@extends(
    ! empty($previewBrowsershotPdf) || empty($previewPdfExport)
        ? 'layouts.report-preview'
        : 'layouts.report-preview-pdf'
)

@section('content')
@php
    use App\Support\MecReportType;
    $usesReportHtml = ! empty($previewUsesReportHtmlLayout);
    $htmlPageTotal = $usesReportHtml
        ? MecReportType::previewReportHtmlPageTotal((string) ($reportType ?? ''), $previewMecSectorId ?? null)
        : (int) ($previewPageTotal ?? 0);
    $htmlPageNum = 0;
    $hasCoverSheet = in_array('cover', $previewSheets, true)
        || in_array('pmr_cover', $previewSheets, true)
        || in_array('sar_cover', $previewSheets, true)
        || in_array('drr_cover', $previewSheets, true);
    $htmlContentPageTotal = max(1, $htmlPageTotal - ($hasCoverSheet ? 1 : 0));
    $legacyContentPageTotal = max(1, (int) ($previewPageTotal ?? 0) - ($hasCoverSheet ? 1 : 0));
    $previewPageGroups = $usesReportHtml
        ? MecReportType::previewReportHtmlPageGroups((string) ($reportType ?? ''), $previewMecSectorId ?? null)
        : array_map(static fn (string $sheet): array => [$sheet], $previewSheets);
    $isBrowserPreview = empty($previewBrowsershotPdf) && empty($previewPdfExport);

    if ($usesReportHtml && ! empty($previewBrowsershotPdf)) {
        $mergedGroups = [];
        for ($gi = 0, $gn = count($previewPageGroups); $gi < $gn; $gi++) {
            if (($previewPageGroups[$gi][0] ?? '') === 'part_e2_e3') {
                $landscapeFlow = ['part_e2_matrix', 'part_e3_assessment'];
                $gi++;
                while ($gi < $gn) {
                    $nextGroup = $previewPageGroups[$gi];
                    if ($nextGroup === ['part_f_compliance', 'part_g']) {
                        $landscapeFlow[] = 'part_f_compliance';
                        $landscapeFlow[] = 'part_g';
                        $gi++;
                        break;
                    }
                    if (($nextGroup[0] ?? '') === 'part_f_compliance') {
                        $landscapeFlow[] = 'part_f_compliance';
                        $gi++;
                        if ($gi < $gn && ($previewPageGroups[$gi][0] ?? '') === 'part_g') {
                            $landscapeFlow[] = 'part_g';
                            $gi++;
                        }
                        break;
                    }
                    if (($nextGroup[0] ?? '') === 'part_g') {
                        $landscapeFlow[] = 'part_g';
                        $gi++;
                        break;
                    }
                    break;
                }
                $mergedGroups[] = $landscapeFlow;

                continue;
            }
            if (($previewPageGroups[$gi][0] ?? '') === 'part_f_compliance') {
                $previousGroup = $mergedGroups[array_key_last($mergedGroups)] ?? [];
                if (in_array('part_f_compliance', $previousGroup, true)) {
                    $gi++;

                    continue;
                }
            }
            if (($previewPageGroups[$gi][0] ?? '') === 'part_g') {
                $previousGroup = $mergedGroups[array_key_last($mergedGroups)] ?? [];
                if (in_array('part_g', $previousGroup, true)) {
                    $gi++;

                    continue;
                }
            }
            $mergedGroups[] = $previewPageGroups[$gi];
        }
        $previewPageGroups = $mergedGroups;

        $htmlContentPageTotal = 0;
        foreach ($previewPageGroups as $browsershotGroup) {
            if (! in_array($browsershotGroup[0] ?? '', ['cover', 'pmr_cover'], true)) {
                $htmlContentPageTotal++;
            }
        }
        $htmlContentPageTotal = max(1, $htmlContentPageTotal);
    }

    $g1AdditionalDocCount = 0;
    if (MecReportType::isCmr((string) ($reportType ?? ''))) {
        $g1AdditionalRows = data_get($report ?? [], 'part_g.additional_picture_documents', []);
        if (is_array($g1AdditionalRows)) {
            foreach ($g1AdditionalRows as $g1AdditionalRow) {
                if (! is_array($g1AdditionalRow)) {
                    continue;
                }
                $hasG1Additional = trim((string) ($g1AdditionalRow['attachment_storage'] ?? '')) !== ''
                    || trim((string) ($g1AdditionalRow['attachment_original_name'] ?? '')) !== '';
                if ($hasG1Additional) {
                    $g1AdditionalDocCount++;
                }
            }
        }
    }
    if ($g1AdditionalDocCount > 1) {
        $htmlContentPageTotal += $g1AdditionalDocCount - 1;
    }

    /*
     * One portrait page-container for Part A financial → Part D (Part B is its own landscape page).
     */
    if ($usesReportHtml) {
        $portraitFlowSheetSet = array_flip([
            'pmr_part_a_profile',
            'part_a_financial',
            'part_c_part1',
            'part_c_part2',
            'pmr_part_c',
            'part_d_e1',
            'pmr_part_d_e1',
        ]);
        $nonFlowPrimarySheets = [
            'cover',
            'pmr_cover',
            'part_a_profile',
            'pmr_part_a_profile',
            'part_b',
            'pmr_part_b',
            'part_e2_matrix',
            'part_e3_assessment',
            'part_e2_e3',
            'part_f_compliance',
            'part_g',
            'part_g_additional_documents',
            'pmr_part_f',
        ];
        $coalescedGroups = [];
        $flowBuffer = [];

        foreach ($previewPageGroups as $group) {
            $primary = $group[0] ?? '';

            if (in_array($primary, $nonFlowPrimarySheets, true)) {
                if ($flowBuffer !== []) {
                    $coalescedGroups[] = $flowBuffer;
                    $flowBuffer = [];
                }
                $coalescedGroups[] = $group;

                continue;
            }

            foreach ($group as $sheet) {
                if (isset($portraitFlowSheetSet[$sheet])) {
                    $flowBuffer[] = $sheet;
                } else {
                    if ($flowBuffer !== []) {
                        $coalescedGroups[] = $flowBuffer;
                        $flowBuffer = [];
                    }
                    $coalescedGroups[] = [$sheet];
                }
            }
        }

        if ($flowBuffer !== []) {
            $coalescedGroups[] = $flowBuffer;
        }

        $previewPageGroups = $coalescedGroups;

        /*
         * PDF: portrait flow for Part A → financial / Part C → D (Part B is landscape, same as Part E).
         */
        if (! empty($previewBrowsershotPdf)) {
            $pdfPortraitSheetSet = array_flip([
                'part_a_profile',
                'pmr_part_a_profile',
                'part_a_financial',
                'part_c_part1',
                'part_c_part2',
                'pmr_part_c',
                'part_d_e1',
                'pmr_part_d_e1',
            ]);
            $pdfPortraitMerged = [];
            $pdfPortraitBuffer = [];

            foreach ($previewPageGroups as $pdfGroup) {
                $pdfGroupIsPortraitFlow = $pdfGroup !== []
                    && ! in_array($pdfGroup[0] ?? '', ['cover', 'pmr_cover'], true)
                    && collect($pdfGroup)->every(static fn (string $sheet): bool => isset($pdfPortraitSheetSet[$sheet]));

                if ($pdfGroupIsPortraitFlow) {
                    foreach ($pdfGroup as $pdfSheet) {
                        $pdfPortraitBuffer[] = $pdfSheet;
                    }

                    continue;
                }

                if ($pdfPortraitBuffer !== []) {
                    $pdfPortraitMerged[] = $pdfPortraitBuffer;
                    $pdfPortraitBuffer = [];
                }

                $pdfPortraitMerged[] = $pdfGroup;
            }

            if ($pdfPortraitBuffer !== []) {
                $pdfPortraitMerged[] = $pdfPortraitBuffer;
            }

            $previewPageGroups = $pdfPortraitMerged;
        }

        $htmlContentPageTotal = 0;
        foreach ($previewPageGroups as $contentGroup) {
            if (! in_array($contentGroup[0] ?? '', ['cover', 'pmr_cover'], true)) {
                $htmlContentPageTotal++;
            }
        }
        $htmlContentPageTotal = max(1, $htmlContentPageTotal);
    }
@endphp
@include('reports.preview.partials.publish-letter-sheet')
@foreach ($previewPageGroups as $group)
    @php
        $primarySheet = $group[0];
        $isSarDoc = MecReportType::isSar((string) ($reportType ?? ''));
        $isDrrDoc = MecReportType::isDrr((string) ($reportType ?? ''));
        if ($usesReportHtml) {
            if (in_array($primarySheet, ['cover', 'pmr_cover'], true)) {
                $sheetPageNum = null;
                $sheetPageTotal = $htmlContentPageTotal;
            } else {
                $htmlPageNum++;
                $sheetPageNum = $htmlPageNum;
                $sheetPageTotal = $htmlContentPageTotal;
            }
        } elseif ($isSarDoc && $primarySheet === 'sar_cover') {
            $sheetPageNum = null;
            $sheetPageTotal = max(1, count($previewSheets) - 1);
        } elseif ($isSarDoc) {
            $sheetPageNum = array_search($primarySheet, $previewSheets, true);
            $sheetPageTotal = max(1, count($previewSheets) - 1);
        } elseif ($isDrrDoc && $primarySheet === 'drr_cover') {
            $sheetPageNum = null;
            $sheetPageTotal = count($previewSheets) - 1;
        } elseif ($isDrrDoc) {
            $sheetPageNum = array_search($primarySheet, $previewSheets, true);
            $sheetPageTotal = count($previewSheets) - 1;
        } elseif ($primarySheet === 'cover') {
            $sheetPageNum = null;
            $sheetPageTotal = $legacyContentPageTotal;
        } elseif ($hasCoverSheet) {
            $sheetPageNum = array_search($primarySheet, $previewSheets, true);
            $sheetPageTotal = $legacyContentPageTotal;
        } else {
            $sheetPageNum = array_search($primarySheet, $previewSheets, true) + 1;
            $sheetPageTotal = $previewPageTotal;
        }
        $landscapePage = $usesReportHtml && (
            in_array('part_b', $group, true)
            || in_array('pmr_part_b', $group, true)
            || in_array('part_e2_e3', $group, true)
            || in_array('part_e2_matrix', $group, true)
            || in_array('part_e3_assessment', $group, true)
            || in_array('part_f_compliance', $group, true)
            || (MecReportType::isCmr((string) ($reportType ?? '')) && in_array('part_g', $group, true))
        );
        $skipReportHtmlWrapper = in_array($primarySheet, ['cover', 'pmr_cover', 'part_g_additional_documents'], true)
            || (in_array($primarySheet, ['part_a_profile', 'pmr_part_a_profile'], true) && count($group) === 1 && empty($previewBrowsershotPdf));
        $previewOwnPageShell = in_array($primarySheet, ['part_a_profile', 'pmr_part_a_profile'], true) && $skipReportHtmlWrapper;
        $isCombinedGroup = count($group) > 1;
        $isMergedFinancialPartB = $isCombinedGroup
            && in_array('part_a_financial', $group, true)
            && (in_array('part_b', $group, true) || in_array('pmr_part_b', $group, true));
        $closePageNum = $sheetPageNum;
        $closePageTotal = $sheetPageTotal;
        if ($isMergedFinancialPartB && $sheetPageNum !== null) {
            $closePageNum = (int) $sheetPageNum + 1;
        }
        $showReportPageHeader = $closePageNum !== null
            && is_numeric($closePageNum)
            && is_numeric($closePageTotal)
            && (int) $closePageTotal > 0
            && ((int) $closePageNum === 1 || (int) $closePageNum === (int) $closePageTotal);
        $showReportPageChrome = $showReportPageHeader;
        $showFooterDisclaimer = ! $isSarDoc && ! $isDrrDoc
            && $isBrowserPreview
            && $closePageNum !== null
            && is_numeric($closePageNum)
            && is_numeric($closePageTotal)
            && (int) $closePageTotal > 0
            && (int) $closePageNum === (int) $closePageTotal;
    @endphp
    @php ob_start(); @endphp
    @foreach ($group as $groupSheet)
        @php
            $sheetPageNumForSheet = $sheetPageNum;
            if ($isMergedFinancialPartB && in_array($groupSheet, ['part_b', 'pmr_part_b'], true) && $sheetPageNum !== null) {
                $sheetPageNumForSheet = (int) $sheetPageNum + 1;
            }
        @endphp
        @include('reports.preview.sheets.'.$groupSheet, [
            'pageNum' => $sheetPageNumForSheet,
            'pageTotal' => $sheetPageTotal,
            'previewMecSectorId' => $previewMecSectorId ?? null,
            'landscapePage' => $landscapePage,
            'previewCombinedPage' => $isCombinedGroup,
            'previewCombinedContinuation' => $isCombinedGroup && $groupSheet !== $primarySheet,
            'previewInlineFooterAfterChart' => $isMergedFinancialPartB && $groupSheet === 'part_a_financial',
            'previewMergedWithPartB' => $isMergedFinancialPartB && in_array($groupSheet, ['part_b', 'pmr_part_b'], true),
            'previewBrowsershotPdf' => ! empty($previewBrowsershotPdf),
            'showReportPageHeader' => $showReportPageHeader,
            'previewOwnPageShell' => $previewOwnPageShell,
            'showFooterDisclaimer' => $showFooterDisclaimer,
            'previewPdfExport' => ! empty($previewPdfExport),
        ])
    @endforeach
    @php
        $groupSheetHtml = (string) ob_get_clean();
        $alwaysKeepSheets = [
            'cover', 'pmr_cover', 'sar_cover', 'drr_cover',
            'part_a_profile', 'pmr_part_a_profile',
            'sar_sheet1', 'ddr_sheet1', 'ddr_sheet2', 'ddr_sheet3',
        ];
        $groupHasContent = in_array($primarySheet, $alwaysKeepSheets, true)
            || \App\Services\ReportPreviewPresenter::previewRenderedGroupHasContent($groupSheetHtml);
        if (! $groupHasContent && $usesReportHtml && ! in_array($primarySheet, ['cover', 'pmr_cover'], true)) {
            $htmlPageNum = max(0, $htmlPageNum - 1);
        }
    @endphp
    @if ($groupHasContent)
    @if ($usesReportHtml && ! $skipReportHtmlWrapper)
        @include('reports.preview.partials.report-html-page-open', [
            'landscapePage' => $landscapePage,
            'showReportPageHeader' => $showReportPageChrome,
            'showFooterDisclaimer' => $showFooterDisclaimer,
        ])
    @endif
    {!! $groupSheetHtml !!}
    @if ($usesReportHtml && ! $skipReportHtmlWrapper)
        @include('reports.preview.partials.report-html-page-close', [
            'pageNum' => $closePageNum,
            'pageTotal' => $closePageTotal,
            'showReportPageChrome' => $showReportPageChrome,
            'showFooterDisclaimer' => $showFooterDisclaimer,
            'previewBrowsershotPdf' => ! empty($previewBrowsershotPdf),
            'previewPdfExport' => ! empty($previewPdfExport),
        ])
    @endif
    @endif
@endforeach
@include('reports.preview.partials.section-head-keep-with-table-script')
@endsection