#! /usr/bin/env python3

import json

import sys

def apply(data) -> None:

# Sort modifications by reverse start line number to apply them in that order.

data["modifications"].sort(key=lambda m: m["start-line-number"], reverse=True)

for modification in data["modifications"]:

with open(modification["filename"], "r") as f:

lines = [line.rstrip() for line in f.readlines()]

pre_lines = lines[: modification["start-line-number"] - 1]

replacement_lines = modification["replacement"].splitlines()

post_lines = lines[

modification["start-line-number"]

+ modification["number-lines-remove"]

- 1 :

]

# If replacing a single line, make sure we keep indentation.

if (

modification["number-lines-remove"] == 1

and len(replacement_lines) == 1

and modification["start-line-number"] >= 1

):

replaced_line = lines[modification["start-line-number"] - 1]

replacement_lines[0] = replacement_lines[0].lstrip()

n = len(replaced_line) - len(replaced_line.lstrip())

whitespace = replaced_line[:n]

replacement_lines[0] = whitespace + replacement_lines[0]

lines = pre_lines + replacement_lines + post_lines

with open(modification["filename"], "w") as f:

f.write("\n".join(lines))

if __name__ == "__main__":

apply(json.load(sys.stdin))