<?php
declare(strict_types=1);
/**
 * TKLM XLSX minimalny: natywny Office Open XML, ZIP bez rozszerzenia ZipArchive
 * i bez plików tymczasowych. Wykorzystywany do dziennego planu sali.
 */
function polana_xlsx_xml(string $value): string
{
    // XML 1.0 nie obsługuje części znaków kontrolnych.
    $value = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F]/u', ' ', $value) ?? '';
    return htmlspecialchars($value, ENT_QUOTES | ENT_XML1 | ENT_SUBSTITUTE, 'UTF-8');
}

function polana_xlsx_column(int $index): string
{
    $str = '';
    for ($i = $index + 1; $i > 0; $i = intdiv($i - 1, 26)) {
        $str = chr(65 + ($i - 1) % 26) . $str;
    }
    return $str;
}

function polana_xlsx_cell(int $col, int $row, mixed $value, int $style = 0, bool $number = false): string
{
    $ref = polana_xlsx_column($col) . $row;
    if ($number) {
        return '<c r="' . $ref . '" s="' . $style . '"><v>' . (int)$value . '</v></c>';
    }
    // inlineStr zabezpiecza przed formułami Excel/CSV injection także dla =,+,-,@.
    $value = (string)$value;
    if (strlen($value) > 32000) $value = substr($value, 0, 32000);
    return '<c r="' . $ref . '" s="' . $style . '" t="inlineStr"><is><t xml:space="preserve">'
         . polana_xlsx_xml($value) . '</t></is></c>';
}

/** @param array<int,string> $files */
function polana_xlsx_zip(array $files): string
{
    $fileEntries = '';
    $central = '';
    $offset = 0;
    foreach ($files as $filename => $contents) {
        $length = strlen($contents);
        $nameLength = strlen($filename);
        $crc = crc32($contents);
        // ZIP STORED bez kompresji; brak zależności od PHP zip, zlib i /tmp.
        $local = pack('VvvvvvVVVvv', 0x04034b50, 20, 0, 0, 0, 0, $crc, $length, $length, $nameLength, 0) . $filename;
        $fileEntries .= $local . $contents;
        $central .= pack('VvvvvvvVVVvvvvvVV', 0x02014b50, 20, 20, 0, 0, 0, 0, $crc, $length, $length, $nameLength, 0, 0, 0, 0, 0, $offset) . $filename;
        $offset += strlen($local) + $length;
    }
    $num = count($files);
    return $fileEntries . $central . pack('VvvvvVVv', 0x06054b50, 0, 0, $num, $num, strlen($central), $offset, 0);
}

/** @param array<int,array<string,mixed>> $rows @param array<int,array<string,int>> $hours */
function polana_reservation_xlsx(string $date, array $rows, array $hours, array $counts): string
{
    $names = ['Godzina','Gość','Osoby','Status','Stolik','Kelner','Telefon','Uwagi gościa','Uwagi obsługi','Kod','Kontrola'];
    $body = '';
    $rowNum = 7;
    foreach ($rows as $r) {
        $line = [
            substr((string)$r['reservation_time'], 0, 5), (string)$r['guest_name'], (int)$r['guests'],
            (string)($r['_status_label'] ?? ''), (string)($r['table_label'] ?? ''), (string)($r['_waiter_name'] ?? ''),
            (string)($r['phone'] ?? ''), (string)($r['notes'] ?? ''), (string)($r['internal_note'] ?? ''),
            (string)($r['reservation_code'] ?? ''), !empty($r['_duplicate']) ? 'MOŻLIWY DUPLIKAT' : '',
        ];
        $cells = '';
        $style = !empty($r['_duplicate']) ? 5 : (((string)($r['status'] ?? '') === 'new') ? 4 : 0);
        foreach ($line as $i => $val) {
            $cells .= polana_xlsx_cell($i, $rowNum, $val, ($i === 2 ? 3 : $style), $i === 2);
        }
        $body .= '<row r="' . $rowNum . '" ht="28" customHeight="1">' . $cells . '</row>';
        $rowNum++;
    }
    $cols = [10,26,10,19,14,24,17,45,45,26,22];
    $columnXml = '';
    foreach ($cols as $i => $width) {
        $col = $i + 1;
        $columnXml .= '<col min="' . $col . '" max="' . $col . '" width="' . $width . '" customWidth="1"/>';
    }
    $headerCells = '';
    foreach ($names as $i => $name) $headerCells .= polana_xlsx_cell($i, 6, $name, 2);
    $sum = 'Zgłoszenia: ' . $counts['requests'] . '  |  Osoby (wszystkie): ' . $counts['guests']
         . '  |  Potwierdzone: ' . $counts['confirmed'] . '  |  Nowe: ' . $counts['new'];
    $warn = 'Możliwe powtórzenia: ' . $counts['duplicates'] . '  |  Osoby bez możliwych powtórzeń (szacunek): ' . $counts['estimated_guests']
          . '  |  Uwaga: nie kasowano żadnych zgłoszeń; zweryfikuj z obsługą.';
    $sheet1 = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>'
        . '<worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">'
        . '<sheetViews><sheetView workbookViewId="0"><pane ySplit="6" topLeftCell="A7" activePane="bottomLeft" state="frozen"/></sheetView></sheetViews>'
        . '<cols>' . $columnXml . '</cols><sheetData>'
        . '<row r="1">' . polana_xlsx_cell(0, 1, 'MOJA POLANA SMAKÓW – PLAN SALI', 1) . '</row>'
        . '<row r="2">' . polana_xlsx_cell(0, 2, 'Dzień: ' . date('d.m.Y', strtotime($date)), 1) . '</row>'
        . '<row r="3">' . polana_xlsx_cell(0, 3, $sum, 6) . '</row>'
        . '<row r="4">' . polana_xlsx_cell(0, 4, $warn, 5) . '</row>'
        . '<row r="6" ht="30" customHeight="1">' . $headerCells . '</row>'
        . $body . '</sheetData><mergeCells count="4"><mergeCell ref="A1:K1"/><mergeCell ref="A2:K2"/><mergeCell ref="A3:K3"/><mergeCell ref="A4:K4"/></mergeCells>'
        . '<autoFilter ref="A6:K' . max(6, $rowNum - 1) . '"/>'
        . '<pageMargins left="0.3" right="0.3" top="0.45" bottom="0.45" header="0.2" footer="0.2"/>'
        . '<pageSetup orientation="landscape" paperSize="9" fitToWidth="1"/>'
        . '</worksheet>';
    $rows2 = '<row r="1">' . polana_xlsx_cell(0,1,'MOJA POLANA SMAKÓW – REZERWACJE WG GODZIN',1) . '</row>'
           . '<row r="2">' . polana_xlsx_cell(0,2,'Termin: '.date('d.m.Y',strtotime($date)),1) . '</row>'
           . '<row r="4">' . polana_xlsx_cell(0,4,'Godzina',2) . polana_xlsx_cell(1,4,'Rezerwacje',2) . polana_xlsx_cell(2,4,'Osoby',2) . polana_xlsx_cell(3,4,'Podejrzane powtórzenia',2) . '</row>';
    $idx = 5;
    foreach ($hours as $hour => $h) {
        $rows2 .= '<row r="' . $idx . '">' . polana_xlsx_cell(0,$idx,$hour)
                . polana_xlsx_cell(1,$idx,$h['requests'],3,true)
                . polana_xlsx_cell(2,$idx,$h['guests'],3,true)
                . polana_xlsx_cell(3,$idx,$h['duplicates'],3,true) . '</row>';
        $idx++;
    }
    $rows2 .= '<row r="' . ($idx+1) . '">' . polana_xlsx_cell(0,$idx+1,'RAZEM',2)
            . polana_xlsx_cell(1,$idx+1,$counts['requests'],3,true)
            . polana_xlsx_cell(2,$idx+1,$counts['guests'],3,true)
            . polana_xlsx_cell(3,$idx+1,$counts['duplicates'],3,true) . '</row>';
    $sheet2 = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>'
       . '<worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">'
       . '<cols><col min="1" max="1" width="16" customWidth="1"/><col min="2" max="3" width="20" customWidth="1"/><col min="4" max="4" width="27" customWidth="1"/></cols>'
       . '<sheetData>' . $rows2 . '</sheetData><mergeCells count="2"><mergeCell ref="A1:D1"/><mergeCell ref="A2:D2"/></mergeCells></worksheet>';
    $styles = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>'
       . '<styleSheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main">'
       . '<fonts count="3"><font><sz val="11"/><name val="Aptos"/></font><font><b/><sz val="17"/><color rgb="FFFFFFFF"/><name val="Aptos Display"/></font><font><b/><sz val="11"/><color rgb="FF212B24"/><name val="Aptos"/></font></fonts>'
       . '<fills count="6"><fill><patternFill patternType="none"/></fill><fill><patternFill patternType="gray125"/></fill><fill><patternFill patternType="solid"><fgColor rgb="FF31533D"/><bgColor indexed="64"/></patternFill></fill><fill><patternFill patternType="solid"><fgColor rgb="FFDAE7D6"/><bgColor indexed="64"/></patternFill></fill><fill><patternFill patternType="solid"><fgColor rgb="FFFFF1D7"/><bgColor indexed="64"/></patternFill></fill><fill><patternFill patternType="solid"><fgColor rgb="FFFFDEDC"/><bgColor indexed="64"/></patternFill></fill></fills>'
       . '<borders count="1"><border><left/><right/><top/><bottom/><diagonal/></border></borders>'
       . '<cellStyleXfs count="1"><xf numFmtId="0" fontId="0" fillId="0" borderId="0"/></cellStyleXfs>'
       . '<cellXfs count="7">'
       . '<xf numFmtId="0" fontId="0" fillId="0" borderId="0" xfId="0"/>'
       . '<xf numFmtId="0" fontId="1" fillId="2" borderId="0" xfId="0" applyFill="1" applyFont="1"/>'
       . '<xf numFmtId="0" fontId="2" fillId="3" borderId="0" xfId="0" applyFill="1" applyFont="1"/>'
       . '<xf numFmtId="1" fontId="2" fillId="0" borderId="0" xfId="0" applyNumberFormat="1"/>'
       . '<xf numFmtId="0" fontId="0" fillId="4" borderId="0" xfId="0" applyFill="1"/>'
       . '<xf numFmtId="0" fontId="0" fillId="5" borderId="0" xfId="0" applyFill="1"/>'
       . '<xf numFmtId="0" fontId="2" fillId="0" borderId="0" xfId="0" applyFont="1"/>'
       . '</cellXfs><cellStyles count="1"><cellStyle name="Normal" xfId="0" builtinId="0"/></cellStyles>'
       . '</styleSheet>';
    return polana_xlsx_zip([
        '[Content_Types].xml' => '<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types"><Default Extension="rels" ContentType="application/vnd.openxmlformats-package.relationships+xml"/><Default Extension="xml" ContentType="application/xml"/><Override PartName="/xl/workbook.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml"/><Override PartName="/xl/worksheets/sheet1.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"/><Override PartName="/xl/worksheets/sheet2.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml"/><Override PartName="/xl/styles.xml" ContentType="application/vnd.openxmlformats-officedocument.spreadsheetml.styles+xml"/></Types>',
        '_rels/.rels' => '<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument" Target="xl/workbook.xml"/></Relationships>',
        'xl/workbook.xml' => '<?xml version="1.0" encoding="UTF-8" standalone="yes"?><workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"><sheets><sheet name="Lista rezerwacji" sheetId="1" r:id="rId1"/><sheet name="Godziny" sheetId="2" r:id="rId2"/></sheets></workbook>',
        'xl/_rels/workbook.xml.rels' => '<?xml version="1.0" encoding="UTF-8" standalone="yes"?><Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet" Target="worksheets/sheet1.xml"/><Relationship Id="rId2" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet" Target="worksheets/sheet2.xml"/><Relationship Id="rId3" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles" Target="styles.xml"/></Relationships>',
        'xl/styles.xml' => $styles,
        'xl/worksheets/sheet1.xml' => $sheet1,
        'xl/worksheets/sheet2.xml' => $sheet2,
    ]);
}