from ili934xnew import ILI9341, color565
from machine import Pin, SPI, ADC
from micropython import const
import time
import tt24

SCR_WIDTH  = const(320)
SCR_HEIGHT = const(240)
SCR_ROT    = const(1)

TFT_CLK_PIN  = const(18)
TFT_MOSI_PIN = const(19)
TFT_CS_PIN   = const(17)
TFT_RST_PIN  = const(21)  # your wiring: GP21
TFT_DC_PIN   = const(20)  # your wiring: GP20

# No MISO passed — Wokwi ILI9341 doesn't use it
spi = SPI(
    0,
    baudrate=10000000,
    mosi=Pin(TFT_MOSI_PIN),
    sck=Pin(TFT_CLK_PIN)
)

display = ILI9341(
    spi,
    cs=Pin(TFT_CS_PIN),
    dc=Pin(TFT_DC_PIN),
    rst=Pin(TFT_RST_PIN),
    w=SCR_WIDTH,
    h=SCR_HEIGHT,
    r=SCR_ROT
)

display.set_font(tt24)
display.erase()

# Potentiometer on GP27 per your wiring
adc = ADC(Pin(27))

x_start  = 30
x_end    = 260
x_pos    = x_start
y_base   = 200
time_sec = 0

def draw_line(x0, y0, x1, y1, color):
    dx =  abs(x1 - x0)
    dy = -abs(y1 - y0)
    sx = 1 if x0 < x1 else -1
    sy = 1 if y0 < y1 else -1
    err = dx + dy
    while True:
        display.pixel(x0, y0, color)
        if x0 == x1 and y0 == y1:
            break
        e2 = 2 * err
        if e2 >= dy:
            err += dy
            x0  += sx
        if e2 <= dx:
            err += dx
            y0  += sy

def draw_filled_circle(x0, y0, r, color):
    for y in range(-r, r + 1):
        for x in range(-r, r + 1):
            if x * x + y * y <= r * r:
                display.pixel(x0 + x, y0 + y, color)

def draw_axes():
    draw_line(x_start, 40, x_start, y_base, color565(255, 255, 255))
    draw_line(x_start, y_base, x_end, y_base, color565(255, 255, 255))
    for t in range(20, 45, 5):
        y = y_base - (t - 20) * 5
        display.set_pos(5, y - 10)   # (col, row) — matches PDF
        display.print(str(t))

draw_axes()

while True:
    adc_value    = adc.read_u16()
    voltage_mv   = (adc_value / 65535.0) * 3300
    temperature_c = voltage_mv / 10.0

    display.set_color(color565(255, 255, 255), color565(0, 0, 0))
    display.fill_rectangle(180, 10, 130, 70, color565(0, 0, 0))

    display.set_pos(140, 10)
    display.print("Napon: {:.0f}mV".format(voltage_mv))
    display.set_pos(140, 35)
    display.print("Temp: {:.1f}C".format(temperature_c))
    display.set_pos(180, 60)
    display.print("Vrijeme: {}s".format(time_sec))

    y_temp = int(y_base - (temperature_c - 20) * 5)
    if 20 <= temperature_c <= 40:
        draw_filled_circle(x_pos, y_temp, 2, color565(255, 0, 0))

    x_pos    += 5
    time_sec += 1

    if x_pos > x_end:
        display.erase()
        draw_axes()
        x_pos    = x_start
        time_sec = 0

    time.sleep(1)