use automerge::{transaction::Transactable, Automerge, AutomergeError, Value, ROOT};
use std::fs;
use std::time::Instant;

fn main() -> Result<(), AutomergeError> {
    let contents = fs::read_to_string("edits.json").expect("cannot read edits file");
    let edits = json::parse(&contents).expect("cant parse edits");
    let mut commands = vec![];
    for i in 0..edits.len() {
        let pos: usize = edits[i][0].as_usize().unwrap();
        let del: usize = edits[i][1].as_usize().unwrap();
        let mut vals = vec![];
        for j in 2..edits[i].len() {
            let v = edits[i][j].as_str().unwrap();
            vals.push(Value::str(v));
        }
        commands.push((pos, del, vals));
    }
    let mut doc = Automerge::new();

    let now = Instant::now();
    let mut tx = doc.transaction();
    let text = tx.set(&ROOT, "text", Value::text()).unwrap().unwrap();
    for (i, (pos, del, vals)) in commands.into_iter().enumerate() {
        if i % 1000 == 0 {
            println!("Processed {} edits in {} ms", i, now.elapsed().as_millis());
        }
        tx.splice(&text, pos, del, vals)?;
    }
    tx.commit();
    let _ = doc.save();
    println!("Done in {} ms", now.elapsed().as_millis());
    Ok(())
}