use crate::utils;

use clap::{error::ErrorKind, App, Arg, PossibleValue};

#[cfg(feature = "suggestions")]
static PV_ERROR: &str = "error: \"slo\" isn't a valid value for '-O <option>'
\t[possible values: slow, fast, \"ludicrous speed\"]

\tDid you mean \"slow\"?

USAGE:
    clap-test -O <option>

For more information try --help
";

#[cfg(not(feature = "suggestions"))]
static PV_ERROR: &str = "error: \"slo\" isn't a valid value for '-O <option>'
\t[possible values: slow, fast, \"ludicrous speed\"]

USAGE:
    clap-test -O <option>

For more information try --help
";

#[cfg(feature = "suggestions")]
static PV_ERROR_ESCAPED: &str = "error: \"ludicrous\" isn't a valid value for '-O <option>'
\t[possible values: slow, fast, \"ludicrous speed\"]

\tDid you mean \"ludicrous speed\"?

USAGE:
    clap-test -O <option>

For more information try --help
";

#[cfg(not(feature = "suggestions"))]
static PV_ERROR_ESCAPED: &str = "error: \"ludicrous\" isn't a valid value for '-O <option>'
\t[possible values: slow, fast, \"ludicrous speed\"]

USAGE:
    clap-test -O <option>

For more information try --help
";

#[test]
fn possible_values_of_positional() {
    let m = App::new("possible_values")
        .arg(Arg::new("positional").index(1).possible_value("test123"))
        .try_get_matches_from(vec!["myprog", "test123"]);

    assert!(m.is_ok(), "{}", m.unwrap_err());
    let m = m.unwrap();

    assert!(m.is_present("positional"));
    assert_eq!(m.value_of("positional"), Some("test123"));
}

#[test]
fn possible_value_arg_value() {
    let m = App::new("possible_values")
        .arg(
            Arg::new("arg_value").index(1).possible_value(
                PossibleValue::new("test123")
                    .hide(false)
                    .help("It's just a test"),
            ),
        )
        .try_get_matches_from(vec!["myprog", "test123"]);

    assert!(m.is_ok(), "{}", m.unwrap_err());
    let m = m.unwrap();

    assert!(m.is_present("arg_value"));
    assert_eq!(m.value_of("arg_value"), Some("test123"));
}

#[test]
fn possible_values_of_positional_fail() {
    let m = App::new("possible_values")
        .arg(Arg::new("positional").index(1).possible_value("test123"))
        .try_get_matches_from(vec!["myprog", "notest"]);

    assert!(m.is_err());
    assert_eq!(m.unwrap_err().kind(), ErrorKind::InvalidValue);
}

#[test]
fn possible_values_of_positional_multiple() {
    let m = App::new("possible_values")
        .arg(
            Arg::new("positional")
                .index(1)
                .takes_value(true)
                .possible_value("test123")
                .possible_value("test321")
                .multiple_values(true),
        )
        .try_get_matches_from(vec!["myprog", "test123", "test321"]);

    assert!(m.is_ok(), "{}", m.unwrap_err());
    let m = m.unwrap();

    assert!(m.is_present("positional"));
    assert_eq!(
        m.values_of("positional").unwrap().collect::<Vec<_>>(),
        vec!["test123", "test321"]
    );
}

#[test]
fn possible_values_of_positional_multiple_fail() {
    let m = App::new("possible_values")
        .arg(
            Arg::new("positional")
                .index(1)
                .takes_value(true)
                .possible_value("test123")
                .possible_value("test321")
                .multiple_values(true),
        )
        .try_get_matches_from(vec!["myprog", "test123", "notest"]);

    assert!(m.is_err());
    assert_eq!(m.unwrap_err().kind(), ErrorKind::InvalidValue);
}

#[test]
fn possible_values_of_option() {
    let m = App::new("possible_values")
        .arg(
            Arg::new("option")
                .short('o')
                .long("--option")
                .takes_value(true)
                .possible_value("test123"),
        )
        .try_get_matches_from(vec!["myprog", "--option", "test123"]);

    assert!(m.is_ok(), "{}", m.unwrap_err());
    let m = m.unwrap();

    assert!(m.is_present("option"));
    assert_eq!(m.value_of("option"), Some("test123"));
}

#[test]
fn possible_values_of_option_fail() {
    let m = App::new("possible_values")
        .arg(
            Arg::new("option")
                .short('o')
                .long("--option")
                .takes_value(true)
                .possible_value("test123"),
        )
        .try_get_matches_from(vec!["myprog", "--option", "notest"]);

    assert!(m.is_err());
    assert_eq!(m.unwrap_err().kind(), ErrorKind::InvalidValue);
}

#[test]
fn possible_values_of_option_multiple() {
    let m = App::new("possible_values")
        .arg(
            Arg::new("option")
                .short('o')
                .long("--option")
                .takes_value(true)
                .possible_value("test123")
                .possible_value("test321")
                .multiple_occurrences(true),
        )
        .try_get_matches_from(vec!["", "--option", "test123", "--option", "test321"]);

    assert!(m.is_ok(), "{}", m.unwrap_err());
    let m = m.unwrap();

    assert!(m.is_present("option"));
    assert_eq!(
        m.values_of("option").unwrap().collect::<Vec<_>>(),
        vec!["test123", "test321"]
    );
}

#[test]
fn possible_values_of_option_multiple_fail() {
    let m = App::new("possible_values")
        .arg(
            Arg::new("option")
                .short('o')
                .long("--option")
                .takes_value(true)
                .possible_value("test123")
                .possible_value("test321")
                .multiple_occurrences(true),
        )
        .try_get_matches_from(vec!["", "--option", "test123", "--option", "notest"]);

    assert!(m.is_err());
    assert_eq!(m.unwrap_err().kind(), ErrorKind::InvalidValue);
}

#[test]
fn possible_values_output() {
    assert!(utils::compare_output(
        App::new("test").arg(Arg::new("option").short('O').possible_values([
            "slow",
            "fast",
            "ludicrous speed"
        ])),
        "clap-test -O slo",
        PV_ERROR,
        true
    ));
}

#[test]
fn possible_values_alias_output() {
    assert!(utils::compare_output(
        App::new("test").arg(
            Arg::new("option")
                .short('O')
                .possible_value("slow")
                .possible_value(PossibleValue::new("fast").alias("fost"))
                .possible_value(PossibleValue::new("ludicrous speed").aliases(["ls", "lcs"]))
        ),
        "clap-test -O slo",
        PV_ERROR,
        true
    ));
}

#[test]
fn possible_values_hidden_output() {
    assert!(utils::compare_output(
        App::new("test").arg(
            Arg::new("option")
                .short('O')
                .possible_values(["slow", "fast"])
                .possible_value(PossibleValue::new("ludicrous speed"))
                .possible_value(PossibleValue::new("forbidden speed").hide(true))
        ),
        "clap-test -O slo",
        PV_ERROR,
        true
    ));
}

#[test]
fn escaped_possible_values_output() {
    assert!(utils::compare_output(
        App::new("test").arg(Arg::new("option").short('O').possible_values([
            "slow",
            "fast",
            "ludicrous speed"
        ])),
        "clap-test -O ludicrous",
        PV_ERROR_ESCAPED,
        true
    ));
}

#[test]
fn missing_possible_value_error() {
    assert!(utils::compare_output(
        App::new("test").arg(
            Arg::new("option")
                .short('O')
                .possible_value("slow")
                .possible_value(PossibleValue::new("fast").alias("fost"))
                .possible_value(PossibleValue::new("ludicrous speed"))
                .possible_value(PossibleValue::new("forbidden speed").hide(true))
        ),
        "clap-test -O",
        MISSING_PV_ERROR,
        true
    ));
}

static MISSING_PV_ERROR: &str =
    "error: The argument '-O <option>' requires a value but none was supplied
\t[possible values: slow, fast, \"ludicrous speed\"]

USAGE:
    clap-test [OPTIONS]

For more information try --help
";

#[test]
fn alias() {
    let m = App::new("pv")
        .arg(
            Arg::new("option")
                .short('o')
                .long("--option")
                .takes_value(true)
                .possible_value(PossibleValue::new("test123").alias("123"))
                .possible_value("test321")
                .ignore_case(true),
        )
        .try_get_matches_from(vec!["pv", "--option", "123"]);

    assert!(m.is_ok(), "{}", m.unwrap_err());
    assert!(m.unwrap().value_of("option").unwrap().eq("123"));
}

#[test]
fn aliases() {
    let m = App::new("pv")
        .arg(
            Arg::new("option")
                .short('o')
                .long("--option")
                .takes_value(true)
                .possible_value(PossibleValue::new("test123").aliases(["1", "2", "3"]))
                .possible_value("test321")
                .ignore_case(true),
        )
        .try_get_matches_from(vec!["pv", "--option", "2"]);

    assert!(m.is_ok(), "{}", m.unwrap_err());
    assert!(m.unwrap().value_of("option").unwrap().eq("2"));
}

#[test]
fn ignore_case() {
    let m = App::new("pv")
        .arg(
            Arg::new("option")
                .short('o')
                .long("--option")
                .takes_value(true)
                .possible_value("test123")
                .possible_value("test321")
                .ignore_case(true),
        )
        .try_get_matches_from(vec!["pv", "--option", "TeSt123"]);

    assert!(m.is_ok(), "{}", m.unwrap_err());
    assert!(m
        .unwrap()
        .value_of("option")
        .unwrap()
        .eq_ignore_ascii_case("test123"));
}

#[test]
fn ignore_case_fail() {
    let m = App::new("pv")
        .arg(
            Arg::new("option")
                .short('o')
                .long("--option")
                .takes_value(true)
                .possible_value("test123")
                .possible_value("test321"),
        )
        .try_get_matches_from(vec!["pv", "--option", "TeSt123"]);

    assert!(m.is_err());
    assert_eq!(m.unwrap_err().kind(), ErrorKind::InvalidValue);
}

#[test]
fn ignore_case_multiple() {
    let m = App::new("pv")
        .arg(
            Arg::new("option")
                .short('o')
                .long("--option")
                .takes_value(true)
                .possible_value("test123")
                .possible_value("test321")
                .multiple_values(true)
                .ignore_case(true),
        )
        .try_get_matches_from(vec!["pv", "--option", "TeSt123", "teST123", "tESt321"]);

    assert!(m.is_ok(), "{}", m.unwrap_err());
    assert_eq!(
        m.unwrap().values_of("option").unwrap().collect::<Vec<_>>(),
        &["TeSt123", "teST123", "tESt321"]
    );
}

#[test]
fn ignore_case_multiple_fail() {
    let m = App::new("pv")
        .arg(
            Arg::new("option")
                .short('o')
                .long("--option")
                .takes_value(true)
                .possible_value("test123")
                .possible_value("test321")
                .multiple_values(true),
        )
        .try_get_matches_from(vec!["pv", "--option", "test123", "teST123", "test321"]);

    assert!(m.is_err());
    assert_eq!(m.unwrap_err().kind(), ErrorKind::InvalidValue);
}