"""Pydantic schemas for Station and StationRecipeAssignment."""
from src.backend.models.api.tipi import UtcDateTime
from typing import Optional

from pydantic import BaseModel, ConfigDict, Field, field_validator


def _normalize_http_url(value: Optional[str], field: str) -> Optional[str]:
    """Vuoto/spazi -> None; altrimenti http(s) senza '/' finale."""
    if value is None:
        return None
    value = value.strip()
    if not value:
        return None
    if not value.lower().startswith(("http://", "https://")):
        raise ValueError(f"{field} must start with http:// or https://")
    return value.rstrip("/")


def _normalize_worker_url(value: Optional[str]) -> Optional[str]:
    """Vuoto/spazi -> None (worker centrale); altrimenti http(s) senza '/' finale (#45)."""
    return _normalize_http_url(value, "vision_worker_url")


def _normalize_camera_url(value: Optional[str]) -> Optional[str]:
    """Vuoto/spazi -> None (nessuna camera); altrimenti http(s) senza '/' finale (#72)."""
    return _normalize_http_url(value, "camera_url")


def _normalize_camera_source(value: Optional[str]) -> Optional[str]:
    """Strip; vuoto -> None (#72)."""
    if value is None:
        return None
    return value.strip() or None


class StationCreate(BaseModel):
    code: str = Field(..., min_length=1, max_length=100)
    name: str = Field(..., min_length=1, max_length=255)
    location: Optional[str] = Field(default=None, max_length=255)
    notes: Optional[str] = None
    active: bool = True
    # worker di visione della stazione (#45); vuoto = centrale
    vision_worker_url: Optional[str] = Field(default=None, max_length=500)
    # camera della stazione (#72); vuoto = nessuna camera
    camera_url: Optional[str] = Field(default=None, max_length=500)
    camera_source: Optional[str] = Field(default=None, max_length=200)

    _check_worker_url = field_validator("vision_worker_url")(_normalize_worker_url)
    _check_camera_url = field_validator("camera_url")(_normalize_camera_url)
    _check_camera_source = field_validator("camera_source")(_normalize_camera_source)


class StationUpdate(BaseModel):
    name: Optional[str] = Field(default=None, min_length=1, max_length=255)
    location: Optional[str] = Field(default=None, max_length=255)
    notes: Optional[str] = None
    active: Optional[bool] = None
    # worker di visione della stazione (#45); "" -> None riporta al centrale
    vision_worker_url: Optional[str] = Field(default=None, max_length=500)
    # camera della stazione (#72); vuoto = nessuna camera
    camera_url: Optional[str] = Field(default=None, max_length=500)
    camera_source: Optional[str] = Field(default=None, max_length=200)

    _check_worker_url = field_validator("vision_worker_url")(_normalize_worker_url)
    _check_camera_url = field_validator("camera_url")(_normalize_camera_url)
    _check_camera_source = field_validator("camera_source")(_normalize_camera_source)


class StationResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: int
    code: str
    name: str
    location: Optional[str]
    notes: Optional[str]
    active: bool
    vision_worker_url: Optional[str] = None  # #45
    camera_url: Optional[str] = None  # #72
    camera_source: Optional[str] = None  # #72
    created_by: int
    created_at: UtcDateTime


class StationRecipeAssignmentCreate(BaseModel):
    recipe_id: int = Field(..., gt=0)


class StationRecipeAssignmentResponse(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: int
    station_id: int
    recipe_id: int
    assigned_by: int
    assigned_at: UtcDateTime


class RecipeSummary(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: int
    code: str
    name: str
    active: bool
    image_path: Optional[str] = None
    description: Optional[str] = None
    # The selection screen has to know before the operator starts: what a recipe
    # demands is the difference between an enabled Avvia and a disabled one.
    requires_lot: bool = False
    requires_serial: bool = False


class StationWithRecipesResponse(StationResponse):
    recipes: list[RecipeSummary] = Field(default_factory=list)


class StationResetResponse(BaseModel):
    """Outcome of clearing every recipe assignment of a station."""

    station_id: int
    removed: int