#! /usr/bin/lua
--[[

	Part of AREDN -- Used for creating Amateur Radio Emergency Data Networks
	Copyright (C) 2021 Tim Wilkinson
	See Contributors file for additional contributors

	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 version 3 of the License.

	This program 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/>.

	Additional Terms:

	Additional use restrictions exist on the AREDN(TM) trademark and logo.
		See AREDNLicense.txt for more info.

	Attributions to the AREDN Project must be retained in the source code.
	If importing this code into a new or existing project attribution
	to the AREDN project must be added to the source code.

	You must not misrepresent the origin of the material contained within.

	Modified versions must be modified to attribute to the original source
	and be marked in reasonable ways as differentiate it from the original
	version

--]]

require("aredn.utils")
local aredn_info = require("aredn.info")
require("aredn.hardware")
require("luci.sys")

local needsrun = aredn_info.get_nvram("nodeupgraded")
if needsrun == "" or needsrun == "0" then
    print "Node not upgraded, exiting"
    os.exit(0)
end

local config = aredn_info.get_nvram("config")
if config ~= "mesh" then
    print "This node was previously configured in non-mesh mode and is no longer implemented.  Returning to 'firstboot'."
    local f = io.popen("firstboot -y && reboot")
    f:read("*a")
    f:close()
    os.exit(1)
end

local node = aredn_info.get_nvram("node")
local mac2 = mac_to_ip(aredn.hardware.get_interface_mac(aredn.hardware.get_iface_name("wifi")), 0)
local dtdmac = mac_to_ip(aredn.hardware.get_interface_mac(aredn.hardware.get_iface_name("lan")), 0)

local cfg = {}
local defaultcfg = {}

local tmp = io.open("/tmp/.mesh_setup", "w")
if not tmp then
    print "Failed to create temp file"
    os.exit(-1)
end

for line in io.lines("/etc/config.mesh/_setup")
do
    if not (line:match("^%s*#") or line:match("^%s*$")) then
        local k, v = line:match("^(%S+)%s*=%s*(.*)%s*$")
        cfg[k] = v
    end
end

for line in io.lines("/etc/config.mesh/_setup.default")
do
    if not (line:match("^%s*#") or line:match("^%s*$")) then
        line = line:gsub("<NODE>", node):gsub("<MAC2>", mac2):gsub("<DTDMAC>", dtdmac)
        local k, v = line:match("^(%S+)%s*=%s*(.*)%s*$")
        defaultcfg[k] = v
    end
end

-- set variables in special conditions
if cfg.dmz_mode == "0" or cfg.wan_proto == "disabled" then
    cfg.olsrd_gw = "0"
end
-- end special condition overrides

local keys = {}
for k, v in pairs(defaultcfg)
do
    keys[#keys + 1] = k
end
table.sort(keys)
for _, key in ipairs(keys)
do
    local v = cfg[key]
    if v then
        tmp:write(key .. " = " .. v .. "\n")
    else
        tmp:write(key .. " = " .. defaultcfg[key] .. "\n")
    end
end

-- specific settings for variables that are not in the default config but are added by the system
for _, key in ipairs({ 'dmz_dhcp_end', 'dmz_dhcp_limit', 'dmz_dhcp_start', 'dmz_lan_ip', 'dmz_lan_mask', 'wifi_rxant', 'wifi_txant', 'wan_gw', 'wan_ip', 'wan_mask' })
do
    local v = cfg[key]
    if v then
        tmp:write(key .. " = " .. v .. "\n")
    end
end

tmp:close()

filecopy("/tmp/.mesh_setup", "/etc/config.mesh/_setup")
os.remove("/tmp/.mesh_setup")

os.execute("/usr/local/bin/node-setup -a mesh")

aredn_info.set_nvram("nodeupgraded", "0")
print "Rebooting node"
luci.sys.reboot()