<?php

namespace App\Module\UrsPromotion\Services;

use App\Module\UrsPromotion\Dtos\UrsProfitDto;
use App\Module\UrsPromotion\Models\UrsUserMapping;
use App\Module\UrsPromotion\Models\UrsUserReferral;
use App\Module\UrsPromotion\Models\UrsUserTalent;
use App\Module\UrsPromotion\Models\UrsProfit;

/**
 * URS奖励分发服务
 *
 * 实现奖励发放逻辑：
 * 1. 根据URS用户ID查找上级关系链
 * 2. 检查每个上级是否已进入农场
 * 3. 如果上级未进入农场则跳过，继续处理上上级
 * 4. 记录奖励分发结果
 */
class UrsRewardDistributionService
{

    /**
     * 分发推广奖励
     *
     * @param int $ursUserId 产生收益的URS用户ID
     * @param int $sourceId 收益来源ID
     * @param string $sourceType 收益来源类型
     * @param string $profitType 收益类型
     * @param float $originalAmount 原始收益金额
     * @param array $rewardConfig 奖励配置 [level => rate]
     * @return array 分发结果
     */
    public static function distributeReward(
        int    $ursUserId,
        int    $sourceId,
        string $sourceType,
        string $profitType,
        float  $originalAmount,
        array  $rewardConfig
    ): array
    {
        $results = [];

        // 获取上级关系链
        $referralChain = self::getReferralChain($ursUserId, count($rewardConfig));

        $level = 1;
        foreach ($referralChain as $referrerUrsUserId) {
            if (!isset($rewardConfig[$level])) {
                break; // 超出配置层级
            }

            $rate         = $rewardConfig[$level];
            $profitAmount = $originalAmount * $rate;

            // 检查推荐人是否已进入农场
            $farmUserId = UrsUserMapping::getFarmUserIdByUrsUserId($referrerUrsUserId);

            if ($farmUserId === 0) {
                // 推荐人未进入农场，记录跳过状态
                $results[] = self::recordSkippedReward(
                    $referrerUrsUserId,
                    $ursUserId,
                    $sourceId,
                    $sourceType,
                    $profitType,
                    $level,
                    $originalAmount,
                    $profitAmount,
                    $rate
                );
            } else {
                // 推荐人已进入农场，记录正常奖励
                $results[] = self::recordNormalReward(
                    $referrerUrsUserId,
                    $farmUserId,
                    $ursUserId,
                    $sourceId,
                    $sourceType,
                    $profitType,
                    $level,
                    $originalAmount,
                    $profitAmount,
                    $rate
                );
            }

            $level++;
        }

        return $results;
    }

    /**
     * 获取推荐关系链
     *
     * @param int $ursUserId URS用户ID
     * @param int $maxLevels 最大层级数
     * @return array URS用户ID数组，按层级排序
     */
    private static function getReferralChain(int $ursUserId, int $maxLevels): array
    {
        return UrsReferralService::getReferralChain($ursUserId, $maxLevels);
    }

    /**
     * 记录跳过的奖励
     */
    private static function recordSkippedReward(
        $ursUserId,
        int $promotionMemberUrsUserId,
        int $sourceId,
        string $sourceType,
        string $profitType,
        int $relationLevel,
        float $originalAmount,
        float $profitAmount,
        float $profitRate
    ): array
    {
        $framUserId = UrsUserMappingService::getFarmUserId($ursUserId);

        $talent      = UrsUserTalent::where('user_id', $framUserId)->first();
        $talentLevel = $talent ? $talent->talent_level : 0;
        $profit      = UrsProfit::create([
                                             'urs_user_id'             => $ursUserId,
                                             'urs_promotion_member_id' => $promotionMemberUrsUserId,
                                             'source_id'               => $sourceId,
                                             'source_type'             => $sourceType,
                                             'profit_type'             => $profitType,
                                             'relation_level'          => $relationLevel,
                                             'original_amount'         => $originalAmount,
                                             'profit_amount'           => $profitAmount,
                                             'profit_rate'             => $profitRate,
                                             'talent_level'            => $talentLevel,
                                             'farm_user_id'            => $framUserId,
                                             'status'                  => UrsProfit::STATUS_SKIPPED,
                                         ]);

        return [
            'urs_user_id'    => $ursUserId,
            'farm_user_id'   => null,
            'relation_level' => $relationLevel,
            'profit_amount'  => $profitAmount,
            'status'         => 'skipped',
            'reason'         => '用户未进入农场',
            'profit_id'      => $profit->id,
        ];
    }

    /**
     * 记录正常奖励
     */
    private static function recordNormalReward(
        int    $ursUserId,
        int    $farmUserId,
        int    $promotionMemberUrsUserId,
        int    $sourceId,
        string $sourceType,
        string $profitType,
        int    $relationLevel,
        float  $originalAmount,
        float  $profitAmount,
        float  $profitRate
    ): array
    {
        $framUserId = UrsUserMappingService::getFarmUserId($ursUserId);

        $talent      = UrsUserTalent::where('user_id', $framUserId)->first();
        $talentLevel = $talent ? $talent->talent_level : 0;

        $profit = UrsProfit::create([
                                        'urs_user_id'             => $ursUserId,
                                        'urs_promotion_member_id' => $promotionMemberUrsUserId,
                                        'source_id'               => $sourceId,
                                        'source_type'             => $sourceType,
                                        'profit_type'             => $profitType,
                                        'relation_level'          => $relationLevel,
                                        'original_amount'         => $originalAmount,
                                        'profit_amount'           => $profitAmount,
                                        'profit_rate'             => $profitRate,
                                        'talent_level'            => $talentLevel,
                                        'farm_user_id'            => $farmUserId,
                                        'status'                  => UrsProfit::STATUS_NORMAL,
                                    ]);

        return [
            'urs_user_id'    => $ursUserId,
            'farm_user_id'   => $farmUserId,
            'relation_level' => $relationLevel,
            'profit_amount'  => $profitAmount,
            'status'         => 'success',
            'reason'         => '奖励发放成功',
            'profit_id'      => $profit->id,
        ];
    }

    /**
     * 获取用户的奖励统计
     *
     * @param int $ursUserId URS用户ID
     * @param string|null $profitType 收益类型筛选
     * @return array
     */
    public static function getUserRewardStats(int $ursUserId, ?string $profitType = null): array
    {
        $query = UrsProfit::where('urs_user_id', $ursUserId);

        if ($profitType) {
            $query->where('profit_type', $profitType);
        }

        $stats = [
            'total_amount'    => $query->sum('profit_amount'),
            'normal_count'    => $query->where('status', UrsProfit::STATUS_NORMAL)->count(),
            'skipped_count'   => $query->where('status', UrsProfit::STATUS_SKIPPED)->count(),
            'cancelled_count' => $query->where('status', UrsProfit::STATUS_CANCELLED)->count(),
        ];

        return $stats;
    }

    /**
     * 获取跳过的奖励列表
     *
     * @param int $ursUserId URS用户ID
     * @return UrsProfitDto[]
     */
    public static function getSkippedRewards(int $ursUserId): array
    {
        $profits = UrsProfit::where('urs_user_id', $ursUserId)
            ->where('status', UrsProfit::STATUS_SKIPPED)
            ->orderBy('created_at', 'desc')
            ->get();

        return $profits->map(function ($profit) {
            return UrsProfitDto::fromModel($profit);
        })->toArray();
    }

}