"""Profile switching — port of `crates/jarvis-core/src/profiles.rs`.

Profiles live in `<script_dir>/profiles/<name>.json`. Active profile name
persists in `<script_dir>/active_profile.txt`. Seeds 5 defaults on first run.

Public API:
    active() -> dict          # currently selected profile
    set_active(name) -> dict  # raises ValueError if profile missing
    list_names() -> list[str]
    allows_command(cmd_id) -> bool
"""

import json
import os

_HERE = os.path.dirname(os.path.abspath(__file__))
_PROFILES_DIR = os.path.join(_HERE, 'profiles')
_ACTIVE_FILE = os.path.join(_HERE, 'active_profile.txt')

_active_cache: dict | None = None


def _seed_defaults():
    defaults = [
        {
            'name': 'default',
            'description': 'Обычный режим, все команды доступны.',
            'llm_personality': '',
            'allowed_command_prefixes': [],
            'disabled_command_prefixes': [],
            'greeting': '',
            'icon': '★',
        },
        {
            'name': 'work',
            'description': 'Рабочий режим — фокус, отключены развлечения.',
            'llm_personality': 'Отвечай кратко и по делу. Минимум шуток.',
            'allowed_command_prefixes': [],
            'disabled_command_prefixes': ['games.', 'fun.', 'music.'],
            'greeting': 'Режим работы. Сосредоточимся.',
            'icon': '💼',
        },
        {
            'name': 'game',
            'description': 'Игровой режим — голосовые макросы и игры.',
            'llm_personality': 'Будь дружелюбен. Краткие ответы. Игровая атмосфера.',
            'allowed_command_prefixes': [],
            'disabled_command_prefixes': ['reminders.', 'calendar.'],
            'greeting': 'Игровой режим активирован.',
            'icon': '🎮',
        },
        {
            'name': 'sleep',
            'description': 'Спокойный режим — тихий голос, никаких уведомлений.',
            'llm_personality': 'Говори спокойно, короткими фразами.',
            'allowed_command_prefixes': ['time.', 'weather.', 'lights.'],
            'disabled_command_prefixes': [],
            'greeting': 'Спокойной ночи.',
            'icon': '🌙',
        },
        {
            'name': 'driving',
            'description': 'Режим за рулём — только безопасные команды.',
            'llm_personality': 'Краткие безопасные ответы. Никаких длинных текстов.',
            'allowed_command_prefixes': [
                'music.', 'navigation.', 'calls.',
                'time.', 'weather.', 'reminders.',
            ],
            'disabled_command_prefixes': ['windows.', 'screen.'],
            'greeting': 'Режим за рулём. Веди безопасно.',
            'icon': '🚗',
        },
    ]
    os.makedirs(_PROFILES_DIR, exist_ok=True)
    for p in defaults:
        path = os.path.join(_PROFILES_DIR, f"{p['name']}.json")
        if not os.path.isfile(path):
            try:
                with open(path, 'w', encoding='utf-8') as f:
                    json.dump(p, f, ensure_ascii=False, indent=2)
            except OSError as exc:
                print(f"[profiles] seed {p['name']} failed: {exc}")


def _default_profile() -> dict:
    return {
        'name': 'default',
        'description': 'fallback',
        'llm_personality': '',
        'allowed_command_prefixes': [],
        'disabled_command_prefixes': [],
        'greeting': '',
        'icon': '★',
    }


def _load_profile(name: str) -> dict | None:
    path = os.path.join(_PROFILES_DIR, f'{name}.json')
    if not os.path.isfile(path):
        return None
    try:
        with open(path, encoding='utf-8') as f:
            return json.load(f)
    except (OSError, json.JSONDecodeError) as exc:
        print(f"[profiles] load {name} failed: {exc}")
        return None


def _read_active_name() -> str:
    try:
        with open(_ACTIVE_FILE, encoding='utf-8') as f:
            return f.read().strip() or 'default'
    except OSError:
        return 'default'


def _init():
    global _active_cache
    if _active_cache is not None:
        return
    _seed_defaults()
    name = _read_active_name()
    _active_cache = _load_profile(name) or _default_profile()


def active() -> dict:
    _init()
    return dict(_active_cache or _default_profile())


def active_name() -> str:
    return active().get('name', 'default')


def set_active(name: str) -> dict:
    global _active_cache
    _init()
    profile = _load_profile(name)
    if not profile:
        raise ValueError(f"profile '{name}' not found")
    _active_cache = profile
    try:
        with open(_ACTIVE_FILE, 'w', encoding='utf-8') as f:
            f.write(name)
    except OSError as exc:
        print(f"[profiles] persist failed: {exc}")
    return dict(profile)


def list_names() -> list[str]:
    _init()
    names = []
    if os.path.isdir(_PROFILES_DIR):
        for fname in os.listdir(_PROFILES_DIR):
            if fname.endswith('.json'):
                names.append(fname[:-5])
    return sorted(names)


def allows_command(cmd_id: str) -> bool:
    p = active()
    disabled = p.get('disabled_command_prefixes', []) or []
    if any(cmd_id.startswith(pfx) for pfx in disabled):
        return False
    allowed = p.get('allowed_command_prefixes', []) or []
    if not allowed:
        return True
    return any(cmd_id.startswith(pfx) for pfx in allowed)