<?php

namespace App\Module\Promotion\Logics;

use App\Module\Promotion\Enums\TALENT_LEVEL;
use App\Module\Promotion\Models\PromotionTalentConfig;
use App\Module\Promotion\Models\PromotionUserTalent;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Redis;

/**
 * 达人等级逻辑类
 *
 * 处理用户达人等级的核心业务逻辑，包括计算达人等级、更新达人等级、
 * 获取达人等级配置等功能。该类仅供内部使用，不对外提供服务。
 */
class TalentLogic
{
    /**
     * @var ReferralLogic
     */
    protected $referralLogic;

    /**
     * 构造函数
     *
     * @param ReferralLogic $referralLogic
     */
    public function __construct(ReferralLogic $referralLogic)
    {
        $this->referralLogic = $referralLogic;
    }

    /**
     * 获取用户的达人等级信息
     *
     * @param int $userId 用户ID
     * @return PromotionUserTalent|null
     */
    public function getUserTalent(int $userId): ?PromotionUserTalent
    {
        // 尝试从缓存获取
        $cacheKey = "promotion:user:{$userId}:talent";
        $cachedData = Redis::get($cacheKey);

        if ($cachedData !== null) {
            $talentData = json_decode($cachedData, true);
            $talent = new PromotionUserTalent();
            $talent->fill($talentData);
            return $talent;
        }

        // 从数据库获取
        $talent = PromotionUserTalent::where('user_id', $userId)->first();

        // 如果不存在，创建一个默认的达人等级记录
        if (!$talent) {
            $talent = $this->createDefaultTalent($userId);
        }

        // 缓存结果
        if ($talent) {
            Redis::setex($cacheKey, 86400, json_encode($talent->toArray())); // 缓存1天
        }

        return $talent;
    }

    /**
     * 创建默认的达人等级记录
     *
     * @param int $userId 用户ID
     * @return PromotionUserTalent|null
     */
    public function createDefaultTalent(int $userId): ?PromotionUserTalent
    {
        try {
            $talent = new PromotionUserTalent();
            $talent->user_id = $userId;
            $talent->talent_level = TALENT_LEVEL::NONE;
            $talent->direct_count = 0;
            $talent->promotion_count = 0;
            $talent->save();

            return $talent;
        } catch (\Exception $e) {
            Log::error("创建默认达人等级记录失败: " . $e->getMessage());
            return null;
        }
    }

    /**
     * 更新用户的达人等级
     *
     * @param int $userId 用户ID
     * @param int $talentLevel 达人等级
     * @return bool
     */
    public function updateTalentLevel(int $userId, int $talentLevel): bool
    {
        try {
            $talent = $this->getUserTalent($userId);

            if (!$talent) {
                return false;
            }

            // 如果等级没有变化，无需更新
            if ($talent->talent_level == $talentLevel) {
                return true;
            }

            $talent->talent_level = $talentLevel;
            $result = $talent->save();

            if ($result) {
                // 清除缓存
                Redis::del("promotion:user:{$userId}:talent");
            }

            return $result;
        } catch (\Exception $e) {
            Log::error("更新达人等级失败: " . $e->getMessage());
            return false;
        }
    }

    /**
     * 更新用户的团队统计数据
     *
     * @param int $userId 用户ID
     * @return bool
     */
    public function updatePromotionCounts(int $userId): bool
    {
        try {
            $talent = $this->getUserTalent($userId);

            if (!$talent) {
                return false;
            }

            // 计算直推人数
            $directCount = $this->referralLogic->countDirectReferrals($userId);

            // 计算团队总人数
            $promotionCount = $this->referralLogic->countPromotionMembers($userId);

            // 更新数据
            $talent->direct_count = $directCount;
            $talent->promotion_count = $promotionCount;
            $result = $talent->save();

            if ($result) {
                // 清除缓存
                Redis::del("promotion:user:{$userId}:talent");
            }

            return $result;
        } catch (\Exception $e) {
            Log::error("更新团队统计数据失败: " . $e->getMessage());
            return false;
        }
    }

    /**
     * 检查并更新用户的达人等级
     *
     * @param int $userId 用户ID
     * @return bool
     */
    public function checkAndUpdateTalentLevel(int $userId): bool
    {
        try {
            // 更新团队统计数据
            $this->updatePromotionCounts($userId);

            // 获取用户的达人信息
            $talent = $this->getUserTalent($userId);

            if (!$talent) {
                return false;
            }

            // 获取所有达人等级配置
            $configs = $this->getAllTalentConfigs();

            // 计算应该的达人等级
            $newLevel = TALENT_LEVEL::NONE;

            foreach ($configs as $config) {
                if ($talent->direct_count >= $config->direct_count_required &&
                    $talent->promotion_count >= $config->promotion_count_required) {
                    $newLevel = $config->level;
                }
            }

            // 如果等级有变化，更新达人等级
            if ($talent->talent_level != $newLevel) {
                return $this->updateTalentLevel($userId, $newLevel);
            }

            return true;
        } catch (\Exception $e) {
            Log::error("检查并更新达人等级失败: " . $e->getMessage());
            return false;
        }
    }

    /**
     * 获取达人等级配置
     *
     * @param int $level 等级
     * @return PromotionTalentConfig|null
     */
    public function getTalentConfig(int $level): ?PromotionTalentConfig
    {
        // 尝试从缓存获取
        $cacheKey = "promotion:talent_config:{$level}";
        $cachedData = Redis::get($cacheKey);

        if ($cachedData !== null) {
            $configData = json_decode($cachedData, true);
            $config = new PromotionTalentConfig();
            $config->fill($configData);
            return $config;
        }

        // 从数据库获取
        $config = PromotionTalentConfig::where('level', $level)->first();

        // 缓存结果
        if ($config) {
            Redis::setex($cacheKey, 86400 * 7, json_encode($config->toArray())); // 缓存7天
        }

        return $config;
    }

    /**
     * 获取所有达人等级配置
     *
     * @return array
     */
    public function getAllTalentConfigs(): array
    {
        // 尝试从缓存获取
        $cacheKey = "promotion:talent_configs";
        $cachedData = Redis::get($cacheKey);

        if ($cachedData !== null) {
            $configsData = json_decode($cachedData, true);
            $configs = [];

            foreach ($configsData as $configData) {
                $config = new PromotionTalentConfig();
                $config->fill($configData);
                $configs[] = $config;
            }

            return $configs;
        }

        // 从数据库获取
        $configs = PromotionTalentConfig::orderBy('level')->get()->toArray();

        // 缓存结果
        Redis::setex($cacheKey, 86400 * 7, json_encode($configs)); // 缓存7天

        return $configs;
    }

    /**
     * 获取达人等级分成比例
     *
     * @param int $level 等级
     * @return float
     */
    public function getTalentProfitRate(int $level): float
    {
        $config = $this->getTalentConfig($level);

        if (!$config) {
            return 0.0;
        }

        return $config->profit_rate;
    }

    /**
     * 获取达人等级权益
     *
     * @param int $level 等级
     * @return array
     */
    public function getTalentBenefits(int $level): array
    {
        $config = $this->getTalentConfig($level);

        if (!$config || empty($config->benefits)) {
            return [];
        }

        return is_array($config->benefits) ? $config->benefits : json_decode($config->benefits, true);
    }

    /**
     * 批量更新用户的达人等级
     *
     * @param array $userIds 用户ID数组
     * @return int 成功更新的数量
     */
    public function batchUpdateTalentLevels(array $userIds): int
    {
        $successCount = 0;

        foreach ($userIds as $userId) {
            if ($this->checkAndUpdateTalentLevel($userId)) {
                $successCount++;
            }
        }

        return $successCount;
    }
}