<?php

namespace Tests\Feature\Gateway;

use App\Models\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\Http;
use Tests\TestCase;

class ChatControllerTest extends TestCase
{
    // use RefreshDatabase; // Not required for proxy tests; uncomment if your auth relies on DB

    private function base(): string
    {
        return rtrim((string) config('services.backend.base'), '/');
    }

    private function actingUser()
    {
        return User::factory()->create(['username' => 'tester', 'email_verified_at' => now()]);
    }

    public function test_get_chat_success_maps_messages_and_last_id()
    {
        Http::fake([
            $this->base() . '/chat*' => Http::response([
                'messages' => [
                    [
                        'id' => 1,
                        'user_id' => 12,
                        'username' => 'dolo',
                        'avatar' => 'http://a/1.png',
                        'message' => 'hi',
                        'reply_to_id' => null,
                        'reactions' => ['🔥' => 2, '😂' => 1],
                        'created_at' => now()->toIso8601String(),
                    ],
                    [
                        'id' => 2,
                        'user_id' => 13,
                        'username' => 'sara',
                        'avatar' => null,
                        'message' => 'yo',
                        'reply_to_id' => 1,
                        'reactions' => [],
                        'created_at' => now()->toIso8601String(),
                    ],
                ],
            ], 200),
        ]);

        $res = $this->actingAs($this->actingUser(), 'web')
            ->get('/api/chat?limit=2');

        $res->assertStatus(200)
            ->assertJsonStructure([
                'data' => [
                    ['id', 'user_id', 'message', 'reply_to_id', 'created_at', 'user' => ['id', 'username', 'avatar_url'], 'reactions_agg'],
                ],
                'last_id',
            ]);

        $json = $res->json();
        $this->assertEquals(2, $json['last_id']);
        $this->assertCount(2, $json['data']);
        $this->assertEquals('dolo', $json['data'][0]['user']['username']);
    }

    public function test_get_chat_client_error_is_mapped()
    {
        Http::fake([
            $this->base() . '/chat*' => Http::response(['message' => 'Invalid request'], 422),
        ]);

        $res = $this->actingAs($this->actingUser(), 'web')
            ->get('/api/chat?limit=0');

        $res->assertStatus(422)
            ->assertJson([
                'error' => 'client_error',
                'message' => 'Invalid request',
            ]);
    }

    public function test_get_chat_server_error_maps_to_503()
    {
        Http::fake([
            $this->base() . '/chat*' => Http::response(['message' => 'Upstream failed'], 500),
        ]);

        $res = $this->actingAs($this->actingUser(), 'web')
            ->get('/api/chat?limit=50');

        $res->assertStatus(503)
            ->assertJson([
                'error' => 'service_unavailable',
            ]);
    }

    public function test_get_chat_timeout_maps_to_502()
    {
        Http::fake(function () {
            throw new \Illuminate\Http\Client\ConnectionException('timeout');
        });

        $res = $this->actingAs($this->actingUser(), 'web')
            ->get('/api/chat?limit=50');

        $res->assertStatus(502)
            ->assertJson([
                'error' => 'bad_gateway',
            ]);
    }

    public function test_post_chat_success_returns_minimal_message()
    {
        Http::fake([
            $this->base() . '/chat' => Http::response(['success' => true, 'message_id' => 123], 200),
        ]);

        $res = $this->actingAs($this->actingUser(), 'web')
            ->postJson('/api/chat', [
                'message' => 'Hello world',
            ]);

        $res->assertStatus(201)
            ->assertJsonStructure(['data' => ['id', 'user_id', 'message', 'created_at', 'user' => ['id', 'username', 'avatar_url'], 'reactions_agg']]);

        $this->assertEquals(123, data_get($res->json(), 'data.id'));
        $this->assertEquals('Hello world', data_get($res->json(), 'data.message'));
    }

    public function test_post_chat_client_error_is_mapped()
    {
        Http::fake([
            $this->base() . '/chat' => Http::response(['message' => 'Too long'], 422),
        ]);

        $res = $this->actingAs($this->actingUser(), 'web')
            ->postJson('/api/chat', [
                'message' => str_repeat('x', 400),
            ]);

        $res->assertStatus(422)
            ->assertJson([
                'error' => 'client_error',
                'message' => 'Too long',
            ]);
    }

    public function test_react_success_returns_200()
    {
        Http::fake([
            $this->base() . '/chat/55/react' => Http::response(['ok' => true], 200),
        ]);

        $res = $this->actingAs($this->actingUser(), 'web')
            ->postJson('/api/chat/55/react', [ 'emoji' => '🔥' ]);

        $res->assertStatus(200)
            ->assertJson([
                'data' => null,
            ]);
    }
}