<?php

namespace App\Http\Controllers\Admin;

use App\DB\Te\TableEngine;
use App\Http\Controllers\Controller;
use App\Models\ConditionalOrder;
use App\Models\Customer;
use App\Models\Product;
use App\Services\ConditionalOrderService;
use App\Services\ConfigService;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Symfony\Component\HttpKernel\Exception\UnprocessableEntityHttpException;

class ConditionalOrderController extends Controller
{
    public function table(Request $request)
    {
        $query = ConditionalOrder::query()->with(['customer', 'product']);

        TableEngine::create($query, $request->all())
            ->initSearch(['customer_id', 'product_id', 'status', 'direction', 'price_condition'])
            ->select(['*'])
            ->export($query);

        return $query;
    }

    public function store(Request $request)
    {
        $data = $this->validatedPayload($request);
        $customer = Customer::findOrFail($data['customer_id']);

        $service = app(ConditionalOrderService::class);
        if (! app(ConfigService::class)->isConditionalOrderEnabled()) {
            throw new UnprocessableEntityHttpException('قابلیت سفارش شرطی سراسری خاموش است.');
        }
        if (! $customer->conditional_order_active) {
            throw new UnprocessableEntityHttpException('سفارش شرطی برای این مشتری مجاز نیست.');
        }
        $service->assertWithinLimit($customer);

        $fee = 0;
        DB::beginTransaction();
        try {
            $fee = $service->chargeRegistrationFee($customer);
            $order = ConditionalOrder::create([
                ...$data,
                'is_active' => $data['is_active'] ?? true,
                'status' => ConditionalOrder::STATUS_PENDING,
                'fee_charged' => $fee,
            ]);
            DB::commit();
        } catch (\Throwable $e) {
            DB::rollBack();
            throw $e;
        }

        return response()->json($order->load(['customer', 'product']), 201);
    }

    public function update(Request $request, int $id)
    {
        $order = ConditionalOrder::findOrFail($id);
        $data = $this->validatedPayload($request, true);
        unset($data['customer_id']);
        $order->update($data);

        return response()->json(true);
    }

    public function toggleActive(int $id)
    {
        $order = ConditionalOrder::findOrFail($id);
        if ($order->status !== ConditionalOrder::STATUS_PENDING) {
            throw new UnprocessableEntityHttpException('فقط سفارش‌های در انتظار قابل فعال/غیرفعال‌سازی هستند.');
        }

        $order->is_active = ! $order->is_active;
        $order->save();

        return response()->json(['is_active' => (bool) $order->is_active]);
    }

    public function destroy(int $id)
    {
        ConditionalOrder::findOrFail($id)->delete();

        return response()->json(true);
    }

    private function validatedPayload(Request $request, bool $partial = false): array
    {
        $rules = [
            'customer_id' => ($partial ? 'sometimes|' : '') . 'required|integer|exists:customers,id',
            'product_id' => ($partial ? 'sometimes|' : '') . 'required|integer|exists:products,id',
            'direction' => ($partial ? 'sometimes|' : '') . 'required|integer|in:1,2',
            'price_condition' => ($partial ? 'sometimes|' : '') . 'required|in:gte,lte',
            'trigger_price' => ($partial ? 'sometimes|' : '') . 'required|numeric|min:1',
            'amount' => 'nullable|numeric|min:0',
            'number' => 'nullable|numeric|min:0',
            'expires_at' => 'nullable|date',
            'description' => 'nullable|string|max:2000',
            'is_active' => 'sometimes|boolean',
        ];

        $data = $request->validate($rules);

        $productId = (int) ($data['product_id'] ?? $request->input('product_id') ?? 0);
        $product = $productId > 0 ? Product::find($productId) : null;

        $amount = isset($data['amount']) ? (float) $data['amount'] : null;
        $number = isset($data['number']) ? (float) $data['number'] : null;

        if (! $partial) {
            if (($amount === null || $amount <= 0) && ($number === null || $number <= 0)) {
                throw new UnprocessableEntityHttpException('مقدار یا تعداد را وارد کنید.');
            }
        }

        if ($product && $amount !== null && $amount > 0 && ($number === null || $number <= 0)) {
            $unit = (float) ($product->amount ?? 0);
            if ($unit > 0 && ! in_array(trim((string) ($product->group_type ?? '')), ['آبشده', 'کاتد مس'], true)
                && ! (bool) ($product->trade_by_quantity ?? false)) {
                $data['number'] = $amount;
                $data['amount'] = null;
            }
        }

        return $data;
    }
}