#!/usr/bin/env python3
"""
Reference validator for GlitchCraft
Checks that all file references in HTML and manifest actually exist
"""

import json
import os
import re
import sys
from pathlib import Path


def check_file_exists(file_path, base_dir):
    """Check if a file exists relative to base directory."""
    full_path = base_dir / file_path
    return full_path.exists()


def extract_html_references(html_content):
    """Extract file references from HTML content."""
    references = []
    
    # Link href attributes
    for match in re.finditer(r'<link[^>]+href=["\']([^"\']+)["\']', html_content):
        href = match.group(1)
        if not href.startswith(('http://', 'https://', '//', 'data:', '#')):
            references.append(href)
    
    # Script src attributes
    for match in re.finditer(r'<script[^>]+src=["\']([^"\']+)["\']', html_content):
        src = match.group(1)
        if not src.startswith(('http://', 'https://', '//', 'data:')):
            references.append(src)
    
    # Image src attributes
    for match in re.finditer(r'<img[^>]+src=["\']([^"\']+)["\']', html_content):
        src = match.group(1)
        if not src.startswith(('http://', 'https://', '//', 'data:')):
            references.append(src)
    
    return references


def extract_manifest_references(manifest_data):
    """Extract file references from manifest JSON."""
    references = []
    
    # Icon sources
    if 'icons' in manifest_data:
        for icon in manifest_data['icons']:
            if 'src' in icon:
                references.append(icon['src'])
    
    # Screenshot sources
    if 'screenshots' in manifest_data:
        for screenshot in manifest_data['screenshots']:
            if 'src' in screenshot:
                references.append(screenshot['src'])
    
    return references


def check_html_file(file_path, base_dir):
    """Check all references in an HTML file."""
    errors = []
    
    try:
        with open(file_path, 'r', encoding='utf-8') as f:
            content = f.read()
        
        references = extract_html_references(content)
        
        for ref in references:
            if not check_file_exists(ref, base_dir):
                errors.append(f"Missing file: {ref}")
                
    except Exception as e:
        errors.append(f"Error reading {file_path}: {e}")
    
    return errors


def check_manifest_file(file_path, base_dir):
    """Check all references in a manifest file."""
    errors = []
    
    try:
        with open(file_path, 'r', encoding='utf-8') as f:
            manifest_data = json.load(f)
        
        references = extract_manifest_references(manifest_data)
        
        for ref in references:
            if not check_file_exists(ref, base_dir):
                errors.append(f"Missing file: {ref}")
                
    except Exception as e:
        errors.append(f"Error reading {file_path}: {e}")
    
    return errors


def main():
    """Main function to check all references."""
    script_dir = Path(__file__).parent
    app_dir = script_dir / 'app'
    
    print("🔍 Checking file references...")
    
    total_errors = 0
    
    # Check HTML files
    html_files = list(app_dir.glob('*.html'))
    for html_file in html_files:
        errors = check_html_file(html_file, app_dir)
        if errors:
            print(f"\n❌ {html_file.name}:")
            for error in errors:
                print(f"  • {error}")
                total_errors += 1
        else:
            print(f"✅ {html_file.name}")
    
    # Check manifest file
    manifest_file = app_dir / 'manifest.json'
    if manifest_file.exists():
        errors = check_manifest_file(manifest_file, app_dir)
        if errors:
            print(f"\n❌ manifest.json:")
            for error in errors:
                print(f"  • {error}")
                total_errors += 1
        else:
            print("✅ manifest.json")
    
    # Summary
    if total_errors == 0:
        print(f"\n🎉 All file references are valid!")
        return 0
    else:
        print(f"\n💥 Found {total_errors} reference error(s)")
        return 1


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