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#yw348 Yannan Wu
#zh62 Zhengning Han

#import libraries
import pygame
from pygame.locals import *
import RPi.GPIO as GPIO
import time
import numpy as np
import os
import threading
import sys

############INITIALIZE##############################
os.putenv('SDL_VIDEODRIVER', 'fbcon')
os.putenv('SDL_FBDEV', '/dev/fb1')
os.putenv('SDL_MOUSEDRV', 'TSLIB')
os.putenv('SDL_MOUSEDEV', '/dev/input/touchscreen')
pygame.init()
pygame.mouse.set_visible(False)

GPIO.setmode(GPIO.BCM)
GPIO.setup(17, GPIO.IN, pull_up_down = GPIO.PUD_UP)
GPIO.setup(20, GPIO.IN, pull_up_down = GPIO.PUD_UP)
GPIO.setup(22, GPIO.IN, pull_up_down = GPIO.PUD_UP)
GPIO.setup(23, GPIO.IN, pull_up_down = GPIO.PUD_UP)
GPIO.setup(27, GPIO.IN, pull_up_down = GPIO.PUD_UP)

GPIO.setup(6, GPIO.OUT)  #holder
GPIO.setup(13, GPIO.OUT) #holder
wheel = GPIO.PWM(6, 46.5)  
wheel_blue = GPIO.PWM(13, 46.5)
wheel.start(0)  
wheel_blue.start(0)

GPIO.setup(12, GPIO.OUT) 
GPIO.setup(19, GPIO.OUT)
GPIO.setup(26, GPIO.OUT)
GPIO.setup(5, GPIO.OUT)
GPIO.setup(16, GPIO.OUT)
GPIO.setup(21, GPIO.OUT)

salt = GPIO.PWM(21, 50)
salt.start(5)
sugar = GPIO.PWM(16,50)
sugar.start(5)
msg = GPIO.PWM(12, 50)
msg.start(5)
garlic = GPIO.PWM(5, 50)
garlic.start(5)
ginger = GPIO.PWM(26, 50)
ginger.start(5)
chili = GPIO.PWM(19, 50)
chili.start(5)

black=0,0,0
white=255, 255, 255
blue=0,0,255
red=255,0,0
green = 0, 255, 0
pink = 255,105,180
crimson = 220,20,60
brown = 180,64,16
yellow = 255,255,0
size = width,height=320,240
screen = pygame.display.set_mode(size)
new_start = 1

values = {'salt':0, 'sugar':0, 'msg':0, 'garlic':0, 'ginger':0, 'chili':0}


def GPIO27_callback(channel):
    #emergency quit button
    GPIO.cleanup()
    quit()

############HELPER FUNCTIONS################
def render_background():
    #load the image as background
    screen.fill(black)
    bg = pygame.image.load("background.JPG")
    bgrect = bg.get_rect()
    screen.blit(bg,bgrect)    #combine bg surface with workspace surface

def render_quit():
    #load the quit touch button
    quit_font = pygame.font.Font(None, 50)
    quit_surface = quit_font.render('quit', True, white)
    quit_rect = quit_surface.get_rect(center = (160, 180))
    screen.blit(quit_surface, quit_rect)

def render_cancel():
    #load the cacel touch button
    return_font = pygame.font.Font(None, 50)
    return_surface = return_font.render('X', True, blue)
    return_rect = return_surface.get_rect(center = (310, 110))
    screen.blit(return_surface, return_rect)

def render_ok():
    #load the ok touch button
    return_font = pygame.font.Font(None, 50)
    return_surface = return_font.render('Ok', True, green)
    return_rect = return_surface.get_rect(center = (298, 45))
    screen.blit(return_surface, return_rect)
    
def render_menu(): 
    #laod the entire manu page  
    ingredients = {'salt':(40,30), 'sugar':(40,105), 'msg':(40,180), 'garlic':(200,30), 'ginger':(200,105), 'chili':(200,180)}
    my_font = pygame.font.Font(None, 40)
    value_font = pygame.font.Font(None, 30)
    render_background()
    render_ok()
    render_cancel()
    global values
    i=0

    # render ingredients names and values
    for my_text, text_pos in ingredients.items():
        # add ingredient names
        text_surface = my_font.render(my_text, True, black)
        rect = text_surface.get_rect(center = text_pos)
        screen.blit(text_surface, rect)

        # add ingredient value
        value_surface = value_font.render(str(values[my_text]), True, black)
        value_rect = value_surface.get_rect(center = (text_pos[0], text_pos[1]+30))
        screen.blit(value_surface, value_rect)

        i=i+1

    pygame.display.flip()


def render_amount(name):
    #using the global info the load the correspoding amount value for each ingredient
    render_background()
    name_font = pygame.font.Font(None, 120)
    text_surface = name_font.render(name, True, black)
    rect = text_surface.get_rect(center = (120,80))
    screen.blit(text_surface, rect)
    
    arrow_font = pygame.font.Font(None, 150)

    # add up buttons
    up_surface = arrow_font.render('+', True, red)
    up_rect = up_surface.get_rect(center = (290,100))
    screen.blit(up_surface, up_rect)

    # add down buttons
    down_surface = arrow_font.render('-', True, blue)
    down_rect = down_surface.get_rect(center = (290,220))
    screen.blit(down_surface, down_rect)

    # add ingredient values
    value_surface = name_font.render(str(values[name]), True, black)
    value_rect = value_surface.get_rect(center = (120,170))
    screen.blit(value_surface, value_rect)

    render_ok()
    
    pygame.display.flip()
    

def render_ingredient(name):
    render_amount(name)
    while True:
        if GPIO.event_detected(17):
            return
        elif GPIO.event_detected(22):
            values[name] = values[name]+1
            render_amount(name)
        elif GPIO.event_detected(27):
            if(values[name] > 0 ):
                values[name] = values[name]-1
                render_amount(name)
                
def render_dispensing():
    #load the dispensing page
    render_background()
    font = pygame.font.Font(None, 60)
    surface = font.render('DISPENSING...', True, yellow)
    rect = surface.get_rect(center = (160, 120))
    screen.blit(surface, rect)
    pygame.display.flip()
    time.sleep(3)
    
            
           
def next_bottle():
    #move the bottom plate to next bottle
    wheel.start(5)  
    wheel_blue.start(5)
    time.sleep(0.48)
    wheel.start(0)  
    wheel_blue.start(0)
        


def new_round():
    #move the bottom plate back to the initial position 
    wheel.ChangeDutyCycle(10)  
    wheel_blue.ChangeDutyCycle(10)
    time.sleep(2.7)  
    wheel_blue.start(0)
    wheel.start(0)

        
def start_h():
    #manu page 
    salt.start(0)
    sugar.start(0)
    msg.start(0)
    ginger.start(0)
    garlic.start(0)
    chili.start(0)
    render_menu()
    while True:
        # dispense according to input amount
        if GPIO.event_detected(17):
            render_dispensing()
            for i in range(0, values['salt']):                       
                salt.ChangeDutyCycle(10)
                time.sleep(0.1)
                salt.ChangeDutyCycle(5)
                time.sleep(1)
                salt.ChangeDutyCycle(0)
            time.sleep(1)
            next_bottle()
            time.sleep(1)
            for i in range(0, values['sugar']):                       
                sugar.ChangeDutyCycle(10)
                time.sleep(0.1)
                sugar.ChangeDutyCycle(5)
                time.sleep(1)
                sugar.ChangeDutyCycle(0)
            time.sleep(1)
            next_bottle()
            time.sleep(1)
            for i in range(0, values['msg']):                       
                msg.ChangeDutyCycle(10)
                time.sleep(0.1)
                msg.ChangeDutyCycle(5)
                time.sleep(1)
                msg.ChangeDutyCycle(0)
            time.sleep(1)
            next_bottle()
            time.sleep(1)
            for i in range(0, values['garlic']):                       
                garlic.ChangeDutyCycle(10)
                time.sleep(0.1)
                garlic.ChangeDutyCycle(5)
                time.sleep(1)
                garlic.ChangeDutyCycle(0)
            time.sleep(1)
            next_bottle()
            time.sleep(1)
            for i in range(0, values['ginger']):                       
                ginger.ChangeDutyCycle(10)
                time.sleep(0.1)
                ginger.ChangeDutyCycle(5)
                time.sleep(1)
                ginger.ChangeDutyCycle(0)
            time.sleep(1)
            next_bottle()
            time.sleep(1)
            for i in range(0, values['chili']):                       
                chili.ChangeDutyCycle(10)
                time.sleep(0.1)
                chili.ChangeDutyCycle(5)
                time.sleep(1)
                chili.ChangeDutyCycle(0)
            time.sleep(1)
            new_round()
            return
                           
        elif GPIO.event_detected(22):
            return
        for event in pygame.event.get():
            if (event.type is MOUSEBUTTONDOWN):
                pos = pygame.mouse.get_pos()
            elif (event.type is MOUSEBUTTONUP):
                pos = pygame.mouse.get_pos()
                x,y = pos
                #touch button detections for each ingredient
                if x>=0 and x<=70 and y>=0 and y<=65:
                    render_background()
                    render_ingredient('salt')
                    render_menu()
                elif x>=0 and x<=70 and y>=70 and y<=135:
                    render_background()
                    render_ingredient('sugar')
                    render_menu()
                elif x>=0 and x<=70 and y>=150 and y<=210:
                    render_background()
                    render_ingredient('msg')
                    render_menu()
                elif x>=160 and x<=230 and y>=0 and y<=65:
                    render_background()
                    render_ingredient('garlic')
                    render_menu()
                elif x>=160 and x<=230 and y>=70 and y<=135:
                    render_background()
                    render_ingredient('ginger')
                    render_menu()
                elif x>=160 and x<=230 and y>=150 and y<=210:
                    render_background()
                    render_ingredient('chili')
                    render_menu()                    
    
############HOME PAGE################################                   

def main():
    GPIO.add_event_detect(27, GPIO.FALLING, bouncetime=300)
    GPIO.add_event_detect(17, GPIO.FALLING, bouncetime=300)
    GPIO.add_event_detect(22, GPIO.FALLING, bouncetime=300)
    GPIO.add_event_detect(23, GPIO.FALLING, callback=GPIO27_callback, bouncetime=300)
    try:
        global new_start
        global values
        render_background()
        render_quit()
        start_font = pygame.font.Font(None, 100)
        start_surface = start_font.render('start', True, black)
        start_rect = start_surface.get_rect(center = (160, 80))
        screen.blit(start_surface, start_rect)
        pygame.display.flip()   #display workspace on screen
        while(True):
            if(new_start):
                for event in pygame.event.get():
                    if (event.type is MOUSEBUTTONDOWN):
                        pos = pygame.mouse.get_pos()
                    elif (event.type is MOUSEBUTTONUP):
                        pos = pygame.mouse.get_pos()
                        x,y = pos
                        if x>= 120 and x<= 200 and y>=80 and y<=160:
                            new_start = 0
                            start_h() #enter the manu page
                            render_background() #prepare for a new start
                            render_quit()
                            start_font = pygame.font.Font(None, 100)
                            start_surface = start_font.render('start', True, black)
                            start_rect = start_surface.get_rect(center = (160, 80))
                            screen.blit(start_surface, start_rect)
                            pygame.display.flip()   #display workspace on screen                            
                            new_start = 1
                            values = {'salt':0, 'sugar':0, 'msg':0, 'garlic':0, 'ginger':0, 'chili':0}
                        elif x>= 120 and x<= 200 and y>=140 and y<=220:
                            GPIO.cleanup()
                            return
        
    except Exception as e:
        GPIO.cleanup()
        print(e)


if __name__=="__main__":
    main()