<?php

declare(strict_types=1);

namespace App\Platform\Tmall\EntityParse;

use App\Constants\RefundStatus;
use App\Constants\RefundType;
use App\Platform\Tmall\Constants\RefundStatus as TmallRefundStatus;
use App\Model\Company;
use App\Model\Order;
use App\Model\Store;
use App\Entity\Parse\EntityParse;
use Carbon\Carbon;
use Hyperf\Collection\LazyCollection;
use InvalidArgumentException;

/**
 * 天猫退款解析器
 *
 * Tmall 没有主退款和子退款的概念，每个售后单对应一个订单子项。
 * 每个售后单同时写入 refunds（主记录）和 refund_items（明细）两张表。
 */
class Refund extends EntityParse
{
    /**
     * 公司作用域匹配
     *
     * @param array $metadata
     * @return Company
     * @throws InvalidArgumentException
     */
    public function companyScopeMatch(array $metadata): Company
    {
        if (!isset($metadata['company_id'])) {
            throw new InvalidArgumentException('company_id is required in metadata');
        }

        $company = Company::find($metadata['company_id']);

        if (!$company) {
            throw new InvalidArgumentException("Company with ID {$metadata['company_id']} not found");
        }

        return $company;
    }

    /**
     * 店铺作用域匹配
     *
     * @param array $metadata
     * @return Store
     * @throws InvalidArgumentException
     */
    public function storeScopeMatch(array $metadata): Store
    {
        if (!isset($metadata['store_id'])) {
            throw new InvalidArgumentException('store_id is required in metadata');
        }

        $store = Store::find($metadata['store_id']);

        if (!$store) {
            throw new InvalidArgumentException("Store with ID {$metadata['store_id']} not found");
        }

        return $store;
    }

    /**
     * 实体数据映射 - 映射到 refunds 表
     *
     * Tmall 不存在父退款订单，因此此方法返回空值
     *
     * @param array $raw_data 原始数据数组
     * @return LazyCollection 每个元素为可供 Refund Model::fill() 使用的数组
     */
    public function entityMap(array $raw_data): LazyCollection
    {
        return LazyCollection::make();
    }

    /**
     * 获取实体的唯一键字段（用于 upsert 的 uniqueBy 参数）
     *
     * @return array
     */
    public function getUniqueBy(): array
    {
        return ['store_id', 'platform_refund_id'];
    }

    /**
     * 获取可更新的字段列表（用于 upsert 的 update 参数）
     *
     * @return array
     */
    public function getUpdateFields(): array
    {
        return [
            'order_id',
            'refund_status_id',
            'refund_type_id',
            'reason',
            'refund_amount',
            'freight_refund',
            'refund_total',
            'buyer_user_id',
            'updated_date',
            'completed_date',
            'raw',
            'ext',
            'hash',
            'updated_at',
        ];
    }

    /**
     * Tmall 没有父级退款单
     * @return bool 
     */
    public function hasParentRefund(): bool
    {
        return false;
    }

    /**
     * 格式化退款子项数据 - 映射到 refund_items 表
     *
     * Tmall 每个售后单同时作为一条 refund_item 记录
     * 需要在 refunds upsert 完成后调用，以获取 refund_id 映射
     *
     * @param array $raw_data 原始数据数组
     * @param array $platform_refund_id_to_local_refund_id_map [platform_refund_id => local db refund id]
     * @return array
     */
    public function formatRefundItemsFromRaw(array $raw_data, array| null $platform_refund_id_to_local_refund_id_map = null): array
    {
        $records = isset($raw_data[0]) ? $raw_data : [$raw_data];
        $items = [];

        foreach ($records as $record) {
            $platform_refund_id = strval($record['refund_id']);
            $tz = $this->getStore()->getTimezoneString();
            $raw = \json_encode($record);

            $items[] = [
                'company_id' => $this->getCompany()->id,
                'platform_id' => $this->getPlatform()->id,
                'store_id' => $this->getStore()->id,
                'refund_id' => 0,
                'platform_parent_refund_id' => '',
                'platform_refund_id' => $platform_refund_id,
                'refund_status_id' => $this->getRefundStatusId($record['status']),
                'refund_type_id' => $this->getRefundTypeId($record),
                'reason' => $record['reason'] ?? null,
                'currency' => 'CNY',
                'buyer_user_id' => $record['buyer_open_uid'] ?? null,
                'platform_order_id' => strval($record['tid']),
                'platform_sub_order_id' => strval($record['oid']),
                'platform_product_id' => isset($record['num_iid']) ? strval($record['num_iid']) : null,
                'quantity' => $record['num'] ?? 0,
                'refund_amount' => (float) ($record['refund_fee'] ?? 0),
                'order_created_date' => null, // @attention 暂时设置为 null， 后续会批量更新
                'order_paid_date' => null, // @attention 暂时设置为 null， 后续会批量更新
                'created_date' => Carbon::parse($record['created'], $tz)->format('Y-m-d H:i:sP'),
                'updated_date' => isset($record['modified']) ? Carbon::parse($record['modified'], $tz)->format('Y-m-d H:i:sP') : null,
                'completed_date' => isset($record['end_time']) ? Carbon::parse($record['end_time'], $tz)->format('Y-m-d H:i:sP') : null,
                'raw' => $raw,
                'ext' => null,
                'created_at' => Carbon::now()->format('Y-m-d H:i:sP'),
                'updated_at' => Carbon::now()->format('Y-m-d H:i:sP'),
            ];
        }

        return $this->fillOrderDates($items);
    }

    /**
     * 根据退款子项的 store_id + platform_order_id 查询订单，
     * 将 order_created_date 和 order_paid_date 填入 $items 数组
     *
     * 订单搜索范围：[退款 created_date - 3个月, 退款 created_date]
     *
     * @param array $items 退款子项数据数组
     * @return array 填充了订单日期的退款子项数组
     */
    protected function fillOrderDates(array $items): array
    {
        $lookups = [];
        foreach ($items as $item) {
            $key = $item['store_id'] . ':' . $item['platform_order_id'];
            if (!isset($lookups[$key])) {
                $lookups[$key] = [
                    'store_id' => $item['store_id'],
                    'platform_order_id' => $item['platform_order_id'],
                    'created_date' => $item['created_date'],
                ];
            }
        }

        if (empty($lookups)) {
            return $items;
        }

        $orderDatesMap = $this->queryOrderDates($lookups);

        dump("Matched " . count($orderDatesMap) . " orders for " . count($lookups) . " refund item lookups");

        foreach ($items as &$item) {
            $key = $item['store_id'] . ':' . $item['platform_order_id'];
            if (isset($orderDatesMap[$key])) {
                $item['order_created_date'] = $orderDatesMap[$key]['order_created_date'];
                $item['order_paid_date'] = $orderDatesMap[$key]['order_paid_date'];
            }
        }
        unset($item);

        return $items;
    }

    /**
     * 根据 store_id + platform_order_id 批量查询订单的创建时间和付款时间
     *
     * 订单搜索范围：[退款 created_date - 3个月, 退款 created_date]
     *
     * @param array $lookups [key => ['store_id', 'platform_order_id', 'created_date']]
     * @return array [store_id:platform_order_id => ['order_created_date' => ..., 'order_paid_date' => ...]]
     */
    protected function queryOrderDates(array $lookups): array
    {
        $orders = Order::query()
            ->where(function ($query) use ($lookups) {
                foreach ($lookups as $lookup) {
                    $createdDate = Carbon::parse($lookup['created_date']);
                    $query->orWhere(function ($q) use ($lookup, $createdDate) {
                        $q->where('store_id', $lookup['store_id'])
                          ->where('platform_order_id', $lookup['platform_order_id'])
                          ->whereBetween('created_date', [
                              $createdDate->copy()->subMonths(3),
                              $createdDate,
                          ]);
                    });
                }
            })
            ->get(['store_id', 'platform_order_id', 'created_date', 'paid_date']);

        $map = [];
        foreach ($orders as $order) {
            $key = $order->store_id . ':' . $order->platform_order_id;
            $map[$key] = [
                'order_created_date' => $order->created_date,
                'order_paid_date' => $order->paid_date,
            ];
        }

        return $map;
    }

    /**
     * 将 Tmall 退款状态映射为系统退款状态 ID
     *
     * @param string $platformStatus
     * @return int
     */
    public function getRefundStatusId(string $platform_status): int
    {
        $map = $this->refundStatusMap();
        return $map[$platform_status] ?? RefundStatus::APPLIED->value;
    }

    /**
     * Tmall 退款状态 → 系统退款状态映射
     *
     * @return array<string, int>
     */
    private function refundStatusMap(): array
    {
        return [
            TmallRefundStatus::WAIT_SELLER_AGREE->value       => RefundStatus::APPLIED->value,
            TmallRefundStatus::WAIT_BUYER_RETURN_GOODS->value  => RefundStatus::SELLER_ACCEPTED->value,
            TmallRefundStatus::WAIT_SELLER_CONFIRM_GOODS->value => RefundStatus::SELLER_ACCEPTED->value,
            TmallRefundStatus::SELLER_REFUSE_BUYER->value      => RefundStatus::REFUSED->value,
            TmallRefundStatus::SUCCESS->value                  => RefundStatus::SUCCESS->value,
            TmallRefundStatus::CLOSED->value                   => RefundStatus::CLOSED->value,
        ];
    }

    /**
     * 根据 Tmall 售后单数据判断退款类型
     *
     * @param array $record 单条售后单原始数据
     * @return int
     */
    public function getRefundTypeId(array $record): int
    {
        $has_good_return = $record['has_good_return'] ?? false;
        $good_status = $record['good_status'] ?? '';

        // 买家已退货或等待退货 → 退货退款
        if ($has_good_return) {
            return RefundType::RETURN_AND_REFUND->value;
        }

        // 买家未收到货 → 仅退款
        if ($good_status === 'BUYER_NOT_RECEIVED') {
            return RefundType::REFUND_ONLY->value;
        }

        // 买家已收货但无须退货 → 退款无须退货
        if ($good_status === 'BUYER_RECEIVED') {
            return RefundType::REFUND_WITHOUT_RETURN->value;
        }

        return RefundType::REFUND_ONLY->value;
    }
}