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

from datetime import datetime
from pydantic import BaseModel
from typing import Optional
from enum import Enum


class EntryType(str, Enum):
    """Type of wallet entry."""
    INCOME = "income"
    EXPENSE = "expense"


class UserRegister(BaseModel):
    """Schema for user registration."""
    username: str
    email: str
    password: str


class UserLogin(BaseModel):
    """Schema for user login."""
    username: str
    password: str


class UserResponse(BaseModel):
    """Schema for user response."""
    id: int
    username: str
    email: str
    created_at: datetime

    class Config:
        from_attributes = True


class WalletEntryCreate(BaseModel):
    """Schema for creating a wallet entry."""
    amount: float
    entry_type: EntryType
    description: str


class WalletEntryUpdate(BaseModel):
    """Schema for updating a wallet entry."""
    amount: Optional[float] = None
    entry_type: Optional[EntryType] = None
    description: Optional[str] = None


class WalletEntryResponse(BaseModel):
    """Schema for wallet entry response."""
    id: int
    user_id: int
    amount: float
    entry_type: EntryType
    description: str
    created_at: datetime
    updated_at: datetime

    class Config:
        from_attributes = True


class DashboardMetrics(BaseModel):
    """Schema for dashboard metrics."""
    total_balance: float
    total_income: float
    total_expenses: float
    entry_count: int


class TokenResponse(BaseModel):
    """Schema for token response."""
    access_token: str
    token_type: str
    user: UserResponse