"""Minimal Viable Pathway calculate example.

Set VIABLE_API_KEY in your environment — never commit the key.
"""

import json
import os
import urllib.request

API_KEY = os.environ["VIABLE_API_KEY"]
BASE = "https://app.viablepathway.net"
URL = f"{BASE}/api/calculate?savePayload=false"

with open("minimal-payload.json", encoding="utf-8") as f:
    payload = json.load(f)

req = urllib.request.Request(
    URL,
    data=json.dumps(payload).encode("utf-8"),
    headers={
        "Content-Type": "application/json",
        "Authorization": f"ApiKey {API_KEY}",
    },
    method="POST",
)

with urllib.request.urlopen(req) as resp:
    result = json.load(resp)

print("projectionyears:", result.get("projectionyears"))
print("BAU pathway (tCO2e):", result.get("ghgBAUsumperyear"))
print("EXT pathway (tCO2e):", result.get("ghgEXTsumperyear"))
print("INT pathway (tCO2e):", result.get("ghgINTsumperyear"))