<?php

declare(strict_types=1);

namespace Tests\Feature\FormBuilder\ValidationRules;

use App\Models\FormBuilder\FormSchema;
use App\Models\Organisation;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;
use Illuminate\Support\Str;
use Tests\TestCase;

/**
 * Rolls back the WS-5b commit 1+2 migrations, seeds pre-WS-5b JSON, then
 * runs the migrations forward and back asserting:
 *
 *   - Forward: canonical rows land in form_field_validation_rules with
 *     the correct field-type dispatch for legacy `min`/`max` ambiguity
 *     and `max_priorities` canonicalised to `max_selected`.
 *   - Forward: `tag_categories` / `storage_disk` are skipped (handled by
 *     commit 5's configs backfill).
 *   - Rollback: the rows are serialised back into the JSON column using
 *     canonical keys. `required` / `unique` keys are not reconstructed
 *     (never migrated).
 */
final class FormFieldValidationRuleBackfillTest extends TestCase
{
    use RefreshDatabase;

    public function test_forward_migration_backfills_rows_with_field_type_dispatch(): void
    {
        // Roll back: 2 WS-5d migrations (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-cols + configs-backfill + create-configs +
        // validation-rules-backfill + create-validation-rules) = 11.
        // Brings us to the pre-WS-5b state: validation_rules JSON column
        // present, no relational tables for WS-5b/c/d.
        $this->artisan('migrate:rollback', ['--step' => 11])->assertSuccessful();
        $this->assertFalse(Schema::hasTable('form_field_validation_rules'));
        $this->assertTrue(Schema::hasColumn('form_fields', 'validation_rules'));

        [$numberId, $textId, $dateId, $sectionPriorityId] = $this->seedFields();
        [$libAId] = $this->seedLibrary();

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

        $this->assertTrue(Schema::hasTable('form_field_validation_rules'));

        $numberRules = DB::table('form_field_validation_rules')
            ->where('owner_type', 'form_field')
            ->where('owner_id', $numberId)
            ->get()->keyBy('rule_type');
        $this->assertTrue($numberRules->has('min_value'));
        $this->assertTrue($numberRules->has('max_value'));
        $this->assertSame(16, json_decode((string) $numberRules['min_value']->parameters, true)['value']);
        $this->assertSame(99, json_decode((string) $numberRules['max_value']->parameters, true)['value']);

        $textRules = DB::table('form_field_validation_rules')
            ->where('owner_type', 'form_field')
            ->where('owner_id', $textId)
            ->get()->keyBy('rule_type');
        $this->assertTrue($textRules->has('min_length'));
        $this->assertTrue($textRules->has('max_length'));
        $this->assertSame(5, json_decode((string) $textRules['min_length']->parameters, true)['value']);
        $this->assertSame(80, json_decode((string) $textRules['max_length']->parameters, true)['value']);

        $dateRules = DB::table('form_field_validation_rules')
            ->where('owner_type', 'form_field')
            ->where('owner_id', $dateId)
            ->get()->keyBy('rule_type');
        $this->assertTrue($dateRules->has('date_min'));
        $this->assertSame('2026-01-01', json_decode((string) $dateRules['date_min']->parameters, true)['date']);

        $sectionRules = DB::table('form_field_validation_rules')
            ->where('owner_type', 'form_field')
            ->where('owner_id', $sectionPriorityId)
            ->get()->keyBy('rule_type');
        $this->assertTrue($sectionRules->has('max_selected'), 'max_priorities should canonicalise to max_selected');
        $this->assertSame(3, json_decode((string) $sectionRules['max_selected']->parameters, true)['value']);
        $this->assertFalse($sectionRules->has('max_priorities'), 'legacy key must not survive');

        $libRules = DB::table('form_field_validation_rules')
            ->where('owner_type', 'form_field_library')
            ->where('owner_id', $libAId)
            ->get()->keyBy('rule_type');
        $this->assertTrue($libRules->has('regex'));
        $this->assertSame(
            '/^[A-Z]{3}$/',
            json_decode((string) $libRules['regex']->parameters, true)['pattern'],
        );
    }

    public function test_tag_categories_and_storage_disk_skipped_for_commit_5(): void
    {
        // Roll back all WS-5b migrations to reach the pre-WS-5b state
        // (validation_rules JSON column present; no relational tables for
        // WS-5b). Step count: drop-cols + configs-backfill + create-configs
        // + validation-rules-backfill + create-validation-rules = 5.
        $this->artisan('migrate:rollback', ['--step' => 11])->assertSuccessful();

        $fieldId = $this->seedFieldWithJson([
            'field_type' => 'TAG_PICKER',
            'validation_rules' => [
                'tag_categories' => ['Veiligheid'],
                'storage_disk' => 'local',
            ],
        ]);

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

        $rows = DB::table('form_field_validation_rules')
            ->where('owner_id', $fieldId)
            ->get();
        $this->assertCount(0, $rows, 'configs keys must not land in the validation-rules table');
    }

    public function test_required_and_unique_skipped_with_warn(): void
    {
        // Roll back all WS-5b migrations to reach the pre-WS-5b state
        // (validation_rules JSON column present; no relational tables for
        // WS-5b). Step count: drop-cols + configs-backfill + create-configs
        // + validation-rules-backfill + create-validation-rules = 5.
        $this->artisan('migrate:rollback', ['--step' => 11])->assertSuccessful();

        $fieldId = $this->seedFieldWithJson([
            'field_type' => 'TEXT',
            'validation_rules' => [
                'required' => true,
                'unique' => true,
                'min' => 2,
            ],
        ]);

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

        $rows = DB::table('form_field_validation_rules')
            ->where('owner_id', $fieldId)
            ->pluck('rule_type')
            ->all();
        sort($rows);
        $this->assertSame(['min_length'], $rows, 'only min_length should land (required/unique skipped)');
    }

    public function test_unknown_top_level_key_fails_migration(): void
    {
        // Roll back all WS-5b migrations to reach the pre-WS-5b state
        // (validation_rules JSON column present; no relational tables for
        // WS-5b). Step count: drop-cols + configs-backfill + create-configs
        // + validation-rules-backfill + create-validation-rules = 5.
        $this->artisan('migrate:rollback', ['--step' => 11])->assertSuccessful();

        $this->seedFieldWithJson([
            'field_type' => 'TEXT',
            'validation_rules' => ['nonsense_key' => 42],
        ]);

        $this->expectException(\RuntimeException::class);
        $this->artisan('migrate');
    }

    public function test_unmapped_field_type_for_min_max_fails_migration(): void
    {
        // Roll back all WS-5b migrations to reach the pre-WS-5b state
        // (validation_rules JSON column present; no relational tables for
        // WS-5b). Step count: drop-cols + configs-backfill + create-configs
        // + validation-rules-backfill + create-validation-rules = 5.
        $this->artisan('migrate:rollback', ['--step' => 11])->assertSuccessful();

        $this->seedFieldWithJson([
            'field_type' => 'BOOLEAN',
            'validation_rules' => ['min' => 1],
        ]);

        $this->expectException(\RuntimeException::class);
        $this->artisan('migrate');
    }

    public function test_full_wsb_rollback_reconstructs_source_state(): void
    {
        // Architect contract: "the forward+back pair is safe when run as a
        // unit; a partial 'rollback this migration but not its create-table
        // sibling' state is not supported." This test exercises the
        // full-back-then-full-forward cycle — rolling back all WS-5b
        // migrations restores the pre-WS-5b state (columns present on
        // source tables; validation rules relational table gone).
        $this->artisan('migrate:rollback', ['--step' => 11])->assertSuccessful();
        [$numberId] = $this->seedFields();

        $this->artisan('migrate')->assertSuccessful();
        // Post-migration: rows exist, column dropped.
        $this->assertSame(
            2,
            DB::table('form_field_validation_rules')
                ->where('owner_id', $numberId)
                ->count(),
        );
        $this->assertFalse(Schema::hasColumn('form_fields', 'validation_rules'));

        // Roll back WS-5b fully → column reappears and carries canonical JSON
        // reconstructed from the relational rows.
        $this->artisan('migrate:rollback', ['--step' => 11])->assertSuccessful();
        $this->assertTrue(Schema::hasColumn('form_fields', 'validation_rules'));

        $field = DB::table('form_fields')->where('id', $numberId)->first();
        $decoded = json_decode((string) $field->validation_rules, true);
        $this->assertSame(16, $decoded['min_value']);
        $this->assertSame(99, $decoded['max_value']);
    }

    /** @return array{0:string,1:string,2:string,3:string} */
    private function seedFields(): array
    {
        $org = Organisation::factory()->create();
        $schema = FormSchema::factory()->create(['organisation_id' => $org->id]);

        $number = (string) Str::ulid();
        $text = (string) Str::ulid();
        $date = (string) Str::ulid();
        $section = (string) Str::ulid();

        DB::table('form_fields')->insert([
            $this->row($number, $schema->id, 'NUMBER', 'leeftijd',
                ['min' => 16, 'max' => 99]),
            $this->row($text, $schema->id, 'TEXT', 'postcode',
                ['min' => 5, 'max' => 80]),
            $this->row($date, $schema->id, 'DATE', 'startdatum',
                ['min' => '2026-01-01']),
            $this->row($section, $schema->id, 'SECTION_PRIORITY', 'sectie-voorkeur',
                ['max_priorities' => 3]),
        ]);

        return [$number, $text, $date, $section];
    }

    /** @param array<string, mixed> $validationRules */
    private function row(string $id, string $schemaId, string $fieldType, string $slug, array $validationRules): array
    {
        return [
            'id' => $id,
            'form_schema_id' => $schemaId,
            'field_type' => $fieldType,
            'slug' => $slug,
            'label' => $slug,
            'validation_rules' => json_encode($validationRules),
            'value_storage_hint' => 'json',
            'sort_order' => 0,
            'created_at' => now(),
            'updated_at' => now(),
        ];
    }

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

        $lib = (string) Str::ulid();
        DB::table('form_field_library')->insert([
            [
                'id' => $lib,
                'organisation_id' => $org->id,
                'name' => 'License plate bibliotheek',
                'slug' => 'kenteken-lib',
                'field_type' => 'TEXT',
                'label' => 'Kenteken',
                'validation_rules' => json_encode(['regex' => '/^[A-Z]{3}$/']),
                'default_is_required' => false,
                'default_is_filterable' => false,
                'usage_count' => 0,
                'is_system' => false,
                'is_active' => true,
                'created_at' => now(),
                'updated_at' => now(),
            ],
        ]);

        return [$lib];
    }

    /** @param array<string, mixed> $attrs */
    private function seedFieldWithJson(array $attrs): string
    {
        $org = Organisation::factory()->create();
        $schema = FormSchema::factory()->create(['organisation_id' => $org->id]);

        $id = (string) Str::ulid();
        DB::table('form_fields')->insert([[
            'id' => $id,
            'form_schema_id' => $schema->id,
            'field_type' => $attrs['field_type'],
            'slug' => 'f-'.Str::lower(Str::random(4)),
            'label' => 'field',
            'validation_rules' => json_encode($attrs['validation_rules']),
            'value_storage_hint' => 'json',
            'sort_order' => 0,
            'created_at' => now(),
            'updated_at' => now(),
        ]]);

        return $id;
    }
}