<?php

namespace App\Services\Settlement\Matchers;

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

/** pos_3abc：后三位命中头/二/三任意一档；取最优档赔率。 */
final class Pos3AbcSettlementMatcher implements SettlementPlayMatcher
{
    public function __construct(
        private readonly OddsSnapshotReader $odds,
    ) {}

    public function match(TicketItem $item, PublishedDrawResultBoard $board, Collection $combinations): array
    {
        $tiers = ['first', 'second', 'third'];
        $suffixByTier = [];
        foreach ($tiers as $t) {
            $s = $board->suffix3ForTier($t, 0);
            if ($s !== '') {
                $suffixByTier[$t] = $s;
            }
        }
        if ($suffixByTier === []) {
            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;
        $lines = [];
        $total = 0;
        $bestTier = null;
        $bestRank = 99;

        foreach ($combinations as $c) {
            /** @var TicketCombination $c */
            $n = (string) $c->number_4d;
            if (strlen($n) < 3) {
                continue;
            }
            $suf = substr($n, -3);
            $hitTier = null;
            $rank = 99;
            foreach ($suffixByTier as $t => $sx) {
                if ($suf !== $sx) {
                    continue;
                }
                $r = match ($t) {
                    'first' => 0,
                    'second' => 1,
                    'third' => 2,
                    default => 99,
                };
                if ($r < $rank) {
                    $rank = $r;
                    $hitTier = $t;
                }
            }
            if ($hitTier === null) {
                continue;
            }
            $oddsVal = $this->odds->oddsValueForScope($snapshot, $hitTier);
            $bet = (int) $c->bet_amount;
            $payout = (int) floor($bet * ($oddsVal / 10_000));
            $total += $payout;
            $lines[] = ['number_4d' => $n, 'tier' => $hitTier, 'payout' => $payout];
            if ($rank < $bestRank) {
                $bestRank = $rank;
                $bestTier = $hitTier;
            }
        }

        return [
            'win_amount' => $total,
            'matched_prize_tier' => $bestTier,
            'match_detail' => ['lines' => $lines],
        ];
    }
}