use crate::error::SiteError;
use crate::page::PageMeta;
use crate::site::Site;
use crate::wikitext::ParsedDirective;
use log::trace;
use std::path::Path;

#[derive(Debug, Eq, PartialEq)]
pub struct Img {
    src: String,
}

impl Img {
    pub const REQUIRED: &'static [&'static str] = &[];
    pub const ALLOWED: &'static [&'static str] = &["alt", "class", "link"];
    pub const ALLOW_ANY_UNNAMED: bool = true;

    pub fn new(src: String) -> Self {
        Self { src }
    }

    pub fn process(&self, site: &Site, meta: &mut PageMeta) -> Result<String, SiteError> {
        trace!("verify image exists: {}", self.src);
        let src = site.resolve(meta.path(), Path::new(&self.src))?;
        trace!("img src={:?}", src.display());
        Ok(format!("![]({})", self.src))
    }
}

impl From<ParsedDirective> for Img {
    fn from(p: ParsedDirective) -> Self {
        let unnamed = p.unnamed_args().pop().unwrap();
        Img::new(unnamed.into())
    }
}