--
-- Copyright 2013 SipWise Team <development@sipwise.com>
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- This package is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
-- .
-- On Debian systems, the complete text of the GNU General
-- Public License version 3 can be found in "/usr/share/common-licenses/GPL-3".
--
local utils = require 'ngcp.utils'
local utable = utils.table
local NGCPPrefs = require 'ngcp.pref'
local NGCPDomainPrefs = require 'ngcp.dp'
local NGCPPeerPrefs = require 'ngcp.pp'
local NGCPUserPrefs = require 'ngcp.up'
local NGCPProfilePrefs = require 'ngcp.pprof'
local NGCPContractPrefs = require 'ngcp.cp'
local NGCPXAvp = require 'ngcp.xavp'

-- class NGCPRealPrefs
local NGCPRealPrefs = {
     __class__ = 'NGCPRealPrefs'
 }
local NGCPRealPrefs_MT = { __index = NGCPRealPrefs }

NGCPRealPrefs_MT.__tostring = function ()
        local xavp = NGCPXAvp:new('caller','real_prefs')
        local output = string.format("caller_real_prefs:%s\n", tostring(xavp))
        xavp = NGCPXAvp:new('callee','real_prefs')
        output = output .. string.format("callee_real_prefs:%s\n", tostring(xavp))
        return output
    end

    function NGCPRealPrefs:new()
        local t = {}
        -- creates xavp real
        NGCPPrefs.init("real_prefs")
        return setmetatable( t, NGCPRealPrefs_MT )
    end

    function NGCPRealPrefs:caller_contract_load(keys)
        return NGCPRealPrefs:_contract_load("caller", keys)
    end

    function NGCPRealPrefs:callee_contract_load(keys)
        return NGCPRealPrefs:_contract_load("callee", keys)
    end

    function NGCPRealPrefs:caller_peer_load(keys)
        return NGCPRealPrefs:_peer_load("caller", keys)
    end

    function NGCPRealPrefs:callee_peer_load(keys)
        return NGCPRealPrefs:_peer_load("callee", keys)
    end

    function NGCPRealPrefs:caller_usr_load(keys)
        return NGCPRealPrefs:_usr_load("caller", keys)
    end

    function NGCPRealPrefs:callee_usr_load(keys)
        return NGCPRealPrefs:_usr_load("callee", keys)
    end

    function NGCPRealPrefs:_contract_load(level, keys)
        local xavp = {
            contract  = NGCPContractPrefs:xavp(level),
        }
        local contract_keys = {}
        local values = sr.xavp.get(xavp.contract.name, 0, 0)
        for _,v in pairs(keys) do
            local value = values[v]
            if value then
                utable.add(contract_keys, v)
            end
        end
        return contract_keys
    end

    function NGCPRealPrefs:_peer_load(level, keys)
        local xavp = {
            peer  = NGCPPeerPrefs:xavp(level),
        }
        local peer_keys = {}
        local values = sr.xavp.get(xavp.peer.name, 0, 0)
        for _,v in pairs(keys) do
            local value = values[v]
            if value then
                utable.add(peer_keys, v)
            end
        end
        return peer_keys
    end

    function NGCPRealPrefs:_usr_load(level, keys)
        local xavp = {
            real = NGCPRealPrefs:xavp(level),
            dom  = NGCPDomainPrefs:xavp(level),
            prof = NGCPProfilePrefs:xavp(level),
            usr  = NGCPUserPrefs:xavp(level)
        }
        local real_values = {}
        local dom_values = sr.xavp.get(xavp.dom.name, 0, 0)
        local prof_values = sr.xavp.get(xavp.prof.name, 0, 0)
        local usr_values = sr.xavp.get(xavp.usr.name, 0, 0)
        for _,v in pairs(keys) do
            local value = usr_values[v]
            if not value then
                value = prof_values[v]
                if not value then
                    value = dom_values[v]
                end
            end
            if value then
                real_values[v] = value
            else
                sr.log("err", string.format("key:%s not in user, profile or domain", v))
            end
        end
        local real_keys = {}
        for k,v in pairs(real_values) do
            table.insert(real_keys, k)
            xavp.real(k, v)
        end
        return real_keys
    end

    function NGCPRealPrefs:xavp(level, l)
        if level ~= 'caller' and level ~= 'callee' then
            error(string.format("unknown level:%s. It has to be [caller|callee]", tostring(level)))
        end
        return NGCPXAvp:new(level,'real_prefs', l)
    end

    function NGCPRealPrefs:clean(vtype)
        if not vtype then
            NGCPRealPrefs:xavp('callee'):clean()
            NGCPRealPrefs:xavp('caller'):clean()
        else
            NGCPRealPrefs:xavp(vtype):clean()
        end
    end
-- class
return NGCPRealPrefs