<?php
// generate_docx.php
declare(strict_types=1);
ini_set('display_errors','0'); error_reporting(E_ALL);

use PhpOffice\PhpWord\PhpWord;
use PhpOffice\PhpWord\IOFactory;
use PhpOffice\PhpWord\Shared\Html;
use PhpOffice\PhpWord\ComplexType\TblWidth;
use PhpOffice\PhpWord\Style\TOC as TOCStyle;

header('Content-Type: application/json; charset=utf-8');
header('Access-Control-Allow-Methods: POST, OPTIONS');
header('Access-Control-Allow-Headers: Content-Type');
if (($_SERVER['REQUEST_METHOD'] ?? '') === 'OPTIONS') { http_response_code(204); exit; }

require __DIR__ . '/vendor/autoload.php';

try {
    $raw = file_get_contents('php://input') ?: '{}';
    $in  = json_decode($raw, true) ?: [];
    $md  = (string)($in['markdown'] ?? '');
    $ctx = (array)($in['context'] ?? []);

    if ($md === '') throw new RuntimeException('Missing markdown');

    // Simple Markdown → HTML
    $parsedown = new Parsedown();
    $parsedown->setBreaksEnabled(true);
    $htmlBody = $parsedown->text($md);

    $address = $ctx['address'] ?? '';
    $preparedFor = $ctx['prepared_for'] ?? '—';
    $preparedBy  = $ctx['prepared_by']  ?? 'Modulos Design';
    $when = date('j F Y');
    $intent = trim((string)($ctx['project_intent'] ?? ''));

    $pw = new PhpWord();

    // Base styles
    $pw->addTitleStyle(1, ['size'=>20,'bold'=>true,'color'=>'1f2937']);
    $pw->addTitleStyle(2, ['size'=>16,'bold'=>true,'color'=>'334155']);
    $pw->addTitleStyle(3, ['size'=>13,'bold'=>true,'color'=>'475569']);
    $pw->setDefaultFontName('Calibri');
    $pw->setDefaultFontSize(11);

    // COVER SECTION
    $cover = $pw->addSection();
    $cover->addText('Supporting Planning Report', ['bold'=>true,'size'=>28,'color'=>'0f172a'], ['spaceAfter'=>240]);
    if ($address) $cover->addText('Address: '.$address, [], ['spaceAfter'=>120]);
    $cover->addText('Prepared for: '.$preparedFor);
    $cover->addText('Prepared by: '.$preparedBy);
    $cover->addText('Date: '.$when);
    if ($intent) { $cover->addTextBreak(1); $cover->addText('Project intent: '.$intent, ['italic'=>true]); }
    $cover->addPageBreak();

    // TOC SECTION
    $toc = $pw->addSection();
    $toc->addText('Contents', ['bold'=>true,'size'=>18], ['spaceAfter'=>200]);
    $pw->addTableStyle('TOCStyle', [], ['indent'=>0, 'tabLeader'=>TOCStyle::TABLEADER_DOT]);
    $toc->addTOC(['size'=>11], ['tabLeader'=>TOCStyle::TABLEADER_DOT, 'indent'=>0, 'name'=>'TOCStyle']);
    $toc->addPageBreak();

    // BODY SECTION (inject HTML; Parsedown produced h1/h2/h3 → Word titles)
    $body = $pw->addSection();
    Html::addHtml($body, $htmlBody, false, false);

    // Save to tmp and stream URL back (or data URI)
    $tmpDir = sys_get_temp_dir();
    $file   = $tmpDir . '/PlanningReport-' . preg_replace('~[^\w\-]+~','_', $address ?: 'Site') . '.docx';
    IOFactory::createWriter($pw, 'Word2007')->save($file);

    echo json_encode(['ok'=>true, 'url'=>"download.php?file=".basename($file)]);
} catch (Throwable $e) {
    http_response_code(500);
    echo json_encode(['ok'=>false,'error'=>$e->getMessage()]);
}