<?php

namespace MintyPHP\Module\Helpdesk\Repository;

use MintyPHP\DB;
use MintyPHP\Repository\Support\RepoQuery;

class HandoverRepository
{
    /**
     * @param array<string, mixed> $data
     * @return int|null Inserted ID or null on failure
     */
    public function insert(array $data): ?int
    {
        $result = DB::insert(
            'INSERT INTO helpdesk_handovers '
            . '(tenant_id, debitor_no, debitor_name, product_code, status, schema_snapshot, field_values, created_by) '
            . 'VALUES (?, ?, ?, ?, ?, ?, ?, ?)',
            (string) ($data['tenant_id'] ?? 0),
            (string) ($data['debitor_no'] ?? ''),
            (string) ($data['debitor_name'] ?? ''),
            (string) ($data['product_code'] ?? ''),
            (string) ($data['status'] ?? 'draft'),
            $data['schema_snapshot'] ?? null,
            $data['field_values'] ?? null,
            (string) ($data['created_by'] ?? 0)
        );

        if ($result === false) {
            return null;
        }

        return (int) $result;
    }

    public function findById(int $tenantId, int $id): ?array
    {
        if ($id <= 0) {
            return null;
        }

        $row = DB::selectOne(
            'SELECT * FROM helpdesk_handovers WHERE id = ? AND tenant_id = ? LIMIT 1',
            (string) $id,
            (string) $tenantId
        );

        return $this->normalizeRow($row);
    }

    /**
     * @param array<string, mixed> $filters
     * @return array{total: int, rows: list<array<string, mixed>>}
     */
    public function listPaged(int $tenantId, array $filters): array
    {
        $search = trim((string) ($filters['search'] ?? ''));
        $status = trim((string) ($filters['status'] ?? ''));
        $productCode = trim((string) ($filters['product_code'] ?? ''));

        [$limit, $offset] = RepoQuery::sanitizeLimitOffset($filters, 20, 1, 100, 0);
        [$order, $dir] = RepoQuery::sanitizeOrder(
            $filters,
            ['id', 'debitor_name', 'product_code', 'status', 'created_at', 'created_by'],
            'created_at',
            'desc'
        );

        $where = ['h.tenant_id = ?'];
        $params = [(string) $tenantId];

        RepoQuery::addLikeFilter($where, $params, ['h.debitor_name', 'h.debitor_no', 'h.product_code'], $search);

        if ($status !== '' && $status !== 'all') {
            $where[] = 'h.status = ?';
            $params[] = $status;
        }

        if ($productCode !== '') {
            $where[] = 'h.product_code = ?';
            $params[] = $productCode;
        }

        $whereSql = ' WHERE ' . implode(' AND ', $where);
        $total = (int) (DB::selectValue('SELECT COUNT(*) FROM helpdesk_handovers h' . $whereSql, ...$params) ?? 0);

        $rows = DB::select(
            'SELECT h.*, u.display_name AS created_by_name FROM helpdesk_handovers h'
            . ' LEFT JOIN users u ON u.id = h.created_by'
            . $whereSql
            . sprintf(' ORDER BY h.`%s` %s LIMIT ? OFFSET ?', $order, $dir),
            ...array_merge($params, [(string) $limit, (string) $offset])
        );

        $normalized = [];
        if (is_array($rows)) {
            foreach ($rows as $row) {
                $item = $this->normalizeRow($row);
                if ($item !== null) {
                    $normalized[] = $item;
                }
            }
        }

        return [
            'total' => $total,
            'rows' => $normalized,
        ];
    }

    public function updateFieldValues(int $tenantId, int $id, string $fieldValuesJson, int $updatedBy): bool
    {
        $result = DB::update(
            'UPDATE helpdesk_handovers SET field_values = ?, updated_by = ? WHERE id = ? AND tenant_id = ?',
            $fieldValuesJson,
            (string) $updatedBy,
            (string) $id,
            (string) $tenantId
        );

        return $result !== false;
    }

    public function updateStatus(int $tenantId, int $id, string $status, int $updatedBy): bool
    {
        $result = DB::update(
            'UPDATE helpdesk_handovers SET status = ?, updated_by = ? WHERE id = ? AND tenant_id = ?',
            $status,
            (string) $updatedBy,
            (string) $id,
            (string) $tenantId
        );

        return $result !== false;
    }

    private function normalizeRow(mixed $row): ?array
    {
        if (!is_array($row)) {
            return null;
        }
        $item = $row['helpdesk_handovers'] ?? $row;
        if (!is_array($item) || !isset($item['id'])) {
            return null;
        }

        return $item;
    }
}