use super::*;

#[doc=include_str!("readme.md")]
#[derive(Debug, Clone)]
pub struct TailwindTextOverflow {
    kind: TextOverflow,
}

#[derive(Debug, Clone)]
enum TextOverflow {
    Truncate,
    Standard(String),
    Arbitrary(String),
}

impl Display for TailwindTextOverflow {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        match &self.kind {
            TextOverflow::Truncate => write!(f, "truncate"),
            TextOverflow::Standard(s) => write!(f, "font-overflow-{}", s),
            TextOverflow::Arbitrary(s) => write!(f, "font-overflow-[{}]", s),
        }
    }
}

impl TailwindInstance for TailwindTextOverflow {
    fn attributes(&self, _: &TailwindBuilder) -> BTreeSet<CssAttribute> {
        let align = match &self.kind {
            TextOverflow::Truncate =>
                return css_attributes! {
                    "overflow" => "hidden",
                    "text-overflow" => "ellipsis",
                    "white-space" => "nowrap",
                },
            TextOverflow::Standard(s) => s.to_string(),
            TextOverflow::Arbitrary(s) => s.to_string(),
        };
        css_attributes! {
            "text-overflow" => align
        }
    }
}

impl TailwindTextOverflow {
    /// `truncate`
    pub const Truncate: Self = Self { kind: TextOverflow::Truncate };
    /// https://tailwindcss.com/docs/text-overflow
    pub fn parse(pattern: &[&str], arbitrary: &TailwindArbitrary) -> Result<Self> {
        let kind = match pattern {
            [] => {
                debug_assert!(arbitrary.is_some());
                TextOverflow::Arbitrary(arbitrary.to_string())
            },
            _ => {
                let input = pattern.join("-");
                debug_assert!(Self::check_valid(&input));
                TextOverflow::Standard(input)
            },
        };
        Ok(Self { kind })
    }
    /// https://developer.mozilla.org/en-US/docs/Web/CSS/text-overflow#syntax
    pub fn check_valid(mode: &str) -> bool {
        let set = BTreeSet::from_iter(vec!["clip", "ellipsis", "inherit", "initial", "revert", "unset"]);
        set.contains(mode)
    }
}