<?php

declare(strict_types=1);

namespace App\Services;

use App\Models\Event;
use App\Models\Organisation;
use App\Models\RegistrationFieldTemplate;
use App\Models\RegistrationFormField;
use Illuminate\Support\Collection;
use Illuminate\Support\Str;

final class RegistrationFieldTemplateService
{
    public function listForOrganisation(Organisation $organisation): Collection
    {
        return $organisation->registrationFieldTemplates()
            ->ordered()
            ->get();
    }

    public function createTemplate(Organisation $organisation, array $data): RegistrationFieldTemplate
    {
        $data['slug'] = $this->generateUniqueSlug($organisation, $data['label']);

        $template = $organisation->registrationFieldTemplates()->create($data);

        $activityLogger = activity('registration_templates')
            ->performedOn($template)
            ->withProperties(['attributes' => $data]);

        if (auth()->user()) {
            $activityLogger->causedBy(auth()->user());
        }

        $activityLogger->log('registration_template.created');

        return $template;
    }

    public function updateTemplate(RegistrationFieldTemplate $template, array $data): RegistrationFieldTemplate
    {
        $old = $template->toArray();

        if (isset($data['label']) && $data['label'] !== $template->label) {
            $data['slug'] = $this->generateUniqueSlug($template->organisation, $data['label'], $template->id);
        }

        $template->update($data);

        $activityLogger = activity('registration_templates')
            ->performedOn($template)
            ->withProperties(['old' => $old, 'attributes' => $data]);

        if (auth()->user()) {
            $activityLogger->causedBy(auth()->user());
        }

        $activityLogger->log('registration_template.updated');

        return $template->fresh();
    }

    public function deleteTemplate(RegistrationFieldTemplate $template): void
    {
        if ($template->is_system) {
            $template->update(['is_active' => false]);

            $activityLogger = activity('registration_templates')
                ->performedOn($template);

            if (auth()->user()) {
                $activityLogger->causedBy(auth()->user());
            }

            $activityLogger->log('registration_template.deactivated');

            return;
        }

        $activityLogger = activity('registration_templates')
            ->withProperties(['deleted_template' => $template->toArray()]);

        if (auth()->user()) {
            $activityLogger->causedBy(auth()->user());
        }

        $activityLogger->log('registration_template.deleted');

        $template->delete();
    }

    public function createFieldFromTemplate(Event $event, RegistrationFieldTemplate $template): RegistrationFormField
    {
        $slug = $this->generateUniqueFieldSlug($event, $template->label);

        $maxOrder = RegistrationFormField::where('event_id', $event->id)->max('sort_order') ?? -1;

        $field = RegistrationFormField::create([
            'event_id' => $event->id,
            'label' => $template->label,
            'slug' => $slug,
            'field_type' => $template->field_type,
            'options' => $template->options,
            'tag_category' => $template->tag_category,
            'is_required' => $template->is_required,
            'is_portal_visible' => $template->is_portal_visible,
            'is_admin_only' => $template->is_admin_only,
            'is_filterable' => $template->is_filterable,
            'section' => $template->section,
            'help_text' => $template->help_text,
            'sort_order' => $maxOrder + 1,
        ]);

        $activityLogger = activity('registration_fields')
            ->performedOn($field)
            ->withProperties(['from_template_id' => $template->id]);

        if (auth()->user()) {
            $activityLogger->causedBy(auth()->user());
        }

        $activityLogger->log('registration_field.created_from_template');

        return $field;
    }

    /**
     * Seed system templates for a newly created organisation.
     */
    public static function seedSystemTemplates(Organisation $organisation): void
    {
        $templates = [
            ['label' => 'Shirtmaat', 'field_type' => 'select', 'options' => ['XS', 'S', 'M', 'L', 'XL', 'XXL', 'XXXL'], 'is_filterable' => true, 'sort_order' => 1],
            ['label' => 'Dieetwensen', 'field_type' => 'multiselect', 'options' => ['Vegetarisch', 'Veganistisch', 'Halal', 'Glutenvrij', 'Lactosevrij', 'Geen pinda\'s', 'Geen noten'], 'is_filterable' => true, 'sort_order' => 2],
            ['label' => 'Vergoeding', 'field_type' => 'radio', 'options' => ['Pro Deo', 'Entreeticket', 'Vrijwilligersvergoeding'], 'section' => 'Vergoeding', 'sort_order' => 3],
            ['label' => 'Toestemming gegevensverwerking', 'field_type' => 'boolean', 'is_required' => true, 'section' => 'Toestemming', 'help_text' => 'Ik geef toestemming voor de verwerking van mijn persoonsgegevens ten behoeve van de organisatie van dit evenement, conform de Algemene Verordening Gegevensbescherming (AVG).', 'sort_order' => 4],
            ['label' => 'Noodcontact naam', 'field_type' => 'text', 'section' => 'Noodcontact', 'sort_order' => 5],
            ['label' => 'Noodcontact telefoon', 'field_type' => 'text', 'section' => 'Noodcontact', 'sort_order' => 6],
            ['label' => 'EHBO / BHV diploma', 'field_type' => 'boolean', 'is_filterable' => true, 'sort_order' => 7],
            ['label' => 'Rijbewijs', 'field_type' => 'boolean', 'is_filterable' => true, 'sort_order' => 8],
            ['label' => 'Eerder vrijwilliger geweest', 'field_type' => 'boolean', 'is_filterable' => true, 'sort_order' => 9],
            ['label' => 'Certificaten & vaardigheden', 'field_type' => 'tag_picker', 'tag_category' => null, 'is_filterable' => true, 'sort_order' => 10],
            ['label' => 'Opmerkingen', 'field_type' => 'textarea', 'sort_order' => 11],
        ];

        foreach ($templates as $data) {
            $organisation->registrationFieldTemplates()->create([
                ...$data,
                'slug' => Str::slug($data['label']),
                'is_system' => true,
                'is_active' => true,
                'is_required' => $data['is_required'] ?? false,
                'is_filterable' => $data['is_filterable'] ?? false,
                'is_portal_visible' => true,
                'is_admin_only' => false,
            ]);
        }
    }

    private function generateUniqueSlug(Organisation $organisation, string $label, ?string $excludeId = null): string
    {
        $base = Str::slug($label);
        $slug = $base;
        $counter = 1;

        while (true) {
            $query = RegistrationFieldTemplate::where('organisation_id', $organisation->id)
                ->where('slug', $slug);

            if ($excludeId) {
                $query->where('id', '!=', $excludeId);
            }

            if (!$query->exists()) {
                return $slug;
            }

            $counter++;
            $slug = "{$base}-{$counter}";
        }
    }

    private function generateUniqueFieldSlug(Event $event, string $label): string
    {
        $base = Str::slug($label);
        $slug = $base;
        $counter = 1;

        while (RegistrationFormField::where('event_id', $event->id)->where('slug', $slug)->exists()) {
            $counter++;
            $slug = "{$base}-{$counter}";
        }

        return $slug;
    }
}