#ifndef DSLKEYS_H
#define DSLKEYS_H

#include <QString>
#include <QVariantMap>

// Internal keys used by the DSL runtime.
// These are set by the interpreter and consumed by the application.
// XScript authors interact with these via functions like set_name(), set_display(), etc.
enum class DslKey {
    Type,       // "_type" - parsed type name
    Name,       // "_name" - display name for tree
    Display,    // "_display" - category display override
    Path,       // "_path" - source file path
    Ext,        // "_ext" - file extension (lowercase)
    Basename,   // "_basename" - filename without extension
    Preview,    // "_preview" - preview data for viewers
    Viewer,     // "_viewer" - viewer type override
    Hidden      // "$hidden" - hide from tree
};

// Prefix for skip_tree markers: "$skip_tree_<varname>"
constexpr const char* kSkipTreePrefix = "$skip_tree_";

namespace DslKeys {

// Convert enum to string key
inline QString toString(DslKey key) {
    switch (key) {
        case DslKey::Type:     return QStringLiteral("_type");
        case DslKey::Name:     return QStringLiteral("_name");
        case DslKey::Display:  return QStringLiteral("_display");
        case DslKey::Path:     return QStringLiteral("_path");
        case DslKey::Ext:      return QStringLiteral("_ext");
        case DslKey::Basename: return QStringLiteral("_basename");
        case DslKey::Preview:  return QStringLiteral("_preview");
        case DslKey::Viewer:   return QStringLiteral("_viewer");
        case DslKey::Hidden:   return QStringLiteral("$hidden");
    }
    return QString();
}

// Helper to get value from QVariantMap
inline QVariant get(const QVariantMap& vars, DslKey key) {
    return vars.value(toString(key));
}

// Helper to get string value
inline QString getString(const QVariantMap& vars, DslKey key) {
    return vars.value(toString(key)).toString();
}

// Helper to check if key exists
inline bool contains(const QVariantMap& vars, DslKey key) {
    return vars.contains(toString(key));
}

// Helper to set value
inline void set(QVariantMap& vars, DslKey key, const QVariant& value) {
    vars[toString(key)] = value;
}

// Helper to check if a variable should be skipped in tree
inline bool hasSkipTree(const QVariantMap& vars, const QString& varName) {
    return vars.contains(QString(kSkipTreePrefix) + varName);
}

// Helper to set skip_tree marker
inline void setSkipTree(QVariantMap& vars, const QString& varName) {
    vars[QString(kSkipTreePrefix) + varName] = true;
}

// Check if this is an internal key (starts with _ or $)
inline bool isInternalKey(const QString& key) {
    return key.startsWith('_') || key.startsWith('$');
}

} // namespace DslKeys

#endif // DSLKEYS_H