#pragma once

#include <memory>
#include <string>
#include <vector>

#include "app.h"
#include "compass.h"
#include "dialog_model.h"
#include "line_editor.h"
#include "list_model.h"
#include "places.h"
#include "services/gnss_service.h"
#include "services/storage_service.h"
#include "settings.h"

namespace roro {

// GNSS (see docs/milestones/M2.md, Q59): the Position view, the Sky view with every satellite in
// view placed by direction and elevation, and the Compass (issue #16, docs/milestones/H1.md): a
// rose that turns with the device, and the way to a Place the user marked. Tab goes round them.
class GnssApp : public App {
   public:
    GnssApp(GnssService& gnss, const Settings& settings, StorageService& storage)
        : gnss_(gnss), settings_(settings), storage_(storage) {}
    void onEnter() override;
    bool onKey(const KeyEvent& e) override;
    bool textEntryActive() const override { return mode_ == Mode::Name; }
    void update(uint32_t nowMs) override;
    void draw(Canvas& c) override;
    void help(std::vector<KeyHelp>& out) const override;
    const char* helpTitle() const override;
    bool badge() const override { return gnss_.tracking(); }

   private:
    enum class View { Position, Sky, Compass };
    // Over the Compass: the list of Places, and the name of a new one.
    enum class Mode { View, Places, Name };

    void drawPosition(Canvas& c);
    void drawSky(Canvas& c);
    void drawCompass(Canvas& c);
    void drawPlaces(Canvas& c);
    bool compassKey(const KeyEvent& e);
    bool placesKey(const KeyEvent& e);
    void readImu();
    void loadPlaces();
    void savePlaces();
    void mark();
    void aimAtSun();
    void say(const std::string& text);

    GnssService& gnss_;
    const Settings& settings_;
    StorageService& storage_;
    View view_ = View::Position;
    Mode mode_ = Mode::View;
    uint32_t lastDrawMs_ = 0;
    std::string refusal_;  // why something couldn't be done, or that it was: shown for a few seconds
    uint32_t refusalMs_ = 0;

    gnss::HeadingFilter heading_;
    uint32_t imuUs_ = 0, imuMs_ = 0;
    int courseSecond_ = -1;      // the Fix whose course was last given to the filter
    float shownHeading_ = -1, shownTiltX_ = 0, shownTiltY_ = 0;
    std::vector<gnss::Place> places_;
    bool placesLoaded_ = false;
    int target_ = -1;  // in places_; -1: none
    ListModel list_{6};
    LineEditor name_{gnss::kPlaceNameBytes};
    std::unique_ptr<DialogModel> dialog_;
};

}  // namespace roro