"""Debug the optional returns regex - try multiple approaches."""
import subprocess
import os
from pathlib import Path

REPO = Path(r"C:\projects\manual_slop_tier2")

env = os.environ.copy()
env["GIT_PAGER"] = "cat"

# Approach A: use -e flag to separate pattern
cmd = ["git", "grep", "-nE", "-e", r"-> Optional\[", "--", "src/*.py"]
r = subprocess.run(cmd, cwd=str(REPO), capture_output=True, text=True, encoding="utf-8", env=env)
print(f"Approach A (-e flag): rc={r.returncode}")
print(f"  stdout: {r.stdout[:300]!r}")
print(f"  stderr: {r.stderr[:300]!r}")

# Approach B: write pattern to file
import tempfile
with tempfile.NamedTemporaryFile(mode="w", suffix=".txt", delete=False, encoding="utf-8") as f:
    f.write(r"-> Optional\[")
    pattern_file = f.name
cmd = ["git", "grep", "-nE", "-f", pattern_file, "--", "src/*.py"]
r = subprocess.run(cmd, cwd=str(REPO), capture_output=True, text=True, encoding="utf-8", env=env)
print(f"\nApproach B (-f file): rc={r.returncode}")
print(f"  stdout: {r.stdout[:300]!r}")

# Approach C: use plain grep via PowerShell
import subprocess as sp
ps_cmd = 'git grep -nE "-> Optional\\[" -- src/*.py 2>&1'
r = sp.run(["powershell", "-Command", ps_cmd], cwd=str(REPO), capture_output=True, text=True, encoding="utf-8")
print(f"\nApproach C (powershell): rc={r.returncode}")
print(f"  stdout: {r.stdout[:300]!r}")

# Approach D: use shell=True with the proper escaping
r = subprocess.run('git grep -nE "-> Optional\\[" -- src/*.py', cwd=str(REPO), shell=True, capture_output=True, text=True, encoding="utf-8", env=env)
print(f"\nApproach D (shell=True): rc={r.returncode}")
print(f"  stdout: {r.stdout[:300]!r}")