#pragma once
#include <windows.h>
#include <stdint.h>
#include <stdbool.h>

struct bpreader_config {
    bool enable;
    uint16_t port;
    wchar_t access_code[21];
};

HRESULT bpreader_init(struct bpreader_config *cfg, uint16_t port);
void bpreader_congif_load(struct bpreader_config *cfg, const wchar_t *filename);

/*
bpreader packet format WIP
n = final offset
| Offset | Meaning                                                            |
|--------|--------------------------------------------------------------------|
| 0      | Always 00                                                          |
| 1      | Always 00                                                          |
| 2      | Always FF                                                          | Header
| 3      | len(Data), 0 means no data                                         |
| 4      | FF - ((sum of header bytes) & FF) if data is present               |
|--------|--------------------------------------------------------------------|
| 5      | Always D5 (resp) or D4 (req) if data is present, identifier?       |
| 6      | Command if data is present                                         | Data
| 7..n-2 | Data if data is present                                            |
|--------|--------------------------------------------------------------------|
| n-1    | FF - ((sum of head + data bytes) & FF) if data is present, else FF | Footer
| n      | Always 00                                                          |

Commands
| Command | Response | Meaning                                            | Response Data (not including leading 0xD5)                             |
|---------|----------|----------------------------------------------------|------------------------------------------------------------------------|
| 0x00    | 0x00     | Wait Next Command                                  | None                                                                   |
| 0x02    | 0x05     | Unknown                                            | 0x0D, 0x00, 0x06, 0x00                                                 |
| 0x03    | 0x02     | Unknown, first command and then sent randomly      | 0x19                                                                   |
| 0x04    | 0x02     | Unknown, only command seen to change it's req data | 0x0F/0x33                                                              |
| 0x05    | 0x03     | Unknown                                            | 0x09, 0x00                                                             |
| 0x06    | 0x02     | Unknown                                            | 0x0F                                                                   |
| 0x09    | 0x18     | Poll for card                                      | 0x4B, 0x01, 0x01, 0x14, 0x01, [IDm], [PMm], [Sys Code]                 |
| 0x0E    | 0x02     | Unknown                                            | 0x33                                                                   |
| 0x12    | 0x0A     | Unknown                                            | 0x07, 0xFF, 0x3F, 0x0E, 0xF1, 0xFF, 0x3F, 0x0E, 0xF1                   |
| 0x14    | 0x20     | Unknown                                            | a lot, see bpreader.c                                                  |
| 0x18    | 0x0D     | Unknown                                            | 0x07, 0xDC, 0xF4, 0x3F, 0x11, 0x4D, 0x85, 0x61, 0xF1, 0x26, 0x6A, 0x87 |
*/

struct bpreader_cmd_header {
    uint8_t padding0_00;
    uint8_t padding1_00;
    uint8_t padding2_ff;
    uint8_t data_len;
    uint8_t header_checksum;
    uint8_t d_identifier;
    uint8_t cmd;
};

struct bpreader_cmd_footer {    
    uint8_t checksum;
    uint8_t padding;
};