#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <time.h>
#include <hidapi.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include "howard.h"

#define TRUE    (-1)
#define FALSE   (0)

#define BUFLEN 8196
#define BUFLENSMALL 255

// Benestar sound meter
//#define MIC_VID  (0x1630)
//#define MIC_PID  (0x05dc)
#define MIC_VID  (0x8817)
#define MIC_PID  (0x2109)

#define CMD_CAPTURE  (0xb3)


const char *rangestr[] = {
    "30-130",
    "30-80",
    "50-100",
    "60-110",
    "80-130",
};

char influxhost[BUFLENSMALL];
char influxdb[BUFLENSMALL];
char influxuser[BUFLENSMALL];
char influxpass[BUFLENSMALL];

#define FLAG_DBCMODE (0x10)
#define FLAG_FASTMODE (0x40)

#define E_TIMEOUT -1
#define E_BADREAD -2

// ANSI stuff
#define BOLD "\x1b[1m"
#define ITALIC "\x1b[3m"
#define STRIKE "\x1b[9m"
#define PLAIN "\x1b[0m"
#define UNDERLINE "\x1b[4m"
#define RED "\x1b[31m"
#define MAGENTA "\x1b[35m"
#define GREEN "\x1b[32m"
#define YELLOW "\x1b[33m"
#define BLUE "\x1b[34m"
#define CYAN "\x1b[36m"
#define GREY "\x1b[2;37m"

void colprintf( char *prefix, const char *col, char *format, va_list *args ) {
    printf("%s%s%s %s%s",col,BOLD,prefix,PLAIN,col);
    vprintf(format, *args);
    printf("%s\n",PLAIN);
}

void info( char* format, ... ) {
    va_list args;
    va_start(args, format);
    colprintf( "*", CYAN, format, &args);
    va_end( args );
}

void err( char* format, ... ) {
    va_list args;
    va_start(args, format);
    colprintf( "ERROR:", RED, format, &args);
    va_end( args );
}

void warn( char* format, ... ) {
    va_list args;
    va_start(args, format);
    colprintf( "WARNING:", YELLOW, format, &args);
    va_end( args );
}

int hextoint(char *hex) {
    int base=16;
    if (strstr(hex, "0x") == hex) {
        base=0;
    }
    return strtol(hex, NULL, base);
}

int readresult(hid_device *dev, uint8_t *retbuf) {
    int totbytes = 0;
    int wantbytes = 8;
    time_t starttime;
    int timeoutms = 2000;
    starttime = time(NULL);

    while (totbytes != wantbytes) {
        int thisbytes = 0;
        thisbytes = hid_read_timeout(dev, &retbuf[totbytes], wantbytes + 1 - totbytes, timeoutms);
        if (thisbytes < 0) {
            err("Incomplete read from usb (got %d bytes, want %d bytes): %ls",totbytes,wantbytes, hid_error(dev));
            return E_BADREAD;
        }

        totbytes += thisbytes;
        if (time(NULL) - starttime > (timeoutms*1000)) {
            warn("Timeout reading from usb");
            return E_TIMEOUT;
        }
    }
    return 0;
}

void showlevel(uint8_t *buf) {
    uint16_t decibels;
    uint8_t flags, rangeidx;
    time_t now;
    char *longformat = "%12s: %ld\n";
    char *strformat = "%12s: %s\n";
    char *dbformat = "%12s: %4.2f %s\n";
    decibels = buf[0] << 8 | buf[1];
    flags = buf[2];
    rangeidx = buf[2] & 0xf;
    now = time(NULL);

    printf(longformat, "Time", now);
    printf(dbformat, "Level", (double)decibels/10.0, flags & FLAG_DBCMODE ? "dBC" : "dBA");
    printf(strformat, "Mode", flags & FLAG_FASTMODE ? "Fast" : "Slow");
    printf(strformat, "Range", rangeidx > 0x4 ? "unknown" : rangestr[rangeidx]);
}

int tcpconnect(char *hname, int port) {
    int sockfd;
    struct sockaddr_in servaddr;
    struct hostent *hptr;

    hptr = resolve(hname);
    if (!hptr) return TRUE;

    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0) {
        perror("socket()");
        return -1;
    }
    servaddr.sin_family = hptr->h_addrtype;
    servaddr.sin_port = htons(8086);
    memcpy(&servaddr.sin_addr, hptr->h_addr_list[0], hptr->h_length);
    bzero(servaddr.sin_zero, sizeof(servaddr.sin_zero));
    if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr))) {
        printf("errno is %d\n", errno);
        perror("tcpconnect()");
        return -1;
    }
    return sockfd;
}

int dohttp(char *hname, int port, char *header, char *body, char *retbuf) {
    char response[BUFLEN];
    char *p,*dp,retcode_str[BUFLENSMALL];
    ssize_t n;
    int sockfd,retcode_int = -1;

    sockfd = tcpconnect(hname,port);
    if (sockfd < 0) {
        err("TCP connect to %s:%d failed", hname, port);
        return TRUE;
    }

    if (write(sockfd, header, strlen(header)) < 0) {
        err("POST failed during header send");
        close(sockfd);
        return -1;
    }

    if (write(sockfd, body, strlen(body)) < 0) {
        err("POST failed during body send");
        close(sockfd);
        return -1;
    }

    // get response
    n = read(sockfd, response, sizeof(response));
    if (n < 0) {
        err("POST failed during response read");
        close(sockfd);
        return -1;
    }
    response[n] = 0; // NUL-terminate
    close(sockfd);

    if (retbuf) strncpy(retbuf, response, BUFLEN);

    // HTTP/1.x 204
    retcode_int = -1;

    p = strstr(response, "HTTP/1");
    if (p)  {
        p += 9; // should now be at start of return code
        dp = retcode_str;
        for ( ;
            (p + 3 < (response + strlen(response))) && *p && isdigit(*p);
            p++,dp++) {
            *dp = *p;
        }
        *dp = 0;
        retcode_int = atoi(retcode_str);
    } else {
        retcode_int = -1;
    }
    return retcode_int;
}

struct hostent *resolve(char *hname) {
    struct hostent *hptr;
    hptr = gethostbyname(hname);
    if (hptr == NULL) {
            err("Failed to resolve %s (%s)",hname,hstrerror(h_errno));
            return NULL;
    }
    if (hptr->h_addrtype != AF_INET) {
            err("No IN records for %s.",hname);
            return NULL;
    }
    if (hptr->h_addr_list == NULL) {
            err("No A records for %s.",hname);
            return NULL;
    }
    return hptr;
}

int influx_init(char *hname, char *db, char *user, char *pass) {
    strncpy(influxhost, hname, BUFLENSMALL);
    strncpy(influxdb, db, BUFLENSMALL);
    strncpy(influxuser, user, BUFLENSMALL);
    strncpy(influxpass, pass, BUFLENSMALL);
    return FALSE;
}

int influx_cmd(enum influxcmdtype cmdtype, char *cmd, char *retbuf) {
    char header[BUFLEN];
    char newcmd[BUFLEN+2];
    int rc = -1;

    if (cmdtype == I_WRITE) {
        snprintf(header, BUFLEN, "POST /write?db=%s&u=%s&p=%s HTTP/1.1\r\nHost: influx:8086\r\nContent-Length: %ld\r\n\r\n", influxdb, influxuser, influxpass, strlen(cmd));
        snprintf(newcmd,BUFLEN,"%s",cmd);
    } else if (cmdtype == I_READ) {
        snprintf(header, BUFLEN, "GET /query?db=%s&u=%s&p=%s HTTP/1.1\r\nHost: influx:8086\r\nContent-Length: %ld\r\n\r\n", influxdb, influxuser, influxpass, strlen(cmd)+2);
        snprintf(newcmd,BUFLEN,"q=%s",cmd);
    } else if (cmdtype == I_PING) {
        snprintf(header, BUFLEN, "GET /ping HTTP/1.1\r\nHost: influx:8086\r\n\r\n");
        strncpy(newcmd,"",BUFLEN);
    } else {
        err("Invalid influx command type (%d)", cmdtype);
        return TRUE;
    }

    rc = dohttp(influxhost, 8086, header, newcmd, retbuf);
    if (rc != 204) {
        err("Influx write to %s/%s failed (HTTP %d)",influxhost,influxdb,rc);
        return TRUE;
    }
    return FALSE;
}

int influx_insert(char *cmd, char *retbuf) {
    return influx_cmd(I_WRITE, cmd, retbuf);
}

int influx_query(char *cmd, char *retbuf ) {
    return influx_cmd(I_READ, cmd, retbuf);
}

int influx_ping(char *retbuf) {
    int rv;
    rv = influx_cmd(I_PING, "", retbuf);
    if (!rv) {
        info("Ping success:\n%s\n", retbuf);
    }
    return rv;
}

int influx_write_decibels(double decibels) {
    char cmd[BUFLEN];
    snprintf(cmd, BUFLEN, "volume decibels=%0.1f\n", decibels);
    influx_insert(cmd, NULL);
    return 0;
}

int main(int argc, char *argv[]) {
    //unsigned char buf[65];
    //hid_device *handle;
    uint8_t capture_cmd[8] = { CMD_CAPTURE };
    uint8_t buf[8];
    char retbuf[BUFLEN];
    int res;
    int i;
    enum mode_enum { M_PROBE, M_TEST } mode = M_PROBE;
    hid_device *dev = NULL;

    // handle args
    for (i=1; i<argc;i++) {
        if (!strcmp(argv[i], "-t")) {
            mode = M_TEST;
        }
    }
    influx_init("gridbug.nethack.net", "haven", "", "");

    if (mode == M_TEST) {
        int rv;
        printf("running ping...\n");
        rv = influx_ping(retbuf);
    }
    exit(1);
    if (hid_init()) {
        err("Failed to initialise hidapi.");
        exit(1);
    }
    dev = hid_open(MIC_VID, MIC_PID, NULL);
    if (!dev) {
        err("Benestar USB sound meter not found (vendor 0x%04hx, product 0x%04hx).", MIC_VID, MIC_PID);
        exit(1);
    }

    if (mode == M_TEST) {
        info("Found Benestar USB sound meter (vendor 0x%04hx, product 0x%04hx).", MIC_VID, MIC_PID);
        exit(0);
    }

    // get current reading
    res = hid_write(dev, capture_cmd, 9);

    // wait for response
    // see: https://github.com/pvachon/gm1356/blob/master/splread.c
    res = E_TIMEOUT;
    while (res == E_TIMEOUT) {
        res = readresult(dev, buf);
    }
    if (res == 0) {
        showlevel(buf);
    }

/*
    ret = dev.ctrl_transfer(0xC0,4,0,0,200)
    dB = (ret[0]+((ret[1]&3)*256))*0.1+30
    print dB
    msg="{'dB':'"+str(dB)+"'}"
    try:
        requests.post('https://temporacloud.com/connection/clientSend', data={'streams':streams,'tokens':tokens,'message':msg},verify=False)
    except: None
*/

    hid_close(dev);

    hid_exit();
    return 0;
}


/*

	// Initialize the hidapi library
	res = hid_init();

	// Open the device using the VID, PID,
	// and optionally the Serial number.
	handle = hid_open(0x4d8, 0x3f, NULL);

	// Read the Manufacturer String
	res = hid_get_manufacturer_string(handle, wstr, MAX_STR);
	wprintf(L"Manufacturer String: %s\n", wstr);

	// Read the Product String
	res = hid_get_product_string(handle, wstr, MAX_STR);
	wprintf(L"Product String: %s\n", wstr);

	// Read the Serial Number String
	res = hid_get_serial_number_string(handle, wstr, MAX_STR);
	wprintf(L"Serial Number String: (%d) %s\n", wstr[0], wstr);

	// Read Indexed String 1
	res = hid_get_indexed_string(handle, 1, wstr, MAX_STR);
	wprintf(L"Indexed String 1: %s\n", wstr);

	// Toggle LED (cmd 0x80). The first byte is the report number (0x0).
	buf[0] = 0x0;
	buf[1] = 0x80;
	res = hid_write(handle, buf, 65);

	// Request state (cmd 0x81). The first byte is the report number (0x0).
	buf[0] = 0x0;
	buf[1] = 0x81;
	res = hid_write(handle, buf, 65);

	// Read requested state
	res = hid_read(handle, buf, 65);

	// Print out the returned buffer.
	for (i = 0; i < 4; i++)
		printf("buf[%d]: %d\n", i, buf[i]);

	// Close the device
	hid_close(handle);

	// Finalize the hidapi library
	res = hid_exit();
*/