<?php

namespace App\Repositories;

use App\Models\Transaksi;
use App\Helpers\LaporanHelper;
use Carbon\Carbon;
use Carbon\CarbonPeriod;
use Illuminate\Support\Collection;
use Illuminate\Pagination\LengthAwarePaginator;

class TransaksiRepository
{
    private const DAILY_PER_PAGE = 7;
    private const MONTHLY_PER_PAGE = 12;
    private const PAGINATION_DAYS_LIMIT = 365;

    private LaporanHelper $helper;

    public function __construct(LaporanHelper $helper)
    {
        $this->helper = $helper;
    }

    public function processLaporanHarian(Collection $allSalesNames, int $page = 1, bool $limitPagination = true)
    {
        $perPage = self::DAILY_PER_PAGE;

        if ($limitPagination) {
            $endDate = Carbon::today()->subDays(($page - 1) * $perPage);
            $startDate = $endDate->copy()->subDays($perPage - 1);
            $totalHariUntukPaginasi = self::PAGINATION_DAYS_LIMIT;
        } else {
            $endDate = Carbon::today();
            $startDate = $endDate->copy()->subYear()->addDay();
            $totalHariUntukPaginasi = $endDate->diffInDays($startDate) + 1;
        }

        $transaksis = Transaksi::with(['itemTransaksi.item.produk'])
            ->whereBetween('created_at', [$startDate->startOfDay(), $endDate->endOfDay()])
            ->orderBy('created_at', 'desc')
            ->get();

        $transaksisByDay = $transaksis->groupBy(function ($transaksi) {
            return Carbon::parse($transaksi->created_at)->format('Y-m-d');
        });

        $period = CarbonPeriod::create($startDate, $endDate);
        $laporan = [];

        foreach ($period as $date) {
            $dateString = $date->format('Y-m-d');
            $tanggalFormatted = $date->isoFormat('dddd, D MMMM Y');

            if (isset($transaksisByDay[$dateString])) {
                $transaksisPerTanggal = $transaksisByDay[$dateString];
                $salesDataTransaksi = $transaksisPerTanggal->groupBy('nama_sales')
                    ->map(fn($transaksisPerSales) => $this->helper->hitungDataSales($transaksisPerSales));

                $fullSalesData = $allSalesNames->map(function ($namaSales) use ($salesDataTransaksi) {
                    return $salesDataTransaksi->get($namaSales) ?? $this->helper->defaultSalesData($namaSales);
                });

                $totalItem = $fullSalesData->sum('item_terjual');
                $totalBerat = $fullSalesData->sum('berat_terjual_raw');
                $totalPendapatan = $fullSalesData->sum('pendapatan_raw');

                $laporan[$dateString] = [
                    'tanggal' => $tanggalFormatted,
                    'total_item_terjual' => $totalItem > 0 ? $totalItem : LaporanHelper::DEFAULT_DISPLAY,
                    'total_berat' => $totalBerat > 0 ? $this->helper->formatWeight($totalBerat) : LaporanHelper::DEFAULT_DISPLAY,
                    'total_pendapatan' => $totalPendapatan > 0 ? $this->helper->formatCurrency($totalPendapatan) : LaporanHelper::DEFAULT_DISPLAY,
                    'sales' => $this->helper->formatSalesDataValues($fullSalesData)->values(),
                ];
            } else {
                $laporan[$dateString] = [
                    'tanggal' => $tanggalFormatted,
                    'total_item_terjual' => LaporanHelper::DEFAULT_DISPLAY,
                    'total_berat' => LaporanHelper::DEFAULT_DISPLAY,
                    'total_pendapatan' => LaporanHelper::DEFAULT_DISPLAY,
                    'sales' => [],
                ];
            }
        }

        if ($limitPagination) {
            return new LengthAwarePaginator(
                array_reverse(array_values($laporan)),
                $totalHariUntukPaginasi,
                $perPage,
                $page,
                ['path' => request()->url(), 'query' => request()->query()]
            );
        }

        return collect(array_reverse(array_values($laporan)));
    }

    public function processLaporanBulanan(Collection $allSalesNames, int $page = 1, bool $limitPagination = true)
    {
        $perPage = self::MONTHLY_PER_PAGE;

        $transaksis = Transaksi::with(['itemTransaksi.item.produk'])
            ->orderBy('created_at', 'desc')
            ->get();

        $laporan = $transaksis->groupBy(function ($transaksi) {
            return Carbon::parse($transaksi->created_at)->format('F Y');
        })->map(function ($transaksisPerTanggal, $tanggal) use ($allSalesNames) {
            $salesDataTransaksi = $transaksisPerTanggal
                ->groupBy('nama_sales')
                ->map(fn($transaksisPerSales) => $this->helper->hitungDataSales($transaksisPerSales));

            $fullSalesData = $allSalesNames->map(function ($namaSales) use ($salesDataTransaksi) {
                return $salesDataTransaksi->get($namaSales) ?? $this->helper->defaultSalesData($namaSales);
            });

            $totalItem = $fullSalesData->sum('item_terjual');
            $totalBerat = $fullSalesData->sum('berat_terjual_raw');
            $totalPendapatan = $fullSalesData->sum('pendapatan_raw');

            return [
                'tanggal' => $tanggal,
                'total_item_terjual' => $totalItem > 0 ? $totalItem : LaporanHelper::DEFAULT_DISPLAY,
                'total_berat' => $totalBerat > 0 ? $this->helper->formatWeight($totalBerat) : LaporanHelper::DEFAULT_DISPLAY,
                'total_pendapatan' => $totalPendapatan > 0 ? $this->helper->formatCurrency($totalPendapatan) : LaporanHelper::DEFAULT_DISPLAY,
                'sales' => $this->helper->formatSalesDataValues($fullSalesData)->values(),
            ];
        });

        if ($limitPagination) {
            return new LengthAwarePaginator(
                $laporan->forPage($page, $perPage)->values(),
                $laporan->count(),
                $perPage,
                $page,
                ['path' => request()->url(), 'query' => request()->query()]
            );
        }

        return $laporan->values();
    }
}