using WebDrop.Core;

namespace WebDrop.Core.Tests;

public sealed class WorkspaceStructureTests
{
    [Fact]
    public void NewSpaceHasAnAtomicInitialChannelAndChangesPersist()
    {
        using var env = new TestEnv(); var endpoint = TestEnv.Endpoint(); var ch = env.Create(endpoint); var owner = ch.Owner(endpoint);
        var state = env.Service.GetWorkspace(ch.Id, owner);
        Assert.Equal("常规", Assert.Single(state.Channels).Name);
        var group = env.Service.CreateWorkspaceGroup(ch.Id, owner, "项目").Groups.Single();
        var changed = env.Service.CreateWorkspaceChannel(ch.Id, owner, "讨论", group.Id);
        Assert.Equal(group.Id, changed.Channels.Last().GroupId);
        var reloaded = env.Service.GetWorkspace(ch.Id, owner);
        Assert.Equal(changed.Revision, reloaded.Revision); Assert.Equal(2, reloaded.Channels.Count);
    }
    [Fact]
    public void InvalidAndCrossSpaceAssociationsRollback()
    {
        using var env = new TestEnv(); var endpoint = TestEnv.Endpoint(); var a = env.Create(endpoint); var b = env.Create(endpoint);
        var group = env.Service.CreateWorkspaceGroup(b.Id, b.Owner(endpoint), "其他空间").Groups.Single();
        var previous = env.Service.GetWorkspace(a.Id, a.Owner(endpoint));
        Assert.Throws<WebDropException>(() => env.Service.CreateWorkspaceChannel(a.Id, a.Owner(endpoint), "讨论", group.Id));
        Assert.Equal(previous.Revision, env.Service.GetWorkspace(a.Id, a.Owner(endpoint)).Revision);
        var first = previous.Channels.Single().Id;
        var second = env.Service.CreateWorkspaceChannel(a.Id, a.Owner(endpoint), "频道2", null).Channels.Last().Id;
        var folder = env.Service.CreateWorkspaceFolder(a.Id, a.Owner(endpoint), first, null, "目录").Folders.Single();
        Assert.Throws<WebDropException>(() => env.Service.CreateWorkspaceFolder(a.Id, a.Owner(endpoint), second, folder.Id, "跨频道目录"));
    }
    [Fact]
    public async Task MembersCannotMoveAnotherAccountsItemsAndTheServerSuppliesTheAuthor()
    {
        using var env = new TestEnv(); var ownerEp = TestEnv.Endpoint(); var memberEp = TestEnv.Endpoint(); var ch = env.Create(ownerEp);
        var member = ch.Member(memberEp) with { AccountName = "member" };
        env.Service.Join(ch.Id, member);
        var item = TestEnv.NewId();
        await env.Service.AppendFrameAsync(ch.Id, ch.Owner(ownerEp), TestEnv.Frame(item, 0, TestEnv.SmallEnc, TestEnv.EncPayload), null);
        var thread = env.Service.GetWorkspace(ch.Id, ch.Owner(ownerEp)).Channels.Single().Id;
        Assert.Throws<WebDropException>(() => env.Service.MoveWorkspaceItems(ch.Id, member, [item.ToBase64Url()], thread, null));
        var moved = env.Service.MoveWorkspaceItems(ch.Id, ch.Owner(ownerEp), [item.ToBase64Url()], thread, null);
        Assert.Equal("owner", moved.Locations.Single().AuthorAccount);
        Assert.Throws<WebDropException>(() => env.Service.MoveWorkspaceItems(ch.Id, ch.Owner(ownerEp), [TestEnv.NewId().ToBase64Url()], thread, null));
    }
    [Fact]
    public void AnExistingSpaceWithoutBackendStructureIsNotAutomaticallyMigrated()
    {
        using var env = new TestEnv(); var endpoint = TestEnv.Endpoint(); var ch = env.Create(endpoint);
        using var connection = new Microsoft.Data.Sqlite.SqliteConnection($"Data Source={Path.Combine(env.Dir, "test.db")}");
        connection.Open();
        using var delete = connection.CreateCommand(); delete.CommandText = "DELETE FROM workspace_structures WHERE space_id=$id";
        delete.Parameters.AddWithValue("$id", ch.Id.ToArray()); delete.ExecuteNonQuery();
        var empty = env.Service.GetWorkspace(ch.Id, ch.Owner(endpoint));
        Assert.Empty(empty.Channels); Assert.Equal(0, empty.Revision);
        var added = env.Service.CreateWorkspaceChannel(ch.Id, ch.Owner(endpoint), "新频道", null);
        Assert.Equal("新频道", added.Channels.Single().Name); Assert.Equal(1, added.Revision);
    }
    [Fact]
    public async Task AllowedGuestsCanPlaceTheirUploadsButCannotCreateBusinessStructure()
    {
        using var env = new TestEnv(); var ownerEp = TestEnv.Endpoint(); var guestEp = TestEnv.Endpoint(); var ch = env.Create(ownerEp);
        var guest = ch.Member(guestEp); env.Service.Join(ch.Id, guest);
        var item = TestEnv.NewId();
        await env.Service.AppendFrameAsync(ch.Id, guest, TestEnv.Frame(item, 0, TestEnv.SmallEnc, TestEnv.EncPayload), null);
        var channelId = env.Service.GetWorkspace(ch.Id, ch.Owner(ownerEp)).Channels.Single().Id;
        Assert.Single(env.Service.MoveWorkspaceItems(ch.Id, guest, [item.ToBase64Url()], channelId, null).Locations);
        Assert.Equal(ErrorCode.AccountRequired, Assert.Throws<WebDropException>(() => env.Service.CreateWorkspaceGroup(ch.Id, guest, "访客分组")).Code);
    }

}