<?php

declare(strict_types=1);

namespace Tests\Feature\Api\V1\Portal;

use App\Enums\ShiftAssignmentStatus;
use App\Models\CrowdType;
use App\Models\Event;
use App\Models\FestivalSection;
use App\Models\Location;
use App\Models\Organisation;
use App\Models\Person;
use App\Models\Shift;
use App\Models\ShiftAssignment;
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 PortalAllMyShiftsTest extends TestCase
{
    use RefreshDatabase;

    private User $volunteer;
    private Organisation $organisation;
    private Event $event;
    private FestivalSection $section;
    private TimeSlot $timeSlot;
    private CrowdType $crowdType;
    private Person $person;

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

        $this->organisation = Organisation::factory()->create();
        $this->volunteer = User::factory()->create();
        $this->organisation->users()->attach($this->volunteer, ['role' => 'org_member']);

        $this->event = Event::factory()->create(['organisation_id' => $this->organisation->id]);
        $this->section = FestivalSection::factory()->create([
            'event_id' => $this->event->id,
        ]);
        $this->timeSlot = TimeSlot::factory()->create([
            'event_id' => $this->event->id,
            'person_type' => 'VOLUNTEER',
            'date' => now()->addMonth(),
        ]);
        $this->crowdType = CrowdType::factory()->systemType('VOLUNTEER')->create([
            'organisation_id' => $this->organisation->id,
        ]);
        $this->person = Person::factory()->approved()->create([
            'event_id' => $this->event->id,
            'crowd_type_id' => $this->crowdType->id,
            'user_id' => $this->volunteer->id,
        ]);
    }

    private function createShiftWithAssignment(array $shiftOverrides = [], array $assignmentOverrides = []): ShiftAssignment
    {
        $shift = Shift::factory()->open()->create(array_merge([
            'festival_section_id' => $this->section->id,
            'time_slot_id' => $this->timeSlot->id,
            'slots_total' => 4,
            'slots_open_for_claiming' => 3,
        ], $shiftOverrides));

        // Use approved() only when no explicit status override is given,
        // because approved() uses afterCreating() which would override create() attributes.
        $factory = ShiftAssignment::factory();
        if (! array_key_exists('status', $assignmentOverrides)) {
            $factory = $factory->approved();
        }

        return $factory->create(array_merge([
            'shift_id' => $shift->id,
            'person_id' => $this->person->id,
            'time_slot_id' => $this->timeSlot->id,
        ], $assignmentOverrides));
    }

    // =========================================================================
    // Happy path
    // =========================================================================

    public function test_returns_shifts_for_linked_persons(): void
    {
        $this->createShiftWithAssignment(['title' => 'Tapper']);

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

        $response = $this->getJson('/api/v1/portal/my-shifts');

        $response->assertOk()
            ->assertJsonStructure([
                'data' => [
                    '*' => [
                        'event' => ['id', 'name', 'start_date', 'end_date'],
                        'assignments' => [
                            '*' => [
                                'date',
                                'date_label',
                                'shifts' => [
                                    '*' => [
                                        'id',
                                        'status',
                                        'shift' => [
                                            'id',
                                            'title',
                                            'section_name',
                                            'section_icon',
                                            'time_slot_name',
                                            'date',
                                            'start_time',
                                            'end_time',
                                            'report_time',
                                            'location',
                                        ],
                                    ],
                                ],
                            ],
                        ],
                    ],
                ],
            ]);

        $this->assertCount(1, $response->json('data'));
        $this->assertEquals($this->event->id, $response->json('data.0.event.id'));
        $this->assertEquals('Tapper', $response->json('data.0.assignments.0.shifts.0.shift.title'));
    }

    // =========================================================================
    // Empty results
    // =========================================================================

    public function test_returns_empty_when_user_has_no_linked_persons(): void
    {
        $otherUser = User::factory()->create();

        Sanctum::actingAs($otherUser);

        $response = $this->getJson('/api/v1/portal/my-shifts');

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

    public function test_returns_empty_when_no_active_assignments(): void
    {
        // Person exists but no assignments
        Sanctum::actingAs($this->volunteer);

        $response = $this->getJson('/api/v1/portal/my-shifts');

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

    // =========================================================================
    // Status filtering
    // =========================================================================

    public function test_only_returns_approved_and_pending_approval_assignments(): void
    {
        // Approved — should appear
        $this->createShiftWithAssignment(
            ['title' => 'Approved Shift'],
            ['status' => ShiftAssignmentStatus::APPROVED],
        );

        // Pending approval — should appear
        $this->createShiftWithAssignment(
            ['title' => 'Pending Shift'],
            ['status' => ShiftAssignmentStatus::PENDING_APPROVAL],
        );

        // Cancelled — should NOT appear
        $this->createShiftWithAssignment(
            ['title' => 'Cancelled Shift'],
            ['status' => ShiftAssignmentStatus::CANCELLED],
        );

        // Rejected — should NOT appear
        $this->createShiftWithAssignment(
            ['title' => 'Rejected Shift'],
            ['status' => ShiftAssignmentStatus::REJECTED],
        );

        // Completed — should NOT appear
        $this->createShiftWithAssignment(
            ['title' => 'Completed Shift'],
            ['status' => ShiftAssignmentStatus::COMPLETED],
        );

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

        $response = $this->getJson('/api/v1/portal/my-shifts');

        $response->assertOk();

        $allShifts = collect($response->json('data'))
            ->flatMap(fn ($e) => collect($e['assignments']))
            ->flatMap(fn ($d) => $d['shifts']);

        $this->assertCount(2, $allShifts);

        $statuses = $allShifts->pluck('status')->sort()->values()->all();
        $this->assertEquals(['approved', 'pending_approval'], $statuses);
    }

    public function test_excludes_persons_with_rejected_status(): void
    {
        // Create a rejected person with an approved assignment
        $rejectedPerson = Person::factory()->create([
            'event_id' => $this->event->id,
            'crowd_type_id' => $this->crowdType->id,
            'user_id' => $this->volunteer->id,
            'status' => 'rejected',
        ]);

        $shift = Shift::factory()->open()->create([
            'festival_section_id' => $this->section->id,
            'time_slot_id' => $this->timeSlot->id,
            'slots_total' => 4,
            'slots_open_for_claiming' => 3,
        ]);

        ShiftAssignment::factory()->approved()->create([
            'shift_id' => $shift->id,
            'person_id' => $rejectedPerson->id,
            'time_slot_id' => $this->timeSlot->id,
        ]);

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

        $response = $this->getJson('/api/v1/portal/my-shifts');

        $response->assertOk();

        // Only the approved person should contribute shifts
        $allShifts = collect($response->json('data'))
            ->flatMap(fn ($e) => collect($e['assignments']))
            ->flatMap(fn ($d) => $d['shifts']);

        $this->assertCount(0, $allShifts);
    }

    // =========================================================================
    // Grouping
    // =========================================================================

    public function test_grouped_by_event_and_date(): void
    {
        // Create a second event with its own person and assignment
        $event2 = Event::factory()->create(['organisation_id' => $this->organisation->id]);
        $section2 = FestivalSection::factory()->create(['event_id' => $event2->id]);
        $timeSlot2 = TimeSlot::factory()->create([
            'event_id' => $event2->id,
            'person_type' => 'VOLUNTEER',
            'date' => now()->addMonths(2),
        ]);
        $crowdType2 = CrowdType::factory()->systemType('VOLUNTEER')->create([
            'organisation_id' => $this->organisation->id,
        ]);
        $person2 = Person::factory()->approved()->create([
            'event_id' => $event2->id,
            'crowd_type_id' => $crowdType2->id,
            'user_id' => $this->volunteer->id,
        ]);

        // Assignment in event 1
        $this->createShiftWithAssignment(['title' => 'Event 1 Shift']);

        // Assignment in event 2
        $shift2 = Shift::factory()->open()->create([
            'festival_section_id' => $section2->id,
            'time_slot_id' => $timeSlot2->id,
            'slots_total' => 4,
            'slots_open_for_claiming' => 3,
            'title' => 'Event 2 Shift',
        ]);
        ShiftAssignment::factory()->approved()->create([
            'shift_id' => $shift2->id,
            'person_id' => $person2->id,
            'time_slot_id' => $timeSlot2->id,
        ]);

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

        $response = $this->getJson('/api/v1/portal/my-shifts');

        $response->assertOk();

        // Should have 2 event groups
        $this->assertCount(2, $response->json('data'));

        $eventIds = collect($response->json('data'))->pluck('event.id')->sort()->values()->all();
        $this->assertContains($this->event->id, $eventIds);
        $this->assertContains($event2->id, $eventIds);
    }

    public function test_multiple_dates_within_same_event(): void
    {
        $timeSlot2 = TimeSlot::factory()->create([
            'event_id' => $this->event->id,
            'person_type' => 'VOLUNTEER',
            'date' => now()->addMonths(2),
        ]);

        // Day 1 shift
        $this->createShiftWithAssignment(['title' => 'Day 1 Shift']);

        // Day 2 shift
        $shift2 = Shift::factory()->open()->create([
            'festival_section_id' => $this->section->id,
            'time_slot_id' => $timeSlot2->id,
            'slots_total' => 4,
            'slots_open_for_claiming' => 3,
            'title' => 'Day 2 Shift',
        ]);
        ShiftAssignment::factory()->approved()->create([
            'shift_id' => $shift2->id,
            'person_id' => $this->person->id,
            'time_slot_id' => $timeSlot2->id,
        ]);

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

        $response = $this->getJson('/api/v1/portal/my-shifts');

        $response->assertOk();

        // 1 event group with 2 date groups
        $this->assertCount(1, $response->json('data'));
        $this->assertCount(2, $response->json('data.0.assignments'));
    }

    // =========================================================================
    // Authentication
    // =========================================================================

    public function test_unauthenticated_returns_401(): void
    {
        $response = $this->getJson('/api/v1/portal/my-shifts');

        $response->assertUnauthorized();
    }

    // =========================================================================
    // Response data
    // =========================================================================

    public function test_shift_includes_location_data(): void
    {
        $location = Location::factory()->create([
            'event_id' => $this->event->id,
            'name' => 'Hoofdpodium',
            'address' => 'Festivalplein 1',
        ]);

        $this->createShiftWithAssignment([
            'title' => 'Shift met locatie',
            'location_id' => $location->id,
        ]);

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

        $response = $this->getJson('/api/v1/portal/my-shifts');

        $response->assertOk();

        $shiftData = $response->json('data.0.assignments.0.shifts.0.shift');
        $this->assertEquals('Hoofdpodium', $shiftData['location']['name']);
        $this->assertEquals('Festivalplein 1', $shiftData['location']['address']);
    }

    public function test_shift_without_location_returns_null(): void
    {
        $this->createShiftWithAssignment([
            'title' => 'Shift zonder locatie',
            'location_id' => null,
        ]);

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

        $response = $this->getJson('/api/v1/portal/my-shifts');

        $response->assertOk();
        $this->assertNull($response->json('data.0.assignments.0.shifts.0.shift.location'));
    }

    public function test_shift_title_falls_back_to_section_name(): void
    {
        $this->createShiftWithAssignment(['title' => null]);

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

        $response = $this->getJson('/api/v1/portal/my-shifts');

        $response->assertOk();

        $shiftTitle = $response->json('data.0.assignments.0.shifts.0.shift.title');
        $this->assertEquals($this->section->name, $shiftTitle);
    }
}