from fastapi import FastAPI
from pydantic import BaseModel
import subprocess
import tempfile
import json
import random

app = FastAPI()
WORLD = {"tick": 0, "agents": []}

class WorldInit(BaseModel):
    agents: int

@app.get("/")
def root():
    return {"status": "BCN Civilization Engine Running"}

@app.post("/world/init")
def init_world(cfg: WorldInit):
    WORLD["tick"] = 0
    WORLD["agents"] = [
        {"id": f"node-{i}", "trust": 100, "credit": 0, "flow": 0}
        for i in range(cfg.agents)
    ]
    return {"status": "world initialized", "agents": cfg.agents}

@app.post("/world/step")
def step_world():
    WORLD["tick"] += 1

    for a in WORLD["agents"]:
        a["trust"] += random.randint(-5, 5)
        a["credit"] = max(0, a["credit"] + random.randint(-3, 3))
        a["flow"] += random.randint(0, 20)

    return {"tick": WORLD["tick"], "agents": WORLD["agents"]}

@app.get("/world/state")
def world_state():
    return WORLD