from dataclasses import dataclass, field
from typing import List, Optional, Tuple, Dict
import uuid
from enum import Enum
import json
import numpy as np

# ======================== Point ======================== #
class ConnectionType(Enum):
    SOLID = "solid"
    DASHED = "dashed"
    PHANTOM = "phantom"

@dataclass
class Coordinates:
    x: int
    y: int

@dataclass
class BBox:
    xmin: int
    ymin: int
    xmax: int
    ymax: int

    def width(self) -> int:
        return self.xmax - self.xmin

    def height(self) -> int:
        return self.ymax - self.ymin

class JunctionType(str, Enum):
    T = "T"
    L = "L"
    END = "END"

@dataclass
class Point:
    coords: Coordinates
    bbox: BBox
    type: JunctionType
    confidence: float = 1.0
    id: str = field(default_factory=lambda: str(uuid.uuid4()))


# # ======================== Symbol ======================== #
# class SymbolType(Enum):
#     VALVE = "valve"
#     PUMP = "pump"
#     SENSOR = "sensor"
#     # Add others as needed
#
class ValveSubtype(Enum):
    GATE = "gate"
    GLOBE = "globe"
    BUTTERFLY = "butterfly"
#
# @dataclass
# class Symbol:
#     symbol_type: SymbolType
#     bbox: BBox
#     center: Coordinates
#     connections: List[Point] = field(default_factory=list)
#     subtype: Optional[ValveSubtype] = None
#     id: str = field(default_factory=lambda: str(uuid.uuid4()))
#     confidence: float = 0.95
#     model_metadata: dict = field(default_factory=dict)


# ======================== Symbol ======================== #
class SymbolType(Enum):
    VALVE = "valve"
    PUMP = "pump"
    SENSOR = "sensor"
    OTHER = "other"  # Added to handle unknown categories

@dataclass
class Symbol:
    center: Coordinates
    symbol_type: SymbolType = field(default=SymbolType.OTHER)
    id: str = field(default_factory=lambda: str(uuid.uuid4()))
    class_id: int = -1
    original_label: str = ""
    category: str = ""  # e.g., "inst"
    type: str = ""  # e.g., "ind"
    label: str = ""  # e.g., "Solenoid_actuator"
    bbox: BBox = None
    confidence: float = 0.95
    model_source: str = ""  # e.g., "model2"
    connections: List[Point] = field(default_factory=list)
    subtype: Optional[ValveSubtype] = None
    model_metadata: dict = field(default_factory=dict)

    def __post_init__(self):
        """
        Handle any additional post-processing after initialization.
        """
        # Ensure bbox is a BBox object
        if isinstance(self.bbox, list) and len(self.bbox) == 4:
            self.bbox = BBox(*self.bbox)


# ======================== Line ======================== #
@dataclass
class LineStyle:
    connection_type: ConnectionType
    stroke_width: int = 2
    color: str = "#000000"  # CSS-style colors

@dataclass
class Line:
    start: Point
    end: Point
    bbox: BBox
    id: str = field(default_factory=lambda: str(uuid.uuid4()))
    style: LineStyle = field(default_factory=lambda: LineStyle(ConnectionType.SOLID))
    confidence: float = 0.90
    topological_links: List[str] = field(default_factory=list)  # Linked symbols/junctions


# ======================== Junction ======================== #
class JunctionType(str, Enum):
    T = "T"
    L = "L"
    END = "END"

@dataclass
class JunctionProperties:
    flow_direction: Optional[str] = None  # "in", "out"
    pressure: Optional[float] = None  # kPa

@dataclass
class Junction:
    center: Coordinates
    junction_type: JunctionType
    id: str = field(default_factory=lambda: str(uuid.uuid4()))
    properties: JunctionProperties = field(default_factory=JunctionProperties)
    connected_lines: List[str] = field(default_factory=list)  # Line IDs


# # ======================== Tag ======================== #
# @dataclass
# class Tag:
#     text: str
#     bbox: BBox
#     associated_element: str  # ID of linked symbol/line
#     id: str = field(default_factory=lambda: str(uuid.uuid4()))
#     font_size: int = 12
#     rotation: float = 0.0  # Degrees

@dataclass
class Tag:
    text: str
    bbox: BBox
    confidence: float = 1.0
    source: str = ""  # e.g., "easyocr"
    text_type: str = "Unknown"  # e.g., "Unknown", could be something else later
    id: str = field(default_factory=lambda: str(uuid.uuid4()))
    associated_element: Optional[str] = None  # ID of linked symbol/line (can be None)
    font_size: int = 12
    rotation: float = 0.0  # Degrees

    def __post_init__(self):
        """
        Ensure bbox is properly converted.
        """
        if isinstance(self.bbox, list) and len(self.bbox) == 4:
            self.bbox = BBox(*self.bbox)

# ----------------------------
# DETECTION CONTEXT
# ----------------------------

@dataclass
class DetectionContext:
    """
    In-memory container for all detected elements (lines, points, symbols, junctions, tags).
    Each element is stored in a dict keyed by 'id' for quick lookup and update.
    """
    lines: Dict[str, Line] = field(default_factory=dict)
    points: Dict[str, Point] = field(default_factory=dict)
    symbols: Dict[str, Symbol] = field(default_factory=dict)
    junctions: Dict[str, Junction] = field(default_factory=dict)
    tags: Dict[str, Tag] = field(default_factory=dict)

    # -------------------------
    # 1) ADD / GET / REMOVE
    # -------------------------
    def add_line(self, line: Line) -> None:
        self.lines[line.id] = line

    def get_line(self, line_id: str) -> Optional[Line]:
        return self.lines.get(line_id)

    def remove_line(self, line_id: str) -> None:
        self.lines.pop(line_id, None)

    def add_point(self, point: Point) -> None:
        self.points[point.id] = point

    def get_point(self, point_id: str) -> Optional[Point]:
        return self.points.get(point_id)

    def remove_point(self, point_id: str) -> None:
        self.points.pop(point_id, None)

    def add_symbol(self, symbol: Symbol) -> None:
        self.symbols[symbol.id] = symbol

    def get_symbol(self, symbol_id: str) -> Optional[Symbol]:
        return self.symbols.get(symbol_id)

    def remove_symbol(self, symbol_id: str) -> None:
        self.symbols.pop(symbol_id, None)

    def add_junction(self, junction: Junction) -> None:
        self.junctions[junction.id] = junction

    def get_junction(self, junction_id: str) -> Optional[Junction]:
        return self.junctions.get(junction_id)

    def remove_junction(self, junction_id: str) -> None:
        self.junctions.pop(junction_id, None)

    def add_tag(self, tag: Tag) -> None:
        self.tags[tag.id] = tag

    def get_tag(self, tag_id: str) -> Optional[Tag]:
        return self.tags.get(tag_id)

    def remove_tag(self, tag_id: str) -> None:
        self.tags.pop(tag_id, None)

    # -------------------------
    # 2) SERIALIZATION: to_dict / from_dict
    # -------------------------
    def to_dict(self) -> dict:
        """Convert all stored objects into a JSON-serializable dictionary."""
        return {
            "lines": [self._line_to_dict(line) for line in self.lines.values()],
            "points": [self._point_to_dict(pt) for pt in self.points.values()],
            "symbols": [self._symbol_to_dict(sym) for sym in self.symbols.values()],
            "junctions": [self._junction_to_dict(jn) for jn in self.junctions.values()],
            "tags": [self._tag_to_dict(tg) for tg in self.tags.values()]
        }

    @classmethod
    def from_dict(cls, data: dict) -> "DetectionContext":
        """
        Create a new DetectionContext from a dictionary structure (e.g. loaded from JSON).
        """
        context = cls()

        # Points
        for pt_dict in data.get("points", []):
            pt_obj = cls._point_from_dict(pt_dict)
            context.add_point(pt_obj)

        # Lines
        for ln_dict in data.get("lines", []):
            ln_obj = cls._line_from_dict(ln_dict)
            context.add_line(ln_obj)

        # Symbols
        for sym_dict in data.get("symbols", []):
            sym_obj = cls._symbol_from_dict(sym_dict)
            context.add_symbol(sym_obj)

        # Junctions
        for jn_dict in data.get("junctions", []):
            jn_obj = cls._junction_from_dict(jn_dict)
            context.add_junction(jn_obj)

        # Tags
        for tg_dict in data.get("tags", []):
            tg_obj = cls._tag_from_dict(tg_dict)
            context.add_tag(tg_obj)

        return context

    # -------------------------
    # 3) HELPER METHODS FOR (DE)SERIALIZATION
    # -------------------------
    @staticmethod
    def _bbox_to_dict(bbox: BBox) -> dict:
        return {
            "xmin": bbox.xmin,
            "ymin": bbox.ymin,
            "xmax": bbox.xmax,
            "ymax": bbox.ymax
        }

    @staticmethod
    def _bbox_from_dict(d: dict) -> BBox:
        return BBox(
            xmin=d["xmin"],
            ymin=d["ymin"],
            xmax=d["xmax"],
            ymax=d["ymax"]
        )

    @staticmethod
    def _coords_to_dict(coords: Coordinates) -> dict:
        return {
            "x": coords.x,
            "y": coords.y
        }

    @staticmethod
    def _coords_from_dict(d: dict) -> Coordinates:
        return Coordinates(x=d["x"], y=d["y"])

    @staticmethod
    def _line_style_to_dict(style: LineStyle) -> dict:
        return {
            "connection_type": style.connection_type.value,
            "stroke_width": style.stroke_width,
            "color": style.color
        }

    @staticmethod
    def _line_style_from_dict(d: dict) -> LineStyle:
        return LineStyle(
            connection_type=ConnectionType(d["connection_type"]),
            stroke_width=d.get("stroke_width", 2),
            color=d.get("color", "#000000")
        )

    @staticmethod
    def _point_to_dict(pt: Point) -> dict:
        return {
            "id": pt.id,
            "coords": DetectionContext._coords_to_dict(pt.coords),
            "bbox": DetectionContext._bbox_to_dict(pt.bbox),
            "type": pt.type.value,
            "confidence": pt.confidence
        }

    @staticmethod
    def _point_from_dict(d: dict) -> Point:
        return Point(
            id=d["id"],
            coords=DetectionContext._coords_from_dict(d["coords"]),
            bbox=DetectionContext._bbox_from_dict(d["bbox"]),
            type=JunctionType(d["type"]),
            confidence=d.get("confidence", 1.0)
        )

    @staticmethod
    def _line_to_dict(ln: Line) -> dict:
        return {
            "id": ln.id,
            "start": DetectionContext._point_to_dict(ln.start),
            "end": DetectionContext._point_to_dict(ln.end),
            "bbox": DetectionContext._bbox_to_dict(ln.bbox),
            "style": DetectionContext._line_style_to_dict(ln.style),
            "confidence": ln.confidence,
            "topological_links": ln.topological_links
        }

    @staticmethod
    def _line_from_dict(d: dict) -> Line:
        return Line(
            id=d["id"],
            start=DetectionContext._point_from_dict(d["start"]),
            end=DetectionContext._point_from_dict(d["end"]),
            bbox=DetectionContext._bbox_from_dict(d["bbox"]),
            style=DetectionContext._line_style_from_dict(d["style"]),
            confidence=d.get("confidence", 0.90),
            topological_links=d.get("topological_links", [])
        )

    @staticmethod
    def _symbol_to_dict(sym: Symbol) -> dict:
        return {
            "id": sym.id,
            "symbol_type": sym.symbol_type.value,
            "bbox": DetectionContext._bbox_to_dict(sym.bbox),
            "center": DetectionContext._coords_to_dict(sym.center),
            "connections": [DetectionContext._point_to_dict(p) for p in sym.connections],
            "subtype": sym.subtype.value if sym.subtype else None,
            "confidence": sym.confidence,
            "model_metadata": sym.model_metadata
        }

    @staticmethod
    def _symbol_from_dict(d: dict) -> Symbol:
        return Symbol(
            id=d["id"],
            symbol_type=SymbolType(d["symbol_type"]),
            bbox=DetectionContext._bbox_from_dict(d["bbox"]),
            center=DetectionContext._coords_from_dict(d["center"]),
            connections=[DetectionContext._point_from_dict(p) for p in d.get("connections", [])],
            subtype=ValveSubtype(d["subtype"]) if d.get("subtype") else None,
            confidence=d.get("confidence", 0.95),
            model_metadata=d.get("model_metadata", {})
        )

    @staticmethod
    def _junction_props_to_dict(props: JunctionProperties) -> dict:
        return {
            "flow_direction": props.flow_direction,
            "pressure": props.pressure
        }

    @staticmethod
    def _junction_props_from_dict(d: dict) -> JunctionProperties:
        return JunctionProperties(
            flow_direction=d.get("flow_direction"),
            pressure=d.get("pressure")
        )

    @staticmethod
    def _junction_to_dict(jn: Junction) -> dict:
        return {
            "id": jn.id,
            "center": DetectionContext._coords_to_dict(jn.center),
            "junction_type": jn.junction_type.value,
            "properties": DetectionContext._junction_props_to_dict(jn.properties),
            "connected_lines": jn.connected_lines
        }

    @staticmethod
    def _junction_from_dict(d: dict) -> Junction:
        return Junction(
            id=d["id"],
            center=DetectionContext._coords_from_dict(d["center"]),
            junction_type=JunctionType(d["junction_type"]),
            properties=DetectionContext._junction_props_from_dict(d["properties"]),
            connected_lines=d.get("connected_lines", [])
        )

    @staticmethod
    def _tag_to_dict(tg: Tag) -> dict:
        return {
            "id": tg.id,
            "text": tg.text,
            "bbox": DetectionContext._bbox_to_dict(tg.bbox),
            "associated_element": tg.associated_element,
            "font_size": tg.font_size,
            "rotation": tg.rotation
        }

    @staticmethod
    def _tag_from_dict(d: dict) -> Tag:
        return Tag(
            id=d["id"],
            text=d["text"],
            bbox=DetectionContext._bbox_from_dict(d["bbox"]),
            associated_element=d["associated_element"],
            font_size=d.get("font_size", 12),
            rotation=d.get("rotation", 0.0)
        )

    # -------------------------
    # 4) OPTIONAL UTILS
    # -------------------------
    def to_json(self, indent: int = 2) -> str:
        """Convert context to JSON, ensuring dataclasses and numpy types are handled correctly."""
        return json.dumps(self.to_dict(), default=self._json_serializer, indent=indent)

    @staticmethod
    def _json_serializer(obj):
        """Handles numpy types and unknown objects for JSON serialization."""
        if isinstance(obj, np.integer):
            return int(obj)
        if isinstance(obj, np.floating):
            return float(obj)
        if isinstance(obj, np.ndarray):
            return obj.tolist()  # Convert arrays to lists
        if isinstance(obj, Enum):
            return obj.value  # Convert Enums to string values
        if hasattr(obj, "__dict__"):
            return obj.__dict__  # Convert dataclass objects to dict
        raise TypeError(f"Object of type {type(obj)} is not JSON serializable")

    @classmethod
    def from_json(cls, json_str: str) -> "DetectionContext":
        """Load DetectionContext from a JSON string."""
        data = json.loads(json_str)
        return cls.from_dict(data)