package utils

import (
	"bufio"
	"log"
	"os"
	"strconv"
	"strings"
)

func ReadLines(fileName string) []string {
	result := []string{}
	file, err := os.Open(fileName)
	if err != nil {
		log.Fatal(err)
	}
	defer file.Close()

	scanner := bufio.NewScanner(file)
	for scanner.Scan() {
		result = append(result, scanner.Text())
	}

	if err := scanner.Err(); err != nil {
		log.Fatal(err)
	}

	return result
}

func ParseIntArray(s string, sep string) []int {
	result := []int{}

	var vals []string
	if sep == " " {
		vals = strings.Fields(strings.TrimSpace(s))
	} else {
		vals = strings.Split(strings.TrimSpace(s), sep)
	}

	for _, val := range vals {
		n, _ := strconv.Atoi(val)
		result = append(result, n)
	}

	return result
}

func ParseInt64Array(s string, sep string) []int64 {
	result := []int64{}

	var vals []string
	if sep == " " {
		vals = strings.Fields(strings.TrimSpace(s))
	} else {
		vals = strings.Split(strings.TrimSpace(s), sep)
	}

	for _, val := range vals {
		n, _ := strconv.ParseInt(val, 10, 64)
		result = append(result, n)
	}

	return result
}

func IntPow(x int, y int) int {
	result := 1

	for i := 0; i < y; i++ {
		result *= x
	}

	return result
}

func Int64Pow(x int64, y int64) int64 {
	result := int64(1)

	for i := int64(0); i < y; i++ {
		result *= x
	}

	return result
}