/**
 * TODO file description
 */

#include <stdbool.h>
#include <string.h>
#include "app_gui.h"
#include "lcd/lcdbuf.h"
#include "lcd.h"
#include "app_config.h"
#include "app_io.h"

struct State s_app = {};

struct LcdBuffer lcd = {};

/** Schedule paint (the screen func will be called with the PAINT event argument */
void request_paint()
{
    s_app.paint_needed = true;
}

/** Draw the common overlay / HUD (with temperatures and heater status) */
static void draw_common_overlay();

//stratch string buffer
char sbuf[100];

void gui_read_moisture() {
    s_app.moisture_pt = moisture_convert(s_app.moisture_raw = moisture_read());
}

static void read_time_and_moisture() {
    rtc_get_time(&s_app.rtc_time); // now is a good time to update timestamp - we could just increment it though
    gui_read_moisture();
}

/** Main loop */
void gui_init()
{
    switch_screen(screen_home, true);

    read_time_and_moisture();

    LcdBuffer_Init(&lcd, CGROM_A00, CGRAM_CZ);
}

void gui_loop_iter(GuiEvent message)
{
    uint32_t tickNow = timestamp_ms();

    // Time program logic - since this runs very often, we are guaranteed not to miss a cycle - unless there is a power outage
    // exactly in the scheduled watering time

    if (s_app.screen != screen_cyklus && app_config.scheduler_enable) {
        if (s_app.cycle_time_checking) {
            if (s_app.rtc_time.hour != s_app.last_cycle_time.hour
                || s_app.rtc_time.minute != s_app.last_cycle_time.minute) {
                s_app.cycle_time_checking = false;
            }
        } else {
            for (int i = 0; i < SCHEDULE_COUNT; i++) {
                if (!app_config.schedules[i].enable) {
                    continue;
                }

                if (s_app.rtc_time.hour == app_config.schedules[i].h
                    && s_app.rtc_time.minute == app_config.schedules[i].m) {
                    // cycle can preempt all screens

                    // Check if moisture is OK
                    if (app_config.moisture_enable) {
                        if (s_app.moisture_pt > app_config.moisture_threshold_percent) {
                            // watering not needed
                            break;
                        }
                    }

                    switch_screen(screen_cyklus, true);
                    break;
                }
            }
        }
    }

    // screen auto-close
    if (s_app.screen != screen_home && s_app.screen != screen_cyklus) {
        if ((tickNow - s_app.screen_open_time) >= (MENU_AUTOEXIT_TIME_S * 1000)) {
            switch_screen(screen_home, true);
        }
    }

    // Read RTC every second
    if (tickNow - s_app.last_1s_time >= 1000) {
        s_app.screen(GUI_EVENT_SCREEN_TICK_1S);
        read_time_and_moisture();
        s_app.last_1s_time = tickNow;
    }

    // 100ms tick event
    if (tickNow - s_app.last_100ms_time >= 100) {
        s_app.screen(GUI_EVENT_SCREEN_TICK_100MS);
        s_app.last_100ms_time = tickNow;
    }

    // 10ms tick event
    if (tickNow - s_app.last_10ms_time >= 10) {
        s_app.screen(GUI_EVENT_SCREEN_TICK_10MS);
        s_app.last_10ms_time = tickNow;
    }

    if (message != GUI_EVENT_NONE) {
        s_app.screen(message);
    }

    if (message >= 32) { // lazy shortcut so we dont have to list all of them
        // key was pressed
        input_sound_effect();
    }

    if (s_app.paint_needed) {
        s_app.paint_needed = false;

        draw_common_overlay();
        s_app.screen(GUI_EVENT_PAINT);

        // If there is anything to print, do it
        LcdBuffer_Flush(&lcd);
    }
}

/** Switch to a different screen handler.
 * If "init" is true, immediately call it with the init event. */
void switch_screen(screen_t pScreen, bool init)
{
    if (s_app.screen == pScreen) {
        // already, no op
        return;
    }

    s_app.screen_open_time = timestamp_ms();
    s_app.screen = pScreen;

    LcdBuffer_Clear(&lcd);
    LcdBuffer_SetCursor(&lcd, 0, 0, CURSOR_NONE); // always start with a hidden cursor. If the page wants a visible cursor, it should do that in PAINT
    request_paint();

    // Reset the timers, so the screen has nicely aligned events
    s_app.last_10ms_time = s_app.last_100ms_time = s_app.last_1s_time = timestamp_ms();
    // also read time so we have the latest greatest
    rtc_get_time(&s_app.rtc_time);

    if (init) {
        pScreen(GUI_EVENT_SCREEN_INIT);
    }
}

/** Draw GUI common to all screens */
static void draw_common_overlay()
{
    // TODO
}

/** Play input sound effect if this is an input event */
void input_sound_effect()
{
    // TODO
}