import uuid
from fastapi import APIRouter, HTTPException
from app.models import SystemCreate, SystemRecord
from app.internal import firestore as fstore

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


@router.get("")
async def list_systems():
    return await fstore.collection_list("systems")


@router.get("/{system_id}")
async def get_system(system_id: str):
    system = await fstore.doc_get("systems", system_id)
    if not system:
        raise HTTPException(404, f"System '{system_id}' not found.")
    return system


@router.post("", status_code=201)
async def create_system(body: SystemCreate):
    system_id = str(uuid.uuid4())
    doc = SystemRecord(system_id=system_id, **body.model_dump())
    await fstore.doc_set("systems", system_id, doc.model_dump(), merge=False)
    return doc


@router.put("/{system_id}")
async def update_system(system_id: str, body: SystemCreate):
    existing = await fstore.doc_get("systems", system_id)
    if not existing:
        raise HTTPException(404, f"System '{system_id}' not found.")
    await fstore.doc_update("systems", system_id, body.model_dump())
    return {**existing, **body.model_dump()}


@router.delete("/{system_id}", status_code=204)
async def delete_system(system_id: str):
    existing = await fstore.doc_get("systems", system_id)
    if not existing:
        raise HTTPException(404, f"System '{system_id}' not found.")
    await fstore.doc_delete("systems", system_id)