package main

import (
	"encoding/csv"
	"fmt"
	"io"
	"log"
	"os"
	"strconv"
)

func main() {

	blocks := load_blocks()
	fmt.Println("Total blocks:", len(blocks))

	// Parse parameters
	// Turn parameters into rows
	row1 := "769104803"
	// row2 := "154800060"
	// row3 := "002700150"
	// row4 := "600900308"
	// row5 := "045328670"
	// row6 := "328670945"
	// row7 := "597410280"
	// row8 := "006284090"
	// row9 := "200590006"

	// Find rows that fit with the entered rows
	rows1 := find_blocks(blocks, row1)
	// rows2 := find_blocks(blocks, row2)
	// rows3 := find_blocks(blocks, row3)
	// rows4 := find_blocks(blocks, row4)
	// rows5 := find_blocks(blocks, row5)
	// rows6 := find_blocks(blocks, row6)
	// rows7 := find_blocks(blocks, row7)
	// rows8 := find_blocks(blocks, row8)
	// rows9 := find_blocks(blocks, row9)

	fmt.Println("len(rows1):", len(rows1))
	// fmt.Println(rows1)

}

func find_blocks(blocks []int, row string) []int {
	// Declare selection
	var selection []int

	fmt.Println(row)
	for letter := range row {
		fmt.Println("Letter", row[letter])
		//curr_number := row[letter]
		for block := range blocks {
			// fmt.Println(blocks[block])
			curr_row := strconv.Itoa(blocks[block])
			fmt.Println(curr_row[0])
			//if curr_number ==
		}
	}

	// Return selection
	return selection
}

func load_blocks() []int {
	var blocks []int

	file, err := os.Open("blocks.csv")
	if err != nil {
		panic(err)
	}
	defer file.Close()

	r := csv.NewReader(file)
	for {
		record, err := r.Read()
		if err == io.EOF {
			break
		}
		if err != nil {
			log.Fatal(err)
		}

		block, _ := strconv.Atoi(record[0])
		blocks = append(blocks, block)
	}

	return blocks
}

func generate_blocks() []int {

	var blocks []int
	decvals := [9]int{49, 50, 51, 52, 53, 54, 55, 56, 57}

	for counter := 123456789; counter <= 987654321; counter++ {

		// Convert number to string ([]byte)
		digits := strconv.Itoa(counter)

		// Check if every number is only represented only once
		var valid bool
		valid = true
		for decval := range decvals {
			var count int
			for digit := range digits {
				if digits[digit] == byte(decvals[decval]) {
					count = count + 1
				}
			}

			if count != 1 {
				valid = false
			}
		}

		if valid {
			blocks = append(blocks, counter)
		}
	}

	return blocks

}

func print_block(block int) {
	digits := strconv.Itoa(block)
	fmt.Printf("%c %c %c\n%c %c %c\n%c %c %c\n\n", digits[0], digits[1], digits[2], digits[3], digits[4], digits[5], digits[6], digits[7], digits[8])
}