<?php

declare(strict_types=1);

namespace Tests\Feature\FormBuilder\ConditionalLogic;

use App\Models\FormBuilder\FormField;
use App\Models\FormBuilder\FormSchema;
use App\Models\Organisation;
use App\Models\User;
use App\Services\FormBuilder\FormFieldConditionalLogicService;
use App\Services\FormBuilder\FormFieldService;
use App\Support\Json\JsonCanonicalizer;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Spatie\Activitylog\Models\Activity;
use Tests\TestCase;

/**
 * ARCH §8.6 dual-event contract on logic changes:
 *   - `field.updated` with `old.conditional_logic` / `new.conditional_logic`
 *     in the properties payload (shapes via `toJsonShape`).
 *   - `field.conditional_logic_replaced` from inside `replaceLogic()`.
 *
 * Both rows must share the same causer and emit only when the tree
 * actually changed — bare label-only updates must NOT carry a
 * `conditional_logic` key in the payload, and must NOT emit a
 * `field.conditional_logic_replaced` row.
 */
final class ConditionalLogicActivityLogPayloadTest extends TestCase
{
    use RefreshDatabase;

    public function test_field_updated_activity_log_contains_conditional_logic_diff_when_tree_changes(): void
    {
        $org = Organisation::factory()->create();
        $schema = FormSchema::factory()->create(['organisation_id' => $org->id]);
        FormField::factory()->create(['form_schema_id' => $schema->id, 'slug' => 'gate']);
        FormField::factory()->create(['form_schema_id' => $schema->id, 'slug' => 'region']);

        $field = FormField::factory()
            ->withConditionalLogic([
                'operator' => 'all',
                'children' => [
                    ['field_slug' => 'gate', 'operator' => 'equals', 'value' => 'yes'],
                    ['field_slug' => 'region', 'operator' => 'equals', 'value' => 'NL'],
                ],
            ])
            ->create(['form_schema_id' => $schema->id, 'slug' => 'subject']);

        $logicService = app(FormFieldConditionalLogicService::class);
        $oldShape = $logicService->toJsonShape($field->fresh()->rootConditionalLogicGroup());

        $causer = User::factory()->create();
        $this->actingAs($causer);
        Activity::query()->delete();

        // Replace the tree with a different shape — single condition, ANY group.
        app(FormFieldService::class)->update($field->fresh(), [
            'conditional_logic' => [
                'show_when' => [
                    'any' => [
                        ['field_slug' => 'gate', 'operator' => 'not_empty'],
                    ],
                ],
            ],
        ]);

        $newShape = $logicService->toJsonShape($field->fresh()->rootConditionalLogicGroup());
        $this->assertNotEquals($oldShape, $newShape, 'precondition: tree must have changed');

        $updated = Activity::query()
            ->where('subject_type', $field->getMorphClass())
            ->where('subject_id', $field->id)
            ->where('description', 'field.updated')
            ->first();
        $this->assertNotNull($updated, 'field.updated row must exist');

        $properties = $updated->properties;
        // RFC-WS-6 session 2.7: canonicalized writes give byte-stable
        // round-trip; both sides go through JsonCanonicalizer::encode so
        // assertSame compares bytes regardless of MySQL key-order
        // normalization on the JSON column read.
        $this->assertSame(
            JsonCanonicalizer::encode($oldShape),
            JsonCanonicalizer::encode($properties->get('old')['conditional_logic'] ?? null),
        );
        $this->assertSame(
            JsonCanonicalizer::encode($newShape),
            JsonCanonicalizer::encode($properties->get('new')['conditional_logic'] ?? null),
        );

        $semantic = Activity::query()
            ->where('subject_type', $field->getMorphClass())
            ->where('subject_id', $field->id)
            ->where('description', 'field.conditional_logic_replaced')
            ->first();
        $this->assertNotNull($semantic, 'semantic event must exist');

        $this->assertSame((int) $causer->id, (int) $updated->causer_id);
        $this->assertSame((int) $causer->id, (int) $semantic->causer_id);
    }

    public function test_field_updated_without_logic_change_does_not_emit_conditional_logic_diff(): void
    {
        $org = Organisation::factory()->create();
        $schema = FormSchema::factory()->create(['organisation_id' => $org->id]);
        FormField::factory()->create(['form_schema_id' => $schema->id, 'slug' => 'gate']);

        $field = FormField::factory()
            ->withConditionalLogic([
                'operator' => 'all',
                'children' => [
                    ['field_slug' => 'gate', 'operator' => 'equals', 'value' => 'yes'],
                ],
            ])
            ->create(['form_schema_id' => $schema->id, 'slug' => 'subject', 'label' => 'Old label']);

        $causer = User::factory()->create();
        $this->actingAs($causer);
        Activity::query()->delete();

        app(FormFieldService::class)->update($field->fresh(), [
            'label' => 'New label',
        ]);

        $updated = Activity::query()
            ->where('subject_type', $field->getMorphClass())
            ->where('subject_id', $field->id)
            ->where('description', 'field.updated')
            ->first();
        $this->assertNotNull($updated, 'field.updated row must exist for the label change');

        $properties = $updated->properties;
        $this->assertArrayNotHasKey(
            'conditional_logic',
            $properties->get('old') ?? [],
            'old payload must not include conditional_logic when tree did not change',
        );
        $this->assertArrayNotHasKey(
            'conditional_logic',
            $properties->get('new') ?? [],
            'new payload must not include conditional_logic when tree did not change',
        );

        $semantic = Activity::query()
            ->where('subject_type', $field->getMorphClass())
            ->where('subject_id', $field->id)
            ->where('description', 'field.conditional_logic_replaced')
            ->first();
        $this->assertNull($semantic, 'no semantic event when tree did not change');
    }
}