<?php
namespace App\Http\Controllers\Api;

use App\Http\Controllers\Api\Controller;
use App\C2cMerchant;
use App\C2cMerchantOrder;
use Illuminate\Http\Request;
use App\Token;
use App\Users;

class C2cMerchantController extends Controller
{
    public function list(Request $request)
    {
        $query = C2cMerchant::where('status', 1);

        $crypto = $request->input('crypto_currency');
        if ($crypto) $query->where('crypto_currency', $crypto);

        $fiat = $request->input('fiat_currency');
        if ($fiat) $query->where('fiat_currency', $fiat);

        $list = $query->orderBy('sort', 'desc')->orderBy('id', 'desc')->get();
        return $this->success($list);
    }

    public function createOrder(Request $request)
    {
        $user_id = Token::getUserIdByToken(Token::getToken());
        $user = \App\Users::find($user_id);
        if (!$user) return $this->error('Please login');

        $merchant_id = intval($request->input('merchant_id'));
        $direction = $request->input('direction'); // buy / sell
        $amount = floatval($request->input('amount'));

        if (!in_array($direction, ['buy', 'sell'])) return $this->error('Invalid direction');
        if ($amount <= 0) return $this->error('Invalid amount');

        $merchant = C2cMerchant::find($merchant_id);
        if (!$merchant || $merchant->status != 1) return $this->error('Merchant not available');

        if ($amount < $merchant->min_amount) return $this->error('Min: ' . $merchant->min_amount);
        if ($merchant->max_amount > 0 && $amount > $merchant->max_amount) return $this->error('Max: ' . $merchant->max_amount);
        if ($merchant->available_qty > 0 && $amount > $merchant->available_qty) return $this->error('Insufficient merchant stock');

        $unit_price = floatval($merchant->unit_price);
        $total_price = round($amount * $unit_price, 6);
        $fee_rate = 0.002; // 0.2%
        $fee = round($total_price * $fee_rate, 6);

        $order_no = date('YmdHis') . rand(1000, 9999);
        $expire_time = date('Y-m-d H:i:s', time() + 1800);

        $order = C2cMerchantOrder::create([
            'order_no' => $order_no,
            'user_id' => $user->id,
            'merchant_id' => $merchant_id,
            'direction' => $direction,
            'crypto_currency' => $merchant->crypto_currency,
            'fiat_currency' => $merchant->fiat_currency,
            'amount' => $amount,
            'unit_price' => $unit_price,
            'total_price' => $total_price,
            'fee' => $fee,
            'fee_rate' => $fee_rate,
            'status' => 0,
            'contact_type' => $merchant->contact_type,
            'contact_link' => $merchant->contact_link,
            'expire_time' => $expire_time,
        ]);

        $order->merchant_name = $merchant->name;
        return $this->success($order);
    }

    public function myOrders(Request $request)
    {
        $user_id = Token::getUserIdByToken(Token::getToken());
        $user = \App\Users::find($user_id);
        if (!$user) return $this->error('Please login');

        $query = C2cMerchantOrder::where('user_id', $user->id)
            ->with('merchant:id,name,logo');

        $status = $request->input('status');
        if ($status !== null && $status !== '' && $status !== 'all') {
            $query->where('status', intval($status));
        }

        $data = $query->orderBy('id', 'desc')->paginate(intval($request->input('limit', 20)));

        $statusMap = [0 => 'Pending', 1 => 'Completed', 2 => 'Cancelled', 3 => 'Expired'];
        foreach ($data as $item) {
            $item->status_text = $statusMap[$item->status] ?? '';
        }
        return $this->success($data);
    }

    public function orderDetail(Request $request)
    {
        $user_id = Token::getUserIdByToken(Token::getToken());
        $user = \App\Users::find($user_id);
        if (!$user) return $this->error('Please login');

        $id = intval($request->input('id'));
        $order = C2cMerchantOrder::with('merchant:id,name,logo,contact_type,contact_link')
            ->where('id', $id)->where('user_id', $user->id)->first();
        if (!$order) return $this->error('Order not found');

        $statusMap = [0 => 'Pending', 1 => 'Completed', 2 => 'Cancelled', 3 => 'Expired'];
        $order->status_text = $statusMap[$order->status] ?? '';
        return $this->success($order);
    }
}