package main

import (
  "bufio"
  "fmt"
  "os"
  "strings"
)

func main() {
  fmt.Println("Advent of Code 2015 Day 1")
  data, err := read_string_input("input.txt")
  if err != nil {
    fmt.Println (err)
  }

  floor, basement := solve(data)
  fmt.Printf("Part One: %d\n", floor)
  fmt.Printf("Part Two: %d\n", basement)
}

func read_string_input(path string) ([]string, error) {
  file, err := os.Open(path)
  if err != nil {
    return nil, err
  }
  defer file.Close()

  var lines []string
  scanner := bufio.NewScanner(file)
  for scanner.Scan() {
    lines = append(lines, scanner.Text())
  }

  return lines, scanner.Err()
}

func solve(puzzle []string) (int, int) {
  s := strings.Split(puzzle[0], "")
  var floor int = 0
  var basement int = 0
  for i, c := range s {
    if c == "(" {
      floor = floor + 1
    } else {
      floor = floor - 1
    }
    if floor == -1 {
      if basement == 0 {
        basement = i + 1 // since you start out in position 1
      } 
    }
  }
  return floor, basement
}