<?php

declare(strict_types=1);

namespace Tests\Feature\Event;

use App\Models\Event;
use App\Models\FestivalSection;
use App\Models\Organisation;
use App\Models\TimeSlot;
use App\Models\User;
use Database\Seeders\RoleSeeder;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Laravel\Sanctum\Sanctum;
use Tests\TestCase;

class EventStatusTransitionTest extends TestCase
{
    use RefreshDatabase;

    private User $orgAdmin;
    private Organisation $organisation;

    protected function setUp(): void
    {
        parent::setUp();
        $this->seed(RoleSeeder::class);

        $this->organisation = Organisation::factory()->create();

        $this->orgAdmin = User::factory()->create();
        $this->organisation->users()->attach($this->orgAdmin, ['role' => 'org_admin']);
    }

    private function transitionUrl(Event $event): string
    {
        return "/api/v1/organisations/{$this->organisation->id}/events/{$event->id}/transition";
    }

    // --- Valid transitions ---

    public function test_transition_draft_to_published(): void
    {
        $event = Event::factory()->create([
            'organisation_id' => $this->organisation->id,
            'status' => 'draft',
        ]);

        Sanctum::actingAs($this->orgAdmin);

        $response = $this->postJson($this->transitionUrl($event), ['status' => 'published']);

        $response->assertOk();
        $this->assertDatabaseHas('events', ['id' => $event->id, 'status' => 'published']);
    }

    public function test_transition_published_to_registration_open(): void
    {
        $event = Event::factory()->create([
            'organisation_id' => $this->organisation->id,
            'status' => 'published',
        ]);

        // Create prerequisites: time slot + section
        TimeSlot::factory()->create(['event_id' => $event->id]);
        FestivalSection::factory()->create(['event_id' => $event->id]);

        Sanctum::actingAs($this->orgAdmin);

        $response = $this->postJson($this->transitionUrl($event), ['status' => 'registration_open']);

        $response->assertOk();
        $this->assertDatabaseHas('events', ['id' => $event->id, 'status' => 'registration_open']);
    }

    public function test_transition_published_back_to_draft(): void
    {
        $event = Event::factory()->create([
            'organisation_id' => $this->organisation->id,
            'status' => 'published',
        ]);

        Sanctum::actingAs($this->orgAdmin);

        $response = $this->postJson($this->transitionUrl($event), ['status' => 'draft']);

        $response->assertOk();
        $this->assertDatabaseHas('events', ['id' => $event->id, 'status' => 'draft']);
    }

    // --- Invalid transitions ---

    public function test_transition_draft_to_showday_fails(): void
    {
        $event = Event::factory()->create([
            'organisation_id' => $this->organisation->id,
            'status' => 'draft',
        ]);

        Sanctum::actingAs($this->orgAdmin);

        $response = $this->postJson($this->transitionUrl($event), ['status' => 'showday']);

        $response->assertUnprocessable()
            ->assertJsonPath('current_status', 'draft')
            ->assertJsonPath('requested_status', 'showday');
    }

    public function test_transition_closed_to_anything_fails(): void
    {
        $event = Event::factory()->create([
            'organisation_id' => $this->organisation->id,
            'status' => 'closed',
        ]);

        Sanctum::actingAs($this->orgAdmin);

        $response = $this->postJson($this->transitionUrl($event), ['status' => 'draft']);

        $response->assertUnprocessable()
            ->assertJsonPath('allowed_transitions', []);
    }

    // --- Prerequisite checks ---

    public function test_transition_registration_open_without_timeslots_fails(): void
    {
        $event = Event::factory()->create([
            'organisation_id' => $this->organisation->id,
            'status' => 'published',
        ]);

        // Create a section but no time slot
        FestivalSection::factory()->create(['event_id' => $event->id]);

        Sanctum::actingAs($this->orgAdmin);

        $response = $this->postJson($this->transitionUrl($event), ['status' => 'registration_open']);

        $response->assertUnprocessable();
        $this->assertContains(
            'At least one time slot must exist before opening registration.',
            $response->json('errors')
        );
    }

    // --- Regular update cannot change status ---

    public function test_regular_update_cannot_change_status(): void
    {
        $event = Event::factory()->create([
            'organisation_id' => $this->organisation->id,
            'status' => 'draft',
        ]);

        Sanctum::actingAs($this->orgAdmin);

        $this->putJson("/api/v1/organisations/{$this->organisation->id}/events/{$event->id}", [
            'status' => 'published',
        ]);

        // Status should remain draft — the field is ignored by UpdateEventRequest
        $this->assertDatabaseHas('events', ['id' => $event->id, 'status' => 'draft']);
    }

    // --- Festival cascade ---

    public function test_festival_showday_cascades_to_children(): void
    {
        $festival = Event::factory()->festival()->create([
            'organisation_id' => $this->organisation->id,
            'status' => 'buildup',
        ]);

        $childDraft = Event::factory()->subEvent($festival)->create(['status' => 'draft']);
        $childPublished = Event::factory()->subEvent($festival)->create(['status' => 'published']);
        $childBuildup = Event::factory()->subEvent($festival)->create(['status' => 'buildup']);

        Sanctum::actingAs($this->orgAdmin);

        $response = $this->postJson($this->transitionUrl($festival), ['status' => 'showday']);

        $response->assertOk();

        // All children in earlier statuses should be cascaded to showday
        $this->assertDatabaseHas('events', ['id' => $childDraft->id, 'status' => 'showday']);
        $this->assertDatabaseHas('events', ['id' => $childPublished->id, 'status' => 'showday']);
        $this->assertDatabaseHas('events', ['id' => $childBuildup->id, 'status' => 'showday']);
    }

    // --- EventResource includes allowed_transitions ---

    public function test_allowed_transitions_in_resource(): void
    {
        $event = Event::factory()->create([
            'organisation_id' => $this->organisation->id,
            'status' => 'draft',
        ]);

        Sanctum::actingAs($this->orgAdmin);

        $response = $this->getJson("/api/v1/organisations/{$this->organisation->id}/events/{$event->id}");

        $response->assertOk()
            ->assertJsonPath('data.allowed_transitions', ['published']);
    }

    // --- Auth ---

    public function test_unauthenticated_user_cannot_transition(): void
    {
        $event = Event::factory()->create([
            'organisation_id' => $this->organisation->id,
            'status' => 'draft',
        ]);

        $response = $this->postJson($this->transitionUrl($event), ['status' => 'published']);

        $response->assertUnauthorized();
    }

    public function test_outsider_cannot_transition(): void
    {
        $event = Event::factory()->create([
            'organisation_id' => $this->organisation->id,
            'status' => 'draft',
        ]);

        $outsider = User::factory()->create();
        Sanctum::actingAs($outsider);

        $response = $this->postJson($this->transitionUrl($event), ['status' => 'published']);

        $response->assertForbidden();
    }
}