<?php

namespace App\Services\Customer;

use App\Enums\Tier;
use App\Models\Plan;
use App\Models\User;

/**
 * Read-only Statusüberblick für das immer verfügbare Buchungs-Widget im
 * Header (aktuelle Buchung, verbleibendes PM-Kontingent, Credit-Guthaben).
 *
 * Single Source of Truth für die Gating-Logik bleibt das User-Modell; dieses
 * DTO bündelt nur die fürs UI nötigen Werte, damit die Blade-Komponente keine
 * eigene Geschäftslogik trägt.
 */
class CustomerStatusSummary
{
    public function __construct(
        public readonly Tier $tier,
        public readonly ?string $planName,
        public readonly ?string $billingInterval,
        public readonly bool $hasActiveBooking,
        public readonly bool $hasSubscription,
        public readonly bool $hasGrandfathered,
        public readonly int $openSinglePurchases,
        public readonly bool $unlimitedQuota,
        public readonly ?int $quotaTotal,
        public readonly ?int $quotaRemaining,
        public readonly int $creditBalance,
    ) {}

    public static function fromUser(User $user): self
    {
        $plan = $user->currentPlan();
        $subscription = $user->subscription();
        $hasSubscription = (bool) $subscription?->valid();

        $billingInterval = null;
        if ($plan instanceof Plan && $subscription?->stripe_price) {
            $billingInterval = $subscription->stripe_price === $plan->stripe_price_id_yearly
                ? 'yearly'
                : 'monthly';
        }

        $hasGrandfathered = $user->userPaymentOptions()
            ->grandfatheredNow()
            ->exists();

        return new self(
            tier: $user->currentTier(),
            planName: $plan?->name,
            billingInterval: $billingInterval,
            hasActiveBooking: $user->hasActiveBooking(),
            hasSubscription: $hasSubscription,
            hasGrandfathered: $hasGrandfathered,
            openSinglePurchases: $user->singlePurchases()->grantingSubmission()->count(),
            unlimitedQuota: $user->hasUnlimitedPressReleaseQuota(),
            quotaTotal: $user->pressReleaseQuotaTotal(),
            quotaRemaining: $user->pressReleaseQuotaRemaining(),
            creditBalance: $user->creditBalance(),
        );
    }

    public function hasCredits(): bool
    {
        return $this->creditBalance > 0;
    }

    /**
     * Menschlich lesbares Etikett der aktuellen Buchung.
     */
    public function bookingLabel(): string
    {
        if ($this->planName !== null) {
            return $this->planName;
        }

        if ($this->hasGrandfathered) {
            return __('Bestandstarif');
        }

        if ($this->openSinglePurchases > 0) {
            return trans_choice(
                '{1}:count Einzelbuchung|[2,*]:count Einzelbuchungen',
                $this->openSinglePurchases,
                ['count' => $this->openSinglePurchases],
            );
        }

        return __('Kein Abo');
    }

    public function billingIntervalLabel(): ?string
    {
        return match ($this->billingInterval) {
            'monthly' => __('monatlich'),
            'yearly' => __('jährlich'),
            default => null,
        };
    }

    /**
     * Kompakter Text für das Trigger-Badge in der Topbar.
     */
    public function badgeLabel(): string
    {
        $parts = [];

        $parts[] = $this->unlimitedQuota
            ? __(':icon PM', ['icon' => '∞'])
            : trans_choice('{0}:count PM|{1}:count PM|[2,*]:count PM', (int) $this->quotaRemaining, ['count' => (int) $this->quotaRemaining]);

        if ($this->hasCredits()) {
            $parts[] = __(':count Cr', ['count' => $this->creditBalance]);
        }

        return implode(' · ', $parts);
    }
}