"""TeamSpeak Web Explorer configuration.

Settings live in ``config.toml`` (shared with the Node voice gateway in
``gateway/``) and secrets live in ``.env``. Environment variables override the
TOML values, using the same names the gateway reads (see ``ENV_OVERRIDES``).
"""

import os
import tomllib
from pathlib import Path

from dotenv import load_dotenv

BASE_DIR = Path(__file__).resolve().parent
CONFIG_FILE = Path(os.environ.get("TS6_CONFIG_FILE") or BASE_DIR / "config.toml")

load_dotenv(BASE_DIR / ".env")

# (section, key, ENV_VAR, type). Keep in sync with gateway/src/config.js.
ENV_OVERRIDES = [
    ("web", "host", "WEB_HOST", str),
    ("web", "port", "WEB_PORT", int),
    ("web", "dashboard_port", "DASHBOARD_PORT", int),
    ("server", "host", "TS_HOST", str),
    ("server", "webquery_port", "TS_WEBQUERY_PORT", int),
    ("server", "server_id", "TS_SERVER_ID", str),
    ("server", "voice_port", "TS_VOICE_PORT", int),
    ("server", "voice_port", "TS_PORT", int),  # legacy name from the old .env.template
    ("server", "ts_domain", "TS_DOMAIN", str),
    ("voice", "enabled", "VOICE_ENABLED", bool),
    ("voice", "trust_proxy", "VOICE_TRUST_PROXY", bool),
]


def _env_value(raw, kind):
    if kind is bool:
        return raw.strip().lower() in {"1", "true", "yes", "on"}
    return kind(raw.strip())


def _load_toml():
    try:
        with CONFIG_FILE.open("rb") as fh:
            return tomllib.load(fh)
    except FileNotFoundError:
        print(f"[config] {CONFIG_FILE} not found, using defaults")
        return {}


def _build_config():
    raw = _load_toml()
    sections = {
        name: dict(raw.get(name) or {})
        for name in (
            "web", "server", "voice", "ui", "buttons", "external_links", "footer",
            "channel_banners", "channel_icons", "generic_images", "role_icons",
        )
    }

    applied = set()
    for section, key, env_name, kind in ENV_OVERRIDES:
        value = os.environ.get(env_name)
        if value is None or value.strip() == "" or (section, key) in applied:
            continue
        try:
            sections[section][key] = _env_value(value, kind)
            applied.add((section, key))
        except ValueError:
            print(f"[config] ignoring invalid {env_name}={value!r}")

    web = sections["web"]
    web.setdefault("host", "0.0.0.0")
    web.setdefault("port", 5000)
    web.setdefault("dashboard_port", 5001)

    server = sections["server"]
    server.setdefault("host", "")
    server["port"] = server.get("webquery_port", 8443)  # name used by the WebQuery fetcher
    server["server_id"] = str(server.get("server_id", 1))
    server.setdefault("voice_port", 9987)
    server["ts_domain"] = server.get("ts_domain") or server["host"]
    server.setdefault("cache_time", 30)
    server["cache_file"] = BASE_DIR / server.get("cache_file", "cache.json")
    server.setdefault("afk_status_max_clients", 3)
    server["api_key"] = os.environ.get("TS_API_KEY", "")

    voice = sections["voice"]
    voice.setdefault("enabled", True)

    ui = sections["ui"]
    for key, default in {
        "title": "", "subtitle": "", "background_color": "#07111f",
        "panel_color": "#101b2d", "accent_color": "#2589ff", "text_color": "#e8f2ff",
        "banner_url": "", "enable_stars": False,
    }.items():
        ui.setdefault(key, default)

    buttons = sections["buttons"]
    for key, default in {
        "join": "Connect in TeamSpeak", "web_join": "Join from browser",
        "download_text": "Teamspeak is not installed yet?",
        "download_link": "Download Teamspeak",
        "download_url": "https://www.teamspeak.com/en/downloads/",
    }.items():
        buttons.setdefault(key, default)

    footer = sections["footer"]
    for key in ("text", "author", "author_url"):
        footer.setdefault(key, "")

    generic = sections["generic_images"]
    generic.setdefault("background", "")
    generic.setdefault("icon", "")

    sections["role_icons"] = {str(k): v for k, v in sections["role_icons"].items()}
    return sections


CONFIG = _build_config()

# Web voice is only offered when enabled AND a server password is configured:
# the gateway refuses every join without one, so nobody can join without it.
# The password itself is intentionally kept out of CONFIG (which templates see).
VOICE_AVAILABLE = bool(CONFIG["voice"].get("enabled")) and bool(os.environ.get("TS_SERVER_PASSWORD"))