#include "core/select.h"
#include "core/tokens.h"
#include <imgui.h>
#include <cstdio>

namespace fn_ui {

bool select(const char* label, int* selected_idx,
            const char* const* options, int count,
            bool allow_none) {
    using namespace fn_tokens;
    if (!selected_idx) return false;

    // Label muted
    ImGui::PushStyleColor(ImGuiCol_Text, colors::text_muted);
    ImGui::TextUnformatted(label);
    ImGui::PopStyleColor();

    // Combo con estilo tokens
    ImGui::PushStyleColor(ImGuiCol_FrameBg,        colors::bg);
    ImGui::PushStyleColor(ImGuiCol_FrameBgHovered, colors::surface_hover);
    ImGui::PushStyleColor(ImGuiCol_FrameBgActive,  colors::surface);
    ImGui::PushStyleColor(ImGuiCol_Border,         colors::border);
    ImGui::PushStyleColor(ImGuiCol_PopupBg,        colors::surface);
    ImGui::PushStyleColor(ImGuiCol_Button,         ImVec4(0, 0, 0, 0));
    ImGui::PushStyleColor(ImGuiCol_ButtonHovered,  colors::surface_hover);
    ImGui::PushStyleVar(ImGuiStyleVar_FrameRounding, radius::sm);
    ImGui::PushStyleVar(ImGuiStyleVar_FrameBorderSize, 1.0f);
    ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(spacing::sm, spacing::xs + 2.0f));

    char id[160];
    std::snprintf(id, sizeof(id), "##%s", label);
    ImGui::SetNextItemWidth(-FLT_MIN);

    const char* preview = "(none)";
    if (*selected_idx >= 0 && *selected_idx < count) preview = options[*selected_idx];

    bool changed = false;
    if (ImGui::BeginCombo(id, preview)) {
        if (allow_none) {
            bool is_sel = (*selected_idx == -1);
            if (ImGui::Selectable("(none)", is_sel)) {
                if (*selected_idx != -1) { *selected_idx = -1; changed = true; }
            }
            if (is_sel) ImGui::SetItemDefaultFocus();
        }
        for (int i = 0; i < count; i++) {
            bool is_sel = (*selected_idx == i);
            if (ImGui::Selectable(options[i], is_sel)) {
                if (*selected_idx != i) { *selected_idx = i; changed = true; }
            }
            if (is_sel) ImGui::SetItemDefaultFocus();
        }
        ImGui::EndCombo();
    }

    ImGui::PopStyleVar(3);
    ImGui::PopStyleColor(7);
    return changed;
}

} // namespace fn_ui