using System.Security.Claims;
using System.Text.Json;
using JobTrackerApi.Controllers;
using JobTrackerApi.Data;
using JobTrackerApi.Models;
using JobTrackerApi.Services;
using JobTrackerApi.Tests.TestSupport;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Data.Sqlite;
using Microsoft.EntityFrameworkCore;
using Moq;
using Xunit;

namespace JobTrackerApi.Tests;

public sealed class CvExportRevisionTests
{
    [Fact]
    public async Task Explicit_blank_export_is_rejected_before_pdf_allocation()
    {
        var current = new Mock<ICurrentUserService>();
        current.SetupGet(x => x.UserId).Returns("owner");
        await using var db = new JobTrackerContext(new DbContextOptionsBuilder<JobTrackerContext>()
            .UseInMemoryDatabase(Guid.NewGuid().ToString()).Options, current.Object);
        var variants = new CvVariantService(db, new CareerProfileService(db), new ThemedCvRenderer());
        var settings = CvVariantSettingsJson.Deserialize("{\"sectionsExplicit\":true,\"includeProfileContact\":false,\"sections\":[]}");
        var cv = await variants.CreateAsync("owner", "Blank", null, settings, default);
        var user = new ApplicationUser { Id = "owner", FirstName = "Inherited name" };
        var users = TestHostFactory.CreateUserManager(user);
        users.Setup(x => x.GetUserAsync(It.IsAny<ClaimsPrincipal>())).ReturnsAsync(user);
        var pdf = new Mock<ICvPdfExporter>(MockBehavior.Strict);
        var controller = new CvVariantController(users.Object, variants, pdf.Object, Mock.Of<ISummarizerService>())
        { ControllerContext = new() { HttpContext = new DefaultHttpContext() } };
        var result = Assert.IsType<BadRequestObjectResult>(await controller.ExportPdf(cv.Id, default, 1));
        Assert.Equal("cv_empty_content", JsonSerializer.SerializeToElement(result.Value).GetProperty("code").GetString());
        pdf.VerifyNoOtherCalls();
    }

    [Theory]
    [InlineData(1, "owner", 409)]
    [InlineData(0, "owner", 409)]
    [InlineData(1, "other", 404)]
    [InlineData(2, "other", 404)]
    [InlineData(2, "owner", 200)]
    [InlineData(null, "owner", 200)]
    public async Task Export_checks_the_owned_render_revision_before_allocating_a_pdf(int? expectedVersion, string caller, int status)
    {
        await using var connection = new SqliteConnection("Data Source=:memory:");
        await connection.OpenAsync();
        var current = new Mock<ICurrentUserService>();
        current.SetupGet(x => x.UserId).Returns("owner");
        var options = new DbContextOptionsBuilder<JobTrackerContext>().UseSqlite(connection).Options;
        await using var seed = new JobTrackerContext(options, current.Object);
        await seed.Database.EnsureCreatedAsync();
        var variants = new CvVariantService(seed, new CareerProfileService(seed), new ThemedCvRenderer());
        var cv = await variants.CreateAsync("owner", "CV", null, new CvVariantSettings { Headline = "Old headline" }, default);
        await variants.SaveAsync("owner", cv.Id, null, new CvVariantSettings { Headline = "Saved headline" }, "manual", 1, default);

        current.SetupGet(x => x.UserId).Returns(caller);
        await using var db = new JobTrackerContext(options, current.Object);
        var renderer = new Mock<IThemedCvRenderer>();
        renderer.Setup(x => x.Render(It.IsAny<CvRenderModel>(), It.IsAny<CvTheme>(), It.IsAny<CvVariantSettings>()))
            .Returns((CvRenderModel model, CvTheme theme, CvVariantSettings settings) => new ThemedCvRenderer().Render(model, theme, settings));
        var service = new CvVariantService(db, new CareerProfileService(db), renderer.Object);
        var pdf = new Mock<ICvPdfExporter>();
        pdf.Setup(x => x.ExportAsync(caller, It.IsAny<TailoredCvRenderResult>(), It.IsAny<CancellationToken>()))
            .ReturnsAsync(new CvPdfArtifact("CV.pdf", "unused", [1, 2, 3]));
        var user = new ApplicationUser { Id = caller };
        var users = TestHostFactory.CreateUserManager(user);
        users.Setup(x => x.GetUserAsync(It.IsAny<ClaimsPrincipal>())).ReturnsAsync(user);
        var controller = new CvVariantController(users.Object, service, pdf.Object, Mock.Of<ISummarizerService>())
        { ControllerContext = new() { HttpContext = new DefaultHttpContext() } };

        var result = await controller.ExportPdf(cv.Id, default, expectedVersion);

        if (status == 200)
        {
            Assert.Equal(new byte[] { 1, 2, 3 }, Assert.IsType<FileContentResult>(result).FileContents);
            pdf.Verify(x => x.ExportAsync(caller, It.Is<TailoredCvRenderResult>(r => r.Html.Contains("Saved headline") && !r.Html.Contains("Old headline")), It.IsAny<CancellationToken>()), Times.Once);
        }
        else
        {
            if (status == 409)
            {
                var conflict = Assert.IsType<ObjectResult>(result);
                Assert.Equal(409, conflict.StatusCode);
                Assert.Equal("cv_revision_conflict", JsonSerializer.SerializeToElement(conflict.Value).GetProperty("code").GetString());
            }
            else Assert.IsType<NotFoundResult>(result);
            pdf.VerifyNoOtherCalls();
            renderer.VerifyNoOtherCalls();
        }
    }
}