<?php
// Config file parser and writer.
// Reads master.conf and the appropriate host*.conf based on running host.

define('PLUGIN_CFG',  '/boot/config/plugins/varaverk/varaverk.cfg');

$_vv_cfg = @parse_ini_file(PLUGIN_CFG) ?: [];
define('SCRIPTS_DIR', $_vv_cfg['SCRIPTS_DIR'] ?? '/mnt/user/appdata/unraid_scripts');
define('CONF_DIR',    SCRIPTS_DIR . '/Configurations');
define('LOG_DIR',     '/var/log/varaverk');
unset($_vv_cfg);

function vv_get_hostname(): string {
    return trim(shell_exec('hostname -s') ?: '');
}

// Mirror of common.sh resolve_tailscale_ip(): tries `tailscale ip -4` first (Tailscale manages
// the mapping so this survives IP changes), falls back to parsing `tailscale status` text.
function vv_resolve_tailscale_ip(string $hostname): string {
    $h  = strtolower($hostname);
    $ip = trim(shell_exec('tailscale ip -4 ' . escapeshellarg($h) . ' 2>/dev/null') ?: '');
    if ($ip) return $ip;
    $out = shell_exec('tailscale status 2>/dev/null') ?: '';
    foreach (explode("\n", $out) as $line) {
        $cols = preg_split('/\s+/', trim($line));
        if (isset($cols[1]) && stripos($cols[1], $h . '.') === 0) return $cols[0];
    }
    return '';
}

function vv_detect_host(): string {
    // Reads master.conf for HOST1="name" (or HOST1_NAME="name") and matches running hostname.
    // Returns 'host1', 'host2', 'host3', ... or 'unknown'. Works for any number of hosts.
    $master = vv_read_conf_raw('master.conf');
    preg_match_all('/^\s*(HOST\d+)(?:_NAME)?\s*=\s*["\']?(\S+?)["\']?\s*$/m', $master, $m);
    $hostname = vv_get_hostname();
    foreach ($m[1] as $i => $key) {
        if (strcasecmp($hostname, trim($m[2][$i])) === 0) return strtolower($key);
    }
    return 'unknown';
}

function vv_is_owner(): bool {
    return vv_detect_host() === 'host1';
}

function vv_read_conf_raw(string $filename): string {
    $path = CONF_DIR . '/' . $filename;
    return file_exists($path) ? file_get_contents($path) : '';
}

function vv_write_conf_raw(string $filename, string $content): bool {
    $path = CONF_DIR . '/' . $filename;
    return file_put_contents($path, $content) !== false;
}

function vv_get_conf_files(): array {
    // Returns conf files this host is allowed to view/edit
    $host = vv_detect_host();
    $files = [];
    if ($host === 'host1') {
        // Owner sees master.conf + their own host conf
        $files[] = 'master.conf';
        $files[] = 'host1.conf';
    } elseif (preg_match('/^host(\d+)$/', $host)) {
        // Any other numbered host sees only their own conf
        $files[] = $host . '.conf';
    } else {
        // Unknown host — show all for dev/debug
        foreach (glob(CONF_DIR . '/*.conf') as $f) {
            $files[] = basename($f);
        }
    }
    return $files;
}

// Parse conf into key=>value map for $VAR substitution in docs
function vv_conf_vars(): array {
    $vars = [];
    $files = ['master.conf'];
    $host  = vv_detect_host();
    if (preg_match('/^host\d+$/', $host)) $files[] = $host . '.conf';

    foreach ($files as $f) {
        $raw = vv_read_conf_raw($f);
        // Match: VAR_NAME="value" or VAR_NAME=value (no quotes)
        preg_match_all('/^\s*([A-Z0-9_]+)\s*=\s*["\']?([^"\'#\n]*?)["\']?\s*(?:#.*)?$/m', $raw, $m);
        foreach ($m[1] as $i => $key) {
            $vars[$key] = trim($m[2][$i]);
        }
    }
    return $vars;
}