"""
自动化液体处理工作站物料类定义 - 简化版
Automated Liquid Handling Station Resource Classes - Simplified Version
"""

from __future__ import annotations

from typing import Dict, List, Optional, TypeVar, Union, Sequence, Tuple

import pylabrobot

from pylabrobot.resources import Resource as ResourcePLR
from pylabrobot.resources import Well, ResourceHolder
from pylabrobot.resources.coordinate import Coordinate


LETTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"


class Bottle(Well):
    """瓶子类 - 简化版，不追踪瓶盖"""

    def __init__(
        self,
        name: str,
        diameter: float,
        height: float,
        max_volume: float,
        size_x: float = 0.0,
        size_y: float = 0.0,
        size_z: float = 0.0,
        barcode: Optional[str] = None,
        category: str = "container",
        model: Optional[str] = None,
        **kwargs,
    ):
        super().__init__(
            name=name,
            size_x=diameter,
            size_y=diameter,
            size_z=height,
            max_volume=max_volume,
            category=category,
            model=model,
            bottom_type="flat",
            cross_section_type="circle"
        )
        self.diameter = diameter
        self.height = height
        self.barcode = barcode

    def serialize(self) -> dict:
        return {
            **super().serialize(),
            "diameter": self.diameter,
            "height": self.height,
            "barcode": self.barcode,
        }

T = TypeVar("T", bound=ResourceHolder)

S = TypeVar("S", bound=ResourceHolder)


class ItemizedCarrier(ResourcePLR):
  """Base class for all carriers."""

  def __init__(
    self,
    name: str,
    size_x: float,
    size_y: float,
    size_z: float,
    num_items_x: int = 0,
    num_items_y: int = 0,
    num_items_z: int = 0,
    layout: str = "x-y",
    sites: Optional[Dict[Union[int, str], Optional[ResourcePLR]]] = None,
    category: Optional[str] = "carrier",
    model: Optional[str] = None,
    invisible_slots: Optional[str] = None,
  ):
    super().__init__(
      name=name,
      size_x=size_x,
      size_y=size_y,
      size_z=size_z,
      category=category,
      model=model,
    )
    self.num_items = len(sites)
    self.num_items_x, self.num_items_y, self.num_items_z = num_items_x, num_items_y, num_items_z
    self.invisible_slots = [] if invisible_slots is None else invisible_slots
    self.layout = "z-y" if self.num_items_z > 1 and self.num_items_x == 1 else "x-z" if self.num_items_z > 1 and self.num_items_y == 1 else "x-y"

    if isinstance(sites, dict):
      sites = sites or {}
      self.sites: List[Optional[ResourcePLR]] = list(sites.values())
      self._ordering = sites
      self.child_locations: Dict[str, Coordinate] = {}
      self.child_size: Dict[str, dict] = {}
      for spot, resource in sites.items():
        if resource is not None and getattr(resource, "location", None) is None:
          raise ValueError(f"resource {resource} has no location")
        if resource is not None:
          self.child_locations[spot] = resource.location
          self.child_size[spot] = {"width": resource._size_x, "height": resource._size_y, "depth": resource._size_z}
        else:
          self.child_locations[spot] = Coordinate.zero()
          self.child_size[spot] = {"width": 0, "height": 0, "depth": 0}
    elif isinstance(sites, list):
      # deserialize时走这里；还需要根据 self.sites 索引children
      self.child_locations = {site["label"]: Coordinate(**site["position"]) for site in sites}
      self.child_size = {site["label"]: site["size"] for site in sites}
      self.sites = [site["occupied_by"] for site in sites]
      self._ordering = {site["label"]: site["position"] for site in sites}
    else:
      print("sites:", sites)

  @property
  def capacity(self):
    """The number of sites on this carrier."""
    return len(self.sites)

  def __len__(self) -> int:
    """Return the number of sites on this carrier."""
    return len(self.sites)

  def assign_child_resource(
    self,
    resource: ResourcePLR,
    location: Optional[Coordinate],
    reassign: bool = True,
    spot: Optional[int] = None,
  ):
    idx = spot
    # 如果只给 location，根据坐标和 deserialize 后的 self.sites（持有names）来寻找 resource 该摆放的位置
    if spot is not None:
      idx = spot
    else:
      for i, site in enumerate(self.sites):
        site_location = list(self.child_locations.values())[i]
        if type(site) == str and site == resource.name:
          idx = i
          break
        if site_location == location:
          idx = i
          break
        
    if not reassign and self.sites[idx] is not None:
      raise ValueError(f"a site with index {idx} already exists")
    super().assign_child_resource(resource, location=location, reassign=reassign)
    self.sites[idx] = resource

  def assign_resource_to_site(self, resource: ResourcePLR, spot: int):
    if self.sites[spot] is not None and not isinstance(self.sites[spot], ResourceHolder):
      raise ValueError(f"spot {spot} already has a resource, {resource}")
    self.assign_child_resource(resource, location=self.child_locations.get(list(self._ordering.keys())[spot]), spot=spot)

  def unassign_child_resource(self, resource: ResourcePLR):
    found = False
    for spot, res in enumerate(self.sites):
      if res == resource:
        self.sites[spot] = None
        found = True
        break
    if not found:
      raise ValueError(f"Resource {resource} is not assigned to this carrier")
    super().unassign_child_resource(resource)
    # if hasattr(resource, "unassign"):
    #   resource.unassign()

  def get_child_identifier(self, child: ResourcePLR):
    """Get the identifier information for a given child resource.
    
    Args:
        child: The Resource object to find the identifier for
        
    Returns:
        dict: A dictionary containing:
            - identifier: The string identifier (e.g. "A1", "B2")
            - idx: The integer index in the sites list
            - x: The x index (column index, 0-based)
            - y: The y index (row index, 0-based)  
            - z: The z index (layer index, 0-based)
            
    Raises:
        ValueError: If the child resource is not found in this carrier
    """
    # Find the child resource in sites
    for idx, resource in enumerate(self.sites):
      if resource is child:
        # Get the identifier from ordering keys
        identifier = list(self._ordering.keys())[idx]
        
        # Parse identifier to get x, y, z indices
        x_idx, y_idx, z_idx = self._parse_identifier_to_indices(identifier, idx)
        
        return {
          "identifier": identifier,
          "idx": idx,
          "x": x_idx,
          "y": y_idx,
          "z": z_idx
        }
    
    # If not found, raise an error
    raise ValueError(f"Resource {child} is not assigned to this carrier")

  def _parse_identifier_to_indices(self, identifier: str, idx: int) -> Tuple[int, int, int]:
    """Parse identifier string to get x, y, z indices.
    
    Args:
        identifier: String identifier like "A1", "B2", etc.
        idx: Linear index as fallback for calculation
        
    Returns:
        Tuple of (x_idx, y_idx, z_idx)
    """
    # If we have explicit dimensions, calculate from idx
    if self.num_items_x > 0 and self.num_items_y > 0:
      # Calculate 3D indices from linear index
      z_idx = idx // (self.num_items_x * self.num_items_y) if self.num_items_z > 0 else 0
      remaining = idx % (self.num_items_x * self.num_items_y)
      y_idx = remaining // self.num_items_x
      x_idx = remaining % self.num_items_x
      return x_idx, y_idx, z_idx
    
    # Fallback: parse from Excel-style identifier
    if isinstance(identifier, str) and len(identifier) >= 2:
      # Extract row (letter) and column (number)
      row_letters = ""
      col_numbers = ""
      
      for char in identifier:
        if char.isalpha():
          row_letters += char
        elif char.isdigit():
          col_numbers += char
      
      if row_letters and col_numbers:
        # Convert letter(s) to row index (A=0, B=1, etc.)
        y_idx = 0
        for char in row_letters:
          y_idx = y_idx * 26 + (ord(char.upper()) - ord('A'))
        
        # Convert number to column index (1-based to 0-based)
        x_idx = int(col_numbers) - 1
        z_idx = 0  # Default layer
        
        return x_idx, y_idx, z_idx
    
    # If all else fails, assume linear arrangement
    return idx, 0, 0

  def __getitem__(
    self,
    identifier: Union[str, int, Sequence[int], Sequence[str], slice, range],
  ) -> Union[List[T], T]:
    """Get the items with the given identifier.

    This is a convenience method for getting the items with the given identifier. It is equivalent
    to :meth:`get_items`, but adds support for slicing and supports single items in the same
    functional call. Note that the return type will always be a list, even if a single item is
    requested.

    Examples:
      Getting the items with identifiers "A1" through "E1":

        >>> items["A1:E1"]

        [<Item A1>, <Item B1>, <Item C1>, <Item D1>, <Item E1>]

      Getting the items with identifiers 0 through 4 (note that this is the same as above):

        >>> items[range(5)]

        [<Item A1>, <Item B1>, <Item C1>, <Item D1>, <Item E1>]

      Getting items with a slice (note that this is the same as above):

        >>> items[0:5]

        [<Item A1>, <Item B1>, <Item C1>, <Item D1>, <Item E1>]

      Getting a single item:

        >>> items[0]

        [<Item A1>]
    """

    if isinstance(identifier, str):
      if ":" in identifier:  # multiple # TODO: deprecate this, use `"A1":"E1"` instead (slice)
        return self.get_items(identifier)

      return self.get_item(identifier)  # single

    if isinstance(identifier, int):
      return self.get_item(identifier)

    if isinstance(identifier, (slice, range)):
      start, stop = identifier.start, identifier.stop
      if isinstance(identifier.start, str):
        start = list(self._ordering.keys()).index(identifier.start)
      elif identifier.start is None:
        start = 0
      if isinstance(identifier.stop, str):
        stop = list(self._ordering.keys()).index(identifier.stop)
      elif identifier.stop is None:
        stop = self.num_items
      identifier = list(range(start, stop, identifier.step or 1))
      return self.get_items(identifier)

    if isinstance(identifier, (list, tuple)):
      return self.get_items(identifier)

    raise TypeError(f"Invalid identifier type: {type(identifier)}")

  def get_item(self, identifier: Union[str, int, Tuple[int, int]]) -> T:
    """Get the item with the given identifier.

    Args:
      identifier: The identifier of the item. Either a string, an integer, or a tuple. If an
      integer, it is the index of the item in the list of items (counted from 0, top to bottom, left
      to right).  If a string, it uses transposed MS Excel style notation, e.g. "A1" for the first
      item, "B1" for the item below that, etc. If a tuple, it is (row, column).

    Raises:
      IndexError: If the identifier is out of range. The range is 0 to self.num_items-1 (inclusive).
    """

    if isinstance(identifier, tuple):
      row, column = identifier
      identifier = LETTERS[row] + str(column + 1)  # standard transposed-Excel style notation
    if isinstance(identifier, str):
      try:
        identifier = list(self._ordering.keys()).index(identifier)
      except ValueError as e:
        raise IndexError(
          f"Item with identifier '{identifier}' does not exist on " f"resource '{self.name}'."
        ) from e

    if not 0 <= identifier < self.capacity:
      raise IndexError(
        f"Item with identifier '{identifier}' does not exist on " f"resource '{self.name}'."
      )

    # Cast child to item type. Children will always be `T`, but the type checker doesn't know that.
    return self.sites[identifier]

  def get_items(self, identifiers: Union[str, Sequence[int], Sequence[str]]) -> List[T]:
    """Get the items with the given identifier.

    Args:
      identifier: Deprecated. Use `identifiers` instead. # TODO(deprecate-ordered-items)
      identifiers: The identifiers of the items. Either a string range or a list of integers. If a
        string, it uses transposed MS Excel style notation. Regions of items can be specified using
        a colon, e.g. "A1:H1" for the first column. If a list of integers, it is the indices of the
        items in the list of items (counted from 0, top to bottom, left to right).

    Examples:
      Getting the items with identifiers "A1" through "E1":

        >>> items.get_items("A1:E1")

        [<Item A1>, <Item B1>, <Item C1>, <Item D1>, <Item E1>]

      Getting the items with identifiers 0 through 4:

        >>> items.get_items(range(5))

        [<Item A1>, <Item B1>, <Item C1>, <Item D1>, <Item E1>]
    """

    if isinstance(identifiers, str):
      identifiers = pylabrobot.utils.expand_string_range(identifiers)
    return [self.get_item(i) for i in identifiers]

  def __setitem__(self, idx: Union[int, str], resource: Optional[ResourcePLR]):
    """Assign a resource to this carrier."""
    if resource is None:  # setting to None
      assigned_resource = self[idx]
      if assigned_resource is not None:
        self.unassign_child_resource(assigned_resource)
    else:
      idx = list(self._ordering.keys()).index(idx) if isinstance(idx, str) else idx
      self.assign_resource_to_site(resource, spot=idx)

  def __delitem__(self, idx: int):
    """Unassign a resource from this carrier."""
    assigned_resource = self[idx]
    if assigned_resource is not None:
      self.unassign_child_resource(assigned_resource)

  def get_resources(self) -> List[ResourcePLR]:
    """Get all resources assigned to this carrier."""
    return [resource for resource in self.sites.values() if resource is not None]

  def __eq__(self, other):
    return super().__eq__(other) and self.sites == other.sites

  def get_free_sites(self) -> List[int]:
    return [spot for spot, resource in self.sites.items() if resource is None]

  def serialize(self):
    return {
      **super().serialize(),
      "num_items_x": self.num_items_x,
      "num_items_y": self.num_items_y,
      "num_items_z": self.num_items_z,
      "layout": self.layout,
      "sites": [{
        "label": str(identifier),
        "visible": False if identifier in self.invisible_slots else True,
        "occupied_by": self[identifier].name 
                        if isinstance(self[identifier], ResourcePLR) and not isinstance(self[identifier], ResourceHolder) else 
                        self[identifier] if isinstance(self[identifier], str) else None,
        "position": {"x": location.x, "y": location.y, "z": location.z},
        "size": self.child_size[identifier],
        "content_type": ["bottle", "container", "tube", "bottle_carrier", "tip_rack"]
      } for identifier, location in self.child_locations.items()]
    }


class BottleCarrier(ItemizedCarrier):
    """瓶载架 - 直接继承自 TubeCarrier"""

    def __init__(
        self,
        name: str,
        size_x: float,
        size_y: float,
        size_z: float,
        sites: Optional[Dict[Union[int, str], ResourceHolder]] = None,
        category: str = "bottle_carrier",
        model: Optional[str] = None,
        invisible_slots: List[str] = None,
        **kwargs,
    ):
        super().__init__(
            name=name,
            size_x=size_x,
            size_y=size_y,
            size_z=size_z,
            sites=sites,
            category=category,
            model=model,
            invisible_slots=invisible_slots,
        )