#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 bool firstRunEver();
    static juce::File uiStateFile();

    static constexpr int gridW = 160;   // dot-matrix cell resolution
    static constexpr int gridH = 64;
    // internal supersampling: dots are rasterized as anti-aliased circles at 4x,
    // then box-downsampled 2:1 onto the 2px/dot presentation image. Downsampling
    // turned off = chunky squares; 2x direct = boxy edges. 4x gives genuine round,
    // separated dots that survive the (fractional) uiScale upscale.
    static constexpr int subsample = 4;
    static constexpr int presentScale = 2;   // presentation pixels per logical dot

    bool keyTrap (const juce::KeyPress&);

    void mouseDown (const juce::MouseEvent&) override;

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

    RMX19AudioProcessor& proc;

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

    int cursor = 0;               // menu / param / system / catCursor (when in Category)
    int patchCursor = 0;          // patch cursor (global index)
    int paramScreenIdx = 0;       // which param screen is open
    int catCursor = 0;            // category browser cursor

    std::vector<int> filteredPatches;  // patch indices for current category filter

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

    // last-screen persistence: the panel reopens where the user left off
    juce::uint32 lastUiWrite = 0;
    bool uiDirty = false;

    void rememberUiState();
    bool restoreUiState();

    juce::Image displayImage;   // (gridW*subsample)x(gridH*subsample) render target: glass base + content dots
    juce::Image presentImage;   // (gridW*presentScale)x(gridH*presentScale) box-downsampled for the panel
    juce::Image backdrop;       // (gridW*subsample)x(gridH*subsample) static 3D glass base (backlight + sheen + vignette + ghost dots)
    bool contentDirty = true;

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

    void rebuild();
    void buildBackdrop();
    juce::Rectangle<int> lcdImageRect() const;

    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 drawCategory (juce::Graphics&);
    void drawPatches (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; uiDirty = true; setDirty(); }

    // open the category/patch browser, positioned on the loaded patch's category
    void openPatchBrowser();

    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;
    int  patchCountForCurrentView() const;
    int  patchIndexAtCursor (int viewIdx) const;
    void buildFilteredPatches (int catIdx);

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LcdPanel)
};