"""
Path Fix & Diagnostic Script
Fixes backslash paths in database and checks file existence
"""

import sys
import os

script_dir = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, script_dir)

def find_database():
    """Find the database file in common locations."""
    possible_paths = [
        os.path.join(script_dir, 'instance', 'lego_instructions.db'),
        os.path.join(script_dir, 'lego_instructions.db'),
        os.path.join(script_dir, 'app', 'lego_instructions.db'),
    ]
    
    for path in possible_paths:
        if os.path.exists(path):
            return path
    
    return None

def main():
    # Find database
    db_path = find_database()
    
    if not db_path:
        print("=" * 70)
        print("❌ Database not found!")
        print("=" * 70)
        print()
        print("Searched in:")
        print("  - E:\\LIM\\instance\\lego_instructions.db")
        print("  - E:\\LIM\\lego_instructions.db")
        print("  - E:\\LIM\\app\\lego_instructions.db")
        print()
        return
    
    print(f"Found database: {db_path}")
    print()
    
    # Set database URL
    db_uri = 'sqlite:///' + db_path.replace('\\', '/')
    os.environ['DATABASE_URL'] = db_uri
    
    from app import create_app, db
    from app.models.instruction import Instruction
    from app.models.set import Set
    from flask import current_app
    
    app = create_app()
    
    with app.app_context():
        print("=" * 70)
        print("LEGO Instructions Manager - Path Fix & Diagnostics")
        print("=" * 70)
        print()
        
        upload_folder = current_app.config['UPLOAD_FOLDER']
        print(f"Upload folder: {upload_folder}")
        print()
        
        # Check instructions
        instructions = Instruction.query.all()
        print(f"Found {len(instructions)} instruction files")
        print()
        
        fixed_paths = 0
        fixed_thumbnails = 0
        missing_files = []
        
        for instruction in instructions:
            # Fix file_path backslashes
            if '\\' in instruction.file_path:
                old_path = instruction.file_path
                instruction.file_path = instruction.file_path.replace('\\', '/')
                fixed_paths += 1
                print(f"Fixed path: {old_path} → {instruction.file_path}")
            
            # Fix thumbnail_path backslashes
            if instruction.thumbnail_path and '\\' in instruction.thumbnail_path:
                old_thumb = instruction.thumbnail_path
                instruction.thumbnail_path = instruction.thumbnail_path.replace('\\', '/')
                fixed_thumbnails += 1
                print(f"Fixed thumbnail: {old_thumb} → {instruction.thumbnail_path}")
            
            # Check if file exists
            full_path = os.path.join(upload_folder, instruction.file_path)
            if not os.path.exists(full_path):
                missing_files.append({
                    'id': instruction.id,
                    'file_name': instruction.file_name,
                    'path': instruction.file_path,
                    'full_path': full_path,
                    'set_id': instruction.set_id
                })
        
        # Fix cover images
        sets = Set.query.all()
        fixed_covers = 0
        
        for lego_set in sets:
            if lego_set.cover_image and '\\' in lego_set.cover_image:
                old_cover = lego_set.cover_image
                lego_set.cover_image = lego_set.cover_image.replace('\\', '/')
                fixed_covers += 1
                print(f"Fixed cover: {old_cover} → {lego_set.cover_image}")
        
        # Commit changes
        if fixed_paths or fixed_thumbnails or fixed_covers:
            db.session.commit()
            print()
            print("=" * 70)
            print("✅ Database Updates:")
            print("=" * 70)
            print(f"  • Fixed {fixed_paths} instruction file paths")
            print(f"  • Fixed {fixed_thumbnails} thumbnail paths")
            print(f"  • Fixed {fixed_covers} cover image paths")
            print()
        else:
            print()
            print("✅ No path fixes needed - all paths are correct!")
            print()
        
        # Report missing files
        if missing_files:
            print("=" * 70)
            print("⚠️  WARNING: Missing Files Detected")
            print("=" * 70)
            print()
            for item in missing_files:
                lego_set = Set.query.get(item['set_id'])
                print(f"Missing: {item['file_name']}")
                print(f"  Set: {lego_set.set_number if lego_set else 'Unknown'}")
                print(f"  DB Path: {item['path']}")
                print(f"  Full Path: {item['full_path']}")
                print(f"  Instruction ID: {item['id']}")
                print()
            
            print(f"Total missing: {len(missing_files)} files")
            print()
            print("These files may have been:")
            print("  • Deleted manually from disk")
            print("  • Never uploaded properly")
            print("  • Moved to wrong location")
            print()
            print("To fix:")
            print("  1. Re-upload the files, or")
            print("  2. Delete the database records:")
            print(f"     DELETE FROM instructions WHERE id IN ({','.join(str(x['id']) for x in missing_files)});")
            print()
        else:
            print("=" * 70)
            print("✅ All Files Verified")
            print("=" * 70)
            print("  All instruction files exist on disk!")
            print()
        
        # Summary
        print("=" * 70)
        print("Summary")
        print("=" * 70)
        print(f"  Total instructions: {len(instructions)}")
        print(f"  Paths fixed: {fixed_paths + fixed_thumbnails + fixed_covers}")
        print(f"  Files verified: {len(instructions) - len(missing_files)}")
        print(f"  Missing files: {len(missing_files)}")
        print()
        
        if fixed_paths or fixed_thumbnails or fixed_covers:
            print("✅ Restart Flask to see changes!")
        
        print()

if __name__ == "__main__":
    main()