using JobTrackerApi.Models;
using JobTrackerApi.Services;
using JobTrackerApi.Tests.TestSupport;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using Moq;
using Xunit;

namespace JobTrackerApi.Tests;

public sealed class AvatarRetentionTests
{
    [Fact]
    public async Task Hourly_retention_removes_old_orphans_but_preserves_current_recent_and_unrelated_files()
    {
        var root = Path.Combine(Path.GetTempPath(), "avatar-retention-" + Guid.NewGuid().ToString("N"));
        try
        {
            var paths = Paths(root);
            await using var db = TestHostFactory.CreateInMemoryDb();
            var current = await AvatarStorage.StageAsync(root, "owner", new byte[] { 1 }, default);
            var orphan = await AvatarStorage.StageAsync(root, "owner", new byte[] { 2 }, default);
            var recent = await AvatarStorage.StageAsync(root, "owner", new byte[] { 3 }, default);
            var missingOwner = await AvatarStorage.StageAsync(root, "deleted-owner", new byte[] { 4 }, default);
            var legacyOrphan = await AvatarStorage.StoreAsync(root, "owner", new byte[] { 5 }, "image/webp", default);
            var legacyCurrent = await AvatarStorage.StoreAsync(root, "legacy-owner", new byte[] { 6 }, "image/jpeg", default);
            var unrelated = Path.Combine(Path.GetDirectoryName(orphan[5..])!, "unrelated.png");
            await File.WriteAllTextAsync(unrelated, "keep");
            var now = DateTimeOffset.UtcNow;
            foreach (var file in new[] { current, orphan, missingOwner, legacyOrphan, legacyCurrent }) File.SetLastWriteTimeUtc(file[5..], now.AddDays(-2).UtcDateTime);
            db.Users.Add(new ApplicationUser { Id = "owner", UserName = "owner", AvatarImageDataUrl = current });
            db.Users.Add(new ApplicationUser { Id = "legacy-owner", UserName = "legacy-owner", AvatarImageDataUrl = legacyCurrent });
            await db.SaveChangesAsync();

            await CvImportRetentionHostedService.SweepAsync(db, paths, now, default);

            Assert.True(File.Exists(current[5..]));
            Assert.True(File.Exists(recent[5..]));
            Assert.True(File.Exists(unrelated));
            Assert.False(File.Exists(orphan[5..]));
            Assert.False(File.Exists(missingOwner[5..]));
            Assert.False(File.Exists(legacyOrphan[5..]));
            Assert.True(File.Exists(legacyCurrent[5..]));
        }
        finally { if (Directory.Exists(root)) Directory.Delete(root, true); }
    }

    [Fact]
    public async Task Account_inventory_includes_only_its_own_staged_portraits_even_without_a_current_avatar()
    {
        var root = Path.Combine(Path.GetTempPath(), "avatar-inventory-" + Guid.NewGuid().ToString("N"));
        try
        {
            var paths = Paths(root);
            await using var db = TestHostFactory.CreateInMemoryDb();
            var own = await AvatarStorage.StageAsync(root, "owner", new byte[] { 1 }, default);
            var other = await AvatarStorage.StageAsync(root, "other", new byte[] { 2 }, default);
            db.Users.Add(new ApplicationUser { Id = "owner", UserName = "owner" });
            await db.SaveChangesAsync();
            var inventory = await new AccountOwnedFileInventory(db, paths, Mock.Of<IAttachmentStorage>()).BuildAsync("owner", default);
            var avatar = Assert.Single(inventory.Files, file => file.Category == "avatar");
            Assert.Equal(own[5..], avatar.SourcePath);
            Assert.DoesNotContain(inventory.Files, file => file.SourcePath == other[5..]);
        }
        finally { if (Directory.Exists(root)) Directory.Delete(root, true); }
    }

    private static AppPaths Paths(string root) => new(
        new ConfigurationBuilder().AddInMemoryCollection(new Dictionary<string, string?> { ["Data:Root"] = root }).Build(),
        Mock.Of<IHostEnvironment>(environment => environment.ContentRootPath == root));

    [Theory]
    [InlineData("image/png")]
    [InlineData("image/jpeg")]
    [InlineData("image/webp")]
    public async Task Account_inventory_covers_exact_legacy_leftovers_after_portrait_replacement(string contentType)
    {
        var root = Path.Combine(Path.GetTempPath(), "avatar-legacy-inventory-" + Guid.NewGuid().ToString("N"));
        try
        {
            var paths = Paths(root);
            await using var db = TestHostFactory.CreateInMemoryDb();
            var legacy = await AvatarStorage.StoreAsync(root, "owner", new byte[] { 1 }, contentType, default);
            var current = await AvatarStorage.StageAsync(root, "owner", new byte[] { 2 }, default);
            db.Users.Add(new ApplicationUser { Id = "owner", UserName = "owner", AvatarImageDataUrl = current });
            await db.SaveChangesAsync();
            var inventory = await new AccountOwnedFileInventory(db, paths, Mock.Of<IAttachmentStorage>()).BuildAsync("owner", default);
            Assert.Contains(inventory.Files, file => file.SourcePath == legacy[5..]);
            Assert.Single(inventory.Files, file => file.SourcePath == current[5..]);
        }
        finally { if (Directory.Exists(root)) Directory.Delete(root, true); }
    }
}