use rstest::rstest;

// spell-checker:ignore dont
use crate::common::util::TestScenario;

use std::time::{Duration, Instant};

#[test]
fn test_invalid_time_interval() {
    new_ucmd!()
        .arg("xyz")
        .fails()
        .usage_error("invalid time interval 'xyz': Invalid input: 'xyz' at position 1");
    new_ucmd!()
        .args(&["--", "-1"])
        .fails()
        .usage_error("invalid time interval '-1': Number was negative");
}

#[test]
fn test_sleep_no_suffix() {
    let millis_100 = Duration::from_millis(100);
    let before_test = Instant::now();

    new_ucmd!().args(&["0.1"]).succeeds().stdout_only("");

    let duration = before_test.elapsed();
    assert!(duration >= millis_100);
}

#[test]
fn test_sleep_s_suffix() {
    let millis_100 = Duration::from_millis(100);
    let before_test = Instant::now();

    new_ucmd!().args(&["0.1s"]).succeeds().stdout_only("");

    let duration = before_test.elapsed();
    assert!(duration >= millis_100);
}

#[test]
fn test_sleep_m_suffix() {
    let millis_600 = Duration::from_millis(600);
    let before_test = Instant::now();

    new_ucmd!().args(&["0.01m"]).succeeds().stdout_only("");

    let duration = before_test.elapsed();
    assert!(duration >= millis_600);
}

#[test]
fn test_sleep_h_suffix() {
    let millis_360 = Duration::from_millis(360);
    let before_test = Instant::now();

    new_ucmd!().args(&["0.0001h"]).succeeds().stdout_only("");

    let duration = before_test.elapsed();
    assert!(duration >= millis_360);
}

#[test]
fn test_sleep_negative_duration() {
    new_ucmd!().args(&["-1"]).fails();
    new_ucmd!().args(&["-1s"]).fails();
    new_ucmd!().args(&["-1m"]).fails();
    new_ucmd!().args(&["-1h"]).fails();
    new_ucmd!().args(&["-1d"]).fails();
}

#[test]
fn test_sleep_zero_duration() {
    new_ucmd!().args(&["0"]).succeeds().stdout_only("");
    new_ucmd!().args(&["0s"]).succeeds().stdout_only("");
    new_ucmd!().args(&["0m"]).succeeds().stdout_only("");
    new_ucmd!().args(&["0h"]).succeeds().stdout_only("");
    new_ucmd!().args(&["0d"]).succeeds().stdout_only("");
}

#[test]
fn test_sleep_no_argument() {
    new_ucmd!().fails().usage_error("missing operand");
}

#[test]
fn test_sleep_sum_duration_same_suffix() {
    let millis_200 = Duration::from_millis(100 + 100);
    let before_test = Instant::now();

    new_ucmd!()
        .args(&["0.1s", "0.1s"])
        .succeeds()
        .stdout_only("");

    let duration = before_test.elapsed();
    assert!(duration >= millis_200);
}

#[test]
fn test_sleep_sum_duration_different_suffix() {
    let millis_700 = Duration::from_millis(100 + 600);
    let before_test = Instant::now();

    new_ucmd!()
        .args(&["0.1s", "0.01m"])
        .succeeds()
        .stdout_only("");

    let duration = before_test.elapsed();
    assert!(duration >= millis_700);
}

#[test]
fn test_sleep_sum_duration_many() {
    let millis_900 = Duration::from_millis(100 + 100 + 300 + 400);
    let before_test = Instant::now();

    new_ucmd!()
        .args(&["0.1s", "0.1s", "0.3s", "0.4s"])
        .succeeds()
        .stdout_only("");

    let duration = before_test.elapsed();
    assert!(duration >= millis_900);
}

#[test]
fn test_sleep_wrong_time() {
    new_ucmd!().args(&["0.1s", "abc"]).fails();
}

#[test]
fn test_sleep_when_single_input_exceeds_max_duration_then_no_error() {
    let mut child = new_ucmd!()
        .arg(format!("{}", u64::MAX as u128 + 1))
        .timeout(Duration::from_secs(10))
        .run_no_wait();

    #[cfg(unix)]
    child
        .delay(100)
        .kill()
        .make_assertion()
        .with_current_output()
        .signal_is(9) // make sure it was us who terminated the process
        .no_output();
    #[cfg(windows)]
    child
        .delay(100)
        .kill()
        .make_assertion()
        .with_current_output()
        .failure()
        .no_output();
}

#[test]
fn test_sleep_when_multiple_inputs_exceed_max_duration_then_no_error() {
    let mut child = new_ucmd!()
        .arg(format!("{}", u64::MAX))
        .arg("1")
        .timeout(Duration::from_secs(10))
        .run_no_wait();

    #[cfg(unix)]
    child
        .delay(100)
        .kill()
        .make_assertion()
        .with_current_output()
        .signal_is(9) // make sure it was us who terminated the process
        .no_output();
    #[cfg(windows)]
    child
        .delay(100)
        .kill()
        .make_assertion()
        .with_current_output()
        .failure()
        .no_output();
}

#[rstest]
#[case::whitespace_prefix(" 0.1s")]
#[case::multiple_whitespace_prefix("   0.1s")]
#[case::whitespace_suffix("0.1s ")]
#[case::mixed_newlines_spaces_tabs("\n\t0.1s \n ")]
fn test_sleep_when_input_has_whitespace_then_no_error(#[case] input: &str) {
    new_ucmd!()
        .arg(input)
        .timeout(Duration::from_secs(10))
        .succeeds()
        .no_output();
}

#[rstest]
#[case::only_space(" ")]
#[case::only_tab("\t")]
#[case::only_newline("\n")]
fn test_sleep_when_input_has_only_whitespace_then_error(#[case] input: &str) {
    new_ucmd!()
        .arg(input)
        .timeout(Duration::from_secs(10))
        .fails()
        .usage_error(format!(
            "invalid time interval '{input}': Found only whitespace in input"
        ));
}

#[test]
fn test_sleep_when_multiple_input_some_with_error_then_shows_all_errors() {
    let expected = "invalid time interval 'abc': Invalid input: 'abc' at position 1\n\
        sleep: invalid time interval '1years': Invalid time unit: 'years' at position 2\n\
        sleep: invalid time interval ' ': Found only whitespace in input";

    // Even if one of the arguments is valid, but the rest isn't, we should still fail and exit early.
    // So, the timeout of 10 seconds ensures we haven't executed `thread::sleep` with the only valid
    // interval of `100000.0` seconds.
    new_ucmd!()
        .args(&["abc", "100000.0", "1years", " "])
        .timeout(Duration::from_secs(10))
        .fails()
        .usage_error(expected);
}

#[test]
fn test_negative_interval() {
    new_ucmd!()
        .args(&["--", "-1"])
        .fails()
        .usage_error("invalid time interval '-1': Number was negative");
}
