#ifndef _APP_EXPORT_HPP_
#define _APP_EXPORT_HPP_

#include <string>

class System;

// Application layer: UI-independent operations that any frontend (TUI, GUI, …)
// can call. No console, no dialogs, no FTXUI — just System in, result out.
namespace app {

enum class ExportFormat { Csv, Ods };

// Outcome of an export. The only side effect is writing the target file; the
// caller renders `error` / the stats however it likes.
struct ExportResult {
    bool ok = false;
    std::string error;  ///< human-readable, set when !ok
    int sheets = 0;     ///< ODS: number of sheets (one per connection); 0 for CSV
    int rows = 0;       ///< wires written
};

// Map a filename extension (.csv / .ods, case-insensitive) to a format.
// Returns false if the extension is neither.
bool export_format_from_path(const std::string &path, ExportFormat &out);

// Export the system's connections to `path` in `format`. Builds the file and
// returns stats or an error. Pure core — safe to call from any frontend.
ExportResult export_connections(const System *sys, const std::string &path,
                                ExportFormat format);

}  // namespace app

#endif  // _APP_EXPORT_HPP_