<?php

namespace App\Database\Migrations;

use CodeIgniter\Database\Migration;

class AddAcademicStatisticsNavItem extends Migration
{
    private string $url = 'administrator/stats';

    public function up(): void
    {
        if (! $this->db->tableExists('nav_items')) {
            return;
        }

        $existing = $this->db->table('nav_items')->where('url', $this->url)->get()->getRowArray();
        if ($existing !== null) {
            return;
        }

        $parentColumn = $this->parentColumn();
        $parentBuilder = $this->db->table('nav_items')->where('label', 'Student-Affairs');
        if ($parentColumn !== null) {
            $parentBuilder->where($parentColumn, null);
        }
        $parent = $parentBuilder->get()->getRowArray();

        $insert = [
            'label' => 'School Statistics',
            'url' => $this->url,
            'sort_order' => 14,
            'is_enabled' => 1,
            'created_at' => date('Y-m-d H:i:s'),
        ];
        if ($parentColumn !== null) {
            $insert[$parentColumn] = $parent['id'] ?? null;
        }

        $this->db->table('nav_items')->insert($insert);
        $navItemId = (int) $this->db->insertID();
        $this->grantToRoles($navItemId, ['administrator', 'admin', 'principal', 'vice_principal', 'administrative staff', 'head of department (education)']);
    }

    public function down(): void
    {
        if (! $this->db->tableExists('nav_items')) {
            return;
        }

        $row = $this->db->table('nav_items')->where('url', $this->url)->get()->getRowArray();
        if ($row === null) {
            return;
        }

        if ($this->db->tableExists('role_nav_items')) {
            $this->db->table('role_nav_items')->where('nav_item_id', (int) $row['id'])->delete();
        }
        $this->db->table('nav_items')->where('id', (int) $row['id'])->delete();
    }

    private function grantToRoles(int $navItemId, array $roles): void
    {
        if ($navItemId <= 0 || ! $this->db->tableExists('role_nav_items')) {
            return;
        }

        foreach ($roles as $role) {
            $insert = ['nav_item_id' => $navItemId, 'created_at' => date('Y-m-d H:i:s')];
            if ($this->db->fieldExists('role_id', 'role_nav_items') && $this->db->tableExists('roles')) {
                $roleRow = $this->db->table('roles')->select('id')->where('LOWER(name)', strtolower($role))->get()->getRowArray();
                if ($roleRow === null) {
                    continue;
                }
                $insert['role_id'] = (int) $roleRow['id'];
            } elseif ($this->db->fieldExists('role', 'role_nav_items')) {
                $insert['role'] = $role;
            } else {
                continue;
            }
            $this->db->table('role_nav_items')->insert($insert);
        }
    }

    private function parentColumn(): ?string
    {
        if ($this->db->fieldExists('parent_id', 'nav_items')) {
            return 'parent_id';
        }
        return $this->db->fieldExists('menu_parent_id', 'nav_items') ? 'menu_parent_id' : null;
    }
}