<?php

namespace Modules\DailyReports\Http\Controllers;

use App\Http\Controllers\Controller;
use Modules\DailyReports\Models\DailyReport;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
use PhpOffice\PhpSpreadsheet\Style\Alignment;
use PhpOffice\PhpSpreadsheet\Style\Border;
use PhpOffice\PhpSpreadsheet\Style\Fill;

class DailyReportExportController extends Controller
{
    public function export(DailyReport $dailyReport)
    {
        $dailyReport->load(['project', 'user', 'labors', 'equipment', 'activities', 'materials', 'issues']);

        $spreadsheet = new Spreadsheet();
        $sheet = $spreadsheet->getActiveSheet();
        $sheet->setTitle('Daily Report');
        $sheet->setShowGridlines(true);

        // Styling helpers
        $headerStyle = [
            'font' => [
                'name' => 'Arial',
                'size' => 16,
                'bold' => true,
                'color' => ['rgb' => 'FFFFFF'],
            ],
            'fill' => [
                'fillType' => Fill::FILL_SOLID,
                'startColor' => ['rgb' => '334155'], // Slate 700
            ],
            'alignment' => [
                'horizontal' => Alignment::HORIZONTAL_CENTER,
                'vertical' => Alignment::VERTICAL_CENTER,
            ],
        ];

        $subHeaderStyle = [
            'font' => [
                'name' => 'Arial',
                'size' => 11,
                'bold' => true,
                'color' => ['rgb' => '334155'],
            ],
            'fill' => [
                'fillType' => Fill::FILL_SOLID,
                'startColor' => ['rgb' => 'F1F5F9'], // Slate 100
            ],
            'alignment' => [
                'vertical' => Alignment::VERTICAL_CENTER,
            ],
            'borders' => [
                'bottom' => [
                    'borderStyle' => Border::BORDER_MEDIUM,
                    'color' => ['rgb' => 'CBD5E1'],
                ],
            ],
        ];

        $sectionTitleStyle = [
            'font' => [
                'name' => 'Arial',
                'size' => 12,
                'bold' => true,
                'color' => ['rgb' => '0F172A'], // Slate 900
            ],
            'fill' => [
                'fillType' => Fill::FILL_SOLID,
                'startColor' => ['rgb' => 'E2E8F0'], // Slate 200
            ],
            'alignment' => [
                'vertical' => Alignment::VERTICAL_CENTER,
            ],
        ];

        $boldLabelStyle = [
            'font' => [
                'name' => 'Arial',
                'size' => 10,
                'bold' => true,
                'color' => ['rgb' => '475569'],
            ],
        ];

        $tableHeaderStyle = [
            'font' => [
                'name' => 'Arial',
                'size' => 10,
                'bold' => true,
                'color' => ['rgb' => '475569'],
            ],
            'fill' => [
                'fillType' => Fill::FILL_SOLID,
                'startColor' => ['rgb' => 'F8FAFC'],
            ],
            'borders' => [
                'bottom' => [
                    'borderStyle' => Border::BORDER_THIN,
                    'color' => ['rgb' => 'E2E8F0'],
                ],
            ],
        ];

        $borderBottomThin = [
            'borders' => [
                'bottom' => [
                    'borderStyle' => Border::BORDER_THIN,
                    'color' => ['rgb' => 'F1F5F9'],
                ],
            ],
        ];

        // 1. Title Block
        $sheet->mergeCells('A1:F1');
        $sheet->setCellValue('A1', 'GSB CONSTRUCTION - DAILY SITE REPORT');
        $sheet->getStyle('A1:F1')->applyFromArray($headerStyle);
        $sheet->getRowDimension(1)->setRowHeight(40);

        // 2. Metadata Block
        $sheet->mergeCells('A3:F3');
        $sheet->setCellValue('A3', ' REPORT METADATA');
        $sheet->getStyle('A3:F3')->applyFromArray($subHeaderStyle);
        $sheet->getRowDimension(3)->setRowHeight(25);

        // Row 4
        $sheet->setCellValue('A4', 'Report Number:');
        $sheet->setCellValue('B4', $dailyReport->report_number);
        $sheet->setCellValue('C4', 'Report Date:');
        $sheet->setCellValue('D4', $dailyReport->report_date ? $dailyReport->report_date->format('Y-m-d') : 'N/A');
        $sheet->setCellValue('E4', 'Prepared By:');
        $sheet->setCellValue('F4', $dailyReport->user ? $dailyReport->user->name : 'N/A');

        // Row 5
        $sheet->setCellValue('A5', 'Project Code:');
        $sheet->setCellValue('B5', $dailyReport->project ? $dailyReport->project->code : 'N/A');
        $sheet->setCellValue('C5', 'Project Name:');
        $sheet->mergeCells('D5:F5');
        $sheet->setCellValue('D5', $dailyReport->project ? $dailyReport->project->name : 'N/A');

        // Row 6
        $sheet->setCellValue('A6', 'Weather:');
        $sheet->setCellValue('B6', $dailyReport->weather ?: 'N/A');
        $sheet->setCellValue('C6', 'Temperature:');
        $sheet->setCellValue('D6', $dailyReport->temperature ? $dailyReport->temperature . ' °C' : 'N/A');
        $sheet->setCellValue('E6', 'Precipitation:');
        $sheet->setCellValue('F6', $dailyReport->precipitation ?: 'N/A');

        // Row 7
        $sheet->setCellValue('A7', 'Wind:');
        $sheet->setCellValue('B7', $dailyReport->wind ?: 'N/A');

        $sheet->getStyle('A4')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('C4')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('E4')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('A5')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('C5')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('A6')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('C6')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('E6')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('A7')->applyFromArray($boldLabelStyle);

        // 2.5. Summary Dashboard Block
        $sheet->mergeCells('A9:F9');
        $sheet->setCellValue('A9', ' SUMMARY & KEY METRICS');
        $sheet->getStyle('A9:F9')->applyFromArray($subHeaderStyle);
        $sheet->getRowDimension(9)->setRowHeight(25);

        // Calculate summary metrics
        $totalWorkers = 0;
        $totalManHours = 0;
        foreach ($dailyReport->labors as $lab) {
            $totalWorkers += $lab->workers_count;
            $totalManHours += $lab->workers_count * ($lab->hours ?: 0);
        }
        $totalEquipmentHours = $dailyReport->equipment->sum('hours_used') ?: 0;
        $avgProgress = $dailyReport->activities->isEmpty() ? 0 : ($dailyReport->activities->avg('percentage_completed') ?: 0);

        // Row 10
        $sheet->setCellValue('A10', 'Tasks Logged:');
        $sheet->setCellValue('B10', count($dailyReport->activities));
        $sheet->setCellValue('C10', 'Materials Logged:');
        $sheet->setCellValue('D10', count($dailyReport->materials));
        $sheet->setCellValue('E10', 'Manpower Count:');
        $sheet->setCellValue('F10', $totalWorkers);

        // Row 11
        $sheet->setCellValue('A11', 'Avg. Progress:');
        $sheet->setCellValue('B11', number_format($avgProgress, 1) . '%');
        $sheet->setCellValue('C11', 'Reported Issues:');
        $sheet->setCellValue('D11', count($dailyReport->issues));
        $sheet->setCellValue('E11', 'Total Man-Hours:');
        $sheet->setCellValue('F11', number_format($totalManHours, 1) . ' hrs');

        // Row 12
        $sheet->setCellValue('A12', 'Active Equipment:');
        $sheet->setCellValue('B12', count($dailyReport->equipment));
        $sheet->setCellValue('C12', 'Equipment Hours:');
        $sheet->setCellValue('D12', number_format($totalEquipmentHours, 1) . ' hrs');

        $sheet->getStyle('A10')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('C10')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('E10')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('A11')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('C11')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('E11')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('A12')->applyFromArray($boldLabelStyle);
        $sheet->getStyle('C12')->applyFromArray($boldLabelStyle);

        $rowIdx = 14;

        // 3. Section A: Tasks
        $sheet->mergeCells("A{$rowIdx}:F{$rowIdx}");
        $sheet->setCellValue("A{$rowIdx}", ' 1. TASKS');
        $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($sectionTitleStyle);
        $sheet->getRowDimension($rowIdx)->setRowHeight(25);
        $rowIdx++;

        // Table Headers
        $sheet->mergeCells("A{$rowIdx}:C{$rowIdx}");
        $sheet->setCellValue("A{$rowIdx}", 'Task Name / Activity');
        $sheet->setCellValue("D{$rowIdx}", 'Zone / Area');
        $sheet->setCellValue("E{$rowIdx}", 'Qty Completed');
        $sheet->setCellValue("F{$rowIdx}", 'Completion %');
        $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($tableHeaderStyle);
        $rowIdx++;

        if ($dailyReport->activities->isEmpty()) {
            $sheet->mergeCells("A{$rowIdx}:F{$rowIdx}");
            $sheet->setCellValue("A{$rowIdx}", 'No work activities reported for this shift.');
            $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray(['font' => ['italic' => true, 'color' => ['rgb' => '94A3B8']]]);
            $rowIdx++;
        } else {
            foreach ($dailyReport->activities as $act) {
                $sheet->mergeCells("A{$rowIdx}:C{$rowIdx}");
                $sheet->setCellValue("A{$rowIdx}", $act->task_name);
                $sheet->setCellValue("D{$rowIdx}", $act->zone_area ?: 'N/A');
                $sheet->setCellValue("E{$rowIdx}", $act->quantity_completed ?: 'N/A');
                $sheet->setCellValue("F{$rowIdx}", $act->percentage_completed ? $act->percentage_completed . '%' : '0%');
                $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($borderBottomThin);
                $rowIdx++;
            }
        }
        $rowIdx++;

        // 4. Section B: Materials
        $sheet->mergeCells("A{$rowIdx}:F{$rowIdx}");
        $sheet->setCellValue("A{$rowIdx}", ' 2. MATERIALS');
        $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($sectionTitleStyle);
        $sheet->getRowDimension($rowIdx)->setRowHeight(25);
        $rowIdx++;

        // Table Headers
        $sheet->mergeCells("A{$rowIdx}:C{$rowIdx}");
        $sheet->setCellValue("A{$rowIdx}", 'Material Name');
        $sheet->setCellValue("D{$rowIdx}", 'Quantity Received / Used');
        $sheet->mergeCells("E{$rowIdx}:F{$rowIdx}");
        $sheet->setCellValue("E{$rowIdx}", 'Condition / Remarks');
        $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($tableHeaderStyle);
        $rowIdx++;

        if ($dailyReport->materials->isEmpty()) {
            $sheet->mergeCells("A{$rowIdx}:F{$rowIdx}");
            $sheet->setCellValue("A{$rowIdx}", 'No materials logged for this date.');
            $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray(['font' => ['italic' => true, 'color' => ['rgb' => '94A3B8']]]);
            $rowIdx++;
        } else {
            foreach ($dailyReport->materials as $mat) {
                $sheet->mergeCells("A{$rowIdx}:C{$rowIdx}");
                $sheet->setCellValue("A{$rowIdx}", $mat->material_name);
                $sheet->setCellValue("D{$rowIdx}", $mat->quantity_received);
                $sheet->mergeCells("E{$rowIdx}:F{$rowIdx}");
                $sheet->setCellValue("E{$rowIdx}", $mat->condition ?: 'Good');
                $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($borderBottomThin);
                $rowIdx++;
            }
        }
        $rowIdx++;

        // 5. Section C: Labor & Manpower
        $sheet->mergeCells("A{$rowIdx}:F{$rowIdx}");
        $sheet->setCellValue("A{$rowIdx}", ' 3. MANPOWER/LABOR');
        $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($sectionTitleStyle);
        $sheet->getRowDimension($rowIdx)->setRowHeight(25);
        $rowIdx++;

        // Table Headers
        $sheet->mergeCells("A{$rowIdx}:B{$rowIdx}");
        $sheet->setCellValue("A{$rowIdx}", 'Labor Trade / Profession');
        $sheet->setCellValue("C{$rowIdx}", 'Workers Count');
        $sheet->setCellValue("D{$rowIdx}", 'Hours Rendered');
        $sheet->mergeCells("E{$rowIdx}:F{$rowIdx}");
        $sheet->setCellValue("E{$rowIdx}", 'Notes / Details');
        $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($tableHeaderStyle);
        $rowIdx++;

        if ($dailyReport->labors->isEmpty()) {
            $sheet->mergeCells("A{$rowIdx}:F{$rowIdx}");
            $sheet->setCellValue("A{$rowIdx}", 'No labor resources logged.');
            $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray(['font' => ['italic' => true, 'color' => ['rgb' => '94A3B8']]]);
            $rowIdx++;
        } else {
            foreach ($dailyReport->labors as $lab) {
                $sheet->mergeCells("A{$rowIdx}:B{$rowIdx}");
                $sheet->setCellValue("A{$rowIdx}", $lab->trade);
                $sheet->setCellValue("C{$rowIdx}", $lab->workers_count);
                $sheet->setCellValue("D{$rowIdx}", $lab->hours);
                $sheet->mergeCells("E{$rowIdx}:F{$rowIdx}");
                $sheet->setCellValue("E{$rowIdx}", $lab->notes ?: '');
                $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($borderBottomThin);
                $rowIdx++;
            }
        }
        $rowIdx++;

        // 6. Section D: Equipment Usage
        $sheet->mergeCells("A{$rowIdx}:F{$rowIdx}");
        $sheet->setCellValue("A{$rowIdx}", ' 4. EQUIPMENT');
        $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($sectionTitleStyle);
        $sheet->getRowDimension($rowIdx)->setRowHeight(25);
        $rowIdx++;

        // Table Headers
        $sheet->mergeCells("A{$rowIdx}:C{$rowIdx}");
        $sheet->setCellValue("A{$rowIdx}", 'Equipment Name');
        $sheet->setCellValue("D{$rowIdx}", 'Hours Used');
        $sheet->mergeCells("E{$rowIdx}:F{$rowIdx}");
        $sheet->setCellValue("E{$rowIdx}", 'Status (Active / Idle)');
        $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($tableHeaderStyle);
        $rowIdx++;

        if ($dailyReport->equipment->isEmpty()) {
            $sheet->mergeCells("A{$rowIdx}:F{$rowIdx}");
            $sheet->setCellValue("A{$rowIdx}", 'No equipment usage logged.');
            $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray(['font' => ['italic' => true, 'color' => ['rgb' => '94A3B8']]]);
            $rowIdx++;
        } else {
            foreach ($dailyReport->equipment as $eq) {
                $sheet->mergeCells("A{$rowIdx}:C{$rowIdx}");
                $sheet->setCellValue("A{$rowIdx}", $eq->equipment_name);
                $sheet->setCellValue("D{$rowIdx}", $eq->hours_used);
                $sheet->mergeCells("E{$rowIdx}:F{$rowIdx}");
                $sheet->setCellValue("E{$rowIdx}", ucfirst($eq->status));
                $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($borderBottomThin);
                $rowIdx++;
            }
        }
        $rowIdx++;

        // 7. Section E: Reported Issues & Delays
        $sheet->mergeCells("A{$rowIdx}:F{$rowIdx}");
        $sheet->setCellValue("A{$rowIdx}", ' 5. ISSUES & CONCERN');
        $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($sectionTitleStyle);
        $sheet->getRowDimension($rowIdx)->setRowHeight(25);
        $rowIdx++;

        // Table Headers
        $sheet->mergeCells("A{$rowIdx}:B{$rowIdx}");
        $sheet->setCellValue("A{$rowIdx}", 'Issue / Delay Type');
        $sheet->mergeCells("C{$rowIdx}:E{$rowIdx}");
        $sheet->setCellValue("C{$rowIdx}", 'Description');
        $sheet->setCellValue("F{$rowIdx}", 'Delay Impact (Hrs)');
        $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($tableHeaderStyle);
        $rowIdx++;

        if ($dailyReport->issues->isEmpty()) {
            $sheet->mergeCells("A{$rowIdx}:F{$rowIdx}");
            $sheet->setCellValue("A{$rowIdx}", 'No major issues or delays reported.');
            $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray(['font' => ['italic' => true, 'color' => ['rgb' => '94A3B8']]]);
            $rowIdx++;
        } else {
            foreach ($dailyReport->issues as $iss) {
                $sheet->mergeCells("A{$rowIdx}:B{$rowIdx}");
                $sheet->setCellValue("A{$rowIdx}", ucfirst(str_replace('_', ' ', $iss->issue_type)));
                $sheet->mergeCells("C{$rowIdx}:E{$rowIdx}");
                $sheet->setCellValue("C{$rowIdx}", $iss->description);
                $sheet->setCellValue("F{$rowIdx}", $iss->delay_impact ?: '0');
                $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($borderBottomThin);
                $rowIdx++;
            }
        }
        $rowIdx++;

        // 8. General Remarks
        $sheet->mergeCells("A{$rowIdx}:F{$rowIdx}");
        $sheet->setCellValue("A{$rowIdx}", ' GENERAL REMARKS & NOTES');
        $sheet->getStyle("A{$rowIdx}:F{$rowIdx}")->applyFromArray($subHeaderStyle);
        $rowIdx++;

        $sheet->mergeCells("A{$rowIdx}:F" . ($rowIdx + 3));
        $sheet->setCellValue("A{$rowIdx}", $dailyReport->remarks ?: 'No additional remarks entered.');
        $sheet->getStyle("A{$rowIdx}:F" . ($rowIdx + 3))->applyFromArray([
            'alignment' => [
                'vertical' => Alignment::VERTICAL_TOP,
                'wrapText' => true
            ],
            'font' => ['italic' => !$dailyReport->remarks]
        ]);

        // Auto-fit column widths
        foreach (range('A', 'F') as $col) {
            $sheet->getColumnDimension($col)->setAutoSize(true);
        }

        // Output Excel response
        $filename = 'DailyReport_' . ($dailyReport->project ? $dailyReport->project->code : '') . '_' . $dailyReport->report_date->format('Ymd') . '.xlsx';
        
        header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
        header('Content-Disposition: attachment;filename="' . $filename . '"');
        header('Cache-Control: max-age=0');

        $writer = new Xlsx($spreadsheet);
        $writer->save('php://output');
        exit;
    }

    public function pdf(DailyReport $dailyReport)
    {
        $dailyReport->load(['project', 'user', 'labors', 'equipment', 'activities', 'materials', 'issues']);

        // Calculate summary metrics
        $totalWorkers = 0;
        $totalManHours = 0;
        foreach ($dailyReport->labors as $lab) {
            $totalWorkers += $lab->workers_count;
            $totalManHours += $lab->workers_count * ($lab->hours ?: 0);
        }

        $totalEquipmentHours = 0;
        foreach ($dailyReport->equipment as $eq) {
            $totalEquipmentHours += $eq->hours_used ?: 0;
        }

        $avgProgress = 0;
        if (!$dailyReport->activities->isEmpty()) {
            $avgProgress = $dailyReport->activities->avg('percentage_completed') ?: 0;
        }

        $summary = [
            'total_workers' => $totalWorkers,
            'total_man_hours' => $totalManHours,
            'total_equipment_hours' => $totalEquipmentHours,
            'avg_progress' => $avgProgress,
        ];

        $pdf = \Barryvdh\DomPDF\Facade\Pdf::loadView('dailyreports::pdf.daily-report', [
            'report' => $dailyReport,
            'summary' => $summary,
        ]);

        $filename = 'DailyReport_' . ($dailyReport->project ? $dailyReport->project->code : '') . '_' . $dailyReport->report_date->format('Ymd') . '.pdf';
        
        return $pdf->download($filename);
    }
}