use anyhow::Context;
use rfc6570_level_2::UriTemplate;

macro_rules! test_cases {
    ($(
        $case:ident: (
            $template:literal,
            $expressions:tt,
            $variables:tt,
            $var_map:tt,
            $uri:literal
        )
    ),+) => {$(
        #[test]
        fn $case() -> anyhow::Result<()> {
            let template = UriTemplate::new($template).context(concat!("failed to create TemplateUri from `", $template, "`"))?;
            assert_eq!(template.uri(), $template);

            let expressions: Vec<&str> = template.expressions().collect();
            assert_eq!(expressions, vec!$expressions);

            let variables: Vec<&str> = template.variables().collect();
            assert_eq!(variables, vec!$variables);

            let var_map = $var_map.iter().cloned().collect();
            let uri = template.expand(&var_map);
            assert_eq!(uri, $uri);

            Ok(())
        }
    )+};
}

test_cases! {
    case_example: (
        "https://example.com/{resource}/{+id}{#field}",
        ["{resource}", "{+id}", "{#field}"],
        ["resource", "id", "field"],
        [("resource", "user"), ("id", "5"), ("field", "email")],
        "https://example.com/user/5#email"
    ),
    case_username: (
        "http://example.com/~{username}/",
        ["{username}"],
        ["username"],
        [("username", "fred")],
        "http://example.com/~fred/"
    ),
    case_var: (
        "{var}",
        ["{var}"],
        ["var"],
        [("var", "value"), ("hello", "Hello World!")],
        "value"
    ),
    case_hello: (
        "{hello}",
        ["{hello}"],
        ["hello"],
        [("var", "value"), ("hello", "Hello World!")],
        "Hello%20World%21"
    ),
    case_plus_var: (
        "{+var}",
        ["{+var}"],
        ["var"],
        [("var", "value"), ("hello", "Hello World!"), ("path", "/foo/bar")],
        "value"
    ),
    case_plus_hello: (
        "{+hello}",
        ["{+hello}"],
        ["hello"],
        [("var", "value"), ("hello", "Hello World!"), ("path", "/foo/bar")],
        "Hello%20World!"
    ),
    case_plus_path_begin: (
        "{+path}/here",
        ["{+path}"],
        ["path"],
        [("var", "value"), ("hello", "Hello World!"), ("path", "/foo/bar")],
        "/foo/bar/here"
    ),
    case_plus_path_end: (
        "here?ref={+path}",
        ["{+path}"],
        ["path"],
        [("var", "value"), ("hello", "Hello World!"), ("path", "/foo/bar")],
        "here?ref=/foo/bar"
    ),
    case_hash_var: (
        "X{#var}",
        ["{#var}"],
        ["var"],
        [("var", "value"), ("hello", "Hello World!"), ("path", "/foo/bar")],
        "X#value"
    ),
    case_hash_hello: (
        "X{#hello}",
        ["{#hello}"],
        ["hello"],
        [("var", "value"), ("hello", "Hello World!"), ("path", "/foo/bar")],
        "X#Hello%20World!"
    ),
    case_var_semi: (
        "{var}",
        ["{var}"],
        ["var"],
        [("var", "value"), ("semi", ";")],
        "value"
    ),
    case_semi: (
        "{semi}",
        ["{semi}"],
        ["semi"],
        [("var", "value"), ("semi", ";")],
        "%3B"
    ),
    case_var_complex: (
        "{var}",
        ["{var}"],
        ["var"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "value"
    ),
    case_hello_complex: (
        "{hello}",
        ["{hello}"],
        ["hello"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "Hello%20World%21"
    ),
    case_half: (
        "{half}",
        ["{half}"],
        ["half"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "50%25"
    ),
    case_empty: (
        "O{empty}X",
        ["{empty}"],
        ["empty"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "OX"
    ),
    case_undef: (
        "O{undef}X",
        ["{undef}"],
        ["undef"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "OX"
    ),
    case_plus_var_complex: (
        "{+var}",
        ["{+var}"],
        ["var"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "value"
    ),
    case_plus_hello_complex: (
        "{+hello}",
        ["{+hello}"],
        ["hello"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "Hello%20World!"
    ),
    case_plus_half: (
        "{+half}",
        ["{+half}"],
        ["half"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "50%25"
    ),
    case_base: (
        "{base}index",
        ["{base}"],
        ["base"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "https%3A%2F%2Fexample.com%2Fhome%2Findex"
    ),
    case_plus_base: (
        "{+base}index",
        ["{+base}"],
        ["base"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "https://example.com/home/index"
    ),
    case_plus_empty: (
        "O{+empty}X",
        ["{+empty}"],
        ["empty"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "OX"
    ),
    case_plus_undef: (
        "O{+undef}X",
        ["{+undef}"],
        ["undef"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "OX"
    ),
    case_plus_path_begin_complex: (
        "{+path}/here",
        ["{+path}"],
        ["path"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "/foo/bar/here"
    ),
    case_plus_path_end_complex: (
        "here?ref={+path}",
        ["{+path}"],
        ["path"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "here?ref=/foo/bar"
    ),
    case_plus_path_var: (
        "up{+path}{var}/here",
        ["{+path}", "{var}"],
        ["path", "var"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "up/foo/barvalue/here"
    ),
    case_hash_var_complex: (
        "{#var}",
        ["{#var}"],
        ["var"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "#value"
    ),
    case_hash_hello_complex: (
        "{#hello}",
        ["{#hello}"],
        ["hello"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "#Hello%20World!"
    ),
    case_hash_half: (
        "{#half}",
        ["{#half}"],
        ["half"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "#50%25"
    ),
    case_hash_empty: (
        "foo{#empty}",
        ["{#empty}"],
        ["empty"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "foo#"
    ),
    case_hash_undef: (
        "foo{#undef}",
        ["{#undef}"],
        ["undef"],
        [
            ("dub", "me/too"), ("hello", "Hello World!"), ("half", "50%"), ("var", "value"), ("who", "fred"),
            ("base", "https://example.com/home/"), ("path", "/foo/bar"), ("v", "6"), ("x", "1024"), ("y", "768"),
            ("empty", "")
        ],
        "foo"
    )
}