import cv2
import mediapipe as mp
import time


class FaceMeshDetector( ):

    def __init__(self, staticMode=False, maxFaces=2, refineLandmarks=False, minDetectionConf=0.5, minTrackConf=0.5):
        self.staticMode = staticMode
        self.maxFaces = maxFaces
        self.refineLandmarks = refineLandmarks
        self.minDetectionConf = minDetectionConf
        self.minTrackConf = minTrackConf

        self.mpDraw = mp.solutions.drawing_utils
        self.mpFaceMesh = mp.solutions.face_mesh
        self.faceMesh = self.mpFaceMesh.FaceMesh(self.staticMode, self.maxFaces, self.refineLandmarks,
                                                 self.minDetectionConf, self.minTrackConf)
        self.drawSpec = self.mpDraw.DrawingSpec(thickness=1, circle_radius=2)

    def findFaceMesh(self, img, draw=True):
        self.imgRGB = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
        self.results = self.faceMesh.process(self.imgRGB)
        faces = []
        if self.results.multi_face_landmarks:

            for faceLms in self.results.multi_face_landmarks:
                if draw:
                    self.mpDraw.draw_landmarks(img, faceLms, self.mpFaceMesh.FACEMESH_CONTOURS, self.drawSpec,
                                               self.drawSpec)
                face = []
                for id, lm in enumerate(faceLms.landmark):
                    # print(lm)
                    ih, iw, ic = img.shape
                    x, y = int(lm.x * iw), int(lm.y * ih)

                    # cv2.putText(img, str(id), (x,y), cv2.FONT_HERSHEY_PLAIN, 2, (0,255,0), 2)

                    # print(id,x,y)
                    face.append([x, y])
                faces.append(face)
        return img, faces


def main():
    cap = cv2.VideoCapture(0)
    pTime = 0
    detector = FaceMeshDetector(maxFaces=2)
    while True:
        success, img = cap.read( )
        img, faces = detector.findFaceMesh(img)
        if len(faces) != 0:
            print(faces[0])
        cTime = time.time( )
        fps = 1 / (cTime - pTime)
        pTime = cTime
        cv2.putText(img, f'FPS: {int(fps)}', (20, 70), cv2.FONT_HERSHEY_PLAIN, 5, (0, 255, 0), 5)
        cv2.imshow("Image", img)
        cv2.waitKey(1)


if __name__ == "__main__":
    main( )