// Copyright (C) 2016 Mikael Berthe <mikael@lilotux.net>. All rights reserved.

// Use of this source code is governed by the MIT license,

// which can be found in the LICENSE file.

package main

import (

	"fmt"

	"github.com/jung-kurt/gofpdf"

	"github.com/pkg/errors"

)

func tak2pdf(takuzu *takuzu.Takuzu, pdfFileName string) error {

	if pdfFileName == "" {

		return errors.New("no PDF file name")

	}

	size := takuzu.Size

	pdf := gofpdf.New("P", "mm", "A4", "")

	pdf.SetFont("Arial", "", 14)

	basicTable := func() {

		for ln, l := range takuzu.Board {

			for cn, cell := range l {

				border := "" // empty, "1", "L", "T", "R" and "B"

				if ln == 0 {

					border += "T"

				}

				if cn == 0 {

					border += "L"

				}

				if ln+1 == size {

					border += "B"

				}

				if cn+1 == size {

					border += "R"

				}

				align := "CM" // horiz=Center vert=Middle

				if cell.Defined {

					pdf.CellFormat(8, 8, fmt.Sprint(cell.Value), border, 0, align, false, 0, "")

				} else {

					pdf.CellFormat(8, 8, ".", border, 0, align, false, 0, "")

				}

			}

			pdf.Ln(-1)

		}

	}

	pdf.AddPage()

	basicTable()

	if err := pdf.OutputFileAndClose(pdfFileName); err != nil {

		return err

	}

	return nil

}