<?php
defined($security_key) or exit;

//------------------------------------------
// Software Versions for Upgrades
//------------------------------------------

//Connect to DB
$pdo = dbConnect($dbname);

//SoldTo is empty
if (empty($partner->soldto) || $partner->soldto == ''){$soldto_search = '%';} else {$soldto_search = '-%';}

//default whereclause
$whereclause = '';

//NEW ARRAY
$criterias = [];
$clause = '';

//Check for $_GET variables and build up clause
if(isset($get_content) && $get_content!=''){
    //GET VARIABLES FROM URL
    $requests = explode("&", $get_content);
    //Check for keys and values
    foreach ($requests as $y){
        $v = explode("=", $y);
        //INCLUDE VARIABLES IN ARRAY
        $criterias[$v[0]] = $v[1];

        if ($v[0] == 'page' || $v[0] =='p' || $v[0] =='totals' || $v[0] =='list' || $v[0] =='history'|| $v[0] =='success_msg'){
        //do nothing
        }
        elseif ($v[0] == 'available') {
            // Special case: get available upgrades for current user
            // This will be handled separately below
        }
        elseif ($v[0] == 'version_id') {
            $clause .= ' AND sv.id = :'.$v[0];
        }
        elseif ($v[0] == 'version') {
            $clause .= ' AND sv.version = :'.$v[0];
        }
        elseif ($v[0] == 'search') {
            $clause .= ' AND (sv.name LIKE :'.$v[0].' OR sv.description LIKE :'.$v[0].')';
        }
        else {
            $clause .= ' AND sv.'.$v[0].' = :'.$v[0];
        }
    }
    if ($whereclause == '' && $clause !=''){
        $whereclause = 'WHERE '.substr($clause, 4);
    } else {
        $whereclause .= $clause;
    }
}

// Special handling for available upgrades
if (isset($criterias['available'])) {
    // Include version access logic
    require_once './includes/version_access.php';

    $userId = $user_data['id'];

    // Get all active versions
    $stmt = $pdo->prepare("
        SELECT sv.rowID as id, sv.version, sv.major_version, sv.minor_version, sv.patch_version,
               sv.name, sv.description, sv.file_size, sv.release_date
        FROM software_versions sv
        WHERE sv.status = 'published'
        ORDER BY sv.major_version DESC, sv.minor_version DESC, sv.patch_version DESC
    ");
    $stmt->execute();
    $versions = $stmt->fetchAll(PDO::FETCH_ASSOC);

    // Get user's current versions
    $ownedVersions = getUserOwnedVersions($userId);
    $latestOwned = getLatestOwnedVersion($userId);

    $response = [
        'current_version' => $latestOwned ? $latestOwned['version'] : null,
        'owned_versions' => array_map(function($v) {
            return [
                'version' => $v['version'],
                'name' => $v['name'],
                'purchased_at' => $v['purchased_at']
            ];
        }, $ownedVersions),
        'available_versions' => []
    ];

    // Check access for each version
    foreach ($versions as $version) {
        $accessInfo = checkVersionAccess($userId, $version['id']);

        $versionData = [
            'id' => $version['id'],
            'version' => $version['version'],
            'name' => $version['name'],
            'description' => $version['description'],
            'file_size' => $version['file_size'],
            'release_date' => $version['release_date'],
            'is_accessible' => $accessInfo['accessible'],
            'requires_payment' => $accessInfo['requires_payment'] ?? false,
            'price' => $accessInfo['price'] ?? 0.00,
            'access_reason' => $accessInfo['reason']
        ];

        // Add additional info based on access type
        if (isset($accessInfo['original_price'])) {
            $versionData['original_price'] = $accessInfo['original_price'];
        }
        if (isset($accessInfo['is_upgrade'])) {
            $versionData['is_upgrade'] = $accessInfo['is_upgrade'];
        }
        if (isset($accessInfo['from_version'])) {
            $versionData['upgrade_from'] = $accessInfo['from_version'];
        }
        if (isset($accessInfo['required_version'])) {
            $versionData['required_version'] = $accessInfo['required_version'];
        }

        $response['available_versions'][] = $versionData;
    }

    $messages = $response;
}
else {
    // Regular software versions query
    if(isset($criterias['totals']) && $criterias['totals']==''){
        //Request for total rows
        $sql = 'SELECT count(*) as count FROM software_versions sv '.$whereclause.'';
    }
    elseif (isset($criterias['list']) && $criterias['list']=='') {
        //SQL for Paging
        $sql = 'SELECT sv.* FROM software_versions sv '.$whereclause.' ORDER BY sv.major_version DESC, sv.minor_version DESC, sv.patch_version DESC';
    }
    else {
        $current_page = isset($criterias['p']) && is_numeric($criterias['p']) ? (int)$criterias['p'] : 1;
        $sql = 'SELECT sv.* FROM software_versions sv '.$whereclause.' ORDER BY sv.major_version DESC, sv.minor_version DESC, sv.patch_version DESC LIMIT ?, ?';
        $stmt = $pdo->prepare($sql);
        $stmt->bindValue(1, ($current_page - 1) * $page_rows_products, PDO::PARAM_INT);
        $stmt->bindValue(2, $page_rows_products, PDO::PARAM_INT);
        $stmt->execute();
        $messages = $stmt->fetchAll(PDO::FETCH_ASSOC);
    }

    //Execute Query for totals/list
    if(isset($criterias['totals']) && $criterias['totals']==''){
        $stmt = $pdo->prepare($sql);
        $stmt->execute();
        $messages = $stmt->fetch();
        $messages = $messages[0];
    }
    elseif(isset($criterias['list'])){
        $stmt = $pdo->prepare($sql);
        $stmt->execute();
        $messages = $stmt->fetchAll(PDO::FETCH_ASSOC);
    }
}

//------------------------------------------
//JSON_ENCODE
//------------------------------------------
$messages = json_encode($messages, JSON_UNESCAPED_UNICODE);

//Send results
echo $messages;

?>