from datetime import datetime
from uuid import UUID

from pydantic import BaseModel, ConfigDict, Field


class InitializeRequest(BaseModel):
    username: str = Field(min_length=3, max_length=64, pattern=r"^[A-Za-z0-9_.-]+$")
    password: str = Field(min_length=12, max_length=256)


class LoginRequest(BaseModel):
    username: str
    password: str


class UserOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: UUID
    username: str


class FolderCreate(BaseModel):
    name: str = Field(min_length=1, max_length=120)


class FolderOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: UUID
    name: str


class ListCreate(BaseModel):
    name: str = Field(min_length=1, max_length=120)
    folder_id: UUID | None = None


class ListOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: UUID
    folder_id: UUID | None
    name: str
    is_inbox: bool


class TaskCreate(BaseModel):
    title: str = Field(min_length=1, max_length=500)
    list_id: UUID
    description: str = ""
    priority: int = Field(default=0, ge=0, le=3)
    due_at: datetime | None = None
    parent_id: UUID | None = None


class TaskUpdate(BaseModel):
    title: str = Field(default=None, min_length=1, max_length=500)
    description: str = Field(default=None)
    priority: int | None = Field(default=None, ge=0, le=3)
    due_at: datetime | None = None
    completed: bool | None = None
    version: int = Field(ge=1)


class TaskOut(BaseModel):
    model_config = ConfigDict(from_attributes=True)
    id: UUID
    list_id: UUID
    parent_id: UUID | None
    title: str
    description: str
    priority: int
    completed: bool
    due_at: datetime | None
    version: int


class TaskPage(BaseModel):
    items: list[TaskOut]
    next_cursor: str | None = None