#!/usr/bin/env python3
"""
Auto-fix script for InsightFlow code issues
"""

import re
from pathlib import Path


def fix_file(filepath):
    """Fix common issues in a Python file"""
    with open(filepath, 'r', encoding='utf-8') as f:
        content = f.read()

    original = content
    changes = []

    # 1. Fix implicit Optional (RUF013)
    # Pattern: def func(arg: type = None) -> def func(arg: type | None = None)
    # Note: implicit_optional_pattern and fix_optional function defined for future use

    # More careful approach for implicit Optional
    lines = content.split('\n')
    new_lines = []
    for line in lines:
        original_line = line
        # Fix patterns like "metadata: dict = None,"
        if re.search(r':\s*\w+\s*=\s*None', line) and '| None' not in line:
            # Match parameter definitions
            match = re.search(r'(\w+)\s*:\s*(\w+(?:\[[^\]]+\])?)\s*=\s*None', line)
            if match:
                param_name = match.group(1)
                param_type = match.group(2)
                if param_type != 'NoneType':
                    line = line.replace(f'{param_name}: {param_type} = None',
                                        f'{param_name}: {param_type} | None = None')
                    if line != original_line:
                        changes.append(f"Fixed implicit Optional: {param_name}")
        new_lines.append(line)
    content = '\n'.join(new_lines)

    # 2. Fix unnecessary assignment before return (RET504)
    # Note: return_patterns defined for future use
    pass  # Placeholder for future implementation

    # 3. Fix RUF010 - Use explicit conversion flag
    # f"...{str(var)}..." -> f"...{var!s}..."
    content = re.sub(r'\{str\(([^)]+)\)\}', r'{\1!s}', content)
    content = re.sub(r'\{repr\(([^)]+)\)\}', r'{\1!r}', content)

    # 4. Fix RET505 - Unnecessary else after return
    # This is complex, skip for now

    # 5. Fix PERF401 - List comprehensions (basic cases)
    # This is complex, skip for now

    # 6. Fix RUF012 - Mutable default values
    # Pattern: def func(arg: list = []) -> def func(arg: list = None) with handling
    content = re.sub(r'(\w+)\s*:\s*list\s*=\s*\[\]', r'\1: list | None = None', content)
    content = re.sub(r'(\w+)\s*:\s*dict\s*=\s*\{\}', r'\1: dict | None = None', content)

    # 7. Fix unused imports (basic)
    # Remove duplicate imports
    import_lines = re.findall(r'^(import\s+\w+|from\s+\w+\s+import\s+[^\n]+)$', content, re.MULTILINE)
    seen_imports = set()
    for imp in import_lines:
        if imp in seen_imports:
            content = content.replace(imp + '\n', '\n', 1)
            changes.append(f"Removed duplicate import: {imp}")
        seen_imports.add(imp)

    if content != original:
        with open(filepath, 'w', encoding='utf-8') as f:
            f.write(content)
        return True, changes
    return False, []


def main():
    backend_dir = Path('/root/.openclaw/workspace/projects/insightflow/backend')
    py_files = list(backend_dir.glob('*.py'))

    fixed_files = []
    all_changes = []

    for filepath in py_files:
        fixed, changes = fix_file(filepath)
        if fixed:
            fixed_files.append(filepath.name)
            all_changes.extend([f"{filepath.name}: {c}" for c in changes])

    print(f"Fixed {len(fixed_files)} files:")
    for f in fixed_files:
        print(f"  - {f}")
    if all_changes:
        print("\nChanges made:")
        for c in all_changes[:20]:
            print(f"  {c}")


if __name__ == '__main__':
    main()