"""
OB16E Digital Output Module L5X Generator (Boilerplate-based)
============================================================

This module provides functionality to generate OB16E 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 OB16EModuleConfig(BaseModuleConfig):
    """Configuration for an OB16E module."""
    name: str
    boilerplate_path: str = "boilerplate/SLOT6_OB16E_Module.L5X"
    slot_address: str = "6"
    parent_module: str = "Local"
    parent_port_id: str = "1"
    output_device_names: Optional[Dict[int, str]] = None  # Names for 16 output 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,
            "output_device_names": self.output_device_names
        }


class OB16EModuleGenerator(BaseBoilerplateGenerator):
    """Generator for OB16E module L5X files using boilerplate template."""
    
    def apply_updates(self):
        """Apply OB16E-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 output device comments
        self.update_comments()
    
    def update_comments(self):
        """Update comments for output devices."""
        # Always clear template comments first
        output_comments = self.root.find(".//Connection[@Name='Fused']/OutputTag/Comments")
        if output_comments is None:
            return

        output_comments.clear()

        if not self.config.output_device_names:
            return

        for index, text in self.config.output_device_names.items():
            comment = ET.SubElement(output_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) -> "OB16EModuleGenerator":
        """Create and fully configure an OB16E 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 output index (0-15) to comment text.
        """

        cfg = OB16EModuleConfig(
            name=mapping["name"],
            slot_address=mapping["slot_address"],
            parent_module="Local",
            parent_port_id="1",
            output_device_names=comments,
        )

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


# Factory function
def create_ob16e_module(
    name: str,
    slot_address: str = "6",
    parent_module: str = "Local",
    parent_port_id: str = "1",
    output_device_names: Optional[Dict[int, str]] = None
) -> OB16EModuleConfig:
    """
    Create an OB16E 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
        output_device_names: Dictionary mapping output index (0-15) to device names
    
    Returns:
        OB16EModuleConfig object
    """
    return OB16EModuleConfig(
        name=name,
        slot_address=slot_address,
        parent_module=parent_module,
        parent_port_id=parent_port_id,
        output_device_names=output_device_names
    )


if __name__ == "__main__":
    # Example usage
    config = create_ob16e_module(
        name="SLOT3_OB16E",
        slot_address="3",
        parent_module="Local",
        parent_port_id="1",
        output_device_names={
            0: "Motor 1 Starter",
            1: "Motor 2 Starter",
            2: "Pump Control",
            3: "Valve 1 Open",
            4: "Valve 2 Close",
            5: "Alarm Horn",
            6: "Status Light Red",
            7: "Status Light Green",
            8: "Conveyor Start",
            9: "Fan Control",
            10: "Heater Enable",
            11: "Solenoid 1",
            12: "Solenoid 2",
            13: "Brake Release",
            14: "Emergency Light",
            15: "System Ready Lamp"
        }
    )
    
    # Generate the module
    generator = OB16EModuleGenerator(config)
    generator.save_to_file("generated/SLOT3_OB16E.L5X")
    print(f"Generated OB16E module configuration saved to generated/SLOT3_OB16E.L5X")