<?php

namespace ChurchCRM\Reports;

require_once __DIR__ . '/../Include/Config.php';
require_once __DIR__ . '/../Include/Functions.php';

use ChurchCRM\dto\SystemConfig;
use ChurchCRM\model\ChurchCRM\GroupQuery;
use ChurchCRM\model\ChurchCRM\ListOptionQuery;
use ChurchCRM\model\ChurchCRM\Map\PersonTableMap;
use ChurchCRM\model\ChurchCRM\Person2group2roleP2g2rQuery;
use ChurchCRM\Utils\InputUtils;
use ChurchCRM\Utils\LoggerUtils;

$iGroupID = InputUtils::legacyFilterInput($_GET['GroupID']);
$aGrp = explode(',', $iGroupID);

$iFYID = (int) InputUtils::legacyFilterInput($_GET['FYID'], 'int');

class PdfPhotoBook extends ChurchInfoReport
{
    private $group;
    private string $FYIDString;
    private ?int $currentX = null;
    private ?int $currentY = null;
    private int $pageMarginL = 15;
    private int $pageMarginR = 15;
    private int $pageMarginT = 20;
    private int $pageMarginB = 5;
    private float $personMarginL = 2.5;
    private float $personMarginR = 2.5;
    private int $personImageHeight = 30;
    private int $personImageWidth = 30;

    // Constructor
    public function __construct($iFYID)
    {
        parent::__construct('P', 'mm', $this->paperFormat);
        $this->FYIDString = MakeFYString($iFYID);
    }

    public function drawGroup($iGroupID): void
    {
        $this->group = GroupQuery::create()->findOneById($iGroupID);
        
        // Skip if group not found
        if ($this->group === null) {
            LoggerUtils::getAppLogger()->warning("PhotoBook: Group with ID $iGroupID not found");
            return;
        }
        
        // Use our own margin logic.
        $this->SetMargins(0, 0);
        $this->SetFont('Times', '', 14);
        $this->SetAutoPageBreak(false);
        $this->addPage();
        $this->drawGroupMebersByRole('Teacher', gettext('Teachers'));
        $this->addPage();
        $this->drawGroupMebersByRole('Student', gettext('Students'));
    }

    private function drawPageHeader(string $title): void
    {
        $this->currentX = $this->pageMarginL;
        $this->currentY = $this->pageMarginT;

        $this->SetFont('Times', 'B', 16);
        $this->writeAt($this->currentX, $this->currentY, $title);
        $this->currentX = 170;
        $this->writeAt($this->currentX, $this->currentY, $this->FYIDString);
        $this->SetLineWidth(0.5);
        $this->Line($this->pageMarginL, 25.25, $this->GetPageWidth() - $this->pageMarginR, 25.25);
    }

    private function drawPersonBlock($name, $photoURI): void
    {
        // Draw a bounding box around the image placeholder centered around the name text.
        $this->currentX += $this->personMarginL;
        $this->SetFont('Times', '', 10);
        $NameWidth = $this->GetStringWidth($name);
        $offset = ($NameWidth / 2) - ($this->personImageWidth / 2) + 2;

        $this->SetLineWidth(0.25);
        $this->Rect($this->currentX, $this->currentY, $this->personImageWidth, $this->personImageHeight);

        // Draw the image or an x
        if (file_exists($photoURI)) {
            $this->Image($photoURI, $this->currentX + .25, $this->currentY + .25, $this->personImageWidth - .5, $this->personImageHeight - .5, 'PNG');
        } else {
            $this->Line($this->currentX, $this->currentY, $this->currentX + $this->personImageWidth, $this->currentY + $this->personImageHeight);
            $this->Line($this->currentX + $this->personImageWidth, $this->currentY, $this->currentX, $this->currentY + $this->personImageHeight);
        }

        // Move the cursor, and draw the teacher name
        $this->currentX -= $offset;
        $this->currentY += $this->personImageHeight + 2;
        $this->writeAt($this->currentX, $this->currentY, $name);

        $this->currentX += $offset;
        $this->currentY -= $this->personImageHeight + 2;

        $this->currentX += $this->personImageWidth;
        $this->currentX += $this->personMarginR;
    }

    private function drawGroupMebersByRole(string $roleName, string $roleDisplayName): void
    {
        // Safety check - should not happen after drawGroup check, but be defensive
        if ($this->group === null) {
            LoggerUtils::getAppLogger()->error("PhotoBook: Cannot draw group members - group is null");
            return;
        }
        
        $RoleListID = $this->group->getRoleListId();
        $groupRole = ListOptionQuery::create()->filterById($RoleListID)->filterByOptionName($roleName)->findOne();
        
        // Skip if role not found for this group
        if ($groupRole === null) {
            LoggerUtils::getAppLogger()->warning("PhotoBook: Role '$roleName' not found for group " . $this->group->getName());
            return;
        }
        
        $groupRoleMemberships = Person2group2roleP2g2rQuery::create()
                            ->filterByGroup($this->group)
                            ->filterByRoleId($groupRole->getOptionId())
                            ->joinWithPerson()
                            ->orderBy(PersonTableMap::COL_PER_LASTNAME)
                            ->_and()->orderBy(PersonTableMap::COL_PER_FIRSTNAME)
                            ->find();
        $this->drawPageHeader(gettext('PhotoBook') . ' - ' . $this->group->getName() . ' - ' . $roleDisplayName . ' (' . $groupRoleMemberships->count() . ')');
        $this->currentX = $this->pageMarginL;
        $this->currentY += 10;
        foreach ($groupRoleMemberships as $roleMembership) {
            $person = $roleMembership->getPerson();
            $this->drawPersonBlock($person->getFullName(), $person->getPhoto()->getPhotoURI());
            if ($this->currentX + $this->personMarginL + $this->personImageWidth + $this->personMarginR >= $this->GetPageWidth() - $this->pageMarginR) { //can we fit another on the page?
                $this->currentY += 50;
                $this->currentX = $this->pageMarginL;
            }
            if ($this->currentY + $this->personImageHeight + 10 >= $this->GetPageHeight() - $this->pageMarginB) {
                $this->addPage();
                $this->drawPageHeader(gettext('PhotoBook') . ' - ' . $this->group->getName() . ' - ' . $roleDisplayName . ' (' . $groupRoleMemberships->count() . ')');
                $this->currentX = $this->pageMarginL;
                $this->currentY += 10;
            }
        }
    }
}
// Instantiate the directory class and build the report.
$pdf = new PdfPhotoBook($iFYID);
foreach ($aGrp as $groupID) {
    $pdf->drawGroup($groupID);
}

if (SystemConfig::getIntValue('iPDFOutputType') === 1) {
    $pdf->Output('ClassList' . date(SystemConfig::getValue('sDateFilenameFormat')) . '.pdf', 'D');
} else {
    $pdf->Output();
}
