<?php

namespace Modules\EcommerceFinance\View;

use Illuminate\Pagination\LengthAwarePaginator;
use Modules\EcommerceFinance\Repositories\PlantingReimbursementRepository as Repository;
use Modules\EcommerceFinance\Services\PlantingLossCalculator as Calculator;

/** 种菜数据汇总 → 种菜损耗：种菜报销明细匹配近两个月发货数据，拍A发B/拍A发A、只发虚拟条码/透明挂钩的不扣款，其余按成本价×数量＋运费扣款。 */
class PlantingLossPageData
{
    use PlantingPageFilters;

    public const TITLE = '种菜损耗';

    public const PER_PAGE = 50;

    public const TEXT_FILTERS = [
        'work_order_no' => '工单编号',
        'online_order_no' => '线上订单号',
        'shop_name' => '店铺名称',
        'task_remark' => '任务备注',
        'seller_remark' => '卖家备注',
        'express_no' => '快递单号',
    ];

    public const COLUMNS = [
        'loss_result' => '损耗判定', 'deduction_amount' => '扣款金额', 'loss_basis' => '判定说明', 'deduction_detail' => '扣款计算（条码×数量×成本价＋运费）',
        'completed_at' => '报销完成时间', 'work_order_no' => '工单编号', 'platform' => '平台', 'shop_name' => '店铺名称',
        'online_order_no' => '线上订单号', 'task_remark' => '任务备注', 'seller_remark' => '卖家备注',
        'actual_paid_amount' => '实付金额', 'task_payment' => '任务付款金额', 'reimbursement_amount' => '最终报销金额',
        'shipped_at' => '发货时间', 'express_no' => '快递单号', 'warehouse_name' => '发货仓库',
        'shipped_barcode' => '发货条码', 'shipped_product_name' => '发货商品名称', 'shipped_qty' => '发货数量',
        'shipped_amount' => '发货金额', 'shipped_freight' => '发货运费',
        'initiator' => '发起人', 'payee_name' => '信誉账号名称', 'product_code' => '报销商品编码', 'product_name' => '报销商品名称',
        'internal_order_no' => '内部单号', 'erp_order_status' => 'ERP订单状态',
    ];

    public const MONEY_COLUMNS = ['deduction_amount', 'actual_paid_amount', 'task_payment', 'reimbursement_amount', 'shipped_amount', 'shipped_freight'];

    private const SUM_KEYS = ['deduction_amount', 'task_payment', 'reimbursement_amount', 'shipped_amount', 'shipped_freight'];

    public function __construct(
        private readonly Calculator $calculator,
        private readonly Repository $repository,
    ) {}

    /** @return array<string,string> */
    public function filters(): array
    {
        $filters = $this->baseFilters();
        $result = request()->query('result', Calculator::RESULT_DEDUCT);
        abort_unless(is_string($result) && ($result === 'all' || in_array($result, Calculator::RESULTS, true)), 422, '损耗判定无效。');
        $filters['result'] = $result;

        return $filters;
    }

    /**
     * @param array<string,string> $filters
     * @param list<array<string,mixed>>|null $rows
     * @return \Generator<int,array<string,mixed>>
     */
    public function rows(array $filters, ?array $rows = null): \Generator
    {
        foreach ($rows ?? $this->calculator->rows($filters['month']) as $row) {
            if ($filters['result'] !== 'all' && $row['loss_result'] !== $filters['result']) {
                continue;
            }
            if ($this->matchesText($row, $filters)) {
                yield $row;
            }
        }
    }

    public function page(): array
    {
        $filters = $this->filters();
        $page = max(1, (int) request('page', 1));
        $sync = $this->repository->syncStatus();
        $shippingSync = $this->calculator->shippingStatus();
        $empty = ['count' => 0, 'cost_missing' => 0] + array_fill_keys(self::SUM_KEYS, 0);
        $summary = ['total' => 0, 'matched' => 0, 'filtered' => $empty] + array_fill_keys(Calculator::RESULTS, $empty);
        $items = [];
        $error = $this->syncError($sync);

        if ($error === null) {
            try {
                $all = $this->calculator->rows($filters['month']);
                foreach ($all as $row) {
                    $summary['total']++;
                    $summary['matched'] += ($row['shipped_at'] ?? '') !== '' ? 1 : 0;
                    $this->add($summary[$row['loss_result']], $row);
                }
                foreach ($this->rows($filters, $all) as $row) {
                    if ($summary['filtered']['count'] >= ($page - 1) * self::PER_PAGE && count($items) < self::PER_PAGE) {
                        $items[] = $row;
                    }
                    $this->add($summary['filtered'], $row);
                }
            } catch (\Throwable $exception) {
                report($exception);
                $error = '种菜损耗暂时无法计算（工单镜像或发货数据读取失败），请稍后重试。';
                $summary = ['total' => 0, 'matched' => 0, 'filtered' => $empty] + array_fill_keys(Calculator::RESULTS, $empty);
                $items = [];
            }
        }

        return [
            'view' => 'business.pages.billing-transactions.planting-loss',
            'plantingFilters' => $filters,
            'plantingWindow' => Repository::window($filters['month']),
            'plantingShippingWindow' => Calculator::shippingWindow($filters['month']),
            'plantingMonths' => Repository::months(),
            'plantingSummary' => $summary,
            'plantingSync' => $sync,
            'plantingShippingSync' => $shippingSync,
            'plantingError' => $error,
            'plantingRows' => new LengthAwarePaginator($items, $summary['filtered']['count'], self::PER_PAGE, $page, [
                'path' => request()->url(),
                'query' => request()->except('page'),
            ]),
        ];
    }

    /** @param array<string,int> $bucket @param array<string,mixed> $row */
    private function add(array &$bucket, array $row): void
    {
        $bucket['count']++;
        $bucket['cost_missing'] += ! empty($row['cost_missing']) ? 1 : 0;
        foreach (self::SUM_KEYS as $key) {
            $bucket[$key] += self::cents($row[$key] ?? null);
        }
    }
}