<?php

declare(strict_types=1);

namespace Tests\Feature\FormBuilder\Bindings;

use App\Models\FormBuilder\FormSchema;
use App\Models\Organisation;
use App\Support\Json\JsonCanonicalizer;
use Illuminate\Foundation\Testing\RefreshDatabaseState;
use Illuminate\Support\Facades\Artisan;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;
use Illuminate\Support\Str;
use Tests\TestCase;

/**
 * Rolls back both WS-5a migrations (drop-columns + create-table), seeds
 * pre-migration JSON into `form_fields.binding` and
 * `form_field_library.default_binding`, then runs the migrations forward
 * and back asserting:
 *
 *   - forward: rows land in form_field_bindings with the correct
 *     owner_type/owner_id + translated columns; legacy JSON columns are
 *     dropped afterwards.
 *   - backward: the rollback pair genuinely reconstructs the JSON shape
 *     before dropping the table.
 *
 * The "roll back both steps" contract is explicitly documented in
 * `2026_04_25_100001_drop_binding_json_columns.php`.
 */
final class FormFieldBindingMigrationTest extends TestCase
{
    // Migration tests run DDL inside the test body (migrate:rollback/migrate);
    // RefreshDatabase wraps tests in a transaction, and DDL on MySQL implicit-
    // commits the surrounding transaction, leaving Laravel unable to ROLLBACK
    // TO SAVEPOINT at end-of-test (1305 SAVEPOINT does not exist). Use
    // migrate:fresh per test for a clean baseline without the txn wrapper.
    //
    // RefreshDatabaseState::$migrated = false forces the NEXT RefreshDatabase
    // test to re-migrate fresh, so any data this test commits doesn't leak.
    protected function setUp(): void
    {
        parent::setUp();
        Artisan::call('migrate:fresh');
        RefreshDatabaseState::$migrated = false;
    }

    public function test_forward_migrations_backfill_rows_from_both_json_sources(): void
    {
        // Roll back to pre-WS-5a state: 3 WS-5d migrations (drop-options-cols,
        // backfill-options, create-options) + 4 WS-5c migrations
        // (drop-conditional-logic-col, backfill-conditional-logic,
        // create-conditional-logic-conditions,
        // create-conditional-logic-groups) + 5 WS-5b migrations
        // (drop-validation-cols, configs-backfill, create-configs,
        // validation-rules-backfill, create-validation-rules) +
        // WS-6 migrations (action-failures, apply-status, retry-attempts,
        // exception-trace, failure-response-code [v1.3-delta D1]) +
        // 2 WS-5a migrations (drop-binding-cols, create-bindings).
        $this->artisan('migrate:rollback', ['--step' => 22])->assertSuccessful();
        $this->assertFalse(Schema::hasTable('form_field_bindings'));
        $this->assertTrue(Schema::hasColumn('form_fields', 'binding'));
        $this->assertTrue(Schema::hasColumn('form_field_library', 'default_binding'));

        [$fieldAId, $fieldCId, $fieldDId] = $this->seedFieldsWithBindingJson();
        [$libAId, $libCId] = $this->seedLibraryWithBindingJson();

        $this->artisan('migrate')->assertSuccessful();

        $this->assertTrue(Schema::hasTable('form_field_bindings'));
        $this->assertFalse(Schema::hasColumn('form_fields', 'binding'));
        $this->assertFalse(Schema::hasColumn('form_field_library', 'default_binding'));

        $rows = DB::table('form_field_bindings')->get();
        $this->assertCount(5, $rows, 'Expected 3 field + 2 library rows');

        $fieldRowA = DB::table('form_field_bindings')
            ->where('owner_type', 'form_field')
            ->where('owner_id', $fieldAId)
            ->first();
        $this->assertSame('person', $fieldRowA->target_entity);
        $this->assertSame('email', $fieldRowA->target_attribute);
        $this->assertSame('entity_owned', $fieldRowA->mode);
        $this->assertNull($fieldRowA->sync_direction);
        $this->assertSame('overwrite', $fieldRowA->merge_strategy);
        $this->assertSame(50, (int) $fieldRowA->trust_level);
        $this->assertSame(0, (int) $fieldRowA->is_identity_key);

        $fieldRowC = DB::table('form_field_bindings')
            ->where('owner_type', 'form_field')
            ->where('owner_id', $fieldCId)
            ->first();
        $this->assertSame('mirrored', $fieldRowC->mode);
        $this->assertSame('write_on_submit', $fieldRowC->sync_direction);
        $this->assertSame('user_profile', $fieldRowC->target_entity);
        $this->assertSame('emergency_contact_name', $fieldRowC->target_attribute);

        $fieldRowD = DB::table('form_field_bindings')
            ->where('owner_type', 'form_field')
            ->where('owner_id', $fieldDId)
            ->first();
        $this->assertSame('entity_owned', $fieldRowD->mode);

        $libRowA = DB::table('form_field_bindings')
            ->where('owner_type', 'form_field_library')
            ->where('owner_id', $libAId)
            ->first();
        $this->assertSame('person', $libRowA->target_entity);
        $this->assertSame('first_name', $libRowA->target_attribute);
        $this->assertSame('entity_owned', $libRowA->mode);

        $libRowC = DB::table('form_field_bindings')
            ->where('owner_type', 'form_field_library')
            ->where('owner_id', $libCId)
            ->first();
        $this->assertSame('mirrored', $libRowC->mode);
    }

    public function test_rollback_reconstructs_json_and_drops_table(): void
    {
        // Walk back the full WS-5d + WS-5c + WS-6 (incl. v1.3-delta D1
        // failure_response_code) + WS-5b + WS-5a stack.
        $this->artisan('migrate:rollback', ['--step' => 22])->assertSuccessful();
        [$fieldAId] = $this->seedFieldsWithBindingJson();
        [$libAId] = $this->seedLibraryWithBindingJson();

        $this->artisan('migrate')->assertSuccessful();

        // Fully-forward state: binding columns gone, rows in form_field_bindings.
        $this->assertFalse(Schema::hasColumn('form_fields', 'binding'));
        $this->assertSame(5, DB::table('form_field_bindings')->count());

        // Step back over WS-5d (3 migrations) + WS-5c (4 migrations) +
        // WS-6 (action-failures, apply-status, retry-attempts, exception-trace,
        // failure-response-code [v1.3-delta D1]) + WS-5b (5 migrations) in one
        // go → restores the pre-WS-5b state (conditional-logic, validation-rules,
        // configs and options tables gone, validation_rules + options JSON
        // columns reappear on source tables; binding contract intact).
        $this->artisan('migrate:rollback', ['--step' => 20])->assertSuccessful();
        $this->assertFalse(Schema::hasTable('form_field_options'));
        $this->assertFalse(Schema::hasTable('form_field_conditional_logic_groups'));
        $this->assertFalse(Schema::hasTable('form_field_conditional_logic_conditions'));
        $this->assertFalse(Schema::hasTable('form_field_validation_rules'));
        $this->assertFalse(Schema::hasTable('form_field_configs'));
        $this->assertTrue(Schema::hasTable('form_field_bindings'));

        // Step back over drop_binding_json_columns → columns reappear empty.
        $this->artisan('migrate:rollback', ['--step' => 1])->assertSuccessful();
        $this->assertTrue(Schema::hasColumn('form_fields', 'binding'));
        $this->assertNull(DB::table('form_fields')->where('id', $fieldAId)->value('binding'));

        // Step back over create_form_field_bindings → JSON reconstructed.
        $this->artisan('migrate:rollback', ['--step' => 1])->assertSuccessful();
        $this->assertFalse(Schema::hasTable('form_field_bindings'));

        // RFC-WS-6 session 2.7: rollback writes JSON directly from
        // migration code (not the canonicalizing service). Compare on
        // canonical form so the assertion is engine-agnostic.
        $field = DB::table('form_fields')->where('id', $fieldAId)->first();
        $this->assertNotNull($field->binding);
        $this->assertSame(
            JsonCanonicalizer::encode([
                'mode' => 'entity_owned',
                'entity' => 'person',
                'column' => 'email',
            ]),
            JsonCanonicalizer::encode(json_decode((string) $field->binding, true)),
        );

        $lib = DB::table('form_field_library')->where('id', $libAId)->first();
        $this->assertNotNull($lib->default_binding);
        $this->assertSame(
            JsonCanonicalizer::encode([
                'mode' => 'entity_owned',
                'entity' => 'person',
                'column' => 'first_name',
            ]),
            JsonCanonicalizer::encode(json_decode((string) $lib->default_binding, true)),
        );
    }

    /** @return array{0:string,1:string,2:string} */
    private function seedFieldsWithBindingJson(): array
    {
        $org = Organisation::factory()->create();
        $schema = FormSchema::factory()->create(['organisation_id' => $org->id]);

        $fieldA = (string) Str::ulid();
        $fieldC = (string) Str::ulid();
        $fieldD = (string) Str::ulid();

        DB::table('form_fields')->insert([
            [
                'id' => $fieldA,
                'form_schema_id' => $schema->id,
                'field_type' => 'EMAIL',
                'slug' => 'email',
                'label' => 'E-mail',
                'binding' => json_encode(['mode' => 'entity_owned', 'entity' => 'person', 'column' => 'email']),
                'value_storage_hint' => 'indexed',
                'sort_order' => 0,
                'created_at' => now(),
                'updated_at' => now(),
            ],
            [
                'id' => $fieldC,
                'form_schema_id' => $schema->id,
                'field_type' => 'TEXT',
                'slug' => 'noodcontact',
                'label' => 'Noodcontact',
                'binding' => json_encode([
                    'mode' => 'mirrored',
                    'entity' => 'user_profile',
                    'column' => 'emergency_contact_name',
                    'sync_direction' => 'write_on_submit',
                ]),
                'value_storage_hint' => 'indexed',
                'sort_order' => 1,
                'created_at' => now(),
                'updated_at' => now(),
            ],
            [
                'id' => $fieldD,
                'form_schema_id' => $schema->id,
                'field_type' => 'TEXT',
                'slug' => 'voornaam',
                'label' => 'Voornaam',
                'binding' => json_encode(['mode' => 'entity_owned', 'entity' => 'person', 'column' => 'first_name']),
                'value_storage_hint' => 'indexed',
                'sort_order' => 2,
                'created_at' => now(),
                'updated_at' => now(),
            ],
        ]);

        return [$fieldA, $fieldC, $fieldD];
    }

    /** @return array{0:string,1:string} */
    private function seedLibraryWithBindingJson(): array
    {
        $org = Organisation::factory()->create();

        $libA = (string) Str::ulid();
        $libC = (string) Str::ulid();

        DB::table('form_field_library')->insert([
            [
                'id' => $libA,
                'organisation_id' => $org->id,
                'name' => 'Voornaam bibliotheek',
                'slug' => 'voornaam-lib',
                'field_type' => 'TEXT',
                'label' => 'Voornaam',
                'default_binding' => json_encode(['mode' => 'entity_owned', 'entity' => 'person', 'column' => 'first_name']),
                'default_is_required' => false,
                'default_is_filterable' => false,
                'usage_count' => 0,
                'is_system' => false,
                'is_active' => true,
                'created_at' => now(),
                'updated_at' => now(),
            ],
            [
                'id' => $libC,
                'organisation_id' => $org->id,
                'name' => 'Noodcontact bibliotheek',
                'slug' => 'noodcontact-lib',
                'field_type' => 'TEXT',
                'label' => 'Noodcontact',
                'default_binding' => json_encode([
                    'mode' => 'mirrored',
                    'entity' => 'user_profile',
                    'column' => 'emergency_contact_phone',
                    'sync_direction' => 'write_on_submit',
                ]),
                'default_is_required' => false,
                'default_is_filterable' => false,
                'usage_count' => 0,
                'is_system' => false,
                'is_active' => true,
                'created_at' => now(),
                'updated_at' => now(),
            ],
        ]);

        return [$libA, $libC];
    }
}