import sys
import os
import json
import argparse
from typing import Mapping

sys.path.append(os.path.abspath(sys.path[0] + '/../'))

from utils import view

parser = argparse.ArgumentParser()
parser.add_argument('-o', '--output', type=str, default='')
parser.add_argument('dataset', type=str)
args = parser.parse_args()


data_desc_path = os.path.abspath(args.dataset)
data_desc_name = os.path.splitext(os.path.basename(data_desc_path))[0]
data_dir = os.path.dirname(data_desc_path) + '/'

with open(data_desc_path, 'r') as fp:
    dataset_desc: Mapping = json.load(fp)

dataset_desc['cam_params'] = view.CameraParam.convert_camera_params(
    dataset_desc['cam_params'],
    (dataset_desc['view_res']['y'], dataset_desc['view_res']['x']))

dataset_desc['view_rots'] = [
    view.euler_to_matrix([rot[1], rot[0], 0])
    for rot in dataset_desc['view_rots']
] if len(dataset_desc['view_rots'][0]) == 2 else dataset_desc['view_rots']

if dataset_desc.get('gl_coord'):
    del dataset_desc['gl_coord']
    for i in range(len(dataset_desc['view_centers'])):
        dataset_desc['view_centers'][i][2] *= -1
        dataset_desc['view_rots'][i][2] *= -1
        dataset_desc['view_rots'][i][5] *= -1
        dataset_desc['view_rots'][i][6] *= -1
        dataset_desc['view_rots'][i][7] *= -1

output_name = args.output if args.output else data_desc_name + '_cvt.json'
with open(os.path.join(data_dir, output_name), 'w') as fp:
    json.dump(dataset_desc, fp, indent=4)