<?php

namespace App\Http\Controllers\Bo;

use App\Http\Controllers\Controller;
use App\Models\Participation;
use App\Models\Settings;
use Carbon\Carbon;
use Illuminate\Support\Facades\DB;

class DashboardController extends Controller
{
    /**
     * Dashboard Page
     *
     * @return \Illuminate\Contracts\View\View
     */
    public function index(): \Illuminate\Contracts\View\View
    {
        // FIXME: refactor and simply this
        // * Pour les stats.
        $settings                   = app(Settings::class);
        $participations             = Participation::query()->selectRaw("COUNT(*) AS count, DATE(created_at) AS date")
            ->groupByRaw("DATE(created_at)")->get();
        $participationsUniquePerDay = Participation::query()->selectRaw(
            "DISTINCT customer_id  AS user, COUNT(*) AS count, DATE(created_at) AS date"
        )->groupByRaw("DATE(created_at), user")->get();
        $statsUnique                = [];
        foreach ($participationsUniquePerDay as $participationPerDay) {
            $dateUnique               = Carbon::parse($participationPerDay->date)->format('d/m/Y');
            $statsUnique[$dateUnique] = isset($statsUnique[$dateUnique]) ? $statsUnique[$dateUnique] + 1 : 1;
        }
        $participationsUnique = Participation::query()->selectRaw("DISTINCT customer_id  AS user, COUNT(*) AS count")
            ->groupBy("user")->orderBy("user")->get();

        // * Données calculées à afficher.
        $totalParticipation = Participation::query()->count();
        if (count($participationsUnique) > 0) {
            $avgParticipUser = round($totalParticipation / count($participationsUnique), 1);
        } else {
            $avgParticipUser = 0;
        }

        // * Tableau des dates comprises dans la table participation.
        foreach ($participations as $participation) {
            $datesParticipations[Carbon::parse($participation->date)->format('d/m/Y')] = $participation->count;
        }

        // * Création des tableaux avec toutes les dates depuis le début du jeu et le nombre de participations associées.
        $date    = $settings->start_date;
        $dateFin = now()->lt($settings->end_date) ? now() : $settings->end_date;

        // Récupération des 3 codes EAN les plus utilisés.
        $codesEan = Participation::query()->select(
            DB::raw('COUNT(product_id) AS nb_usage, product_id')
        )->groupBy('product_id')->orderByDesc('nb_usage')->limit(3)->get();


        // TODO : Carbon Interval.
        // * Génération des tableaux de date depuis le début du jeu.
        $dates       = [];
        $count       = [];
        $countUnique = [];
        while ($dateFin > $date) {
            $dates[]       = $date->format('d/m/Y');
            $count[]       = isset($datesParticipations[$date->format('d/m/Y')]) ?
                $datesParticipations[$date->format('d/m/Y')] : 0;
            $countUnique[] = isset($statsUnique[$date->format('d/m/Y')]) ? $statsUnique[$date->format('d/m/Y')] : 0;
            $date->addDay();
        }

        return view('back::pages.dashboard.index', compact(
            'dates',
            'count',
            'countUnique',
            'totalParticipation',
            'avgParticipUser',
            'codesEan',
            'settings'
        ));
    }
}