#!/usr/bin/env python3
"""
Pre-commit hook to check for incorrect research_id type hints.
Research IDs are UUIDs and should always be treated as strings, never as integers.
"""

import sys
import re
import os
from pathlib import Path

# Set environment variable for pre-commit hooks to allow unencrypted databases
os.environ["LDR_ALLOW_UNENCRYPTED"] = "true"


def check_file(filepath):
    """Check a single file for incorrect research_id patterns."""
    errors = []

    with open(filepath, "r", encoding="utf-8") as f:
        lines = f.readlines()

    # Patterns to check for
    patterns = [
        # Flask route with int type
        (
            r"<int:research_id>",
            "Flask route uses <int:research_id> - should be <string:research_id>",
        ),
        # Type hints with int
        (
            r"research_id:\s*int",
            "Type hint uses research_id: int - should be research_id: str",
        ),
        # Function parameters with int conversion
        (
            r"int\(research_id\)",
            "Converting research_id to int - research IDs are UUIDs/strings",
        ),
        # Integer comparison patterns
        (
            r"research_id\s*==\s*\d+",
            "Comparing research_id to integer - research IDs are UUIDs/strings",
        ),
    ]

    for line_num, line in enumerate(lines, 1):
        # Skip comment and docstring lines — comments like
        # "# Flask route: <int:research_id> (old API)" should not fire.
        if line.lstrip().startswith(("#", '"""', "'''")):
            continue
        for pattern, message in patterns:
            if re.search(pattern, line):
                errors.append(f"{filepath}:{line_num}: {message}")
                errors.append(f"  {line.strip()}")

    return errors


def main():
    """Main entry point."""
    # Get files to check from command line arguments
    files_to_check = sys.argv[1:]

    if not files_to_check:
        print("No files to check")
        return 0

    all_errors = []

    for filepath in files_to_check:
        # Skip non-Python files
        if not filepath.endswith(".py"):
            continue

        # Skip test files, migration files, and pre-commit hooks (they might have legitimate int usage).
        #
        # Previously this used `"test_" in filepath` (bare substring) — that
        # matched production files like protest_handler.py and missed the
        # *_test.py convention and files under a /tests/ directory. Mirror
        # the guard pattern from _is_raw_sql_exempt in custom-checks.py.
        p = Path(filepath)
        if (
            p.name.startswith("test_")
            or p.name.endswith("_test.py")
            or "tests" in p.parts
            or "migration" in filepath.lower()
            or ".pre-commit-hooks" in filepath
        ):
            continue

        errors = check_file(filepath)
        all_errors.extend(errors)

    if all_errors:
        print("Research ID type errors found:")
        print("-" * 80)
        for error in all_errors:
            print(error)
        print("-" * 80)
        print(
            f"Total errors: {len([e for e in all_errors if not e.startswith('  ')])}"
        )
        return 1

    return 0


if __name__ == "__main__":
    sys.exit(main())