use crate::common::util::TestScenario;
use regex::Regex;
#[cfg(all(unix, not(target_os = "macos")))]
use uucore::process::geteuid;

#[test]
fn test_invalid_arg() {
    new_ucmd!().arg("--definitely-invalid").fails().code_is(1);
}

#[test]
fn test_date_email() {
    for param in ["--rfc-email", "--rfc-e", "-R"] {
        new_ucmd!().arg(param).succeeds();
    }
}

#[test]
fn test_date_rfc_3339() {
    let scene = TestScenario::new(util_name!());

    let rfc_regexp = concat!(
        r#"(\d+)-(0[1-9]|1[012])-(0[1-9]|[12]\d|3[01])\s([01]\d|2[0-3]):"#,
        r#"([0-5]\d):([0-5]\d|60)(\.\d+)?(([Zz])|([\+|\-]([01]\d|2[0-3])))"#
    );
    let re = Regex::new(rfc_regexp).unwrap();

    // Check that the output matches the regexp
    for param in ["--rfc-3339", "--rfc-3"] {
        scene
            .ucmd()
            .arg(format!("{param}=ns"))
            .succeeds()
            .stdout_matches(&re);

        scene
            .ucmd()
            .arg(format!("{param}=seconds"))
            .succeeds()
            .stdout_matches(&re);
    }
}

#[test]
fn test_date_rfc_3339_invalid_arg() {
    for param in ["--iso-3339", "--rfc-3"] {
        new_ucmd!().arg(format!("{param}=foo")).fails();
    }
}

#[test]
fn test_date_rfc_8601_default() {
    let re = Regex::new(r"^\d{4}-\d{2}-\d{2}\n$").unwrap();
    for param in ["--iso-8601", "--i"] {
        new_ucmd!().arg(param).succeeds().stdout_matches(&re);
    }
}

#[test]
fn test_date_rfc_8601() {
    let re = Regex::new(r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2},\d{9}[+-]\d{2}:\d{2}\n$").unwrap();
    for param in ["--iso-8601", "--i"] {
        new_ucmd!()
            .arg(format!("{param}=ns"))
            .succeeds()
            .stdout_matches(&re);
    }
}

#[test]
fn test_date_rfc_8601_invalid_arg() {
    for param in ["--iso-8601", "--i"] {
        new_ucmd!().arg(format!("{param}=@")).fails();
    }
}

#[test]
fn test_date_rfc_8601_second() {
    let re = Regex::new(r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}[+-]\d{2}:\d{2}\n$").unwrap();
    for param in ["--iso-8601", "--i"] {
        new_ucmd!()
            .arg(format!("{param}=second"))
            .succeeds()
            .stdout_matches(&re);
        new_ucmd!()
            .arg(format!("{param}=seconds"))
            .succeeds()
            .stdout_matches(&re);
    }
}

#[test]
fn test_date_rfc_8601_minute() {
    let re = Regex::new(r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}[+-]\d{2}:\d{2}\n$").unwrap();
    for param in ["--iso-8601", "--i"] {
        new_ucmd!()
            .arg(format!("{param}=minute"))
            .succeeds()
            .stdout_matches(&re);
        new_ucmd!()
            .arg(format!("{param}=minutes"))
            .succeeds()
            .stdout_matches(&re);
    }
}

#[test]
fn test_date_rfc_8601_hour() {
    let re = Regex::new(r"^\d{4}-\d{2}-\d{2}T\d{2}[+-]\d{2}:\d{2}\n$").unwrap();
    for param in ["--iso-8601", "--i"] {
        new_ucmd!()
            .arg(format!("{param}=hour"))
            .succeeds()
            .stdout_matches(&re);
        new_ucmd!()
            .arg(format!("{param}=hours"))
            .succeeds()
            .stdout_matches(&re);
    }
}

#[test]
fn test_date_rfc_8601_date() {
    let re = Regex::new(r"^\d{4}-\d{2}-\d{2}\n$").unwrap();
    for param in ["--iso-8601", "--i"] {
        new_ucmd!()
            .arg(format!("{param}=date"))
            .succeeds()
            .stdout_matches(&re);
    }
}

#[test]
fn test_date_utc() {
    for param in ["--universal", "--utc", "--uni", "--u"] {
        new_ucmd!().arg(param).succeeds();
    }
}

#[test]
fn test_date_format_y() {
    let scene = TestScenario::new(util_name!());

    let mut re = Regex::new(r"^\d{4}\n$").unwrap();
    scene.ucmd().arg("+%Y").succeeds().stdout_matches(&re);

    re = Regex::new(r"^\d{2}\n$").unwrap();
    scene.ucmd().arg("+%y").succeeds().stdout_matches(&re);
}

#[test]
fn test_date_format_m() {
    let scene = TestScenario::new(util_name!());

    let mut re = Regex::new(r"\S+").unwrap();
    scene.ucmd().arg("+%b").succeeds().stdout_matches(&re);

    re = Regex::new(r"^\d{2}\n$").unwrap();
    scene.ucmd().arg("+%m").succeeds().stdout_matches(&re);
}

#[test]
fn test_date_format_day() {
    let scene = TestScenario::new(util_name!());

    let mut re = Regex::new(r"\S+").unwrap();
    scene.ucmd().arg("+%a").succeeds().stdout_matches(&re);

    re = Regex::new(r"\S+").unwrap();
    scene.ucmd().arg("+%A").succeeds().stdout_matches(&re);

    re = Regex::new(r"^\d{1}\n$").unwrap();
    scene.ucmd().arg("+%u").succeeds().stdout_matches(&re);
}

#[test]
fn test_date_format_full_day() {
    let re = Regex::new(r"\S+ \d{4}-\d{2}-\d{2}").unwrap();
    new_ucmd!()
        .arg("+'%a %Y-%m-%d'")
        .succeeds()
        .stdout_matches(&re);
}

#[test]
fn test_date_issue_3780() {
    new_ucmd!().arg("+%Y-%m-%d %H-%M-%S%:::z").succeeds();
}

#[test]
fn test_date_nano_seconds() {
    // %N     nanoseconds (000000000..999999999)
    let re = Regex::new(r"^\d{1,9}\n$").unwrap();
    new_ucmd!().arg("+%N").succeeds().stdout_matches(&re);
}

#[test]
fn test_date_format_without_plus() {
    // [+FORMAT]
    new_ucmd!()
        .arg("%s")
        .fails()
        .stderr_contains("date: invalid date '%s'")
        .code_is(1);
}

#[test]
fn test_date_format_literal() {
    new_ucmd!().arg("+%%s").succeeds().stdout_is("%s\n");
    new_ucmd!().arg("+%%N").succeeds().stdout_is("%N\n");
}

#[test]
#[cfg(all(unix, not(target_os = "macos")))]
fn test_date_set_valid() {
    if geteuid() == 0 {
        new_ucmd!()
            .arg("--set")
            .arg("2020-03-12 13:30:00+08:00")
            .succeeds()
            .no_stdout()
            .no_stderr();
    }
}

#[test]
#[cfg(any(windows, all(unix, not(target_os = "macos"))))]
fn test_date_set_invalid() {
    let result = new_ucmd!().arg("--set").arg("123abcd").fails();
    result.no_stdout();
    assert!(result.stderr_str().starts_with("date: invalid date "));
}

#[test]
#[cfg(all(unix, not(any(target_os = "android", target_os = "macos"))))]
fn test_date_set_permissions_error() {
    if !(geteuid() == 0 || uucore::os::is_wsl_1()) {
        let result = new_ucmd!()
            .arg("--set")
            .arg("2020-03-11 21:45:00+08:00")
            .fails();
        result.no_stdout();
        assert!(result.stderr_str().starts_with("date: cannot set date: "));
    }
}

#[test]
#[cfg(target_os = "macos")]
fn test_date_set_mac_unavailable() {
    let result = new_ucmd!()
        .arg("--set")
        .arg("2020-03-11 21:45:00+08:00")
        .fails();
    result.no_stdout();
    assert!(result
        .stderr_str()
        .starts_with("date: setting the date is not supported by macOS"));
}

#[test]
#[cfg(all(unix, not(target_os = "macos")))]
/// TODO: expected to fail currently; change to succeeds() when required.
fn test_date_set_valid_2() {
    if geteuid() == 0 {
        let result = new_ucmd!()
            .arg("--set")
            .arg("Sat 20 Mar 2021 14:53:01 AWST") // spell-checker:disable-line
            .fails();
        result.no_stdout();
        assert!(result.stderr_str().starts_with("date: invalid date "));
    }
}

#[test]
fn test_date_for_invalid_file() {
    let result = new_ucmd!().arg("--file").arg("invalid_file").fails();
    result.no_stdout();
    assert_eq!(
        result.stderr_str().trim(),
        "date: invalid_file: No such file or directory",
    );
}

#[test]
#[cfg(unix)]
fn test_date_for_no_permission_file() {
    let (at, mut ucmd) = at_and_ucmd!();
    const FILE: &str = "file-no-perm-1";

    use std::os::unix::fs::PermissionsExt;
    let file = std::fs::OpenOptions::new()
        .create(true)
        .write(true)
        .open(at.plus(FILE))
        .unwrap();
    file.set_permissions(std::fs::Permissions::from_mode(0o222))
        .unwrap();
    let result = ucmd.arg("--file").arg(FILE).fails();
    result.no_stdout();
    assert_eq!(
        result.stderr_str().trim(),
        format!("date: {FILE}: Permission denied")
    );
}

#[test]
fn test_date_for_dir_as_file() {
    let result = new_ucmd!().arg("--file").arg("/").fails();
    result.no_stdout();
    assert_eq!(
        result.stderr_str().trim(),
        "date: expected file, got directory '/'",
    );
}

#[test]
fn test_date_for_file() {
    let (at, mut ucmd) = at_and_ucmd!();
    let file = "test_date_for_file";
    at.touch(file);
    ucmd.arg("--file").arg(file).succeeds();
}

#[test]
#[cfg(all(unix, not(target_os = "macos")))]
/// TODO: expected to fail currently; change to succeeds() when required.
fn test_date_set_valid_3() {
    if geteuid() == 0 {
        let result = new_ucmd!()
            .arg("--set")
            .arg("Sat 20 Mar 2021 14:53:01") // Local timezone
            .fails();
        result.no_stdout();
        assert!(result.stderr_str().starts_with("date: invalid date "));
    }
}

#[test]
#[cfg(all(unix, not(target_os = "macos")))]
/// TODO: expected to fail currently; change to succeeds() when required.
fn test_date_set_valid_4() {
    if geteuid() == 0 {
        let result = new_ucmd!()
            .arg("--set")
            .arg("2020-03-11 21:45:00") // Local timezone
            .fails();
        result.no_stdout();
        assert!(result.stderr_str().starts_with("date: invalid date "));
    }
}

#[test]
fn test_invalid_format_string() {
    let result = new_ucmd!().arg("+%!").fails();
    result.no_stdout();
    assert!(result.stderr_str().starts_with("date: invalid format "));
}

#[test]
fn test_unsupported_format() {
    let result = new_ucmd!().arg("+%#z").fails();
    result.no_stdout();
    assert!(result.stderr_str().starts_with("date: invalid format %#z"));
}

#[test]
fn test_date_string_human() {
    let date_formats = vec![
        "1 year ago",
        "1 year",
        "2 months ago",
        "15 days ago",
        "1 week ago",
        "5 hours ago",
        "30 minutes ago",
        "10 seconds",
    ];
    let re = Regex::new(r"^\d{4}-\d{2}-\d{2} \d{2}:\d{2}\n$").unwrap();
    for date_format in date_formats {
        new_ucmd!()
            .arg("-d")
            .arg(date_format)
            .arg("+%Y-%m-%d %S:%M")
            .succeeds()
            .stdout_matches(&re);
    }
}

#[test]
fn test_invalid_date_string() {
    new_ucmd!()
        .arg("-d")
        .arg("foo")
        .fails()
        .no_stdout()
        .stderr_contains("invalid date");
}