using Fitness_core_BE.Interfaces.Services;
using Fitness_core_BE.Models.IOs;
using Fitness_core_BE.Services;

namespace Fitness_core_BE.Services.FunctionHandler
{
    public class ChatFunctionHandler
    {
        public readonly Dictionary<string, Func<object, Task<object>>> _functionHandler;

        public ChatFunctionHandler(IChatService chatService)
        {
            _functionHandler = new()
            {
                { "GetOrCreateChatAsync", chatService.GetOrCreateChatAsync },
                { "GetClientById", chatService.SendMessageAsync },
                { "RegisterClient", chatService.GetMessagesAsync }
            };
        }

        public async Task<ApiResponse<object>> Execute(ApiRequest request)
        {
            if (!_functionHandler.TryGetValue(request.FunctionName, out var handler))
            {
                return new ApiResponse<object>
                {
                    StatusCode = 404,
                    Message = $"Function '{request.FunctionName}' not found.",
                    Data = null
                };
            }
            try
            {
                var results = await handler(request.Payload);
                return new ApiResponse<object>
                {
                    StatusCode = 200,
                    Message = "success",
                    Data = results
                };
            }
            catch (UnauthorizedAccessException ex)
            {
                return new ApiResponse<object>
                {
                    StatusCode = 401,
                    Message = ex.Message,
                    Data = null
                };
            }
            catch (KeyNotFoundException ex)
            {
                return new ApiResponse<object>
                {
                    StatusCode = 400,
                    Message = ex.Message,
                    Data = null
                };
            }
            catch (InvalidOperationException ex)
            {
                return new ApiResponse<object>
                {
                    StatusCode = 400,
                    Message = ex.Message,
                    Data = null
                };
            }
            catch (Exception ex)
            {
                return new ApiResponse<object>
                {
                    StatusCode = 500,
                    Message = $"An error occurred: {ex.Message}",
                    Data = null
                };
            }
        }
    }
}