#pragma once
#include <juce_gui_basics/juce_gui_basics.h>
#include "Params.h"
#include "PluginProcessor.h"

class LcdPanel : public juce::Component, public juce::Timer
{
public:
    explicit LcdPanel (RMX19AudioProcessor& proc);
    ~LcdPanel() override;

    void paint (juce::Graphics&) override;

    void navUp();    void navDown();
    void navLeft();  void navRight();
    void navEnter(); void navExit();
    void applyPatchOnBrowserMove();

    void resetToHome();

    static constexpr int gridW = 160;   // dot-matrix cell resolution
    static constexpr int gridH = 64;

    bool keyTrap (const juce::KeyPress&);

private:
    enum class Screen { Splash, Home, Menu, Patch, Param, System, Info };

    RMX19AudioProcessor& proc;

    Screen screen = Screen::Splash;
    juce::uint32 splashUntil = 0;

    int cursor = 0;               // menu / patch / param cursor
    int patchCursor = 0;
    int paramScreenIdx = 0;       // which param screen is open

    float powerGlow = 0.0f;
    int lastVoices = -1;
    juce::uint32 lastMidi = 0;

    juce::Image dotImage;       // 160x64 content scratch buffer
    juce::Image displayImage;   // 320x128 cached green-on-black result
    juce::Image backdrop;       // 320x128 static base (backlight + ghost dots)
    bool contentDirty = true;

    static const juce::uint8* glyphFor (int key);
    static const juce::uint8* glyphM (int key);

    void rebuild();
    void buildBackdrop();

    void drawContent (juce::Graphics&);
    void px (juce::Graphics&, int x, int y, float intensity);
    void pxText  (juce::Graphics&, int x, int y, const juce::String&, float intensity);
    void pxTextM (juce::Graphics&, int x, int y, const juce::String&, float intensity);
    void drawFilled (juce::Graphics&, int x, int y, int w, int h, float intensity);
    void drawHBar (juce::Graphics&, int x, int y, int w, double level, float intensity);
    void drawSelBar (juce::Graphics&, int y);

    void drawSplash (juce::Graphics&);
    void drawHome (juce::Graphics&);
    void drawMenu (juce::Graphics&);
    void drawPatchList (juce::Graphics&);
    void drawParamScreen (juce::Graphics&);
    void drawSystem (juce::Graphics&);
    void drawInfo (juce::Graphics&);
    void drawFooter (juce::Graphics&);

    void selectPatchCyclic (int dir);

    void stepParam (prm::Id id, int dir, bool coarse);
    void stepDelaySync (int dir);

    void setDirty()     { contentDirty = true; repaint(); }
    void enterScreen (Screen s) { screen = s; cursor = 0; setDirty(); }

    void timerCallback() override;

    int  rowCountForScreen() const;
    void moveCursor (int d);
    void adjustCurrent (int dir, bool coarse);
    void openParamScreen (int idx);
    const char* paramScreenTitle (int idx) const;
    int  paramCountForScreen (int idx) const;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LcdPanel)
};