"""Board Pydantic schemas for request/response validation."""

from datetime import datetime
from uuid import UUID

from pydantic import BaseModel, ConfigDict, Field, field_validator


class ViewportState(BaseModel):
    """Viewport state for canvas position and zoom."""

    x: float = Field(default=0, description="Horizontal pan position")
    y: float = Field(default=0, description="Vertical pan position")
    zoom: float = Field(default=1.0, ge=0.1, le=5.0, description="Zoom level (0.1 to 5.0)")
    rotation: float = Field(default=0, ge=0, le=360, description="Canvas rotation in degrees (0 to 360)")


class BoardCreate(BaseModel):
    """Schema for creating a new board."""

    title: str = Field(..., min_length=1, max_length=255, description="Board title")
    description: str | None = Field(default=None, description="Optional board description")


class ViewportStateUpdate(BaseModel):
    """Schema for updating viewport state only."""

    x: float = Field(..., description="Horizontal pan position")
    y: float = Field(..., description="Vertical pan position")
    zoom: float = Field(..., ge=0.1, le=5.0, description="Zoom level (0.1 to 5.0)")
    rotation: float = Field(..., ge=0, le=360, description="Canvas rotation in degrees (0 to 360)")


class BoardUpdate(BaseModel):
    """Schema for updating board metadata."""

    title: str | None = Field(None, min_length=1, max_length=255, description="Board title")
    description: str | None = Field(None, description="Board description")
    viewport_state: ViewportState | None = Field(None, description="Viewport state")


class BoardSummary(BaseModel):
    """Summary schema for board list view."""

    model_config = ConfigDict(from_attributes=True)

    id: UUID
    title: str
    description: str | None = None
    image_count: int = Field(default=0, description="Number of images on board")
    thumbnail_url: str | None = Field(default=None, description="URL to board thumbnail")
    created_at: datetime
    updated_at: datetime


class BoardDetail(BaseModel):
    """Detailed schema for single board view with all data."""

    model_config = ConfigDict(from_attributes=True)

    id: UUID
    user_id: UUID
    title: str
    description: str | None = None
    viewport_state: ViewportState
    created_at: datetime
    updated_at: datetime
    is_deleted: bool = False

    @field_validator("viewport_state", mode="before")
    @classmethod
    def convert_viewport_state(cls, v):
        """Convert dict to ViewportState if needed."""
        if isinstance(v, dict):
            return ViewportState(**v)
        return v