from pydantic import BaseModel, Field, constr
from typing import Optional
from datetime import datetime
from passlib.context import CryptContext

pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")

# Constants for phone and MAC address patterns
PHONE_PATTERN = r"^(?:\+255|0)\d{9}$"
MAC_PATTERN = r"^([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})$"


# Register User Request
class RegisterUserRequest(BaseModel):
    name: str = Field(..., max_length=100)
    password: str = Field(..., max_length=100)
    phoneNumber: str = Field(
        ...,
        pattern=PHONE_PATTERN,
        description="Tanzanian phone number starting with +255 or 0 followed by 9 digits",
    )
    mac_address: str = Field(
        ..., pattern=MAC_PATTERN, description="MAC address in standard format"
    )

    def hash_password(self):
        self.password = pwd_context.hash(self.password)

    class Config:
        schema_extra = {
            "example": {
                "name": "John Doe",
                "password": "StrongPassword1!",
                "phoneNumber": "+255123456789",
                "mac_address": "00:1A:2B:3C:4D:5E",
            }
        }


# Login User Request
class LoginUserRequest(BaseModel):
    phoneNumber: str = Field(..., pattern=PHONE_PATTERN)
    password: str
    mac_address: str = Field(..., pattern=MAC_PATTERN)


# Access Token Response
class AccessTokenResponse(BaseModel):
    access_token: str
    token_type: str = "bearer"


# Base Response Schema
class BaseResponse(BaseModel):
    code: int
    message: str
    payload: Optional[dict] = None


# Forgot Password Request
class ForgotPasswordRequest(BaseModel):
    phoneNumber: str = Field(..., pattern=PHONE_PATTERN)


# Verify Reset Token Request
class VerifyResetTokenRequest(BaseModel):
    phoneNumber: str = Field(..., pattern=PHONE_PATTERN)
    reset_token: str = Field(..., max_length=6)


# Reset Password Request
class ResetPasswordRequest(BaseModel):
    phoneNumber: str = Field(..., pattern=PHONE_PATTERN)
    new_password: str = Field(..., max_length=100)