// vim:ts=4:sw=4:expandtab
#include <config.h>
#include <stdlib.h>
#include <limits.h>
#include <glob.h>
#include <stdio.h>
#include <string.h>
#include <yajl/yajl_gen.h>
#include <yajl/yajl_version.h>

#include "i3status.h"

#define STRING_SIZE 20

#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#include <err.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#define TZ_ZEROC 2731
#define TZ_KELVTOC(x) (((x)-TZ_ZEROC) / 10), abs(((x)-TZ_ZEROC) % 10)
#define TZ_AVG(x) ((x)-TZ_ZEROC) / 10
#endif

#if defined(__DragonFly__)
#include <sys/sysctl.h>
#include <sys/types.h>
#include <sys/sensors.h>
#define MUKTOC(v) ((v - 273150000) / 1000000.0)
#endif

#if defined(__OpenBSD__)
#include <sys/param.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/sensors.h>
#include <errno.h>
#include <err.h>

#define MUKTOC(v) ((v - 273150000) / 1000000.0)
#endif

#if defined(__NetBSD__)
#include <fcntl.h>
#include <prop/proplib.h>
#include <sys/envsys.h>

#define MUKTOC(v) ((v - 273150000) / 1000000.0)
#endif

typedef struct temperature_s {
    double raw_value;
    char formatted_value[20];
} temperature_t;

#define ERROR_CODE 1

static int read_temperature(char *thermal_zone, temperature_t *temperature) {
#if defined(__linux__)
    static char buf[16];
    long int temp;

    if (!slurp(thermal_zone, buf, sizeof(buf)))
        return ERROR_CODE;

    temp = strtol(buf, NULL, 10);
    temperature->raw_value = temp / 1000;

    if (temp == LONG_MIN || temp == LONG_MAX || temp <= 0)
        strcpy(temperature->formatted_value, "?");
    else
        sprintf(temperature->formatted_value, "%ld", (temp / 1000));

#elif defined(__DragonFly__)
    struct sensor th_sensor;
    size_t th_sensorlen;

    th_sensorlen = sizeof(th_sensor);

    if (sysctlbyname(thermal_zone, &th_sensor, &th_sensorlen, NULL, 0) == -1) {
        perror("sysctlbyname");
        return ERROR_CODE;
    }

    temperature->raw_value = MUKTOC(th_sensor.value);
    sprintf(temperature->formatted_value, "%.2f", MUKTOC(th_sensor.value));

#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
    int sysctl_rslt;
    size_t sysctl_size = sizeof(sysctl_rslt);

    if (sysctlbyname(thermal_zone, &sysctl_rslt, &sysctl_size, NULL, 0))
        return ERROR_CODE;

    temperature->raw_value = TZ_AVG(sysctl_rslt);
    sprintf(temperature->formatted_value, "%d.%d", TZ_KELVTOC(sysctl_rslt));

#elif defined(__OpenBSD__)
    struct sensordev sensordev;
    struct sensor sensor;
    size_t sdlen, slen;
    int dev, numt, mib[5] = {CTL_HW, HW_SENSORS, 0, 0, 0};

    sdlen = sizeof(sensordev);
    slen = sizeof(sensor);

    for (dev = 0;; dev++) {
        mib[2] = dev;
        if (sysctl(mib, 3, &sensordev, &sdlen, NULL, 0) == -1) {
            if (errno == ENXIO)
                continue;
            if (errno == ENOENT)
                break;
            return ERROR_CODE;
        }
        /* 'path' is the node within the full path (defaults to acpitz0). */
        if (BEGINS_WITH(sensordev.xname, thermal_zone)) {
            mib[3] = SENSOR_TEMP;
            /* Limit to temp0, but should retrieve from a full path... */
            for (numt = 0; numt < 1 /*sensordev.maxnumt[SENSOR_TEMP]*/; numt++) {
                mib[4] = numt;
                if (sysctl(mib, 5, &sensor, &slen, NULL, 0) == -1) {
                    if (errno != ENOENT) {
                        warn("sysctl");
                        continue;
                    }
                }
                temperature->raw_value = MUKTOC(sensor.value);
                sprintf(temperature->formatted_value, "%.2f", MUKTOC(sensor.value));
            }
        }
    }
#elif defined(__NetBSD__)
    int fd, rval;
    bool err = false;
    prop_dictionary_t dict;
    prop_array_t array;
    prop_object_iterator_t iter;
    prop_object_iterator_t iter2;
    prop_object_t obj, obj2, obj3;

    fd = open("/dev/sysmon", O_RDONLY);
    if (fd == -1)
        return ERROR_CODE;

    rval = prop_dictionary_recv_ioctl(fd, ENVSYS_GETDICTIONARY, &dict);
    if (rval == -1) {
        err = true;
        goto error_netbsd1;
    }

    /* No drivers registered? */
    if (prop_dictionary_count(dict) == 0) {
        err = true;
        goto error_netbsd2;
    }

    iter = prop_dictionary_iterator(dict);
    if (iter == NULL) {
        err = true;
        goto error_netbsd2;
    }

    /* iterate over the dictionary returned by the kernel */
    while ((obj = prop_object_iterator_next(iter)) != NULL) {
        /* skip this dict if it's not what we're looking for */
        if ((strlen(prop_dictionary_keysym_cstring_nocopy(obj)) != strlen(thermal_zone)) ||
            (strncmp(thermal_zone,
                     prop_dictionary_keysym_cstring_nocopy(obj),
                     strlen(thermal_zone)) != 0))
            continue;

        array = prop_dictionary_get_keysym(dict, obj);
        if (prop_object_type(array) != PROP_TYPE_ARRAY) {
            err = true;
            goto error_netbsd3;
        }

        iter2 = prop_array_iterator(array);
        if (!iter2) {
            err = true;
            goto error_netbsd3;
        }

        /* iterate over array of dicts specific to target sensor */
        while ((obj2 = prop_object_iterator_next(iter2)) != NULL) {
            obj3 = prop_dictionary_get(obj2, "cur-value");

            float temp = MUKTOC(prop_number_integer_value(obj3));
            temperature->raw_value = temp;
            sprintf(temperature->formatted_value, "%.2f", temp);

            break;
        }
        prop_object_iterator_release(iter2);
    }
error_netbsd3:
    prop_object_iterator_release(iter);
error_netbsd2:
    prop_object_release(dict);
error_netbsd1:
    close(fd);
    if (err)
        return ERROR_CODE;

#endif
    return 0;
}

/*
 * Reads the CPU temperature from /sys/class/thermal/thermal_zone%d/temp (or
 * the user provided path) and returns the temperature in degree celsius.
 *
 */
void print_cpu_temperature_info(yajl_gen json_gen, char *buffer, int zone, const char *path, const char *format, const char *format_above_threshold, int max_threshold) {
    char *outwalk = buffer;
#ifdef THERMAL_ZONE
    const char *selected_format = format;
    bool colorful_output = false;
    char *thermal_zone;
    temperature_t temperature;
    temperature.raw_value = 0;
    sprintf(temperature.formatted_value, "%.2f", 0.0);

    if (path == NULL)
        asprintf(&thermal_zone, THERMAL_ZONE, zone);
    else {
        static glob_t globbuf;
        if (glob(path, GLOB_NOCHECK | GLOB_TILDE, NULL, &globbuf) != 0)
            die("glob() failed\n");
        if (globbuf.gl_pathc == 0) {
            /* No glob matches, the specified path does not contain a wildcard. */
            asprintf(&thermal_zone, path, zone);
        } else {
            /* glob matched, we take the first match and ignore the others */
            asprintf(&thermal_zone, "%s", globbuf.gl_pathv[0]);
        }
        globfree(&globbuf);
    }

    INSTANCE(thermal_zone);

    if (read_temperature(thermal_zone, &temperature) != 0)
        goto error;

    if (temperature.raw_value >= max_threshold) {
        START_COLOR("color_bad");
        colorful_output = true;
        if (format_above_threshold != NULL)
            selected_format = format_above_threshold;
    }

    char string_degrees[STRING_SIZE];
    snprintf(string_degrees, STRING_SIZE, "%s", temperature.formatted_value);
    placeholder_t placeholders[] = {
        {.name = "%degrees", .value = string_degrees}};

    const size_t num = sizeof(placeholders) / sizeof(placeholder_t);
    buffer = format_placeholders(selected_format, &placeholders[0], num);

    if (colorful_output) {
        END_COLOR;
        colorful_output = false;
    }

    free(thermal_zone);

    OUTPUT_FULL_TEXT(buffer);
    free(buffer);
    return;
error:
    free(thermal_zone);
#endif

    OUTPUT_FULL_TEXT("can't read temp");
    (void)fputs("i3status: Cannot read temperature. Verify that you have a thermal zone in /sys/class/thermal or disable the cpu_temperature module in your i3status config.\n", stderr);
}