--[[
    @object-name: ipv6
    @object-desc: ipv6设置
--]]

local uci = require "uci"
local rpc = require 'oui.rpc'

local M = {}

--[[
    @method-type: call
    @method-name: get_ipv6
    @method-desc: 获取ipv6的配置信息

    @out bool     enable              启用或禁用IPv6
    @out string   lan_mode            LAN接口模式为 native/relay/nat6/static [ relay 在前端显示为 Passthrough ] .
    @out string   lan_ip              当lan_mode为static时，为LAN接口的IPv6地址.
    @out bool     lan_dns_mode        LAN接口DNS服务器的模式，auto为true, manual为false.
    @out string   lan_dns1            当lan_dnsmode为manual时，LAN接口的第一个DNS服务器地址.
    @out string   lan_dns2            当lan_dnsmode为manual时，LAN接口的第二个DNS服务器地址.

    @out number   ?err_code           Error code,-1:获取信息失败.
    @out string   ?err_msg            Error message
    @in-example:  {"jsonrpc":"2.0","id":1,"method":"call","params":["","ipv6","get_ipv6"]}
    @out-example: {"jsonrpc": "2.0", "id": 1, "result": {"enable": false, "lan_dns_mode": true, "lan_mode": "nat6"}}
--]]
function M.get_ipv6()
    local c = uci.cursor()
    local enable = c:get("glipv6", "globals", "enabled") == "1"

    local lan_mode = c:get("glipv6", "lan", "mode")

    local lan_ip
    if lan_mode == "static" then
        lan_ip = c:get("glipv6", "lan", "ip6addr")
    end

    local lan_dns_mode = c:get("glipv6", "lan", "dnsmode")
    local lan_dns = c:get("glipv6", "lan", "dns")

    local ipv6 = {
        enable = enable,
        lan_mode = lan_mode,
        lan_ip = lan_ip,
        lan_dns_mode = lan_dns_mode == "auto"
    }

    if lan_dns and lan_dns_mode ~= "auto" then
        if type(string.find(lan_dns,"#")) ~= "nil" then
            ipv6.lan_dns1, ipv6.lan_dns2 = lan_dns:match("([^#]+)#([^#]+)")
        else
            ipv6.lan_dns1 = lan_dns
            ipv6.lan_dns2 = ""
        end
    end

    if type(enable) == "nil"  or type(lan_mode) ~= "string" or type(lan_dns_mode) == "nil"  then
        return rpc.ERROR_CODE_INVALID_PARAMS
    end

    return ipv6
end


--[[
    @method-type: call
    @method-name: set_ipv6
    @method-desc: 设置ipv6

    @in bool      enable              启用或禁用IPv6.[启用ipv6后，对应也会开启Repeater，Tethering，Modem 的ipv6]
    @in string    lan_mode            LAN接口模式为 native/relay/nat6/static [ relay 在前端显示为 Passthrough ].
    @in string    lan_ip              当lan_mode为static时，为LAN接口的IPv6地址.
    @in bool      lan_dns_mode        LAN接口DNS服务器的模式，auto为true, manual为false.
    @in string    lan_dns1            当lan_dnsmode为manual时，LAN接口的第一个DNS服务器地址.
    @in string    lan_dns2            当lan_dnsmode为manual时，LAN接口的第二个DNS服务器地址.

    @out number   ?err_code           Error code.
    @out string   ?err_msg            Error message
    @in-example:  {"jsonrpc":"2.0","method":"call","params":["","ipv6","set_ipv6",{"enable":true,"lan_mode":"static","lan_ip":"fdab:6a57:e8f5:10:d14f:d19b:a63c:d7a5","lan_dns_mode":true,"lan_dns1":"fdab:6a57:e8f5:10::1","lan_dns2":"fdab:6a57:e8f5:10::2"}],"id":1}
    @out-example: {"jsonrpc": "2.0", "id": 1, "result": null}
--]]
function M.set_ipv6(params)
    local c = uci.cursor()

    local enable = params.enable

    local lan_mode = params.lan_mode
    local lan_ip = params.lan_ip
    local lan_dns_mode = params.lan_dns_mode
    local lan_dns1 = params.lan_dns1
    local lan_dns2 = params.lan_dns2
    local lan_dns

    if type(enable) == "boolean" and enable then
        c:set("glipv6", "globals", "enabled", "1")
        c:set("glipv6", "lan", "interface")

        if lan_mode == "native" then
            c:set("glipv6", "lan", "mode", "native")
        elseif lan_mode == "relay" then
            c:set("glipv6", "lan", "mode", "relay")
        elseif lan_mode == "nat6" then
            c:set("glipv6", "lan", "mode", "nat6")
        elseif lan_mode == "static" then
            c:set("glipv6", "lan", "mode", "static")
            if type(lan_ip) == "string" then
                c:set("glipv6", "lan", "ip6addr", lan_ip)
            else
                return rpc.ERROR_CODE_INVALID_PARAMS
            end
        else
            return rpc.ERROR_CODE_INVALID_PARAMS
        end

        if type(lan_dns_mode) == "boolean" and not lan_dns_mode then
            c:set("glipv6", "lan", "dnsmode", "manual")
            if lan_dns2 then
                if lan_dns1:gsub("%s+", "") ~= "" and lan_dns2:gsub("%s+", "") ~= "" then
                    lan_dns = lan_dns1.."#"..lan_dns2
                    c:set("glipv6", "lan", "dns", lan_dns)
                elseif lan_dns2:gsub("%s+", "") ~= "" then
                    c:set("glipv6", "lan", "dns", lan_dns2)
                end
            elseif lan_dns1:gsub("%s+", "") ~= "" then
                c:set("glipv6", "lan", "dns", lan_dns1)
            else
                return rpc.ERROR_CODE_INVALID_PARAMS
            end
        elseif type(lan_dns_mode) == "boolean" and lan_dns_mode then
            c:set("glipv6", "lan", "dnsmode", "auto")
            c:delete("glipv6", "lan", "dns")
        else
            return rpc.ERROR_CODE_INVALID_PARAMS
        end

        c:commit("glipv6")
        ngx.timer.at(1.0, function()
            ngx.pipe.spawn({"/etc/init.d/gl_ipv6", "restart"}):wait()
            ngx.pipe.spawn({"/etc/init.d/shortcut-fe", "restart"}):wait()
        end)
    else
        c:set("glipv6", "globals", "enabled", "0")
        c:commit("glipv6")

        ngx.timer.at(1.0, function()
            ngx.pipe.spawn({"/etc/init.d/gl_ipv6", "stop"}):wait()
            ngx.pipe.spawn({"/etc/init.d/shortcut-fe", "restart"}):wait()
        end)

    end

end

return M