#include <memory>
#include <vector>

#include "fcitx-utils/log.h"
#include "fcitx/candidatelist.h"
#include "../src/candidatemenu.h"

using namespace fcitx;
using namespace fcitx::m3ui;

namespace {

class EngineActions : public ActionableCandidateList {
public:
    explicit EngineActions(bool available) : available_(available) {}
    bool hasAction(const CandidateWord &) const override { return available_; }
    std::vector<CandidateAction>
    candidateActions(const CandidateWord &) const override {
        CandidateAction action;
        action.setId(-42); // IDs must not be interpreted by the UI.
        action.setText("Engine action");
        CandidateAction separator;
        separator.setSeparator(true);
        return {separator, action};
    }
    void triggerAction(const CandidateWord &, int) override {}

private:
    bool available_;
};

} // namespace

int main() {
    CommonCandidateList list;
    list.setPageSize(5);
    list.append<DisplayOnlyCandidateWord>(Text("候选词"));
    list.append<DisplayOnlyCandidateWord>(Text("保留的词"));

    // Never invent a blocking action when ranking operations are unavailable.
    auto menu = candidateMenu(list, list.candidate(0));
    FCITX_ASSERT(menu.actions.empty());

    // An engine can have an action interface but no actions for this word.
    list.setActionableImpl(std::make_unique<EngineActions>(false));
    menu = candidateMenu(list, list.candidate(0));
    FCITX_ASSERT(menu.actions.empty());

    // Keep engine actions and IDs intact; omit separators, never append blocking.
    list.setActionableImpl(std::make_unique<EngineActions>(true));
    menu = candidateMenu(list, list.candidate(0));
    FCITX_ASSERT(menu.actions.size() == 1);
    FCITX_ASSERT(menu.actions[0].id() == -42);
    FCITX_ASSERT(menu.actions[0].text() == "Engine action");
    FCITX_ASSERT(list.size() == 2);
    FCITX_ASSERT(list.candidate(0).text().toString() == "候选词");

    // Do not offer an ineffective block action for a read-only list.
    DisplayOnlyCandidateList readOnly;
    readOnly.setContent(std::vector<std::string>{"只读"});
    menu = candidateMenu(readOnly, readOnly.candidate(0));
    FCITX_ASSERT(menu.actions.empty());
}