--
-- Licensed to the Apache Software Foundation (ASF) under one or more
-- contributor license agreements.  See the NOTICE file distributed with
-- this work for additional information regarding copyright ownership.
-- The ASF licenses this file to You under the Apache License, Version 2.0
-- (the "License"); you may not use this file except in compliance with
-- the License.  You may obtain a copy of the License at
--
--     http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
local core = require("apisix.core")
local get_routes = require("apisix.router").http_routes
local resource = require("apisix.admin.resource")
local schema_plugin = require("apisix.admin.plugins").check_schema
local type = type
local tostring = tostring
local ipairs = ipairs


local function check_conf(id, conf, need_id, schema)
    local ok, err = core.schema.check(schema, conf)
    if not ok then
        return nil, {error_msg = "invalid configuration: " .. err}
    end

    local ok, err = schema_plugin(conf.plugins)
    if not ok then
        return nil, {error_msg = err}
    end

    return true
end


local function delete_checker(id)
    local routes, routes_ver = get_routes()
    if routes_ver and routes then
        for _, route in ipairs(routes) do
            if type(route) == "table" and route.value
               and route.value.plugin_config_id
               and tostring(route.value.plugin_config_id) == id then
                return 400, {error_msg = "can not delete this plugin config,"
                                         .. " route [" .. route.value.id
                                         .. "] is still using it now"}
            end
        end
    end

    return nil, nil
end


return resource.new({
    name = "plugin_configs",
    kind = "plugin config",
    schema = core.schema.plugin_config,
    checker = check_conf,
    unsupported_methods = {"post"},
    delete_checker = delete_checker
})