<?php

namespace App\Exports\Reports;

use Illuminate\Support\Collection;
use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\WithHeadings;
use Maatwebsite\Excel\Concerns\WithMapping;

/**
 * Generic row/field-selection export used by all report export types
 * (clients, domains, invoices, services, transactions). Rows are already
 * resolved to associative arrays by ExportController::rowValues() — this
 * class only handles field selection + CSV/XLSX writing.
 */
class ReportRowsExport implements FromCollection, WithHeadings, WithMapping
{
    public function __construct(
        private readonly Collection $rows,
        private readonly array $fields,
        private readonly array $labels
    ) {}

    public function collection(): Collection
    {
        return $this->rows;
    }

    public function headings(): array
    {
        return array_map(fn ($field) => $this->labels[$field] ?? $field, $this->fields);
    }

    public function map($row): array
    {
        return array_map(fn ($field) => $row[$field] ?? '', $this->fields);
    }
}