<?php

namespace App\Services\WorldCup;

use App\Services\WorldCup\Repositories\SqlWorldCupSettlementRepository;
use App\Services\WorldCup\Repositories\WorldCupSettlementRepositoryInterface;

class WorldCupSettlementService
{
    private $repository;

    public function __construct(WorldCupSettlementRepositoryInterface $repository = null)
    {
        $this->repository = $repository ?: new SqlWorldCupSettlementRepository();
    }

    public function settleMatch(int $matchId, string $result, string $actor): array
    {
        if (!in_array($result, ['home', 'draw', 'away'], true)) {
            return $this->fail('Invalid match result');
        }

        $match = $this->repository->findMatch($matchId);
        if (!$match) {
            return $this->fail('Match not found');
        }

        if (($match['status'] ?? '') === 'finished') {
            return $this->fail('Match already settled');
        }

        if ($result === 'draw' && ($match['stage'] ?? '') !== 'group') {
            return $this->fail('Draw is only available for group stage');
        }

        $bets = $this->repository->pendingBetsForMatch($matchId);
        $summary = $this->settleBets($bets, $result);
        $this->repository->markMatchFinished($matchId, $result);
        $this->repository->writeAudit($actor, 'settle_match', [
            'match_id' => $matchId,
            'result' => $result,
            'summary' => $summary,
        ]);

        return $this->success($summary);
    }

    public function settleWinner(string $selection, string $actor): array
    {
        $selection = trim($selection);
        if ($selection === '') {
            return $this->fail('Winner selection is required');
        }

        $summary = $this->settleBets($this->repository->pendingWinnerBets(), $selection);
        $this->repository->writeAudit($actor, 'settle_winner', [
            'selection' => $selection,
            'summary' => $summary,
        ]);

        return $this->success($summary);
    }

    private function settleBets(array $bets, string $winningSelection): array
    {
        $summary = [
            'won_count' => 0,
            'lost_count' => 0,
            'paid_amount' => 0,
        ];

        foreach ($bets as $bet) {
            $status = (string)$bet['selection'] === $winningSelection ? 'won' : 'lost';
            if ($status === 'won') {
                $paidAmount = $this->repository->payBet($bet);
                $summary['won_count']++;
                $summary['paid_amount'] += $paidAmount;
            } else {
                $summary['lost_count']++;
            }

            $this->repository->markBetSettled((int)$bet['bet_id'], $status);
        }

        return $summary;
    }

    private function success(array $data): array
    {
        return [
            'success' => true,
            'message' => '',
            'data' => $data,
        ];
    }

    private function fail(string $message): array
    {
        return [
            'success' => false,
            'message' => $message,
            'data' => [],
        ];
    }
}