<?php
// Rewrite a *_SCRIPTS array in master.conf with a new script order.
// POST: array_name (e.g. "DAILY_SCRIPTS"), scripts (JSON: [{"id":"rel/path.sh","enabled":true}, ...])
// Preserves original entry lines (including inline flags/args) where possible.
// Scripts absent from the new list are dropped; new scripts are added as fresh entries.
header('Content-Type: application/json');
require_once dirname(__DIR__) . '/include/config.php';

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    echo json_encode(['ok' => false, 'error' => 'POST only']);
    exit;
}

$arrayName = trim($_POST['array_name'] ?? '');
$raw       = $_POST['scripts'] ?? '';
$decoded   = json_decode($raw, true);

if (!$arrayName || !preg_match('/^[A-Z_]+_SCRIPTS$/', $arrayName)) {
    echo json_encode(['ok' => false, 'error' => 'Invalid array_name']);
    exit;
}
if (!is_array($decoded)) {
    echo json_encode(['ok' => false, 'error' => 'Invalid scripts JSON']);
    exit;
}

// Validate each entry
$order = [];
foreach ($decoded as $item) {
    $id      = trim((string)($item['id']      ?? ''));
    $enabled = (bool)($item['enabled'] ?? true);
    if (!$id || str_contains($id, '..') || !preg_match('/^[A-Za-z0-9_.\-\/]+\.sh$/', $id)) continue;
    $order[] = ['id' => $id, 'enabled' => $enabled];
}

$confPath = CONF_DIR . '/master.conf';
if (!file_exists($confPath)) {
    echo json_encode(['ok' => false, 'error' => 'master.conf not found']);
    exit;
}

$lines = file($confPath, FILE_KEEP_BLANK_LINES);
if (!$lines) {
    echo json_encode(['ok' => false, 'error' => 'Could not read master.conf']);
    exit;
}

// Find the array block and extract original entry lines keyed by script path.
$arrayEsc  = preg_quote($arrayName, '/');
$blockStart = null;
$blockEnd   = null;
$depth      = 0;
$origEntries = []; // path → original trimmed content line (e.g. '"Daily/script.sh --flag"')

foreach ($lines as $i => $line) {
    if ($blockStart === null) {
        if (preg_match('/^\s*' . $arrayEsc . '\s*=\s*\(/', $line)) {
            $blockStart = $i;
            $depth = 1;
        }
        continue;
    }
    $depth += substr_count($line, '(');
    $depth -= substr_count($line, ')');
    if ($depth <= 0) {
        $blockEnd = $i;
        break;
    }
    // Collect entries (enabled and commented)
    if (preg_match('/^\s*(?:#\s*)?"([^"]+)"/', $line, $m)) {
        $parts = preg_split('/\s+/', trim($m[1]));
        $path  = $parts[0] ?? '';
        if (substr($path, -3) === '.sh' && !isset($origEntries[$path])) {
            // Store the full quoted expression (may include flags after the path)
            $origEntries[$path] = '"' . $m[1] . '"';
        }
    }
}

if ($blockStart === null || $blockEnd === null) {
    echo json_encode(['ok' => false, 'error' => "Array $arrayName not found in master.conf"]);
    exit;
}

// Build replacement block lines
$newBlockLines = [];
// Preserve the opening line exactly (e.g. "DAILY_SCRIPTS=(")
$newBlockLines[] = $lines[$blockStart];

foreach ($order as $item) {
    $id      = $item['id'];
    $enabled = $item['enabled'];
    $entry   = $origEntries[$id] ?? '"' . $id . '"';
    $prefix  = $enabled ? '  ' : '  # ';
    $newBlockLines[] = $prefix . $entry . "\n";
}

// Preserve the closing line exactly
$newBlockLines[] = $lines[$blockEnd];

// Replace the original block in $lines
array_splice($lines, $blockStart, $blockEnd - $blockStart + 1, $newBlockLines);

if (file_put_contents($confPath, implode('', $lines)) === false) {
    echo json_encode(['ok' => false, 'error' => 'Write failed']);
    exit;
}

echo json_encode(['ok' => true]);