using System.Security.Claims;
using System.Text;
using JobTrackerApi.Controllers;
using JobTrackerApi.Models;
using JobTrackerApi.Services;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging.Abstractions;
using Microsoft.Extensions.Options;
using Moq;
using Xunit;

namespace JobTrackerApi.Tests;

public sealed class ProfileCvControllerTests
{
    [Fact]
    public async Task Upload_rejects_unsupported_extension()
    {
        var user = new ApplicationUser();
        var userManager = CreateUserManager();
        userManager.Setup(x => x.GetUserAsync(It.IsAny<ClaimsPrincipal>())).ReturnsAsync(user);
        var aiService = new Mock<ISummarizerService>();

        var controller = new ProfileCvController(userManager.Object, aiService.Object)
        {
            ControllerContext = new ControllerContext { HttpContext = new DefaultHttpContext() }
        };

        var file = new FormFile(new MemoryStream(Encoding.UTF8.GetBytes("hello")), 0, 5, "file", "resume.exe");
        var result = await controller.Upload(file);

        var badRequest = Assert.IsType<BadRequestObjectResult>(result);
        Assert.True((badRequest.Value?.ToString() ?? string.Empty).Contains("supported", StringComparison.OrdinalIgnoreCase));
    }

    [Fact]
    public async Task Upload_accepts_markdown_cv_and_saves_text()
    {
        var user = new ApplicationUser();
        var userManager = CreateUserManager();
        userManager.Setup(x => x.GetUserAsync(It.IsAny<ClaimsPrincipal>())).ReturnsAsync(user);
        userManager.Setup(x => x.UpdateAsync(user)).ReturnsAsync(IdentityResult.Success);
        var aiService = new Mock<ISummarizerService>();
        aiService
            .Setup(x => x.ExtractTextAsync(It.IsAny<Stream>(), It.IsAny<string>(), It.IsAny<string?>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync(new AiTextExtractionResult("# CV\nBuilt APIs and UIs", false, "text/markdown", null, 22, "resume.md"));

        var controller = new ProfileCvController(userManager.Object, aiService.Object)
        {
            ControllerContext = new ControllerContext { HttpContext = new DefaultHttpContext() }
        };

        var file = new FormFile(new MemoryStream(Encoding.UTF8.GetBytes("# CV\nBuilt APIs and UIs")), 0, 23, "file", "resume.md");
        var result = await controller.Upload(file);

        Assert.IsType<OkObjectResult>(result);
        Assert.Contains("Built APIs", user.ProfileCvText);
    }

    private static Mock<UserManager<ApplicationUser>> CreateUserManager()
    {
        var store = new Mock<IUserStore<ApplicationUser>>();
        return new Mock<UserManager<ApplicationUser>>(
            store.Object,
            Options.Create(new IdentityOptions()),
            new PasswordHasher<ApplicationUser>(),
            Array.Empty<IUserValidator<ApplicationUser>>(),
            Array.Empty<IPasswordValidator<ApplicationUser>>(),
            new UpperInvariantLookupNormalizer(),
            new IdentityErrorDescriber(),
            null!,
            new NullLogger<UserManager<ApplicationUser>>()
        );
    }
}