from dash.dependencies import Input, Output, State, ALL
from dash import html, callback_context
from utils.file_utils import list_files_in_directory, save_file, delete_file, ensure_directory_exists
from components.hotwords import generate_training_data_table, HotwordsLayout, ManageHotwordLayout
import os
import dash_bootstrap_components as dbc

TRAINING_HOTWORD_DIR = './training/hotword/'

def register_hotwords_callbacks(app):

    @app.callback(
        Output("new-hotword-input", "children"),
        Input("add-new-hotword", "n_clicks"),
        prevent_initial_call=True
    )
    def display_new_hotword_input(n_clicks):
        if n_clicks:
            return dbc.Input(id="new-hotword-name", placeholder="Enter new hotword name", type="text")

    @app.callback(
        Output("page-manage-content-nav", "children"),
        [
            Input("new-hotword-name", "n_submit"),
            Input({'type': 'delete-hotword', 'index': ALL}, 'n_clicks')
        ],
        [
            State("new-hotword-name", "value"),
            State({'type': 'delete-hotword', 'index': ALL}, 'id')
        ],
        prevent_initial_call=True
    )
    def manage_hotwords(n_submit, n_clicks_delete, hotword_name, delete_id):
        ctx = callback_context

        if not ctx.triggered:
            return html.Div()

        triggered_id = ctx.triggered[0]['prop_id'].split('.')[0]

        if 'new-hotword-name' in triggered_id and hotword_name:
            new_hotword_path = os.path.join(TRAINING_HOTWORD_DIR, hotword_name)
            ensure_directory_exists(new_hotword_path)
            return HotwordsLayout()

        if 'delete-hotword' in triggered_id:
            model_name = delete_id[0]['index']
            hotword_path = os.path.join(TRAINING_HOTWORD_DIR, model_name)
            if os.path.exists(hotword_path):
                os.rmdir(hotword_path)
            return HotwordsLayout()

        return html.Div()

    @app.callback(
        Output('data-table-body', 'children'),
        [Input('data-table-pagination', 'active_page')],
        [State('url', 'pathname')]
    )
    def update_table(page, pathname):
        model_name = pathname.split('/')[-1]
        filepath = f"{TRAINING_HOTWORD_DIR}/{model_name}/"
        training_data = list_files_in_directory(filepath, ".wav")
        rows = generate_training_data_table(model_name, training_data, page, page_size=10)
        return rows