import cv2

import time

from utils import iou

from scipy import spatial

from darkflow.net.build import TFNet

options = {'model': 'cfg/tiny-yolo-voc-3c.cfg',

           'load': 3750,

           'threshold': 0.1,

           'gpu': 0.7}

tfnet = TFNet(options)

pred_bb = []  # predicted bounding box

pred_cls = []  # predicted class

pred_conf = []  # predicted class confidence

def blood_cell_count(file_name):

    rbc = 0

    wbc = 0

    platelets = 0

    cell = []

    cls = []

    conf = []

    record = []

    tl_ = []

    br_ = []

    iou_ = []

    iou_value = 0

    tic = time.time()

    image = cv2.imread('data/' + file_name)

    output = tfnet.return_predict(image)

    for prediction in output:

        label = prediction['label']

        confidence = prediction['confidence']

        tl = (prediction['topleft']['x'], prediction['topleft']['y'])

        br = (prediction['bottomright']['x'], prediction['bottomright']['y'])

        if label == 'RBC' and confidence < .5:

            continue

        if label == 'WBC' and confidence < .25:

            continue

        if label == 'Platelets' and confidence < .25:

            continue

        # clearing up overlapped same platelets

        if label == 'Platelets':

            if record:

                tree = spatial.cKDTree(record)

                index = tree.query(tl)[1]

                iou_value = iou(tl + br, tl_[index] + br_[index])

                iou_.append(iou_value)

            if iou_value > 0.1:

                continue

            record.append(tl)

            tl_.append(tl)

            br_.append(br)

        center_x = int((tl[0] + br[0]) / 2)

        center_y = int((tl[1] + br[1]) / 2)

        center = (center_x, center_y)

        if label == 'RBC':

            color = (255, 0, 0)

            rbc = rbc + 1

        if label == 'WBC':

            color = (0, 255, 0)

            wbc = wbc + 1

        if label == 'Platelets':

            color = (0, 0, 255)

            platelets = platelets + 1

        radius = int((br[0] - tl[0]) / 2)

        image = cv2.circle(image, center, radius, color, 2)

        font = cv2.FONT_HERSHEY_COMPLEX

        image = cv2.putText(image, label, (center_x - 15, center_y + 5), font, .5, color, 1)

        cell.append([tl[0], tl[1], br[0], br[1]])

        if label == 'RBC':

            cls.append(0)

        if label == 'WBC':

            cls.append(1)

        if label == 'Platelets':

            cls.append(2)

        conf.append(confidence)

    toc = time.time()

    pred_bb.append(cell)

    pred_cls.append(cls)

    pred_conf.append(conf)

    avg_time = (toc - tic) * 1000

    print('{0:.5}'.format(avg_time), 'ms')

    cv2.imwrite('output/' + file_name, image)

    cv2.imshow('Total RBC: ' + str(rbc) + ', WBC: ' + str(wbc) + ', Platelets: ' + str(platelets), image)

    print('Press "ESC" to close . . .')

    if cv2.waitKey(0) & 0xff == 27:

        cv2.destroyAllWindows()

image_name = 'image_001.jpg'

blood_cell_count(image_name)

print('All Done!')