#!/usr/bin/env python3
from __future__ import annotations
from decimal import ROUND_DOWN, Decimal
from pathlib import Path
import orjson

PRECISION = Decimal('.01')

ROOT = Path(__file__).resolve().parent.parent

def main() -> int:
  coverage_summary = ROOT / 'coverage-summary.json'

  coverage_data = orjson.loads(coverage_summary.read_text(encoding='utf-8'))
  total_data = coverage_data.pop('total')

  lines = ['\n', 'Package | Statements\n', '------- | ----------\n',]

  for package, data in sorted(coverage_data.items()):
    statements_covered = data['statements_covered']
    statements = data['statements']

    rate = Decimal(statements_covered) / Decimal(statements) * 100
    rate = rate.quantize(PRECISION, rounding=ROUND_DOWN)
    lines.append(f'{package} | {100 if rate == 100 else rate}% ({statements_covered} / {statements})\n')

  total_statements_covered = total_data['statements_covered']
  total_statements = total_data['statements']
  total_rate = Decimal(total_statements_covered) / Decimal(total_statements) * 100
  total_rate = total_rate.quantize(PRECISION, rounding=ROUND_DOWN)
  color = 'ok' if float(total_rate) >= 95 else 'critical'
  lines.insert(0, f'![Code Coverage](https://img.shields.io/badge/coverage-{total_rate}%25-{color}?style=flat)\n')

  lines.append(f'**Summary** | {100 if total_rate == 100 else total_rate}% ({total_statements_covered} / {total_statements})\n')

  coverage_report = ROOT / 'coverage-report.md'
  with coverage_report.open('w', encoding='utf-8') as f:
    f.write(''.join(lines))
  return 0

if __name__ == '__main__': raise SystemExit(main())