<?php
namespace App\Controllers\Web;

use App\Core\WebBaseController;
use Db\Database;

class BetController extends WebBaseController {

    public function placeBet() {
        $this->checkWebLogin();
        header('Content-Type: application/json');

        $userId = $this->getCurrentUserId();
        $data = json_decode(file_get_contents('php://input'), true);

        if (empty($data['bets']) || empty($data['period_number']) || empty($data['game_id'])) {
            echo json_encode(['success' => false, 'message' => 'Missing required fields']);
            return;
        }

        $gameId = (int)$data['game_id'];
        $periodNumber = $data['period_number'];
        $bets = $data['bets'];
        $db = new Database();

        // 验证期号
        $period = $db->get('periods', '*', ['period_number' => $periodNumber, 'game_id' => $gameId]);
        if (!$period || $period['status'] !== 'pending') {
            echo json_encode(['success' => false, 'message' => 'Period is not open for betting']);
            return;
        }

        // 赔率映射
        $oddsList = $db->select('game_odds', '*', ['game_id' => $gameId]);
        $oddsMap = [];
        foreach ($oddsList as $o) {
            $oddsMap[$o['type'] . '_' . $o['target']] = (float)$o['odds'];
        }

        // 用户信息
        $user = $db->get('users', '*', ['id' => $userId]);
        $isVirtual = (int)($user['is_virtual'] ?? 0);

        // 代理专属赔率覆盖
        if (!empty($user['agent_id'])) {
            $agentOdds = $db->select('agent_odds', '*', ['agent_id' => $user['agent_id'], 'game_id' => $gameId]);
            foreach ($agentOdds as $ao) {
                $oddsMap[$ao['bet_type'] . '_' . $ao['bet_target']] = (float)$ao['odds'];
            }
        }

        // 限额
        $limitsRaw = $db->select('bet_limits', '*', ['game_id' => $gameId]);
        $limits = [];
        foreach ($limitsRaw as $l) { $limits[$l['bet_type']] = $l; }

        // 验证投注
        $totalAmount = 0;
        $validBets = [];
        foreach ($bets as $bet) {
            $type = $bet['type'] ?? '';
            $target = $bet['value'] ?? $bet['target'] ?? '';
            $amount = floatval($bet['amount'] ?? 0);
            if ($amount <= 0) continue;

            $key = $type . '_' . $target;
            $odds = $oddsMap[$key] ?? null;
            if ($odds === null) {
                echo json_encode(['success' => false, 'message' => "Invalid bet: $key"]);
                return;
            }

            // 限额检查
            if (isset($limits[$type])) {
                if ($amount < (float)$limits[$type]['min_amount']) {
                    echo json_encode(['success' => false, 'message' => "Min bet for $type: " . $limits[$type]['min_amount']]);
                    return;
                }
                if ($amount > (float)$limits[$type]['max_amount']) {
                    echo json_encode(['success' => false, 'message' => "Max bet for $type: " . $limits[$type]['max_amount']]);
                    return;
                }
            }

            $totalAmount += $amount;
            $validBets[] = ['type' => $type, 'target' => $target, 'amount' => $amount, 'odds' => $odds];
        }

        if (empty($validBets)) {
            echo json_encode(['success' => false, 'message' => 'No valid bets']);
            return;
        }

        // 事务
        try {
            $db->medoo->pdo->beginTransaction();

            $stmt = $db->medoo->pdo->prepare("SELECT balance FROM users WHERE id = :id FOR UPDATE");
            $stmt->execute([':id' => $userId]);
            $userRow = $stmt->fetch(\PDO::FETCH_ASSOC);
            $currentBalance = (float)$userRow['balance'];

            if ($currentBalance < $totalAmount) {
                $db->medoo->pdo->rollBack();
                echo json_encode(['success' => false, 'message' => 'Insufficient balance']);
                return;
            }

            $newBalance = $currentBalance - $totalAmount;
            $db->update('users', ['balance' => $newBalance], ['id' => $userId]);

            $db->insert('transactions', [
                'user_id' => $userId, 'type' => 'bet', 'amount' => -$totalAmount,
                'balance_before' => $currentBalance, 'balance_after' => $newBalance,
                'related_id' => $period['id'], 'description' => ($db->get('games', 'name', ['id' => $gameId]) ?: 'Game') . ' Bet - ' . $periodNumber,
                'is_virtual' => $isVirtual, 'created_at' => date('Y-m-d H:i:s'),
            ]);

            foreach ($validBets as $vb) {
                $db->insert('bets', [
                    'user_id' => $userId, 'game_id' => $gameId,
                    'period_number' => $periodNumber, 'period_id' => $period['id'],
                    'bet_type' => $vb['type'], 'bet_value' => $vb['target'],
                    'amount' => $vb['amount'], 'odds' => $vb['odds'],
                    'status' => 'pending', 'is_virtual' => $isVirtual,
                    'agent_id' => $user['agent_id'] ?? null,
                    'created_at' => date('Y-m-d H:i:s'),
                ]);
            }

            $db->medoo->pdo->commit();
            echo json_encode(['success' => true, 'message' => 'Bet placed successfully', 'new_balance' => $newBalance]);
        } catch (\Throwable $e) {
            if ($db->medoo->pdo->inTransaction()) $db->medoo->pdo->rollBack();
            echo json_encode(['success' => false, 'message' => 'System error']);
        }
    }
}