#[macro_use]
extern crate clap;

use clap::ErrorKind;

#[test]
fn basic() {
    clap_app!(claptests =>
        (version: "0.1")
        (about: "tests clap library")
        (author: "Kevin K. <kbknapp@gmail.com>")
        (@arg opt: -o --option +takes_value ... "tests options")
        (@arg positional: index(1) "tests positionals")
        (@arg flag: -f --flag ... +global "tests flags")
        (@arg flag2: -F conflicts_with[flag] requires[option2]
            "tests flags with exclusions")
        (@arg option2: --long_option_2 conflicts_with[option] requires[positional2]
            "tests long options with exclusions")
        (@arg positional2: index(2) "tests positionals with exclusions")
        (@arg option3: -O --Option +takes_value possible_value[fast slow]
            "tests options with specific value sets")
        (@arg positional3: index(3) ... possible_value[vi emacs]
            "tests positionals with specific values")
        (@arg multvals: --multvals +takes_value value_name[one two]
            "Tests multiple values, not mult occs")
        (@arg multvalsmo: --multvalsmo ... +takes_value value_name[one two]
            "Tests multiple values, not mult occs")
        (@arg minvals: --minvals2 min_values(1) ... +takes_value "Tests 2 min vals")
        (@arg maxvals: --maxvals3 ... +takes_value max_values(3) "Tests 3 max vals")
        (@subcommand subcmd =>
            (about: "tests subcommands")
            (version: "0.1")
            (author: "Kevin K. <kbknapp@gmail.com>")
            (@arg scoption: -o --option ... +takes_value "tests options")
            (@arg scpositional: index(1) "tests positionals"))
    );
}

#[test]
fn quoted_app_name() {
    let app = clap_app!(("app name with spaces-and-hyphens") =>
        (version: "0.1")
        (about: "tests clap library")
        (author: "Kevin K. <kbknapp@gmail.com>")
        (@arg opt: -o --option +takes_value ... "tests options")
        (@arg positional: index(1) "tests positionals")
        (@arg flag: -f --flag ... +global "tests flags")
        (@arg flag2: -F conflicts_with[flag] requires[option2]
            "tests flags with exclusions")
        (@arg option2: --long_option_2 conflicts_with[option] requires[positional2]
            "tests long options with exclusions")
        (@arg positional2: index(2) "tests positionals with exclusions")
        (@arg option3: -O --Option +takes_value possible_value[fast slow]
            "tests options with specific value sets")
        (@arg positional3: index(3) ... possible_value[vi emacs]
            "tests positionals with specific values")
        (@arg multvals: --multvals +takes_value value_name[one two]
            "Tests multiple values, not mult occs")
        (@arg multvalsmo: --multvalsmo ... +takes_value value_name[one two]
            "Tests multiple values, not mult occs")
        (@arg minvals: --minvals2 min_values(1) ... +takes_value "Tests 2 min vals")
        (@arg maxvals: --maxvals3 ... +takes_value max_values(3) "Tests 3 max vals")
        (@subcommand subcmd =>
            (about: "tests subcommands")
            (version: "0.1")
            (author: "Kevin K. <kbknapp@gmail.com>")
            (@arg scoption: -o --option ... +takes_value "tests options")
            (@arg scpositional: index(1) "tests positionals"))
    );

    assert_eq!(app.p.meta.name, "app name with spaces-and-hyphens");

    let mut help_text = vec![];
    app.write_help(&mut help_text).expect("Could not write help text.");
    let help_text = String::from_utf8(help_text).expect("Help text is not valid utf-8");
    assert!(help_text.starts_with("app name with spaces-and-hyphens 0.1\n"));
}

#[test]
fn quoted_arg_long_name() {
    let app = clap_app!(claptests =>
        (version: "0.1")
        (about: "tests clap library")
        (author: "Kevin K. <kbknapp@gmail.com>")
        (@arg opt: -o --option +takes_value ... "tests options")
        (@arg positional: index(1) "tests positionals")
        (@arg flag: -f --flag ... +global "tests flags")
        (@arg flag2: -F conflicts_with[flag] requires[option2]
            "tests flags with exclusions")
        (@arg option2: --("long-option-2") conflicts_with[option] requires[positional2]
            "tests long options with exclusions")
        (@arg positional2: index(2) "tests positionals with exclusions")
        (@arg option3: -O --Option +takes_value possible_value[fast slow]
            "tests options with specific value sets")
        (@arg positional3: index(3) ... possible_value[vi emacs]
            "tests positionals with specific values")
        (@arg multvals: --multvals +takes_value value_name[one two]
            "Tests multiple values, not mult occs")
        (@arg multvalsmo: --multvalsmo ... +takes_value value_name[one two]
            "Tests multiple values, not mult occs")
        (@arg minvals: --minvals2 min_values(1) ... +takes_value "Tests 2 min vals")
        (@arg maxvals: --maxvals3 ... +takes_value max_values(3) "Tests 3 max vals")
        (@subcommand subcmd =>
            (about: "tests subcommands")
            (version: "0.1")
            (author: "Kevin K. <kbknapp@gmail.com>")
            (@arg scoption: -o --option ... +takes_value "tests options")
            (@arg scpositional: index(1) "tests positionals"))
    );

    let matches = app.get_matches_from_safe(vec!["bin_name", "value1", "value2", "--long-option-2"])
        .expect("Expected to successfully match the given args.");
    assert!(matches.is_present("option2"));
}

#[test]
fn quoted_arg_name() {
    let app = clap_app!(claptests =>
        (version: "0.1")
        (about: "tests clap library")
        (author: "Kevin K. <kbknapp@gmail.com>")
        (@arg opt: -o --option +takes_value ... "tests options")
        (@arg ("positional-arg"): index(1) "tests positionals")
        (@arg flag: -f --flag ... +global "tests flags")
        (@arg flag2: -F conflicts_with[flag] requires[option2]
            "tests flags with exclusions")
        (@arg option2: --("long-option-2") conflicts_with[option] requires[positional2]
            "tests long options with exclusions")
        (@arg positional2: index(2) "tests positionals with exclusions")
        (@arg option3: -O --Option +takes_value possible_value[fast slow]
            "tests options with specific value sets")
        (@arg ("positional-3"): index(3) ... possible_value[vi emacs]
            "tests positionals with specific values")
        (@arg multvals: --multvals +takes_value value_name[one two]
            "Tests multiple values, not mult occs")
        (@arg multvalsmo: --multvalsmo ... +takes_value value_name[one two]
            "Tests multiple values, not mult occs")
        (@arg minvals: --minvals2 min_values(1) ... +takes_value "Tests 2 min vals")
        (@arg maxvals: --maxvals3 ... +takes_value max_values(3) "Tests 3 max vals")
        (@subcommand subcmd =>
            (about: "tests subcommands")
            (version: "0.1")
            (author: "Kevin K. <kbknapp@gmail.com>")
            (@arg scoption: -o --option ... +takes_value "tests options")
            (@arg scpositional: index(1) "tests positionals"))
    );

    let matches = app.get_matches_from_safe(vec!["bin_name", "value1", "value2", "--long-option-2"])
        .expect("Expected to successfully match the given args.");
    assert!(matches.is_present("option2"));
}

#[test]
fn group_macro() {
    let app = clap_app!(claptests =>
        (version: "0.1")
        (about: "tests clap library")
        (author: "Kevin K. <kbknapp@gmail.com>")
             (@group difficulty =>
                 (@arg hard: -h --hard "Sets hard mode")
                 (@arg normal: -n --normal "Sets normal mode")
                 (@arg easy: -e --easy "Sets easy mode")
             )
    );

    let result = app.get_matches_from_safe(vec!["bin_name", "--hard"]);
    assert!(result.is_ok());
    let matches = result.expect("Expected to successfully match the given args.");
    assert!(matches.is_present("difficulty"));
    assert!(matches.is_present("hard"));
}

#[test]
fn group_macro_set_multiple() {
    let app = clap_app!(claptests =>
        (version: "0.1")
        (about: "tests clap library")
        (author: "Kevin K. <kbknapp@gmail.com>")
             (@group difficulty +multiple =>
                 (@arg hard: -h --hard "Sets hard mode")
                 (@arg normal: -n --normal "Sets normal mode")
                 (@arg easy: -e --easy "Sets easy mode")
             )
    );

    let result = app.get_matches_from_safe(vec!["bin_name", "--hard", "--easy"]);
    assert!(result.is_ok());
    let matches = result.expect("Expected to successfully match the given args.");
    assert!(matches.is_present("difficulty"));
    assert!(matches.is_present("hard"));
    assert!(matches.is_present("easy"));
    assert!(!matches.is_present("normal"));
}

#[test]
fn group_macro_set_not_multiple() {
    let app = clap_app!(claptests =>
        (version: "0.1")
        (about: "tests clap library")
        (author: "Kevin K. <kbknapp@gmail.com>")
             (@group difficulty !multiple =>
                 (@arg hard: -h --hard "Sets hard mode")
                 (@arg normal: -n --normal "Sets normal mode")
                 (@arg easy: -e --easy "Sets easy mode")
             )
    );

    let result = app.get_matches_from_safe(vec!["bin_name", "--hard", "--easy"]);
    assert!(result.is_err());
    let err = result.unwrap_err();
    assert_eq!(err.kind, ErrorKind::ArgumentConflict);
}

#[test]
fn group_macro_set_required() {
    let app = clap_app!(claptests =>
        (version: "0.1")
        (about: "tests clap library")
        (author: "Kevin K. <kbknapp@gmail.com>")
             (@group difficulty +required =>
                 (@arg hard: -h --hard "Sets hard mode")
                 (@arg normal: -n --normal "Sets normal mode")
                 (@arg easy: -e --easy "Sets easy mode")
             )
    );

    let result = app.get_matches_from_safe(vec!["bin_name"]);
    assert!(result.is_err());
    let err = result.unwrap_err();
    assert_eq!(err.kind, ErrorKind::MissingRequiredArgument);
}

#[test]
fn group_macro_set_not_required() {
    let app = clap_app!(claptests =>
        (version: "0.1")
        (about: "tests clap library")
        (author: "Kevin K. <kbknapp@gmail.com>")
             (@group difficulty !required =>
                 (@arg hard: -h --hard "Sets hard mode")
                 (@arg normal: -n --normal "Sets normal mode")
                 (@arg easy: -e --easy "Sets easy mode")
             )
    );

    let result = app.get_matches_from_safe(vec!["bin_name"]);
    assert!(result.is_ok());
    let matches = result.expect("Expected to successfully match the given args.");
    assert!(!matches.is_present("difficulty"));
}

#[test]
fn multiarg() {
    let app = || clap_app!(
        claptests =>
            (@arg flag: --flag "value")
            (@arg multiarg: --multiarg
             default_value("flag-unset") default_value_if("flag", None, "flag-set")
             "multiarg")
            (@arg multiarg2: --multiarg2
             default_value("flag-unset") default_value_if("flag", None, "flag-set",)
             "multiarg2")
    );

    let matches = app()
        .get_matches_from_safe(vec!["bin_name"])
        .expect("match failed");
    assert_eq!(matches.value_of("multiarg"), Some("flag-unset"));
    assert_eq!(matches.value_of("multiarg2"), Some("flag-unset"));

    let matches = app()
        .get_matches_from_safe(vec!["bin_name", "--flag"])
        .expect("match failed");
    assert_eq!(matches.value_of("multiarg"), Some("flag-set"));
    assert_eq!(matches.value_of("multiarg2"), Some("flag-set"));
}

#[test]
fn arg_enum() {
    // Helper macros to avoid repetition
    macro_rules! test_greek {
        ($arg_enum:item, $tests:block) => {{
            $arg_enum
            // FromStr implementation
            assert!("Charlie".parse::<Greek>().is_err());
            // Display implementation
            assert_eq!(format!("{}", Greek::Alpha), "Alpha");
            assert_eq!(format!("{}", Greek::Bravo), "Bravo");
            // fn variants()
            assert_eq!(Greek::variants(), ["Alpha", "Bravo"]);
            // rest of tests
            $tests
        }};
    }
    macro_rules! test_greek_no_meta {
        {$arg_enum:item} => {
            test_greek!($arg_enum, {
                // FromStr implementation
                assert!("Alpha".parse::<Greek>().is_ok());
                assert!("Bravo".parse::<Greek>().is_ok());
            })
        };
    }
    macro_rules! test_greek_meta {
        {$arg_enum:item} => {
            test_greek!($arg_enum, {
                // FromStr implementation
                assert_eq!("Alpha".parse::<Greek>(), Ok(Greek::Alpha));
                assert_eq!("Bravo".parse::<Greek>(), Ok(Greek::Bravo));
            })
        };
    }

    // Tests for each pattern
    // meta  NO, pub  NO, trailing comma  NO
    test_greek_no_meta!{
        arg_enum!{
            enum Greek {
                Alpha,
                Bravo
            }
        }
    };
    // meta  NO, pub  NO, trailing comma YES
    test_greek_no_meta!{
        arg_enum!{
            enum Greek {
                Alpha,
                Bravo,
            }
        }
    };
    // meta  NO, pub YES, trailing comma  NO
    test_greek_no_meta!{
        arg_enum!{
            pub enum Greek {
                Alpha,
                Bravo
            }
        }
    };
    // meta  NO, pub YES, trailing comma YES
    test_greek_no_meta!{
        arg_enum!{
            pub enum Greek {
                Alpha,
                Bravo,
            }
        }
    };
    // meta YES, pub  NO, trailing comma  NO
    test_greek_meta!{
        arg_enum!{
            #[derive(Debug, PartialEq, Copy, Clone)]
            enum Greek {
                Alpha,
                Bravo
            }
        }
    };
    // meta YES, pub  NO, trailing comma YES
    test_greek_meta!{
        arg_enum!{
            #[derive(Debug, PartialEq, Copy, Clone)]
            enum Greek {
                Alpha,
                Bravo,
            }
        }
    };
    // meta YES, pub YES, trailing comma  NO
    test_greek_meta!{
        arg_enum!{
            #[derive(Debug, PartialEq, Copy, Clone)]
            pub enum Greek {
                Alpha,
                Bravo
            }
        }
    };
    // meta YES, pub YES, trailing comma YES
    test_greek_meta!{
        arg_enum!{
            #[derive(Debug, PartialEq, Copy, Clone)]
            pub enum Greek {
                Alpha,
                Bravo,
            }
        }
    };
}