<?php

declare(strict_types=1);

namespace App\Models\FormBuilder;

use App\Enums\FormBuilder\FormFieldDisplayWidth;
use App\Enums\FormBuilder\FormValueStorageHint;
use App\Models\Scopes\OrganisationScope;
use Illuminate\Database\Eloquent\Concerns\HasUlids;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\Relations\MorphMany;
use Illuminate\Database\Eloquent\SoftDeletes;

/**
 * Activity log strategy: explicit calls via logFieldChange() — no LogsActivity
 * trait. Logged events: create/delete/restore, field_type change, binding
 * change, is_pii/is_filterable toggle, structural options change.
 * See ARCH-FORM-BUILDER.md §17.1 and S1 Phase 4b.
 *
 * field_type is stored as string (not DB enum) so CustomFieldTypeRegistry
 * (ARCH §17.2) can extend it at runtime.
 */
final class FormField extends Model
{
    use HasFactory;
    use HasUlids;
    use SoftDeletes;

    protected static function booted(): void
    {
        static::addGlobalScope(new OrganisationScope());
    }

    /** @return array{via: class-string, fk: string} */
    public static function tenantScopeStrategy(): array
    {
        return ['via' => FormSchema::class, 'fk' => 'form_schema_id'];
    }

    protected $fillable = [
        'form_schema_id',
        'form_schema_section_id',
        'library_field_id',
        'field_type',
        'slug',
        'label',
        'help_text',
        'section',
        'options',
        'is_required',
        'is_filterable',
        'is_portal_visible',
        'is_admin_only',
        'is_unique',
        'is_pii',
        'display_width',
        'role_restrictions',
        'translations',
        'value_storage_hint',
        'review_required',
        'sort_order',
    ];

    /** @var array<string, string> */
    protected $casts = [
        'options' => 'array',
        'role_restrictions' => 'array',
        'translations' => 'array',
        'is_required' => 'bool',
        'is_filterable' => 'bool',
        'is_portal_visible' => 'bool',
        'is_admin_only' => 'bool',
        'is_unique' => 'bool',
        'is_pii' => 'bool',
        'review_required' => 'bool',
        'display_width' => FormFieldDisplayWidth::class,
        'value_storage_hint' => FormValueStorageHint::class,
        'sort_order' => 'int',
    ];

    public function schema(): BelongsTo
    {
        return $this->belongsTo(FormSchema::class, 'form_schema_id');
    }

    public function section(): BelongsTo
    {
        return $this->belongsTo(FormSchemaSection::class, 'form_schema_section_id');
    }

    public function libraryField(): BelongsTo
    {
        return $this->belongsTo(FormFieldLibrary::class, 'library_field_id');
    }

    public function values(): HasMany
    {
        return $this->hasMany(FormValue::class);
    }

    public function bindings(): MorphMany
    {
        return $this->morphMany(FormFieldBinding::class, 'owner');
    }

    public function validationRules(): MorphMany
    {
        return $this->morphMany(FormFieldValidationRule::class, 'owner');
    }

    public function configs(): MorphMany
    {
        return $this->morphMany(FormFieldConfig::class, 'owner');
    }

    public function conditionalLogicGroups(): HasMany
    {
        return $this->hasMany(FormFieldConditionalLogicGroup::class, 'form_field_id');
    }

    /**
     * The tree root: the group with `parent_group_id IS NULL`. Fields
     * without any conditional logic return null. Only one root is
     * supported per field — enforced by the service layer's `replaceLogic`.
     */
    public function rootConditionalLogicGroup(): ?FormFieldConditionalLogicGroup
    {
        return $this->conditionalLogicGroups()
            ->whereNull('parent_group_id')
            ->first();
    }

    /**
     * Nuanced activity log (ARCH §17.1; S1 Phase 4b). Callers choose which
     * events are worth logging — e.g. created/deleted/restored, field_type
     * changed (value storage changes), binding changed, is_pii toggled,
     * is_filterable toggled (triggers backfill), structural options changes.
     * Conditional-logic changes emit `field.conditional_logic_replaced`
     * via FormFieldConditionalLogicService (ARCH §8; WS-5c commit 2).
     * NOT logged (noise): label/help_text/sort_order/translations.
     *
     * Bulk-fixture suppression: the activitylog.enabled config key is the
     * kill-switch. Seeders and one-shot commands wrap themselves in
     * App\Support\ActivityLog::suppressed(...). activity()->log() becomes
     * a silent no-op while disabled, so no guard is needed here.
     *
     * @param  array<string, mixed>  $properties
     */
    public function logFieldChange(string $event, array $properties = []): void
    {
        activity()
            ->performedOn($this)
            ->withProperties($properties)
            ->log($event);
    }
}