adventofcode/2016/day17-add/main.go

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2016-12-18 15:32:37 +00:00
package main
import (
"crypto/md5"
"fmt"
"os"
termbox "github.com/nsf/termbox-go"
"../../"
)
var gridWidth, gridHeight int
var path string
func main() {
// TODO: Random seed
passcode := "pvhmgsws"
gridWidth, gridHeight = 4, 4
if len(os.Args) >= 3 {
gridWidth = aoc.Atoi(os.Args[1])
gridHeight = aoc.Atoi(os.Args[2])
}
run := true
err := termbox.Init()
if err != nil {
panic(err)
}
defer termbox.Close()
var e termbox.Event
for run {
PrintState("", passcode)
e = termbox.PollEvent()
if e.Type == termbox.EventKey {
if e.Key == termbox.KeyCtrlC {
run = false
}
}
}
}
// We cache the last hash calculated
// It should speed things up a little
var lastHashInput string
var lastHash string
func doorIsOpen(path, passcode string, dir rune) bool {
if lastHashInput != passcode+path {
lastHashInput = passcode + path
lastHash = fmt.Sprintf("%x", md5.Sum([]byte(lastHashInput)))
}
switch dir {
case 'N':
return lastHash[0] >= 'b' && lastHash[0] <= 'f'
case 'E':
return lastHash[3] >= 'b' && lastHash[3] <= 'f'
case 'S':
return lastHash[1] >= 'b' && lastHash[1] <= 'f'
case 'W':
return lastHash[2] >= 'b' && lastHash[2] <= 'f'
}
return false
}
func currPos(path string) (int, int) {
var cX, cY int
for i := range path {
switch path[i] {
case 'U':
cY--
case 'D':
cY++
case 'L':
cX--
case 'R':
cX++
}
}
return cX, cY
}
func PrintState(path, passcode string) {
posX, posY := currPos(path)
for y := 0; y < gridHeight; y++ {
for x := 0; x < gridWidth; x++ {
fmt.Print(aoc.BorderNW)
if posX == x && posY == y && doorIsOpen(path, passcode, 'N') {
// Current Pos w/ open door
fmt.Print(aoc.BorderSE)
fmt.Print(aoc.BorderSW)
} else if y == posY+1 && x == posX && doorIsOpen(path, passcode, 'S') {
// Room below, w/ open door
fmt.Print(aoc.BorderNE)
fmt.Print(aoc.BorderNW)
} else {
// All other cases
fmt.Print(aoc.BorderWE)
fmt.Print(aoc.BorderWE)
}
fmt.Print(aoc.BorderNE)
}
fmt.Println()
for x := 0; x < gridWidth; x++ {
if posX == x && posY == y && doorIsOpen(path, passcode, 'W') {
fmt.Print(aoc.BorderSE)
} else {
fmt.Print(aoc.BorderNS)
}
if posX == x && posY == y {
fmt.Print(aoc.BorderNW)
fmt.Print(aoc.BorderNE)
} else {
fmt.Print(" ")
fmt.Print(" ")
}
if posX == x && posY == y && doorIsOpen(path, passcode, 'E') {
fmt.Print(aoc.BorderSW)
} else {
fmt.Print(aoc.BorderNS)
}
}
fmt.Println()
for x := 0; x < gridWidth; x++ {
if posX == x && posY == y && doorIsOpen(path, passcode, 'W') {
fmt.Print(aoc.BorderNE)
} else {
fmt.Print(aoc.BorderNS)
}
if posX == x && posY == y {
fmt.Print(aoc.BorderSW)
fmt.Print(aoc.BorderSE)
} else {
fmt.Print(" ")
fmt.Print(" ")
}
if posX == x && posY == y && doorIsOpen(path, passcode, 'E') {
fmt.Print(aoc.BorderNW)
} else {
fmt.Print(aoc.BorderNS)
}
}
fmt.Println()
for x := 0; x < gridWidth; x++ {
fmt.Print(aoc.BorderSW)
if posX == x && posY == y && doorIsOpen(path, passcode, 'S') {
fmt.Print(aoc.BorderNE)
fmt.Print(aoc.BorderNW)
} else {
fmt.Print(aoc.BorderWE)
fmt.Print(aoc.BorderWE)
}
fmt.Print(aoc.BorderSE)
}
fmt.Println()
}
}
func ClearScreen() {
fmt.Print(aoc.ClearScreen)
}
func printUsageAndExit() {
fmt.Println("Usage: ./day17 <passcode> <gridWidth> <gridHeight>")
os.Exit(0)
}