import sys
import spotipy
import spotipy.util as util
import config as cfg
from PIL import Image, ImageDraw, ImageFont
import asyncio
from rgbmatrix import RGBMatrix, RGBMatrixOptions
import threading
import requests
from io import BytesIO
import time

client_id = cfg.client_id
client_secret = cfg.client_secret
redirect_uri = cfg.redirect_uri
username = cfg.username

scope = 'user-read-currently-playing'

options = RGBMatrixOptions()
options.rows = 32
options.cols = 64
options.chain_length = 6
options.parallel = 2
options.hardware_mapping = 'regular'
options.pixel_mapper_config = 'U-mapper'
options.limit_refresh_rate_hz = 240
options.gpio_slowdown = 4
options.brightness = 50
options.disable_hardware_pulsing = True
screen = RGBMatrix(options = options)

song_name=""
artist_name=""

cache_path="/home/pi/.cache-"+username

is_playing = False

token = None #oauth2.SpotifyOAuth(username, scope, client_id, client_secret, redirect_uri)

#token = util.prompt_for_user_token(username, scope, client_id, client_secret, redirect_uri)

font = ImageFont.load_default()

def get_track():
    print('getting current song info')
    sp = spotipy.Spotify(auth=token)
    track = sp.currently_playing()
    global is_playing
    is_playing = track['is_playing']
    global song_name
    song_name = track['item']['name']
    global artist_name
    artist_name = track['item']['artists'][0]['name']
    for i in range(len(track['item']['artists'])-1):
        artist_name +=', ' + track['item']['artists'][i+1]['name']
    print('got info: ' + track['item']['name'] + ' - ' + track['item']['artists'][0]['name'])
    #print('getting image')
    image_url = track['item']['album']['images'][0]['url']
    response = requests.get(image_url)
    image = Image.open(BytesIO(response.content))
    #print(image_url)
    image = image.resize((32,32))
    return image

def showImage(image, offset_x = 0, offset_y = 0):
    image = image.convert('RGB')
    width, height = image.size
    for x in range(width):
        for y in range(height):
            r, g, b = image.getpixel((x, y))
            screen.SetPixel(x+offset_x,y+offset_y,r,g,b)



#if token:
#    sp = spotipy.Spotify(auth=token)
#    track = sp.currently_playing()
#    print(track['is_playing'])
#    print(track['item']['name'] + ' - ' + track['item']['artists'][0]['name'])
#    imageString = requests.get(track['item']['album']['images'][0]['url'])
#    image = Image.open(BytesIO(imageString.content))
#    image = image.resize((32,32))
#    #image.save("thumbnail.jpg","JPEG")
#else:
#    print("Can't get token for", username)
#def main():
#    x = threading.Thread(target=draw)
#    x.start()


def drawCanvas():
    canvas = Image.new('RGB', (192, 128), color = 'black')
    cover_art = get_track()
    if (cover_art is None):
        return
    if(is_playing):
        canvas.paste(cover_art,(0,96))
        songinfo = ImageDraw.Draw(canvas)
        songinfo_offset_x = 33
        songinfo_offset_y = 101
        songinfo.text((songinfo_offset_x,songinfo_offset_y+11), song_name)
        songinfo.text((songinfo_offset_x,songinfo_offset_y), artist_name)
        
        #scrolling_text(song_name,songinfo_offset_x, songinfo_offset_y+10)
        if(font.getsize(song_name)[0]>160):
            x = threading.Thread(target=scrolling_text,args=(song_name,songinfo_offset_x,songinfo_offset_y+11))
            x.start()
            print('scrolling text started')
        if(font.getsize(artist_name)[0]>160):
            
            y = threading.Thread(target=scrolling_text,args=(artist_name,songinfo_offset_x,songinfo_offset_y))
            y.start()
            
    showImage(canvas)


def scrolling_text(text,offset_x=0,offset_y=0):
    scroll_frame_time = (8/2)/(font.getsize(text)[0]-160)
    #print(scroll_frame_time)
    if(scroll_frame_time>0.03):
        scroll_frame_time = 0.03
    for i in range((font.getsize(text)[0]-160)):
        scrolled_text_canvas = Image.new('RGB', (160, 11), color = 'black')
        scrolled_text = ImageDraw.Draw(scrolled_text_canvas)
        scrolled_text.text((-i,0), text)
        showImage(scrolled_text_canvas, offset_x, offset_y)
        time.sleep(scroll_frame_time)
        #print('scrolled '+str(i)+' px')
    if((5-(font.getsize(text)[0]-160)*2*scroll_frame_time)>0):
        time.sleep(5-(font.getsize(text)[0]-160)*2*scroll_frame_time)
    for i in range(font.getsize(text)[0]-160):
        scrolled_text_canvas = Image.new('RGB', (160, 11), color = 'black')
        scrolled_text = ImageDraw.Draw(scrolled_text_canvas)
        scrolled_text.text(((-(font.getsize(text)[0]-160))+i+1,0), text)
        showImage(scrolled_text_canvas, offset_x, offset_y)
        time.sleep(scroll_frame_time)
        #print('scrolled '+str(i)+' px')
    
        
def main():
    get_access_token()
    
def get_access_token():
    global token
    sp_oauth = spotipy.SpotifyOAuth(
        client_id,
        client_secret,
        redirect_uri,
        scope=scope,
        #cache_path=cache_path,
        username=username,
        open_browser=False
    )
    token_info = sp_oauth.get_cached_token()

    if not token_info:
        code = sp_oauth.get_auth_response()
        token = sp_oauth.get_access_token(code, as_dict=False)
    else:
        token =  token_info["access_token"]
    
def is_token_expired():
    sp_oauth = spotipy.SpotifyOAuth(
        client_id,
        client_secret,
        redirect_uri,
        scope=scope,
        #cache_path=cache_path,
        username=username,
        open_browser=False
    )
    token_info = sp_oauth.get_cached_token()
    if not token_info:
        return True
    else:
        return sp_oauth.is_token_expired(token_info)
    
 
if __name__ == "__main__":
    main()
    print('led-matrix-viewer started')
    
    while True:
        if(is_token_expired()):
            get_access_token()
        drawCanvas()
        time.sleep(10)