from datetime import datetime
from typing import Any, Literal
from uuid import UUID

from pydantic import BaseModel, EmailStr, Field, field_validator


class RegisterRequest(BaseModel):
    email: EmailStr
    password: str = Field(min_length=8, max_length=128)


class LoginRequest(BaseModel):
    email: EmailStr
    password: str = Field(min_length=1, max_length=128)


class PasswordChangeRequest(BaseModel):
    current_password: str = Field(min_length=1, max_length=128)
    new_password: str = Field(min_length=8, max_length=128)


class UserPublic(BaseModel):
    id: UUID
    email: str | None
    phone: str | None
    role: Literal["user", "admin"]
    plan: Literal["free", "vip"]
    status: Literal["active", "disabled"]
    email_verified: bool
    phone_verified: bool
    created_at: datetime
    last_login_at: datetime | None


class AuthResponse(BaseModel):
    user: UserPublic


class MembershipRequest(BaseModel):
    plan: Literal["free", "vip"]
    starts_at: datetime | None = None
    expires_at: datetime | None = None
    reason: str = Field(min_length=1, max_length=500)


class StatusRequest(BaseModel):
    status: Literal["active", "disabled"]
    reason: str = Field(min_length=1, max_length=500)


class QuotaAdjustmentRequest(BaseModel):
    amount: int
    reason: str = Field(min_length=1, max_length=500)
    idempotency_key: str = Field(min_length=8, max_length=120)


class VerificationConfirmRequest(BaseModel):
    challenge_id: UUID
    code: str = Field(min_length=4, max_length=12)


class VerificationSendRequest(BaseModel):
    channel: Literal["email", "phone"]
    purpose: Literal["registration", "contact_binding", "contact_change", "password_reset"]


def normalize_email(value: str) -> str:
    return value.strip().lower()