import gradio as gr
#from app.document_handling import create_database, modify_database, delete_database, list_databases
from app.functions.database_handling import create_database, modify_database, delete_database, list_databases

def create_db_management_tab(update_all_dropdowns=None):
    """Crea il tab 'Gestione Database' dell'interfaccia Gradio."""
    
    # Ottieni la lista iniziale dei database
    databases = list_databases()

    with gr.Tab("Gestione Database"):
        gr.Markdown("## Operazioni sui Database")
        
        with gr.Row():
            with gr.Column():
                gr.Markdown("### Crea Database")
                db_name_input = gr.Textbox(label="Nome Nuovo Database")
                create_db_button = gr.Button("Crea Database")
                create_output = gr.Textbox(label="Stato Creazione")
            
            with gr.Column():
                gr.Markdown("### Rinomina Database")
                modify_db_old_name = gr.Dropdown(
                    choices=databases, 
                    label="Database da Rinominare"
                )
                modify_db_new_name = gr.Textbox(label="Nuovo Nome")
                modify_db_button = gr.Button("Rinomina Database")
                modify_output = gr.Textbox(label="Stato Modifica")
            
            with gr.Column():
                gr.Markdown("### Elimina Database") 
                delete_db_dropdown = gr.Dropdown(
                    choices=databases, 
                    label="Database da Eliminare"
                )
                delete_db_button = gr.Button("Elimina Database")
                delete_output = gr.Textbox(label="Stato Eliminazione")
        
        # Eventi per i bottoni di gestione DB
        create_db_button.click(
            fn=create_database,
            inputs=db_name_input,
            outputs=create_output
        ).then(
            fn=update_all_dropdowns,       # <--- callback globale
            inputs=[],
            outputs=[modify_db_old_name, delete_db_dropdown]
        )

        modify_db_button.click(
            fn=modify_database,
            inputs=[modify_db_old_name, modify_db_new_name],
            outputs=modify_output
        ).then(
            fn=update_all_dropdowns,       # <--- callback globale
            inputs=[],
            outputs=[modify_db_old_name, delete_db_dropdown]
        )

        delete_db_button.click(
            fn=delete_database,
            inputs=delete_db_dropdown,
            outputs=delete_output
        ).then(
            fn=update_all_dropdowns,       # <--- callback globale
            inputs=[],
            outputs=[modify_db_old_name, delete_db_dropdown]
        )
    
    # Ritorna i componenti che vogliamo poter aggiornare/agganciare
    return [modify_db_old_name, delete_db_dropdown, create_db_button, modify_db_button, delete_db_button]