#!/usr/bin/env python3
"""
Roll command for the MeshCore Bot
Handles random number generation between 1 and X (default 100)
"""

import random
import re
from typing import Optional
from .base_command import BaseCommand
from ..models import MeshMessage


class RollCommand(BaseCommand):
    """Handles random number rolling commands.
    
    This command generates a random number between 1 and a specified maximum (default 100).
    It supports syntax like 'roll' or 'roll 50'.
    """
    
    # Plugin metadata
    name = "roll"
    keywords = ['roll']
    description = "Roll a random number between 1 and X (default 100). Use 'roll' for 1-100, 'roll 50' for 1-50, etc."
    category = "games"
    
    # Documentation
    short_description = "Roll a random number between 1 and X"
    usage = "roll [max]"
    examples = ["roll", "roll 50"]
    parameters = [
        {"name": "max", "description": "Maximum value (default: 100, max: 10000)"}
    ]
    
    def __init__(self, bot):
        """Initialize the roll command.
        
        Args:
            bot: The bot instance.
        """
        super().__init__(bot)
        self.roll_enabled = self.get_config_value('Roll_Command', 'enabled', fallback=True, value_type='bool')
    
    def can_execute(self, message: MeshMessage) -> bool:
        """Check if this command can be executed with the given message.
        
        Args:
            message: The message triggering the command.
            
        Returns:
            bool: True if command is enabled and checks pass, False otherwise.
        """
        if not self.roll_enabled:
            return False
        return super().can_execute(message)
    
    def get_help_text(self) -> str:
        """Get help text for the roll command.
        
        Returns:
            str: The help text for this command.
        """
        return self.translate('commands.roll.help')
    
    def matches_keyword(self, message: MeshMessage) -> bool:
        """Override to handle roll-specific matching.
        
        Custom matching logic to support variable maximums (e.g., "roll 50").
        
        Args:
            message: The message to check for a match.
            
        Returns:
            bool: True if the message matches the roll command syntax, False otherwise.
        """
        content = message.content.strip().lower()
        
        # Handle command-style messages
        if content.startswith('!'):
            content = content[1:].strip().lower()
        
        # Check for exact "roll" match
        if content == "roll":
            return True
        
        # Check for roll with parameters (roll 50, roll 1000, etc.)
        # Ensure "roll" is the first word and followed by valid number
        if content.startswith("roll "):
            words = content.split()
            if len(words) >= 2 and words[0] == "roll":
                roll_part = content[5:].strip()  # Get everything after "roll "
                # Check if the roll part is valid number notation (not just any word)
                max_num = self.parse_roll_notation(roll_part)
                return max_num is not None  # Only match if it's valid number notation
        
        return False
    
    def parse_roll_notation(self, roll_input: str) -> Optional[int]:
        """Parse roll notation and return the maximum number.
        
        Supports inputs like: 50, 100, 1000.
        
        Args:
            roll_input: The string part containing the number.
            
        Returns:
            Optional[int]: The maximum number if valid, None otherwise.
        """
        roll_input = roll_input.strip()
        
        # Handle direct number (e.g., "50", "100", "1000")
        if roll_input.isdigit():
            max_num = int(roll_input)
            if 1 <= max_num <= 10000:  # Reasonable limit
                return max_num
            else:
                return None
        
        return None
    
    def roll_number(self, max_num: int) -> int:
        """Roll a random number between 1 and max_num (inclusive).
        
        Args:
            max_num: The maximum possible value.
            
        Returns:
            int: The generated random number.
        """
        return random.randint(1, max_num)
    
    def format_roll_result(self, max_num: int, result: int) -> str:
        """Format roll result into a readable string.
        
        Args:
            max_num: The maximum number for the roll.
            result: The actual rolled number.
            
        Returns:
            str: The formatted result string.
        """
        return self.translate('commands.roll.result', max=max_num, result=result)
    
    async def execute(self, message: MeshMessage) -> bool:
        """Execute the roll command.
        
        Parses the maximum number (if provided), generates a random number,
        and sends the result to the user.
        
        Args:
            message: The message triggering the command.
            
        Returns:
            bool: True if executed successfully, False otherwise.
        """
        content = message.content.strip()
        
        # Handle command-style messages
        if content.startswith('!'):
            content = content[1:].strip()
        
        # Default to 1-100 if no specification
        if content.lower() == "roll":
            max_num = 100
        else:
            # Parse roll specification
            roll_part = content[5:].strip()  # Get everything after "roll "
            max_num = self.parse_roll_notation(roll_part)
            
            if max_num is None:
                # Invalid roll specification
                response = self.translate('commands.roll.invalid_number')
                return await self.send_response(message, response)
        
        # Roll the number
        result = self.roll_number(max_num)
        
        # Format and send response
        response = self.format_roll_result(max_num, result)
        return await self.send_response(message, response)