#pragma once

#include <cstdint>
#include <string>


struct Color {
    uint8_t r, g, b;
} __attribute__ ((packed));


typedef uint16_t Fixed;
constexpr int factor = 65536;
constexpr int shift = 16;


class Pattern {
public:
    virtual ~Pattern() = default;

    struct State {
        virtual ~State() = default;
    };

    virtual State* start(int) const = 0;

    virtual void step(Color[], int, State*) const = 0;
};


class LEDStrip {
public:
    LEDStrip(int length = 0);
    ~LEDStrip() { if (state) delete state; }

    void step();

    virtual void show() = 0;
    virtual void length_changing(int) {};

    void setPattern(const Pattern *_pattern) { pattern = _pattern; update_state(); }
    const Pattern* getPattern() const { return pattern; }

    void setLength(int length);
    int getLength() const { return length; }

protected:
    int length;
    const Pattern *pattern;
    Color *pixels;

private:
    void update_state();

    Pattern::State *state;
};

class TerminalLEDs : public LEDStrip {
public:
    TerminalLEDs(int length = 0) : LEDStrip(length) {}
    void show();
};