"""
Superadmin endpoints for user management.
"""

from typing import Annotated

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

from app.api.deps import get_current_superadmin
from app.core.database import get_db
from app.models.user import User
from app.schemas.user import UserCreate, UserListResponse, UserResponse, UserUpdate
from app.services import user_service

router = APIRouter()


class ChangePasswordRequest(BaseModel):
    """Request schema for changing user password."""

    new_password: str


@router.get("", response_model=UserListResponse)
async def list_users(
    db: Annotated[AsyncSession, Depends(get_db)],
    current_user: Annotated[User, Depends(get_current_superadmin)],
    skip: int = Query(0, ge=0, description="Number of records to skip"),
    limit: int = Query(100, ge=1, le=1000, description="Max records to return"),
    organization_id: int | None = Query(None, description="Filter by organization"),
    role: str | None = Query(None, description="Filter by role"),
    status: str | None = Query(None, description="Filter by status"),
):
    """
    List all users (superadmin only).

    Returns paginated list of users with optional filters.
    """
    users, total = await user_service.list_users(
        db,
        skip=skip,
        limit=limit,
        organization_id=organization_id,
        role=role,
        status=status,
    )

    return UserListResponse(
        users=users,
        total=total,
    )


@router.get("/{user_id}", response_model=UserResponse)
async def get_user(
    user_id: int,
    db: Annotated[AsyncSession, Depends(get_db)],
    current_user: Annotated[User, Depends(get_current_superadmin)],
):
    """
    Get user by ID (superadmin only).
    """
    user = await user_service.get_user(db, user_id)

    if not user:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="User not found",
        )

    return user


@router.post("", response_model=UserResponse, status_code=status.HTTP_201_CREATED)
async def create_user(
    data: UserCreate,
    db: Annotated[AsyncSession, Depends(get_db)],
    current_user: Annotated[User, Depends(get_current_superadmin)],
):
    """
    Create a new user (superadmin only).

    Creates an active user with email verified.
    """
    # Check if email already exists
    existing_user = await user_service.get_user_by_email(db, data.email)
    if existing_user:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Email already registered",
        )

    user = await user_service.create_user(db, data)

    return user


@router.patch("/{user_id}", response_model=UserResponse)
async def update_user(
    user_id: int,
    data: UserUpdate,
    db: Annotated[AsyncSession, Depends(get_db)],
    current_user: Annotated[User, Depends(get_current_superadmin)],
):
    """
    Update user (superadmin only).

    Can update user details, role, and status.
    """
    user = await user_service.update_user(db, user_id, data)

    if not user:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="User not found",
        )

    return user


@router.delete("/{user_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_user(
    user_id: int,
    db: Annotated[AsyncSession, Depends(get_db)],
    current_user: Annotated[User, Depends(get_current_superadmin)],
):
    """
    Delete user (superadmin only).

    Warning: This permanently deletes the user.
    """
    # Prevent deleting yourself
    if user_id == current_user.id:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail="Cannot delete yourself",
        )

    deleted = await user_service.delete_user(db, user_id)

    if not deleted:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="User not found",
        )


@router.post("/{user_id}/change-password", response_model=UserResponse)
async def change_user_password(
    user_id: int,
    data: ChangePasswordRequest,
    db: Annotated[AsyncSession, Depends(get_db)],
    current_user: Annotated[User, Depends(get_current_superadmin)],
):
    """
    Change user password (superadmin only).

    Allows superadmin to reset any user's password.
    """
    user = await user_service.change_user_password(db, user_id, data.new_password)

    if not user:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail="User not found",
        )

    return user