module("luci.model.cbi.gpsysupgrade.api", package.seeall)
local fs = require "nixio.fs"
local sys = require "luci.sys"
local uci = require"luci.model.uci".cursor()
local util = require "luci.util"

appname = "gpsysupgrade"
curl = "/usr/bin/curl"
curl_args = {"-skfL", "--connect-timeout 3", "--retry 3"}
wget = "/usr/bin/wget"
wget_args = {"--no-check-certificate", "--quiet", "--timeout=100", "--tries=3"}
command_timeout = 40
LEDE_BOARD = nil
DISTRIB_TARGET = nil

function _unpack(t, i)
    i = i or 1
    if t[i] ~= nil then return t[i], _unpack(t, i + 1) end
end

function exec(cmd, args, writer, timeout)
    local os = require "os"
    local nixio = require "nixio"

    local fdi, fdo = nixio.pipe()
    local pid = nixio.fork()

    if pid > 0 then
        fdo:close()

        if writer or timeout then
            local starttime = os.time()
            while true do
                if timeout and os.difftime(os.time(), starttime) >= timeout then
                    nixio.kill(pid, nixio.const.SIGTERM)
                    return 1
                end

                if writer then
                    local buffer = fdi:read(2048)
                    if buffer and #buffer > 0 then
                        writer(buffer)
                    end
                end

                local wpid, stat, code = nixio.waitpid(pid, "nohang")

                if wpid and stat == "exited" then return code end

                if not writer and timeout then nixio.nanosleep(1) end
            end
        else
            local wpid, stat, code = nixio.waitpid(pid)
            return wpid and stat == "exited" and code
        end
    elseif pid == 0 then
        nixio.dup(fdo, nixio.stdout)
        fdi:close()
        fdo:close()
        nixio.exece(cmd, args, nil)
        nixio.stdout:close()
        os.exit(1)
    end
end

function auto_get_model()
    local arch = nixio.uname().machine or ""
    if fs.access("/etc/openwrt_release") then
		if arch == "x86_64" then
		model = "x86_64"
		else
        local boardinfo = luci.util.ubus("system", "board") or { }
		model = boardinfo.model
		end
    end
    return util.trim(model)
end