#!/usr/bin/env python3

import argparse
import json
from typing import Tuple


def parse_resolution(resolution: str) -> Tuple[int, int]:
    a, b = resolution.split('x')
    return int(a), int(b)

def scale_x_y(x, y, from_resolution, to_resolution):
    return (x * to_resolution[0] / from_resolution[0], y * to_resolution[1] / from_resolution[1])

def scale_region(region, from_resolution, to_resolution):
    x, y = scale_x_y(region['x'], region['y'], from_resolution, to_resolution)
    width, height = scale_x_y(region['width'], region['height'], from_resolution, to_resolution)
    region['x'] = round(x)
    region['y'] = round(y)
    region['width'] = round(width)
    region['height'] = round(height)
    if '_time' in region['name'] and to_resolution[1] < 1440:
        region['threshold'] = 0.88

def main():
    argparser = argparse.ArgumentParser()
    argparser.add_argument("--from_res", help="From resolution", default="2560x1440")
    argparser.add_argument("--to_res", help="To resolution (e.g. 1920x1080)")
    argparser.add_argument("--config", help="Config file", default="config.json")

    args = argparser.parse_args()

    from_resolution = parse_resolution(args.from_res)
    to_resolution = parse_resolution(args.to_res)
    config = json.load(open(args.config, 'r'))
    for region in config['ocr_regions']:
        scale_region(region, from_resolution, to_resolution)
    scale_region(config['track_region'], from_resolution, to_resolution)
    scale_region(config['penalty_orange_region'], from_resolution, to_resolution)
    print(json.dumps(config, indent=4)) 


   
if __name__ == '__main__':
    main()