package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"time"
)

func main() {
	start := time.Now()
	partOne()
	duration := time.Since(start)
	partTwo()
	duration2 := time.Since(start)
	fmt.Printf("p1: %s, p2: %s\n", duration, duration2-duration)
}

func makeScanner(test bool) *bufio.Scanner {
	var f *os.File
	if test {
		f, _ = os.Open("inputs/testinput")
	} else {
		f, _ = os.Open("inputs/input")
	}
	reader := bufio.NewReader(f)
	return bufio.NewScanner(reader)
}

func partOne() {
	scanner := makeScanner(false)

	p := 0
	c := 0
	for scanner.Scan() {
		line := scanner.Text()
		n, _ := strconv.Atoi(line)
		if p != 0 && n > p {
			c++
		}
		p = n
	}
	fmt.Println("part 1:", c)
}

func partTwo() {
	scanner := makeScanner(false)

	one, two, three := 0, 0, 0
	c := 0
	for scanner.Scan() {
		line := scanner.Text()
		n, _ := strconv.Atoi(line)
		if one != 0 && two != 0 && three != 0 && one+two+three < two+three+n {
			c++
		}
		one, two, three = two, three, n
	}
	fmt.Println("part 2:", c)
}