Day 3!

src/main.rs

@@ -1,11 +1,11 @@
 mod args;
 mod fuel;
 mod machine;
+mod wiremap;
 
 use crate::args::Command;
 use crate::fuel::calculate_fuel;
-use crate::machine::{Computer};
-use std::fs;
+use crate::wiremap::WireMap;
 
 fn main() {
     match Command::get() {
@@ -40,5 +40,35 @@ fn main() {
                 }
             }
         }
+
+        Command::WireMap(wires) => {
+            let mut wiremap = WireMap::new();
+
+            for (num, wire) in wires.iter().enumerate() {
+                wiremap.add_wire(wire, num);
+            }
+
+            let (target, distance) = wiremap.closest_intersection();
+            println!("Closest intersection: ({}, {}) [distance {}]",
+                     target.0, target.1, distance);
+
+            let mut best_total_steps = usize::max_value();
+
+            for (target_num, join_point) in wiremap.joins().iter().enumerate() {
+                let mut total_steps = 0;
+
+                for (num, wire) in wires.iter().enumerate() {
+                    let wire_steps = wiremap.steps_to(wire, *join_point);
+                    println!("Wire #{} takes {} steps to target #{}.", num, wire_steps, target_num);
+                    total_steps += wire_steps;
+                }
+
+                if total_steps < best_total_steps {
+                    best_total_steps = total_steps;
+                }
+            }
+
+            println!("Total steps taken: {}", best_total_steps);
+        }
     }
  }