<?php

namespace MintyPHP\Module\Helpdesk\Service;

/**
 * Service for searching BC debtors via OData.
 */
class DebitorSearchService
{
    public const MIN_QUERY_LENGTH = 2;

    public function __construct(
        private readonly BcODataGateway $bcODataGateway,
        private readonly EffectiveHelpdeskSettingsService $settingsGateway
    ) {
    }

    /**
     * Search debtors by name or number.
     *
     * @return array{status: string, results: array<int, array<string, mixed>>, error?: string}
     */
    public function search(string $query): array
    {
        $query = trim($query);

        if ($query === '') {
            return ['status' => 'empty', 'results' => []];
        }

        if (mb_strlen($query) < self::MIN_QUERY_LENGTH) {
            return ['status' => 'too_short', 'results' => []];
        }

        if (!$this->settingsGateway->isConfigured()) {
            return ['status' => 'not_configured', 'results' => [], 'error' => 'BC connection not configured'];
        }

        try {
            $results = $this->bcODataGateway->searchCustomers($query);
        } catch (\Throwable $e) {
            return ['status' => 'error', 'results' => [], 'error' => 'BC connection failed'];
        }

        if ($results === []) {
            return ['status' => 'no_results', 'results' => []];
        }

        return ['status' => 'success', 'results' => $results];
    }

    /**
     * Build grid data for the helpdesk debtor list.
     *
     * @param array<string,mixed> $filters
     * @return array{status: string, rows: array<int, array<string, mixed>>, total: int, error?: string}
     */
    public function listForGrid(array $filters): array
    {
        if (!$this->settingsGateway->isConfigured()) {
            return [
                'status' => 'not_configured',
                'rows' => [],
                'total' => 0,
                'error' => 'BC connection not configured',
            ];
        }

        $search = trim((string) ($filters['search'] ?? ''));
        $city = trim((string) ($filters['city'] ?? ''));
        $limit = (int) ($filters['limit'] ?? 10);
        $offset = (int) ($filters['offset'] ?? 0);
        $order = (string) ($filters['order'] ?? 'Name');
        $dir = (string) ($filters['dir'] ?? 'asc');

        if ($limit < 1) {
            $limit = 1;
        } elseif ($limit > 100) {
            $limit = 100;
        }
        if ($offset < 0) {
            $offset = 0;
        }

        try {
            $result = $this->bcODataGateway->listCustomers($search, $city, $limit, $offset, $order, $dir);
        } catch (\Throwable) {
            return [
                'status' => 'error',
                'rows' => [],
                'total' => 0,
                'error' => 'BC connection failed',
            ];
        }

        return [
            'status' => 'success',
            'rows' => (array) $result['rows'],
            'total' => max(0, (int) $result['total']),
        ];
    }
}