"""
CHRONOS Detect Command
======================

Commands for threat detection and security scanning.
"""

import time
from pathlib import Path
from typing import Optional, List
from enum import Enum

import typer
from rich.console import Console
from rich.table import Table
from rich.panel import Panel
from rich.progress import Progress, SpinnerColumn, TextColumn

from chronos.cli.utils import error_handler, create_progress, print_success, ScanError

console = Console()

app = typer.Typer(
    name="detect",
    help="🔍 Threat detection and security scanning commands.",
    rich_markup_mode="rich",
    no_args_is_help=True,
)


class ScanType(str, Enum):
    """Types of security scans available."""
    QUICK = "quick"
    FULL = "full"
    QUANTUM = "quantum"
    CUSTOM = "custom"


class OutputFormat(str, Enum):
    """Output format options."""
    TABLE = "table"
    JSON = "json"
    YAML = "yaml"


@app.command("scan")
def scan_command(
    target: Path = typer.Argument(
        ...,
        help="Target path to scan for threats.",
        exists=True,
    ),
    scan_type: ScanType = typer.Option(
        ScanType.QUICK,
        "--type",
        "-t",
        help="Type of scan to perform.",
    ),
    recursive: bool = typer.Option(
        True,
        "--recursive/--no-recursive",
        "-r/-R",
        help="Scan directories recursively.",
    ),
    output: OutputFormat = typer.Option(
        OutputFormat.TABLE,
        "--output",
        "-o",
        help="Output format.",
    ),
    exclude: Optional[List[str]] = typer.Option(
        None,
        "--exclude",
        "-e",
        help="Patterns to exclude from scan.",
    ),
) -> None:
    """
    🔍 Scan a target for security threats.
    
    Performs comprehensive threat detection including:
    - Malware signatures
    - Vulnerability patterns
    - Quantum-vulnerable cryptography
    - Insecure configurations
    
    [bold]Examples:[/bold]
        chronos detect scan ./myproject
        chronos detect scan /path/to/code --type full
        chronos detect scan . --type quantum --output json
    """
    with error_handler(console):
        console.print(Panel(
            f"[bold]Target:[/bold] {target.absolute()}\n"
            f"[bold]Scan Type:[/bold] {scan_type.value}\n"
            f"[bold]Recursive:[/bold] {recursive}",
            title="🔍 Starting Security Scan",
            border_style="blue",
        ))
        
        # Simulate scanning with progress
        with Progress(
            SpinnerColumn(),
            TextColumn("[bold blue]{task.description}"),
            console=console,
        ) as progress:
            task = progress.add_task("Initializing scanner...", total=None)
            time.sleep(0.5)
            
            progress.update(task, description="Scanning file signatures...")
            time.sleep(0.5)
            
            progress.update(task, description="Analyzing code patterns...")
            time.sleep(0.5)
            
            progress.update(task, description="Checking cryptographic implementations...")
            time.sleep(0.5)
            
            progress.update(task, description="Generating report...")
            time.sleep(0.3)
        
        # Display results
        table = Table(title="Scan Results", border_style="blue")
        table.add_column("Category", style="cyan")
        table.add_column("Findings", style="white")
        table.add_column("Risk", style="yellow")
        
        # Placeholder results
        table.add_row("Malware Signatures", "0 detected", "[green]Low[/green]")
        table.add_row("Vulnerabilities", "0 found", "[green]Low[/green]")
        table.add_row("Quantum Risks", "Analysis pending", "[yellow]Medium[/yellow]")
        table.add_row("Config Issues", "0 found", "[green]Low[/green]")
        
        console.print(table)
        print_success(console, f"Scan completed for {target}", "Scan Complete")


@app.command("threats")
def threats_command(
    active_only: bool = typer.Option(
        False,
        "--active",
        "-a",
        help="Show only active threats.",
    ),
    severity: Optional[str] = typer.Option(
        None,
        "--severity",
        "-s",
        help="Filter by severity (critical, high, medium, low).",
    ),
) -> None:
    """
    📋 List detected threats from previous scans.
    
    Shows a summary of all detected threats including:
    - Threat ID and name
    - Severity level
    - Detection timestamp
    - Current status
    """
    with error_handler(console):
        table = Table(title="Detected Threats", border_style="red")
        table.add_column("ID", style="dim")
        table.add_column("Threat", style="cyan")
        table.add_column("Severity", style="yellow")
        table.add_column("Status", style="green")
        table.add_column("Detected", style="dim")
        
        # Placeholder - no threats detected
        console.print(table)
        console.print("\n[green]✓[/green] No active threats detected.\n")


@app.command("watch")
def watch_command(
    target: Path = typer.Argument(
        Path("."),
        help="Directory to watch for threats.",
    ),
    interval: int = typer.Option(
        5,
        "--interval",
        "-i",
        help="Check interval in seconds.",
    ),
) -> None:
    """
    👁️ Watch a directory for real-time threat detection.
    
    Monitors the specified directory for:
    - New file creations
    - Suspicious modifications
    - Potential threat indicators
    
    [bold yellow]Note:[/bold yellow] Press Ctrl+C to stop watching.
    """
    with error_handler(console):
        console.print(Panel(
            f"[bold]Watching:[/bold] {target.absolute()}\n"
            f"[bold]Interval:[/bold] {interval}s\n\n"
            f"[dim]Press Ctrl+C to stop[/dim]",
            title="👁️ Real-time Threat Monitor",
            border_style="blue",
        ))
        
        # Placeholder - would implement file watching
        console.print("[yellow]⚠[/yellow] Watch mode not yet implemented.")
        console.print("[dim]This feature will monitor filesystem changes in real-time.[/dim]")


@app.command("signatures")
def signatures_command(
    update: bool = typer.Option(
        False,
        "--update",
        "-u",
        help="Update threat signatures from remote.",
    ),
) -> None:
    """
    📝 Manage threat detection signatures.
    
    View and update the threat signature database used for detection.
    """
    with error_handler(console):
        if update:
            with Progress(
                SpinnerColumn(),
                TextColumn("[bold blue]{task.description}"),
                console=console,
            ) as progress:
                task = progress.add_task("Updating signatures...", total=None)
                time.sleep(1)
            console.print("[green]✓[/green] Signatures updated successfully.")
        else:
            table = Table(title="Threat Signatures", border_style="blue")
            table.add_column("Category", style="cyan")
            table.add_column("Count", style="white")
            table.add_column("Last Updated", style="dim")
            
            table.add_row("Malware", "1,247", "2025-12-22")
            table.add_row("CVE Patterns", "3,891", "2025-12-22")
            table.add_row("Quantum Vulnerabilities", "156", "2025-12-22")
            table.add_row("Custom Rules", "0", "N/A")
            
            console.print(table)
