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

use App\Http\Controllers\Api\Controller;
use App\OptionPair;
use App\OptionOrder;
use App\UsersWallet;
use App\AccountLog;
use App\CurrencyMatch;
use App\Currency;
use Illuminate\Http\Request;
use App\Token;
use App\Users;
use Illuminate\Support\Facades\DB;

class OptionController extends Controller
{
    public function pairs()
    {
        $pairs = OptionPair::where('status', 1)->orderBy('weigh', 'desc')->get();
        foreach ($pairs as $p) {
            $match = CurrencyMatch::find($p->currency_match_id);
            if ($match) {
                $currency = Currency::find($match->currency_id);
                $p->close = $currency ? $currency->price : 0;
                $p->price_change = $currency ? ($currency->change ?? 0) : 0;
                $p->high = $currency ? ($currency->high ?? $p->close) : 0;
                $p->low = $currency ? ($currency->low ?? $p->close) : 0;
                $p->match_legal_id = $match->legal_id;
                $p->match_currency_id = $match->currency_id;
                $p->volume_24h = $currency ? ($currency->vol ?? 0) : 0;
            }
        }
        return $this->success($pairs);
    }

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

        $pair_id = $request->input('pair_id');
        $direction = $request->input('direction');
        $amount = floatval($request->input('amount'));
        $delivery_time = $request->input('delivery_time');

        if (!in_array($direction, ['up', 'down'])) return $this->error('Invalid direction');
        if ($amount <= 0) return $this->error('Invalid amount');
        if (!$delivery_time) return $this->error('Select delivery time');

        $pair = OptionPair::where('id', $pair_id)->where('status', 1)->first();
        if (!$pair) return $this->error('Pair not available');
        if ($amount < $pair->min_amount) return $this->error('Min: ' . $pair->min_amount . ' USDC');
        if ($amount > $pair->max_amount) return $this->error('Max: ' . $pair->max_amount . ' USDC');

        $delivery_ts = is_numeric($delivery_time) ? date('Y-m-d H:i:s', $delivery_time) : $delivery_time;
        if (strtotime($delivery_ts) <= time() + 10) return $this->error('Delivery time must be in the future');

        $match = CurrencyMatch::find($pair->currency_match_id);
        $currency = $match ? Currency::find($match->currency_id) : null;
        $open_price = $currency ? floatval($currency->price) : 0;
        $fee = sprintf("%.6f", $amount * $pair->fee_rate / 100);

        DB::beginTransaction();
        try {
            $wallet = UsersWallet::where('user_id', $user->id)->where('currency', 3)->lockForUpdate()->first();
            if (!$wallet || $wallet->legal_balance < $amount) {
                DB::rollBack();
                return $this->error('Insufficient balance');
            }
            $before = $wallet->legal_balance;
            $wallet->legal_balance = bc_sub($wallet->legal_balance, $amount, 6);
            $wallet->save();
            AccountLog::insertLog(
                ['user_id' => $user->id, 'value' => -$amount, 'info' => 'Option ' . strtoupper($direction) . ' - ' . $pair->coinname, 'type' => AccountLog::MICRO_TRADE_SUBMIT, 'currency' => 3],
                ['balance_type' => 1, 'wallet_id' => $wallet->id, 'lock_type' => 0, 'before' => $before, 'change' => -$amount, 'after' => $wallet->legal_balance]
            );
            OptionOrder::create([
                'user_id' => $user->id, 'pair_id' => $pair_id,
                'symbol' => $pair->symbol, 'direction' => $direction,
                'amount' => $amount, 'fee' => $fee,
                'open_price' => $open_price, 'profit_rate' => $pair->profit_rate,
                'delivery_time' => $delivery_ts, 'status' => 0,
            ]);
            DB::commit();
            return $this->success('Order placed');
        } catch (\Exception $e) {
            DB::rollBack();
            return $this->error($e->getMessage());
        }
    }

    public function myOrders(Request $request)
    {
        $user_id = Token::getUserIdByToken(Token::getToken());
        $user = \App\Users::find($user_id);
        if (!$user) return $this->error('Please login');
        $status = $request->input('status', 'all');
        $query = OptionOrder::where('user_id', $user->id)->with('pair:id,coinname');
        if ($status !== 'all') $query->where('status', $status);
        $list = $query->orderBy('id', 'desc')->paginate(20);
        $statusMap = ['0'=>'Pending','1'=>'Win','2'=>'Lose','3'=>'Canceled'];
        foreach ($list as $item) {
            $item->status_text = $statusMap[$item->status] ?? '';
            $item->direction_text = $item->direction == 'up' ? 'Buy Up' : 'Buy Down';
            $item->coinname = $item->pair ? $item->pair->coinname : $item->symbol;
        }
        return $this->success($list);
    }
}