#pragma once

#include <optional>
#include <string>
#include <vector>

#include <QString>

#include "BuildingType.h"
#include "ModalDialog.h"
#include "RecipeLineRow.h"

struct GameConfig;
class BuildingIconCache;
class ItemIconCache;
class Simulation;
class QPushButton;

// One selectable entry in the recipe/schematic selection dialog
// (REQ-UI-SELECT-BUTTON). The "(None)" entry uses an empty id.
struct RecipeSelectionOption
{
    std::string id;
    QString     caption;
    // What the option makes, drawn beneath its caption on the button
    // (REQ-UI-SELECT-OPTIONS). Empty for the "(None)" option, which is a caption alone.
    // A ship schematic fills the inputs and the time and leaves the outputs empty: a
    // ship is not an item and has no icon, so the caption is what it produces.
    RecipeLineRow::Spec line;
};

// Builds the lock-aware list of selectable options for a production building
// of the given type, with display captions and recipe lines
// (REQ-UI-SELECT-BUTTON, REQ-UI-SELECT-OPTIONS). The first entry is always a
// "(None)" option with an empty id. Shared by the selection dialog and the
// panel selection button so both render identical captions, and
// usable for construction sites which have no Building yet (REQ-BLD-SITE-CONFIG).
std::vector<RecipeSelectionOption> buildRecipeSelectionOptions(
    BuildingType type, Simulation& sim, const GameConfig& config);

// Modal dialog listing the options in one vertical column (REQ-UI-SELECT-OPTIONS). The
// game is paused by the caller while it is open. Clicking an option selects it and closes
// the dialog; dismissing it (close button, Escape, Q, or a click outside) leaves no
// choice (REQ-UI-DIALOG-DISMISS).
class RecipeSelectionDialog : public ModalDialog
{
    Q_OBJECT

public:
    // The icon caches draw each option's recipe line (REQ-UI-ITEM-ICON). Not owned.
    RecipeSelectionDialog(const std::vector<RecipeSelectionOption>& options,
                          const QString& title, ItemIconCache* itemIcons,
                          BuildingIconCache* buildingIcons, QWidget* parent = nullptr);

    std::optional<std::string> getChosenId() const;

    bool isDismissible() const override;

private:
    void onOptionClicked(int index);

    std::vector<std::string>   m_optionIds;
    std::optional<std::string> m_chosenId;
};