#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

#include "sigar.h"
#include "sigar_fileinfo.h"

typedef sigar_t * Sigar;

/* generated list */
typedef sigar_uptime_t * Sigar__Uptime;
typedef sigar_mem_t * Sigar__Mem;
typedef sigar_proc_cred_t * Sigar__ProcCred;
typedef sigar_proc_fd_t * Sigar__ProcFd;
typedef sigar_dir_stat_t * Sigar__DirStat;
typedef sigar_proc_cred_name_t * Sigar__ProcCredName;
typedef sigar_file_attrs_t * Sigar__FileAttrs;
typedef sigar_cpu_t * Sigar__Cpu;
typedef sigar_cpu_info_t * Sigar__CpuInfo;
typedef sigar_net_interface_config_t * Sigar__NetInterfaceConfig;
typedef sigar_swap_t * Sigar__Swap;
typedef sigar_proc_state_t * Sigar__ProcState;
typedef sigar_net_connection_t * Sigar__NetConnection;
typedef sigar_proc_exe_t * Sigar__ProcExe;
typedef sigar_proc_time_t * Sigar__ProcTime;
typedef sigar_proc_mem_t * Sigar__ProcMem;
typedef sigar_file_system_t * Sigar__FileSystem;
typedef sigar_file_system_usage_t * Sigar__FileSystemUsage;
typedef sigar_proc_stat_t * Sigar__ProcStat;
typedef sigar_net_route_t * Sigar__NetRoute;
typedef sigar_net_interface_stat_t * Sigar__NetInterfaceStat;

/* Perl < 5.6 */
#ifndef aTHX_
#define aTHX_
#endif

#define SIGAR_CROAK(sigar, msg) \
    Perl_croak(aTHX_ msg " %s", sigar_strerror(sigar, status))

static SV *convert_2svav(char *data, unsigned long number,
                         int size, const char *classname)
{
    AV *av = newAV();
    unsigned long i;

    for (i=0; i<number; i++, data += size) {
        SV *sv = newSV(0);
        void *ent = safemalloc(size);

        memcpy(ent, data, size);
        sv_setref_pv(sv, classname, ent);
        av_push(av, sv);
    }

    return newRV_noinc((SV*)av);
}

static SV *convert_2strav(char **data, unsigned long number)
{
    unsigned long i;
    AV *av = newAV();

    av_extend(av, number - 1);

    for (i=0; i<number; i++) {
        av_push(av, newSVpv(data[i], 0));
    }

    return newRV_noinc((SV*)av);
}

static int proc_env_getall(void *data,
                           const char *key, int klen,
                           char *val, int vlen)
{
    HV *hv = (HV*)data;
    hv_store(hv, key, klen, newSVpv(val, vlen), 0);
    return SIGAR_OK;
}

typedef struct {
    char *key;
    int klen;
    SV *val;
} env_getvalue_t;

static int proc_env_getvalue(void *data,
                             const char *key, int klen,
                             char *val, int vlen)
{
    env_getvalue_t *get = (env_getvalue_t *)data;

    if ((get->klen == klen) &&
        (strEQ(get->key, key)))
    {
        get->val = newSVpv(val, vlen);
        return !SIGAR_OK; /* foundit; stop iterating */
    }

    return SIGAR_OK;
}

MODULE = Sigar   PACKAGE = Sigar

PROTOTYPES: disable

INCLUDE: Sigar_generated.xs

MODULE = Sigar   PACKAGE = Sigar   PREFIX = sigar_

Sigar
new(classname)
    char *classname

    PREINIT:
    int status;

    CODE:
    if ((status = sigar_open(&RETVAL)) != SIGAR_OK) {
        classname = classname; /* -Wall */
        SIGAR_CROAK(RETVAL, "open");
    }

    OUTPUT:
    RETVAL

void
DESTROY(sigar)
    Sigar sigar

    CODE:
    (void)sigar_close(sigar);

char *
sigar_fqdn(sigar)
    Sigar sigar

    PREINIT:
    char fqdn[SIGAR_FQDN_LEN];

    CODE:
    sigar_fqdn_get(sigar, fqdn, sizeof(fqdn));
    RETVAL = fqdn;

    OUTPUT:
    RETVAL

SV *
loadavg(sigar)
    Sigar sigar

    PREINIT:
    sigar_loadavg_t loadavg;
    int status;
    unsigned long i;
    AV *av;

    CODE:
    status = sigar_loadavg_get(sigar, &loadavg);

    if (status != SIGAR_OK) {
        SIGAR_CROAK(sigar, "loadavg");
    }

    av = newAV();
    av_extend(av, 2);

    for (i=0; i<3; i++) {
        av_push(av, newSVnv(loadavg.loadavg[i]));
    }

    RETVAL = newRV_noinc((SV*)av);

    OUTPUT:
    RETVAL

SV *
file_system_list(sigar)
    Sigar sigar

    PREINIT:
    sigar_file_system_list_t fslist;
    int status;

    CODE:
    status = sigar_file_system_list_get(sigar, &fslist);

    if (status != SIGAR_OK) {
        SIGAR_CROAK(sigar, "fslist");
    }

    RETVAL = convert_2svav((char *)&fslist.data[0],
                           fslist.number,
                           sizeof(*fslist.data),
                           "Sigar::FileSystem");

    sigar_file_system_list_destroy(sigar, &fslist);

    OUTPUT:
    RETVAL

SV *
cpu_infos(sigar)
    Sigar sigar

    PREINIT:
    sigar_cpu_infos_t cpu_infos;
    int status;

    CODE:
    status = sigar_cpu_infos_get(sigar, &cpu_infos);

    if (status != SIGAR_OK) {
        SIGAR_CROAK(sigar, "cpu_infos");
    }

    RETVAL = convert_2svav((char *)&cpu_infos.data[0],
                           cpu_infos.number,
                           sizeof(*cpu_infos.data),
                           "Sigar::CpuInfo");

    sigar_cpu_infos_destroy(sigar, &cpu_infos);

    OUTPUT:
    RETVAL

SV *
proc_list(sigar)
    Sigar sigar

    PREINIT:
    sigar_proc_list_t proclist;
    int status;
    unsigned long i;
    AV *av;

    CODE:
    status = sigar_proc_list_get(sigar, &proclist);

    if (status != SIGAR_OK) {
        SIGAR_CROAK(sigar, "proc_list");
    }

    av = newAV();
    av_extend(av, proclist.number - 1);

    for (i=0; i<proclist.number; i++) {
        av_push(av, newSViv(proclist.data[i]));
    }

    RETVAL = newRV_noinc((SV*)av);

    sigar_proc_list_destroy(sigar, &proclist);

    OUTPUT:
    RETVAL

SV *
proc_args(sigar, pid)
    Sigar sigar
    sigar_pid_t pid

    PREINIT:
    sigar_proc_args_t procargs;
    int status;

    CODE:
    status = sigar_proc_args_get(sigar, pid, &procargs);

    if (status != SIGAR_OK) {
        SIGAR_CROAK(sigar, "proc_args");
    }

    RETVAL = convert_2strav(procargs.data, procargs.number);

    sigar_proc_args_destroy(sigar, &procargs);

    OUTPUT:
    RETVAL

SV *
proc_env(sigar, pid, key=NULL)
    Sigar sigar
    sigar_pid_t pid
    SV *key;

    PREINIT:
    env_getvalue_t get;
    sigar_proc_env_t procenv;
    int status;
    HV *hv = Nullhv;

    CODE:
    if (key == NULL) {
        procenv.type = SIGAR_PROC_ENV_ALL;
        procenv.env_getter = proc_env_getall;
        procenv.data = hv = newHV();
    }
    else {
        procenv.type = SIGAR_PROC_ENV_KEY;
        procenv.env_getter = proc_env_getvalue;
        procenv.data = &get;
        get.val = &PL_sv_undef;
        get.key = SvPV(key, get.klen);
        procenv.key = get.key;
        procenv.klen = get.klen;
    }

    status = sigar_proc_env_get(sigar, pid, &procenv);

    if (status != SIGAR_OK) {
        if (hv) {
            SvREFCNT_dec((SV*)hv);
        }
        SIGAR_CROAK(sigar, "proc_env");
    }

    if (key == NULL) {
        RETVAL = newRV_noinc((SV*)hv);
    }
    else {
        RETVAL = get.val;
    }

    OUTPUT:
    RETVAL

SV *
net_interface_list(sigar)
    Sigar sigar

    PREINIT:
    sigar_net_interface_list_t iflist;
    int status;

    CODE:
    status = sigar_net_interface_list_get(sigar, &iflist);

    if (status != SIGAR_OK) {
        SIGAR_CROAK(sigar, "net_interface_list");
    }

    RETVAL = convert_2strav(iflist.data, iflist.number);

    sigar_net_interface_list_destroy(sigar, &iflist);

    OUTPUT:
    RETVAL