if Code.ensure_loaded?(Ecto) do
defmodule Molasses.StorageAdapter.Postgres do
    alias Molasses.Models.Feature
    alias Molasses.Util
    def get(repo, key) do
        case repo.get_by(Feature, %{name: key}) do
            nil -> nil
            result -> result
        end
    end

    def set(repo, key, value) do
        case repo.get_by(Feature, %{name: key}) do
            nil ->
                result = Map.merge(%Feature{name: key},value)
                repo.insert!(result)
            result ->
                result = Feature.changeset(result,value)
                repo.update!(result)
        end
        
    end

    def remove(repo, key) do
        case repo.get_by(Feature, %{name: key}) do
            nil ->nil
            result ->
                repo.delete!(result)
                nil
        end
    end

    def activate(client, key) do
        set(client, key, %{
            name: key, 
            active: true,
            percentage: 100,
            users: ""
        })
    end

    def activate(client, key, percentage) when is_integer(percentage) do
        set(client, key, %{
            name: key, 
            active: true,
            percentage: percentage,
            users: ""
        })
    end

    def activate(client, key, users) when is_list(users) do
        activated_users = Enum.join(users,",")
        set(client, key, %{
            name: key, 
            percentage: 100,
            active: true,
            users: activated_users
        })
    end

    def activate(client, key, group) do
        set(client, key, %{
            name: key, 
            percentage: 100,
            users: group,
            active: true
        })
    end

    def deactivate(client, key) do
        set(client, key, %{
            name: key, 
            active: false,
            percentage: 0,
            users: ""
        })
    end

    


    def get_feature(repo, key) do
        case get(repo, key) do
            nil -> {:error, "failure"}
            %{name: key, active: active, percentage: percentage, users: users} -> 
                %{
                    name: key,
                    active: active,
                    percentage: percentage,
                    users: Util.convert_to_list(users),
                }
        end
    end
end
end