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use rlua::prelude::*;
use mime_guess;

pub fn init(lua: &Lua) -> crate::Result<()> {
    let module = lua.create_table()?;
    module.set("get_mime_type", lua.create_function(|_, ext: String| {
        Ok(mime_guess::get_mime_type(&ext).to_string())
    })?)?;

    module.set("guess_mime_type", lua.create_function(|_, path: String| {
        Ok(mime_guess::guess_mime_type(&path).to_string())
    })?)?;

    lua.globals().set("mime", module)?;

    Ok(())
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn lua_mime_get_type () {
        let lua = Lua::new();
        init(&lua).unwrap();

        lua.exec::<_, ()>(r#"
            local mime = mime.get_mime_type("gif")
            assert(mime == "image/gif")
        "#, None).unwrap();
    }

    #[test]
    fn lua_mime_guess_type () {
        let lua = Lua::new();
        init(&lua).unwrap();

        lua.exec::<_, ()>(r#"
            local mime = mime.guess_mime_type("file.txt")
            assert(mime == "text/plain")
        "#, None).unwrap();
    }
}