from pydantic import BaseModel, ConfigDict, field_validator
from datetime import datetime
from typing import Literal, Optional


class ReminderCreate(BaseModel):
    title: str
    description: Optional[str] = None
    remind_at: Optional[datetime] = None
    is_active: bool = True
    recurrence_rule: Optional[str] = None


class ReminderUpdate(BaseModel):
    title: Optional[str] = None
    description: Optional[str] = None
    remind_at: Optional[datetime] = None
    is_active: Optional[bool] = None
    is_dismissed: Optional[bool] = None
    recurrence_rule: Optional[str] = None


class ReminderSnooze(BaseModel):
    minutes: Literal[5, 10, 15]

    @field_validator('minutes', mode='before')
    @classmethod
    def validate_minutes(cls, v: int) -> int:
        if v not in (5, 10, 15):
            raise ValueError('Snooze duration must be 5, 10, or 15 minutes')
        return v


class ReminderResponse(BaseModel):
    id: int
    title: str
    description: Optional[str]
    remind_at: Optional[datetime]
    is_active: bool
    is_dismissed: bool
    snoozed_until: Optional[datetime] = None
    recurrence_rule: Optional[str]
    created_at: datetime
    updated_at: datetime

    model_config = ConfigDict(from_attributes=True)