using System;
using System.Collections;
using System.Collections.Generic;
using BugNET.DataAccessLayer;
using System.Data;
using System.Web.Caching;
using System.Web;

namespace BugNET.BusinessLogicLayer
{
	/// <summary>
	/// A role definition for a user in the issue tracker.
	/// </summary>
	public class Role
	{
		#region Private Variables
			private int _Id;
			private string _Name;
			private int _ProjectId;
            private string _Description;
            private bool _AutoAssign;
		#endregion

		#region Constructors
            /// <summary>
            /// Initializes a new instance of the <see cref="T:Role"/> class.
            /// </summary>
            /// <param name="id">The id.</param>
            /// <param name="projectId">The project id.</param>
            /// <param name="name">The name.</param>
            /// <param name="description">The description.</param>
            /// <param name="autoAssign">if set to <c>true</c> [auto assign].</param>
		    public Role(int id,int projectId,string name,string description, bool autoAssign)
		    {
			    _Id = id;
			    _Name = name;
			    _ProjectId = projectId;
                _Description = description;
                _AutoAssign = autoAssign;
		    }

            /// <summary>
            /// Initializes a new instance of the <see cref="Role"/> class.
            /// </summary>
            /// <param name="projectId">The project id.</param>
            /// <param name="name">The name.</param>
            /// <param name="description">The description.</param>
            /// <param name="autoAssign">if set to <c>true</c> [auto assign].</param>
            public Role(int projectId, string name, string description, bool autoAssign) 
            {

                _Name = name;
                _ProjectId = projectId;
                _Description = description;
                _AutoAssign = autoAssign;
            }

		#endregion

		#region Properties
            /// <summary>
            /// Gets the id.
            /// </summary>
            /// <value>The id.</value>
			public int Id
			{
				get{return _Id;}
			}
            /// <summary>
            /// Gets or sets the name.
            /// </summary>
            /// <value>The name.</value>
			public string Name
			{
				get{return _Name;}
				set{_Name = value;}
			}
            /// <summary>
            /// Gets the project id.
            /// </summary>
            /// <value>The project id.</value>
			public int ProjectId
			{
				get{return _ProjectId;}
			}

            /// <summary>
            /// Gets the description.
            /// </summary>
            /// <value>The description.</value>
            public string Description
            {
                get { return _Description; }
                set { _Description = value; }
            }

            /// <summary>
            /// Gets a value indicating whether [auto assign].
            /// </summary>
            /// <value><c>true</c> if [auto assign]; otherwise, <c>false</c>.</value>
            public bool AutoAssign
            {
                get { return _AutoAssign; }
                set { _AutoAssign = value; }
            }
		#endregion

        #region Instance Methods
            /// <summary>
            /// Saves the role object
            /// </summary>
            /// <returns><c>true</c> if successful</returns>
            public bool Save()
            {
                if (Id <= Globals.NewId)
                {
                    int TempId = DataProviderManager.Provider.CreateNewRole(this);
                    if (TempId > 0)
                    {
                        _Id = TempId;
                        return true;
                    }
                    else
                        return false;
                }
                else
                {
                    return DataProviderManager.Provider.UpdateRole(this);
                }
            }

            #endregion

		#region Static Methods
            /// <summary>
            /// Associates the default roles created at installation to a project.
            /// </summary>
            /// <param name="projectId">The project id.</param>
            public static void CreateDefaultProjectRoles(int projectId)
            {
                if (projectId <= Globals.NewId)
                    throw (new ArgumentOutOfRangeException("projectId"));
               
                foreach (string role in Globals.DefaultRoles)
                {
                   Role r = new Role(projectId,role,role,false);
                   int NewRoleId = DataProviderManager.Provider.CreateNewRole(r);

                   int[] Permissions = null;
                   //add permissions to roles
                   switch (role)
                   {
                       case "Project Administrators":
                           Permissions = Globals.AdministratorPermissions;
                           break;
                       case "Read Only":
                           Permissions = Globals.ReadOnlyPermissions;
                           break;
                       case "Reporter":
                           Permissions = Globals.ReporterPermissions;
                           break;
                       case "Developer":
                           Permissions = Globals.DeveloperPermissions;
                           break;
                       case "Quality Assurance":
                           Permissions = Globals.QualityAssurancePermissions;
                           break;
                   }

                   foreach (int i in Permissions)
                   {
                       Role.AddRolePermission(NewRoleId, i);
                   }
                }                 
            }

			/// <summary>
			/// Get all roles by project
			/// </summary>
			/// <param name="projectId"></param>
			/// <returns>List of role objects</returns>
            public static List<Role> GetRolesByProject(int projectId)
			{
				if (projectId <= Globals.NewId )
					throw (new ArgumentOutOfRangeException("projectId"));

                return DataProviderManager.Provider.GetRolesByProject(projectId);
			}

            /// <summary>
            /// Gets the role by id.
            /// </summary>
            /// <param name="roleId">The role id.</param>
            /// <returns></returns>
            public static Role GetRoleById(int roleId)
            {
                if (roleId <= Globals.NewId)
                    throw (new ArgumentOutOfRangeException("roleId"));

                return DataProviderManager.Provider.GetRoleById(roleId);
            }

            /// <summary>
            /// Creates the role.
            /// </summary>
            /// <param name="roleName">Name of the role.</param>
            /// <param name="projectId">The project id.</param>
            /// <param name="description">The description.</param>
            /// <param name="autoAssign">if set to <c>true</c> [auto assign].</param>
            /// <returns></returns>
            public static int CreateRole(string roleName,int projectId,string description, bool autoAssign)
            {
                if (!Role.RoleExists(roleName,projectId))
                {
                    Role r = new Role(projectId,roleName,description,autoAssign);
                    r.Save();
                    return r.Id;
                }
               
                return 0;
            }

            /// <summary>
            /// Roles the exists.
            /// </summary>
            /// <param name="roleName">Name of the role.</param>
            /// <param name="projectId">The project id.</param>
            /// <returns></returns>
            public static bool RoleExists(string roleName, int projectId)
            {
                if (projectId <= 0)
                    throw new ArgumentOutOfRangeException("projectId");
                if (String.IsNullOrEmpty(roleName))
                    throw new ArgumentOutOfRangeException("roleName");

                return DataProviderManager.Provider.RoleExists(roleName, projectId);
            }

            /// <summary>
            /// Gets the roles for user.
            /// </summary>
            /// <param name="userName">Name of the user.</param>
            /// <param name="projectId">The project id.</param>
            /// <returns></returns>
            public static List<Role> GetRolesForUser(string userName, int projectId)
            {
                if (String.IsNullOrEmpty(userName))
                    throw new ArgumentOutOfRangeException("userName");

                 return DataProviderManager.Provider.GetRolesByUserName(userName, projectId);
            }

            /// <summary>
            /// Gets the roles for user.
            /// </summary>
            /// <param name="userName">Name of the user.</param>
            /// <returns></returns>
            public static List<Role> GetRolesForUser(string userName)
			{
                if (String.IsNullOrEmpty(userName))
                    throw new ArgumentOutOfRangeException("userName");

                return DataProviderManager.Provider.GetRolesByUserName(userName);
			}

            //// <summary>
            //// Gets the roles for user.
            //// </summary>
            //// <returns>string array of role names</returns>
            //public static string[] GetRolesForUser()
            //{
            //    
               
            //    //return Role.GetRolesForUser();
            //}

            /// <summary>
            /// Gets all roles.
            /// </summary>
            /// <returns></returns>
            public static List<Role> GetAllRoles()
            {
                return DataProviderManager.Provider.GetAllRoles();
            }

            /// <summary>
            /// Adds a user to a role
            /// </summary>
            /// <param name="userName">Name of the user.</param>
            /// <param name="roleId">The role id.</param>
			public static void AddUserToRole(string userName,int roleId)
			{
                if (String.IsNullOrEmpty(userName))
                    throw new ArgumentOutOfRangeException("userName");
                if (roleId <= Globals.NewId)
                    throw new ArgumentOutOfRangeException("roleId");

                DataProviderManager.Provider.AddUserToRole(userName, roleId);
                
			}

            /// <summary>
            /// Removes a user from a role
            /// </summary>
            /// <param name="userName">Name of the user.</param>
            /// <param name="roleId">The role id.</param>
            public static void RemoveUserFromRole(string userName, int roleId)
            {
                if (String.IsNullOrEmpty(userName))
                    throw new ArgumentOutOfRangeException("userName");
                if (roleId <= 0)
                    throw new ArgumentOutOfRangeException("roleId");

                DataProviderManager.Provider.RemoveUserFromRole(userName, roleId);
            }

            /// <summary>
            /// Deletes the role.
            /// </summary>
            /// <param name="roleId">The role id.</param>
            /// <returns></returns>
			public static bool DeleteRole(int roleId)
			{
                if (roleId <= 0)
                    throw new ArgumentOutOfRangeException("roleId");

                return DataProviderManager.Provider.DeleteRole(roleId);
			}

			/// <summary>
			/// Retreives the Role Permissions DataView from the cache if exists, otherwise loads 
			/// it into the cache
			/// </summary>
			/// <returns>Role Permissions DataView</returns>
			public static List<RolePermission> GetRolePermission()
			{
                List<RolePermission> permissions;
                permissions = (List<RolePermission>)HttpContext.Current.Cache["RolePermission"];
				if(permissions == null)
				{
                    permissions = DataProviderManager.Provider.GetAllPermissions();
					HttpContext.Current.Cache.Insert("RolePermission",permissions);
				}
				return permissions;

			}

			/// <summary>
			/// Checks the Role Permission DataView if a permission row exists
			/// </summary>
			/// <param name="projectId"></param>
			/// <param name="role"></param>
			/// <param name="permissionKey"></param>
			/// <returns>[true] if row exists</returns>
			public static bool RoleHasPermission(int projectId, string role, string permissionKey)
			{
				//check if the role for a project has permission
                RolePermission permission = Role.GetRolePermission().Find(delegate(RolePermission p) {return  p.ProjectId == projectId && p.RoleName == role && p.PermissionKey == permissionKey; });
                if (permission != null)
					return true;

				return false;
			}

            /// <summary>
            /// Gets all permissions by role
            /// </summary>
            /// <param name="roleId">The role id.</param>
            /// <returns>List of permission objects</returns>
            public static List<Permission> GetPermissionsByRoleId(int roleId)
			{
				if (roleId <= Globals.NewId)
					throw (new ArgumentOutOfRangeException("roleId"));

                return DataProviderManager.Provider.GetPermissionsByRoleId(roleId);
			}

            /// <summary>
            /// Deletes a permission object from a role
            /// </summary>
            /// <param name="roleId">The role id.</param>
            /// <param name="permissionId">The permission id.</param>
            /// <returns>[true] if successfull</returns>
			public static bool DeleteRolePermission(int roleId, int permissionId)
			{
				if (roleId <= Globals.NewId)
					throw (new ArgumentOutOfRangeException("roleId"));
				if (permissionId <= Globals.NewId )
					throw (new ArgumentOutOfRangeException("permissionId"));

                if (DataProviderManager.Provider.DeletePermission(roleId, permissionId))
				{
					HttpContext.Current.Cache.Remove("Permission");
					return true;
				}				
				return false;
			}

            /// <summary>
            /// Adds a permission object to a role
            /// </summary>
            /// <param name="roleId">The role id.</param>
            /// <param name="permissionId">The permission id.</param>
            /// <returns>[true] if successfull</returns>
			public static bool AddRolePermission(int roleId, int permissionId)
			{
                if (roleId <= Globals.NewId)
					throw (new ArgumentOutOfRangeException("roleId"));
				if (permissionId <= Globals.NewId )
					throw (new ArgumentOutOfRangeException("permissionId"));

                if (DataProviderManager.Provider.AddPermission(roleId, permissionId))
				{
					HttpContext.Current.Cache.Remove("Permission");
					return true;
				}

				return false;
			}
		#endregion
	}
}