using System;
using System.Collections.Generic;
using System.Linq;
using Step.Model.DatabaseModels;
using Step.Model.DTOModels;
using static CMS_CORE_Library.DataStructures;

namespace Step.Database.Controllers
{
    public class FunctionsAccessController : IDisposable
    {
        private DatabaseContext dbCtx;

        public FunctionsAccessController()
        {
            // Initialize database context
            dbCtx = new DatabaseContext();
        }

        public void Dispose()
        {
            // Clear database context
            dbCtx.Dispose();
        }

        public FunctionAccessModel FindEnabledFunctionByName(string functionName)
        {
            return dbCtx
                .FunctionsAccess
                .Where(x => x.Name == functionName && x.Enabled == true) // Find by name and enabled functions
                .FirstOrDefault();
        }

        public List<DTOFunctionAccessModel> GetFunctionAccess(int roleLevel)
        {
            return dbCtx
                .FunctionsAccess
                .Select(f => new DTOFunctionAccessModel() // Convert from database model to data transfer model
                {
                    Id = f.FunctionAccessId,
                    Name = f.Name,
                    Area = f.Area,
                    Enabled = f.Enabled,
                    CanRead = f.ReadLevelMin < roleLevel,
                    CanWrite = f.WriteLevelMin < roleLevel
                })
                .ToList();
        }

        public List<DTORuntimeFunctionAccessModel> GetFunctionsMappedWithPlc(List<FunctionalityModel> functionalityList)
        {
            return dbCtx
                .FunctionsAccess
                .ToList() // Find all function access
                .Select(f => new DTORuntimeFunctionAccessModel()
                {
                    Id = f.FunctionAccessId,
                    Name = f.Name,
                    Area = f.Area,
                    Enabled = GetIfFunctionalityIsActive(functionalityList, f.PlcId, f.Enabled) // Get new enabled data
                })
                .ToList();
        }

        private bool GetIfFunctionalityIsActive(List<FunctionalityModel> functionalityList, int id, bool functionAccessIsEnabled)
        {
            // If id is not mapped or function is false by database config return
            if (id == 0 || !functionAccessIsEnabled)
                return functionAccessIsEnabled;
            // Return PLC data
            return functionalityList[id - 1].isActive;
        }
    }
}