#!/bin/sh
true <<'LICENSE'
  Part of AREDN -- Used for creating Amateur Radio Emergency Data Networks
  Copyright (C) 2024 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.

LICENSE

cat > /tmp/canonical_config << __EOF__

require("nixio")
require("uci")
require("aredn.hardware")

local root = "/etc/config.mesh"
local DELETE = "__DELETE__"

function shell(cmd)
    local h = io.popen(cmd)
    local r = h:read("*a")
    h:close()
    return r ~= "" and r:gsub("^%s+", ""):gsub("%s+$", "") or null
end

function vtun_network()
    local mac = aredn.hardware.get_interface_mac("eth0")
    local a, b = mac:match("^..:..:..:..:(..):(..)$")
    return "172.31." .. "" .. tonumber(b, 16) .. "." .. ((tonumber(a, 16) * 4) % 256)
end

local config = {
    aredn = {
        alerts = {},
        dmz = {
            mode = shell("cat /etc/config/dmz-mode 2>/dev/null; rm -f /etc/config/dmz-mode") or 0
        },
        downloads = {
            firmware_aredn = "http://downloads.arednmesh.org",
            firmwarepath = DELETE,
            packages_default = "http://downloads.arednmesh.org",
            pkgs_core = DELETE,
            pkgs_base = DELETE,
            pkgs_arednpackages = DELETE,
            pkgs_packages = DELETE,
            pkgs_luci = DELETE,
            pkgs_routing = DELETE,
            pkgs_telephony = DELETE
        },
        iperf = {
            enable = 1
        },
        location = {
            lat = shell("head -1 /etc/latlon 2>/dev/null"),
            lon = shell("tail -1 /etc/latlon 2>/dev/null; rm -f /etc/latlon"),
            gridsquare = shell("head -1 /etc/gridsquare 2>/dev/null ; rm -f /etc/gridsquare"),
            map = "https://worldmap.arednmesh.org/#12/(lat)/(lon)",
            gps_enable = 1
        },
        lqm = {
            enable = 1,
            min_snr = 15,
            margin_snr = 1,
            rts_threshold = 1,
            min_distance = 0,
            max_distance = 80467,
            min_quality = 35,
            ping_penalty = 5,
            margin_quality = 1,
            min_routes = 8
        },
        map = DELETE,
        meshstatus = DELETE,
        notes = {},
        ntp = {
            period = "daily",
        },
        poe = {},
        remotelog = {},
        supernode = {
            enable = 0,
            support = 1
        },
        time = {
            ntp_enable = 1,
            gps_enable = 1,
            military = 0
        },
        tunnel = {
            weight = 1
        },
        usb = {},
        wan = {
            lan_dhcp_route = 1,
            lan_dhcp_defaultroute = 0,
            olsrd_gw = 0,
            ssh_access = 1,
            telnet_access = 1,
            web_access = 1
        },
        watchdog = {
            enable = 0,
        }
    },
    dhcp = {},
    dropbear = {},
    olsrd = {},
    snmpd = {},
    uhttpd = {},
    vtun = {
        defaults = {},
        options = {},
        network = {
            start = vtun_network()
        }
    },
    wireguard = {},
    xlink = {}
}

local cursor = uci.cursor(root)
for fn, f in pairs(config)
do
    if not nixio.fs.stat(root .. "/" .. fn) then
        io.open(root .. "/" .. fn, "w"):close()
    else
        cursor:add(fn, "__dummy__")
        cursor:delete(fn, "@__dummy__[0]")
        for k, v in pairs(cursor:get_all(fn))
        do
            local c = 0
            for k1, _ in pairs(v)
            do
                if not k1:match("^%.") then
                    c = c + 1
                end
            end
            if c == 0 then
                cursor:delete(fn, k)
            end
        end
    end
    for sn, s in pairs(f)
    do
        local san = "@" .. sn .. "[0]"
        if s == DELETE then
            cursor:delete(fn, san)
        else
            if not cursor:get(fn, san) then
                cursor:add(fn, sn)
            end
            for on, o in pairs(s)
            do
                if o == DELETE then
                    cursor:delete(fn, san, on)
                elseif not cursor:get(fn, san, on) then
                    cursor:set(fn, san, on, o)
                end
            end
        end
    end
    cursor:commit(fn)
end
__EOF__
/usr/bin/lua /tmp/canonical_config
rm -f /tmp/canonical_config