dramaling-vocab-learning/backend/DramaLing.Api.Tests/Integration/Controllers/AIControllerTests.cs

using DramaLing.Api.Tests.Integration.Fixtures;
using System.Net;
using System.Net.Http.Json;

namespace DramaLing.Api.Tests.Integration.Controllers;

/// <summary>
/// AIController 整合測試
/// 測試 AI 分析相關的 API 端點功能
/// </summary>
public class AIControllerTests : IntegrationTestBase
{
    public AIControllerTests(DramaLingWebApplicationFactory factory) : base(factory)
    {
    }

    [Fact]
    public async Task AnalyzeSentence_WithValidAuth_ShouldReturnAnalysis()
    {
        // Arrange
        var client = CreateTestUser1Client();
        var analysisData = new
        {
            text = "Hello, this is a beautiful day for learning English.",
            targetLevel = "A2",
            includeGrammar = true,
            includeVocabulary = true
        };

        // Act
        var response = await client.PostAsJsonAsync("/api/ai/analyze-sentence", analysisData);

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

    [Fact]
    public async Task AnalyzeSentence_WithoutAuth_ShouldReturn401()
    {
        // Arrange
        var analysisData = new
        {
            text = "Hello, this is a test sentence.",
            targetLevel = "A2"
        };

        // Act
        var response = await HttpClient.PostAsJsonAsync("/api/ai/analyze-sentence", analysisData);

        // Assert
        response.StatusCode.Should().Be(HttpStatusCode.Unauthorized);
    }

    [Fact]
    public async Task AnalyzeSentence_WithEmptyText_ShouldReturn400()
    {
        // Arrange
        var client = CreateTestUser1Client();
        var analysisData = new
        {
            text = "", // 空文本
            targetLevel = "A2"
        };

        // Act
        var response = await client.PostAsJsonAsync("/api/ai/analyze-sentence", analysisData);

        // Assert
        response.StatusCode.Should().Be(HttpStatusCode.BadRequest);
    }

    [Fact]
    public async Task GetHealth_ShouldReturnHealthStatus()
    {
        // Arrange
        var client = CreateTestUser1Client();

        // Act
        var response = await client.GetAsync("/api/ai/health");

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

    [Fact]
    public async Task GetStats_WithValidAuth_ShouldReturnStats()
    {
        // Arrange
        var client = CreateTestUser1Client();

        // Act
        var response = await client.GetAsync("/api/ai/stats");

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

    [Fact]
    public async Task GetStats_WithoutAuth_ShouldReturn401()
    {
        // Arrange & Act
        var response = await HttpClient.GetAsync("/api/ai/stats");

        // Assert
        response.StatusCode.Should().Be(HttpStatusCode.Unauthorized);
    }

    [Fact]
    public async Task MockGeminiService_ShouldWorkCorrectly()
    {
        // Arrange
        var client = CreateTestUser1Client();
        var testSentence = new
        {
            text = "The sophisticated algorithm analyzed the beautiful sentence.",
            targetLevel = "B2",
            includeGrammar = true,
            includeVocabulary = true
        };

        // Act
        var response = await client.PostAsJsonAsync("/api/ai/analyze-sentence", testSentence);

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

        // 驗證 Mock 服務返回預期的回應格式
        content.Should().Contain("success");
        // Mock 服務應該能夠處理這個請求而不需要真實的 Gemini API
    }
}