#include <zephyr/kernel.h>
#include <string.h>
#include <stdio.h>
#include "utils/displayController.h"
#include "epaper/epaper.h"
#include "oled/oled.h"

static enum display_type_e {
    DISPLAY_NONE,
    DISPLAY_OLED,
    DISPLAY_EPD
} display_type = DISPLAY_NONE;

static int display_slot = 0;
static bool initialized = false;

void dc_init(const char *type_str, int slot) {
    if (initialized) return;

    display_slot = slot;

    if (strcmp(type_str, "EPD") == 0) {
        #if DT_NODE_EXISTS(DT_NODELABEL(epd))
            epd_init();
            epd_draw_something(' ');                
            display_type = DISPLAY_EPD;
            printk("EPD Display initialisiert (Slot %d)\n", slot);
        #else
            printk("Fehler: EPD ausgewählt, aber nicht im Devicetree vorhanden!\n");
        return;
        #endif
        
      
    } else if (strcmp(type_str, "OLED") == 0) {
        #if DT_NODE_EXISTS(DT_NODELABEL(oled))
        oled_init();
        oled_draw_something(' ');             
        display_type = DISPLAY_OLED;
        printk("OLED Display initialisiert (Slot %d)\n", slot);
        #endif
    } else {
        display_type = DISPLAY_NONE;
        printk("Unbekannter Displaytyp: %s (Slot %d)\n", type_str, slot);
    }

    initialized = true;
}

void dc_draw_something(const char *message) {
    char to_draw = message[display_slot];
    switch (display_type) {
        case DISPLAY_EPD:
            #if DT_NODE_EXISTS(DT_NODELABEL(epd))
            epd_init();
            epd_draw_something(to_draw);
            break;
            #endif
        case DISPLAY_OLED:
            #if DT_NODE_EXISTS(DT_NODELABEL(oled))
            oled_draw_something(to_draw);
            break;
            #endif
        default:
            printk("Kein gültiges Display initialisiert\n");
            break;
    }
}