use node_semver::{Range as SemVerRange, Version as SemVerVersion};
use oro_package_spec::{PackageSpec, PackageSpecError, VersionSpec};

type Result<T> = std::result::Result<T, PackageSpecError>;

fn parse(input: &str) -> Result<PackageSpec> {
    input.parse()
}

fn range(input: &str) -> Option<VersionSpec> {
    Some(VersionSpec::Range(SemVerRange::parse(input).unwrap()))
}

#[test]
fn npm_pkg_basic() -> Result<()> {
    let res = parse("hello-world")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: None,
            name: "hello-world".into(),
            requested: None
        }
    );
    Ok(())
}

#[test]
fn npm_pkg_tag() -> Result<()> {
    let res = parse("hello-world@latest")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: None,
            name: "hello-world".into(),
            requested: Some(VersionSpec::Tag("latest".into()))
        }
    );
    Ok(())
}

#[test]
fn alias_npm_pkg_basic() -> Result<()> {
    let res = parse("foo@npm:hello-world")?;
    assert_eq!(
        res,
        PackageSpec::Alias {
            name: "foo".into(),
            spec: Box::new(PackageSpec::Npm {
                scope: None,
                name: "hello-world".into(),
                requested: None
            })
        }
    );
    Ok(())
}

#[test]
fn alias_not_recursive() -> Result<()> {
    let res = parse("foo@bar@npm:hello-world");
    assert!(res.is_err());
    Ok(())
}

#[test]
fn npm_pkg_prefixed() -> Result<()> {
    let res = parse("npm:hello-world")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: None,
            name: "hello-world".into(),
            requested: None
        }
    );
    Ok(())
}

#[test]
fn npm_pkg_scoped() -> Result<()> {
    let res = parse("@hello/world")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: Some("hello".into()),
            name: "@hello/world".into(),
            requested: None
        }
    );
    Ok(())
}

#[test]
fn npm_pkg_with_req() -> Result<()> {
    let res = parse("hello-world@1.2.3")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: None,
            name: "hello-world".into(),
            requested: Some(VersionSpec::Version(SemVerVersion::parse("1.2.3").unwrap()))
        }
    );
    Ok(())
}

#[test]
fn npm_pkg_with_tag() -> Result<()> {
    let res = parse("hello-world@howdy")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: None,
            name: "hello-world".into(),
            requested: Some(VersionSpec::Tag("howdy".into())),
        }
    );
    Ok(())
}

#[test]
fn npm_pkg_scoped_with_req() -> Result<()> {
    let res = parse("@hello/world@1.2.3")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: Some("hello".into()),
            name: "@hello/world".into(),
            requested: Some(VersionSpec::Version(SemVerVersion::parse("1.2.3").unwrap()))
        }
    );
    Ok(())
}

#[test]
fn npm_pkg_prefixed_with_req() -> Result<()> {
    let res = parse("npm:@hello/world@1.2.3")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: Some("hello".into()),
            name: "@hello/world".into(),
            requested: Some(VersionSpec::Version(SemVerVersion::parse("1.2.3").unwrap()))
        }
    );
    Ok(())
}

#[test]
fn odd_npm_example_with_prerelease() -> Result<()> {
    let res = parse("world@>1.1.0-beta-10")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: None,
            name: "world".into(),
            requested: range(">1.1.0-beta-10"),
        }
    );
    Ok(())
}

#[test]
fn approximately_equivalent_version() -> Result<()> {
    let res = parse("world@~1.1.0")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: None,
            name: "world".into(),
            requested: range("~1.1.0"),
        }
    );
    Ok(())
}

#[test]
fn compatible_equivalent_version() -> Result<()> {
    let res = parse("world@^1.1.0")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: None,
            name: "world".into(),
            requested: range("^1.1.0"),
        }
    );
    Ok(())
}

#[test]
fn x_version() -> Result<()> {
    let res = parse("world@1.1.x")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: None,
            name: "world".into(),
            requested: range("1.1.x"),
        }
    );
    Ok(())
}

#[test]
fn hyphen_version_range() -> Result<()> {
    let res = parse("world@1.5.0 - 2.1.0")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: None,
            name: "world".into(),
            requested: range("1.5.0 - 2.1.0"),
        }
    );
    Ok(())
}

#[test]
fn alternate_version_ranges() -> Result<()> {
    let res = parse("world@1.5.0 - 2.1.0 || 2.3.x")?;
    assert_eq!(
        res,
        PackageSpec::Npm {
            scope: None,
            name: "world".into(),
            requested: range("1.5.0 - 2.1.0 || 2.3.x"),
        }
    );
    Ok(())
}

#[test]
fn npm_pkg_bad_tag() -> Result<()> {
    let res = parse("hello-world@%&W$@#$");
    assert!(res.is_err());
    Ok(())
}