#include "frontends/tui/tui.hpp"

#include "core/app/export.hpp"
#include "core/domain/connect.hpp"
#include "core/domain/system.hpp"

#include <string>
#include <vector>

// Thin UI wrapper around app::export_connections — this file only resolves
// arguments / the file dialog and renders the result. All the actual export
// (CSV / ODS building, file writing) lives in src/app/export.cpp.
void Tui::RegisterExportCommands() {
    commands["export"] = {
        {{"kind [connections]", Completion::None},
         {"filename (.csv)",    Completion::Path}},
        [this](const std::vector<std::string> &args) {
            if (!sys) { Print("no system: run 'new' first."); return; }

            if (args.empty()) {
                // Bare → the generic file dialog. The CSV/ODS filter rewrites
                // the extension; the action below dispatches on it.
                OpenFileDialog(
                    "Export — connections",
                    "export.connections",
                    "connections.csv",
                    {{"CSV", ".csv"}, {"ODS", ".ods"}},
                    [this](const std::string &path) {
                        Dispatch("export connections " + path);
                    });
                return;
            }
            if (args.size() != 2) {
                Print("usage: export <kind> <file>   (or no args for the dialog)");
                return;
            }
            const std::string &kind = args[0];
            const std::string &path = args[1];

            if (kind != "connections") {
                ShowError("export: unknown kind '" + kind + "'\n"
                          "Known kinds: connections");
                return;
            }

            app::ExportFormat fmt;
            if (!app::export_format_from_path(path, fmt)) {
                ShowError("export: unknown extension — accepted: .csv, .ods");
                return;
            }

            app::ExportResult r = app::export_connections(sys.get(), path, fmt);
            if (!r.ok) {
                ShowError("export failed:\n" + r.error);
                return;
            }

            const bool ods = (fmt == app::ExportFormat::Ods);
            std::string msg = ods ? "export connections (.ods): "
                                  : "export connections (.csv): ";
            if (ods) msg += std::to_string(r.sheets) + " sheet(s), ";
            Print(msg + std::to_string(r.rows) + " wire(s) → " + path);
        },
        /*prompt_for_missing=*/ false,
        "export structured data to CSV / ODS (kinds: connections; "
        "bare form opens the file-picker dialog)",
        /*scriptable=*/ true,
        /*interactive=*/ true,
    };
}