## Copyright © 2026 Olaf Kolkman
## SPDX-License-Identifier: GPL-3.0-or-later

import json

from backend.app.database import get_connection


THEMES = {
    'plain-day': {'label': 'Plain Day', 'description': 'A bright, neutral daytime theme.'},
    'plain-night': {'label': 'Plain Night', 'description': 'A neutral dark nighttime theme.'},
    'latte': {'label': 'Catppuccin Latte', 'description': 'Catppuccin light theme.'},
    'frappe': {'label': 'Catppuccin Frappe', 'description': 'Catppuccin soft dark theme.'},
    'macchiato': {'label': 'Catppuccin Macchiato', 'description': 'Catppuccin medium dark theme.'},
    'mocha': {'label': 'Catppuccin Mocha', 'description': 'Catppuccin deep dark theme.'},
    'dracula': {'label': 'Dracula', 'description': 'A vivid dark theme with high-contrast accents.'},
    'nord': {'label': 'Nord', 'description': 'A cool, muted blue-gray theme.'},
    'solarized': {'label': 'Solarized', 'description': 'A balanced theme available in a light style.'},
}
DEFAULT_ENABLED_THEMES = tuple(THEMES)


def get_enabled_themes() -> list[str]:
    with get_connection() as conn:
        row = conn.execute('SELECT value FROM app_settings WHERE name = ?', ('enabled_themes',)).fetchone()
    if row is None:
        return list(DEFAULT_ENABLED_THEMES)
    try:
        configured = json.loads(row['value'])
    except (TypeError, json.JSONDecodeError):
        return list(DEFAULT_ENABLED_THEMES)
    return [theme for theme in configured if theme in THEMES] or ['mocha']


def save_enabled_themes(themes: list[str]) -> list[str]:
    selected = list(dict.fromkeys(theme for theme in themes if theme in THEMES))
    if not selected:
        raise ValueError('At least one theme must be enabled')
    with get_connection() as conn:
        conn.execute(
            '''INSERT INTO app_settings (name, value, updated_at) VALUES (?, ?, CURRENT_TIMESTAMP)
               ON CONFLICT(name) DO UPDATE SET value = excluded.value, updated_at = CURRENT_TIMESTAMP''',
            ('enabled_themes', json.dumps(selected)),
        )
        conn.commit()
    return selected