<?php

declare(strict_types=1);

use App\Models\Conversation;
use App\Models\ConversationParticipant;
use App\Models\Message;
use App\Models\MessageAttachment;
use App\Models\Report;
use App\Models\User;
use App\Policies\ConversationPolicy;
use App\Events\ConversationUpdated;
use App\Events\MessageCreated;
use App\Events\MessageRead;
use App\Services\Messaging\MessagingPresenceService;
use Illuminate\Database\QueryException;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Event;
use Illuminate\Support\Facades\Storage;

uses(RefreshDatabase::class);

function makeMessagingUser(array $attrs = []): User
{
    return User::factory()->create(array_merge(['is_active' => 1], $attrs));
}

function makeDirectConversation(User $a, User $b): Conversation
{
    $conv = Conversation::create(['type' => 'direct', 'created_by' => $a->id]);

    ConversationParticipant::insert([
        ['conversation_id' => $conv->id, 'user_id' => $a->id, 'role' => 'admin', 'joined_at' => now(), 'last_read_at' => null],
        ['conversation_id' => $conv->id, 'user_id' => $b->id, 'role' => 'member', 'joined_at' => now(), 'last_read_at' => null],
    ]);

    return $conv;
}

test('message search is membership scoped', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $userC = makeMessagingUser();

    $convAllowed = makeDirectConversation($userA, $userB);
    $convDenied = makeDirectConversation($userB, $userC);

    Message::create(['conversation_id' => $convAllowed->id, 'sender_id' => $userB->id, 'body' => 'phase3 searchable hello']);
    Message::create(['conversation_id' => $convDenied->id, 'sender_id' => $userB->id, 'body' => 'phase3 searchable secret']);

    $response = $this->actingAs($userA)->getJson('/api/messages/search?q=phase3+searchable');

    $response->assertStatus(200);
    $conversations = collect($response->json('data'))->pluck('conversation_id')->unique()->values()->all();

    expect($conversations)->toContain($convAllowed->id)
        ->and($conversations)->not->toContain($convDenied->id);
});

test('typing endpoints store and clear typing state', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);

    $this->actingAs($userA)->postJson("/api/messages/{$conv->id}/typing")
        ->assertStatus(200);

    $typing = $this->actingAs($userB)->getJson("/api/messages/{$conv->id}/typing");
    $typing->assertStatus(200)
        ->assertJsonFragment(['user_id' => $userA->id]);

    $this->actingAs($userA)->postJson("/api/messages/{$conv->id}/typing/stop")
        ->assertStatus(200);

    $typingAfter = $this->actingAs($userB)->getJson("/api/messages/{$conv->id}/typing");
    expect($typingAfter->json('typing'))->toBeArray()->toHaveCount(0);
});

test('message reactions use whitelist and toggle semantics', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);
    $message = Message::create([
        'conversation_id' => $conv->id,
        'sender_id' => $userA->id,
        'body' => 'React me',
    ]);

    $first = $this->actingAs($userB)->postJson("/api/messages/{$message->id}/reactions", [
        'reaction' => '🔥',
    ]);

    $first->assertStatus(200)
        ->assertJsonFragment(['🔥' => 1]);

    $second = $this->actingAs($userB)->postJson("/api/messages/{$message->id}/reactions", [
        'reaction' => '🔥',
    ]);

    $second->assertStatus(200);
    expect($second->json('🔥') ?? 0)->toBe(0);

    $this->actingAs($userB)->postJson("/api/messages/{$message->id}/reactions", [
        'reaction' => '🤯',
    ])->assertStatus(422);
});

test('message attachments are protected by conversation membership', function () {
    Storage::fake(config('messaging.attachments.disk', 'local'));

    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $userC = makeMessagingUser();

    $conv = makeDirectConversation($userA, $userB);

    $image = UploadedFile::fake()->image('phase3.png', 200, 200)->size(200);

    $send = $this->actingAs($userA)->post("/api/messages/{$conv->id}", [
        'body' => 'with file',
        'attachments' => [$image],
    ]);

    $send->assertStatus(201);

    $attachment = MessageAttachment::query()->latest('id')->first();
    expect($attachment)->not->toBeNull();

    $this->actingAs($userB)
        ->get("/messages/attachments/{$attachment->id}")
        ->assertStatus(200);

    $this->actingAs($userC)
        ->get("/messages/attachments/{$attachment->id}")
        ->assertStatus(403);
});

test('pin and unpin endpoints toggle participant pin state', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);

    $this->actingAs($userA)->postJson("/api/messages/{$conv->id}/pin")
        ->assertStatus(200)
        ->assertJsonFragment(['is_pinned' => true]);

    expect(
        (bool) ConversationParticipant::query()
            ->where('conversation_id', $conv->id)
            ->where('user_id', $userA->id)
            ->value('is_pinned')
    )->toBeTrue();

    $this->actingAs($userA)->postJson("/api/messages/{$conv->id}/unpin")
        ->assertStatus(200)
        ->assertJsonFragment(['is_pinned' => false]);
});

test('sending a message dispatches realtime events and preserves client temp id', function () {
    Event::fake([MessageCreated::class, ConversationUpdated::class]);

    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);

    $response = $this->actingAs($userA)->postJson("/api/messages/{$conv->id}", [
        'body' => 'Realtime hello',
        'client_temp_id' => 'tmp_feature_test_123',
    ]);

    $response->assertStatus(201)
        ->assertJsonFragment(['client_temp_id' => 'tmp_feature_test_123'])
        ->assertJsonFragment(['body' => 'Realtime hello']);

    Event::assertDispatched(MessageCreated::class);
    Event::assertDispatched(ConversationUpdated::class);
});

test('retrying a send with the same client temp id reuses the existing message', function () {
    Event::fake([MessageCreated::class]);

    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);

    $first = $this->actingAs($userA)->postJson("/api/messages/{$conv->id}", [
        'body' => 'Retry safe hello',
        'client_temp_id' => 'tmp_retry_safe_001',
    ]);

    $second = $this->actingAs($userA)->postJson("/api/messages/{$conv->id}", [
        'body' => 'Retry safe hello',
        'client_temp_id' => 'tmp_retry_safe_001',
    ]);

    $first->assertStatus(201);
    $second->assertStatus(201);

    expect(Message::query()->count())->toBe(1)
        ->and($second->json('id'))->toBe($first->json('id'))
        ->and($second->json('uuid'))->toBe($first->json('uuid'))
        ->and($second->json('client_temp_id'))->toBe('tmp_retry_safe_001');

    Event::assertDispatchedTimes(MessageCreated::class, 1);
});

test('client temp id dedupe is scoped to sender', function () {
    Event::fake([MessageCreated::class]);

    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);

    $first = $this->actingAs($userA)->postJson("/api/messages/{$conv->id}", [
        'body' => 'Sender A',
        'client_temp_id' => 'tmp_sender_scope_001',
    ]);

    $second = $this->actingAs($userB)->postJson("/api/messages/{$conv->id}", [
        'body' => 'Sender B',
        'client_temp_id' => 'tmp_sender_scope_001',
    ]);

    $first->assertStatus(201);
    $second->assertStatus(201);

    expect(Message::query()->count())->toBe(2)
        ->and($second->json('id'))->not->toBe($first->json('id'));

    Event::assertDispatchedTimes(MessageCreated::class, 2);
});

test('database enforces sender scoped client temp id uniqueness', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);

    Message::create([
        'conversation_id' => $conv->id,
        'sender_id' => $userA->id,
        'body' => 'Stored once',
        'client_temp_id' => 'tmp_db_guard_001',
    ]);

    expect(fn () => Message::create([
        'conversation_id' => $conv->id,
        'sender_id' => $userA->id,
        'body' => 'Stored twice',
        'client_temp_id' => 'tmp_db_guard_001',
    ]))->toThrow(QueryException::class);
});

test('non participant cannot send a message', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $outsider = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);

    $this->actingAs($outsider)->postJson("/api/messages/{$conv->id}", [
        'body' => 'intrusion',
    ])->assertStatus(403);
});

test('channel authorization denies non participant and allows participant', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $outsider = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);

    $policy = app(ConversationPolicy::class);

    expect($policy->view($outsider, $conv))->toBeFalse()
        ->and($policy->view($userA, $conv))->toBeTrue()
        ->and($policy->joinPresence($outsider, $conv))->toBeFalse()
        ->and($policy->joinPresence($userB, $conv))->toBeTrue();
});

test('mark read updates last read message id and dispatches read event', function () {
    Event::fake([MessageRead::class, ConversationUpdated::class]);

    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);

    $first = Message::create([
        'conversation_id' => $conv->id,
        'sender_id' => $userB->id,
        'body' => 'One',
    ]);

    $last = Message::create([
        'conversation_id' => $conv->id,
        'sender_id' => $userB->id,
        'body' => 'Two',
    ]);

    $this->actingAs($userA)
        ->postJson("/api/messages/{$conv->id}/read", ['message_id' => $last->id])
        ->assertStatus(200)
        ->assertJsonFragment(['last_read_message_id' => $last->id]);

    $participant = ConversationParticipant::query()
        ->where('conversation_id', $conv->id)
        ->where('user_id', $userA->id)
        ->firstOrFail();

    expect($participant->last_read_message_id)->toBe($last->id);

    $this->assertDatabaseHas('message_reads', [
        'message_id' => $first->id,
        'user_id' => $userA->id,
    ]);

    $this->assertDatabaseHas('message_reads', [
        'message_id' => $last->id,
        'user_id' => $userA->id,
    ]);

    Event::assertDispatched(MessageRead::class);
});

test('typing endpoints reject non participants', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $outsider = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);

    $this->actingAs($outsider)
        ->postJson("/api/messages/{$conv->id}/typing")
        ->assertStatus(403);

    $this->actingAs($outsider)
        ->postJson("/api/messages/{$conv->id}/typing/stop")
        ->assertStatus(403);
});

test('conversation list includes unread summary total', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();

    $conv = makeDirectConversation($userA, $userB);

    Message::create([
        'conversation_id' => $conv->id,
        'sender_id' => $userB->id,
        'body' => 'Unread one',
    ]);

    Message::create([
        'conversation_id' => $conv->id,
        'sender_id' => $userB->id,
        'body' => 'Unread two',
    ]);

    $response = $this->actingAs($userA)->getJson('/api/messages/conversations');

    $response->assertStatus(200)
        ->assertJsonPath('summary.unread_total', 2);
});

test('conversation updated broadcast includes unread summary total', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();

    $conv = makeDirectConversation($userA, $userB);

    Message::create([
        'conversation_id' => $conv->id,
        'sender_id' => $userB->id,
        'body' => 'Unread one',
    ]);

    Message::create([
        'conversation_id' => $conv->id,
        'sender_id' => $userB->id,
        'body' => 'Unread two',
    ]);

    $payload = (new ConversationUpdated($userA->id, $conv->fresh(), 'message.created'))->broadcastWith();

    expect($payload['reason'])->toBe('message.created')
        ->and((int) data_get($payload, 'conversation.id'))->toBe($conv->id)
        ->and((int) data_get($payload, 'conversation.unread_count'))->toBe(2)
        ->and((int) data_get($payload, 'summary.unread_total'))->toBe(2);
});

test('delta endpoint returns only messages after requested id in ascending order', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();

    $conv = makeDirectConversation($userA, $userB);

    $first = Message::create([
        'conversation_id' => $conv->id,
        'sender_id' => $userB->id,
        'body' => 'First',
    ]);

    $second = Message::create([
        'conversation_id' => $conv->id,
        'sender_id' => $userB->id,
        'body' => 'Second',
    ]);

    $third = Message::create([
        'conversation_id' => $conv->id,
        'sender_id' => $userA->id,
        'body' => 'Third',
    ]);

    $response = $this->actingAs($userA)->getJson("/api/messages/{$conv->id}/delta?after_message_id={$first->id}");

    $response->assertStatus(200)
        ->assertJsonPath('conversation.id', $conv->id)
        ->assertJsonPath('conversation.latest_message.id', $third->id)
        ->assertJsonPath('summary.unread_total', 2)
        ->assertJsonPath('data.0.id', $second->id)
        ->assertJsonPath('data.1.id', $third->id);
});

test('presence heartbeat marks user online and viewing a conversation', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);

    $this->actingAs($userA)
        ->postJson('/api/messages/presence/heartbeat', ['conversation_id' => $conv->id])
        ->assertStatus(200)
        ->assertJsonFragment(['conversation_id' => $conv->id]);

    $presence = app(MessagingPresenceService::class);

    expect($presence->isUserOnline($userA->id))->toBeTrue()
        ->and($presence->isViewingConversation($conv->id, $userA->id))->toBeTrue();
});

test('offline fallback notifications are skipped for online recipients', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);

    app(MessagingPresenceService::class)->touch($userB);

    $this->actingAs($userA)->postJson("/api/messages/{$conv->id}", [
        'body' => 'Presence-aware hello',
    ])->assertStatus(201);

    expect(DB::table('notifications')->count())->toBe(0);
});

test('offline fallback notifications are stored for offline recipients', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);

    $this->actingAs($userA)->postJson("/api/messages/{$conv->id}", [
        'body' => 'Offline hello',
    ])->assertStatus(201);

    $notification = DB::table('notifications')->first();

    expect($notification)->not->toBeNull()
        ->and((int) $notification->user_id)->toBe($userB->id)
        ->and((string) $notification->type)->toBe('message');
});

test('report endpoint creates moderation report entry', function () {
    $userA = makeMessagingUser();
    $userB = makeMessagingUser();
    $conv = makeDirectConversation($userA, $userB);
    $message = Message::create([
        'conversation_id' => $conv->id,
        'sender_id' => $userB->id,
        'body' => 'Reportable',
    ]);

    $response = $this->actingAs($userA)->postJson('/api/reports', [
        'target_type' => 'message',
        'target_id' => $message->id,
        'reason' => 'abuse',
        'details' => 'phase3 test',
    ]);

    $response->assertStatus(201);

    expect(Report::query()->count())->toBe(1)
        ->and(Report::query()->first()->target_type)->toBe('message');
});