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

namespace DramaLing.Api.Tests.Integration.Controllers;

/// <summary>
/// FlashcardsController 整合測試
/// 測試詞卡相關的 API 端點功能
/// </summary>
public class FlashcardsControllerTests : IntegrationTestBase
{
    public FlashcardsControllerTests(DramaLingWebApplicationFactory factory) : base(factory)
    {
    }

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

        // Act
        var response = await client.GetAsync("/api/flashcards/due");

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

    [Fact]
    public async Task GetDueFlashcards_WithoutAuth_ShouldReturn401()
    {
        // Arrange
        var client = HttpClient; // 未認證的 client

        // Act
        var response = await client.GetAsync("/api/flashcards/due");

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

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

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

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

    [Fact]
    public async Task GetFlashcardById_WithValidUserAndId_ShouldReturnFlashcard()
    {
        // Arrange
        var client = CreateTestUser1Client();
        var flashcardId = TestDataSeeder.TestFlashcard1Id;

        // Act
        var response = await client.GetAsync($"/api/flashcards/{flashcardId}");

        // Assert
        response.StatusCode.Should().Be(HttpStatusCode.OK);
        var content = await response.Content.ReadAsStringAsync();
        content.Should().Contain("hello"); // 測試資料中的詞彙
    }

    [Fact]
    public async Task GetFlashcardById_WithDifferentUser_ShouldReturn404()
    {
        // Arrange - TestUser2 嘗試存取 TestUser1 的詞卡
        var client = CreateTestUser2Client();
        var user1FlashcardId = TestDataSeeder.TestFlashcard1Id; // 屬於 TestUser1

        // Act
        var response = await client.GetAsync($"/api/flashcards/{user1FlashcardId}");

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

    [Fact]
    public async Task MarkWordMastered_WithValidFlashcard_ShouldUpdateReview()
    {
        // Arrange
        var client = CreateTestUser1Client();
        var flashcardId = TestDataSeeder.TestFlashcard1Id;

        // Act
        var response = await client.PostAsync($"/api/flashcards/{flashcardId}/mastered", null);

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

        // 驗證資料庫中的複習記錄是否更新
        using var context = GetDbContext();
        var review = context.FlashcardReviews
            .First(r => r.FlashcardId == flashcardId && r.UserId == TestDataSeeder.TestUser1Id);
        review.SuccessCount.Should().BeGreaterThan(0);
    }

    [Fact]
    public async Task UserDataIsolation_ShouldBeEnforced()
    {
        // Arrange
        var user1Client = CreateTestUser1Client();
        var user2Client = CreateTestUser2Client();

        // Act - 兩個用戶分別取得詞卡
        var user1Response = await user1Client.GetAsync("/api/flashcards");
        var user2Response = await user2Client.GetAsync("/api/flashcards");

        // Assert
        user1Response.StatusCode.Should().Be(HttpStatusCode.OK);
        user2Response.StatusCode.Should().Be(HttpStatusCode.OK);

        var user1Content = await user1Response.Content.ReadAsStringAsync();
        var user2Content = await user2Response.Content.ReadAsStringAsync();

        // TestUser1 有 2 張詞卡，TestUser2 有 1 張詞卡
        user1Content.Should().Contain("hello");
        user1Content.Should().Contain("beautiful");
        user2Content.Should().Contain("sophisticated");

        // 確保用戶間資料隔離
        user1Content.Should().NotContain("sophisticated");
        user2Content.Should().NotContain("hello");
        user2Content.Should().NotContain("beautiful");
    }
}