use crate::utils;

use clap::{arg, App, AppSettings, Arg, ArgMatches, ErrorKind};

#[cfg(feature = "suggestions")]
static DYM: &str =
    "error: Found argument '--optio' which wasn't expected, or isn't valid in this context

\tDid you mean '--option'?

\tIf you tried to supply `--optio` as a value rather than a flag, use `-- --optio`

USAGE:
    clap-test --option <opt>...

For more information try --help
";

#[cfg(feature = "suggestions")]
static DYM_ISSUE_1073: &str =
    "error: Found argument '--files-without-matches' which wasn't expected, or isn't valid in this context

\tDid you mean '--files-without-match'?

\tIf you tried to supply `--files-without-matches` as a value rather than a flag, use `-- --files-without-matches`

USAGE:
    ripgrep-616 --files-without-match

For more information try --help
";

#[test]
fn require_equals_fail() {
    let res = App::new("prog")
        .arg(
            Arg::new("cfg")
                .require_equals(true)
                .forbid_empty_values(true)
                .takes_value(true)
                .long("config"),
        )
        .try_get_matches_from(vec!["prog", "--config", "file.conf"]);
    assert!(res.is_err());
    assert_eq!(res.unwrap_err().kind, ErrorKind::NoEquals);
}

#[test]
fn require_equals_fail_message() {
    static NO_EQUALS: &str =
        "error: Equal sign is needed when assigning values to '--config=<cfg>'.

USAGE:
    prog [OPTIONS]

For more information try --help
";
    let app = App::new("prog").arg(
        Arg::new("cfg")
            .require_equals(true)
            .takes_value(true)
            .long("config"),
    );
    assert!(utils::compare_output(
        app,
        "prog --config file.conf",
        NO_EQUALS,
        true
    ));
}

#[test]
fn require_equals_min_values_zero() {
    let res = App::new("prog")
        .arg(
            Arg::new("cfg")
                .takes_value(true)
                .require_equals(true)
                .min_values(0)
                .long("config"),
        )
        .arg(Arg::new("cmd"))
        .try_get_matches_from(vec!["prog", "--config", "cmd"]);
    assert!(res.is_ok());
    let m = res.unwrap();
    assert!(m.is_present("cfg"));
    assert_eq!(m.value_of("cmd"), Some("cmd"));
}

#[test]
fn double_hyphen_as_value() {
    let res = App::new("prog")
        .arg(
            Arg::new("cfg")
                .takes_value(true)
                .allow_hyphen_values(true)
                .long("config"),
        )
        .try_get_matches_from(vec!["prog", "--config", "--"]);
    assert!(res.is_ok(), "{:?}", res);
    assert_eq!(res.unwrap().value_of("cfg"), Some("--"));
}

#[test]
fn require_equals_no_empty_values_fail() {
    let res = App::new("prog")
        .arg(
            Arg::new("cfg")
                .takes_value(true)
                .require_equals(true)
                .forbid_empty_values(true)
                .long("config"),
        )
        .arg(Arg::new("some"))
        .try_get_matches_from(vec!["prog", "--config=", "file.conf"]);
    assert!(res.is_err());
    assert_eq!(res.unwrap_err().kind, ErrorKind::EmptyValue);
}

#[test]
fn require_equals_empty_vals_pass() {
    let res = App::new("prog")
        .arg(
            Arg::new("cfg")
                .takes_value(true)
                .require_equals(true)
                .long("config"),
        )
        .try_get_matches_from(vec!["prog", "--config="]);
    assert!(res.is_ok());
}

#[test]
fn require_equals_pass() {
    let res = App::new("prog")
        .arg(
            Arg::new("cfg")
                .takes_value(true)
                .require_equals(true)
                .long("config"),
        )
        .try_get_matches_from(vec!["prog", "--config=file.conf"]);
    assert!(res.is_ok());
}

#[test]
fn stdin_char() {
    let r = App::new("opts")
        .arg(arg!(f: -f [flag] "some flag"))
        .try_get_matches_from(vec!["", "-f", "-"]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("f"));
    assert_eq!(m.value_of("f").unwrap(), "-");
}

#[test]
fn opts_using_short() {
    let r = App::new("opts")
        .args(&[
            arg!(f: -f [flag] "some flag"),
            arg!(c: -c [color] "some other flag"),
        ])
        .try_get_matches_from(vec!["", "-f", "some", "-c", "other"]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("f"));
    assert_eq!(m.value_of("f").unwrap(), "some");
    assert!(m.is_present("c"));
    assert_eq!(m.value_of("c").unwrap(), "other");
}

#[test]
fn lots_o_vals() {
    let r = App::new("opts")
        .arg(arg!(o: -o <opt> "some opt").multiple_values(true))
        .try_get_matches_from(vec![
            "", "-o", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some", "some", "some", "some", "some", "some", "some", "some", "some", "some",
            "some", "some",
        ]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("o"));
    assert_eq!(m.values_of("o").unwrap().count(), 297); // i.e. more than u8
}

#[test]
fn opts_using_long_space() {
    let r = App::new("opts")
        .args(&[
            arg!(--flag [flag] "some flag"),
            arg!(--color [color] "some other flag"),
        ])
        .try_get_matches_from(vec!["", "--flag", "some", "--color", "other"]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("flag"));
    assert_eq!(m.value_of("flag").unwrap(), "some");
    assert!(m.is_present("color"));
    assert_eq!(m.value_of("color").unwrap(), "other");
}

#[test]
fn opts_using_long_equals() {
    let r = App::new("opts")
        .args(&[
            arg!(--flag [flag] "some flag"),
            arg!(--color [color] "some other flag"),
        ])
        .try_get_matches_from(vec!["", "--flag=some", "--color=other"]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("flag"));
    assert_eq!(m.value_of("flag").unwrap(), "some");
    assert!(m.is_present("color"));
    assert_eq!(m.value_of("color").unwrap(), "other");
}

#[test]
fn opts_using_mixed() {
    let r = App::new("opts")
        .args(&[
            arg!(-f --flag [flag] "some flag"),
            arg!(-c --color [color] "some other flag"),
        ])
        .try_get_matches_from(vec!["", "-f", "some", "--color", "other"]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("flag"));
    assert_eq!(m.value_of("flag").unwrap(), "some");
    assert!(m.is_present("color"));
    assert_eq!(m.value_of("color").unwrap(), "other");
}

#[test]
fn opts_using_mixed2() {
    let r = App::new("opts")
        .args(&[
            arg!(-f --flag [flag] "some flag"),
            arg!(-c --color [color] "some other flag"),
        ])
        .try_get_matches_from(vec!["", "--flag=some", "-c", "other"]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("flag"));
    assert_eq!(m.value_of("flag").unwrap(), "some");
    assert!(m.is_present("color"));
    assert_eq!(m.value_of("color").unwrap(), "other");
}

#[test]
fn default_values_user_value() {
    let r = App::new("df")
        .arg(arg!(o: -o [opt] "some opt").default_value("default"))
        .try_get_matches_from(vec!["", "-o", "value"]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("o"));
    assert_eq!(m.value_of("o").unwrap(), "value");
}

#[test]
fn multiple_vals_pos_arg_equals() {
    let r = App::new("mvae")
        .arg(arg!(o: -o [opt] ... "some opt"))
        .arg(arg!([file] "some file"))
        .try_get_matches_from(vec!["", "-o=1", "some"]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("o"));
    assert_eq!(m.value_of("o").unwrap(), "1");
    assert!(m.is_present("file"));
    assert_eq!(m.value_of("file").unwrap(), "some");
}

#[test]
fn multiple_vals_pos_arg_delim() {
    let r = App::new("mvae")
        .arg(
            arg!(o: -o <opt> "some opt")
                .multiple_values(true)
                .use_delimiter(true),
        )
        .arg(arg!([file] "some file"))
        .try_get_matches_from(vec!["", "-o", "1,2", "some"]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("o"));
    assert_eq!(m.values_of("o").unwrap().collect::<Vec<_>>(), &["1", "2"]);
    assert!(m.is_present("file"));
    assert_eq!(m.value_of("file").unwrap(), "some");
}

#[test]
fn require_delims_no_delim() {
    let r = App::new("mvae")
        .arg(
            arg!(o: -o [opt] ... "some opt")
                .use_delimiter(true)
                .require_delimiter(true),
        )
        .arg(arg!([file] "some file"))
        .try_get_matches_from(vec!["mvae", "-o", "1", "2", "some"]);
    assert!(r.is_err());
    let err = r.unwrap_err();
    assert_eq!(err.kind, ErrorKind::UnknownArgument);
}

#[test]
fn require_delims() {
    let r = App::new("mvae")
        .arg(
            arg!(o: -o <opt> "some opt")
                .multiple_values(true)
                .use_delimiter(true)
                .require_delimiter(true),
        )
        .arg(arg!([file] "some file"))
        .try_get_matches_from(vec!["", "-o", "1,2", "some"]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("o"));
    assert_eq!(m.values_of("o").unwrap().collect::<Vec<_>>(), &["1", "2"]);
    assert!(m.is_present("file"));
    assert_eq!(m.value_of("file").unwrap(), "some");
}

#[test]
fn leading_hyphen_pass() {
    let r = App::new("mvae")
        .arg(
            arg!(o: -o <opt> "some opt")
                .multiple_values(true)
                .allow_hyphen_values(true),
        )
        .try_get_matches_from(vec!["", "-o", "-2", "3"]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("o"));
    assert_eq!(m.values_of("o").unwrap().collect::<Vec<_>>(), &["-2", "3"]);
}

#[test]
fn leading_hyphen_fail() {
    let r = App::new("mvae")
        .arg(arg!(o: -o <opt> "some opt"))
        .try_get_matches_from(vec!["", "-o", "-2"]);
    assert!(r.is_err());
    let m = r.unwrap_err();
    assert_eq!(m.kind, ErrorKind::UnknownArgument);
}

#[test]
fn leading_hyphen_with_flag_after() {
    let r = App::new("mvae")
        .arg(
            arg!(o: -o <opt> "some opt")
                .multiple_values(true)
                .allow_hyphen_values(true),
        )
        .arg(arg!(f: -f "some flag"))
        .try_get_matches_from(vec!["", "-o", "-2", "-f"]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("o"));
    assert_eq!(m.values_of("o").unwrap().collect::<Vec<_>>(), &["-2", "-f"]);
    assert!(!m.is_present("f"));
}

#[test]
fn leading_hyphen_with_flag_before() {
    let r = App::new("mvae")
        .arg(arg!(o: -o [opt] ... "some opt").allow_hyphen_values(true))
        .arg(arg!(f: -f "some flag"))
        .try_get_matches_from(vec!["", "-f", "-o", "-2"]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert!(m.is_present("o"));
    assert_eq!(m.values_of("o").unwrap().collect::<Vec<_>>(), &["-2"]);
    assert!(m.is_present("f"));
}

#[test]
fn leading_hyphen_with_only_pos_follows() {
    let r = App::new("mvae")
        .arg(
            arg!(o: -o [opt] ... "some opt")
                .number_of_values(1)
                .takes_value(true)
                .allow_hyphen_values(true),
        )
        .arg(arg!([arg] "some arg"))
        .try_get_matches_from(vec!["", "-o", "-2", "--", "val"]);
    assert!(r.is_ok(), "{:?}", r);
    let m = r.unwrap();
    assert!(m.is_present("o"));
    assert_eq!(m.values_of("o").unwrap().collect::<Vec<_>>(), &["-2"]);
    assert_eq!(m.value_of("arg"), Some("val"));
}

#[test]
#[cfg(feature = "suggestions")]
fn did_you_mean() {
    assert!(utils::compare_output(
        utils::complex_app(),
        "clap-test --optio=foo",
        DYM,
        true
    ));
}

#[test]
fn issue_1047_min_zero_vals_default_val() {
    let m = App::new("foo")
        .arg(
            Arg::new("del")
                .short('d')
                .long("del")
                .takes_value(true)
                .require_equals(true)
                .min_values(0)
                .default_missing_value("default"),
        )
        .get_matches_from(vec!["foo", "-d"]);
    assert_eq!(m.occurrences_of("del"), 1);
    assert_eq!(m.value_of("del"), Some("default"));
}

fn issue_1105_setup(argv: Vec<&'static str>) -> Result<ArgMatches, clap::Error> {
    App::new("opts")
        .arg(arg!(-o --option <opt> "some option"))
        .arg(arg!(--flag "some flag"))
        .try_get_matches_from(argv)
}

#[test]
fn issue_1105_empty_value_long_fail() {
    let r = issue_1105_setup(vec!["app", "--option", "--flag"]);
    assert!(r.is_err());
    assert_eq!(r.unwrap_err().kind, ErrorKind::EmptyValue);
}

#[test]
fn issue_1105_empty_value_long_explicit() {
    let r = issue_1105_setup(vec!["app", "--option", ""]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert_eq!(m.value_of("option"), Some(""));
}

#[test]
fn issue_1105_empty_value_long_equals() {
    let r = issue_1105_setup(vec!["app", "--option="]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert_eq!(m.value_of("option"), Some(""));
}

#[test]
fn issue_1105_empty_value_short_fail() {
    let r = issue_1105_setup(vec!["app", "-o", "--flag"]);
    assert!(r.is_err());
    assert_eq!(r.unwrap_err().kind, ErrorKind::EmptyValue);
}

#[test]
fn issue_1105_empty_value_short_explicit() {
    let r = issue_1105_setup(vec!["app", "-o", ""]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert_eq!(m.value_of("option"), Some(""));
}

#[test]
fn issue_1105_empty_value_short_equals() {
    let r = issue_1105_setup(vec!["app", "-o="]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert_eq!(m.value_of("option"), Some(""));
}

#[test]
fn issue_1105_empty_value_short_explicit_no_space() {
    let r = issue_1105_setup(vec!["app", "-o", ""]);
    assert!(r.is_ok());
    let m = r.unwrap();
    assert_eq!(m.value_of("option"), Some(""));
}

#[test]
#[cfg(feature = "suggestions")]
fn issue_1073_suboptimal_flag_suggestion() {
    let app = App::new("ripgrep-616")
        .arg(Arg::new("files-with-matches").long("files-with-matches"))
        .arg(Arg::new("files-without-match").long("files-without-match"));
    assert!(utils::compare_output(
        app,
        "ripgrep-616 --files-without-matches",
        DYM_ISSUE_1073,
        true
    ));
}

#[test]
fn short_non_ascii_no_space() {
    let matches = App::new("app")
        .arg(arg!(opt: -'磨' <opt>))
        .get_matches_from(&["test", "-磨VALUE"]);

    assert_eq!("VALUE", matches.value_of("opt").unwrap());
}

#[test]
fn short_eq_val_starts_with_eq() {
    let matches = App::new("app")
        .arg(arg!(opt: -f <opt>))
        .get_matches_from(&["test", "-f==value"]);

    assert_eq!("=value", matches.value_of("opt").unwrap());
}

#[test]
fn long_eq_val_starts_with_eq() {
    let matches = App::new("app")
        .arg(arg!(opt: --foo <opt>))
        .get_matches_from(&["test", "--foo==value"]);

    assert_eq!("=value", matches.value_of("opt").unwrap());
}

#[test]
fn issue_2022_get_flags_misuse() {
    let app = App::new("test")
        .help_heading(Some("test"))
        .arg(Arg::new("a").long("a").default_value("32"));
    let matches = app.get_matches_from(&[""]);
    assert!(matches.value_of("a").is_some())
}

#[test]
fn issue_2279() {
    let before_help_heading = App::new("app")
        .arg(Arg::new("foo").short('f').default_value("bar"))
        .help_heading(Some("This causes default_value to be ignored"))
        .get_matches_from(&[""]);

    assert_eq!(before_help_heading.value_of("foo"), Some("bar"));

    let after_help_heading = App::new("app")
        .help_heading(Some("This causes default_value to be ignored"))
        .arg(Arg::new("foo").short('f').default_value("bar"))
        .get_matches_from(&[""]);

    assert_eq!(after_help_heading.value_of("foo"), Some("bar"));
}

#[test]
fn infer_long_arg() {
    let app = App::new("test")
        .setting(AppSettings::InferLongArgs)
        .arg(Arg::new("racetrack").long("racetrack").alias("autobahn"))
        .arg(Arg::new("racecar").long("racecar").takes_value(true));

    let matches = app.clone().get_matches_from(&["test", "--racec=hello"]);
    assert!(!matches.is_present("racetrack"));
    assert_eq!(matches.value_of("racecar"), Some("hello"));

    let matches = app.clone().get_matches_from(&["test", "--racet"]);
    assert!(matches.is_present("racetrack"));
    assert_eq!(matches.value_of("racecar"), None);

    let matches = app.clone().get_matches_from(&["test", "--auto"]);
    assert!(matches.is_present("racetrack"));
    assert_eq!(matches.value_of("racecar"), None);

    let app = App::new("test")
        .setting(AppSettings::InferLongArgs)
        .arg(Arg::new("arg").long("arg"));

    let matches = app.clone().get_matches_from(&["test", "--"]);
    assert!(!matches.is_present("arg"));

    let matches = app.clone().get_matches_from(&["test", "--a"]);
    assert!(matches.is_present("arg"));
}