<?php

namespace Tests\Feature;

use App\Models\Application;
use App\Models\Position;
use App\Models\PusatMengundi;
use App\Models\StaffAssignment;
use App\Models\User;
use Database\Seeders\DatabaseSeeder;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;
use Tests\TestCase;

class PublicApplicationTest extends TestCase
{
    use RefreshDatabase;

    public function test_applicant_can_register_during_registration_period(): void
    {
        Storage::fake('local');
        $this->seed(DatabaseSeeder::class);

        $pusat = PusatMengundi::query()->where('code', 'PM001')->firstOrFail();

        $response = $this->post(route('public.applications.store', $pusat->public_uuid), $this->validPayload([
            'requested_position_code' => 'PAPM',
            'ic_number' => '900101101111',
        ]));

        $application = Application::query()->where('ic_number', '900101101111')->firstOrFail();

        $response->assertRedirect(route('public.applications.success', $application->public_uuid));
        $this->assertSame('submitted', $application->status);
        $this->assertSame('public', $application->source);
        $this->assertSame($pusat->id, $application->pusat_mengundi_id);
        $this->assertCount(2, $application->documents);
        $this->assertTrue($application->bankVerification()->where('status', 'pending')->exists());
        $this->assertTrue($application->statusHistories()->where('to_status', 'submitted')->exists());

        foreach ($application->documents as $document) {
            Storage::disk('local')->assertExists($document->path);
        }
    }

    public function test_applicant_cannot_register_after_registration_period(): void
    {
        Storage::fake('local');
        $this->seed(DatabaseSeeder::class);

        $pusat = PusatMengundi::query()->where('code', 'PM001')->firstOrFail();
        $pusat->election->settings()->update([
            'registration_start_date' => now()->subWeeks(4)->toDateString(),
            'registration_end_date' => now()->subDay()->toDateString(),
            'is_registration_open' => true,
            'is_registration_open_override' => null,
        ]);

        $this->get(route('public.applications.create', $pusat->public_uuid))
            ->assertOk()
            ->assertSee('Pendaftaran Ditutup');

        $this->post(route('public.applications.store', $pusat->public_uuid), $this->validPayload([
            'ic_number' => '900101101112',
        ]))
            ->assertSessionHasErrors('registration');

        $this->assertDatabaseMissing('applications', [
            'ic_number' => '900101101112',
        ]);
    }

    public function test_applicant_cannot_register_without_required_documents(): void
    {
        $this->seed(DatabaseSeeder::class);

        $pusat = PusatMengundi::query()->where('code', 'PM001')->firstOrFail();
        $payload = $this->validPayload([
            'ic_number' => '900101101113',
        ]);
        unset($payload['ic_document'], $payload['bank_statement']);

        $this->post(route('public.applications.store', $pusat->public_uuid), $payload)
            ->assertSessionHasErrors(['ic_document', 'bank_statement']);

        $this->assertDatabaseMissing('applications', [
            'ic_number' => '900101101113',
        ]);
    }

    public function test_kp_applicant_can_choose_ktm_when_vacancy_exists(): void
    {
        Storage::fake('local');
        $this->seed(DatabaseSeeder::class);

        $pusat = PusatMengundi::query()->where('code', 'PM001')->firstOrFail();
        $ktmAssignment = $this->ktmAssignment($pusat);

        $this->post(route('public.applications.store', $pusat->public_uuid), $this->validPayload([
            'requested_position_code' => 'KP',
            'selected_ktm_assignment_id' => $ktmAssignment->id,
            'ic_number' => '900101101114',
        ]))
            ->assertRedirect();

        $this->assertDatabaseHas('applications', [
            'ic_number' => '900101101114',
            'selected_ktm_assignment_id' => $ktmAssignment->id,
        ]);
    }

    public function test_kp_applicant_cannot_choose_ktm_when_vacancy_is_full(): void
    {
        Storage::fake('local');
        $this->seed(DatabaseSeeder::class);

        $pusat = PusatMengundi::query()->where('code', 'PM001')->firstOrFail();
        $ktmAssignment = $this->ktmAssignment($pusat);
        $kpPosition = Position::query()->where('code', 'KP')->firstOrFail();

        foreach (range(1, 4) as $sequence) {
            StaffAssignment::query()->create([
                'election_id' => $pusat->election_id,
                'user_id' => User::factory()->create()->id,
                'position_id' => $kpPosition->id,
                'pusat_mengundi_id' => $pusat->id,
                'saluran_mengundi_id' => $ktmAssignment->saluran_mengundi_id,
                'reports_to_assignment_id' => $ktmAssignment->id,
                'status' => 'active',
                'assigned_at' => now()->subMinutes($sequence),
                'source' => 'test',
            ]);
        }

        $this->post(route('public.applications.store', $pusat->public_uuid), $this->validPayload([
            'requested_position_code' => 'KP',
            'selected_ktm_assignment_id' => $ktmAssignment->id,
            'ic_number' => '900101101115',
        ]))
            ->assertSessionHasErrors('selected_ktm_assignment_id');

        $this->assertDatabaseMissing('applications', [
            'ic_number' => '900101101115',
        ]);
    }

    public function test_public_registration_is_blocked_when_same_ic_was_created_by_ktm(): void
    {
        Storage::fake('local');
        $this->seed(DatabaseSeeder::class);

        $pusat = PusatMengundi::query()->where('code', 'PM001')->firstOrFail();
        $position = Position::query()->where('code', 'KP')->firstOrFail();

        Application::query()->create([
            'election_id' => $pusat->election_id,
            'pusat_mengundi_id' => $pusat->id,
            'public_uuid' => (string) Str::uuid(),
            'source' => 'created_by_ktm',
            'status' => 'submitted',
            'name' => 'Pemohon Dicipta KTM',
            'ic_number' => '900101101116',
            'phone_number' => '0123456789',
            'email' => 'ktm-created@example.test',
            'address' => 'Alamat ujian',
            'requested_position_id' => $position->id,
        ]);

        $this->post(route('public.applications.store', $pusat->public_uuid), $this->validPayload([
            'requested_position_code' => 'PAPM',
            'ic_number' => '900101101116',
        ]))
            ->assertSessionHasErrors('ic_number');

        $this->assertSame(1, Application::query()->where('ic_number', '900101101116')->count());
    }

    public function test_public_registration_is_unblocked_after_ktm_deletes_applicant(): void
    {
        Storage::fake('local');
        $this->seed(DatabaseSeeder::class);

        $pusat = PusatMengundi::query()->where('code', 'PM001')->firstOrFail();
        $position = Position::query()->where('code', 'KP')->firstOrFail();

        $ktmCreated = Application::query()->create([
            'election_id' => $pusat->election_id,
            'pusat_mengundi_id' => $pusat->id,
            'public_uuid' => (string) Str::uuid(),
            'source' => 'created_by_ktm',
            'status' => 'submitted',
            'name' => 'Pemohon Dicipta KTM',
            'ic_number' => '900101101117',
            'phone_number' => '0123456789',
            'email' => 'ktm-to-delete@example.test',
            'address' => 'Alamat ujian',
            'requested_position_id' => $position->id,
        ]);

        // Simulate KTM delete: set status and soft-delete
        $ktmCreated->forceFill(['status' => 'deleted_by_ktm'])->save();
        $ktmCreated->delete();

        // Public applicant with same IC must now be allowed to register
        $this->post(route('public.applications.store', $pusat->public_uuid), $this->validPayload([
            'requested_position_code' => 'PAPM',
            'ic_number' => '900101101117',
        ]))
            ->assertRedirect();

        // Exactly 1 active application exists (the new one); deleted one is soft-deleted
        $this->assertSame(1, Application::query()->where('ic_number', '900101101117')->count());
        $this->assertSame(2, Application::withTrashed()->where('ic_number', '900101101117')->count());
    }

    public function test_cancelled_application_does_not_block_new_registration(): void
    {
        Storage::fake('local');
        $this->seed(DatabaseSeeder::class);

        $pusat = PusatMengundi::query()->where('code', 'PM001')->firstOrFail();
        $position = Position::query()->where('code', 'PAPM')->firstOrFail();

        // Create an application and cancel it (status = cancelled, NOT soft-deleted)
        Application::query()->create([
            'election_id' => $pusat->election_id,
            'pusat_mengundi_id' => $pusat->id,
            'public_uuid' => (string) Str::uuid(),
            'source' => 'public',
            'status' => 'cancelled',
            'name' => 'Pemohon Dibatalkan',
            'ic_number' => '900101101118',
            'phone_number' => '0123456789',
            'email' => 'cancelled@example.test',
            'address' => 'Alamat ujian',
            'requested_position_id' => $position->id,
        ]);

        // Same IC must be allowed to register fresh
        $this->post(route('public.applications.store', $pusat->public_uuid), $this->validPayload([
            'requested_position_code' => 'PAPM',
            'ic_number' => '900101101118',
        ]))
            ->assertRedirect();

        $this->assertSame(2, Application::query()->where('ic_number', '900101101118')->count());
        $this->assertSame(1, Application::query()->where('ic_number', '900101101118')->where('status', 'submitted')->count());
    }

    /**
     * @param  array<string, mixed>  $overrides
     * @return array<string, mixed>
     */
    private function validPayload(array $overrides = []): array
    {
        return array_replace([
            'name' => 'Pemohon Ujian',
            'ic_number' => '900101101110',
            'phone_number' => '0123456789',
            'email' => 'pemohon@example.test',
            'address' => 'No. 1, Jalan Ujian',
            'requested_position_code' => 'KTM',
            'selected_ktm_assignment_id' => null,
            'bank_name' => 'Maybank',
            'bank_account_number' => '1234567890',
            'ic_document' => UploadedFile::fake()->create('ic.pdf', 120, 'application/pdf'),
            'bank_statement' => UploadedFile::fake()->create('bank.pdf', 120, 'application/pdf'),
        ], $overrides);
    }

    private function ktmAssignment(PusatMengundi $pusatMengundi): StaffAssignment
    {
        $ktmPosition = Position::query()->where('code', 'KTM')->firstOrFail();

        return StaffAssignment::query()
            ->where('election_id', $pusatMengundi->election_id)
            ->where('pusat_mengundi_id', $pusatMengundi->id)
            ->where('position_id', $ktmPosition->id)
            ->where('status', 'active')
            ->whereNotNull('saluran_mengundi_id')
            ->firstOrFail();
    }
}