local Generic = require("device/generic/device") -- <= look at this file!
local PluginShare = require("pluginshare")
local TimeVal = require("ui/timeval")
local ffi = require("ffi")
local logger = require("logger")

local function yes() return true end
local function no() return false end

local SonyPRSTUX = Generic:new{
    model = "Sony PRSTUX",
    isSonyPRSTUX = yes,
    hasKeys = yes,
    hasOTAUpdates = yes,
    hasWifiManager = yes,
    canReboot = yes,
    canPowerOff = yes,
    usbPluggedIn = false,
}



-- sony's driver does not inform of ID, so we overwrite the TOUCH_MAJOR
-- event to fake an ID event. a width == 0 means the finger was lift.
-- after all events are received, we reset the counter

local next_touch_id = 0
local ABS_MT_TRACKING_ID = 57
local ABS_MT_TOUCH_MAJOR = 48
local EV_SYN = 0
local EV_ABS = 3
local SYN_REPORT = 0
local SYN_MT_REPORT = 2
local adjustTouchEvt = function(self, ev)
    ev.time = TimeVal:now()
    logger.dbg('updated time to ',ev.time)

    if ev.type == EV_ABS and ev.code == ABS_MT_TOUCH_MAJOR then
        ev.code = ABS_MT_TRACKING_ID
        if ev.value ~= 0 then
            ev.value = next_touch_id
        else
            ev.value = -1
        end

        next_touch_id = next_touch_id + 1

        logger.dbg('adjusted id: ', ev.value)
    elseif ev.type == EV_SYN and ev.code == SYN_REPORT then
        next_touch_id = 0
        logger.dbg('reset id: ', ev.code, ev.value)
        ev.code = SYN_MT_REPORT
    elseif ev.type == EV_SYN and ev.code == SYN_MT_REPORT then
        ev.code = SYN_REPORT
    end
end

function SonyPRSTUX:init()
    self.screen = require("ffi/framebuffer_mxcfb"):new{device = self, debug = logger.dbg}
    self.powerd = require("device/sony-prstux/powerd"):new{device = self}
    self.input = require("device/input"):new{
        device = self,
        event_map = require("device/sony-prstux/event_map"),
    }

    self.input.open("/dev/input/event0") -- Keys
    self.input.open("/dev/input/event1") -- touchscreen
    self.input.open("/dev/input/event2") -- power button
    self.input.open("fake_events") -- usb plug-in/out and charging/not-charging
    self.input:registerEventAdjustHook(adjustTouchEvt)

    local rotation_mode = self.screen.ORIENTATION_LANDSCAPE_ROTATED
    self.screen.native_rotation_mode = rotation_mode
    self.screen.cur_rotation_mode = rotation_mode

    Generic.init(self)
end

function SonyPRSTUX:supportsScreensaver() return true end

function SonyPRSTUX:setDateTime(year, month, day, hour, min, sec)
    if hour == nil or min == nil then return true end
    local command
    if year and month and day then
        command = string.format("date -s '%d-%d-%d %d:%d:%d'", year, month, day, hour, min, sec)
    else
        command = string.format("date -s '%d:%d'",hour, min)
    end
    if os.execute(command) == 0 then
        os.execute('hwclock -u -w')
        return true
    else
        return false
    end
end

function SonyPRSTUX:intoScreenSaver()
    local Screensaver = require("ui/screensaver")
    if self.screen_saver_mode == false then
        Screensaver:show()
    end
    self.powerd:beforeSuspend()
    self.screen_saver_mode = true
end

function SonyPRSTUX:outofScreenSaver()
    if self.screen_saver_mode == true then
        local Screensaver = require("ui/screensaver")
        Screensaver:close()
        local UIManager = require("ui/uimanager")
        UIManager:nextTick(function() UIManager:setDirty("all", "full") end)
    end
    self.powerd:afterResume()
    self.screen_saver_mode = false
end

function SonyPRSTUX:suspend()
    os.execute("./suspend.sh")
end

function SonyPRSTUX:resume()
    os.execute("./resume.sh")
end

function SonyPRSTUX:powerOff()
    os.execute("poweroff")
end

function SonyPRSTUX:reboot()
    os.execute("reboot")
end

function SonyPRSTUX:usbPlugIn()
    self.usb_plugged_in = true
    PluginShare.pause_auto_suspend = true
end

function SonyPRSTUX:usbPlugOut()
    self.usb_plugged_in = false
    PluginShare.pause_auto_suspend = false
end

function SonyPRSTUX:usbPluggedIn()
    return self.usb_plugged_in
end

function SonyPRSTUX:initNetworkManager(NetworkMgr)
    function NetworkMgr:turnOffWifi(complete_callback)
       self:releaseIP()
       os.execute("./set-wifi.sh off")
       if complete_callback then
           complete_callback()
       end
    end

    function NetworkMgr:turnOnWifi(complete_callback)
       os.execute("./set-wifi.sh on")
       self:showNetworkMenu(complete_callback)
    end

    function NetworkMgr:getNetworkInterfaceName()
        return "wlan0"
    end

    NetworkMgr:setWirelessBackend("wpa_supplicant", {ctrl_interface = "/var/run/wpa_supplicant/wlan0"})

    function NetworkMgr:obtainIP()
        self:releaseIP()
        os.execute("dhclient wlan0")
    end

    function NetworkMgr:releaseIP()
        logger.info("killing dhclient")
        os.execute("dhclient -x wlan0")
    end

    function NetworkMgr:restoreWifiAsync()
        -- os.execute("./restore-wifi-async.sh")
    end

    function NetworkMgr:isWifiOn()
        return 0 == os.execute("wmiconfig -i wlan0 --wlan query | grep -q enabled")
    end
end


function SonyPRSTUX:getSoftwareVersion()
    return ffi.string("PRSTUX")
end

function SonyPRSTUX:getDeviceModel()
    return ffi.string("PRS-T2")
end

-- For Sony PRS-T2
local SonyPRSTUX_T2 = SonyPRSTUX:new{
    isTouchDevice = yes,
    hasKeys = yes,
    hasFrontlight = no,
    display_dpi = 166,
}

logger.info('SoftwareVersion: ', SonyPRSTUX:getSoftwareVersion())

local codename = SonyPRSTUX:getDeviceModel()

if codename == "PRS-T2" then
    return SonyPRSTUX_T2
else
    error("unrecognized Sony PRSTUX model " .. codename)
end