lotteryLaravel/app/Services/Ticket/TicketPreviewService.php

<?php

namespace App\Services\Ticket;

use App\Models\Draw;
use App\Models\Player;
use App\Lottery\ErrorCode;
use App\Exceptions\TicketOperationException;
use App\Services\Draw\DrawHallSnapshotBuilder;
use App\Support\PlayerFundingMode;

final class TicketPreviewService
{
    public function __construct(
        private readonly PlayCatalogResolver $catalogResolver,
        private readonly PlayRuleEngine $ruleEngine,
        private readonly TicketLineInstantRebateApplicator $rebateApplicator,
        private readonly RiskPoolService $riskPoolService,
        private readonly DrawHallSnapshotBuilder $drawHallSnapshot,
        private readonly BetProviderResolver $betProviderResolver,
    ) {}

    /**
     * @param  array<string, mixed>  $payload
     * @return array<string, mixed>
     */
    public function preview(Player $player, array $payload): array
    {
        $drawNo = trim((string) ($payload['draw_id'] ?? ''));
        $draw = $drawNo === ''
            ? null
            : Draw::query()->where('draw_no', $drawNo)->first();
        if ($draw === null) {
            throw new TicketOperationException('draw_not_found', ErrorCode::BetInvalidDraw->value);
        }
        if (! $this->drawHallSnapshot->isBettingOpen($draw)) {
            throw new TicketOperationException('draw_closed', ErrorCode::DrawClosed->value);
        }

        $currencyCode = strtoupper((string) $payload['currency_code']);
        $this->assertCreditCurrencyMatchesPlayer($player, $currencyCode);
        $fallbackProviderCodes = is_array($payload['provider_codes'] ?? null)
            ? $payload['provider_codes']
            : null;

        $lines = [];
        $totalBet = 0;
        $totalRebate = 0;
        $totalActualDeduct = 0;
        $totalEstimatedPayout = 0;
        $warningRows = [];
        $closedPlayCleanupRows = [];

        foreach ((array) $payload['lines'] as $index => $line) {
            $providers = $this->betProviderResolver->resolve(
                is_array($line['provider_codes'] ?? null) ? $line['provider_codes'] : $fallbackProviderCodes,
            );
            foreach ($providers as $provider) {
                try {
                    $resolved = $this->catalogResolver->resolve((string) $line['play_code'], $currencyCode, (string) $provider['code']);
                } catch (TicketOperationException $e) {
                    if ($e->lotteryCode === ErrorCode::PlayModeClosed->value) {
                        $closedPlayCleanupRows[] = [
                            'client_line_no' => $index + 1,
                            'play_code' => (string) ($line['play_code'] ?? ''),
                        ];

                        continue 2;
                    }

                    throw $e;
                }

                $evaluated = $this->ruleEngine->evaluateLine(
                    (array) $line,
                    $resolved['play_config'],
                    $resolved['odds_items'],
                );
                $evaluated = $this->rebateApplicator->apply($player, $evaluated);

                $locks = array_map(fn (array $combo): array => [
                    'number_4d' => $combo['number_4d'],
                    'amount' => $combo['estimated_payout'],
                ], $evaluated['combinations']);
                $riskPreview = $this->riskPoolService->preview((int) $draw->id, (string) $provider['code'], $locks);
                foreach ($riskPreview as $riskRow) {
                    if ($riskRow['warning']) {
                        $warningRows[] = [
                            'provider_code' => $provider['code'],
                            'provider_name' => $provider['name'],
                            'number_4d' => $riskRow['number_4d'],
                            'message' => '该号码赔付池已使用 80% 以上，可能即将售罄',
                        ];
                    }
                }

                $rebateAmount = $this->rebateApplicator->displayRebateAmount($player, $evaluated);
                $totalBet += (int) $evaluated['total_bet_amount'];
                $totalRebate += $rebateAmount;
                $totalActualDeduct += (int) $evaluated['actual_deduct_amount'];
                $totalEstimatedPayout += (int) $evaluated['estimated_max_payout'];

                $lines[] = [
                    'client_line_no' => $index + 1,
                    'provider_code' => $provider['code'],
                    'provider_name' => $provider['name'],
                    'number' => $evaluated['original_number'],
                    'play_code' => $evaluated['play_code'],
                    'normalized_number' => $evaluated['normalized_number'],
                    'combination_count' => $evaluated['combination_count'],
                    'total_bet_amount' => $evaluated['total_bet_amount'],
                    'rebate_rate' => $evaluated['rebate_rate_snapshot'],
                    'rebate_amount' => $rebateAmount,
                    'actual_deduct_amount' => $evaluated['actual_deduct_amount'],
                    'estimated_max_payout' => $evaluated['estimated_max_payout'],
                    'risk_status' => 'ok',
                    'warnings' => [],
                    'rule_snapshot_json' => $evaluated['rule_snapshot_json'],
                ];
            }
        }

        if ($closedPlayCleanupRows !== []) {
            throw new TicketOperationException(
                'play_closed_need_cleanup',
                ErrorCode::PlayModeClosed->value,
                400,
                [
                    'cleanup_hint' => '玩法已关闭，相关注项已清理',
                    'cleanup_lines' => $closedPlayCleanupRows,
                ],
            );
        }

        $nowUtc = now()->utc();

        return [
            'draw' => [
                'draw_id' => $draw->draw_no,
                'status' => $this->drawHallSnapshot->effectiveHallDisplayStatus($draw, $nowUtc),
                'db_status' => $draw->status,
            ],
            'config_versions' => $this->catalogResolver->currentActiveVersionStamp(),
            'summary' => [
                'total_bet_amount' => $totalBet,
                'total_rebate_amount' => $totalRebate,
                'total_actual_deduct' => $totalActualDeduct,
                'total_estimated_payout' => $totalEstimatedPayout,
                'instant_rebate_applied' => ! PlayerFundingMode::usesCredit($player),
            ],
            'lines' => $lines,
            'warnings' => $warningRows,
        ];
    }

    private function assertCreditCurrencyMatchesPlayer(Player $player, string $currencyCode): void
    {
        if (! PlayerFundingMode::usesCredit($player)) {
            return;
        }

        $defaultCurrency = strtoupper((string) $player->default_currency);
        if ($currencyCode === $defaultCurrency) {
            return;
        }

        throw new TicketOperationException('credit_currency_mismatch', ErrorCode::ConfigCurrencyInvalid->value, 400, [
            'currency_code' => $currencyCode,
            'expected_currency' => $defaultCurrency,
        ]);
    }
}