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#[derive(Clone, Copy, PartialEq, Eq, Debug)]
pub enum ReferrerPolicy {
    Default,
    NoReferrer,
    NoReferrerWhenDowngrade,
    SameOrigin,
    Origin,
    StrictOrigin,
    OriginWhenCrossOrigin,
    StrictOriginWhenCrossOrigin,
    UnsafeUrl,
}

impl ReferrerPolicy {
    pub(crate) fn from_str(policy: &str) -> Self {
        match policy {
            "no-referrer" => ReferrerPolicy::NoReferrer,
            "no-referrer-when-downgrade" => ReferrerPolicy::NoReferrerWhenDowngrade,
            "same-origin" => ReferrerPolicy::SameOrigin,
            "origin" => ReferrerPolicy::Origin,
            "strict-origin" => ReferrerPolicy::StrictOrigin,
            "origin-when-cross-origin" => ReferrerPolicy::OriginWhenCrossOrigin,
            "strict-origin-when-cross-origin" => ReferrerPolicy::StrictOriginWhenCrossOrigin,
            "unsafe-url" => ReferrerPolicy::UnsafeUrl,
            _ => ReferrerPolicy::Default,
        }
    }
}

impl Default for ReferrerPolicy {
    fn default() -> Self {
        ReferrerPolicy::Default
    }
}

impl AsRef<str> for ReferrerPolicy {
    fn as_ref(&self) -> &str {
        match self {
            ReferrerPolicy::Default => "",
            ReferrerPolicy::NoReferrer => "no-referrer",
            ReferrerPolicy::NoReferrerWhenDowngrade => "no-referrer-when-downgrade",
            ReferrerPolicy::SameOrigin => "same-origin",
            ReferrerPolicy::Origin => "origin",
            ReferrerPolicy::StrictOrigin => "strict-origin",
            ReferrerPolicy::OriginWhenCrossOrigin => "origin-when-cross-origin",
            ReferrerPolicy::StrictOriginWhenCrossOrigin => "strict-origin-when-cross-origin",
            ReferrerPolicy::UnsafeUrl => "unsafe-url",
        }
    }
}