<?php

namespace App\Exports;

use App\Services\TechnicianReportService;
use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\WithHeadings;
use Maatwebsite\Excel\Concerns\WithStyles;
use Maatwebsite\Excel\Concerns\WithColumnWidths;
use Maatwebsite\Excel\Concerns\WithEvents;
use Maatwebsite\Excel\Events\AfterSheet;
use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
use PhpOffice\PhpSpreadsheet\Style\Alignment;
use PhpOffice\PhpSpreadsheet\Style\Fill;
use PhpOffice\PhpSpreadsheet\Style\Border;
use Illuminate\Support\Facades\Log;
use Carbon\Carbon;

class TechnicianReportExport implements FromCollection, WithHeadings, WithStyles, WithColumnWidths, WithEvents
{
    protected $dealerId;
    protected $startDate;
    protected $endDate;
    protected $technicianReportService;
    protected $mechanics;
    protected $headings;
    protected $filterInfo;

    public function __construct($dealerId = null, $startDate = null, $endDate = null)
    {
        $this->dealerId = $dealerId;
        $this->startDate = $startDate;
        $this->endDate = $endDate;
        $this->technicianReportService = new TechnicianReportService();
        
        // Get mechanics and prepare headings
        $this->prepareHeadings();
        $this->prepareFilterInfo();
    }

    private function prepareHeadings()
    {
        try {
            $reportData = $this->technicianReportService->getTechnicianReportData(
                $this->dealerId, 
                $this->startDate, 
                $this->endDate
            );
            
            $this->mechanics = $reportData['mechanics'];
            
            // Build headings - simplified structure
            $this->headings = [
                'No',
                'Nama Pekerjaan',
                'Kode Pekerjaan',
                'Kategori'
            ];
            
            // Add mechanic columns (only total, no completed/pending)
            foreach ($this->mechanics as $mechanic) {
                $mechanicName = $this->cleanName($mechanic->name);
                $this->headings[] = $mechanicName;
            }
            
            // Add total column at the end
            $this->headings[] = 'Total';
            
        } catch (\Exception $e) {
            Log::error('Error preparing headings: ' . $e->getMessage());
            $this->headings = ['Error preparing data'];
            $this->mechanics = collect();
        }
    }

    private function prepareFilterInfo()
    {
        $this->filterInfo = [];
        
        // Dealer filter
        if ($this->dealerId) {
            $dealer = \App\Models\Dealer::find($this->dealerId);
            $dealerName = $dealer ? $dealer->name : 'Unknown Dealer';
            $this->filterInfo[] = "Dealer: {$dealerName}";
        } else {
            // Check user access for "Semua Dealer"
            $user = auth()->user();
            if ($user && $user->role_id) {
                $role = \App\Models\Role::with('dealers')->find($user->role_id);
                if ($role) {
                    $technicianReportService = new \App\Services\TechnicianReportService();
                    if ($technicianReportService->isAdminRole($role)) {
                        $this->filterInfo[] = "Dealer: Semua Dealer (Admin)";
                    } else if ($role->dealers->count() > 0) {
                        $dealerNames = $role->dealers->pluck('name')->implode(', ');
                        $this->filterInfo[] = "Dealer: Semua Dealer (Pivot: {$dealerNames})";
                    } else {
                        $this->filterInfo[] = "Dealer: Semua Dealer";
                    }
                } else {
                    $this->filterInfo[] = "Dealer: Semua Dealer";
                }
            } else {
                $this->filterInfo[] = "Dealer: Semua Dealer";
            }
        }
        
        // Date range filter
        if ($this->startDate && $this->endDate) {
            $startDateFormatted = Carbon::parse($this->startDate)->format('d/m/Y');
            $endDateFormatted = Carbon::parse($this->endDate)->format('d/m/Y');
            $this->filterInfo[] = "Periode: {$startDateFormatted} - {$endDateFormatted}";
        } elseif ($this->startDate) {
            $startDateFormatted = Carbon::parse($this->startDate)->format('d/m/Y');
            $this->filterInfo[] = "Tanggal Mulai: {$startDateFormatted}";
        } elseif ($this->endDate) {
            $endDateFormatted = Carbon::parse($this->endDate)->format('d/m/Y');
            $this->filterInfo[] = "Tanggal Akhir: {$endDateFormatted}";
        } else {
            $this->filterInfo[] = "Periode: Semua Periode";
        }
        
        // Export date
        $exportDate = Carbon::now()->format('d/m/Y H:i:s');
        $this->filterInfo[] = "Tanggal Export: {$exportDate}";
    }

    /**
     * Clean name for Excel compatibility
     */
    private function cleanName($name)
    {
        // Remove special characters and limit length
        $cleaned = preg_replace('/[^a-zA-Z0-9\s]/', '', $name);
        $cleaned = trim($cleaned);
        
        // Limit to 31 characters (Excel sheet name limit)
        if (strlen($cleaned) > 31) {
            $cleaned = substr($cleaned, 0, 31);
        }
        
        return $cleaned ?: 'Unknown';
    }

    public function collection()
    {
        try {
            $reportData = $this->technicianReportService->getTechnicianReportData(
                $this->dealerId, 
                $this->startDate, 
                $this->endDate
            );
            $data = [];
            $no = 1;
            $columnTotals = [];
            foreach ($this->mechanics as $mechanic) {
                $columnTotals["mechanic_{$mechanic->id}_total"] = 0;
            }
            $columnTotals['row_total'] = 0;
            foreach ($reportData['data'] as $row) {
                $rowTotal = 0;
                $exportRow = [
                    $no++,
                    $row['work_name'],
                    $row['work_code'],
                    $row['category_name']
                ];
                foreach ($this->mechanics as $mechanic) {
                    $mechanicTotal = $row["mechanic_{$mechanic->id}_total"] ?? 0;
                    $exportRow[] = $mechanicTotal;
                    $rowTotal += $mechanicTotal;
                    $columnTotals["mechanic_{$mechanic->id}_total"] += $mechanicTotal;
                }
                $exportRow[] = $rowTotal;
                $columnTotals['row_total'] += $rowTotal;
                $data[] = $exportRow;
            }
            // Add total row
            $totalRow = ['', 'TOTAL', '', ''];
            foreach ($this->mechanics as $mechanic) {
                $totalRow[] = $columnTotals["mechanic_{$mechanic->id}_total"];
            }
            $totalRow[] = $columnTotals['row_total'];
            $data[] = $totalRow;
            return collect($data);
        } catch (\Exception $e) {
            Log::error('Error in collection: ' . $e->getMessage());
            return collect([['Error loading data']]);
        }
    }

    public function headings(): array
    {
        return $this->headings;
    }

    public function styles(Worksheet $sheet)
    {
        try {
            $lastColumn = $sheet->getHighestColumn();
            $lastRow = $sheet->getHighestRow();
            
            // Calculate positions
            $titleRow = 1;
            $headerRow = 1; // Headers are now in row 2
            $dataStartRow = 2; // Data starts in row 3
            
            // Calculate total row position (after data)
            $dataRows = count($this->technicianReportService->getTechnicianReportData($this->dealerId, $this->startDate, $this->endDate)['data']);
            $totalRow = $dataStartRow + $dataRows;
            $filterStartRow = $totalRow + 2; // After total row + empty row
            
            // Style the title row (row 1)
            $sheet->getStyle('A' . $titleRow . ':' . $lastColumn . $titleRow)->applyFromArray([
                'font' => [
                    'bold' => true,
                    'size' => 16,
                ],
                'alignment' => [
                    'horizontal' => Alignment::HORIZONTAL_CENTER,
                    'vertical' => Alignment::VERTICAL_CENTER,
                ],
            ]);
            
            // Header styling (row 2)
            $sheet->getStyle('A' . $headerRow . ':' . $lastColumn . $headerRow)->applyFromArray([
                'font' => [
                    'bold' => true,
                    'color' => ['rgb' => 'FFFFFF'],
                    'size' => 10,
                ],
                'fill' => [
                    'fillType' => Fill::FILL_SOLID,
                    'startColor' => ['rgb' => '2E5BBA'],
                ],
                'alignment' => [
                    'horizontal' => Alignment::HORIZONTAL_CENTER,
                    'vertical' => Alignment::VERTICAL_CENTER,
                ],
                'borders' => [
                    'allBorders' => [
                        'borderStyle' => Border::BORDER_THIN,
                        'color' => ['rgb' => '000000'],
                    ],
                ],
            ]);
            
            // Data styling (starting from row 3)
            if ($lastRow > $headerRow) {
                $dataEndRow = $totalRow;
                $sheet->getStyle('A' . $dataStartRow . ':' . $lastColumn . $dataEndRow)->applyFromArray([
                    'borders' => [
                        'allBorders' => [
                            'borderStyle' => Border::BORDER_THIN,
                            'color' => ['rgb' => '000000'],
                        ],
                    ],
                    'alignment' => [
                        'horizontal' => Alignment::HORIZONTAL_CENTER,
                        'vertical' => Alignment::VERTICAL_CENTER,
                    ],
                ]);
                
                // Left align text columns
                $sheet->getStyle('B' . $dataStartRow . ':D' . $dataEndRow)->getAlignment()->setHorizontal(Alignment::HORIZONTAL_LEFT);
                
                // Style the total row
                $sheet->getStyle('A' . $totalRow . ':' . $lastColumn . $totalRow)->applyFromArray([
                    'font' => [
                        'bold' => true,
                        'size' => 11,
                    ],
                    'fill' => [
                        'fillType' => Fill::FILL_SOLID,
                        'startColor' => ['rgb' => 'F2F2F2'],
                    ],
                    'borders' => [
                        'allBorders' => [
                            'borderStyle' => Border::BORDER_THIN,
                            'color' => ['rgb' => '000000'],
                        ],
                    ],
                ]);
            }
            
            // Style the export information section
            if ($filterStartRow <= $lastRow) {
                $exportInfoRow = $totalRow + 2; // After total row + empty row
                $filterEndRow = $lastRow;
                
                // Style the "INFORMASI EXPORT" title
                $sheet->getStyle('A' . $exportInfoRow . ':' . $lastColumn . $exportInfoRow)->applyFromArray([
                    'font' => [
                        'bold' => true,
                        'size' => 12,
                    ],
                    'fill' => [
                        'fillType' => Fill::FILL_SOLID,
                        'startColor' => ['rgb' => 'E6E6E6'],
                    ],
                    'alignment' => [
                        'horizontal' => Alignment::HORIZONTAL_LEFT,
                        'vertical' => Alignment::VERTICAL_CENTER,
                    ],
                ]);
                
                // Style the filter info rows
                $filterInfoStartRow = $exportInfoRow + 3; // After title + empty + "Filter yang Digunakan:"
                $sheet->getStyle('A' . $filterInfoStartRow . ':' . $lastColumn . $filterEndRow)->applyFromArray([
                    'font' => [
                        'size' => 10,
                    ],
                    'alignment' => [
                        'horizontal' => Alignment::HORIZONTAL_LEFT,
                        'vertical' => Alignment::VERTICAL_TOP,
                    ],
                ]);
            }
            
            // Auto-size columns
            foreach (range('A', $lastColumn) as $column) {
                if ($column === 'A') {
                    // Set specific width for column A (No) - don't auto-size
                    $sheet->getColumnDimension($column)->setWidth(5);
                } else {
                    $sheet->getColumnDimension($column)->setAutoSize(true);
                }
            }
            
        } catch (\Exception $e) {
            Log::error('Error applying styles: ' . $e->getMessage());
        }
    }

    public function columnWidths(): array
    {
        $widths = [
            'A' => 5,   // No - reduced from 8 to 5
            'B' => 30,  // Nama Pekerjaan
            'C' => 15,  // Kode Pekerjaan
            'D' => 20,  // Kategori
        ];
        
        // Add widths for mechanic columns
        $currentColumn = 'E';
        foreach ($this->mechanics as $mechanic) {
            $widths[$currentColumn++] = 15; // Mechanic total
        }
        
        // Add width for total column
        $widths[$currentColumn] = 15; // Total
        
        return $widths;
    }

    public function registerEvents(): array
    {
        return [
            AfterSheet::class => function(AfterSheet $event) {
                $sheet = $event->sheet->getDelegate();
                $highestColumn = $sheet->getHighestColumn();
                $highestRow = $sheet->getHighestRow();
                // Header styling ONLY for row 1
                $sheet->getStyle('A1:' . $highestColumn . '1')->applyFromArray([
                    'font' => [
                        'bold' => true,
                        'color' => ['rgb' => 'FFFFFF'],
                        'size' => 10,
                    ],
                    'fill' => [
                        'fillType' => Fill::FILL_SOLID,
                        'startColor' => ['rgb' => '2E5BBA'],
                    ],
                    'alignment' => [
                        'horizontal' => Alignment::HORIZONTAL_CENTER,
                        'vertical' => Alignment::VERTICAL_CENTER,
                    ],
                    'borders' => [
                        'allBorders' => [
                            'borderStyle' => Border::BORDER_THIN,
                            'color' => ['rgb' => '000000'],
                        ],
                    ],
                ]);
                // Total row styling (only last row)
                $sheet->getStyle('A' . $highestRow . ':' . $highestColumn . $highestRow)->applyFromArray([
                    'font' => [
                        'bold' => true,
                        'size' => 11,
                    ],
                    'fill' => [
                        'fillType' => Fill::FILL_SOLID,
                        'startColor' => ['rgb' => 'F2F2F2'],
                    ],
                    'borders' => [
                        'allBorders' => [
                            'borderStyle' => Border::BORDER_THIN,
                            'color' => ['rgb' => '000000'],
                        ],
                    ],
                ]);
                // Export info below table
                $infoStartRow = $highestRow + 2;
                $sheet->setCellValue('A' . $infoStartRow, 'INFORMASI EXPORT');
                $sheet->getStyle('A' . $infoStartRow . ':' . $highestColumn . $infoStartRow)->applyFromArray([
                    'font' => [
                        'bold' => true,
                        'size' => 12,
                    ],
                    'fill' => [
                        'fillType' => Fill::FILL_SOLID,
                        'startColor' => ['rgb' => 'E6E6E6'],
                    ],
                    'alignment' => [
                        'horizontal' => Alignment::HORIZONTAL_LEFT,
                        'vertical' => Alignment::VERTICAL_CENTER,
                    ],
                ]);
                $sheet->setCellValue('A' . ($infoStartRow + 2), 'Filter yang Digunakan:');
                $row = $infoStartRow + 3;
                foreach ($this->filterInfo as $info) {
                    $sheet->setCellValue('A' . $row, $info);
                    $row++;
                }
                $sheet->getStyle('A' . ($infoStartRow + 2) . ':A' . ($row-1))->applyFromArray([
                    'font' => [ 'size' => 10 ],
                    'alignment' => [
                        'horizontal' => Alignment::HORIZONTAL_LEFT,
                        'vertical' => Alignment::VERTICAL_TOP,
                    ],
                ]);
            }
        ];
    }
}