#!/usr/bin/env python3
"""Quick test for weekly_update.py — verifies parsing, output format, and edge cases."""

import subprocess
import sys
import json
from pathlib import Path

SCRIPT = Path(__file__).resolve().parent.parent / "scripts" / "weekly_update.py"

def run(args: list[str]) -> str:
    result = subprocess.run(
        [sys.executable, str(SCRIPT)] + args,
        capture_output=True, text=True, cwd=str(SCRIPT.parent.parent)
    )
    return result.stdout, result.stderr, result.returncode

def test_basic_output():
    """Script runs without error and produces markdown."""
    stdout, stderr, rc = run(["--since", "2026-01-01"])
    assert rc == 0, f"Exit code {rc}: {stderr}"
    assert "## Week of" in stdout, f"Missing header: {stdout[:200]}"
    assert "### Completed" in stdout, f"Missing Completed section: {stdout[:200]}"
    assert "### Next Week" in stdout, f"Missing Next Week section: {stdout[-200:]}"
    print("PASS: basic_output")

def test_json_output():
    """Script outputs valid JSON in --json mode."""
    stdout, stderr, rc = run(["--json", "--since", "2026-01-01"])
    assert rc == 0, f"Exit code {rc}: {stderr}"
    data = json.loads(stdout)
    assert "commits" in data
    assert "since" in data
    print(f"PASS: json_output ({len(data['commits'])} commits)")

def test_no_crash_future_date():
    """Script handles future date gracefully."""
    stdout, stderr, rc = run(["--since", "2030-01-01"])
    assert rc == 0, f"Exit code {rc}: {stderr}"
    print("PASS: future_date_no_crash")

def test_empty_range():
    """Script handles a very old date with no commits."""
    stdout, stderr, rc = run(["--since", "2020-01-01", "--since", "2020-01-02"])
    assert rc == 0
    print("PASS: empty_range")

if __name__ == "__main__":
    test_basic_output()
    test_json_output()
    test_no_crash_future_date()
    print("\nAll tests passed.")