using Caspian.WorkflowFramework.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Text.Json.Nodes;
using System.Threading.Tasks;

namespace Caspian.WorkflowFramework.Utility
{
    public static class ConversionExtensions
    {
        public static WorkflowModel ConvertToWorkflowModel(this Dictionary<string, object?> dictionary)
        {
            var workflowModel = new WorkflowModel();

            if (dictionary == null || dictionary.Count == 0)
                return workflowModel;

            //Map dictionary values to WorkflowModel properties
            workflowModel.InstanceId = dictionary.ContainsKey(nameof(workflowModel.InstanceId))
                ? dictionary[nameof(workflowModel.InstanceId)]?.ToString()
                : null;

            workflowModel.Name = dictionary.ContainsKey(nameof(workflowModel.Name))
                ? dictionary[nameof(workflowModel.Name)]?.ToString()
                : null;

            workflowModel.IsComplete = dictionary.ContainsKey(nameof(workflowModel.IsComplete))
                ? bool.TryParse(dictionary[nameof(workflowModel.IsComplete)]?.ToString(), out var isComplete) && isComplete
                : false;

            workflowModel.UserId = dictionary.ContainsKey(nameof(workflowModel.UserId))
                ? long.TryParse(dictionary[nameof(workflowModel.UserId)]?.ToString(), out var userId) ? userId : (long?)null
                : null;

            //CurrentPageData
            if (dictionary.TryGetValue(nameof(workflowModel.CurrentPageData), out var currentPageDataObj) &&
                currentPageDataObj is not null)
            {
                switch (currentPageDataObj)
                {
                    case JsonElement je:
                        workflowModel.CurrentPageData = je;
                        break;

                    case JsonNode node:
                        // .NET 6+
                        workflowModel.CurrentPageData = JsonSerializer.SerializeToElement(node);
                        break;

                    case string s:
                        // اگر به صورت string JSON ذخیره شده
                        workflowModel.CurrentPageData = JsonSerializer.Deserialize<JsonElement>(s);
                        break;

                    default:
                        // هر نوع دیگری: serialize و تبدیل به JsonElement
                        workflowModel.CurrentPageData = JsonSerializer.SerializeToElement(currentPageDataObj);
                        break;
                }
            }
            else
            {
                workflowModel.CurrentPageData = null;
            }

            //NextPageData
            if (dictionary.TryGetValue(nameof(workflowModel.NextPageData), out var nextPageDataObj) &&
                nextPageDataObj is not null)
            {
                switch (nextPageDataObj)
                {
                    case JsonElement je:
                        workflowModel.NextPageData = je;
                        break;

                    case JsonNode node:
                        // .NET 6+
                        workflowModel.NextPageData = JsonSerializer.SerializeToElement(node);
                        break;

                    case string s:
                        // اگر به صورت string JSON ذخیره شده
                        workflowModel.NextPageData = JsonSerializer.Deserialize<JsonElement>(s);
                        break;

                    default:
                        // هر نوع دیگری: serialize و تبدیل به JsonElement
                        workflowModel.NextPageData = JsonSerializer.SerializeToElement(nextPageDataObj);
                        break;
                }
            }
            else
            {
                workflowModel.NextPageData = null;
            }

            workflowModel.NextPageUrl = dictionary.ContainsKey(nameof(workflowModel.NextPageUrl))
                ? dictionary[nameof(workflowModel.NextPageUrl)]?.ToString()
                : null;

            workflowModel.NextPageEventName = dictionary.ContainsKey(nameof(workflowModel.NextPageEventName))
                ? dictionary[nameof(workflowModel.NextPageEventName)]?.ToString()
                : null;

            return workflowModel;
        }
    }
}