"""
System health monitoring layout for the dashboard.
"""

from dash import html
import dash_bootstrap_components as dbc

def create_quick_status_card(title, component_id, icon):
    """Helper to create a quick status card."""
    return dbc.Card(dbc.CardBody([
        html.H5(f"{icon} {title}", className="card-title"),
        html.Div(id=component_id, children=[
            dbc.Badge("Checking...", color="warning", className="me-1")
        ])
    ]), className="text-center")

def _create_header_section():
    """Creates the header section for the system health layout."""
    return html.Div([
        html.H2("⚙️ System Health & Data Monitoring"),
        html.P("Real-time monitoring of data collection services, database health, and system performance",
               className="lead")
    ], className="p-5 mb-4 bg-light rounded-3")

def _create_quick_status_row():
    """Creates the quick status overview row."""
    return dbc.Row([
        dbc.Col(create_quick_status_card("Data Collection", "data-collection-quick-status", "📊"), width=3),
        dbc.Col(create_quick_status_card("Database", "database-quick-status", "🗄️"), width=3),
        dbc.Col(create_quick_status_card("Redis", "redis-quick-status", "🔗"), width=3),
        dbc.Col(create_quick_status_card("Performance", "performance-quick-status", "📈"), width=3),
    ], className="mb-4")

def _create_data_collection_service_card():
    """Creates the data collection service status card."""
    return dbc.Card([
        dbc.CardHeader(html.H4("📡 Data Collection Service")),
        dbc.CardBody([
            html.H5("Service Status", className="card-title"),
            html.Div(id='data-collection-service-status', className="mb-4"),
            
            html.H5("Collection Metrics", className="card-title"),
            html.Div(id='data-collection-metrics', className="mb-4"),
            
            html.H5("Service Controls", className="card-title"),
            dbc.ButtonGroup([
                dbc.Button("🔄 Refresh Status", id="refresh-data-status-btn", color="primary", outline=True, size="sm"),
                dbc.Button("📊 View Details", id="view-collection-details-btn", color="secondary", outline=True, size="sm"),
                dbc.Button("📋 View Logs", id="view-collection-logs-btn", color="info", outline=True, size="sm")
            ])
        ])
    ], className="mb-4")

def _create_individual_collectors_card():
    """Creates the individual collectors health card."""
    return dbc.Card([
        dbc.CardHeader(html.H4("🔌 Individual Collectors")),
        dbc.CardBody([
            html.Div(id='individual-collectors-status'),
            html.Div([
                dbc.Alert(
                    "Collector health data will be displayed here when the data collection service is running.",
                    id="collectors-info-alert",
                    color="info",
                    is_open=True,
                )
            ], id='collectors-placeholder')
        ])
    ], className="mb-4")

def _create_database_status_card():
    """Creates the database health status card."""
    return dbc.Card([
        dbc.CardHeader(html.H4("🗄️ Database Health")),
        dbc.CardBody([
            html.H5("Connection Status", className="card-title"),
            html.Div(id='database-status', className="mb-3"),
            html.Hr(),
            html.H5("Database Statistics", className="card-title"),
            html.Div(id='database-stats')
        ])
    ], className="mb-4")

def _create_redis_status_card():
    """Creates the Redis health status card."""
    return dbc.Card([
        dbc.CardHeader(html.H4("🔗 Redis Status")),
        dbc.CardBody([
            html.H5("Connection Status", className="card-title"),
            html.Div(id='redis-status', className="mb-3"),
            html.Hr(),
            html.H5("Redis Statistics", className="card-title"),
            html.Div(id='redis-stats')
        ])
    ], className="mb-4")

def _create_system_performance_card():
    """Creates the system performance metrics card."""
    return dbc.Card([
        dbc.CardHeader(html.H4("📈 System Performance")),
        dbc.CardBody([
            html.Div(id='system-performance-metrics')
        ])
    ], className="mb-4")

def _create_collection_details_modal():
    """Creates the data collection details modal."""
    return dbc.Modal([
        dbc.ModalHeader(dbc.ModalTitle("📊 Data Collection Details")),
        dbc.ModalBody(id="collection-details-content")
    ], id="collection-details-modal", is_open=False, size="lg")

def _create_collection_logs_modal():
    """Creates the collection service logs modal."""
    return dbc.Modal([
        dbc.ModalHeader(dbc.ModalTitle("📋 Collection Service Logs")),
        dbc.ModalBody(
            html.Div(
                html.Pre(id="collection-logs-content", style={'max-height': '400px', 'overflow-y': 'auto'}),
                style={'white-space': 'pre-wrap', 'background-color': '#f8f9fa', 'padding': '15px', 'border-radius': '5px'}
            )
        ),
        dbc.ModalFooter([
            dbc.Button("Refresh", id="refresh-logs-btn", color="primary"),
            dbc.Button("Close", id="close-logs-modal", color="secondary", className="ms-auto")
        ])
    ], id="collection-logs-modal", is_open=False, size="xl")

def get_system_health_layout():
    """Create the enhanced system health monitoring layout with Bootstrap components."""
    return html.Div([
        _create_header_section(),
        _create_quick_status_row(),
        
        dbc.Row([
            dbc.Col([
                _create_data_collection_service_card(),
                _create_individual_collectors_card(),
            ], width=6),
            
            dbc.Col([
                _create_database_status_card(),
                _create_redis_status_card(),
                _create_system_performance_card(),
            ], width=6)
        ]),
        
        _create_collection_details_modal(),
        _create_collection_logs_modal()
    ])