<?php

namespace App\Services\Settlement\Matchers;

use App\Models\TicketItem;
use Illuminate\Support\Collection;
use App\Services\Settlement\OddsSnapshotReader;
use App\Services\Settlement\PublishedDrawResultBoard;
use App\Services\Settlement\Contracts\SettlementPlayMatcher;

/** pos_2a / pos_2b / pos_2c：后二位命中对应档。 */
final class Pos2TierSettlementMatcher implements SettlementPlayMatcher
{
    /** @var array<string, string> */
    private const PLAY_TO_TIER = [
        'pos_2a' => 'first',
        'pos_2b' => 'second',
        'pos_2c' => 'third',
    ];

    public function __construct(
        private readonly OddsSnapshotReader $odds,
    ) {}

    public function match(TicketItem $item, PublishedDrawResultBoard $board, Collection $combinations): array
    {
        $tier = self::PLAY_TO_TIER[$item->play_code] ?? 'first';
        $suffix = $board->suffix2ForTier($tier, 0);
        if ($suffix === '') {
            return ['win_amount' => 0, 'matched_prize_tier' => null, 'match_detail' => ['reason' => 'no_suffix']];
        }

        $snapshot = is_array($item->odds_snapshot_json) ? $item->odds_snapshot_json : null;
        $oddsVal = $this->odds->oddsValueForScope($snapshot, $tier);
        $lines = [];
        $total = 0;

        if (substr((string) $item->normalized_number, -2) === $suffix) {
            $bet = (int) $item->unit_bet_amount;
            $total = (int) floor($bet * ($oddsVal / 10_000));
            $lines[] = [
                'number' => $item->original_number,
                'suffix2' => $suffix,
                'bet_amount' => $bet,
                'odds_value' => $oddsVal,
                'payout' => $total,
            ];
        }

        return [
            'win_amount' => $total,
            'matched_prize_tier' => $total > 0 ? $tier : null,
            'match_detail' => ['lines' => $lines],
        ];
    }
}