<?php

namespace App\Business\KukaPostingQuotation;

use Illuminate\Http\Request;
use Illuminate\Pagination\LengthAwarePaginator;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;
use Throwable;

class KukaPostingQuotationPageData
{
    /**
     * @return array<string,mixed>
     */
    public function build(Request $request, int $companyId): array
    {
        $fields = array_values((array) config('kuka_posting.quotation_fields', []));
        $perPage = (int) $request->integer('per_page', 50);
        if (! in_array($perPage, [50, 100, 200], true)) {
            $perPage = 50;
        }
        $page = max(1, (int) $request->integer('page', 1));
        $keyword = mb_substr(trim((string) $request->query('keyword', '')), 0, 120);
        $status = mb_substr(trim((string) $request->query('status', '')), 0, 64);
        $empty = new LengthAwarePaginator([], 0, $perPage, $page, [
            'path' => $request->url(),
            'query' => $request->query(),
        ]);

        if ($fields === []) {
            return $this->result($empty, [], $keyword, $status, $perPage, '顾家报价单字段配置不完整。');
        }

        $connectionName = (string) config('upstream_mirrors.connection', 'business_mirror');
        $schema = Schema::connection($connectionName);
        if (! $schema->hasTable('kuka_posting_quotation_rows')
            || ! $schema->hasTable('kuka_posting_quotation_imports')) {
            return $this->result($empty, $fields, $keyword, $status, $perPage, '顾家报价单镜像尚未建立，请先执行数据库迁移和报价单导入。');
        }

        try {
            $connection = DB::connection($connectionName);
            $import = $connection->table('kuka_posting_quotation_imports')
                ->where('company_id', $companyId)
                ->first();
            $statuses = $connection->table('kuka_posting_quotation_rows')
                ->where('company_id', $companyId)
                ->whereNotNull('record_status')
                ->where('record_status', '!=', '')
                ->distinct()
                ->orderBy('record_status')
                ->pluck('record_status')
                ->map(static fn (mixed $value): string => (string) $value)
                ->all();
            if ($status !== '' && ! in_array($status, $statuses, true)) {
                $status = '';
            }

            $query = $connection->table('kuka_posting_quotation_rows')
                ->where('company_id', $companyId);
            if ($keyword !== '') {
                $like = '%' . addcslashes($keyword, '\\%_') . '%';
                $query->where(static function ($nested) use ($like): void {
                    $nested->where('material_number', 'like', $like)
                        ->orWhere('material_desc', 'like', $like)
                        ->orWhere('supplier_account', 'like', $like)
                        ->orWhere('supplier_name', 'like', $like);
                });
            }
            if ($status !== '') {
                $query->where('record_status', $status);
            }

            $rows = $query
                ->orderBy('material_number')
                ->paginate($perPage, ['*'], 'page', $page)
                ->withQueryString();
            $rows->setCollection($rows->getCollection()->map(static function (object $row): object {
                $values = json_decode((string) $row->source_values, true);

                return (object) (is_array($values) ? $values : []);
            }));

            $range = $connection->table('kuka_posting_quotation_rows')
                ->where('company_id', $companyId)
                ->selectRaw('MIN(price_valid_date) as min_valid, MAX(price_expiry_date) as max_expiry')
                ->first();
            $statusCounts = json_decode((string) ($import->status_counts ?? ''), true);

            return $this->result(
                $rows,
                $fields,
                $keyword,
                $status,
                $perPage,
                null,
                [
                    'rows' => (int) ($import->row_count ?? 0),
                    'materials' => (int) ($import->material_count ?? 0),
                    'statuses' => is_array($statusCounts) ? $statusCounts : [],
                    'valid_from' => $range->min_valid ?? null,
                    'valid_to' => $range->max_expiry ?? null,
                    'file_name' => (string) ($import->file_name ?? ''),
                    'file_sha256' => (string) ($import->file_sha256 ?? ''),
                    'source_sheet' => (string) ($import->source_sheet ?? ''),
                    'completed_at' => (string) ($import->completed_at ?? ''),
                ],
                $statuses,
            );
        } catch (Throwable $exception) {
            report($exception);

            return $this->result(
                $empty,
                $fields,
                $keyword,
                $status,
                $perPage,
                '顾家报价单暂时无法读取，请稍后重试；这不代表报价数据为 0。',
            );
        }
    }

    /**
     * @param  list<array<string,mixed>>  $fields
     * @param  list<string>  $statuses
     * @param  array<string,mixed>  $import
     * @return array<string,mixed>
     */
    private function result(
        LengthAwarePaginator $rows,
        array $fields,
        string $keyword,
        string $status,
        int $perPage,
        ?string $error,
        array $import = [],
        array $statuses = [],
    ): array {
        $directoryFields = array_map(static fn (array $field): array => [
            'name' => (string) $field['name'],
            'source' => (string) $field['name'],
            'label' => (string) $field['label'],
            'kind' => (string) ($field['kind'] ?? 'text'),
            'tones' => (array) ($field['tones'] ?? []),
        ], $fields);

        return [
            'directory' => [
                'title' => '顾家报价单 · 价格明细',
                'icon' => 'request_quote',
                'status' => '顾家报价单',
                'description' => '顾家 SRM 报价数据原始字段；当前数据集共 '
                    . number_format((int) ($import['rows'] ?? 0)) . ' 条，物料编码唯一。',
                'empty' => '顾家报价单尚未导入。',
                'fields' => $directoryFields,
            ],
            'rows' => $rows,
            'filters' => [
                'keyword' => $keyword,
                'status' => $status,
                'per_page' => $perPage,
            ],
            'statuses' => $statuses,
            'import' => $import,
            'summary' => [
                'filtered_rows' => $rows->total(),
                'rows' => (int) ($import['rows'] ?? 0),
                'materials' => (int) ($import['materials'] ?? 0),
                'valid_from' => $import['valid_from'] ?? null,
                'valid_to' => $import['valid_to'] ?? null,
                'completed_at' => $import['completed_at'] ?? null,
            ],
            'error' => $error,
        ];
    }
}