from PIL import Image,ImageDraw

def create_color_image(width, height, color=(255,255,255)):
    img = Image.new('RGB', (width, height), color)
    return img

def fill_points(image,points,color=(255,255,255)):
    draw = ImageDraw.Draw(image)
    int_points = [(int(x), int(y)) for x, y in points]
    draw.polygon(int_points, fill=color)
    return image


def minus_point(pt1,pt2):
    return [pt1[0]-pt2[0],pt1[1]-pt2[1]]

def lerp_point(pt1,pt2,pt2_ratio):
    return [int(pt1[0]*(1.0-pt2_ratio)+pt2[0]*pt2_ratio),pt1[1]*(1.0-pt2_ratio)+pt2[1]*pt2_ratio]

def mean_point(points):
    xs = 0
    ys = 0
    for pt in points:
        xs +=pt[0]
        ys +=pt[1]
    return [int(xs/len(points)),int(ys/len(points))]

def get_face_points(face_landmarks_list):
    contour_points=get_landmark_points(face_landmarks_list,PARTS_CONTOUR)
    left_eyebrow_points=get_landmark_points(face_landmarks_list,PARTS_LEFT_EYEBROW)

    right_eyebrow_points=get_landmark_points(face_landmarks_list,PARTS_RIGHT_EYEBROW)

    nose_points=get_landmark_points(face_landmarks_list,PARTS_NOSE_BRIDGE)
    
    diff_right = minus_point(contour_points[1],contour_points[0])
    right_minus_corner = minus_point(contour_points[0] , diff_right)
    right_contour = lerp_point(right_minus_corner,left_eyebrow_points[0],0.3)

    diff_left = minus_point(contour_points[15],contour_points[16])
    left_minus_corner = minus_point(contour_points[16] , diff_left)
    left_contour = lerp_point(left_minus_corner,right_eyebrow_points[-1],0.3)

    middle_face = mean_point([nose_points[0],right_eyebrow_points[0],left_eyebrow_points[-1]])
    return [right_contour]+list(contour_points)+[left_contour,middle_face]


def get_innner_mouth_points(face_landmarks_list):
    top_points=get_landmark_points(face_landmarks_list,PARTS_UPPER_LIP)
    bottom_points=get_landmark_points(face_landmarks_list,PARTS_LOWER_LIP)
    return top_points[7:]+bottom_points[7:]#[::-1]


PARTS_UPPER_LIP = "top_lip"
PARTS_LOWER_LIP = "bottom_lip"
PARTS_CONTOUR ="chin"
PARTS_LEFT_EYEBROW ="left_eyebrow"
PARTS_RIGHT_EYEBROW ="right_eyebrow"
PARTS_LEFT_EYE ="left_eye"
PARTS_RIGHT_EYE ="right_eye"
PARTS_NOSE_TIP ="nose_tip"
PARTS_NOSE_BRIDGE ="nose_bridge"

def get_landmark_points(face_landmarks_list,key):
    matching_landmark_points = []
    for face_landmarks in face_landmarks_list:
      for landmark_name, landmark_points in face_landmarks.items():
        matching_landmark_points = landmark_points.copy()
        if landmark_name ==key:
            return tuple(matching_landmark_points)