<?php

namespace App\Models;

use App\User;
use Carbon\Carbon;
use Cviebrock\EloquentSluggable\Sluggable;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\SoftDeletes;

/**
 * Class Incentive
 *
 * @property int $id
 * @property string $name
 * @property array|null $trans_name
 * @property string|null $subtitle
 * @property array|null $trans_subtitle
 * @property string $slug
 * @property string|null $description
 * @property array|null $trans_description
 * @property string|null $image
 * @property string|null $terms
 * @property array|null $trans_terms
 * @property Carbon $qualification_start
 * @property Carbon $qualification_end
 * @property Carbon $calculation_end
 * @property int $points_partner_onetime
 * @property int $points_abo_onetime
 * @property int $min_direct_partners
 * @property int $min_customer_abos
 * @property int $max_winners
 * @property float|null $amount_per_partner
 * @property float|null $bonus_rank_1
 * @property float|null $bonus_rank_2
 * @property float|null $bonus_rank_3
 * @property bool $include_sales_points
 * @property int $status
 * @property bool $vip_only
 * @property Carbon|null $created_at
 * @property Carbon|null $updated_at
 * @property Carbon|null $deleted_at
 * @property-read Collection<int, IncentiveParticipant> $participants
 *
 * @method static \Illuminate\Database\Eloquent\Builder|Incentive newModelQuery()
 * @method static \Illuminate\Database\Eloquent\Builder|Incentive newQuery()
 * @method static \Illuminate\Database\Eloquent\Builder|Incentive query()
 *
 * @mixin \Eloquent
 */
class Incentive extends Model
{
    use HasFactory, Sluggable, SoftDeletes;

    protected $table = 'incentives';

    protected $casts = [
        'trans_name' => 'array',
        'trans_subtitle' => 'array',
        'trans_description' => 'array',
        'trans_terms' => 'array',
        'points_partner_onetime' => 'int',
        'points_abo_onetime' => 'int',
        'min_direct_partners' => 'int',
        'min_customer_abos' => 'int',
        'max_winners' => 'int',
        'amount_per_partner' => 'float',
        'bonus_rank_1' => 'float',
        'bonus_rank_2' => 'float',
        'bonus_rank_3' => 'float',
        'include_sales_points' => 'bool',
        'include_abos' => 'bool',
        'status' => 'int',
        'vip_only' => 'bool',
        'qualification_start' => 'date',
        'qualification_end' => 'date',
        'calculation_end' => 'date',
    ];

    protected $fillable = [
        'name',
        'trans_name',
        'subtitle',
        'trans_subtitle',
        'description',
        'trans_description',
        'image',
        'terms',
        'trans_terms',
        'qualification_start',
        'qualification_end',
        'calculation_end',
        'points_partner_onetime',
        'points_abo_onetime',
        'min_direct_partners',
        'min_customer_abos',
        'max_winners',
        'amount_per_partner',
        'bonus_rank_1',
        'bonus_rank_2',
        'bonus_rank_3',
        'include_sales_points',
        'include_abos',
        'status',
        'vip_only',
    ];

    /**
     * Anzahl der Plaetze, fuer die ein Rang-Bonus hinterlegt werden kann.
     */
    public const RANK_BONUS_SLOTS = 3;

    public static $statusTypes = [
        0 => 'draft',
        1 => 'active',
        2 => 'closed',
    ];

    public static $statusColors = [
        0 => 'warning',
        1 => 'success',
        2 => 'secondary',
    ];

    public function sluggable(): array
    {
        return [
            'slug' => [
                'source' => 'name',
            ],
        ];
    }

    // Relationships

    public function participants()
    {
        return $this->hasMany(IncentiveParticipant::class);
    }

    // Scopes

    public function scopeActive($query)
    {
        return $query->where('status', 1);
    }

    /**
     * Incentives, die dieser Berater sehen darf: VIP sieht alles, andere nur ohne VIP-Sperre.
     */
    public function scopeVisibleFor($query, ?User $user)
    {
        if ($user?->isVIP()) {
            return $query;
        }

        return $query->where('vip_only', false);
    }

    /**
     * Incentives, bei denen Umsatzpunkte der Neupartner/Neuabos mitzaehlen.
     */
    public function scopeIncludingSalesPoints($query)
    {
        return $query->where('include_sales_points', true);
    }

    public function scopeInQualificationPeriod($query, ?Carbon $date = null)
    {
        $date = $date ?: Carbon::now();

        return $query->where('qualification_start', '<=', $date)
            ->where('qualification_end', '>=', $date);
    }

    public function scopeInCalculationPeriod($query, ?Carbon $date = null)
    {
        $date = $date ?: Carbon::now();

        return $query->where('qualification_start', '<=', $date)
            ->where('calculation_end', '>=', $date);
    }

    /**
     * Incentives, deren Qualifikationsfenster das Datum enthaelt (Datumsvergleich auf Tagesebene,
     * damit auch Zeitstempel am letzten Fenstertag zaehlen).
     */
    public function scopeQualificationWindowContains($query, Carbon $date)
    {
        return $query->whereDate('qualification_start', '<=', $date)
            ->whereDate('qualification_end', '>=', $date);
    }

    // Helpers

    /**
     * Aktive Incentives fuer Sidenav und Dashboard: mehrere koennen parallel laufen
     * (z. B. Montenegro bis Oktober, Recruiting-Challenge ab Oktober), aelteste zuerst.
     *
     * @return Collection<int, Incentive>
     */
    public static function activeForNavigation(?User $user = null): Collection
    {
        return static::active()
            ->visibleFor($user)
            ->orderBy('qualification_start')
            ->orderBy('id')
            ->get();
    }

    /**
     * Ordner der Bilder dieses Incentives (relativ zu public/): img/incentive/<slug>.
     */
    public function imageDirectory(): string
    {
        return 'img/incentive/'.$this->slug;
    }

    /**
     * Pfad des Titelbilds relativ zu public/, bevorzugt aus dem eigenen Ordner,
     * sonst aus dem Hauptordner (Altbestand). NULL ohne Titelbild.
     */
    public function heroImagePath(): ?string
    {
        if (! $this->image) {
            return null;
        }

        $own = $this->imageDirectory().'/'.$this->image;
        if (is_file(public_path($own))) {
            return $own;
        }

        return 'img/incentive/'.$this->image;
    }

    /**
     * Galerie-Bilder nur aus dem eigenen Ordner, ohne Titelbild, sortiert.
     * Der Hauptordner zaehlt bewusst nicht mehr, damit Bilder eines anderen
     * Incentives nicht unter diesem erscheinen.
     *
     * @return list<string>
     */
    public function galleryImages(): array
    {
        $dir = public_path($this->imageDirectory());
        if (! is_dir($dir)) {
            return [];
        }

        $files = glob($dir.'/*.{jpg,jpeg,png,webp}', GLOB_BRACE) ?: [];
        $images = [];
        foreach ($files as $file) {
            $basename = basename($file);
            if ($basename === $this->image) {
                continue;
            }
            $images[] = $this->imageDirectory().'/'.$basename;
        }
        sort($images);

        return $images;
    }

    /**
     * Darf dieser Berater das Incentive sehen (Teaser, Rangliste, Details, Teilnahme)?
     */
    public function isVisibleFor(?User $user): bool
    {
        return ! $this->vip_only || (bool) $user?->isVIP();
    }

    public function isActive(): bool
    {
        return $this->status === 1;
    }

    public function isDraft(): bool
    {
        return $this->status === 0;
    }

    public function isClosed(): bool
    {
        return $this->status === 2;
    }

    public function isInQualificationPeriod(?Carbon $date = null): bool
    {
        $date = $date ?: Carbon::now();

        return $date->between($this->qualification_start, $this->qualification_end);
    }

    public function isInCalculationPeriod(?Carbon $date = null): bool
    {
        $date = $date ?: Carbon::now();

        return $date->between($this->qualification_start, $this->calculation_end);
    }

    public function isDateInScope(int $month, int $year): bool
    {
        $date = Carbon::createFromDate($year, $month, 1);

        return $date->between(
            $this->qualification_start->copy()->startOfMonth(),
            $this->calculation_end->copy()->endOfMonth()
        );
    }

    public function getStatusType(): string
    {
        return isset(self::$statusTypes[$this->status]) ? __('incentive.status_'.self::$statusTypes[$this->status]) : '';
    }

    public function getStatusColor(): string
    {
        return self::$statusColors[$this->status] ?? 'default';
    }

    /**
     * Wird eine Geldpraemie je Neupartner ausgezahlt (Recruiting-Challenge)?
     */
    public function hasCashPayout(): bool
    {
        return (float) $this->amount_per_partner > 0 || $this->rankBonuses() !== [];
    }

    /**
     * Rang-Boni je Platz (nur gesetzte Betraege > 0, Platz => Betrag).
     *
     * @return array<int, float>
     */
    public function rankBonuses(): array
    {
        $bonuses = [];
        for ($rank = 1; $rank <= self::RANK_BONUS_SLOTS; $rank++) {
            $amount = (float) $this->{'bonus_rank_'.$rank};
            if ($amount > 0) {
                $bonuses[$rank] = $amount;
            }
        }

        return $bonuses;
    }

    /**
     * Rang-Bonus fuer einen Platz, 0 wenn keiner hinterlegt oder der Platz ausserhalb der Gewinnerplaetze liegt.
     */
    public function rankBonus(?int $rank): float
    {
        if ($rank === null || $rank < 1 || $rank > $this->max_winners) {
            return 0.0;
        }

        return $this->rankBonuses()[$rank] ?? 0.0;
    }

    /**
     * Zaehlen Umsatzpunkte der Neupartner/Neuabos mit? Aus = Wertung nur nach Einmalpunkten.
     */
    public function includesSalesPoints(): bool
    {
        return $this->include_sales_points === null || (bool) $this->include_sales_points;
    }

    /**
     * Werden Abos ueberhaupt erfasst? Aus = reine Recruiting-Challenge, weder Kunden-
     * noch Eigenabos landen im Tracking.
     */
    public function includesAbos(): bool
    {
        return $this->include_abos === null || (bool) $this->include_abos;
    }

    /**
     * Gibt es eine Mindestqualifikation (direkte Partner oder Kundenabos)?
     */
    public function hasMinimumRequirements(): bool
    {
        return $this->min_direct_partners > 0 || $this->min_customer_abos > 0;
    }

    /**
     * Spielen Abos in diesem Incentive eine Rolle (Punkte oder Mindestanzahl)?
     */
    public function usesAbos(): bool
    {
        return $this->includesAbos() && ($this->points_abo_onetime > 0 || $this->min_customer_abos > 0);
    }

    /**
     * Rangliste nach Anzahl Neupartner: Einmalpunkte je Partner, keine Abo- und Umsatzpunkte.
     */
    public function ranksByPartnerCount(): bool
    {
        return ! $this->includesSalesPoints() && ! $this->usesAbos() && $this->points_partner_onetime > 0;
    }

    /**
     * Rangliste nach Umsatzpunkten der Neupartner: keine Einmal- und keine Abopunkte
     * (Recruiting-Challenge ab 08.10.2026, Berechnung wie Montenegro).
     */
    public function ranksBySalesOfNewPartners(): bool
    {
        return $this->includesSalesPoints() && ! $this->usesAbos() && $this->points_partner_onetime <= 0;
    }

    /**
     * Darstellung als Challenge mit Geldpraemie (Praemie je Neupartner, Top-Bonus) statt Punktesystem.
     */
    public function isCashChallenge(): bool
    {
        return $this->hasCashPayout() && ($this->ranksByPartnerCount() || $this->ranksBySalesOfNewPartners());
    }

    /**
     * Get specific translation for a field and locale.
     */
    public function getTrans(string $key, string $lang): string
    {
        $transKey = 'trans_'.$key;
        if (! empty($this->{$transKey}[$lang])) {
            return $this->{$transKey}[$lang];
        }

        return '';
    }

    /**
     * Get translated value for the current locale, falling back to German (default).
     */
    public function getLang(string $key): string
    {
        $lang = \App::getLocale();
        if ($lang === 'de') {
            return (string) ($this->{$key} ?? '');
        }
        $trans = $this->getTrans($key, $lang);
        if ($trans !== '') {
            return $trans;
        }

        return (string) ($this->{$key} ?? '');
    }

    /**
     * Qualifikationsfenster als Zeitstempel-Paar: [Start 00:00:00, Ende 23:59:59].
     * Zentrale Fensterberechnung, damit Bestellungen am letzten Fenstertag ueberall zaehlen.
     *
     * @return array{0: Carbon, 1: Carbon}
     */
    public function qualificationWindow(): array
    {
        return [
            $this->qualification_start->copy()->startOfDay(),
            $this->qualification_end->copy()->endOfDay(),
        ];
    }

    /**
     * Liegt der Zeitstempel im Qualifikationsfenster (inkl. des kompletten letzten Tages)?
     */
    public function qualificationWindowContains(Carbon $date): bool
    {
        [$windowStart, $windowEnd] = $this->qualificationWindow();

        return $date->between($windowStart, $windowEnd);
    }

    /**
     * @return array<int, array{month: int, year: int}>
     */
    public function getCalculationMonths(): array
    {
        $months = [];
        $current = $this->qualification_start->copy()->startOfMonth();
        $end = $this->calculation_end->copy()->startOfMonth();

        while ($current->lte($end)) {
            $months[] = [
                'month' => $current->month,
                'year' => $current->year,
            ];
            $current->addMonth();
        }

        return $months;
    }
}