#include "PowerFSM.h"
#include "GPS.h"
#include "MeshService.h"
#include "NodeDB.h"
#include "configuration.h"
#include "main.h"
#include "screen.h"
#include "sleep.h"
#include "target_specific.h"

static void sdsEnter()
{
    /*

  // Don't deepsleep if we have USB power or if the user as pressed a button recently
  // !isUSBPowered <- doesn't work yet because the axp192 isn't letting the battery fully charge when we are awake - FIXME
  if (millis() - lastPressMs > radioConfig.preferences.mesh_sds_timeout_secs)
  {
    doDeepSleep(radioConfig.preferences.sds_secs);
  }
*/

    doDeepSleep(radioConfig.preferences.sds_secs * 1000LL);
}

#include "error.h"

static uint32_t secsSlept;

static void lsEnter()
{
    DEBUG_MSG("lsEnter begin, ls_secs=%u\n", radioConfig.preferences.ls_secs);
    screen.setOn(false);
    secsSlept = 0; // How long have we been sleeping this time

    DEBUG_MSG("lsEnter end\n");
}

static void lsIdle()
{
    // DEBUG_MSG("lsIdle begin ls_secs=%u\n", radioConfig.preferences.ls_secs);

#ifndef NO_ESP32
    esp_sleep_source_t wakeCause = ESP_SLEEP_WAKEUP_UNDEFINED;

    // Do we have more sleeping to do?
    if (secsSlept < radioConfig.preferences.ls_secs) {
        // Briefly come out of sleep long enough to blink the led once every few seconds
        uint32_t sleepTime = 30;

        // If some other service would stall sleep, don't let sleep happen yet
        if (doPreflightSleep()) {
            setLed(false); // Never leave led on while in light sleep
            wakeCause = doLightSleep(sleepTime * 1000LL);

            if (wakeCause == ESP_SLEEP_WAKEUP_TIMER) {
                // Normal case: timer expired, we should just go back to sleep ASAP

                setLed(true);                // briefly turn on led
                wakeCause = doLightSleep(1); // leave led on for 1ms

                secsSlept += sleepTime;
                // DEBUG_MSG("sleeping, flash led!\n");
            }
            if (wakeCause == ESP_SLEEP_WAKEUP_UART) {
                // Not currently used (because uart triggers in hw have problems)
                powerFSM.trigger(EVENT_SERIAL_CONNECTED);
            } else {
                // We woke for some other reason (button press, uart, device interrupt)
                // uint64_t status = esp_sleep_get_ext1_wakeup_status();
                DEBUG_MSG("wakeCause %d\n", wakeCause);

#ifdef BUTTON_PIN
                bool pressed = !digitalRead(BUTTON_PIN);
#else
                bool pressed = false;
#endif
                if (pressed) // If we woke because of press, instead generate a PRESS event.
                {
                    powerFSM.trigger(EVENT_PRESS);
                } else {
                    // Otherwise let the NB state handle the IRQ (and that state will handle stuff like IRQs etc)
                    powerFSM.trigger(EVENT_WAKE_TIMER);
                }
            }
        } else {
            // Someone says we can't sleep now, so just save some power by sleeping the CPU for 100ms or so
            delay(100);
        }
    } else {
        // Time to stop sleeping!
        setLed(false);
        DEBUG_MSG("reached ls_secs, servicing loop()\n");
        powerFSM.trigger(EVENT_WAKE_TIMER);
    }
#endif
}

static void lsExit()
{
    // setGPSPower(true); // restore GPS power
    gps->startLock();
}

static void nbEnter()
{
    screen.setOn(false);
    setBluetoothEnable(false);

    // FIXME - check if we already have packets for phone and immediately trigger EVENT_PACKETS_FOR_PHONE
}

static void darkEnter()
{
    setBluetoothEnable(true);
    screen.setOn(false);
}

static void serialEnter()
{
    setBluetoothEnable(false);
    screen.setOn(true);
}

static void onEnter()
{
    screen.setOn(true);
    setBluetoothEnable(true);

    static uint32_t lastPingMs;

    uint32_t now = millis();

    if (now - lastPingMs > 30 * 1000) { // if more than a minute since our last press, ask other nodes to update their state
        if (displayedNodeNum)
            service.sendNetworkPing(displayedNodeNum, true); // Refresh the currently displayed node
        lastPingMs = now;
    }
}

static void wakeForPing() {}

static void screenPress()
{
    screen.onPress();
}

static void bootEnter() {}

State stateSDS(sdsEnter, NULL, NULL, "SDS");
State stateLS(lsEnter, lsIdle, lsExit, "LS");
State stateNB(nbEnter, NULL, NULL, "NB");
State stateDARK(darkEnter, NULL, NULL, "DARK");
State stateSERIAL(serialEnter, NULL, NULL, "SERIAL");
State stateBOOT(bootEnter, NULL, NULL, "BOOT");
State stateON(onEnter, NULL, NULL, "ON");
Fsm powerFSM(&stateBOOT);

void PowerFSM_setup()
{
    powerFSM.add_timed_transition(&stateBOOT, &stateON, 3 * 1000, NULL, "boot timeout");

    powerFSM.add_transition(&stateLS, &stateDARK, EVENT_WAKE_TIMER, wakeForPing, "Wake timer");

    // Note we don't really use this transition, because when we wake from light sleep we _always_ transition to NB and then it
    // handles things powerFSM.add_transition(&stateLS, &stateNB, EVENT_RECEIVED_PACKET, NULL, "Received packet");

    powerFSM.add_transition(&stateNB, &stateNB, EVENT_RECEIVED_PACKET, NULL, "Received packet, resetting win wake");

    // Handle press events - note: we ignore button presses when in API mode
    powerFSM.add_transition(&stateLS, &stateON, EVENT_PRESS, NULL, "Press");
    powerFSM.add_transition(&stateNB, &stateON, EVENT_PRESS, NULL, "Press");
    powerFSM.add_transition(&stateDARK, &stateON, EVENT_PRESS, NULL, "Press");
    powerFSM.add_transition(&stateON, &stateON, EVENT_PRESS, screenPress, "Press"); // reenter On to restart our timers

    // Handle critically low power battery by forcing deep sleep
    powerFSM.add_transition(&stateBOOT, &stateSDS, EVENT_LOW_BATTERY, NULL, "LowBat");
    powerFSM.add_transition(&stateLS, &stateSDS, EVENT_LOW_BATTERY, NULL, "LowBat");
    powerFSM.add_transition(&stateNB, &stateSDS, EVENT_LOW_BATTERY, NULL, "LowBat");
    powerFSM.add_transition(&stateDARK, &stateSDS, EVENT_LOW_BATTERY, NULL, "LowBat");
    powerFSM.add_transition(&stateON, &stateSDS, EVENT_LOW_BATTERY, NULL, "LowBat");
    powerFSM.add_transition(&stateSERIAL, &stateSDS, EVENT_LOW_BATTERY, NULL, "LowBat");

    powerFSM.add_transition(&stateDARK, &stateON, EVENT_BLUETOOTH_PAIR, NULL, "Bluetooth pairing");
    powerFSM.add_transition(&stateON, &stateON, EVENT_BLUETOOTH_PAIR, NULL, "Bluetooth pairing");

    powerFSM.add_transition(&stateNB, &stateON, EVENT_NODEDB_UPDATED, NULL, "NodeDB update");
    powerFSM.add_transition(&stateDARK, &stateON, EVENT_NODEDB_UPDATED, NULL, "NodeDB update");
    powerFSM.add_transition(&stateON, &stateON, EVENT_NODEDB_UPDATED, NULL, "NodeDB update");

    powerFSM.add_transition(&stateLS, &stateON, EVENT_RECEIVED_TEXT_MSG, NULL, "Received text");
    powerFSM.add_transition(&stateNB, &stateON, EVENT_RECEIVED_TEXT_MSG, NULL, "Received text");
    powerFSM.add_transition(&stateDARK, &stateON, EVENT_RECEIVED_TEXT_MSG, NULL, "Received text");
    powerFSM.add_transition(&stateON, &stateON, EVENT_RECEIVED_TEXT_MSG, NULL, "Received text"); // restarts the sleep timer

    powerFSM.add_transition(&stateLS, &stateSERIAL, EVENT_SERIAL_CONNECTED, NULL, "serial API");
    powerFSM.add_transition(&stateNB, &stateSERIAL, EVENT_SERIAL_CONNECTED, NULL, "serial API");
    powerFSM.add_transition(&stateDARK, &stateSERIAL, EVENT_SERIAL_CONNECTED, NULL, "serial API");
    powerFSM.add_transition(&stateON, &stateSERIAL, EVENT_SERIAL_CONNECTED, NULL, "serial API");

    powerFSM.add_transition(&stateSERIAL, &stateNB, EVENT_SERIAL_DISCONNECTED, NULL, "serial disconnect");

    powerFSM.add_transition(&stateDARK, &stateDARK, EVENT_CONTACT_FROM_PHONE, NULL, "Contact from phone");

    powerFSM.add_transition(&stateNB, &stateDARK, EVENT_PACKET_FOR_PHONE, NULL, "Packet for phone");

    powerFSM.add_timed_transition(&stateON, &stateDARK, radioConfig.preferences.screen_on_secs * 1000, NULL, "Screen-on timeout");

    powerFSM.add_timed_transition(&stateDARK, &stateNB, radioConfig.preferences.phone_timeout_secs * 1000, NULL, "Phone timeout");

#ifndef NRF52_SERIES
    // We never enter light-sleep state on NRF52 (because the CPU uses so little power normally)
    powerFSM.add_timed_transition(&stateNB, &stateLS, radioConfig.preferences.min_wake_secs * 1000, NULL, "Min wake timeout");

    powerFSM.add_timed_transition(&stateDARK, &stateLS, radioConfig.preferences.wait_bluetooth_secs * 1000, NULL,
                                  "Bluetooth timeout");
#endif

    powerFSM.add_timed_transition(&stateLS, &stateSDS, radioConfig.preferences.mesh_sds_timeout_secs * 1000, NULL,
                                  "mesh timeout");
    // removing for now, because some users don't even have phones
    // powerFSM.add_timed_transition(&stateLS, &stateSDS, radioConfig.preferences.phone_sds_timeout_sec * 1000, NULL, "phone
    // timeout");

    powerFSM.run_machine(); // run one interation of the state machine, so we run our on enter tasks for the initial DARK state
}