from fastapi import FastAPI, HTTPException, Form, Body
from fastapi.responses import HTMLResponse
import os, json, uuid
from datetime import datetime
from typing import Optional

DATA = "/data/overlay.json"
app = FastAPI(redirect_slashes=False)

def load():
    if os.path.exists(DATA):
        with open(DATA) as f: return json.load(f)
    return {}

def save(d):
    with open(DATA, "w") as f: json.dump(d, f, indent=2)

@app.get("/api/list")
def list_features():
    items = load()
    return [{"id": k, **v} for k, v in items.items()]

@app.post("/api/add")
def add(payload: dict = Body(...)):
    items = load()
    fid = uuid.uuid4().hex[:12]
    items[fid] = {
        "name": payload.get("name", ""),
        "category": payload.get("category", "general"),
        "color": payload.get("color", "#22d3ee"),
        "notes": payload.get("notes", ""),
        "geometry": payload.get("geometry", {}),  # GeoJSON geometry
        "added": datetime.utcnow().isoformat(),
    }
    save(items)
    return {"id": fid, **items[fid]}

@app.patch("/api/update/{fid}")
def update(fid: str, payload: dict = Body(...)):
    items = load()
    if fid not in items: raise HTTPException(404)
    for k in ["name", "category", "color", "notes", "geometry"]:
        if k in payload: items[fid][k] = payload[k]
    save(items)
    return {"ok": True}

@app.delete("/api/delete/{fid}")
def delete(fid: str):
    items = load()
    if fid not in items: raise HTTPException(404)
    del items[fid]
    save(items)
    return {"ok": True}

@app.get("/", response_class=HTMLResponse)
def root():
    with open("/static/index.html") as f:
        return f.read()