#!/usr/bin/env python3
"""
Create Module Script
Generer et nyt BMC Hub modul fra template
"""

import os
import sys
import json
import shutil
from pathlib import Path


def create_module(module_name: str, description: str = ""):
    """
    Opret nyt modul baseret på _template
    
    Args:
        module_name: Navn på nyt modul (fx "my_module")
        description: Beskrivelse af modul
    """
    
    # Validate module name
    if not module_name.replace("_", "").isalnum():
        print(f"❌ Ugyldigt modul navn: {module_name}")
        print("   Brug kun bogstaver, tal og underscore")
        sys.exit(1)
        
    # Paths
    project_root = Path(__file__).parent.parent
    modules_dir = project_root / "app" / "modules"
    template_dir = modules_dir / "_template"
    new_module_dir = modules_dir / module_name
    
    # Check if template exists
    if not template_dir.exists():
        print(f"❌ Template directory ikke fundet: {template_dir}")
        sys.exit(1)
        
    # Check if module already exists
    if new_module_dir.exists():
        print(f"❌ Modul '{module_name}' eksisterer allerede")
        sys.exit(1)
        
    print(f"📦 Opretter modul: {module_name}")
    print(f"   Placering: {new_module_dir}")
    
    # Copy template
    try:
        shutil.copytree(template_dir, new_module_dir)
        print(f"✅ Kopieret template struktur")
    except Exception as e:
        print(f"❌ Kunne ikke kopiere template: {e}")
        sys.exit(1)
        
    # Update module.json
    manifest_path = new_module_dir / "module.json"
    try:
        with open(manifest_path, 'r', encoding='utf-8') as f:
            manifest = json.load(f)
            
        manifest["name"] = module_name
        manifest["description"] = description or f"BMC Hub module: {module_name}"
        manifest["table_prefix"] = f"{module_name}_"
        manifest["api_prefix"] = f"/api/v1/{module_name}"
        manifest["tags"] = [module_name.replace("_", " ").title()]
        
        with open(manifest_path, 'w', encoding='utf-8') as f:
            json.dump(manifest, f, indent=2, ensure_ascii=False)
            
        print(f"✅ Opdateret module.json")
    except Exception as e:
        print(f"❌ Kunne ikke opdatere module.json: {e}")
        sys.exit(1)
        
    # Update README.md
    readme_path = new_module_dir / "README.md"
    try:
        with open(readme_path, 'r', encoding='utf-8') as f:
            readme = f.read()
            
        # Replace template references
        readme = readme.replace("Template Module", f"{module_name.replace('_', ' ').title()} Module")
        readme = readme.replace("template_module", module_name)
        readme = readme.replace("my_module", module_name)
        readme = readme.replace("mymod_", f"{module_name}_")
        readme = readme.replace("template_", f"{module_name}_")
        
        with open(readme_path, 'w', encoding='utf-8') as f:
            f.write(readme)
            
        print(f"✅ Opdateret README.md")
    except Exception as e:
        print(f"⚠️ Kunne ikke opdatere README: {e}")
        
    # Update backend/router.py
    router_path = new_module_dir / "backend" / "router.py"
    try:
        with open(router_path, 'r', encoding='utf-8') as f:
            router_code = f.read()
            
        router_code = router_code.replace("Template Module", f"{module_name.replace('_', ' ').title()} Module")
        router_code = router_code.replace("template_module", module_name)
        router_code = router_code.replace("template_items", f"{module_name}_items")
        router_code = router_code.replace("/template/", f"/{module_name}/")
        
        with open(router_path, 'w', encoding='utf-8') as f:
            f.write(router_code)
            
        print(f"✅ Opdateret backend/router.py")
    except Exception as e:
        print(f"⚠️ Kunne ikke opdatere router: {e}")
        
    # Update frontend/views.py
    views_path = new_module_dir / "frontend" / "views.py"
    try:
        with open(views_path, 'r', encoding='utf-8') as f:
            views_code = f.read()
            
        views_code = views_code.replace("Template Module", f"{module_name.replace('_', ' ').title()} Module")
        views_code = views_code.replace("template_module", module_name)
        views_code = views_code.replace("template_items", f"{module_name}_items")
        views_code = views_code.replace("/template", f"/{module_name}")
        views_code = views_code.replace("_template", module_name)
        
        with open(views_path, 'w', encoding='utf-8') as f:
            f.write(views_code)
            
        print(f"✅ Opdateret frontend/views.py")
    except Exception as e:
        print(f"⚠️ Kunne ikke opdatere views: {e}")
        
    # Update migration SQL
    migration_path = new_module_dir / "migrations" / "001_init.sql"
    try:
        with open(migration_path, 'r', encoding='utf-8') as f:
            migration_sql = f.read()
            
        migration_sql = migration_sql.replace("Template Module", f"{module_name.replace('_', ' ').title()} Module")
        migration_sql = migration_sql.replace("template_items", f"{module_name}_items")
        migration_sql = migration_sql.replace("template_module", module_name)
        
        with open(migration_path, 'w', encoding='utf-8') as f:
            f.write(migration_sql)
            
        print(f"✅ Opdateret migrations/001_init.sql")
    except Exception as e:
        print(f"⚠️ Kunne ikke opdatere migration: {e}")
        
    print()
    print("🎉 Modul oprettet successfully!")
    print()
    print("Næste steps:")
    print(f"1. Kør database migration:")
    print(f"   psql -U bmc_hub -d bmc_hub -f app/modules/{module_name}/migrations/001_init.sql")
    print()
    print(f"2. Enable modulet:")
    print(f"   Rediger app/modules/{module_name}/module.json og sæt 'enabled': true")
    print()
    print(f"3. Restart API:")
    print(f"   docker-compose restart api")
    print()
    print(f"4. Test endpoints:")
    print(f"   http://localhost:8000/api/docs#{module_name.replace('_', '-').title()}")
    print(f"   http://localhost:8000/{module_name}")
    print()
    print(f"5. Tilføj modul-specifik konfiguration til .env:")
    print(f"   MODULES__{module_name.upper()}__READ_ONLY=false")
    print(f"   MODULES__{module_name.upper()}__DRY_RUN=false")
    print()


def main():
    """Main entry point"""
    if len(sys.argv) < 2:
        print("Usage: python scripts/create_module.py <module_name> [description]")
        print()
        print("Eksempel:")
        print('  python scripts/create_module.py my_feature "My awesome feature"')
        sys.exit(1)
        
    module_name = sys.argv[1]
    description = sys.argv[2] if len(sys.argv) > 2 else ""
    
    create_module(module_name, description)


if __name__ == "__main__":
    main()