using System;
using System.Collections.Generic;
using System.Linq;
using LCU.Library.Internal.IncentiveApiModels.Common;

namespace LCU.Library.Internal.IncentiveApiModels.Entities
{
    public class AppUser : Auditable
    {
        public AppUser()
        {
            Departments = new List<UserDepartment>();
            Assignments = new List<UserAssignment>();
            Terminated = null;
        }

        public Guid Id { get; set; }
        public string AdEmail { get; set; }
        public int PersonId { get; set; }
        public string EmployeeId { get; set; }
        public string HomeDepartment { get; set; }
        public string BaseRole { get; set; }
        public string? ManagerKey { get; set; }
        [Obsolete("Start referring to UserDepartment.Role when possible. 09/08/2021")]
        public Role Role { get; set; }
        public List<UserPermission> AdditionalPermissions { get; set; }
        public string FullName { get; set; }
        public List<UserDepartment> Departments { get; set; }
        public List<UserAssignment> Assignments { get; set; }
        public DateTime? Terminated { get; set; }

        public bool UserHasPermission(Permission perm)
        {
            var departments = ActiveDepartmentsForRange(new MonthRange());
            foreach (var userDepartment in departments)
            {
                if (userDepartment.Role.Permissions.Any(x => x.Code == perm.Code))
                {
                    return true;
                }
            }
            return (AdditionalPermissions ?? new List<UserPermission>()).Any(x => x.Permission.Code == perm.Code);
        }

        public bool UserHasPermission(string permissionCode)
        {
            var departments = ActiveDepartmentsForRange(new MonthRange());
            foreach (var userDepartment in departments)
            {
                if (userDepartment.Role.Permissions.Any(x => x.Code == permissionCode))
                {
                    return true;
                }
            }
            return (AdditionalPermissions ?? new List<UserPermission>()).Any(x => x.Permission.Code == permissionCode);
        }

        public IEnumerable<UserDepartment> ActiveDepartmentsForRange(MonthRange monthRange)
        {
            return Departments.Where(department => department.StartDate.Date <= monthRange.EndTime.Date &&
                                                   (department.EndDate == null ||
                                                    monthRange.StartTime.Date <= department.EndDate.Value.Date));
        }

        public UserDepartment FindDepartmentForRole(Role role)
        {
            var departments = ActiveDepartmentsForRange(new MonthRange());
            return departments.FirstOrDefault(x => x.Role == role);
        }

        public UserDepartment FindHomeDepartment()
        {
            return Departments.FirstOrDefault(x => x.IsHome == true
                                                   && x.StartDate.Date <= DateTime.Today.Date &&
                                                   (x.EndDate == null || DateTime.Today.Date <= x.EndDate.Value.Date));
        }

        public bool HasDepartment(int departmentId)
        {
            return ActiveDepartmentsForRange(new MonthRange()).Any(x => x.DepartmentId == departmentId);
        }

        public bool HasRoleAnywhere(Role role)
        {
            var departments = ActiveDepartmentsForRange(new MonthRange());
            return departments.Any(userDepartment => userDepartment.Role == role);
        }

        public bool HasAnyRoleForActiveDepartment(int departmentId, Role[] roles)
        {
            var departments = ActiveDepartmentsForRange(new MonthRange());
            return departments.Any(userDepartment => roles.Contains(userDepartment.Role) && userDepartment.DepartmentId == departmentId);
        }

        public string AppUserFullNameInFromContextFormat()
        {
            if (!string.IsNullOrWhiteSpace(FullName))
            {
                var nameParts = FullName.Split(",");
                return $"{nameParts[1]} {nameParts[0]}";
            }
            return null;
        }
    }
}