/*
 * An example of a clustered category chart using the libxlsxwriter library.
 *
 * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
 *
 */

#include "xlsxwriter.h"

/*
 * Write some data to the worksheet.
 */
void write_worksheet_data(lxw_worksheet *worksheet, lxw_format *bold) {

    worksheet_write_string(worksheet, 0, 0, "Types",      bold);
    worksheet_write_string(worksheet, 1, 0, "Type 1",     NULL);
    worksheet_write_string(worksheet, 4, 0, "Type 2",     NULL);

    worksheet_write_string(worksheet, 0, 1, "Sub Type",   bold);
    worksheet_write_string(worksheet, 1, 1, "Sub Type A", NULL);
    worksheet_write_string(worksheet, 2, 1, "Sub Type B", NULL);
    worksheet_write_string(worksheet, 3, 1, "Sub Type C", NULL);
    worksheet_write_string(worksheet, 4, 1, "Sub Type D", NULL);
    worksheet_write_string(worksheet, 5, 1, "Sub Type E", NULL);

    worksheet_write_string(worksheet, 0, 2, "Value 1",    bold);
    worksheet_write_number(worksheet, 1, 2, 5000,         NULL);
    worksheet_write_number(worksheet, 2, 2, 2000,         NULL);
    worksheet_write_number(worksheet, 3, 2, 250,          NULL);
    worksheet_write_number(worksheet, 4, 2, 6000,         NULL);
    worksheet_write_number(worksheet, 5, 2, 500,          NULL);

    worksheet_write_string(worksheet, 0, 3, "Value 2",    bold);
    worksheet_write_number(worksheet, 1, 3, 8000,         NULL);
    worksheet_write_number(worksheet, 2, 3, 3000,         NULL);
    worksheet_write_number(worksheet, 3, 3, 1000,         NULL);
    worksheet_write_number(worksheet, 4, 3, 6000,         NULL);
    worksheet_write_number(worksheet, 5, 3, 300,          NULL);

    worksheet_write_string(worksheet, 0, 4, "Value 3",    bold);
    worksheet_write_number(worksheet, 1, 4, 6000,         NULL);
    worksheet_write_number(worksheet, 2, 4, 4000,         NULL);
    worksheet_write_number(worksheet, 3, 4, 2000,         NULL);
    worksheet_write_number(worksheet, 4, 4, 6500,         NULL);
    worksheet_write_number(worksheet, 5, 4, 200,          NULL);

}

/*
 * Create a worksheet with examples charts.
 */
int main() {

    lxw_workbook  *workbook  = workbook_new("chart_clustered2.xlsx");
    lxw_worksheet *worksheet = workbook_add_worksheet(workbook, NULL);
    lxw_chart     *chart     = workbook_add_chart(workbook, LXW_CHART_COLUMN);

    /* Add a bold format to use to highlight the header cells. */
    lxw_format *bold = workbook_add_format(workbook);
    format_set_bold(bold);

    /* Write some data for the chart. */
    write_worksheet_data(worksheet, bold);

    /*
     * Configure the series. Note, that the categories are 2D ranges (from
     * column A to column B). This creates the clusters. The series are shown
     * as formula strings for clarity but you can also use variables with the
     * chart_series_set_categories() and chart_series_set_values()
     * functions. See the docs.
     */
    chart_add_series(chart,
                     "=Sheet1!$A$2:$B$6",
                     "=Sheet1!$C$2:$C$6");

    chart_add_series(chart,
                     "=Sheet1!$A$2:$B$6",
                     "=Sheet1!$D$2:$D$6");

    chart_add_series(chart,
                     "=Sheet1!$A$2:$B$6",
                     "=Sheet1!$E$2:$E$6");

    /* Set an Excel chart style. */
    chart_set_style(chart, 37);

    /* Turn off the legend. */
    chart_legend_set_position(chart, LXW_CHART_LEGEND_NONE);

    /* Insert the chart into the worksheet. */
    worksheet_insert_chart(worksheet, CELL("G3"), chart);

    return workbook_close(workbook);
}