<?php
declare(strict_types=1);

namespace app\api\logic;

use app\dice\model\player\DicePlayer;
use app\dice\model\player_wallet_record\DicePlayerWalletRecord;
use app\api\cache\UserCache;
use plugin\saiadmin\exception\ApiException;
use support\think\Db;

/**
 * 购买抽奖券套餐：次数 => [消耗coin, 购买次数paid, 赠送次数free]
 * 仅支持 1、5、10 档
 */
class GameLogic
{
    public const PACKAGES = [
        1  => ['coin' => 100,  'paid' => 1,  'free' => 0],   // 1次/100coin
        5  => ['coin' => 500,  'paid' => 5,  'free' => 1],   // 5张/500coin（5购买+1赠送，共6次）
        10 => ['coin' => 1000, 'paid' => 10, 'free' => 3],   // 10张/1000coin（10购买+3赠送，共13次）
    ];

    /** 钱包流水类型：购买抽奖次数 */
    public const WALLET_TYPE_BUY_DRAW = 2;

    /**
     * 购买抽奖券
     * @param int $playerId 玩家ID（即 user_id）
     * @param int $count 购买档位：1 / 5 / 10
     * @return array 更新后的 coin, total_draw_count, paid_draw_count, free_draw_count
     */
    public function buyLotteryTickets(int $playerId, int $count): array
    {
        if (!isset(self::PACKAGES[$count])) {
            throw new ApiException('购买抽奖券错误');
        }
        $pack = self::PACKAGES[$count];
        $cost = $pack['coin'];
        $addPaid = $pack['paid'];
        $addFree = $pack['free'];
        $addTotal = $addPaid + $addFree;

        $player = DicePlayer::find($playerId);
        if (!$player) {
            throw new ApiException('用户不存在');
        }
        $coinBefore = (float) $player->coin;
        if ($coinBefore < $cost) {
            throw new ApiException('平台币不足');
        }

        $coinAfter = $coinBefore - $cost;
        $totalBefore = (int) ($player->total_draw_count ?? 0);
        $paidBefore = (int) ($player->paid_draw_count ?? 0);
        $freeBefore = (int) ($player->free_draw_count ?? 0);

        Db::transaction(function () use (
            $player,
            $playerId,
            $cost,
            $coinBefore,
            $coinAfter,
            $addTotal,
            $addPaid,
            $addFree,
            $totalBefore,
            $paidBefore,
            $freeBefore
        ) {
            $player->coin = $coinAfter;
            $player->total_draw_count = $totalBefore + $addTotal;
            $player->paid_draw_count = $paidBefore + $addPaid;
            $player->free_draw_count = $freeBefore + $addFree;
            $player->save();

            DicePlayerWalletRecord::create([
                'player_id'         => $playerId,
                'coin'              => -$cost,
                'type'              => self::WALLET_TYPE_BUY_DRAW,
                'wallet_before'     => $coinBefore,
                'wallet_after'      => $coinAfter,
                'total_draw_count'  => $addTotal,
                'paid_draw_count'   => $addPaid,
                'free_draw_count'   => $addFree,
                'remark'            => "购买抽奖券{$addTotal}次（付费{$addPaid}次+赠送{$addFree}次）",
            ]);
        });

        $updated = DicePlayer::find($playerId);
        $userArr = $updated->hidden(['password'])->toArray();
        UserCache::setUser($playerId, $userArr);

        return [
            'coin'               => (float) $updated->coin,
            'total_draw_count'   => (int) $updated->total_draw_count,
            'paid_draw_count'    => (int) $updated->paid_draw_count,
            'free_draw_count'    => (int) $updated->free_draw_count,
        ];
    }
}