#!/bin/bash
set -uo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"

PYTHONPATH="$ROOT/lib" python3 - <<'PY'
import tempfile
from pathlib import Path

from classroom_config import ensure_device_config, read_device_config

passed = failed = 0


def check(label, condition, detail=""):
    global passed, failed
    if condition:
        print(f"  ok   {label}")
        passed += 1
    else:
        print(f"  FAIL {label}")
        if detail:
            print(f"       {detail}")
        failed += 1


print("1. the room no longer keeps a list of dock buttons")
check("dock_items is gone with the dock it described",
      not hasattr(__import__("classroom_config"), "dock_items"))
check("and DVD_ENABLED with it, because the machine can be asked",
      "DVD_ENABLED" not in __import__("classroom_config").DEVICE_CONFIG_TEMPLATE)

print("2. fresh device configuration")
with tempfile.TemporaryDirectory() as directory:
    path = Path(directory) / "etc" / "device.conf"
    ensure_device_config(path)
    config = read_device_config(path)
    check("fresh config is created", path.is_file())
    # Every classroom talks to the same broker, so a fresh machine is
    # pointed at it rather than left switched off waiting for somebody to
    # remember. The rooms that were set up before there was a broker are
    # brought to the same place by classroom-migrate.
    check("the broker is on by default", config.get("MQTT_ENABLED") == "true")
    check("and points at the church broker",
          config.get("MQTT_HOST") == "10.40.0.2")
    check("on the usual port", config.get("MQTT_PORT") == "1883")
    check("with no credentials invented for it",
          config.get("MQTT_USERNAME") == "" and config.get("MQTT_PASSWORD") == "")
    check("stable remains the fresh-install default", config.get("CHANNEL") == "stable")

print()
print("3. upgrade from 0.1.36")
old = """# endpoint configuration from 0.1.36
UPDATE_URL=https://updates.example.test
CHANNEL=canary
DVD_ENABLED=true
UI_SCALE=1.25
MQTT_ENABLED=true
MQTT_HOST=broker.example.test
MQTT_PORT=1884
MQTT_USERNAME=room
MQTT_PASSWORD=secret
CUSTOM_SETTING=keep-me
"""

with tempfile.TemporaryDirectory() as directory:
    path = Path(directory) / "device.conf"
    path.write_text(old)

    ensure_device_config(path)
    first = path.read_text()
    config = read_device_config(path)

    check("old bytes remain at the start", first.startswith(old))
    check("channel survives", config.get("CHANNEL") == "canary")
    check("MQTT host survives", config.get("MQTT_HOST") == "broker.example.test")
    check("MQTT password survives", config.get("MQTT_PASSWORD") == "secret")
    check("unknown settings survive", config.get("CUSTOM_SETTING") == "keep-me")
    check("LIVE is appended once", first.count("LIVE_ENABLED=") == 1)

    ensure_device_config(path)
    second = path.read_text()
    check("reinstall makes no further change", second == first)
    check("LIVE still occurs once", second.count("LIVE_ENABLED=") == 1)

print()
print(f"passed: {passed}  failed: {failed}")
raise SystemExit(1 if failed else 0)
PY