<?php

namespace Modules\EcommerceFinance\Repositories;

use Modules\EcommerceFinance\Services\UpstreamReadOnlyQuery;
use Modules\EcommerceFinance\Services\UpstreamReadOnlyQueryFactory;

/**
 * Completed product price-limit approvals from the operations replica.
 */
class ProductPriceRepository
{
    private const SOURCE = 'operations_replica';

    private const TABLE = '[rpt].[Bulk_Price_Limit]';

    private readonly UpstreamReadOnlyQuery $query;

    public function __construct(UpstreamReadOnlyQueryFactory $queries)
    {
        $this->query = $queries->forSource(self::SOURCE);
    }

    /** @return array{rows:array<int,array<string,mixed>>} */
    public function paginate(array $filters, int $page, int $limit): array
    {
        $page = max($page, 1);
        $limit = min(max($limit, 1), 100);
        $where = [];
        $bindings = [];

        if (($filters['barcode'] ?? '') !== '') {
            $where[] = "[product_code] LIKE ? ESCAPE '\\'";
            $bindings[] = $this->contains((string) $filters['barcode']);
        }

        if (($filters['completed_from'] ?? '') !== '') {
            $where[] = '[process_end_date] >= CAST(? AS date)';
            $bindings[] = (string) $filters['completed_from'];
        }

        if (($filters['completed_to'] ?? '') !== '') {
            $where[] = '[process_end_date] < DATEADD(day, 1, CAST(? AS date))';
            $bindings[] = (string) $filters['completed_to'];
        }

        $whereSql = $where === [] ? '' : ' WHERE ' . implode(' AND ', $where);
        $offset = ($page - 1) * $limit;
        $fetch = $limit + 1;
        $sql = 'SELECT '
            . '[product_code] AS barcode, '
            . '[spu] AS spu, '
            . '[product_name] AS product_name, '
            . '[category] AS category, '
            . '[production_status] AS production_status, '
            . '[min_price] AS minimum_price, '
            . '[price_limit] AS price_limit, '
            . '[purchase_price] AS purchase_price, '
            . '[shipping_fee] AS shipping_fee, '
            . '[jingxi_limit_price] AS jingxi_limit_price, '
            . "CASE [status] WHEN 'COMPLETED' THEN N'已完成' ELSE NULLIF([status], '') END AS approval_status, "
            . "CASE [result] WHEN 'agree' THEN N'已同意' WHEN 'refuse' THEN N'已拒绝' ELSE NULLIF([result], '') END AS approval_result, "
            . '[title] AS workflow_title, '
            . 'CONVERT(varchar(19), [process_end_date], 120) AS completed_at '
            . 'FROM ' . self::TABLE
            . $whereSql
            . ' ORDER BY [process_end_date] DESC, [businessId] DESC, [product_code] ASC'
            . " OFFSET {$offset} ROWS FETCH NEXT {$fetch} ROWS ONLY";

        return ['rows' => array_map([$this, 'normalize'], $this->query->select($sql, $bindings))];
    }

    /**
     * 按稳定游标分批读取已完成的上游记录，只供后台镜像同步使用。
     *
     * @param array{completed_at:string,business_id:string,barcode:string}|null $cursor
     * @return array<int,array<string,mixed>>
     */
    public function mirrorBatch(?array $cursor, string $since, string $until, int $limit): array
    {
        $limit = min(max($limit, 1), 2000);
        $bindings = [$since, $until];
        $cursorSql = '';

        if ($cursor !== null) {
            $cursorSql = ' AND ('
                . '[process_end_date] > CAST(? AS datetime2(7))'
                . " OR ([process_end_date] = CAST(? AS datetime2(7)) AND COALESCE([businessId], '') > ?)"
                . " OR ([process_end_date] = CAST(? AS datetime2(7)) AND COALESCE([businessId], '') = ?"
                . " AND COALESCE([product_code], '') > ?)"
                . ')';
            $bindings = array_merge($bindings, [
                $cursor['completed_at'],
                $cursor['completed_at'],
                $cursor['business_id'],
                $cursor['completed_at'],
                $cursor['business_id'],
                $cursor['barcode'],
            ]);
        }

        $sql = "SELECT TOP {$limit} "
            . "COALESCE([businessId], '') AS business_id, "
            . "COALESCE([product_code], '') AS barcode, "
            . '[spu] AS spu, '
            . '[product_name] AS product_name, '
            . '[category] AS category, '
            . '[production_status] AS production_status, '
            . '[min_price] AS minimum_price, '
            . '[price_limit] AS price_limit, '
            . '[purchase_price] AS purchase_price, '
            . '[shipping_fee] AS shipping_fee, '
            . '[jingxi_limit_price] AS jingxi_limit_price, '
            . "CASE [status] WHEN 'COMPLETED' THEN N'已完成' ELSE NULLIF([status], '') END AS approval_status, "
            . "CASE [result] WHEN 'agree' THEN N'已同意' WHEN 'refuse' THEN N'已拒绝' ELSE NULLIF([result], '') END AS approval_result, "
            . '[title] AS workflow_title, '
            . 'CONVERT(varchar(33), [process_end_date], 126) AS cursor_completed_at, '
            . 'CONVERT(varchar(26), [process_end_date], 121) AS completed_at '
            . 'FROM ' . self::TABLE
            . ' WHERE [process_end_date] IS NOT NULL'
            . ' AND [process_end_date] >= CAST(? AS datetime2(7))'
            . ' AND [process_end_date] < CAST(? AS datetime2(7))'
            . $cursorSql
            . " ORDER BY [process_end_date] ASC, COALESCE([businessId], '') ASC, COALESCE([product_code], '') ASC";

        return array_map([$this, 'normalize'], $this->query->select($sql, $bindings));
    }

    private function contains(string $value): string
    {
        return '%' . str_replace(['\\', '%', '_'], ['\\\\', '\\%', '\\_'], trim($value)) . '%';
    }

    /** @param array<string,mixed> $row */
    private function normalize(array $row): array
    {
        foreach (['minimum_price', 'price_limit', 'purchase_price', 'shipping_fee', 'jingxi_limit_price'] as $field) {
            $row[$field] = $row[$field] === null || $row[$field] === ''
                ? null
                : (float) $row[$field];
        }

        return $row;
    }
}