use std::{char, fs, vec};

pub fn day3() {
    let mut ret = 0;
    for i in extract() {
        ret += i.0 * i.1;
    }
    println!("{}", ret);
}

fn extract() -> Vec<(i32, i32)> {
    let text = fs::read_to_string("input").unwrap();
    let mut ret: Vec<(i32, i32)> = vec::Vec::new();
    let text_vec = text.chars().collect::<Vec<char>>();
    let mut in_mul = false;
    let mut lhs = true;
    let mut collector: (Vec<char>, Vec<char>) = (Vec::new(), Vec::new());
    for (i, v) in text.chars().enumerate() {
        println!("---START({},{})---", i, v);
        if i < 3 {
            //Jump to line 3 as loop peeks backwards
            continue;
        }
        if v == '(' && text_vec[i - 1] == 'l' && text_vec[i - 2] == 'u' && text_vec[i - 3] == 'm' {
            // If the code is here, the last 3 chars spell 'mul'
            println!("Last 4 spelled mul(");
            in_mul = true;
            continue;
        } else if in_mul {
            // You are inside of a mul(... block
            // volcel police have been alerted to your position
            if lhs && v.is_numeric() {
                println!("pushed left: {}", v);
                collector.0.push(v);
                continue;
            } else if !lhs && v.is_numeric() {
                println!("pushed right: {}", v);
                collector.1.push(v);
                continue;
            } else if v == ',' {
                println!("comma");
                lhs = false; // Swap to the right because you are on the other side of the comma
            } else if v == ')' && in_mul {
                println!("pushing... {}", in_mul);
                lhs = true;
                in_mul = false;

                // Collect chars into ints and then add to vec
                ret.push((
                    (collector
                        .0
                        .iter()
                        .cloned()
                        .collect::<String>()
                        .parse::<i32>()
                        .unwrap()),
                    (collector
                        .1
                        .iter()
                        .cloned()
                        .collect::<String>()
                        .parse::<i32>()
                        .unwrap()),
                ));
                collector.1.clear();
                collector.0.clear();
                println!("current final vec: {:?}", ret);
            } else {
                println!("cleared");
                collector.1.clear();
                collector.0.clear();
                lhs = true;
                in_mul = false;
            }
        } else {
        }

        println!("---END({},{})---", i, v);
    }
    return ret;
}