from vision.ssd.vgg_ssd import create_vgg_ssd, create_vgg_ssd_predictor
from vision.ssd.mobilenetv1_ssd import create_mobilenetv1_ssd, create_mobilenetv1_ssd_predictor
from vision.ssd.mobilenetv1_ssd_lite import create_mobilenetv1_ssd_lite, create_mobilenetv1_ssd_lite_predictor
from vision.ssd.squeezenet_ssd_lite import create_squeezenet_ssd_lite, create_squeezenet_ssd_lite_predictor
from vision.ssd.mobilenet_v2_ssd_lite import create_mobilenetv2_ssd_lite, create_mobilenetv2_ssd_lite_predictor
from vision.utils.misc import Timer
import cv2
import sys
import torch

DEVICE = torch.device("cuda:0" if torch.cuda.is_available else "cpu")

if len(sys.argv) < 5:
    print('Usage: python run_ssd_example.py <net type>  <model path> <label path> <image path>')
    sys.exit(0)
net_type = sys.argv[1]
model_path = sys.argv[2]
label_path = sys.argv[3]
image_path = sys.argv[4]

class_names = [name.strip() for name in open(label_path).readlines()]

if net_type == 'vgg16-ssd':
    net = create_vgg_ssd(len(class_names), is_test=True)
elif net_type == 'mb1-ssd':
    net = create_mobilenetv1_ssd(len(class_names), is_test=True)
elif net_type == 'mb1-ssd-lite':
    net = create_mobilenetv1_ssd_lite(len(class_names), is_test=True)
elif net_type == 'mb2-ssd-lite':
    net = create_mobilenetv2_ssd_lite(len(class_names), is_test=True)
elif net_type == 'sq-ssd-lite':
    net = create_squeezenet_ssd_lite(len(class_names), is_test=True)
else:
    print("The net type is wrong. It should be one of vgg16-ssd, mb1-ssd and mb1-ssd-lite.")
    sys.exit(1)

combo_checkpoint = torch.load(model_path)
net_state_dict = combo_checkpoint['weights']
net.load_state_dict(net_state_dict)
net = net.to(DEVICE)

if net_type == 'vgg16-ssd':
    predictor = create_vgg_ssd_predictor(net, candidate_size=200)
elif net_type == 'mb1-ssd':
    predictor = create_mobilenetv1_ssd_predictor(net, candidate_size=200)
elif net_type == 'mb1-ssd-lite':
    predictor = create_mobilenetv1_ssd_lite_nredictor(net, candidate_size=200)
elif net_type == 'mb2-ssd-lite':
    predictor = create_mobilenetv2_ssd_lite_predictor(net, candidate_size=200)
elif net_type == 'sq-ssd-lite':
    predictor = create_squeezenet_ssd_lite_predictor(net, candidate_size=200)
else:
    predictor = create_vgg_ssd_predictor(net, candidate_size=200)

orig_image = cv2.imread(image_path)
image = cv2.cvtColor(orig_image, cv2.COLOR_BGR2RGB)
boxes, labels, probs = predictor.predict(image, 10, 0.4)


for i in range(boxes.size(0)):
    box = boxes[i, :]

    box = box.numpy()
    
    cv2.rectangle(orig_image, (int(box[0]), int(box[1])), (int(box[2]), int(box[3])), (255, 255, 0), 4)
    # OpenCV needs python int, not numpy int. Manual casting fixes https://github.com/opencv/opencv/issues/15465
    
    label = f"{class_names[labels[i]]}: {probs[i]:.2f}"
    cv2.putText(orig_image, label,
                (int(box[0]) + 20, int(box[1]) + 40),
                cv2.FONT_HERSHEY_SIMPLEX,
                1,  # font scale
                (255, 0, 255),
                2)  # line type
path = "run_ssd_example_output.jpg"
cv2.imwrite(path, orig_image)
print(f"Found {len(probs)} objects. The output image is {path}")
