"""
Indicator modal component for creating and editing indicators.
"""

from dash import html, dcc
import dash_bootstrap_components as dbc
from utils.timeframe_utils import load_timeframe_options
from config.indicators.config_utils import get_indicator_dropdown_options, generate_parameter_fields_config


def create_dynamic_parameter_fields(indicator_type: str) -> html.Div:
    """Create parameter input fields dynamically based on indicator configuration.
    
    Args:
        indicator_type (str): The indicator type (e.g., 'sma', 'ema')
    
    Returns:
        html.Div: Div containing the parameter input fields
    """
    fields_config = generate_parameter_fields_config(indicator_type)
    
    if not fields_config:
        return html.Div(
            html.P("No parameters available for this indicator", className="text-muted fst-italic"),
            id=f'{indicator_type}-parameters',
            style={'display': 'none'},
            className="mb-3"
        )
    
    field_elements = []
    
    # Handle single parameter (like SMA, EMA, RSI)
    if len(fields_config) == 1:
        param_name, field_config = next(iter(fields_config.items()))
        field_elements.append(
            html.Div([
                dbc.Label(f"{field_config['label']}:"),
                dcc.Input(
                    id=field_config['input_id'],
                    type='number',
                    value=field_config['default'],
                    min=field_config.get('min'),
                    max=field_config.get('max'),
                    step=field_config.get('step', 1 if field_config['type'] == 'int' else 0.1)
                ),
                dbc.FormText(field_config['description']) if field_config['description'] else None
            ])
        )
    else:
        # Handle multiple parameters (like MACD, Bollinger Bands)
        rows = []
        params_per_row = min(len(fields_config), 4)  # Max 4 parameters per row
        
        param_items = list(fields_config.items())
        for i in range(0, len(param_items), params_per_row):
            row_params = param_items[i:i + params_per_row]
            cols = []
            
            for param_name, field_config in row_params:
                col = dbc.Col([
                    dbc.Label(f"{field_config['label']}:"),
                    dcc.Input(
                        id=field_config['input_id'],
                        type='number',
                        value=field_config['default'],
                        min=field_config.get('min'),
                        max=field_config.get('max'),
                        step=field_config.get('step', 1 if field_config['type'] == 'int' else 0.1)
                    )
                ], width=12 // len(row_params))
                cols.append(col)
            
            rows.append(dbc.Row(cols))
        
        field_elements.extend(rows)
        
        # Add description for multi-parameter indicators
        if any(config['description'] for config in fields_config.values()):
            descriptions = [f"{config['label']}: {config['description']}" 
                          for config in fields_config.values() if config['description']]
            field_elements.append(
                dbc.FormText("; ".join(descriptions))
            )
    
    return html.Div(
        field_elements,
        id=f'{indicator_type}-parameters',
        style={'display': 'none'},
        className="mb-3"
    )


def create_indicator_modal():
    """Create the indicator modal dialog for adding/editing indicators."""
    return html.Div([
        dcc.Store(id='edit-indicator-store', data=None),
        dbc.Modal([
            dbc.ModalHeader(dbc.ModalTitle("📊 Add New Indicator", id="modal-title")),
            dbc.ModalBody([
                # Basic Settings
                html.H5("Basic Settings"),
                dbc.Row([
                    dbc.Col(dbc.Label("Indicator Name:"), width=12),
                    dbc.Col(dcc.Input(id='indicator-name-input', type='text', placeholder='e.g., "SMA 30 Custom"', className="w-100"), width=12)
                ], className="mb-3"),
                dbc.Row([
                    dbc.Col(dbc.Label("Indicator Type:"), width=12),
                    dbc.Col(dcc.Dropdown(
                        id='indicator-type-dropdown',
                        options=get_indicator_dropdown_options(),
                        placeholder='Select indicator type',
                    ), width=12)
                ], className="mb-3"),
                dbc.Row([
                    dbc.Col(dbc.Label("Timeframe (Optional):"), width=12),
                    dbc.Col(dcc.Dropdown(
                        id='indicator-timeframe-dropdown',
                        options=[{'label': 'Chart Timeframe', 'value': ''}] + load_timeframe_options(),
                        value='',
                        placeholder='Defaults to chart timeframe'
                    ), width=12),
                ], className="mb-3"),
                dbc.Row([
                    dbc.Col(dbc.Label("Description (Optional):"), width=12),
                    dbc.Col(dcc.Textarea(
                        id='indicator-description-input',
                        placeholder='Brief description of this indicator configuration...',
                        style={'width': '100%', 'height': '60px'}
                    ), width=12)
                ], className="mb-3"),
                html.Hr(),
                
                # Parameters Section
                html.H5("Parameters"),
                html.Div(
                    id='indicator-parameters-message',
                    children=[html.P("Select an indicator type to configure parameters", className="text-muted fst-italic")]
                ),
                
                # Parameter fields (SMA, EMA, etc.)
                create_dynamic_parameter_fields('sma'),
                create_dynamic_parameter_fields('ema'),
                create_dynamic_parameter_fields('rsi'),
                create_dynamic_parameter_fields('macd'),
                create_dynamic_parameter_fields('bollinger_bands'),

                html.Hr(),
                # Styling Section
                html.H5("Styling"),
                dbc.Row([
                    dbc.Col([
                        dbc.Label("Color:"),
                        dcc.Input(id='indicator-color-input', type='text', value='#007bff', className="w-100")
                    ], width=6),
                    dbc.Col([
                        dbc.Label("Line Width:"),
                        dcc.Slider(id='indicator-line-width-slider', min=1, max=5, step=1, value=2, marks={i: str(i) for i in range(1, 6)})
                    ], width=6)
                ], className="mb-3"),
            ]),
            dbc.ModalFooter([
                html.Div(id='save-indicator-feedback', className="me-auto"),
                dbc.Button("Cancel", id="cancel-indicator-btn", color="secondary"),
                dbc.Button("Save Indicator", id="save-indicator-btn", color="primary")
            ])
        ], id='indicator-modal', size="lg", is_open=False),
    ])