<?php
declare(strict_types=1);

function app_default_config(): array
{
    return [
        'app' => [
            'title' => 'Wall Panel',
            'poll_interval_ms' => 5000,
            'main_room_name' => 'Главная',
            'main_room_icon' => 'mdi:home',
            'edit_mode' => false,
            'battery_history_hours' => 4320,
        ],
        'home_assistant' => [
            'base_url' => '',
            'token' => '',
            'verify_ssl' => true,
            'weather_entity_id' => '',
            'auto_label' => 'auto',
            'auto_entity_ids' => [],
        ],
        'camera' => [
            'rtsp_url' => 'rtsp://10.0.6.110:45321/feff99fa45f317e7',
            'stream_url' => '',
            'stream_mode' => 'hls',
            'poster_url' => 'http://10.0.6.110:5000/api/doorbell/latest.jpg',
            'popup_timeout_minutes' => 3,
            'trigger_entities' => [
                'binary_sensor.door_all_occupancy',
                'binary_sensor.barn_all_occupancy',
                'binary_sensor.doorbell_all_occupancy',
            ],
        ],
        'rooms' => [],
    ];
}

function app_config_path(): string
{
    return APP_ROOT . '/config/config.json';
}

function app_storage_path(string $file): string
{
    return APP_ROOT . '/storage/' . ltrim($file, '/');
}

function app_ensure_directory(string $path): void
{
    if (!is_dir($path)) {
        mkdir($path, 0775, true);
    }
}

function app_load_config(): array
{
    $path = app_config_path();
    app_ensure_directory(dirname($path));

    if (!file_exists($path)) {
        $defaults = app_default_config();
        file_put_contents($path, json_encode($defaults, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES));
        return $defaults;
    }

    $raw = file_get_contents($path);
    if ($raw === false || trim($raw) === '') {
        return app_default_config();
    }

    $decoded = json_decode($raw, true);
    if (!is_array($decoded)) {
        throw new RuntimeException('Invalid JSON in config/config.json');
    }

    return array_replace_recursive(app_default_config(), $decoded);
}

function app_save_config(array $config): void
{
    $path = app_config_path();
    app_ensure_directory(dirname($path));

    $json = json_encode($config, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
    if ($json === false) {
        throw new RuntimeException('Failed to encode config');
    }

    file_put_contents($path, $json . PHP_EOL, LOCK_EX);
}

function app_load_json_file(string $path, array $fallback = []): array
{
    if (!file_exists($path)) {
        return $fallback;
    }

    $raw = file_get_contents($path);
    if ($raw === false || trim($raw) === '') {
        return $fallback;
    }

    $decoded = json_decode($raw, true);
    return is_array($decoded) ? $decoded : $fallback;
}

function app_save_json_file(string $path, array $data): void
{
    app_ensure_directory(dirname($path));
    $json = json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
    if ($json === false) {
        throw new RuntimeException('Failed to encode JSON');
    }

    file_put_contents($path, $json . PHP_EOL, LOCK_EX);
}