package main

import (
	"fmt"
	"io"
	"os"

	"git.kleiax.de/homepage/libs/sudoku"
)

func main() {
	solver := sudoku.Solver{}
	solver.Add(&sudoku.LastDigit{})
	solver.Add(&sudoku.NakedSingle{})
	game, err := sudoku.New(&sudoku.PuzzleBank{}, solver, openFile())
	if err != nil {
		fmt.Println(err.Error())
		os.Exit(1)
	}

	field := game.GetField()
	fmt.Println(field.String())

	err = game.Solve()
	if err != nil {
		fmt.Println(err.Error())
	}

	field = game.GetField()
	fmt.Println(field.String())
}

func openFile() []byte {
	file, err := os.Open("libs/sudoku/data/sudoku-exchange-puzzle-bank/easy3.txt")
	if err != nil {
		fmt.Println("Kann datei nicht öffnen")
		os.Exit(3)
	}
	defer file.Close()

	content, err := io.ReadAll(file)
	if err != nil {
		fmt.Println("Kann Daten nicht extrahieren")
		os.Exit(4)
	}

	return content
}