"""
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
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")
    
    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
    
    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"""
        table = self.query_one("#flows-data-table", DataTable)
        
        # Compact columns optimized for data density
        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="rate")
        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")
        
        self.refresh_data()
    
    def refresh_data(self):
        """Refresh flow table with enhanced visualizations"""
        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()
        
        # Add flows with enhanced display
        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 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
            
            # Apply row styling based on status
            style = self._get_flow_style(flow)
            if style:
                # Note: DataTable doesn't have set_row_style, using CSS classes instead
                pass
            
            # Add sub-rows for protocol breakdown
            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)
        
        # 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 _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")
        
        # Rate with sparkline
        rate_spark = self._create_rate_sparkline(metrics['rate_history'])
        rate_text = Text(f"{metrics['rate_history'][-1]:.0f} {rate_spark}")
        
        # Size with actual value
        size_value = self._format_bytes(flow.total_bytes)
        size_text = Text(f"{size_value:>8}")
        
        # Delta T (average time between packets in ms)
        if flow.avg_inter_arrival > 0:
            delta_t_ms = flow.avg_inter_arrival * 1000
            if delta_t_ms >= 1000:
                delta_t_str = f"{delta_t_ms/1000:.1f}s"
            else:
                delta_t_str = f"{delta_t_ms:.1f}"
        else:
            delta_t_str = "N/A"
        delta_t_text = Text(delta_t_str, justify="right")
        
        # Sigma (standard deviation in ms)
        if flow.std_inter_arrival > 0:
            sigma_ms = flow.std_inter_arrival * 1000
            if sigma_ms >= 1000:
                sigma_str = f"{sigma_ms/1000:.1f}s"
            else:
                sigma_str = f"{sigma_ms:.1f}"
        else:
            sigma_str = "N/A"
        sigma_text = Text(sigma_str, justify="right")
        
        # Outlier count (packets outside tolerance)
        outlier_count = len(flow.outlier_frames)
        outlier_text = Text(str(outlier_count), justify="right", 
                           style="red" if outlier_count > 0 else "green")
        
        return [
            num_text, source_text, proto_text, dest_text,
            extended_text, frame_text, rate_text, size_text,
            delta_t_text, sigma_text, outlier_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 outlier percentage
            outlier_pct = len(flow.outlier_frames) / 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"
        elif len(flow.outlier_frames) > flow.frame_count * 0.1:
            return "Alert"
        elif len(flow.outlier_frames) > 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"""
        # Show subrows for flows with multiple frame types or enhanced analysis
        return (len(flow.frame_types) > 1 or 
                flow.enhanced_analysis.decoder_type != "Standard")
    
    def _create_protocol_subrows(self, flow: 'FlowStats') -> List[List[Text]]:
        """Create sub-rows for protocol/frame type breakdown"""
        subrows = []
        combinations = self._get_protocol_frame_combinations(flow)
        
        for extended_proto, frame_type, count, percentage in combinations[:3]:  # Max 3 subrows
            # 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]
                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"
                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"
                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")
            ]
            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()
    
    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()
        self.post_message(self.FlowSelected(selected_flow, subflow_type))
    
    # Helper methods from original implementation
    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"