<?php


namespace App\Services;

use App\Models\LhcLottery;
use App\Models\LhcOrder;
use Illuminate\Support\Facades\DB;

//六合彩开奖结算相关
class LhcSettlementService
{

    //根据期号结算订单
    public static function settle($issue)
    {
        // 1. 获取开奖结果
        $lottery = LhcLottery::where('issue', $issue)->first();
        if (!$lottery) throw new \Exception("未找到期号 {$issue} 的开奖数据");

        $numbers = is_array($lottery->numbers) ? $lottery->numbers : json_decode($lottery->numbers, true);
        $specialNum = (int)end($numbers); // 最后一个是特码
        
        // 预计算特码属性
        $attr = [
            'num'    => $specialNum,
            'zodiac' => self::getZodiac($specialNum, date('Y', strtotime($lottery->open_time))),
            'color'  => self::getColor($specialNum),
            'ds'     => $specialNum % 2 === 0 ? '双' : '单',
            'dx'     => $specialNum >= 25 ? '大' : '小', // 49通常算和局或按规则定义
        ];

        // 2. 批量获取待结算订单 (Chunk 处理防止内存溢出)
        LhcOrder::where('issue', $issue)->where('lottery_status', 'pending')
            ->chunk(100, function ($orders) use ($attr) {
                foreach ($orders as $order) {
                    $this->processOrder($order, $attr);
                }
            });
    }

    private function processOrder($order, $attr)
    {
        DB::transaction(function () use ($order, $attr) {
            $isWin = false;

            // 3. 根据玩法判断中奖
            switch ($order->play_type) {
                case 'tm_number': // 特码直选
                    $isWin = (int)$order->bet_value === $attr['num'];
                    break;
                case 'tm_sx':     // 特码生肖
                    $isWin = $order->bet_value === $attr['zodiac'];
                    break;
                case 'tm_bs':     // 特码波色
                    $isWin = $order->bet_value === $attr['color'];
                    break;
                case 'tm_ds':     // 特码单双
                    $isWin = $order->bet_value === $attr['ds'];
                    break;
                case 'tm_dx':     // 特码大小
                    // 49 一般不计大小或算和，根据实际规则改写
                    if ($attr['num'] === 49) {
                        $this->refundOrder($order); // 49退本金
                        return;
                    }
                    $isWin = $order->bet_value === $attr['dx'];
                    break;
            }

            // 4. 执行结算
            if ($isWin) {
                $bonus = $order->amount * $order->odds;
                $order->update(['lottery_status' => '2', 'win_amount' => $bonus]);
                $order->user->increment('balance', $bonus); // 派奖
            } else {
                $order->update(['lottery_status' => '1']);
            }
        });
    }

    private function refundOrder($order) {
        $order->update(['lottery_status' => '3', 'win_amount' => $order->amount]);
        $order->user->increment('balance', $order->amount);
    }

    /**
     * 获取特码对应的生肖
     * 六合彩生肖逻辑：当年的生肖对应 01, 13, 25, 37, 49
     * @param int $number 号码 (1-49)
     * @param int $year 农历年份 (如 2024)
     */
    public static function getZodiac($number, $year = null)
    {
        $year = $year ?: date('Y');
        
        // 生肖对应索引 (固定顺序)
        $zodiacList = ['鼠', '牛', '虎', '兔', '龙', '蛇', '马', '羊', '猴', '鸡', '狗', '猪'];
        
        // 计算当年的本命生肖索引 (以 2024 龙年为例)
        // 简易逻辑：(年份 - 4) % 12。2024 -> index 8 (龙)
        $currentYearZodiacIndex = ($year - 4) % 12; 
        
        // 六合彩号码是从 1 开始逆推的
        // 公式：(本命索引 - (号码 - 1) % 12 + 12) % 12
        $targetIndex = ($currentYearZodiacIndex - ($number - 1) % 12 + 12) % 12;
        
        return $zodiacList[$targetIndex];
    }

    /**
     * 获取号码对应的波色
     */
    public static function getColor($number)
    {
        $red = [1, 2, 7, 8, 12, 13, 18, 19, 23, 24, 29, 30, 34, 35, 40, 45, 46];
        $blue = [3, 4, 9, 10, 14, 15, 20, 25, 26, 31, 36, 37, 41, 42, 47, 48];
        $green = [5, 6, 11, 16, 17, 21, 22, 27, 28, 32, 33, 38, 39, 43, 44, 49];

        if (in_array($number, $red)) return '红波';
        if (in_array($number, $blue)) return '蓝波';
        if (in_array($number, $green)) return '绿波';
        return '未知';
    }

    /**
     * 获取五行 (金木水火土)
     */
    public static function getElement($number)
    {
        // 五行通常每年也会微调，此处为通用映射逻辑（示意）
        $elements = [
            '金' => [1, 2, 15, 16, 23, 24, 31, 32, 45, 46],
            '木' => [5, 6, 13, 14, 27, 28, 35, 36, 43, 44],
            '水' => [11, 12, 19, 20, 33, 34, 41, 42, 49],
            '火' => [7, 8, 21, 22, 29, 30, 37, 38],
            '土' => [3, 4, 9, 10, 17, 18, 25, 26, 39, 40, 47, 48],
        ];
        foreach ($elements as $name => $nums) {
            if (in_array($number, $nums)) return $name;
        }
    }

}