from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy.ext.asyncio import AsyncSession
from app.database import get_db
from app.services.admin import AdminService
from app.api.v1.deps import get_current_user

router = APIRouter()


async def require_admin(current_user: dict = Depends(get_current_user)) -> dict:
    if current_user.get("role") != "admin":
        raise HTTPException(status_code=403, detail="Admin access required")
    return current_user


@router.get("/dashboard")
async def get_dashboard(
    _: dict = Depends(require_admin),
    db: AsyncSession = Depends(get_db),
):
    service = AdminService(db)
    return await service.get_dashboard()


@router.get("/users")
async def list_users(
    page: int = Query(1, ge=1),
    size: int = Query(20, ge=1, le=100),
    _: dict = Depends(require_admin),
    db: AsyncSession = Depends(get_db),
):
    service = AdminService(db)
    return await service.list_users(page, size)


@router.patch("/users/{target_user_id}/tier")
async def update_user_tier(
    target_user_id: str,
    data: dict,
    _: dict = Depends(require_admin),
    db: AsyncSession = Depends(get_db),
):
    service = AdminService(db)
    tier = data.get("tier")
    if tier not in ("free", "pro", "enterprise"):
        raise HTTPException(status_code=400, detail="Invalid tier")
    success = await service.update_user_tier(target_user_id, tier)
    if not success:
        raise HTTPException(status_code=404, detail="User not found")
    return {"message": f"User tier updated to {tier}"}


@router.post("/users/{target_user_id}/toggle-active")
async def toggle_user_active(
    target_user_id: str,
    _: dict = Depends(require_admin),
    db: AsyncSession = Depends(get_db),
):
    service = AdminService(db)
    success = await service.toggle_user_active(target_user_id)
    if not success:
        raise HTTPException(status_code=404, detail="User not found")
    return {"message": "User active status toggled"}


@router.get("/health")
async def system_health(
    db: AsyncSession = Depends(get_db),
):
    service = AdminService(db)
    return await service.get_system_health()