using System.Net;
using System.Net.Http.Json;
using System.Text;
using System.Text.Json;
using FluentAssertions;
using Xunit;

namespace Examples.Integration.Tests;

/// <summary>
/// Integration tests for the Billing microservice endpoints.
/// </summary>
public sealed class BillingEndpointTests : IClassFixture<GatewayFixture>
{
    private readonly GatewayFixture _fixture;

    public BillingEndpointTests(GatewayFixture fixture)
    {
        _fixture = fixture;
    }

    [Fact]
    public async Task CreateInvoice_WithValidRequest_ReturnsCreatedInvoice()
    {
        // Arrange
        var request = new
        {
            customerId = "CUST-001",
            amount = 99.99m,
            description = "Test invoice"
        };

        // Act
        var response = await _fixture.GatewayClient.PostAsJsonAsync("/invoices", request);

        // Assert
        response.StatusCode.Should().Be(HttpStatusCode.OK);
        var content = await response.Content.ReadAsStringAsync();
        content.Should().Contain("invoiceId");
    }

    [Fact]
    public async Task GetInvoice_WithValidId_ReturnsInvoice()
    {
        // Arrange
        var invoiceId = "INV-12345";

        // Act
        var response = await _fixture.GatewayClient.GetAsync($"/invoices/{invoiceId}");

        // Assert
        response.StatusCode.Should().Be(HttpStatusCode.OK);
        var content = await response.Content.ReadAsStringAsync();
        content.Should().Contain(invoiceId);
    }

    [Fact]
    public async Task UploadAttachment_WithStreamingData_ReturnsSuccess()
    {
        // Arrange
        var invoiceId = "INV-12345";
        var attachmentData = Encoding.UTF8.GetBytes("This is test attachment content");
        using var content = new ByteArrayContent(attachmentData);
        content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/octet-stream");

        // Act
        var response = await _fixture.GatewayClient.PostAsync(
            $"/invoices/{invoiceId}/attachments",
            content);

        // Assert
        response.StatusCode.Should().Be(HttpStatusCode.OK);
        var responseContent = await response.Content.ReadAsStringAsync();
        responseContent.Should().Contain("attachmentId");
    }
}