import cv2
import time
import numpy as np
import handtracingModule as htm
import math
from ctypes import cast, POINTER
from comtypes import CLSCTX_ALL
from pycaw.pycaw import AudioUtilities, IAudioEndpointVolume

################################
wCam, hCam = 640, 480
################################

#configure camera
cap=cv2.VideoCapture(0,cv2.CAP_DSHOW)
cap.set(cv2.CAP_PROP_FRAME_WIDTH,wCam)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT,hCam)
cap.set(cv2.CAP_PROP_FPS,30)
cap.set(cv2.CAP_PROP_FOURCC,cv2.VideoWriter_fourcc(*'MJPG'))#setting codec

pTime = 0

detector = htm.handDetector(detectionCon=0.7)

devices = AudioUtilities.GetSpeakers()
interface = devices.Activate(
    IAudioEndpointVolume._iid_, CLSCTX_ALL, None)
volume = cast(interface, POINTER(IAudioEndpointVolume))
# volume.GetMute()
# volume.GetMasterVolumeLevel()
volRange = volume.GetVolumeRange()
minVol = volRange[0]
maxVol = volRange[1]
vol = 0
volBar = 400
volPer = 0
while True:
    success, img = cap.read()
    img = detector.findHands(img)
    lmList = detector.findPosition(img, draw=False)
    if len(lmList) != 0:
        # print(lmList[4], lmList[8])

        x1, y1 = lmList[4][1], lmList[4][2]
        x2, y2 = lmList[8][1], lmList[8][2]
        cx, cy = (x1 + x2) // 2, (y1 + y2) // 2

        cv2.circle(img, (x1, y1), 10, (255, 0, 255), cv2.FILLED)
        cv2.circle(img, (x2, y2), 10, (255, 0, 255), cv2.FILLED)
        cv2.line(img, (x1, y1), (x2, y2), (255, 0, 255), 3)
        cv2.circle(img, (cx, cy), 10, (255, 0, 255), cv2.FILLED)

        length = math.hypot(x2 - x1, y2 - y1)
        print(length)

        # Hand range 50 - 300   //17 - 194
        # Volume Range -65 - 0  // 63.5
        
        #VOLUME BAR
        vol = np.interp(length, [17, 194], [minVol, maxVol])
        volBar = np.interp(length, [17, 194], [400, 150])
        volPer = np.interp(length, [17, 194], [0, 100])
        print(int(length), vol)
        volume.SetMasterVolumeLevel(vol, None)

        #if circle meets 
        if length < 50:
            cv2.circle(img, (cx, cy), 10, (0, 0, 255), cv2.FILLED)

    cv2.rectangle(img, (50, 150), (85, 400), (0, 0, 255), 3)
    cv2.rectangle(img, (50, int(volBar)), (85, 400), (0, 0, 255), cv2.FILLED)
    cv2.putText(img, f'{int(volPer)} %', (40, 450), cv2.FONT_HERSHEY_COMPLEX,
                1, (0, 255, 0), 3)

    #fps
    cTime = time.time()
    fps = 1 / (cTime - pTime)
    pTime = cTime
    cv2.putText(img, f'FPS: {int(fps)}', (40, 50), cv2.FONT_HERSHEY_COMPLEX,
                1, (255, 0, 0), 3)

    cv2.imshow("Img", img)
    if cv2.waitKey(1) & 0xff ==ord('q'):
        break
cap.release()
cv2.destroyAllWindows()

# from https://github.com/AndreMiras/pycaw
# from comtypes import CLSCTX_ALL
# from pycaw.pycaw import AudioUtilities, IAudioEndpointVolume
# devices = AudioUtilities.GetSpeakers()
# interface = devices.Activate(
#     IAudioEndpointVolume._iid_, CLSCTX_ALL, None)
# volume = interface.QueryInterface(IAudioEndpointVolume)
# volume.GetMute()
# volume.GetMasterVolumeLevel()
# volume.GetVolumeRange()
# volume.SetMasterVolumeLevel(-20.0, None)