using System.Reflection;
using JobTrackerApi.Controllers;
using JobTrackerApi.Data;
using JobTrackerApi.Models;
using JobTrackerApi.Services;
using JobTrackerApi.Tests.TestSupport;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.DataProtection;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging.Abstractions;
using Xunit;

namespace JobTrackerApi.Tests;

public sealed class BackupControllerTests
{
    [Fact]
    public void Backup_controller_requires_local_authorization()
    {
        var attribute = typeof(BackupController).GetCustomAttribute<AuthorizeAttribute>();
        Assert.NotNull(attribute);
        Assert.Equal("local", attribute!.AuthenticationSchemes);
    }

    [Fact]
    public void Export_controller_requires_local_authorization()
    {
        var attribute = typeof(ExportController).GetCustomAttribute<AuthorizeAttribute>();
        Assert.NotNull(attribute);
        Assert.Equal("local", attribute!.AuthenticationSchemes);
    }

    [Fact]
    public async Task Encrypted_returns_file_payload_on_non_windows_platforms_too()
    {
        await using var db = CreateDb();
        db.Companies.Add(new Company { Name = "Acme", OwnerUserId = "user-1" });
        var job = new JobApplication { JobTitle = "Backend Developer", OwnerUserId = "user-1" };
        var otherJob = new JobApplication { JobTitle = "Other tenant role", OwnerUserId = "user-2" };
        db.JobApplications.AddRange(job, otherJob);
        await db.SaveChangesAsync();
        db.EmailSendAttempts.Add(new EmailSendAttempt
        {
            Id = Guid.NewGuid(),
            OwnerUserId = "user-1",
            JobApplicationId = job.Id,
            Provider = "gmail",
            ClientRequestId = Guid.NewGuid().ToString(),
            PayloadHash = new string('a', 64),
            Status = EmailSendStatuses.Sent,
            ProviderMessageId = "synthetic-message-id",
            CreatedAtUtc = DateTime.UtcNow,
            CompletedAtUtc = DateTime.UtcNow,
        });
        db.EmailDrafts.Add(new EmailDraft
        {
            Id = Guid.NewGuid(),
            OwnerUserId = "user-1",
            JobApplicationId = job.Id,
            Provider = "gmail",
            To = "recipient@example.test",
            Subject = "Synthetic export subject",
            BodyText = "Synthetic readable draft body.",
            ThreadId = "synthetic-thread",
            ClientRequestId = "00000000-0000-4000-8000-000000000123",
            Revision = 3,
            CreatedAtUtc = DateTime.UtcNow.AddMinutes(-5),
            UpdatedAtUtc = DateTime.UtcNow,
        });
        db.EmailDrafts.Add(new EmailDraft
        {
            Id = Guid.NewGuid(),
            OwnerUserId = "user-2",
            JobApplicationId = otherJob.Id,
            Provider = "microsoft",
            To = "other@example.test",
            Subject = "Other tenant subject",
            BodyText = "Other tenant private body.",
            ClientRequestId = "00000000-0000-4000-8000-000000000456",
            CreatedAtUtc = DateTime.UtcNow,
            UpdatedAtUtc = DateTime.UtcNow,
        });
        await db.SaveChangesAsync();

        var provider = DataProtectionProvider.Create(new DirectoryInfo(Path.Combine(Path.GetTempPath(), $"jobtracker-tests-{Guid.NewGuid():N}")));
        var controller = new BackupController(db, new NullLogger<BackupController>(), provider);

        var result = await controller.Encrypted(CancellationToken.None);

        var file = Assert.IsType<FileContentResult>(result);
        Assert.Equal("application/octet-stream", file.ContentType);
        Assert.EndsWith(".jtbackup", file.FileDownloadName);
        Assert.NotEmpty(file.FileContents);

        var protectedText = System.Text.Encoding.UTF8.GetString(file.FileContents);
        var json = Convert.FromBase64String(provider.CreateProtector("JobTrackerApi.Backup.v1").Unprotect(protectedText));
        using var document = System.Text.Json.JsonDocument.Parse(json);
        var attempt = Assert.Single(document.RootElement.GetProperty("Data").GetProperty("EmailSendAttempts").EnumerateArray());
        Assert.Equal("gmail", attempt.GetProperty("Provider").GetString());
        Assert.Equal("sent", attempt.GetProperty("Status").GetString());
        Assert.False(attempt.TryGetProperty("PayloadHash", out _));
        var draft = Assert.Single(document.RootElement.GetProperty("Data").GetProperty("EmailDrafts").EnumerateArray());
        Assert.Equal("recipient@example.test", draft.GetProperty("To").GetString());
        Assert.Equal("Synthetic export subject", draft.GetProperty("Subject").GetString());
        Assert.Equal("Synthetic readable draft body.", draft.GetProperty("BodyText").GetString());
        Assert.Equal("synthetic-thread", draft.GetProperty("ThreadId").GetString());
        Assert.Equal("00000000-0000-4000-8000-000000000123", draft.GetProperty("ClientRequestId").GetString());
        Assert.Equal(3, draft.GetProperty("Revision").GetInt64());
    }

    private static JobTrackerContext CreateDb()
    {
        return TestHostFactory.CreateInMemoryDb();
    }
}