<?php

namespace App\Livewire;

use App\Models\Customer;
use App\Models\Order;
use Livewire\Attributes\Layout;
use Livewire\Component;

#[Layout('layouts.portal-app')]
class Billing extends Component
{
    /**
     * Record a purchase intent (order). Fulfillment (Stripe checkout + resize) is
     * mocked for now — the order is created with status 'pending'.
     */
    public function purchase(string $type, ?string $key = null): void
    {
        $customer = $this->customer();
        if ($customer === null) {
            return;
        }

        $instance = $customer->instances()->latest('id')->first();
        $currentPlan = $instance?->plan ?? 'start';
        $plans = (array) config('provisioning.plans');
        $addons = (array) config('provisioning.addons');

        [$plan, $amount, $addonKey] = match ($type) {
            'upgrade' => [$key, (int) ($plans[$key]['price_cents'] ?? 0), null],
            'storage' => [$currentPlan, (int) config('provisioning.storage_addon.price_cents', 0), null],
            'addon' => [$currentPlan, (int) ($addons[$key]['price_cents'] ?? 0), $key],
            default => [null, 0, null],
        };

        // Guard against invalid keys / non-upgrades.
        $valid = match ($type) {
            'upgrade' => isset($plans[$key]) && ($plans[$key]['price_cents'] ?? 0) > ($plans[$currentPlan]['price_cents'] ?? 0),
            'storage' => true,
            'addon' => isset($addons[$key]),
            default => false,
        };
        if (! $valid || $plan === null) {
            return;
        }

        $datacenter = $instance?->host?->datacenter
            ?? $customer->orders()->latest('id')->value('datacenter')
            ?? 'fsn';

        Order::create([
            'customer_id' => $customer->id,
            'plan' => $plan,
            'type' => $type,
            'addon_key' => $addonKey,
            'amount_cents' => $amount,
            'currency' => 'EUR',
            'datacenter' => $datacenter,
            'status' => 'pending',
        ]);

        $this->dispatch('notify', message: __('billing.purchased'));
    }

    private function customer(): ?Customer
    {
        $user = auth()->user();
        if (! $user) {
            return null;
        }

        // Prefer the explicit link; fall back to email for legacy unlinked accounts.
        return Customer::query()->where('user_id', $user->id)->first()
            ?? Customer::query()->where('email', $user->email)->first();
    }

    public function render()
    {
        $customer = $this->customer();
        $instance = $customer?->instances()->latest('id')->first();
        $plans = (array) config('provisioning.plans');
        $currentKey = $instance?->plan ?? 'start';
        $currentPrice = (int) ($plans[$currentKey]['price_cents'] ?? 0);

        $upgrades = collect($plans)
            ->filter(fn ($p, $k) => (int) ($p['price_cents'] ?? 0) > $currentPrice)
            ->keys()->all();

        return view('livewire.billing', [
            'currentKey' => $currentKey,
            'current' => $plans[$currentKey] ?? [],
            'instance' => $instance,
            'plans' => $plans,
            'upgrades' => $upgrades,
            'storage' => (array) config('provisioning.storage_addon'),
            'addons' => (array) config('provisioning.addons'),
            'pending' => $customer
                ? $customer->orders()->where('status', 'pending')->latest('id')->get()
                : collect(),
        ]);
    }
}