using Easy.AuthorityManagement.Clean.Shared.IServices;
using Easy.AuthorityManagement.Clean.Shared.Modles;
using Easy.Authorization.Abstractions;
using Easy.DDD.Domain;
using Easy.Snowflakes;

namespace Easy.AuthorityManagement.Clean.Domain.Services;

public class PermissionGrantManager : DomainService, IPermissionGrantManager
{
    protected ISnowflakeIdGenerator SnowflakeIdGenerator => LazyServiceProvider.LazyGetService<ISnowflakeIdGenerator>();

    protected IRepository<PermissionGrant> PermissionGrantRepository => LazyServiceProvider.LazyGetService<IRepository<PermissionGrant>>();
    protected IPermissionDefinitionManager PermissionDefinitionManager => LazyServiceProvider.LazyGetService<IPermissionDefinitionManager>();

    public async Task<IEnumerable<string>> GetPermissionNamesAsync(params (string providerName, long providerKey)[] providerKeys)
    {
        var values = new List<string>();
        foreach (var providerKey in providerKeys)
        {
            var permissionNames = await PermissionGrantRepository.Set
                .Where(o => o.ProviderName == providerKey.providerName && o.ProviderKey == providerKey.providerKey)
                .Select(o => o.PermissionName)
                .ToListAsync();
            values.AddRange(permissionNames);
        }
        return values.Distinct();
    }

    public async Task<List<PermissionGroupModel>> GetPermissionGrantsAsync(string providerName, long providerKey)
    {
        var permissionNames = await GetPermissionNamesAsync((providerName, providerKey));

        var permissionGroups = GetPermissionGroups(permissionNames);

        return permissionGroups;
    }

    public List<PermissionGroupModel> GetPermissionGroups(IEnumerable<string> permissionNames)
    {
        var permissionGroups = new List<PermissionGroupModel>();

        foreach (var group in PermissionDefinitionManager.GetGroups())
        {
            var permissionGroupValueObject = new PermissionGroupModel()
            {
                Description = group.Description,
                DisplayName = group.DisplayName,
                GroupName = group.GroupName,
                Permissions = new List<PermissionModel>()
            };

            foreach (var permission in group.Permissions)
            {

                var per = new PermissionModel()
                {
                    Children = new List<PermissionModel>(),
                    Description = permission.Description,
                    DisplayName = permission.DisplayName,
                    IsEnabled = permission.IsEnabled,
                    PermissionName = permission.PermissionName,
                    IsGranted = permissionNames.Contains(permission.PermissionName)
                };

                foreach (var childPermission in permission.Children)
                {
                    per.Children.Add(new()
                    {
                        Description = childPermission.Description,
                        DisplayName = childPermission.DisplayName,
                        IsEnabled = childPermission.IsEnabled,
                        PermissionName = childPermission.PermissionName,
                        IsGranted = per.IsGranted == true || permissionNames.Contains(childPermission.PermissionName)
                    });
                }


                permissionGroupValueObject.Permissions.Add(per);
            }
            permissionGroups.Add(permissionGroupValueObject);
        }

        return permissionGroups;
    }

    //private static void SetPermissions(PermissionDefinition permissionDefinition, PermissionGroupValueObject permissionGroup)
    //{

    //    //父权限
    //    if (permissionDefinition.Parent == null)
    //    {
    //        //添加父权限
    //        permissionGroup.Permissions.Add(new PermissionValueObject()
    //        {
    //            PermissionName = permissionDefinition.PermissionName,
    //            Description = permissionDefinition.Description,
    //            DisplayName = permissionDefinition.DisplayName,
    //            IsEnabled = permissionDefinition.IsEnabled,

    //            Children = new List<PermissionValueObject>()
    //        });
    //    }
    //    //子权限
    //    else
    //    {
    //        //判断组里面是否有父权限
    //        var permission = permissionGroup.Permissions.FirstOrDefault(o => o.PermissionName == permissionDefinition.Parent.PermissionName);
    //        if (permission == null)
    //        {
    //            permissionGroup.Permissions.Add(new PermissionValueObject()
    //            {
    //                PermissionName = permissionDefinition.PermissionName,
    //                Description = permissionDefinition.Description,
    //                DisplayName = permissionDefinition.DisplayName,
    //                IsEnabled = permissionDefinition.IsEnabled,
    //                Children = new List<PermissionValueObject>()
    //            });
    //        }
    //        //添加子权限
    //        permission.Children.Add(new PermissionValueObject()
    //        {
    //            PermissionName = permissionDefinition.PermissionName,
    //            Description = permissionDefinition.Description,
    //            DisplayName = permissionDefinition.DisplayName,
    //            IsEnabled = permissionDefinition.IsEnabled,
    //        });
    //    }
    //}

    public async Task SetAsync(string permissionName, string providerName, long providerKey, bool isGranted)
    {
        var permission = PermissionDefinitionManager.Get(permissionName);
        When.Is(!permission.IsEnabled, $"这个权限 '{permissionName}' 被禁用!");

        if (isGranted)
        {
            var permissionGrant = new PermissionGrant(SnowflakeIdGenerator.Create(), permission.PermissionName, providerName, providerKey);
            await PermissionGrantRepository.Set.SingleInsertAsync(permissionGrant);
        }
        else
        {
            var permissionGrant = await PermissionGrantRepository.Set
                .Where(o => o.PermissionName == permissionName)
                .Where(o => o.ProviderKey == providerKey)
                .FirstOrDefaultAsync();
            if (permissionGrant == null)
            {
                return;
            }

            await PermissionGrantRepository.Set.SingleUpdateAsync(permissionGrant);
        }
    }
}