from pycocotools.coco import COCO
import numpy as np

T1_COCO_CLASS_NAMES = [
    "airplane", "bicycle", "bird", "boat", "bottle", "bus", "car", "cat",
    "chair", "cow", "dining table", "dog", "horse", "motorcycle", "person",
    "potted plant", "sheep", "couch", "train", "tv"
]

# Train
coco_annotation_file = '/home/datasets/mscoco/annotations/instances_train2017.json'
dest_file = '/home/OWOD/datasets/coco17_voc_style/ImageSets/t1_train_sel.txt'

coco_instance = COCO(coco_annotation_file)

image_ids = []
cls = []
for index, image_id in enumerate(coco_instance.imgToAnns):
    image_details = coco_instance.imgs[image_id]
    classes = [coco_instance.cats[annotation['category_id']]['name'] for annotation in coco_instance.imgToAnns[image_id]]
    if not set(classes).isdisjoint(T1_COCO_CLASS_NAMES):
        image_ids.append(image_details['file_name'].split('.')[0])
        cls.extend(classes)

(unique, counts) = np.unique(cls, return_counts=True)
print({x:y for x,y in zip(unique, counts)})

with open(dest_file, 'w') as file:
    for image_id in image_ids:
        file.write(str(image_id)+'\n')

print('Created train file')

# Test
coco_annotation_file = '/home/datasets/mscoco/annotations/instances_val2017.json'
dest_file = '/home/OWOD/datasets/coco17_voc_style/ImageSets/t1_test.txt'

coco_instance = COCO(coco_annotation_file)

image_ids = []
cls = []
for index, image_id in enumerate(coco_instance.imgToAnns):
    image_details = coco_instance.imgs[image_id]
    classes = [coco_instance.cats[annotation['category_id']]['name'] for annotation in coco_instance.imgToAnns[image_id]]
    if not set(classes).isdisjoint(T1_COCO_CLASS_NAMES):
        image_ids.append(image_details['file_name'].split('.')[0])
        cls.extend(classes)

(unique, counts) = np.unique(cls, return_counts=True)
print({x:y for x,y in zip(unique, counts)})

with open(dest_file, 'w') as file:
    for image_id in image_ids:
        file.write(str(image_id)+'\n')
print('Created test file')

dest_file = '/home/OWOD/datasets/coco17_voc_style/ImageSets/t1_test_unk.txt'
with open(dest_file, 'w') as file:
    for image_id in image_ids:
        file.write(str(image_id)+'\n')

print('Created test_unk file')