/**
 * @file lv_chart.h
 *
 */

#ifndef LV_CHART_H
#define LV_CHART_H

#ifdef __cplusplus
extern "C" {
#endif

/*********************
 *      INCLUDES
 *********************/
#ifdef LV_CONF_INCLUDE_SIMPLE
#include "lv_conf.h"
#else
#include "display/lv_conf.h"
#endif

#if USE_LV_CHART != 0

#include "display/lv_core/lv_obj.h"
#include "lv_line.h"

/*********************
 *      DEFINES
 *********************/
#define LV_CHART_POINT_DEF  (LV_COORD_MIN)

/**********************
 *      TYPEDEFS
 **********************/
typedef struct
{
    lv_coord_t * points;
    lv_color_t color;
    uint16_t start_point;
} lv_chart_series_t;

/*Data of chart */
typedef struct
{
    /*No inherited ext*/ /*Ext. of ancestor*/
    /*New data for this type */
    lv_ll_t series_ll;       /*Linked list for the data line pointers (stores lv_chart_dl_t)*/
    lv_coord_t ymin;          /*y min value (used to scale the data)*/
    lv_coord_t ymax;          /*y max value (used to scale the data)*/
    uint8_t hdiv_cnt;     /*Number of horizontal division lines*/
    uint8_t vdiv_cnt;     /*Number of vertical division lines*/
    uint16_t point_cnt;   /*Point number in a data line*/
    uint8_t type    :4;   /*Line, column or point chart (from 'lv_chart_type_t')*/
    struct {
        lv_coord_t width;  /*Line width or point radius*/
        uint8_t num;       /*Number of data lines in dl_ll*/
        lv_opa_t opa;      /*Opacity of data lines*/
        lv_opa_t dark;     /*Dark level of the point/column bottoms*/
    } series;
} lv_chart_ext_t;

/*Chart types*/
enum
{
    LV_CHART_TYPE_LINE = 0x01,              /*Connect the points with lines*/
    LV_CHART_TYPE_COLUMN = 0x02,            /*Draw columns*/
    LV_CHART_TYPE_POINT = 0x04,             /*Draw circles on the points*/
    LV_CHART_TYPE_VERTICAL_LINE = 0x08,     /*Draw vertical lines on points (useful when chart width == point count)*/
};
typedef uint8_t lv_chart_type_t;


/**********************
 * GLOBAL PROTOTYPES
 **********************/

/**
 * Create a chart background objects
 * @param par pointer to an object, it will be the parent of the new chart background
 * @param copy pointer to a chart background object, if not NULL then the new object will be copied from it
 * @return pointer to the created chart background
 */
lv_obj_t * lv_chart_create(lv_obj_t * par, const lv_obj_t * copy);

/*======================
 * Add/remove functions
 *=====================*/

/**
 * Allocate and add a data series to the chart
 * @param chart pointer to a chart object
 * @param color color of the data series
 * @return pointer to the allocated data series
 */
lv_chart_series_t * lv_chart_add_series(lv_obj_t * chart, lv_color_t color);

/**
 * Clear the point of a serie
 * @param chart pointer to a chart object
 * @param serie pointer to the chart's serie to clear
 */
void lv_chart_clear_serie(lv_obj_t * chart, lv_chart_series_t * serie);

/*=====================
 * Setter functions
 *====================*/

/**
 * Set the number of horizontal and vertical division lines
 * @param chart pointer to a graph background object
 * @param hdiv number of horizontal division lines
 * @param vdiv number of vertical division lines
 */
void lv_chart_set_div_line_count(lv_obj_t * chart, uint8_t hdiv, uint8_t vdiv);

/**
 * Set the minimal and maximal y values
 * @param chart pointer to a graph background object
 * @param ymin y minimum value
 * @param ymax y maximum value
 */
void lv_chart_set_range(lv_obj_t * chart, lv_coord_t ymin, lv_coord_t ymax);

/**
 * Set a new type for a chart
 * @param chart pointer to a chart object
 * @param type new type of the chart (from 'lv_chart_type_t' enum)
 */
void lv_chart_set_type(lv_obj_t * chart, lv_chart_type_t type);

/**
 * Set the number of points on a data line on a chart
 * @param chart pointer r to chart object
 * @param point_cnt new number of points on the data lines
 */
void lv_chart_set_point_count(lv_obj_t * chart, uint16_t point_cnt);

/**
 * Set the opacity of the data series
 * @param chart pointer to a chart object
 * @param opa opacity of the data series
 */
void lv_chart_set_series_opa(lv_obj_t * chart, lv_opa_t opa);

/**
 * Set the line width or point radius of the data series
 * @param chart pointer to a chart object
 * @param width the new width
 */
void lv_chart_set_series_width(lv_obj_t * chart, lv_coord_t width);

/**
 * Set the dark effect on the bottom of the points or columns
 * @param chart pointer to a chart object
 * @param dark_eff dark effect level (LV_OPA_TRANSP to turn off)
 */
void lv_chart_set_series_darking(lv_obj_t * chart, lv_opa_t dark_eff);

/**
 * Initialize all data points with a value
 * @param chart pointer to chart object
 * @param ser pointer to a data series on 'chart'
 * @param y the new value  for all points
 */
void lv_chart_init_points(lv_obj_t * chart, lv_chart_series_t * ser, lv_coord_t y);

/**
 * Set the value s of points from an array
 * @param chart pointer to chart object
 * @param ser pointer to a data series on 'chart'
 * @param y_array array of 'lv_coord_t' points (with 'points count' elements )
 */
void lv_chart_set_points(lv_obj_t * chart, lv_chart_series_t * ser, lv_coord_t * y_array);

/**
 * Shift all data right and set the most right data on a data line
 * @param chart pointer to chart object
 * @param ser pointer to a data series on 'chart'
 * @param y the new value of the most right data
 */
void lv_chart_set_next(lv_obj_t * chart, lv_chart_series_t * ser, lv_coord_t y);

/**
 * Set the style of a chart
 * @param chart pointer to a chart object
 * @param style pointer to a style
 */
static inline void lv_chart_set_style(lv_obj_t *chart, lv_style_t *style)
{
    lv_obj_set_style(chart, style);
}

/*=====================
 * Getter functions
 *====================*/

/**
 * Get the type of a chart
 * @param chart pointer to chart object
 * @return type of the chart (from 'lv_chart_t' enum)
 */
lv_chart_type_t lv_chart_get_type(const lv_obj_t * chart);

/**
 * Get the data point number per data line on chart
 * @param chart pointer to chart object
 * @return point number on each data line
 */
uint16_t lv_chart_get_point_cnt(const lv_obj_t * chart);

/**
 * Get the opacity of the data series
 * @param chart pointer to chart object
 * @return the opacity of the data series
 */
lv_opa_t lv_chart_get_series_opa(const lv_obj_t * chart);

/**
 * Get the data series width
 * @param chart pointer to chart object
 * @return the width the data series (lines or points)
 */
lv_coord_t lv_chart_get_series_width(const lv_obj_t * chart);

/**
 * Get the dark effect level on the bottom of the points or columns
 * @param chart pointer to chart object
 * @return dark effect level (LV_OPA_TRANSP to turn off)
 */
lv_opa_t lv_chart_get_series_darking(const lv_obj_t * chart);

/**
 * Get the style of an chart object
 * @param chart pointer to an chart object
 * @return pointer to the chart's style
 */
static inline lv_style_t* lv_chart_get_style(const lv_obj_t *chart)
{
    return lv_obj_get_style(chart);
}

/*=====================
 * Other functions
 *====================*/

/**
 * Refresh a chart if its data line has changed
 * @param chart pointer to chart object
 */
void lv_chart_refresh(lv_obj_t * chart);

/**********************
 *      MACROS
 **********************/

#endif  /*USE_LV_CHART*/

#ifdef __cplusplus
} /* extern "C" */
#endif

#endif  /*LV_CHART_H*/
