/**
 * Empty battery
 */

#include <stdint.h>
#include "ssd1306.h"
#include "user_interface.h"

void show_empty_battery()
{
    ssd1306_clearScreen();

    //     *********
    //  ****       *
    //  ****     x *
    //  ****       *
    //     *********

#define capwid 6
#define hei 24
#define caphei 12
#define wid 50
#define thic 2
#define inpad 2
#define charge 2

#define ofsx ((DISPLAY_W - capwid - wid)/2)
#define ofsy ((DISPLAY_H - hei)/2)

    const uint8_t rects[6][4] = {
            // cap
            {
                    0, (hei - caphei) / 2,
                    capwid - 1, hei - (hei - caphei) / 2 - 1
            },
            // left line
            {
                    capwid, 0,
                    capwid+thic - 1, hei - 1
            },
            // top line
            {
                    capwid + thic, 0,
                    capwid + wid - thic - 1, thic - 1
            },
            // right line
            {
                    capwid + wid - thic, 0,
                    capwid + wid - 1, hei - 1
            },
            // "remaining charge" line
            {
                    capwid + wid - thic - inpad - charge, thic + inpad,
                    capwid + wid - thic - inpad - 1, hei - thic - inpad - 1
            },
            // bottom line
            {
                    capwid + thic, hei - thic,
                    capwid + wid - thic - 1, hei - 1
            }
    };

    for (int i = 0; i < 6; i++) {
        ssd1306_fillRect(
                ofsx + rects[i][0],
                ofsy + rects[i][1],
                ofsx + rects[i][2],
                ofsy + rects[i][3]
        );
    }
}