<?php

namespace App\Helpers;

use App\Http\Controllers\ComisionesController;
use Illuminate\Support\Facades\File;
use Illuminate\Support\Facades\Log;
use Iterator;
use League\Csv\CannotInsertRecord;
use League\Csv\Exception;
use League\Csv\InvalidArgument;
use League\Csv\Reader;
use League\Csv\Writer;

class CsvHelper
{

    /**
     * @throws Exception
     */
    public static function getRecords($filePath, $message): Iterator {
        try {
            $csv = self::getReader($filePath);
            return $csv->getRecords();
        } catch (InvalidArgument|Exception $e) {
            Log::error($e->getMessage());
            throw new Exception($message, $e);
        }
    }

    /**
     * @throws Exception
     */
    public static function cambiarParametro(string $id, string $valor): void
    {
        try {
            $updated = false;
            $filePath = resource_path(ComisionesController::PARAMETROS_PATH);
            $csv = self::getReader($filePath);
            $headers = $csv->getHeader();
            $records = array_map(fn($r) => (array) $r, iterator_to_array($csv->getRecords()));

            foreach ($records as &$record) {
                if ($record['id'] === $id) {
                    $record['valor'] = $valor;
                    $updated = true;
                    break;
                }
            }
            unset($record);

            if (!$updated)
                throw new Exception("Parametro '{$id}' no encontrado.");

            self::generarCsv($filePath, $records, $headers, "|", "'", false);
        } catch (CannotInsertRecord | InvalidArgument $e) {
            Log::error("Error al actualizar csv: " . $e->getMessage());
            throw new Exception("Error al actualizar csv", $e);
        }
    }

    /**
     * @throws InvalidArgument
     * @throws CannotInsertRecord
     */
    public static function generarCsv($filePath, $contenido, $headers = null, $delimiter = null, $enclosure = null, $export = true): void
    {
        $path = $filePath;

        if ($export) {
            if (!File::exists(storage_path('csv/exports')))
                File::makeDirectory(storage_path('csv/exports'), 0755, true);
            $path = storage_path($filePath);
        }

        $writer = Writer::createFromPath($path, 'w');
        if ($delimiter)
            $writer->setDelimiter($delimiter);
        if ($enclosure)
            $writer->setEnclosure($enclosure);
        if ($headers)
            $writer->insertOne($headers);

        $writer->insertAll($contenido);
    }

    /**
     * @param string $filePath
     * @return Reader
     * @throws InvalidArgument
     * @throws Exception
     */
    private static function getReader(string $filePath): Reader
    {
        $csv = Reader::createFromPath($filePath);
        $csv->setDelimiter("|");
        $csv->setEnclosure("'");
        $csv->setHeaderOffset(0);
        return $csv;
    }
}