#!/usr/bin/env python3
"""
Smart Executor - Automatically choose between SSH and WinRM
Based on script size and complexity
"""

import os
import sys
import subprocess
from pathlib import Path
from winrm import Session


class SmartExecutor:
    def __init__(self, host=None, username=None, password=None):
        self.host = host or os.getenv('HOST', '192.168.88.108')
        self.username = username or os.getenv('USER_NAME', 'Admin')
        self.password = password or os.getenv('PASS', 'P@ssw0rd!')

    def analyze_script(self, script_path):
        """Analyze script to determine best execution method"""
        script_path = Path(script_path)

        if not script_path.exists():
            return None

        # Get script size
        size = script_path.stat().st_size

        # Read content for analysis
        with open(script_path, 'r', encoding='utf-8') as f:
            content = f.read()

        lines = len(content.split('\n'))
        chars = len(content)

        analysis = {
            'size_bytes': size,
            'lines': lines,
            'characters': chars,
            'has_file_operations': any(keyword in content.lower() for keyword in
                                     ['out-file', 'copy-item', 'move-item', 'new-item', 'remove-item']),
            'has_long_commands': any(len(line) > 500 for line in content.split('\n')),
            'complexity_score': lines + (chars / 100) + (size / 1000)
        }

        return analysis

    def choose_method(self, script_path):
        """Choose optimal execution method"""
        analysis = self.analyze_script(script_path)

        if not analysis:
            return "error"

        # Decision logic
        if analysis['size_bytes'] > 5000:  # Large scripts
            return "ssh"
        elif analysis['lines'] > 100:  # Many lines
            return "ssh"
        elif analysis['has_file_operations']:  # File operations
            return "ssh"
        elif analysis['has_long_commands']:  # Very long command lines
            return "ssh"
        elif analysis['complexity_score'] > 150:  # Complex scripts
            return "ssh"
        else:
            return "winrm"  # Simple, fast execution

    def execute_via_ssh(self, script_path):
        """Execute script using SSH method"""
        script_name = Path(script_path).stem
        ssh_script = f"{script_name}.sh"

        if not Path(ssh_script).exists():
            print(f"❌ SSH wrapper {ssh_script} not found")
            return False

        try:
            result = subprocess.run([f'./{ssh_script}'], capture_output=False, timeout=300)
            return result.returncode == 0
        except Exception as e:
            print(f"❌ SSH execution failed: {e}")
            return False

    def execute_via_winrm(self, script_path):
        """Execute script using WinRM method"""
        try:
            # Read and execute script content directly
            with open(script_path, 'r', encoding='utf-8') as f:
                script_content = f.read()

            # Connect via WinRM
            session = Session(
                f'http://{self.host}:5985/wsman',
                auth=(self.username, self.password),
                transport='ntlm'
            )

            # Execute PowerShell
            result = session.run_ps(script_content)

            # Output results
            if result.std_out:
                output = result.std_out.decode('utf-8', errors='replace')
                for line in output.split('\n'):
                    if line.strip():
                        print(line)

            if result.std_err:
                error = result.std_err.decode('utf-8', errors='replace')
                if error.strip():
                    for line in error.split('\n'):
                        if line.strip():
                            print(f"ERROR: {line}")

            return result.status_code == 0

        except Exception as e:
            print(f"❌ WinRM execution failed: {e}")
            return False

    def execute(self, script_path):
        """Smart execute with automatic method selection"""
        script_path = Path(script_path)

        print(f"🧠 Analyzing script: {script_path.name}")

        analysis = self.analyze_script(script_path)
        method = self.choose_method(script_path)

        print(f"📊 Script analysis:")
        print(f"   Size: {analysis['size_bytes']} bytes")
        print(f"   Lines: {analysis['lines']}")
        print(f"   Complexity: {analysis['complexity_score']:.1f}")
        print(f"   File operations: {analysis['has_file_operations']}")

        print(f"⚡ Selected method: {method.upper()}")

        if method == "ssh":
            print("🔗 Executing via SSH (for large/complex scripts)")
            return self.execute_via_ssh(script_path)
        elif method == "winrm":
            print("⚡ Executing via WinRM (for speed)")
            return self.execute_via_winrm(script_path)
        else:
            print("❌ Unable to determine execution method")
            return False


def main():
    if len(sys.argv) != 2:
        print("Usage: python3 smart_executor.py <script.ps1>")
        sys.exit(1)

    script_path = sys.argv[1]
    executor = SmartExecutor()

    print("🎯 Smart PowerShell Executor")
    print("============================")

    success = executor.execute(script_path)

    if success:
        print(f"\n✅ Script execution completed successfully")
    else:
        print(f"\n❌ Script execution failed")
        sys.exit(1)


if __name__ == "__main__":
    main()