<?php

namespace Mpdf;

use Mpdf\Color\ColorConverter;
use Mpdf\Css\TextVars;

class DirectWrite
{

	/**
	 * @var \Mpdf\Mpdf
	 */
	private $mpdf;

	/**
	 * @var \Mpdf\Otl
	 */
	private $otl;

	/**
	 * @var \Mpdf\SizeConverter
	 */
	private $sizeConverter;

	/**
	 * @var \Mpdf\Color\ColorConverter
	 */
	private $colorConverter;

	public function __construct(Mpdf $mpdf, Otl $otl, SizeConverter $sizeConverter, ColorConverter $colorConverter)
	{
		$this->mpdf = $mpdf;
		$this->otl = $otl;
		$this->sizeConverter = $sizeConverter;
		$this->colorConverter = $colorConverter;
	}

	function Write($h, $txt, $currentx = 0, $link = '', $directionality = 'ltr', $align = '', $fill = 0)
	{
		if (!$align) {
			if ($directionality === 'rtl') {
				$align = 'R';
			} else {
				$align = 'L';
			}
		}
		if ($h == 0) {
			$this->mpdf->SetLineHeight();
			$h = $this->mpdf->lineheight;
		}
		//Output text in flowing mode
		$w = $this->mpdf->w - $this->mpdf->rMargin - $this->mpdf->x;

		$wmax = ($w - ($this->mpdf->cMarginL + $this->mpdf->cMarginR));
		$s = str_replace("\r", '', $txt);
		if ($this->mpdf->usingCoreFont) {
			$nb = strlen($s);
		} else {
			$nb = mb_strlen($s, $this->mpdf->mb_enc);
			// handle single space character
			if (($nb === 1) && $s === ' ') {
				$this->mpdf->x += $this->mpdf->GetStringWidth($s);
				return;
			}
		}
		$sep = -1;
		$i = 0;
		$j = 0;
		$l = 0;
		$nl = 1;
		if (!$this->mpdf->usingCoreFont) {
			if (preg_match('/([' . $this->mpdf->pregRTLchars . '])/u', $txt)) {
				$this->mpdf->biDirectional = true;
			} // *RTL*
			while ($i < $nb) {
				//Get next character
				$c = mb_substr($s, $i, 1, $this->mpdf->mb_enc);
				if ($c === "\n") {
					// WORD SPACING
					$this->mpdf->ResetSpacing();
					//Explicit line break
					$tmp = rtrim(mb_substr($s, $j, $i - $j, $this->mpdf->mb_enc));
					$this->mpdf->Cell($w, $h, $tmp, 0, 2, $align, $fill, $link);
					$i++;
					$sep = -1;
					$j = $i;
					$l = 0;
					if ($nl === 1) {
						if ($currentx != 0) {
							$this->mpdf->x = $currentx;
						} else {
							$this->mpdf->x = $this->mpdf->lMargin;
						}
						$w = $this->mpdf->w - $this->mpdf->rMargin - $this->mpdf->x;
						$wmax = ($w - ($this->mpdf->cMarginL + $this->mpdf->cMarginR));
					}
					$nl++;
					continue;
				}
				if ($c === ' ') {
					$sep = $i;
				}
				$l += $this->mpdf->GetCharWidthNonCore($c); // mPDF 5.3.04
				if ($l > $wmax) {
					//Automatic line break (word wrapping)
					if ($sep == -1) {
						// WORD SPACING
						$this->mpdf->ResetSpacing();
						if ($this->mpdf->x > $this->mpdf->lMargin) {
							//Move to next line
							if ($currentx != 0) {
								$this->mpdf->x = $currentx;
							} else {
								$this->mpdf->x = $this->mpdf->lMargin;
							}
							$this->mpdf->y+=$h;
							$w = $this->mpdf->w - $this->mpdf->rMargin - $this->mpdf->x;
							$wmax = ($w - ($this->mpdf->cMarginL + $this->mpdf->cMarginR));
							$i++;
							$nl++;
							continue;
						}
						if ($i == $j) {
							$i++;
						}
						$tmp = rtrim(mb_substr($s, $j, $i - $j, $this->mpdf->mb_enc));
						$this->mpdf->Cell($w, $h, $tmp, 0, 2, $align, $fill, $link);
					} else {
						$tmp = rtrim(mb_substr($s, $j, $sep - $j, $this->mpdf->mb_enc));

						if ($align === 'J') {
							//////////////////////////////////////////
							// JUSTIFY J using Unicode fonts (Word spacing doesn't work)
							// WORD SPACING
							// Change NON_BREAKING SPACE to spaces so they are 'spaced' properly
							$tmp = str_replace(chr(194) . chr(160), chr(32), $tmp);
							$len_ligne = $this->mpdf->GetStringWidth($tmp);
							$nb_carac = mb_strlen($tmp, $this->mpdf->mb_enc);
							$nb_spaces = mb_substr_count($tmp, ' ', $this->mpdf->mb_enc);
							$inclCursive = false;
							if (!empty($this->mpdf->CurrentFont['useOTL']) && preg_match('/([' . $this->mpdf->pregCURSchars . '])/u', $tmp)) {
								$inclCursive = true;
							}
							list($charspacing, $ws) = $this->mpdf->GetJspacing($nb_carac, $nb_spaces, (($w - 2) - $len_ligne) * Mpdf::SCALE, $inclCursive);
							$this->mpdf->SetSpacing($charspacing, $ws);
							//////////////////////////////////////////
						}
						$this->mpdf->Cell($w, $h, $tmp, 0, 2, $align, $fill, $link);
						$i = $sep + 1;
					}
					$sep = -1;
					$j = $i;
					$l = 0;
					if ($nl === 1) {
						if ($currentx != 0) {
							$this->mpdf->x = $currentx;
						} else {
							$this->mpdf->x = $this->mpdf->lMargin;
						}
						$w = $this->mpdf->w - $this->mpdf->rMargin - $this->mpdf->x;
						$wmax = ($w - ($this->mpdf->cMarginL + $this->mpdf->cMarginR));
					}
					$nl++;
				} else {
					$i++;
				}
			}
			//Last chunk
			// WORD SPACING
			$this->mpdf->ResetSpacing();
		} else {
			while ($i < $nb) {
				//Get next character
				$c = $s[$i];
				if ($c === "\n") {
					//Explicit line break
					// WORD SPACING
					$this->mpdf->ResetSpacing();
					$this->mpdf->Cell($w, $h, substr($s, $j, $i - $j), 0, 2, $align, $fill, $link);
					$i++;
					$sep = -1;
					$j = $i;
					$l = 0;
					if ($nl === 1) {
						if ($currentx != 0) {
							$this->mpdf->x = $currentx;
						} else {
							$this->mpdf->x = $this->mpdf->lMargin;
						}
						$w = $this->mpdf->w - $this->mpdf->rMargin - $this->mpdf->x;
						$wmax = $w - ($this->mpdf->cMarginL + $this->mpdf->cMarginR);
					}
					$nl++;
					continue;
				}
				if ($c === ' ') {
					$sep = $i;
				}
				$l += $this->mpdf->GetCharWidthCore($c); // mPDF 5.3.04
				if ($l > $wmax) {
					//Automatic line break (word wrapping)
					if ($sep == -1) {
						// WORD SPACING
						$this->mpdf->ResetSpacing();
						if ($this->mpdf->x > $this->mpdf->lMargin) {
							//Move to next line
							if ($currentx != 0) {
								$this->mpdf->x = $currentx;
							} else {
								$this->mpdf->x = $this->mpdf->lMargin;
							}
							$this->mpdf->y+=$h;
							$w = $this->mpdf->w - $this->mpdf->rMargin - $this->mpdf->x;
							$wmax = $w - ($this->mpdf->cMarginL + $this->mpdf->cMarginR);
							$i++;
							$nl++;
							continue;
						}
						if ($i == $j) {
							$i++;
						}
						$this->mpdf->Cell($w, $h, substr($s, $j, $i - $j), 0, 2, $align, $fill, $link);
					} else {
						$tmp = substr($s, $j, $sep - $j);
						if ($align === 'J') {
							//////////////////////////////////////////
							// JUSTIFY J using Unicode fonts
							// WORD SPACING is not fully supported for complex scripts
							// Change NON_BREAKING SPACE to spaces so they are 'spaced' properly
							$tmp = str_replace(chr(160), chr(32), $tmp);
							$len_ligne = $this->mpdf->GetStringWidth($tmp);
							$nb_carac = strlen($tmp);
							$nb_spaces = substr_count($tmp, ' ');
							list($charspacing, $ws) = $this->mpdf->GetJspacing($nb_carac, $nb_spaces, (($w - 2) - $len_ligne) * Mpdf::SCALE, $false);
							$this->mpdf->SetSpacing($charspacing, $ws);
							//////////////////////////////////////////
						}
						$this->mpdf->Cell($w, $h, $tmp, 0, 2, $align, $fill, $link);
						$i = $sep + 1;
					}
					$sep = -1;
					$j = $i;
					$l = 0;
					if ($nl === 1) {
						if ($currentx != 0) {
							$this->mpdf->x = $currentx;
						} else {
							$this->mpdf->x = $this->mpdf->lMargin;
						}
						$w = $this->mpdf->w - $this->mpdf->rMargin - $this->mpdf->x;
						$wmax = $w - ($this->mpdf->cMarginL + $this->mpdf->cMarginR);
					}
					$nl++;
				} else {
					$i++;
				}
			}
			// WORD SPACING
			$this->mpdf->ResetSpacing();
		}
		//Last chunk
		if ($i != $j) {
			if ($currentx != 0) {
				$this->mpdf->x = $currentx;
			} else {
				$this->mpdf->x = $this->mpdf->lMargin;
			}
			if ($this->mpdf->usingCoreFont) {
				$tmp = substr($s, $j, $i - $j);
			} else {
				$tmp = mb_substr($s, $j, $i - $j, $this->mpdf->mb_enc);
			}
			$this->mpdf->Cell($w, $h, $tmp, 0, 0, $align, $fill, $link);
		}
	}

	function CircularText($x, $y, $r, $text, $align = 'top', $fontfamily = '', $fontsizePt = 0, $fontstyle = '', $kerning = 120, $fontwidth = 100, $divider = '')
	{
		if ($fontfamily || $fontstyle || $fontsizePt) {
			$this->mpdf->SetFont($fontfamily, $fontstyle, $fontsizePt);
		}

		$kerning /= 100;
		$fontwidth /= 100;

		if ($kerning == 0) {
			throw new \Mpdf\MpdfException('Please use values unequal to zero for kerning (CircularText)');
		}

		if ($fontwidth == 0) {
			throw new \Mpdf\MpdfException('Please use values unequal to zero for font width (CircularText)');
		}

		$text = str_replace("\r", '', $text);

		// circumference
		$u = ($r * 2) * M_PI;
		$checking = true;
		$autoset = false;

		while ($checking) {
			$t = 0;
			$w = [];
			if ($this->mpdf->usingCoreFont) {
				$nb = strlen($text);
				for ($i = 0; $i < $nb; $i++) {
					$w[$i] = $this->mpdf->GetStringWidth($text[$i]);
					$w[$i]*=$kerning * $fontwidth;
					$t+=$w[$i];
				}
			} else {
				$nb = mb_strlen($text, $this->mpdf->mb_enc);
				$lastchar = '';
				$unicode = $this->mpdf->UTF8StringToArray($text);
				for ($i = 0; $i < $nb; $i++) {
					$c = mb_substr($text, $i, 1, $this->mpdf->mb_enc);
					$w[$i] = $this->mpdf->GetStringWidth($c);
					$w[$i]*=$kerning * $fontwidth;
					$char = $unicode[$i];
					if ($this->mpdf->useKerning && $lastchar && isset($this->mpdf->CurrentFont['kerninfo'][$lastchar][$char])) {
						$tk = $this->mpdf->CurrentFont['kerninfo'][$lastchar][$char] * ($this->mpdf->FontSize / 1000) * $kerning * $fontwidth;
						$w[$i] += $tk / 2;
						$w[$i - 1] += $tk / 2;
						$t+=$tk;
					}
					$lastchar = $char;
					$t+=$w[$i];
				}
			}
			if ($fontsizePt >= 0 || $autoset) {
				$checking = false;
			} else {
				$t+=$this->mpdf->GetStringWidth('  ');
				if ($divider) {
					$t+=$this->mpdf->GetStringWidth('  ');
				}
				if ($fontsizePt == -2) {
					$fontsizePt = $this->mpdf->FontSizePt * 0.5 * $u / $t;
				} else {
					$fontsizePt = $this->mpdf->FontSizePt * $u / $t;
				}
				$this->mpdf->SetFontSize($fontsizePt);
				$autoset = true;
			}
		}

		// total width of string in degrees
		$d = ($t / $u) * 360;

		$this->mpdf->StartTransform();

		// rotate matrix for the first letter to center the text
		// (half of total degrees)
		if ($align === 'top') {
			$this->mpdf->transformRotate(-$d / 2, $x, $y);
		} else {
			$this->mpdf->transformRotate($d / 2, $x, $y);
		}

		// run through the string
		for ($i = 0; $i < $nb; $i++) {

			if ($align === 'top') {

				// rotate matrix half of the width of current letter + half of the width of preceding letter
				if ($i === 0) {
					$this->mpdf->transformRotate((($w[$i] / 2) / $u) * 360, $x, $y);
				} else {
					$this->mpdf->transformRotate((($w[$i] / 2 + $w[$i - 1] / 2) / $u) * 360, $x, $y);
				}

				if ($fontwidth !== 1) {
					$this->mpdf->StartTransform();
					$this->mpdf->transformScale($fontwidth * 100, 100, $x, $y);
				}

				$this->mpdf->SetXY($x - $w[$i] / 2, $y - $r);

			} else {

				// rotate matrix half of the width of current letter + half of the width of preceding letter
				if ($i === 0) {
					$this->mpdf->transformRotate(-(($w[$i] / 2) / $u) * 360, $x, $y);
				} else {
					$this->mpdf->transformRotate(-(($w[$i] / 2 + $w[$i - 1] / 2) / $u) * 360, $x, $y);
				}

				if ($fontwidth !== 1) {
					$this->mpdf->StartTransform();
					$this->mpdf->transformScale($fontwidth * 100, 100, $x, $y);
				}
				$this->mpdf->SetXY($x - $w[$i] / 2, $y + $r - $this->mpdf->FontSize);
			}

			if ($this->mpdf->usingCoreFont) {
				$c = $text[$i];
			} else {
				$c = mb_substr($text, $i, 1, $this->mpdf->mb_enc);
			}

			$this->mpdf->Cell($w[$i], $this->mpdf->FontSize, $c, 0, 0, 'C'); // mPDF 5.3.53

			if ($fontwidth !== 1) {
				$this->mpdf->StopTransform();
			}
		}

		$this->mpdf->StopTransform();

		// mPDF 5.5.23
		if ($align === 'top' && $divider != '') {
			$wc = $this->mpdf->GetStringWidth($divider);
			$wc *= $kerning * $fontwidth;

			$this->mpdf->StartTransform();
			$this->mpdf->transformRotate(90, $x, $y);
			$this->mpdf->SetXY($x - $wc / 2, $y - $r);
			$this->mpdf->Cell($wc, $this->mpdf->FontSize, $divider, 0, 0, 'C');
			$this->mpdf->StopTransform();

			$this->mpdf->StartTransform();
			$this->mpdf->transformRotate(-90, $x, $y);
			$this->mpdf->SetXY($x - $wc / 2, $y - $r);
			$this->mpdf->Cell($wc, $this->mpdf->FontSize, $divider, 0, 0, 'C');
			$this->mpdf->StopTransform();
		}
	}

	function Shaded_box($text, $font = '', $fontstyle = 'B', $szfont = '', $width = '70%', $style = 'DF', $radius = 2.5, $fill = '#FFFFFF', $color = '#000000', $pad = 2)
	{
		// F (shading - no line),S (line, no shading),DF (both)
		if (!$font) {
			$font = $this->mpdf->default_font;
		}
		if (!$szfont) {
			$szfont = $this->mpdf->default_font_size * 1.8;
		}

		$text = ' ' . $text . ' ';
		$this->mpdf->SetFont($font, $fontstyle, $szfont, false);

		$text = $this->mpdf->purify_utf8_text($text);

		if ($this->mpdf->text_input_as_HTML) {
			$text = $this->mpdf->all_entities_to_utf8($text);
		}

		if ($this->mpdf->usingCoreFont) {
			$text = mb_convert_encoding($text, $this->mpdf->mb_enc, 'UTF-8');
		}


		// DIRECTIONALITY
		if (preg_match('/([' . $this->mpdf->pregRTLchars . '])/u', $text)) {
			$this->mpdf->biDirectional = true;
		} // *RTL*

		$textvar = 0;
		$save_OTLtags = $this->mpdf->OTLtags;
		$this->mpdf->OTLtags = [];

		if ($this->mpdf->useKerning) {
			if ($this->mpdf->CurrentFont['haskernGPOS']) {
				$this->mpdf->OTLtags['Plus'] .= ' kern';
			} else {
				$textvar |= TextVars::FC_KERNING;
			}
		}
		// Use OTL OpenType Table Layout - GSUB & GPOS
		if (!empty($this->mpdf->CurrentFont['useOTL'])) {
			$text = $this->otl->applyOTL($text, $this->mpdf->CurrentFont['useOTL']);
			$OTLdata = $this->otl->OTLdata;
		}
		$this->mpdf->OTLtags = $save_OTLtags;

		$this->mpdf->magic_reverse_dir($text, $this->mpdf->directionality, $OTLdata);

		if (!$width) {
			$width = $this->mpdf->pgwidth;
		} else {
			$width = $this->sizeConverter->convert($width, $this->mpdf->pgwidth);
		}
		$midpt = $this->mpdf->lMargin + ($this->mpdf->pgwidth / 2);
		$r1 = $midpt - ($width / 2); //($this->mpdf->w / 2) - 40;
		$r2 = $r1 + $width;   //$r1 + 80;
		$y1 = $this->mpdf->y;

		$loop = 0;

		while ($loop === 0) {
			$this->mpdf->SetFont($font, $fontstyle, $szfont, false);
			$sz = $this->mpdf->GetStringWidth($text, true, $OTLdata, $textvar);
			if (($r1 + $sz) > $r2) {
				$szfont --;
			} else {
				$loop ++;
			}
		}
		$this->mpdf->SetFont($font, $fontstyle, $szfont, true, true);

		$y2 = $this->mpdf->FontSize + ($pad * 2);

		$this->mpdf->SetLineWidth(0.1);
		$fc = $this->colorConverter->convert($fill, $this->mpdf->PDFAXwarnings);
		$tc = $this->colorConverter->convert($color, $this->mpdf->PDFAXwarnings);
		$this->mpdf->SetFColor($fc);
		$this->mpdf->SetTColor($tc);
		$this->mpdf->RoundedRect($r1, $y1, $r2 - $r1, $y2, $radius, $style);
		$this->mpdf->SetX($r1);
		$this->mpdf->Cell($r2 - $r1, $y2, $text, 0, 1, 'C', 0, '', 0, 0, 0, 'M', 0, false, $OTLdata, $textvar);
		$this->mpdf->SetY($y1 + $y2 + 2); // +2 = mm margin below shaded box
		$this->mpdf->Reset();
	}
}