use serde::Serialize;

use super::render_context::RenderContext;
use crate::error::CustomError;
use crate::intermediate::ISrcBlock;
use crate::intermediate::ISrcSegment;

use super::macros::render;

#[derive(Debug, Serialize)]
#[serde(tag = "type")]
#[serde(rename = "src_block")]
pub(crate) struct RenderSrcBlock {
    lines: Vec<RenderSrcLine>,
    language: Option<String>,
    post_blank: organic::types::PostBlank,
}

#[derive(Debug, Serialize)]
pub(crate) struct RenderSrcLine {
    children: Vec<RenderSrcSegment>,
}

#[derive(Debug, Serialize)]
#[serde(tag = "type")]
pub(crate) enum RenderSrcSegment {
    #[serde(rename = "raw_text")]
    RawText { content: String },

    #[serde(rename = "highlight_start")]
    HighlightStart { name: String },

    #[serde(rename = "highlight_end")]
    HighlightEnd,
}

render!(RenderSrcBlock, ISrcBlock, original, _render_context, {
    let lines = original
        .lines
        .iter()
        .map(|original_line| {
            let children = original_line
                .children
                .iter()
                .map(|original_segment| match original_segment {
                    ISrcSegment::RawText(body) => RenderSrcSegment::RawText {
                        content: body.to_owned(),
                    },
                    ISrcSegment::HighlightStart { name } => RenderSrcSegment::HighlightStart {
                        name: css_safe_name(name),
                    },
                    ISrcSegment::HighlightEnd => RenderSrcSegment::HighlightEnd,
                })
                .collect();
            RenderSrcLine { children }
        })
        .collect();
    Ok(RenderSrcBlock {
        lines,
        language: original.language.clone(),
        post_blank: original.post_blank,
    })
});

fn css_safe_name<S>(inp: S) -> String
where
    std::string::String: From<S>,
{
    let inp: String = inp.into();
    inp.replace(".", "_")
}