<?php

namespace App\Http\Services;

use App\Models\Addon;
use App\Models\Cart as CartModel;
use App\Models\Hosting;
use App\Models\OsGroup;
use App\Models\VPS;

class Cart
{

    public function addToCart($user_id = 0, $price = 0, $product = null): static
    {
        $cart = session()->get('cart') ?? [];

        $userKey = "user_$user_id";

        if (!isset($cart[$userKey])) {
            $cart[$userKey] = [];
        }

        foreach ($cart[$userKey] as $item) {
            if ($item['product'] == $product->id && $item['product_type'] == $product->type_id) {
                return $this;
            }
        }

        $cart[$userKey][] = [
            'product' => $product->id,
            'product_type' => $product->type_id,
            'price' => $price
        ];

        session()->put('cart', $cart);

        return $this;
    }


    public function cartBK($user_id = 0): ?array
    {
        if (session()->get('cart')) {
            //            $cart = session()->get('cart')["user_$user_id"];
            $cart = session()->get("cart.user_$user_id", []);

            return array_map(function ($item) {
                if ($item['product_type'] === 4) {
                    $product = VPS::find($item['product']);
                    $addOn = Addon::where('type_id', 1)->get();
                    $group = OsGroup::with('Os')->where('module_host_id', $product->ModuleHost_id)->get();
                    $item['product'] = $product;
                    $item['addon'] = $addOn;
                    $item['os_group'] = $group;
                }
                if ($item['product_type'] === 3) {
                    $product = Hosting::find($item['product']);
                    $item['product'] = $product;
                }
                return $item;
            }, $cart);
        }
        return null;
    }

    public function cart($user_id = 0): ?array
    {
        $cartItems = CartModel::where('customer_id', $user_id)->get();

        if ($cartItems->isEmpty()) {
            return null;
        }

        return $cartItems->map(function ($item) {
            $data = [
                'id' => $item->id,
                'product_type' => $item->type_product,
                'quantity' => $item->quantity,
                'price' => $item->price,
                'months' => $item->months,
            ];

            if ($item->type_product === 4) {
                $product = VPS::with('operatingSystems.osGroup')->find($item->product_id);
                $addons = Addon::where('type_id', 1)->get();
                
                // Get OS groups that are specifically assigned to this VPS product
                $osGroups = collect();
                if ($product && $product->operatingSystems->isNotEmpty()) {
                    $osGroupIds = $product->operatingSystems->pluck('osGroup.id')->filter()->unique();
                    $osGroups = OsGroup::with(['os' => function($query) use ($product) {
                        // Only get OS versions that are assigned to this specific VPS product
                        $query->whereHas('vpsProducts', function($q) use ($product) {
                            $q->where('product_id', $product->id)
                              ->where('product_type', 4);
                        });
                    }])
                    ->whereIn('id', $osGroupIds)
                    ->get();
                }


                $data['product'] = $product;
                $data['addon'] = $addons;
                $data['os_group'] = $osGroups;
            } elseif ($item->type_product === 3) {
                $product = Hosting::find($item->product_id);
                $addons = Addon::where('type_id', 1)->get();
                $osGroups = OsGroup::with('os')
                    ->where('module_host_id', $product->module_host_id)
                    ->get();
                $data['product'] = $product;
                $data['addon'] = $addons;
                $data['os_group'] = $osGroups;
            }

            return $data;
        })->toArray();
    }


    public function removeCartItem($user_id = 0, $key = 0): bool
    {
        if (session()->get('cart')) {
            $cart = session()->get('cart');

            unset($cart["user_$user_id"][$key]);

            session()->forget('coupon');

            session()->put('cart', $cart);
            return true;
        }
        return false;
    }
    public function getItem($user_id = 0, $key = 0)
    {
        if (session()->get('cart')) {
            $cart = session()->get('cart')["user_$user_id"];

            if ($cart[$key]) {
                return $cart[$key];
            }
            return null;
        }
        return null;
    }
}