<?php

namespace App\Http\Controllers;

use App\GrupoDeCompra;
use App\Helpers\CanastaHelper;
use App\Helpers\CsvHelper;
use App\Helpers\PedidosExportHelper;
use App\Helpers\TransporteHelper;
use App\Http\Resources\GrupoDeCompraResource;
use App\Producto;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use League\Csv\Exception;
use Mpdf\MpdfException;
use Symfony\Component\HttpFoundation\BinaryFileResponse;

class ComisionesController
{
    const PARAMETROS_PATH = 'csv/parametros.csv';
    const CANASTAS_PATH = 'csv/canastas/';
    const BARRIO = "Barrio";
    const SALDO = "Saldo";

    public function show()
    {
        return view('auth/login');
    }

    public function descargarPedidos()
    {
        try {
            PedidosExportHelper::pedidosBarriales();
        } catch (Exception $e) {
            return response()->json(['message' => $e->getMessage()], 500);
        }
        $pattern = storage_path('csv/exports/pedidos-por-barrio-*.csv');
        $files = glob($pattern);

        usort($files, function ($a, $b) {
            return filemtime($b) <=> filemtime($a);
        });

        return response()->download($files[0]);
    }

    public function descargarPedidosDeOllas()
    {
        try {
            PedidosExportHelper::pedidosDeOllas();
        } catch (Exception $e) {
            return response()->json(['message' => $e->getMessage()], 500);
        }
        $pattern = storage_path('csv/exports/pedidos-de-ollas-*.csv');
        $files = glob($pattern);

        usort($files, function ($a, $b) {
            return filemtime($b) <=> filemtime($a);
        });

        return response()->download($files[0]);
    }

    public function descargarNotas(): BinaryFileResponse
    {
        Producto::planillaNotas();
        $pattern = storage_path('csv/exports/notas-por-barrio-*.csv');
        $files = glob($pattern);

        usort($files, function ($a, $b) {
            return filemtime($b) <=> filemtime($a);
        });

        return response()->download($files[0]);
    }

    public function pdf() {
        try {
            GrupoDeCompra::exportarPedidosBarrialesAPdf();
            return response();
        } catch (MpdfException $e) {
            return response()->json(['message' => $e->getMessage()], 500);
        }
    }

    public function cargarCanasta(Request $request): JsonResponse
    {
        $request->validate([
            'data' => 'required|file|mimes:csv,txt|max:2048',
        ]);

        $nombre = CanastaHelper::guardarCanasta($request->file('data'), self::CANASTAS_PATH);
        try {
            CanastaHelper::cargarCanasta(storage_path(self::CANASTAS_PATH . $nombre));
        } catch (Exception $e) {
            return response()->json(['message' => $e->getMessage()], 500);
        }

        return response()->json([
            'message' => 'Canasta cargada exitosamente',
        ]);
    }

    public function descargarCanastaEjemplo(): BinaryFileResponse
    {
        $file = resource_path('csv/productos.csv');
        return response()->download($file);
    }

    public function cargarSaldos(Request $request): JsonResponse
    {
        $request->validate([
            'data' => 'required|file|mimes:csv,txt|max:2048',
        ]);

        $file = $request->file('data')->getPathname();

        try {
            $records = CsvHelper::getRecords($file, "No se pudo leer el archivo.");
        } catch (Exception $e) {
            return response()->json(['message' => $e->getMessage()], 500);
        }

        foreach ($records as $record) {
            $barrio = $record[self::BARRIO];
            $saldo = $record[self::SALDO];
            GrupoDeCompra::where('nombre', $barrio)
                ->update(['saldo' => $saldo]);
        }

        return response()->json(GrupoDeCompraResource::collection(GrupoDeCompra::all()));
    }

    public function obtenerParametros(): JsonResponse
    {
        try {
            $records = self::parametrosRecords();
            $result = [];
            foreach ($records as $record)
                $result[] = $record;
            return response()->json($result);
        } catch (Exception $e) {
            return response()->json(['message' => $e->getMessage()], 500);
        }
    }

    public function modificarParametros(string $parametro_id, Request $request) {
        try {
            if (collect(self::parametrosRecords())
                ->contains('id', $parametro_id)) {
                $valid = $request->validate([
                    'valor' => ['required', 'numeric', 'gte:0'],
                ]);
                CsvHelper::cambiarParametro($parametro_id, $valid['valor']);
                TransporteHelper::resetParametros();
                return response()->noContent();
            }
            return response()->json(['message' => 'Parametro no encontrado.'], 404);
        } catch (Exception $e) {
            return response()->json(['message' => $e->getMessage()], 500);
        }
    }

    /**
     * @throws Exception
     */
    private static function parametrosRecords(): array
    {
        $records = CsvHelper::getRecords(resource_path(self::PARAMETROS_PATH), "No se pudo leer el archivo.");
        return iterator_to_array($records);
    }
}