"""Everything you might want to change lives here.

Copy the values out of `GET /api/targets` (or the old `/targets`) the
first time you run this, so the names below match exactly what HEOS
reports for your own devices.
"""

import json
import os
from pathlib import Path


def _load_dotenv(path: Path):
    """A `source .env` a shell might forget to `export` is a whole class of
    bug this sidesteps: read the file directly, rather than trusting
    whatever the calling shell's environment happens to contain. Existing
    environment variables still win, so a real export (or systemd's
    EnvironmentFile) overrides the file rather than the other way round."""
    if not path.exists():
        return
    for line in path.read_text().splitlines():
        line = line.strip()
        if not line or line.startswith("#") or "=" not in line:
            continue
        key, _, value = line.partition("=")
        os.environ.setdefault(key.strip(), value.strip())


_load_dotenv(Path(__file__).resolve().parent / ".env")

# --- Rooms, ports & behaviour -------------------------------------------
# None of this is sensitive -- it doesn't give away anything about your
# LAN or credentials -- but it's still yours, not the app's: buying a
# speaker, renaming a room, or changing a port is a config edit, not a
# code change. Lives in config.json rather than here or in .env; copy
# config.json.example to get started.
#
#   heos_name    : the EXACT name HEOS reports for that player -- including
#                  an In-Room Group like a stereo pair, which HEOS pairs at
#                  the hardware level into one player, one pid, always.
#   spotify_name    : only needed if a room's Spotify Connect name differs
#                     from heos_name -- GET /api/spotify/devices?account=account1 shows what
#                     Spotify actually calls it. Defaults to heos_name.
#   in_room_group   : what heos_name actually names, when it is not a single
#                     speaker -- one of IN_ROOM_GROUPS below. HEOS merges any
#                     of these into one player, one pid, at the hardware
#                     level, the same way it does a Stereo Pair -- so, same
#                     as heos_name itself, this can only be set by hand, not
#                     read back from HEOS. Defaults to "none".
IN_ROOM_GROUPS = ("none", "stereo-pair", "lcr-fronts", "surround-sound-system", "subwoofer")

_config_path = Path(__file__).resolve().parent / "config.json"
try:
    _cfg = json.loads(_config_path.read_text())
except FileNotFoundError:
    raise SystemExit(
        f"{_config_path} not found -- copy config.json.example to config.json "
        "and fill in your own rooms (see the README's Configure section)."
    )

TARGETS = _cfg["targets"]

for _key, _target in TARGETS.items():
    _group = _target.get("in_room_group", "none")
    if _group not in IN_ROOM_GROUPS:
        raise SystemExit(
            f"{_config_path}: '{_key}' has in_room_group '{_group}', not one "
            f"of {', '.join(IN_ROOM_GROUPS)}"
        )

# The AVR is always the group host: its content takes over every room
# that joins, which is the whole point of the merge buttons.
HOST_KEY = _cfg["host_key"]

# The rooms that get a card with volume + a join/leave button, in order.
ROOM_KEYS = _cfg["room_keys"]

# The grid the volume buttons snap to. A tap moves to the next multiple of
# this rather than adding it, so at 5 a level of 23 goes to 25, not 28.
VOLUME_STEP = _cfg["volume_step"]

# Port the panel itself listens on.
WEB_PORT = _cfg["web_port"]

# --- Network ----------------------------------------------------------
# Any ONE HEOS device's IP is enough: HEOS is a distributed system, so
# whichever unit you connect to can see and control every player and
# group on the network. A LAN address isn't a credential, so it lives
# here rather than in .env -- just don't publish this file if your LAN
# is reachable from outside it.
HEOS_HOST = _cfg["heos_host"]
HEOS_PORT = _cfg["heos_port"]

# --- Zidoo (optional) ---------------------------------------------------
# A Zidoo media player plugged into one of the AVR's inputs. HEOS only
# knows that input is selected, not what the Zidoo is actually showing, so
# its "now playing" comes from the Zidoo's own HTTP API instead -- queried
# only while ZIDOO_INPUT_CODE is the AVR's selected input. Leave
# zidoo_host out of config.json if there is no Zidoo to ask.
ZIDOO_HOST = _cfg.get("zidoo_host")
ZIDOO_PORT = _cfg["zidoo_port"]
ZIDOO_INPUT_CODE = "inputs/mediaplayer"    # see GET /api/avr/inputs

# Shown as the app's name on the iOS home screen.
APP_NAME = "Heos"

# --- Spotify (optional) -------------------------------------------------
# One Spotify button per account on each speaker's card (not the AVR's),
# resuming that account's playback there -- see the README's Spotify section and
# tools/spotify_auth.py. Credentials come from .env, never from here, so
# they stay out of git. One developer app serves every account; only the
# refresh token differs, since that is what each account's login produces.
SPOTIFY_CLIENT_ID = os.environ.get("SPOTIFY_CLIENT_ID")
SPOTIFY_CLIENT_SECRET = os.environ.get("SPOTIFY_CLIENT_SECRET")

# key -> button label and that account's refresh token, in button order.
# An account without a token gets no button. The label comes from
# spotify_accounts in config.json -- e.g. "account1": "Fifou".
_spotify_names = _cfg.get("spotify_accounts", {})
SPOTIFY_ACCOUNTS = {
    "account1": {"label": _spotify_names.get("account1", "Account 1"), "refresh_token": os.environ.get("SPOTIFY_ACCOUNT1_REFRESH_TOKEN")},
    "account2": {"label": _spotify_names.get("account2", "Account 2"), "refresh_token": os.environ.get("SPOTIFY_ACCOUNT2_REFRESH_TOKEN")},
}