!(
        responses[1]["result"]["tools"].as_array().unwrap().len(),
        12
    );
    assert_eq!(responses[2]["error"]["code"], -32700);
}