using static MFiles.Grpc.Samples.MFilesValues;

namespace MFiles.Grpc.Samples.Recipes;

/// <summary>
/// Recipe "workflow-state": read a document's workflow states and transitions, then move it to
/// another state.
/// Arguments: [workflow ID, default 107] [initial state ID, default 137] [target state ID, default 141]
/// [--keep] to leave the test document in the vault (it is deleted otherwise).
/// </summary>
public static class WorkflowState
{
    public static async Task RunAsync(MFilesSettings settings, string[] args)
    {
        int workflowId = RecipeHelpers.IntArg(args, 0, 107);   // "Contract Approval Workflow"
        int initialState = RecipeHelpers.IntArg(args, 1, 137); // "Draft"
        int targetState = RecipeHelpers.IntArg(args, 2, 141);  // "Rejected"
        await using var connection = await MFilesConnection.ConnectAsync(settings, RecipeHelpers.ClientName);
        var objects = new IRPCObjectOperations.IRPCObjectOperationsClient(connection.CallInvoker);

        // A test document in the workflow: property 38 "Workflow" (value list 7) and
        // property 39 "Workflow State" (value list 8).
        var created = await RecipeHelpers.CreateTestDocumentAsync(connection, "workflow-state",
            Property(38, Lookup(7, workflowId)), Property(39, Lookup(8, initialState)));
        var objId = created.ObjectInfo.ObjId;
        Console.WriteLine($"Created {RecipeHelpers.Describe(created)}");
        try
        {
            // [START workflow-state]
            // The states and transitions of the workflow, with what this user may select for
            // this object in its current state.
            var objVer = ObjVer(objId.Type, objId.ItemId.InternalId, created.VersionInfo.Version.InternalVersion);
            var workflow = await objects.GetWorkflowStatesAndTransitionsAsync(new GetWorkflowStatesAndTransitionsRequest
            {
                WorkflowId = workflowId,
                CurrentState = Lookup(8, initialState),
                ObjVer = objVer,
            });
            foreach (var state in workflow.States)
                Console.WriteLine($"  State {state.Id} {state.Name}: selectable {state.CanCurrentUserSelect}");
            foreach (var transition in workflow.Transitions)
            {
                Console.WriteLine($"  Transition {transition.Id} {transition.Name}: {transition.FromStateId} -> " +
                    $"{transition.ToStateId}, selectable {transition.CanCurrentUserSelect}");
            }

            // Change the state by setting property 39 "Workflow State" on the version just read.
            var updated = await objects.SetPropertiesAsync(new SetPropertiesRequest
            {
                ObjVer = objVer,
                AllowModifyingCheckedInObject = true,
                FailIfNewerVersionExists = true,
                Properties = { Property(39, Lookup(8, targetState)) },
            });
            // [END workflow-state]

            var state39 = updated.ObjectInfo.LatestVersion.Properties.Single(p => p.PropertyDef == 39);
            Console.WriteLine($"State is now {RecipeHelpers.FormatValue(state39.Value)}, version " +
                updated.ObjectInfo.LatestVersion.ObjectVersion.VersionInfo.Version.InternalVersion);
        }
        finally
        {
            if (!RecipeHelpers.Keep(args))
                await RecipeHelpers.DeleteAsync(connection, objId);
        }
    }
}