#include <stdio.h>
#include <string.h>
#include "app_gui.h"
#include "gui_event.h"
#include "app_io.h"
#include "lcd.h"
#include "app_config.h"

static struct ScheduleTime time;
static int cursor;

int pgm_edit_slot; // set from the program overview screen

void screen_program_edit(GuiEvent event)
{
    switch (event) {
        case GUI_EVENT_SCREEN_INIT:
            memcpy(&time, &settings_scratch.schedules[pgm_edit_slot], sizeof(time));
            cursor = 0;
            break;

        case GUI_EVENT_PAINT:
            snprintf(sbuf, sbuf_len, "Denní slot %d", 1 + pgm_edit_slot);
            LcdBuffer_Write(&lcd, 0, 0, sbuf);

            if (time.enable) {
                LcdBuffer_SetCursor(&lcd, 1, cursor + (cursor >= 2), (cursor < 4) ? CURSOR_BOTH : CURSOR_NONE);
                snprintf(sbuf, sbuf_len, "%02d:%02d", time.h, time.m);
                LcdBuffer_Write(&lcd, 1, 0, sbuf);
            } else {
                LcdBuffer_SetCursor(&lcd, 0, 0, CURSOR_NONE);
                LcdBuffer_Write(&lcd, 1, 0, "--:-- (slot vypnutý)");
            }

            if (!time.enable) {
                LcdBuffer_Write(&lcd, 3, 0, "🅱Zapnout 🅳Zruš 🅰OK");
            } else {
                LcdBuffer_Write(&lcd, 3, 0, (cursor < 4) ? "🅱Vypnout 🅳Zruš" : "🅱Vypnout 🅳Zruš 🅰OK");
            }
            break;

        case GUI_EVENT_KEY_A: // Confirm
            if (!time.enable || cursor == 4) {
                memcpy(&settings_scratch.schedules[pgm_edit_slot], &time, sizeof(time));
                switch_screen(screen_program_prehled, false);
            }
            break;

        case GUI_EVENT_KEY_B: // Zap/Vyp
            time.enable = !time.enable;
            cursor = 0;
            LcdBuffer_Clear(&lcd);
            request_paint();
            break;

        case GUI_EVENT_KEY_D: // CANCEL
            switch_screen(screen_program_prehled, false);
            break;

        default:
            if (event >= '0' && event <= '9') {
                if (cursor == 0) {
                    // it showed the current time, but now we are entering something, so it must be reset!
                    time.h = 0;
                    time.m = 0;
                }

                int digit = event - '0';
                if (cursor == 0) {
                    if (digit <= 2) {
                        time.h += digit * 10;
                        cursor++;
                        request_paint();
                    }
                } else if (cursor == 1) {
                    if (time.h < 20 || digit <= 3) {
                        time.h += digit;
                        cursor++;
                        request_paint();
                    }
                } else if (cursor == 2) {
                    if (digit <= 5) {
                        time.m += digit * 10;
                        cursor++;
                        request_paint();
                    }
                } else if (cursor == 3) {
                    time.m += digit;
                    cursor++; // cursor disappears
                    request_paint();
                }
            }
    }
}