/*
 * Configuration Utility for DMR radios.
 *
 * Copyright (C) 2018 Serge Vakulenko, KK6ABQ
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *   3. The name of the author may not be used to endorse or promote products
 *      derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <sys/stat.h>
#include "radio.h"
#include "util.h"

/*
typedef struct { char* ident; radio_device_t* device; } radio_tab_t;

static radio_tab_t radio_tab[] = {
    { "DR780",      &radio_md380 },     // TYT MD-380, Retevis RT3, RT8
    { "MD390",      &radio_md390 },     // TYT MD-390
    { "MD-UV380",   &radio_uv380 },     // TYT MD-UV380
    { "MD-UV390",   &radio_uv390 },     // TYT MD-UV390, Retevis RT3S
    { "2017",       &radio_md2017 },    // TYT MD-2017, Retevis RT82
    { "MD9600",     &radio_md9600 },    // TYT MD-9600
    { "BF-5R",      &radio_rd5r },      // Baofeng RD-5R, TD-5R
    { "1801",       &radio_dm1801 },    // Baofeng DM-1801
    { "DM-1701",    &radio_rt84 },      // Baofeng DM-1701, Retevis RT84
    { "MD-760P",    &radio_gd77 },      // Radioddity GD-77, version 3.1.1 and later
    { "D868UVE",    &radio_d868uv },    // Anytone AT-D868UV
    { "D878UV",     &radio_d878uv },    // Anytone AT-D878UV
    { "D6X2UV",     &radio_dmr6x2 },    // BTECH DMR-6x2
    { "ZD3688",     &radio_d900 },      // Zastone D900
    { "TP660",      &radio_dp880 },     // Zastone DP880
    { "ZN><:",      &radio_rt27d },     // Radtel RT-27D
    { 0, 0 }
};
*/

static radio_device_t *active_device;          // Device-dependent interface

radio_device_t* get_active_device() {
  return active_device;
}

void set_active_device(radio_device_t* d) {
  active_device = d;
}

//
// Read the configuration from text file, and modify the firmware.
//
void radio_parse_config(radio_device_t* device, const char *filename)
{
    FILE *conf;
    char line [256], *p, *v;
    int table_id = 0, table_dirty = 0;

    fprintf(stderr, "Read configuration from file '%s'.\n", filename);
    conf = fopen(filename, "r");
    if (! conf) {
        perror(filename);
        exit(-1);
    }

    device->channel_count = 0;
    while (fgets(line, sizeof(line), conf)) {
        line[sizeof(line)-1] = 0;

        // Strip comments.
        v = strchr(line, '#');
        if (v)
            *v = 0;

        // Strip trailing spaces and newline.
        v = line + strlen(line) - 1;
        while (v >= line && (*v=='\n' || *v=='\r' || *v==' ' || *v=='\t'))
            *v-- = 0;

        // Ignore comments and empty lines.
        p = line;
        if (*p == 0)
            continue;

        if (*p != ' ') {
            // Table finished.
            table_id = 0;

            // Find the value.
            v = strchr(p, ':');
            if (! v) {
                // Table header: get table type.
                table_id = device->parse_header(device, p);
                if (! table_id) {
badline:            fprintf(stderr, "Invalid line: '%s'\n", line);
                    exit(-1);
                }
                table_dirty = 0;
                continue;
            }

            // Parameter.
            *v++ = 0;

            // Skip spaces.
            while (*v == ' ' || *v == '\t')
                v++;

            device->parse_parameter(device, p, v);

        } else {
            // Table row or comment.
            // Skip spaces.
            // Ignore comments and empty lines.
            while (*p == ' ' || *p == '\t')
                p++;
            if (*p == '#' || *p == 0)
                continue;
            if (! table_id) {
                goto badline;
            }

            if (! device->parse_row(device, table_id, ! table_dirty, p)) {
                goto badline;
            }
            table_dirty = 1;
        }
    }
    fclose(conf);
    device->update_timestamp(device);
}