package day04

import (
	"fmt"
	"regexp"
	"strconv"
	"tools"
)

var roomRegexp = regexp.MustCompile(`^(.*)-([[:digit:]]+)\[(.*)\]$`)

func validateChecksum(roomname, checksum string) bool {
	charcount := make(map[int32]int)
	for _, c := range roomname {
		if c != '-' {
			charcount[c]++
		}
	}
	for i, c := range checksum {
		if i == 0 {
			continue
		}
		if c < int32(checksum[i-1]) || charcount[c] > charcount[int32(checksum[i-1])] {
			return false
		}
	}
	return true
}

func Part1(puzzle tools.AoCPuzzle) interface{} {
	for _, line := range puzzle.GetInputArray() {
		roomMatches := roomRegexp.FindStringSubmatch(line)
		roomName := roomMatches[1]
		roomSectorId, _ := strconv.Atoi(roomMatches[2])
		roomChecksum := roomMatches[3]
		fmt.Println("Name:", roomName, "SectorID:", roomSectorId, "CheckSum:", roomChecksum)
		if !validateChecksum(roomName, roomChecksum) {
			fmt.Println("MEEP!")
		}
	}
	return 0
}

func Part2(puzzle tools.AoCPuzzle) interface{} {
	return 0
}