"""
IB16 Digital Input Module L5X Generator (Boilerplate-based)
===========================================================

This module provides functionality to generate IB16 module L5X files by
loading a boilerplate template and modifying specific fields.
"""

from dataclasses import dataclass
from typing import Optional, Dict
import xml.etree.ElementTree as ET
from .base_boilerplate_model import BaseModuleConfig, BaseBoilerplateGenerator


@dataclass
class IB16ModuleConfig(BaseModuleConfig):
    """Configuration for an IB16 module."""
    name: str
    boilerplate_path: str = "boilerplate/SLOT5_IB16_Module.L5X"
    slot_address: str = "5"
    parent_module: str = "Local"
    parent_port_id: str = "1"
    input_device_names: Optional[Dict[int, str]] = None  # Names for 16 input devices (0-15)
    
    def get_updates(self):
        """Get dictionary of updates to apply."""
        return {
            "name": self.name,
            "slot_address": self.slot_address,
            "parent_module": self.parent_module,
            "parent_port_id": self.parent_port_id,
            "input_device_names": self.input_device_names
        }


class IB16ModuleGenerator(BaseBoilerplateGenerator):
    """Generator for IB16 module L5X files using boilerplate template."""
    
    def apply_updates(self):
        """Apply IB16-specific updates to the boilerplate."""
        # Update TargetName in root element
        self.root.set("TargetName", self.config.name)
        
        # Update Module name and parent info
        module = self.root.find(".//Module[@Use='Target']")
        if module is not None:
            module.set("Name", self.config.name)
            module.set("ParentModule", self.config.parent_module)
            module.set("ParentModPortId", self.config.parent_port_id)
            
        # Update slot address (ICP port)
        icp_port = self.root.find(".//Module[@Use='Target']/Ports/Port[@Type='ICP']")
        if icp_port is not None:
            icp_port.set("Address", self.config.slot_address)
            
        # Update input device comments
        self.update_comments()
    
    def update_comments(self):
        """Update comments for input devices."""
        # Always clear boilerplate comments so callers can opt-in to add their
        # own.  When no mapping is supplied, the section remains empty.
        input_comments = self.root.find(".//Connection[@Name='StandardInput']/InputTag/Comments")
        if input_comments is None:
            return

        # Clear whatever the template had.
        input_comments.clear()

        if not self.config.input_device_names:
            return  # leave section empty (no comments)

        # Populate provided names
        for index, text in self.config.input_device_names.items():
            comment = ET.SubElement(input_comments, "Comment")
            comment.set("Operand", f".DATA.{index}")
            comment.text = text

    @classmethod
    def from_mapping(cls, mapping: Dict[str, str], comments: Optional[Dict[int, str]] = None) -> "IB16ModuleGenerator":
        """Create and fully configure an IB16 generator from the Excel-derived
        `modules` entry (a plain dict). The structure expected is the one
        produced in EnhancedMCMGenerator._organize_modules_by_type().

        :param comments: Optional dict of input index (0-15) to comment text.
        """

        cfg = IB16ModuleConfig(
            name=mapping["name"],
            slot_address=mapping["slot_address"],
            parent_module="Local",
            parent_port_id="1",
            input_device_names=comments,
        )

        gen = cls(cfg)
        gen.load_boilerplate()
        gen.apply_updates()
        return gen


# Factory function
def create_ib16_module(
    name: str,
    slot_address: str = "5",
    parent_module: str = "Local",
    parent_port_id: str = "1",
    input_device_names: Optional[Dict[int, str]] = None
) -> IB16ModuleConfig:
    """
    Create an IB16 module configuration.
    
    Args:
        name: Module name
        slot_address: Slot number in the chassis
        parent_module: Parent module name
        parent_port_id: Parent module port ID
        input_device_names: Dictionary mapping input index (0-15) to device names
    
    Returns:
        IB16ModuleConfig object
    """
    return IB16ModuleConfig(
        name=name,
        slot_address=slot_address,
        parent_module=parent_module,
        parent_port_id=parent_port_id,
        input_device_names=input_device_names
    )


if __name__ == "__main__":
    # Example usage
    config = create_ib16_module(
        name="SLOT4_IB16",
        slot_address="4",
        parent_module="Local",
        parent_port_id="1",
        input_device_names={
            0: "Emergency Stop",
            1: "Start Button",
            2: "Stop Button",
            3: "Reset Button",
            4: "Door Sensor",
            5: "Light Curtain",
            6: "Pressure Switch",
            7: "Flow Switch",
            8: "Level Sensor High",
            9: "Level Sensor Low",
            10: "Temperature Alarm",
            11: "Vibration Sensor",
            12: "Proximity Sensor 1",
            13: "Proximity Sensor 2", 
            14: "Limit Switch Up",
            15: "Limit Switch Down"
        }
    )
    
    # Generate the module
    generator = IB16ModuleGenerator(config)
    generator.save_to_file("generated/SLOT4_IB16.L5X")
    print(f"Generated IB16 module configuration saved to generated/SLOT4_IB16.L5X")