// Function lib for display of boat data in various chart formats
#pragma once
#include <stdint.h>
#include <Arduino.h>
#include "Pagedata.h"

struct Pos {
    int x;
    int y;
};
template <typename T> class RingBuffer;
class GwLog;

template <typename T>
class Chart {
protected:
    CommonData *commonData;
    GwLog *logger;

    RingBuffer<T> &dataBuf; // Buffer to display
    int8_t chrtDir; // Chart timeline direction: [0] = horizontal, [1] = vertical
    int8_t chrtSz; // Chart size: [0] = full size, [1] = half size left/top, [2] half size right/bottom
    int dfltRng; // Default range of chart, e.g. 30 = [0..30]
    uint16_t fgColor; // color code for any screen writing
    uint16_t bgColor; // color code for screen background
    bool useSimuData; // flag to indicate if simulation data is active

    int top = 48; // display top header lines
    int bottom = 22; // display bottom lines
    int gap = 20; // gap between 2 charts; actual gap is 2x <gap>
    int xOffset = 33; // offset for horizontal axis (time/value), because of space for left vertical axis labeling
    int yOffset = 10; // offset for vertical axis (time/value), because of space for top horizontal axis labeling
    int dWidth; // Display width
    int dHeight; // Display height
    int timAxis, valAxis; // size of time and value chart axis
    Pos cStart; // start point of chart area
    int chrtRng; // Range of buffer values from min to max value

    String dbName, dbFormat; // Name and format of data buffer
    int16_t dbMAX_VAL; // Highest possible value of buffer of type <T> -> indicates invalid value in buffer
    size_t bufSize; // History buffer size: 1.920 values for 32 min. history chart
    int intvBufSize; // Buffer size used for currently selected time interval
    int count; // current size of buffer
    int numBufVals; // number of wind values available for current interval selection
    int bufStart; // 1st data value in buffer to show
    int numAddedBufVals; // Number of values added to buffer since last display
    size_t currIdx; // Current index in TWD history buffer
    size_t lastIdx; // Last index of TWD history buffer
    size_t lastAddedIdx = 0; // Last index of TWD history buffer when new data was added
    int oldChrtIntv = 0; // remember recent user selection of data interval

    void calcChrtRng();
    void drawChrtValAxis();

public:
    Chart(RingBuffer<T>& dataBuf, int8_t chrtDir, int8_t chrtSz, int dfltRng, CommonData& common, bool useSimuData);
    ~Chart();
    void drawChrtTimeAxis(int8_t chrtIntv);
    void drawChrt(int8_t chrtIntv, GwApi::BoatValue currValue);
    void prntCurrValue(GwApi::BoatValue* currValue, Pos chrtPos);

};