<?php

namespace App\Http\Resources\Api\Service;

use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;

class ServiceResource extends JsonResource
{
    /**
     * Transform the resource into an array.
     *
     * @return array<string, mixed>
     */
    public function toArray(Request $request): array
    {
        $billingCycleLabels = [
            'monthly'      => 'Hàng tháng',
            'quarterly'    => 'Hàng quý',
            'semiannually' => 'Nửa năm',
            'annually'     => 'Hàng năm',
            'biennially'   => '2 năm',
            'triennially'  => '3 năm',
            'onetime'      => 'Một lần',
        ];

        $periodUnits = [
            'monthly'      => 'month',
            'quarterly'    => 'quarter',
            'semiannually' => 'semi_year',
            'annually'     => 'year',
            'biennially'   => 'biennially',
            'triennially'  => 'triennially',
            'onetime'      => 'none',
        ];

        $periodMonths = [
            'monthly'      => 1,
            'quarterly'    => 3,
            'semiannually' => 6,
            'annually'     => 12,
            'biennially'   => 24,
            'triennially'  => 36,
            'onetime'      => 0,
        ];

        return [
            'uuid' => $this->uuid,
            'name' => $this->name,
            'slug' => $this->slug,
            'short_description' => $this->short_description,
            'description' => $this->description,
            'thumbnail' => $this->thumbnail ? asset($this->thumbnail) : null,
            'product_type' => $this->product_type,
            'page_type' => $this->resolvePageType($this->product_type),
            'specs' => [
                'cpu' => (int) $this->cpu,
                'ram' => (int) $this->ram,
                'disk' => (int) $this->disk,
                'bandwidth' => (int) $this->bandwidth,
                'gpu' => $this->gpu
            ],
            'stock' => $this->stock,
            'price' => (int) $this->price,
            'price_sale' => $this->price_sale ? (int) $this->price_sale : null,
            'group' => $this->category->name ?? null,
            'os' => $this->osVersions->groupBy('os_group_id')->map(function ($versions) {
                $group = $versions->first()->osGroup;
                return [
                    'name' => $group?->name,
                    'thumbnail' => $group?->thumbnail,
                    'versions' => $versions->map(fn($os) => [
                        'id' => $os->id,
                        'version' => $os->version,
                        'name' => $os->name,
                    ])->values(),
                ];
            })->values(),
            'pricing' => $this->pricings
                ->sortBy(fn($p) => $periodMonths[$p->billing_cycle] ?? 999)
                ->values()
                ->map(fn($p) => [
                    'id' => $p->id,
                    'name' => $billingCycleLabels[$p->billing_cycle] ?? $p->billing_cycle,
                    'price' => (int) $p->price,
                    'price_sale' => $p->price_sale ? (int) $p->price_sale : null,
                    'period' => $periodMonths[$p->billing_cycle] ?? 1,
                    'period_unit' => $periodUnits[$p->billing_cycle] ?? 'month',
                ]),
        ];
    }

    private function resolvePageType(?string $productType): string
    {
        return match ($productType) {
            'vps', 'cloud' => 'service_vps',
            'hosting', 'email', 'ssl' => 'service_hosting',
            'domain' => 'service_domain',
            'blog' => 'blog',
            default => 'service_vps',
        };
    }
}