<?php

namespace Modules\EcommerceFinance\Services;

class ShengsuanOrderProfitRowMapper
{
    public const TABLE = 'ops_shengsuan_order_profit_rows';

    private const FEE_FIELDS = [
        '包材费(自动匹配)' => 'matched_package_fee',
        '快递费(自动匹配)' => 'matched_freight_fee',
        '账单费用(自动匹配)' => 'matched_bill_fee',
        '分类单成本生成费用' => 'generated_classification_fee',
        '商品成本生成费用' => 'generated_product_fee',
        '人工维护' => 'manual_fee',
        '订单费用' => 'order_fee',
        '其中：推广费' => 'promotion_fee',
    ];

    private const ROW_FIELDS = [
        '店铺名称' => 'shop_name',
        '线上单号' => 'online_order_no',
        '内部单号' => 'internal_order_no',
        '发货时间' => 'ship_time',
        '商品成本' => 'product_cost',
    ];

    public function table(): string
    {
        return self::TABLE;
    }

    /**
     * @param array<string,mixed> $decoded
     * @return list<array<string,mixed>>
     */
    public function rows(array $decoded): array
    {
        $data = $decoded['data'] ?? $decoded;
        if (! is_array($data)) {
            return [];
        }

        $heads = is_array($data['fldHeads'] ?? null) ? $data['fldHeads'] : [];
        $dataList = is_array($data['dataList'] ?? null) ? $data['dataList'] : [];

        $fields = [];
        foreach (self::ROW_FIELDS + self::FEE_FIELDS as $title => $field) {
            $fields[$field] = $this->fieldForTitle($heads, $title);
        }

        $rows = [];
        $now = now();
        foreach ($dataList as $record) {
            if (! is_array($record)) {
                continue;
            }

            $shopName = trim((string) $this->value($record, $fields['shop_name'] ?? null));
            $onlineOrder = trim((string) $this->value($record, $fields['online_order_no'] ?? null));
            $internalOrder = trim((string) $this->value($record, $fields['internal_order_no'] ?? null));
            $orderNo = $onlineOrder !== '' ? $onlineOrder : $internalOrder;
            if ($shopName === '' || $orderNo === '') {
                continue;
            }

            $row = [
                'shop_name' => $shopName,
                'online_order_no' => $onlineOrder !== '' ? $onlineOrder : null,
                'internal_order_no' => $internalOrder !== '' ? $internalOrder : null,
                'order_key' => $shopName . '|' . $orderNo,
                'ship_time' => $this->dateTime($this->value($record, $fields['ship_time'] ?? null)),
                'product_cost' => $this->decimal($this->value($record, $fields['product_cost'] ?? null)),
                'source_payload' => json_encode($record, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES),
                'synced_at' => $now,
                'created_at' => $now,
                'updated_at' => $now,
            ];
            foreach (self::FEE_FIELDS as $title => $column) {
                $row[$column] = $this->decimal($this->value($record, $fields[$column] ?? null));
            }

            $rows[] = $row;
        }

        return $rows;
    }

    /**
     * @param list<array<string,mixed>> $heads
     */
    private function fieldForTitle(array $heads, string $title): ?string
    {
        foreach ($heads as $head) {
            if (trim((string) ($head['title'] ?? '')) === $title) {
                $field = trim((string) ($head['fld'] ?? ''));

                return $field === '' ? null : $field;
            }
        }

        return null;
    }

    /** @param array<string,mixed> $record */
    private function value(array $record, ?string $field): mixed
    {
        return $field === null ? null : ($record[$field] ?? null);
    }

    private function decimal(mixed $value): ?float
    {
        if ($value === null || $value === '') {
            return null;
        }

        return is_numeric($value) ? round((float) $value, 2) : null;
    }

    private function dateTime(mixed $value): ?string
    {
        if ($value === null || trim((string) $value) === '') {
            return null;
        }
        $timestamp = strtotime((string) $value);

        return $timestamp === false ? null : date('Y-m-d H:i:s', $timestamp);
    }
}