from pydantic import BaseModel, field_validator
from typing import Optional, List, Any, Dict
from datetime import datetime


class DeviceBase(BaseModel):
    device_type: str
    label: str = ""
    reference: str = ""
    x: float = 100
    y: float = 100
    width: float = 120
    height: float = 60
    properties: Dict[str, Any] = {}
    pins: List[Dict[str, Any]] = []


class DeviceCreate(DeviceBase):
    diagram_id: int


class DeviceUpdate(BaseModel):
    label: Optional[str] = None
    reference: Optional[str] = None
    x: Optional[float] = None
    y: Optional[float] = None
    width: Optional[float] = None
    height: Optional[float] = None
    properties: Optional[Dict[str, Any]] = None
    pins: Optional[List[Dict[str, Any]]] = None


class Device(DeviceBase):
    id: int
    diagram_id: int

    model_config = {"from_attributes": True}


class WireBase(BaseModel):
    label: str = ""
    from_device_id: Optional[int] = None
    from_pin: str = ""
    to_device_id: Optional[int] = None
    to_pin: str = ""
    color_primary: str = "#FF0000"
    color_stripe: Optional[str] = None
    gauge: str = "18 AWG"
    length: Optional[float] = None
    length_unit: str = "in"
    notes: str = ""
    waypoints: List[Dict[str, Any]] = []
    twisted_pair: bool = False
    twist_pitch: float = 16.0
    shielded: bool = False
    bundle_id: Optional[int] = None
    show_size_label: bool = False

    @field_validator("waypoints", mode="before")
    @classmethod
    def _coerce_waypoints(cls, v):
        return v if v is not None else []


class WireCreate(WireBase):
    diagram_id: int


class WireUpdate(BaseModel):
    label: Optional[str] = None
    from_device_id: Optional[int] = None
    from_pin: Optional[str] = None
    to_device_id: Optional[int] = None
    to_pin: Optional[str] = None
    color_primary: Optional[str] = None
    color_stripe: Optional[str] = None
    gauge: Optional[str] = None
    length: Optional[float] = None
    length_unit: Optional[str] = None
    notes: Optional[str] = None
    waypoints: Optional[List[Dict[str, Any]]] = None
    twisted_pair: Optional[bool] = None
    twist_pitch: Optional[float] = None
    shielded: Optional[bool] = None
    bundle_id: Optional[int] = None
    show_size_label: Optional[bool] = None


class Wire(WireBase):
    id: int
    diagram_id: int

    model_config = {"from_attributes": True}


# ── WireBundle ────────────────────────────────────────────────────────────────

class WireBundleBase(BaseModel):
    label: str = ""
    jacket_color: str = "#2a2a2a"


class WireBundleCreate(WireBundleBase):
    diagram_id: int


class WireBundleUpdate(BaseModel):
    label: Optional[str] = None
    jacket_color: Optional[str] = None


class WireBundleOut(WireBundleBase):
    id: int
    diagram_id: int

    model_config = {"from_attributes": True}


# ── Diagram ───────────────────────────────────────────────────────────────────

class DiagramBase(BaseModel):
    name: str = "Untitled Diagram"
    description: str = ""


class DiagramCreate(DiagramBase):
    pass


class DiagramUpdate(BaseModel):
    name: Optional[str] = None
    description: Optional[str] = None


class DiagramSummary(DiagramBase):
    id: int
    created_at: datetime
    updated_at: datetime

    model_config = {"from_attributes": True}


class DiagramFull(DiagramSummary):
    devices: List[Device] = []
    wires: List[Wire] = []
    wire_bundles: List[WireBundleOut] = []


# ── DiagramView ───────────────────────────────────────────────────────────────

class DiagramViewBase(BaseModel):
    name: str
    route_mode: str = "direct"


class DiagramViewCreate(DiagramViewBase):
    diagram_id: int


class DiagramViewUpdate(BaseModel):
    name: Optional[str] = None
    route_mode: Optional[str] = None


class DiagramViewOut(DiagramViewBase):
    id: int
    diagram_id: int
    created_at: datetime

    model_config = {"from_attributes": True}


class ViewDevicePositionUpdate(BaseModel):
    x: float
    y: float


class ViewWireWaypointsUpdate(BaseModel):
    waypoints: List[Dict[str, Any]] = []


class ViewLayout(BaseModel):
    device_positions: Dict[int, Dict[str, float]] = {}
    wire_waypoints: Dict[int, List[Dict[str, Any]]] = {}


# ── CustomConnector ───────────────────────────────────────────────────────────

class CustomConnectorBase(BaseModel):
    name: str
    manufacturer: str = ""
    part_number: str = ""
    category: str = "Custom"
    description: str = ""
    pin_count: int
    pin_labels: List[str] = []


class CustomConnectorCreate(CustomConnectorBase):
    pass


class CustomConnectorUpdate(BaseModel):
    name: Optional[str] = None
    manufacturer: Optional[str] = None
    part_number: Optional[str] = None
    category: Optional[str] = None
    description: Optional[str] = None
    pin_count: Optional[int] = None
    pin_labels: Optional[List[str]] = None


class CustomConnector(CustomConnectorBase):
    id: int
    created_at: datetime
    updated_at: datetime

    model_config = {"from_attributes": True}