"""
Enhanced Flow Table Widget - TipTop-inspired with inline visualizations
"""

from textual.widgets import DataTable
from textual.containers import Vertical
from textual.reactive import reactive
from textual.message import Message
from typing import TYPE_CHECKING, List, Optional, Dict, Tuple
from rich.text import Text
from rich.box import ROUNDED

if TYPE_CHECKING:
    from ....analysis.core import EthernetAnalyzer
    from ....models import FlowStats


class EnhancedFlowTable(Vertical):
    """
    Enhanced flow table with TipTop-style inline visualizations
    
    Features:
    - Inline sparklines for packet rate
    - Bar charts for volume and quality
    - Color-coded rows based on status
    - Hierarchical sub-rows for protocol breakdown
    """
    
    DEFAULT_CSS = """
    EnhancedFlowTable {
        height: 1fr;
        padding: 0;
        margin: 0;
    }
    
    EnhancedFlowTable DataTable {
        height: 1fr;
        scrollbar-gutter: stable;
        padding: 0;
        margin: 0;
    }
    """
    
    selected_flow_index = reactive(0)
    sort_key = reactive("flows")
    simplified_view = reactive(True)  # Default to simplified view without subflows
    
    def __init__(self, analyzer: 'EthernetAnalyzer', **kwargs):
        super().__init__(**kwargs)
        self.analyzer = analyzer
        self.flows_list = []
        self.row_to_flow_map = {}  # Map row keys to flow indices
        self.flow_metrics = {}  # Store per-flow metrics history
        self.view_mode_changed = False  # Track when view mode changes
    
    def compose(self):
        """Create the enhanced flow table"""
        # Table title with sort indicators
        yield DataTable(
            id="flows-data-table",
            cursor_type="row",
            zebra_stripes=True,
            show_header=True,
            show_row_labels=False
        )
    
    def on_mount(self):
        """Initialize the table"""
        self._setup_table_columns()
        self.refresh_data()
    
    def _setup_table_columns(self):
        """Setup table columns based on current view mode"""
        table = self.query_one("#flows-data-table", DataTable)
        
        # Clear existing columns if any
        if table.columns:
            table.clear(columns=True)
        
        if self.simplified_view:
            # Simplified view - only main flows with summary data
            table.add_column("#", width=3, key="num")
            table.add_column("Source", width=18, key="source") 
            table.add_column("Destination", width=18, key="dest")
            table.add_column("Protocol", width=8, key="protocol")
            table.add_column("Packets", width=8, key="packets")
            table.add_column("Volume", width=10, key="volume")
            table.add_column("Avg ΔT", width=8, key="avg_delta")
            table.add_column("Quality", width=8, key="quality")
            table.add_column("Status", width=10, key="status")
        else:
            # Detailed view - original layout with subflows
            table.add_column("#", width=2, key="num")
            table.add_column("Source", width=18, key="source")
            table.add_column("Proto", width=4, key="proto")
            table.add_column("Destination", width=18, key="dest")
            table.add_column("Extended", width=8, key="extended")
            table.add_column("Frame Type", width=10, key="frame_type")
            table.add_column("Pkts", width=6, key="packets")
            table.add_column("Size", width=8, key="volume")
            table.add_column("ΔT(ms)", width=8, key="delta_t")
            table.add_column("σ(ms)", width=8, key="sigma")
            table.add_column("Out", width=5, key="outliers")
            table.add_column("Rate", width=6, key="rate")
    
    def refresh_data(self):
        """Refresh flow table with current view mode"""
        # Check if view mode changed and rebuild table structure if needed
        if self.view_mode_changed:
            self._setup_table_columns()
            self.view_mode_changed = False
        
        table = self.query_one("#flows-data-table", DataTable)
        
        # Preserve cursor and scroll positions
        cursor_row = table.cursor_row
        cursor_column = table.cursor_column
        scroll_x = table.scroll_x
        scroll_y = table.scroll_y
        selected_row_key = None
        if table.rows and cursor_row < len(table.rows):
            selected_row_key = list(table.rows.keys())[cursor_row]
        
        table.clear()
        
        # Clear row mapping
        self.row_to_flow_map.clear()
        self.row_to_subflow_map = {}  # Map row keys to (flow_index, subflow_type)
        
        # Get and sort flows
        self.flows_list = self._get_sorted_flows()
        
        if self.simplified_view:
            self._populate_simplified_view()
        else:
            self._populate_detailed_view()
        
        # Restore cursor position
        if selected_row_key and selected_row_key in table.rows:
            row_index = list(table.rows.keys()).index(selected_row_key)
            table.move_cursor(row=row_index, column=cursor_column, animate=False)
        elif table.row_count > 0:
            # If original selection not found, try to maintain row position
            new_row = min(cursor_row, table.row_count - 1)
            table.move_cursor(row=new_row, column=cursor_column, animate=False)
        
        # Restore scroll position
        table.scroll_to(x=scroll_x, y=scroll_y, animate=False)
    
    def _populate_simplified_view(self):
        """Populate table with simplified flow summary data"""
        table = self.query_one("#flows-data-table", DataTable)
        
        for i, flow in enumerate(self.flows_list):
            # Create simplified row data - no subflows shown
            row_data = self._create_simplified_row(i + 1, flow)
            row_key = table.add_row(*row_data, key=f"flow_{i}")
            
            # Map row key to flow index
            self.row_to_flow_map[row_key] = i
    
    def _populate_detailed_view(self):
        """Populate table with detailed flow data including subflows"""
        table = self.query_one("#flows-data-table", DataTable)
        
        for i, flow in enumerate(self.flows_list):
            # Track metrics for this flow
            flow_key = f"{flow.src_ip}:{flow.src_port}-{flow.dst_ip}:{flow.dst_port}"
            if flow_key not in self.flow_metrics:
                self.flow_metrics[flow_key] = {
                    'rate_history': [],
                    'last_packet_count': flow.frame_count,
                    'last_update': flow.last_seen
                }
            
            # Calculate current rate
            metrics = self.flow_metrics[flow_key]
            time_delta = flow.last_seen - metrics['last_update'] if metrics['last_update'] else 1
            packet_delta = flow.frame_count - metrics['last_packet_count']
            current_rate = packet_delta / max(time_delta, 0.1)
            
            # Update metrics
            metrics['rate_history'].append(current_rate)
            if len(metrics['rate_history']) > 10:
                metrics['rate_history'].pop(0)
            metrics['last_packet_count'] = flow.frame_count
            metrics['last_update'] = flow.last_seen
            
            # Create row with detailed visualizations
            row_data = self._create_enhanced_row(i + 1, flow, metrics)
            row_key = table.add_row(*row_data, key=f"flow_{i}")
            
            # Map row key to flow index
            self.row_to_flow_map[row_key] = i
            
            # Add sub-rows for protocol breakdown (only in detailed view)
            if self._should_show_subrows(flow):
                sub_rows = self._create_protocol_subrows(flow)
                combinations = self._get_protocol_frame_combinations(flow)
                for j, sub_row in enumerate(sub_rows):
                    sub_key = table.add_row(*sub_row, key=f"flow_{i}_sub_{j}")
                    # Map sub-row to parent flow and subflow type
                    self.row_to_flow_map[sub_key] = i
                    if j < len(combinations):
                        _, frame_type, _, _ = combinations[j]
                        self.row_to_subflow_map[sub_key] = (i, frame_type)
    
    def _create_enhanced_row(self, num: int, flow: 'FlowStats', metrics: dict) -> List[Text]:
        """Create enhanced row with inline visualizations"""
        # Flow number
        num_text = Text(str(num), justify="right")
        
        # Source (truncated if needed)
        source = f"{flow.src_ip}:{flow.src_port}"
        source_text = Text(source[:20] + "..." if len(source) > 22 else source)
        
        # Protocol with color
        proto_text = Text(flow.transport_protocol, style="bold cyan")
        
        # Destination
        dest = f"{flow.dst_ip}:{flow.dst_port}"
        dest_text = Text(dest[:20] + "..." if len(dest) > 22 else dest)
        
        # Extended protocol
        extended = self._get_extended_protocol(flow)
        extended_text = Text(extended, style="yellow" if extended != "-" else "dim")
        
        # Frame type summary
        frame_summary = self._get_frame_summary(flow)
        frame_text = Text(frame_summary, style="blue")
        
        # Packet count (separate from rate)
        packets_text = Text(str(flow.frame_count), justify="right")
        
        # Rate sparkline (separate column)
        rate_spark = self._create_rate_sparkline(metrics['rate_history'])
        rate_text = Text(rate_spark, justify="center")
        
        # Size with actual value
        size_value = self._format_bytes(flow.total_bytes)
        size_text = Text(f"{size_value:>8}")
        
        # Delta T and Sigma - empty for main flows (subflows show the detail)
        delta_t_text = Text("", justify="right")
        sigma_text = Text("", justify="right")
        
        # Outlier count - sum of frame-type-specific outliers (not flow-level)
        frame_type_outlier_count = sum(len(ft_stats.outlier_frames) for ft_stats in flow.frame_types.values())
        outlier_text = Text(str(frame_type_outlier_count), justify="right", 
                           style="red" if frame_type_outlier_count > 0 else "green")
        
        return [
            num_text, source_text, proto_text, dest_text,
            extended_text, frame_text, packets_text, size_text,
            delta_t_text, sigma_text, outlier_text, rate_text
        ]
    
    def _create_simplified_row(self, num: int, flow: 'FlowStats') -> List[Text]:
        """Create simplified row with summary data only"""
        # Flow number
        num_text = Text(str(num), justify="right")
        
        # Source (IP only for simplified view)
        source_text = Text(flow.src_ip)
        
        # Destination (IP only for simplified view)
        dest_text = Text(flow.dst_ip)
        
        # Main protocol (transport + extended if available)
        extended = self._get_extended_protocol(flow)
        if extended != "-":
            protocol_str = f"{flow.transport_protocol}/{extended}"
        else:
            protocol_str = flow.transport_protocol
        protocol_text = Text(protocol_str, style="bold cyan")
        
        # Total packet count
        packets_text = Text(str(flow.frame_count), justify="right")
        
        # Total volume
        volume_text = Text(self._format_bytes(flow.total_bytes), justify="right")
        
        # Average delta T
        if flow.avg_inter_arrival > 0:
            delta_t_ms = flow.avg_inter_arrival * 1000
            if delta_t_ms >= 1000:
                avg_delta_str = f"{delta_t_ms/1000:.1f}s"
            else:
                avg_delta_str = f"{delta_t_ms:.1f}ms"
        else:
            avg_delta_str = "N/A"
        avg_delta_text = Text(avg_delta_str, justify="right")
        
        # Quality score as percentage
        quality_score = self._get_quality_score(flow)
        quality_text = Text(f"{quality_score}%", justify="right",
                           style="green" if quality_score >= 90 else 
                                 "yellow" if quality_score >= 70 else "red")
        
        # Flow status
        status = self._get_flow_status(flow)
        status_color = {
            "Enhanced": "bold blue",
            "Alert": "bold red", 
            "Warning": "yellow",
            "Normal": "green"
        }.get(status, "white")
        status_text = Text(status, style=status_color)
        
        return [
            num_text, source_text, dest_text, protocol_text,
            packets_text, volume_text, avg_delta_text, 
            quality_text, status_text
        ]
    
    def _create_rate_sparkline(self, history: List[float]) -> str:
        """Create mini sparkline for rate"""
        if not history:
            return "─" * 4
        
        spark_chars = " ▁▂▃▄▅▆▇█"
        data_min = min(history) if history else 0
        data_max = max(history) if history else 1
        
        if data_max == data_min:
            return "▄" * 4
        
        result = []
        for value in history[-4:]:  # Last 4 values
            normalized = (value - data_min) / (data_max - data_min)
            char_index = int(normalized * 8)
            result.append(spark_chars[char_index])
        
        return "".join(result)
    
    def _create_volume_bar(self, bytes_count: int) -> str:
        """Create bar chart for volume"""
        # Scale to GB for comparison
        gb = bytes_count / 1_000_000_000
        
        # Create bar (max 5 chars)
        if gb >= 10:
            return "█████"
        elif gb >= 1:
            filled = int(gb / 2)
            return "█" * filled + "░" * (5 - filled)
        else:
            # For smaller volumes, show at least one bar
            mb = bytes_count / 1_000_000
            if mb >= 100:
                return "█░░░░"
            else:
                return "▌░░░░"
    
    def _create_quality_bar(self, flow: 'FlowStats') -> tuple[str, str]:
        """Create quality bar chart with color"""
        quality = self._get_quality_score(flow)
        
        # Create bar (5 chars)
        filled = int(quality / 20)  # 0-100 -> 0-5
        bar = "█" * filled + "░" * (5 - filled)
        
        # Determine color
        if quality >= 90:
            color = "green"
        elif quality >= 70:
            color = "yellow"
        else:
            color = "red"
        
        return bar, color
    
    def _get_quality_score(self, flow: 'FlowStats') -> int:
        """Calculate quality score for flow"""
        if flow.enhanced_analysis.decoder_type != "Standard":
            return int(flow.enhanced_analysis.avg_frame_quality)
        else:
            # Base quality on frame-type-specific outlier percentage
            frame_type_outlier_count = sum(len(ft_stats.outlier_frames) for ft_stats in flow.frame_types.values())
            outlier_pct = frame_type_outlier_count / flow.frame_count * 100 if flow.frame_count > 0 else 0
            return max(0, int(100 - outlier_pct * 10))
    
    def _get_flow_status(self, flow: 'FlowStats') -> str:
        """Determine flow status"""
        if flow.enhanced_analysis.decoder_type != "Standard":
            return "Enhanced"
        else:
            # Use frame-type-specific outliers for status
            frame_type_outlier_count = sum(len(ft_stats.outlier_frames) for ft_stats in flow.frame_types.values())
            if frame_type_outlier_count > flow.frame_count * 0.1:
                return "Alert"
            elif frame_type_outlier_count > 0:
                return "Warning"
            else:
                return "Normal"
    
    def _get_flow_style(self, flow: 'FlowStats') -> Optional[str]:
        """Get styling for flow row"""
        status = self._get_flow_status(flow)
        if status == "Enhanced":
            return "bold"
        elif status == "Alert":
            return "bold red"
        elif status == "Warning":
            return "yellow"
        return None
    
    def _should_show_subrows(self, flow: 'FlowStats') -> bool:
        """Determine if flow should show protocol breakdown"""
        # Only show subrows if there are enhanced frame types
        enhanced_frame_types = self._get_enhanced_frame_types(flow)
        return len(enhanced_frame_types) > 0
    
    def _get_enhanced_frame_types(self, flow: 'FlowStats') -> Dict[str, 'FrameTypeStats']:
        """Get only frame types that belong to enhanced protocols"""
        enhanced_protocols = {'CHAPTER10', 'CH10', 'PTP', 'IENA'}
        enhanced_frame_types = {}
        
        for frame_type, stats in flow.frame_types.items():
            # Check if this frame type belongs to an enhanced protocol
            if any(enhanced_proto in frame_type for enhanced_proto in enhanced_protocols):
                enhanced_frame_types[frame_type] = stats
            elif frame_type.startswith(('CH10-', 'PTP-', 'IENA-')):
                enhanced_frame_types[frame_type] = stats
            elif frame_type in ('TMATS', 'TMATS-Data'):  # TMATS is part of Chapter 10
                enhanced_frame_types[frame_type] = stats
        
        return enhanced_frame_types
    
    def _get_enhanced_protocol_frame_combinations(self, flow: 'FlowStats', enhanced_frame_types: Dict[str, 'FrameTypeStats']) -> List[Tuple[str, str, int, float]]:
        """Get protocol/frame combinations for enhanced protocols only"""
        combinations = []
        total_packets = flow.frame_count
        
        # Group enhanced frame types by extended protocol
        protocol_frames = {}
        
        for frame_type, ft_stats in enhanced_frame_types.items():
            # Determine extended protocol for this frame type
            extended_proto = self._get_extended_protocol_for_frame(flow, frame_type)
            
            if extended_proto not in protocol_frames:
                protocol_frames[extended_proto] = []
            
            protocol_frames[extended_proto].append((frame_type, ft_stats.count))
        
        # Convert to list of tuples with percentages
        for extended_proto, frame_list in protocol_frames.items():
            for frame_type, count in frame_list:
                percentage = (count / total_packets * 100) if total_packets > 0 else 0
                combinations.append((extended_proto, frame_type, count, percentage))
        
        # Sort by count (descending)
        combinations.sort(key=lambda x: x[2], reverse=True)
        return combinations
    
    def _create_protocol_subrows(self, flow: 'FlowStats') -> List[List[Text]]:
        """Create sub-rows for protocol/frame type breakdown - matches details panel logic"""
        subrows = []
        
        # For enhanced flows, show ALL frame types (same logic as details panel)
        if flow.enhanced_analysis.decoder_type != "Standard":
            combinations = self._get_protocol_frame_combinations(flow)
        else:
            # For standard flows, only show enhanced frame types
            enhanced_frame_types = self._get_enhanced_frame_types(flow)
            combinations = self._get_enhanced_protocol_frame_combinations(flow, enhanced_frame_types)
        
        for extended_proto, frame_type, count, percentage in combinations:
            # Calculate timing for this frame type if available
            frame_delta_t = ""
            frame_sigma = ""
            frame_outliers = ""
            
            if frame_type in flow.frame_types:
                ft_stats = flow.frame_types[frame_type]
                
                # Always calculate timing if we have data, even if very small values
                if ft_stats.avg_inter_arrival > 0:
                    dt_ms = ft_stats.avg_inter_arrival * 1000
                    frame_delta_t = f"{dt_ms:.1f}" if dt_ms < 1000 else f"{dt_ms/1000:.1f}s"
                elif len(ft_stats.inter_arrival_times) >= 2:
                    # If avg is 0 but we have data, recalculate on the fly
                    import statistics
                    avg_arrival = statistics.mean(ft_stats.inter_arrival_times)
                    if avg_arrival > 0:
                        dt_ms = avg_arrival * 1000
                        frame_delta_t = f"{dt_ms:.1f}" if dt_ms < 1000 else f"{dt_ms/1000:.1f}s"
                
                if ft_stats.std_inter_arrival > 0:
                    sig_ms = ft_stats.std_inter_arrival * 1000
                    frame_sigma = f"{sig_ms:.1f}" if sig_ms < 1000 else f"{sig_ms/1000:.1f}s"
                elif len(ft_stats.inter_arrival_times) >= 2:
                    # If std is 0 but we have data, recalculate on the fly
                    import statistics
                    std_arrival = statistics.stdev(ft_stats.inter_arrival_times)
                    if std_arrival > 0:
                        sig_ms = std_arrival * 1000
                        frame_sigma = f"{sig_ms:.1f}" if sig_ms < 1000 else f"{sig_ms/1000:.1f}s"
                
                frame_outliers = str(len(ft_stats.outlier_frames))
            
            subrow = [
                Text(""),  # Empty flow number
                Text(""),  # Empty source
                Text(""),  # Empty protocol
                Text(""),  # Empty destination
                Text(f"  {extended_proto}", style="dim yellow"),
                Text(frame_type, style="dim blue"),
                Text(f"{count}", style="dim", justify="right"),
                Text(f"{self._format_bytes(count * (flow.total_bytes // flow.frame_count) if flow.frame_count > 0 else 0):>8}", style="dim"),
                Text(frame_delta_t, style="dim", justify="right"),
                Text(frame_sigma, style="dim", justify="right"),
                Text(frame_outliers, style="dim red" if frame_outliers and int(frame_outliers) > 0 else "dim", justify="right"),
                Text("", style="dim")  # Empty rate column for subrows
            ]
            subrows.append(subrow)
        
        return subrows
    
    def _get_sorted_flows(self) -> List['FlowStats']:
        """Get flows sorted by current sort key"""
        flows = list(self.analyzer.flows.values())
        
        if self.sort_key == "packets":
            flows.sort(key=lambda x: x.frame_count, reverse=True)
        elif self.sort_key == "volume":
            flows.sort(key=lambda x: x.total_bytes, reverse=True)
        elif self.sort_key == "quality":
            flows.sort(key=lambda x: self._get_quality_score(x), reverse=True)
        else:  # Default: sort by importance
            flows.sort(key=lambda x: (
                x.enhanced_analysis.decoder_type != "Standard",
                len(x.outlier_frames),
                x.frame_count
            ), reverse=True)
        
        return flows
    
    def sort_by(self, key: str):
        """Change sort order"""
        self.sort_key = key
        self.refresh_data()
    
    def toggle_view_mode(self):
        """Toggle between simplified and detailed view modes"""
        self.simplified_view = not self.simplified_view
        self.view_mode_changed = True
        self.refresh_data()
    
    def get_current_view_mode(self) -> str:
        """Get current view mode as string"""
        return "SIMPLIFIED" if self.simplified_view else "DETAILED"
    
    class FlowSelected(Message):
        """Message sent when a flow is selected"""
        def __init__(self, flow: Optional['FlowStats'], subflow_type: Optional[str] = None) -> None:
            self.flow = flow
            self.subflow_type = subflow_type
            super().__init__()
    
    def get_selected_flow(self) -> Optional['FlowStats']:
        """Get currently selected flow"""
        table = self.query_one("#flows-data-table", DataTable)
        if table.cursor_row is None or not table.rows:
            return None
            
        # Get the row key at cursor position
        row_keys = list(table.rows.keys())
        if table.cursor_row >= len(row_keys):
            return None
            
        row_key = row_keys[table.cursor_row]
        
        # Look up flow index from our mapping
        flow_idx = self.row_to_flow_map.get(row_key)
        if flow_idx is not None and 0 <= flow_idx < len(self.flows_list):
            return self.flows_list[flow_idx]
        
        return None
    
    def get_selected_subflow_type(self) -> Optional[str]:
        """Get currently selected sub-flow type if applicable"""
        table = self.query_one("#flows-data-table", DataTable)
        if table.cursor_row is None or not table.rows:
            return None
            
        # Get the row key at cursor position
        row_keys = list(table.rows.keys())
        if table.cursor_row >= len(row_keys):
            return None
            
        row_key = row_keys[table.cursor_row]
        
        # Check if this is a sub-row
        if row_key in self.row_to_subflow_map:
            _, subflow_type = self.row_to_subflow_map[row_key]
            return subflow_type
        
        return None
    
    def on_data_table_row_highlighted(self, event: DataTable.RowHighlighted) -> None:
        """Handle row highlight to update selection"""
        selected_flow = self.get_selected_flow()
        subflow_type = self.get_selected_subflow_type()
        
        # Debug through app's debug panel
        flow_info = f"{selected_flow.src_ip}:{selected_flow.src_port}" if selected_flow else "None"
        table = self.query_one("#flows-data-table", DataTable)
        current_row = table.cursor_row if table.cursor_row is not None else -1
        
        try:
            debug_panel = self.app.query_one("#debug-panel")
            debug_panel.add_debug_message(f"TABLE: Row {current_row} - {flow_info}, subflow:{subflow_type}")
        except:
            pass  # Debug panel might not be available yet
        
        self.post_message(self.FlowSelected(selected_flow, subflow_type))
    
    # Helper methods from original implementation
    def _get_extended_protocol_for_frame(self, flow: 'FlowStats', frame_type: str) -> str:
        """Get extended protocol for a specific frame type"""
        if frame_type.startswith('CH10') or frame_type == 'TMATS':
            return 'CH10'
        elif frame_type.startswith('PTP'):
            return 'PTP'
        elif frame_type == 'IENA':
            return 'IENA'
        elif frame_type == 'NTP':
            return 'NTP'
        else:
            return self._get_extended_protocol(flow)
    
    def _get_extended_protocol(self, flow: 'FlowStats') -> str:
        """Get extended protocol"""
        if flow.detected_protocol_types:
            enhanced_protocols = {'CHAPTER10', 'CH10', 'PTP', 'IENA'}
            found = flow.detected_protocol_types & enhanced_protocols
            if found:
                protocol = list(found)[0]
                return 'CH10' if protocol in ['CHAPTER10', 'CH10'] else protocol
        return '-'
    
    def _get_frame_summary(self, flow: 'FlowStats') -> str:
        """Get frame type summary"""
        if not flow.frame_types:
            return "General"
        elif len(flow.frame_types) == 1:
            return list(flow.frame_types.keys())[0][:11]
        else:
            return f"{len(flow.frame_types)} types"
    
    def _get_protocol_frame_combinations(self, flow: 'FlowStats'):
        """Get protocol/frame combinations"""
        combinations = []
        total = flow.frame_count
        
        for frame_type, stats in flow.frame_types.items():
            extended = self._get_extended_protocol(flow)
            percentage = (stats.count / total * 100) if total > 0 else 0
            combinations.append((extended, frame_type, stats.count, percentage))
        
        return sorted(combinations, key=lambda x: x[2], reverse=True)
    
    def _format_bytes(self, bytes_count: int) -> str:
        """Format byte count"""
        if bytes_count >= 1_000_000_000:
            return f"{bytes_count / 1_000_000_000:.1f}G"
        elif bytes_count >= 1_000_000:
            return f"{bytes_count / 1_000_000:.1f}M"
        elif bytes_count >= 1_000:
            return f"{bytes_count / 1_000:.1f}K"
        else:
            return f"{bytes_count}B"