<?php

namespace Modules\EcommerceFinance\Repositories;

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

/**
 * Supplier product pricing and repricing records from JianSun.
 */
class ProductPriceRepository
{
    private const SOURCE = 'jiansun';
    private const TABLE = '[dbo].[aaronprice]';

    private const PRICE_TYPES = [
        'pricing' => '定价',
        'repricing' => '变价',
    ];

    private const COST_REDUCTION = [
        'yes' => '是',
        'no' => '否',
    ];

    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[] = "[条形码] LIKE ? ESCAPE '\\'";
            $bindings[] = $this->contains((string) $filters['barcode']);
        }

        $priceType = self::PRICE_TYPES[(string) ($filters['price_type'] ?? '')] ?? null;

        if ($priceType !== null) {
            $where[] = '[价格类型] = ?';
            $bindings[] = $priceType;
        }

        $costReduction = self::COST_REDUCTION[(string) ($filters['cost_reduction'] ?? '')] ?? null;

        if ($costReduction !== null) {
            $where[] = '[是否采购降本] = ?';
            $bindings[] = $costReduction;
        }

        if (($filters['effective_from'] ?? '') !== '') {
            $where[] = 'TRY_CONVERT(date, [生效开始时间]) >= ?';
            $bindings[] = (string) $filters['effective_from'];
        }

        if (($filters['effective_to'] ?? '') !== '') {
            $where[] = 'TRY_CONVERT(date, [生效开始时间]) <= ?';
            $bindings[] = (string) $filters['effective_to'];
        }

        $whereSql = $where === [] ? '' : ' WHERE ' . implode(' AND ', $where);
        $offset = ($page - 1) * $limit;
        $fetch = $limit + 1;
        $sql = 'SELECT '
            . '[条形码] AS barcode, '
            . '[价格类型] AS price_type, '
            . '[变价类型] AS change_type, '
            . '[是否采购降本] AS cost_reduction, '
            . 'TRY_CONVERT(decimal(18,2), NULLIF([变价前价格], \'\')) AS price_before, '
            . 'TRY_CONVERT(decimal(18,2), NULLIF([变价后价格], \'\')) AS price_after, '
            . 'TRY_CONVERT(decimal(18,2), NULLIF([差价], \'\')) AS price_diff, '
            . '[申请人] AS applicant, '
            . '[备注] AS remark, '
            . 'CONVERT(varchar(19), TRY_CONVERT(datetime2, [生效开始时间]), 120) AS effective_start, '
            . 'CONVERT(varchar(19), TRY_CONVERT(datetime2, [生效结束时间]), 120) AS effective_end, '
            . 'CONVERT(varchar(19), TRY_CONVERT(datetime2, [流程完成时间]), 120) AS completed_at '
            . 'FROM ' . self::TABLE
            . $whereSql
            . ' ORDER BY TRY_CONVERT(datetime2, [流程完成时间]) DESC, [条形码] ASC'
            . " OFFSET {$offset} ROWS FETCH NEXT {$fetch} ROWS ONLY";

        return ['rows' => 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 (['price_before', 'price_after', 'price_diff'] as $field) {
            $row[$field] = $row[$field] === null || $row[$field] === ''
                ? null
                : (float) $row[$field];
        }

        return $row;
    }
}