mod config;
mod nex;
mod response;
mod snac;

use anyhow::Result;
use nex::Nex;
use response::Response;
use snac::Snac;

fn main() -> Result<()> {
    use clap::Parser;
    use config::Config;

    let c = Config::parse();
    let n = Nex::init(
        c.target,
        c.format_filename,
        c.format_updated,
        c.format_content,
        c.attachment,
        !c.keep,
        &c.user,
    )?;
    let s = Snac::init(c.source, c.user)?;

    println!("export begin...");
    let mut r = sync(&s, &n)?;
    match c.rotate {
        Some(t) => loop {
            println!(
                "queue completed:\n\tcreated: {}\n\tupdated: {}\n\tdeleted:\n\t\tfiles: {}\n\t\tdirectories: {}\n\tignored: {}\n\ttotal: {}\nawait {t} seconds to rotate...",
                r.created, r.updated, r.deleted.files, r.deleted.directories, r.ignored, r.total
            );
            std::thread::sleep(std::time::Duration::from_secs(t));
            r = sync(&s, &n)?;
        },
        None => println!(
            "export completed:\n\tcreated: {}\n\tupdated: {}\n\tdeleted:\n\t\tfiles: {}\n\t\tdirectories: {}\n\tignored: {}\n\ttotal: {}",
            r.created, r.updated, r.deleted.files, r.deleted.directories, r.ignored, r.total
        ),
    }

    Ok(())
}

fn sync(snac: &Snac, nex: &Nex) -> Result<Response> {
    use std::collections::HashSet;
    let mut r = Response::default();
    for user in &snac.users {
        println!("\tsync profile for `{}`...", user.name);
        let mut keep = if nex.is_cleanup() {
            Some(HashSet::with_capacity(100)) // @TODO estimated
        } else {
            None
        };
        for post in user.public()? {
            r.total += 1;
            // make sure post entry has expected content type
            if !post.is_note() {
                todo!()
            }
            // skip non authorized content
            if let Some(content) = post.source_content {
                println!("\t\tsync post `{}`...", post.id);
                let response = nex.sync(
                    &user.name,
                    content,
                    post.url,
                    post.attachment.map(|a| {
                        use nex::source::Source;
                        let mut attachments = Vec::with_capacity(a.len());
                        for attachment in a {
                            attachments.push((
                                attachment.name,
                                attachment.media_type,
                                if nex.is_attachments_disabled() {
                                    Source::Url(attachment.url)
                                } else {
                                    Source::File(
                                        user.file(attachment.url.split('/').next_back().unwrap())
                                            .unwrap(),
                                    )
                                },
                            ))
                        }
                        attachments
                    }),
                    post.tag.map(|t| {
                        let mut tags = Vec::with_capacity(t.len());
                        for tag in t {
                            tags.push(tag.name)
                        }
                        tags
                    }),
                    (post.published, post.updated),
                )?;
                use nex::response::change::Change;
                match response.change {
                    Change::Created => {
                        r.created += 1;
                        println!("\t\t\tcreate new post file.")
                    }
                    Change::Ignored => {
                        r.ignored += 1;
                        println!("\t\t\tpost file is up to date.")
                    }
                    Change::Updated => {
                        r.updated += 1;
                        println!("\t\t\tpost file update with new content.")
                    }
                }
                if let Some(ref mut k) = keep
                    && let Some(r) = response.keep
                {
                    for i in r {
                        k.insert(i);
                    }
                }
            }
        }
        // cleanup removed post entries
        if let Some(k) = keep {
            let d = nex.clean(&user.name, k)?;
            r.deleted.directories += d.directories;
            r.deleted.files += d.files;
        }
    }
    Ok(r)
}