<?php

namespace Longyi\RewardPoints\Models;

use Illuminate\Database\Eloquent\Model;
use Webkul\Customer\Models\Customer;

class RewardActiveRule extends Model
{
    // 定义交易类型常量
    const TYPE_SIGN_IN = 1;
    const TYPE_REGISTRATION = 2;
    const TYPE_ORDER = 3;
    const TYPE_REVIEW = 4;
    const TYPE_REFERRAL = 5;
    const TYPE_BIRTHDAY = 6;
    const TYPE_SHARE = 7;
    const TYPE_SUBSCRIBE = 8;
    const TYPE_LOGIN = 9;

    protected $table = 'mw_reward_active_rules';
    protected $primaryKey = 'rule_id';
    public $timestamps = false;

    protected $fillable = [
        'rule_name', 'type_of_transaction', 'store_view', 'customer_group_ids',
        'enable_different_points_by_group', 'default_expired', 'expired_day',
        'date_event', 'comment', 'coupon_code', 'reward_point', 'status',
        'group_points'  // 添加群组积分配置字段
    ];

    protected $casts = [
        'type_of_transaction' => 'integer',
        'status' => 'boolean',
        'expired_day' => 'integer',
        'enable_different_points_by_group' => 'boolean',
        'group_points' => 'array',  // 自动 JSON 转换
    ];

    /**
     * 获取客户群组积分配置
     * 假设数据库中 group_points 字段存储 JSON，格式：{"1": 100, "2": 150}
     */
    public function getCustomerGroupPointsAttribute(): array
    {
        // 如果使用 group_points 字段（推荐）
        if (isset($this->attributes['group_points'])) {
            $value = $this->attributes['group_points'];
            if (is_string($value)) {
                return json_decode($value, true) ?: [];
            }
            return is_array($value) ? $value : [];
        }

        // 兼容其他可能的字段名
        if (isset($this->attributes['customer_group_points'])) {
            $value = $this->attributes['customer_group_points'];
            if (is_string($value)) {
                return json_decode($value, true) ?: [];
            }
            return is_array($value) ? $value : [];
        }

        return [];
    }

    /**
     * 【核心方法】统一获取客户应得的积分值
     * 整合了所有积分获取逻辑，避免重复代码
     */
    public function getPointsForCustomer($customer): int
    {
        // 获取客户群组ID
        $customerGroupId = $this->extractCustomerGroupId($customer);

        // 如果无法获取群组ID，返回0（注册、订阅等场景应该单独处理）
        if ($customerGroupId === null) {
            return 0;
        }

        // 启用群组差异化：从配置中获取该群组的积分
        if ($this->enable_different_points_by_group) {
            $groupPoints = $this->getCustomerGroupPointsAttribute();
            return (int)($groupPoints[$customerGroupId] ?? 0);
        }

        // 不启用差异化：检查群组是否在允许列表中
        if ($this->isGroupAllowed($customerGroupId)) {
            return (int)$this->reward_point;
        }

        return 0;
    }

    /**
     * 获取特定客户群组的积分值（保留向后兼容）
     */
    public function getRewardPointForCustomerGroup($customerGroupId): int
    {
        if ($this->enable_different_points_by_group) {
            $groupPoints = $this->getCustomerGroupPointsAttribute();
            return (int)($groupPoints[$customerGroupId] ?? 0);
        }

        if ($this->isGroupAllowed($customerGroupId)) {
            return (int)$this->reward_point;
        }

        return 0;
    }

    /**
     * 检查规则是否适用于指定客户
     */
    public function isApplicableToCustomer($customer): bool
    {
        // 检查 store_view
        if (!$this->isStoreViewMatched()) {
            return false;
        }

        $customerGroupId = $this->extractCustomerGroupId($customer);

        if ($customerGroupId === null) {
            return false;
        }

        // 启用群组差异化：检查是否有为该群组配置积分
        if ($this->enable_different_points_by_group) {
            $groupPoints = $this->getCustomerGroupPointsAttribute();
            return !empty($groupPoints) && isset($groupPoints[$customerGroupId]);
        }

        // 不启用差异化：检查群组是否在允许列表中
        return $this->isGroupAllowed($customerGroupId);
    }

    /**
     * 检查 store_view 是否匹配
     */
    protected function isStoreViewMatched(): bool
    {
        if (empty($this->store_view) || $this->store_view === '0') {
            return true;
        }

        $storeViews = explode(',', $this->store_view);
        $currentChannelCode = core()->getCurrentChannelCode();

        return in_array($currentChannelCode, $storeViews);
    }

    /**
     * 检查群组是否允许
     */
    protected function isGroupAllowed($customerGroupId): bool
    {
        if (empty($this->customer_group_ids) || trim($this->customer_group_ids) === '') {
            return true;
        }

        $allowedGroups = array_map('trim', explode(',', $this->customer_group_ids));
        return in_array((string)$customerGroupId, $allowedGroups);
    }

    /**
     * 提取客户群组ID
     */
    protected function extractCustomerGroupId($customer): ?string
    {
        if ($customer instanceof Customer) {
            return $customer->customer_group_id;
        }

        if (is_object($customer) && property_exists($customer, 'customer_group_id')) {
            return $customer->customer_group_id;
        }

        return null;
    }

    /**
     * 获取交易类型文本
     */
    public function getTransactionTypeTextAttribute(): string
    {
        $types = [
            self::TYPE_ORDER => 'Order',
            self::TYPE_REGISTRATION => 'Registration',
            self::TYPE_REVIEW => 'Product Review',
            self::TYPE_LOGIN => 'Login',
            self::TYPE_REFERRAL => 'Referral',
            self::TYPE_BIRTHDAY => 'Birthday',
            self::TYPE_SHARE => 'Share',
            self::TYPE_SUBSCRIBE => 'Subscription',
            self::TYPE_SIGN_IN => 'Sign In',
        ];

        return $types[$this->type_of_transaction] ?? 'Unknown';
    }

    /**
     * 作用域：获取启用的规则
     */
    public function scopeActive($query)
    {
        return $query->where('status', 1);
    }

    /**
     * 作用域：按交易类型查询
     */
    public function scopeOfType($query, $type)
    {
        return $query->where('type_of_transaction', $type);
    }
}