<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2016 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
namespace Fisharebest\Webtrees\Controller;

use Fisharebest\Webtrees\Filter;
use Fisharebest\Webtrees\I18N;
use Fisharebest\Webtrees\Theme;

/**
 * Controller for the fan chart
 */
class FanchartController extends ChartController {
	/** @var int Style of fanchart */
	public $fan_style;

	/** @var int Width of fanchart (a percentage)  */
	public $fan_width;

	/** @var int Number of generations to display */
	public $generations;

	/**
	 * Create the controller
	 */
	public function __construct() {
		global $WT_TREE;

		parent::__construct();

		$default_generations = $WT_TREE->getPreference('DEFAULT_PEDIGREE_GENERATIONS');

		// Extract the request parameters
		$this->fan_style   = Filter::getInteger('fan_style', 2, 4, 3);
		$this->fan_width   = Filter::getInteger('fan_width', 50, 500, 100);
		$this->generations = Filter::getInteger('generations', 2, 9, $default_generations);

		if ($this->root && $this->root->canShowName()) {
			$this->setPageTitle(
				/* I18N: http://en.wikipedia.org/wiki/Family_tree#Fan_chart - %s is an individual’s name */
				I18N::translate('Fan chart of %s', $this->root->getFullName())
			);
		} else {
			$this->setPageTitle(I18N::translate('Fan chart'));
		}
	}

	/**
	 * A list of options for the chart style.
	 *
	 * @return string[]
	 */
	public function getFanStyles() {
		return [
			2 => /* I18N: layout option for the fan chart */ I18N::translate('half circle'),
			3 => /* I18N: layout option for the fan chart */ I18N::translate('three-quarter circle'),
			4 => /* I18N: layout option for the fan chart */ I18N::translate('full circle'),
		];
	}

	/**
	 * split and center text by lines
	 *
	 * @param string $data input string
	 * @param int    $maxlen max length of each line
	 *
	 * @return string $text output string
	 */
	public function splitAlignText($data, $maxlen) {
		$RTLOrd = [215, 216, 217, 218, 219];

		$lines = explode("\n", $data);
		// more than 1 line : recursive calls
		if (count($lines) > 1) {
			$text = '';
			foreach ($lines as $line) {
				$text .= $this->splitAlignText($line, $maxlen) . "\n";
			}

			return $text;
		}
		// process current line word by word
		$split = explode(' ', $data);
		$text  = '';
		$line  = '';

		// do not split hebrew line
		$found = false;
		foreach ($RTLOrd as $ord) {
			if (strpos($data, chr($ord)) !== false) {
				$found = true;
			}
		}
		if ($found) {
			$line = $data;
		} else {
			foreach ($split as $word) {
				$len  = strlen($line);
				$wlen = strlen($word);
				if (($len + $wlen) < $maxlen) {
					if (!empty($line)) {
						$line .= ' ';
					}
					$line .= "$word";
				} else {
					$p = max(0, (int) (($maxlen - $len) / 2));
					if (!empty($line)) {
						$line = str_repeat(' ', $p) . $line; // center alignment using spaces
						$text .= $line . "\n";
					}
					$line = $word;
				}
			}
		}
		// last line
		if (!empty($line)) {
			$len = strlen($line);
			if (in_array(ord($line{0}), $RTLOrd)) {
				$len /= 2;
			}
			$p    = max(0, (int) (($maxlen - $len) / 2));
			$line = str_repeat(' ', $p) . $line; // center alignment using spaces
			$text .= $line;
		}

		return $text;
	}

	/**
	 * Generate both the HTML and PNG components of the fan chart
	 *
	 * The HTML and PNG components both require the same co-ordinate calculations,
	 * so we generate them using the same code, but we send them in separate
	 * HTTP requests.
	 *
	 * @param string $what "png" or "html"
	 *
	 * @return string
	 */
	public function generateFanChart($what) {
		$treeid = $this->sosaAncestors($this->generations);
		$fanw   = 640 * $this->fan_width / 100;
		$fandeg = 90 * $this->fan_style;
		$html   = '';

		$treesize = count($treeid) + 1;

		// generations count
		$gen  = log($treesize) / log(2) - 1;
		$sosa = $treesize - 1;

		// fan size
		if ($fandeg == 0) {
			$fandeg = 360;
		}
		$fandeg = min($fandeg, 360);
		$fandeg = max($fandeg, 90);
		$cx     = $fanw / 2 - 1; // center x
		$cy     = $cx; // center y
		$rx     = $fanw - 1;
		$rw     = $fanw / ($gen + 1);
		$fanh   = $fanw; // fan height
		if ($fandeg == 180) {
			$fanh = round($fanh * ($gen + 1) / ($gen * 2));
		}
		if ($fandeg == 270) {
			$fanh = round($fanh * 0.86);
		}
		$scale = $fanw / 640;

		// image init
		$image = imagecreate($fanw, $fanh);
		$white = imagecolorallocate($image, 0xFF, 0xFF, 0xFF);
		imagefilledrectangle($image, 0, 0, $fanw, $fanh, $white);
		imagecolortransparent($image, $white);

		$color = imagecolorallocate(
			$image,
			hexdec(substr(Theme::theme()->parameter('chart-font-color'), 0, 2)),
			hexdec(substr(Theme::theme()->parameter('chart-font-color'), 2, 2)),
			hexdec(substr(Theme::theme()->parameter('chart-font-color'), 4, 2)));
		$bgcolor = imagecolorallocate(
			$image,
			hexdec(substr(Theme::theme()->parameter('chart-background-u'), 0, 2)),
			hexdec(substr(Theme::theme()->parameter('chart-background-u'), 2, 2)),
			hexdec(substr(Theme::theme()->parameter('chart-background-u'), 4, 2))
		);
		$bgcolorM = imagecolorallocate(
			$image,
			hexdec(substr(Theme::theme()->parameter('chart-background-m'), 0, 2)),
			hexdec(substr(Theme::theme()->parameter('chart-background-m'), 2, 2)),
			hexdec(substr(Theme::theme()->parameter('chart-background-m'), 4, 2))
		);
		$bgcolorF = imagecolorallocate(
			$image,
			hexdec(substr(Theme::theme()->parameter('chart-background-f'), 0, 2)),
			hexdec(substr(Theme::theme()->parameter('chart-background-f'), 2, 2)),
			hexdec(substr(Theme::theme()->parameter('chart-background-f'), 4, 2))
		);

		// imagemap
		$imagemap = '<map id="fanmap" name="fanmap">';

		// loop to create fan cells
		while ($gen >= 0) {
			// clean current generation area
			$deg2 = 360 + ($fandeg - 180) / 2;
			$deg1 = $deg2 - $fandeg;
			imagefilledarc($image, $cx, $cy, $rx, $rx, $deg1, $deg2, $bgcolor, IMG_ARC_PIE);
			$rx -= 3;

			// calculate new angle
			$p2    = pow(2, $gen);
			$angle = $fandeg / $p2;
			$deg2  = 360 + ($fandeg - 180) / 2;
			$deg1  = $deg2 - $angle;
			// special case for rootid cell
			if ($gen == 0) {
				$deg1 = 90;
				$deg2 = 360 + $deg1;
			}

			// draw each cell
			while ($sosa >= $p2) {
				$person = $treeid[$sosa];
				if ($person) {
					$name    = $person->getFullName();
					$addname = $person->getAddName();

					$text = I18N::reverseText($name);
					if ($addname) {
						$text .= "\n" . I18N::reverseText($addname);
					}

					$text .= "\n" . I18N::reverseText($person->getLifeSpan());

					switch ($person->getSex()) {
					case 'M':
						$bg = $bgcolorM;
						break;
					case 'F':
						$bg = $bgcolorF;
						break;
					default:
						$bg = $bgcolor;
						break;
					}

					imagefilledarc($image, $cx, $cy, $rx, $rx, $deg1, $deg2, $bg, IMG_ARC_PIE);

					// split and center text by lines
					$wmax = (int) ($angle * 7 / Theme::theme()->parameter('chart-font-size') * $scale);
					$wmax = min($wmax, 35 * $scale);
					if ($gen == 0) {
						$wmax = min($wmax, 17 * $scale);
					}
					$text = $this->splitAlignText($text, $wmax);

					// text angle
					$tangle = 270 - ($deg1 + $angle / 2);
					if ($gen == 0) {
						$tangle = 0;
					}

					// calculate text position
					$deg = $deg1 + 0.44;
					if ($deg2 - $deg1 > 40) {
						$deg = $deg1 + ($deg2 - $deg1) / 11;
					}
					if ($deg2 - $deg1 > 80) {
						$deg = $deg1 + ($deg2 - $deg1) / 7;
					}
					if ($deg2 - $deg1 > 140) {
						$deg = $deg1 + ($deg2 - $deg1) / 4;
					}
					if ($gen == 0) {
						$deg = 180;
					}
					$rad = deg2rad($deg);
					$mr  = ($rx - $rw / 4) / 2;
					if ($gen > 0 && $deg2 - $deg1 > 80) {
						$mr = $rx / 2;
					}
					$tx = $cx + $mr * cos($rad);
					$ty = $cy - $mr * -sin($rad);
					if ($sosa == 1) {
						$ty -= $mr / 2;
					}

					// print text
					imagettftext(
						$image,
						Theme::theme()->parameter('chart-font-size'),
						$tangle, $tx, $ty,
						$color, Theme::theme()->parameter('chart-font-name'),
						$text
					);

					$imagemap .= '<area shape="poly" coords="';
					// plot upper points
					$mr  = $rx / 2;
					$deg = $deg1;
					while ($deg <= $deg2) {
						$rad = deg2rad($deg);
						$tx  = round($cx + $mr * cos($rad));
						$ty  = round($cy - $mr * -sin($rad));
						$imagemap .= "$tx,$ty,";
						$deg += ($deg2 - $deg1) / 6;
					}
					// plot lower points
					$mr  = ($rx - $rw) / 2;
					$deg = $deg2;
					while ($deg >= $deg1) {
						$rad = deg2rad($deg);
						$tx  = round($cx + $mr * cos($rad));
						$ty  = round($cy - $mr * -sin($rad));
						$imagemap .= "$tx,$ty,";
						$deg -= ($deg2 - $deg1) / 6;
					}
					// join first point
					$mr  = $rx / 2;
					$deg = $deg1;
					$rad = deg2rad($deg);
					$tx  = round($cx + $mr * cos($rad));
					$ty  = round($cy - $mr * -sin($rad));
					$imagemap .= "$tx,$ty";
					// add action url
					$pid = $person->getXref();
					$imagemap .= '" href="#' . $pid . '"';
					$html .= '<div id="' . $pid . '" class="fan_chart_menu">';
					$html .= '<div class="person_box"><div class="details1">';
					$html .= '<a href="' . $person->getHtmlUrl() . '" class="name1">' . $name;
					if ($addname) {
						$html .= $addname;
					}
					$html .= '</a>';
					$html .= '<ul class="charts">';
					foreach (Theme::theme()->individualBoxMenu($person) as $menu) {
						$html .= $menu->getMenuAsList();
					}
					$html .= '</ul>';
					$html .= '</div></div>';
					$html .= '</div>';
					$imagemap .= ' alt="' . strip_tags($person->getFullName()) . '" title="' . strip_tags($person->getFullName()) . '">';
				}
				$deg1 -= $angle;
				$deg2 -= $angle;
				$sosa--;
			}
			$rx -= $rw;
			$gen--;
		}

		$imagemap .= '</map>';

		switch ($what) {
		case 'html':
			return $html . $imagemap . '<div id="fan_chart_img"><img src="' . WT_SCRIPT_NAME . '?rootid=' . $this->root->getXref() . '&amp;fan_style=' . $this->fan_style . '&amp;generations=' . $this->generations . '&amp;fan_width=' . $this->fan_width . '&amp;img=1" width="' . $fanw . '" height="' . $fanh . '" alt="' . strip_tags($this->getPageTitle()) . '" usemap="#fanmap"></div>';

		case 'png':
			imagestringup($image, 1, $fanw - 10, $fanh / 3, WT_BASE_URL, $color);
			ob_start();
			imagepng($image);
			imagedestroy($image);

			return ob_get_clean();

		default:
			throw new \InvalidArgumentException(__METHOD__ . ' ' . $what);
		}
	}
}
