"""Auth routes: register, login, refresh, me, update, delete."""

from uuid import UUID

from fastapi import APIRouter, Depends, HTTPException, status
from pydantic import BaseModel
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from cartsnitch_api.auth.dependencies import get_current_user
from cartsnitch_api.database import get_db
from cartsnitch_api.models import User
from cartsnitch_api.schemas import (
    LoginRequest,
    RefreshRequest,
    RegisterRequest,
    TokenResponse,
    UpdateUserRequest,
    UserResponse,
)
from cartsnitch_api.services.auth import AuthService

router = APIRouter(prefix="/auth", tags=["auth"])


@router.post("/register", response_model=TokenResponse, status_code=status.HTTP_201_CREATED)
async def register(body: RegisterRequest, db: AsyncSession = Depends(get_db)):
    svc = AuthService(db)
    try:
        return await svc.register(body.email, body.password, body.display_name)
    except ValueError as e:
        raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail=str(e)) from e


@router.post("/login", response_model=TokenResponse)
async def login(body: LoginRequest, db: AsyncSession = Depends(get_db)):
    svc = AuthService(db)
    try:
        return await svc.login(body.email, body.password)
    except ValueError:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid email or password"
        ) from None


@router.post("/refresh", response_model=TokenResponse)
async def refresh(body: RefreshRequest, db: AsyncSession = Depends(get_db)):
    svc = AuthService(db)
    try:
        return await svc.refresh(body.refresh_token)
    except ValueError:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid refresh token"
        ) from None


@router.get("/me", response_model=UserResponse)
async def get_me(
    user_id: UUID = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    svc = AuthService(db)
    try:
        return await svc.get_user(user_id)
    except LookupError:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND, detail="User not found"
        ) from None


@router.patch("/me", response_model=UserResponse)
async def update_me(
    body: UpdateUserRequest,
    user_id: UUID = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    svc = AuthService(db)
    try:
        return await svc.update_user(user_id, email=body.email, display_name=body.display_name)
    except LookupError:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND, detail="User not found"
        ) from None
    except ValueError as e:
        raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail=str(e)) from e


@router.delete("/me", status_code=status.HTTP_204_NO_CONTENT)
async def delete_me(
    user_id: UUID = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    svc = AuthService(db)
    try:
        await svc.delete_user(user_id)
    except LookupError:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND, detail="User not found"
        ) from None


class EmailInAddressResponse(BaseModel):
    email_address: str
    instructions: str


@router.get("/me/email-in-address", response_model=EmailInAddressResponse)
async def get_email_in_address(
    user_id: UUID = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
):
    result = await db.execute(select(User.email_inbound_token).where(User.id == user_id))
    token = result.scalar_one_or_none()
    if not token:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND, detail="Email inbound token not found"
        ) from None
    return EmailInAddressResponse(
        email_address=f"receipts+{token}@receipts.cartsnitch.com",
        instructions=(
            "Forward your digital receipt emails to this address. "
            "We currently support Meijer, Kroger, and Target receipt emails."
        ),
    )