use adenosine::app_bsky::{FeedPostView, PostView, ThreadPostView};
use anyhow::Result;
use std::io::Write;
use termcolor::{Color, ColorChoice, ColorSpec, StandardStream, WriteColor};

pub fn pp_thread_post_view(tpv: &ThreadPostView) -> Result<()> {
    // TODO: this could do better
    if let Some(parent) = &tpv.parent {
        pp_thread_post_view(parent)?;
    };
    if let Some(not_found) = &tpv.notFound {
        if *not_found {
            let mut stdout = StandardStream::stdout(ColorChoice::Always);
            stdout.set_color(ColorSpec::new().set_fg(Some(Color::Red)))?;
            writeln!(
                &mut stdout,
                "thread post not found: {}\n",
                tpv.uri.as_ref().expect("URI for post-not-found")
            )?;
            stdout.reset()?;
        }
    }
    if let Some(post) = &tpv.post {
        pp_post_view(post)?;
    }
    if let Some(replies) = &tpv.replies {
        for child in replies {
            pp_thread_post_view(child)?;
        }
    };
    Ok(())
}

pub fn pp_feed_post_view(fpv: &FeedPostView) -> Result<()> {
    let mut stdout = StandardStream::stdout(ColorChoice::Always);

    if let Some(repost) = &fpv.reason {
        stdout.set_color(ColorSpec::new().set_dimmed(true).set_italic(true))?;
        write!(&mut stdout, "re-posted by ")?;
        stdout.set_color(
            ColorSpec::new()
                .set_fg(Some(Color::Yellow))
                .set_dimmed(true)
                .set_italic(true),
        )?;
        writeln!(&mut stdout, "@{}", repost.by.handle)?;
        stdout.reset()?;
    }

    pp_post_view(&fpv.post)
}

pub fn pp_post_view(pv: &PostView) -> Result<()> {
    let mut stdout = StandardStream::stdout(ColorChoice::Always);

    if let Some(reply_to) = &pv.record.reply {
        stdout.set_color(ColorSpec::new().set_dimmed(true).set_italic(true))?;
        writeln!(&mut stdout, "reply to {}", reply_to.parent.uri)?;
        stdout.reset()?;
    }

    stdout.set_color(ColorSpec::new().set_fg(Some(Color::Yellow)).set_bold(true))?;
    write!(&mut stdout, "@{:<54.54}", pv.author.handle)?;
    stdout.reset()?;
    stdout.set_color(ColorSpec::new().set_dimmed(true))?;
    writeln!(&mut stdout, "{}", pv.indexedAt)?;
    stdout.reset()?;

    if let Some(entities) = &pv.record.entities {
        let mut cur: usize = 0;
        for ent in entities {
            write!(
                &mut stdout,
                "{}",
                &pv.record.text[cur..ent.index.start as usize]
            )?;
            match ent.r#type.as_str() {
                "mention" => stdout
                    .set_color(ColorSpec::new().set_fg(Some(Color::Magenta)).set_bold(true))?,
                "hashtag" => {
                    stdout.set_color(ColorSpec::new().set_fg(Some(Color::Cyan)).set_bold(true))?
                }
                "link" => stdout.set_color(
                    ColorSpec::new()
                        .set_fg(Some(Color::Blue))
                        .set_underline(true),
                )?,
                _ => {}
            }
            write!(
                &mut stdout,
                "{}",
                &pv.record.text[ent.index.start as usize..ent.index.end as usize]
            )?;
            stdout.reset()?;
            cur = ent.index.end as usize;
        }
        writeln!(&mut stdout, "{}", &pv.record.text[cur..])?;
    } else if !pv.record.text.is_empty() {
        writeln!(&mut stdout, "{}", &pv.record.text)?;
    }

    if let Some(embed) = &pv.embed {
        if let Some(ext) = &embed.external {
            let desc = format!("{}: {}", ext.title, ext.description);
            stdout.set_color(
                ColorSpec::new()
                    .set_fg(Some(Color::Green))
                    .set_dimmed(true)
                    .set_underline(false),
            )?;
            writeln!(&mut stdout, " {:<70.70}", desc)?;
            write!(&mut stdout, " ")?;
            stdout.set_color(
                ColorSpec::new()
                    .set_fg(Some(Color::Green))
                    .set_dimmed(true)
                    .set_underline(true),
            )?;
            writeln!(&mut stdout, "{}", &ext.uri)?;
            stdout.reset()?;
        }
        if let Some(images) = &embed.images {
            for img in images.iter() {
                if !img.alt.is_empty() {
                    stdout.set_color(
                        ColorSpec::new()
                            .set_fg(Some(Color::Green))
                            .set_dimmed(true)
                            .set_underline(false),
                    )?;
                    writeln!(&mut stdout, " {:<70.70}", img.alt)?;
                }
                write!(&mut stdout, " ")?;
                stdout.set_color(
                    ColorSpec::new()
                        .set_fg(Some(Color::Green))
                        .set_dimmed(true)
                        .set_underline(true),
                )?;
                writeln!(&mut stdout, "{}", &img.fullsize)?;
                stdout.reset()?;
            }
        }
    }

    stdout.set_color(ColorSpec::new().set_dimmed(true))?;
    writeln!(&mut stdout, "{}\n", pv.uri)?;

    stdout.reset()?;
    Ok(())
}