from __future__ import annotations

from urllib.parse import quote

from pydantic import BaseModel, ConfigDict, field_validator


def encode_path(path: str) -> str:
    if not path:
        return ""
    return "/".join(quote(part, safe="") for part in path.split("/"))


class PhotoItem(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    
    id: int
    path: str
    filename: str
    category_id: int

    @field_validator("path", mode="before")
    @classmethod
    def encode_urls(cls, v):
        return encode_path(v)

    @field_validator("path", mode="after")
    @classmethod
    def add_media(cls, v: str) -> str:
        if not v: return v
        clean_v = v.lstrip('/')
        if clean_v.startswith('media/'): return f"{clean_v}"
        return f"media/{clean_v}"


class Category(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    
    id: int
    title: str
    photos: list[PhotoItem] = []


class PhotosOut(BaseModel):
    photos: list[PhotoItem]

class CategoryItem(BaseModel):
    id: int
    title: str
    photos_count: int

class CategoriesOut(BaseModel):
    categories: list[CategoryItem]

class PhotosPaginatedOut(BaseModel):
    photos: list[PhotoItem]
    page_inc: str
    page_dec: str