#include "AFBClient.h"

#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>

#define UNUSED(x) (void)(x)

extern "C" {
extern struct afb_wsj1 *afb_ws_client_connect_wsj1(struct sd_event *eloop, const char *uri, struct afb_wsj1_itf *itf, void *closure);
extern int afb_wsj1_call_s(struct afb_wsj1 *wsj1, const char *api, const char *verb, const char *object, void (*on_reply)(void *closure, struct afb_wsj1_msg *msg), void *closure);
extern int afb_wsj1_msg_is_reply_ok(struct afb_wsj1_msg *msg);
extern int afb_wsj1_send_event_s(struct afb_wsj1 *wsj1, const char *event, const char *object);
static inline int afb_wsj1_reply_error_s(struct afb_wsj1_msg *msg, const char *object, const char *token);
}

const char * AFBClient::wmURI = "ws://localhost:1700/api?token=wm";
const char * AFBClient::wmAPI = "winman";

AFBClient::AFBClient() : itf()
{
    ///* itinializing the callback interface for wsj1 */
    itf.on_hangup = AFBClient::onHangup;
    itf.on_call = AFBClient::onCall;
    itf.on_event = AFBClient::onEvent;
}

AFBClient::~AFBClient()
{
}

bool AFBClient::init()
{
    printf("init() -->\n");
    /* get the default event loop */
    int rc = sd_event_default(&loop);
    if (rc < 0) {
        fprintf(stderr, "Connection to default event loop failed: %s\n", strerror(-rc));
        return false;
    }

#ifdef AFB
    /* connect the websocket wsj1 to the uri given by the first argument */
    wsj1 = afb_ws_client_connect_wsj1(loop, wmURI, &itf, NULL);
    if (wsj1 == NULL) {
        fprintf(stderr, "Connection to %s failed: %m\n", wmURI);
        return false;
    }
#endif

    printf("init() <--\n");
    return true;
}

void AFBClient::requestSurface(const char *label)
{
    printf("requestSurface(%s) -->\n", label);
    fflush(stdout);

    static int num = 0;
    char *key;
    int rc;
    const char begin[] = "{\"drawing_name\":\"";
    const char end[] = "\"}";
    const char verb[] = "request_surface";
    char *parameter = (char *)malloc(strlen(begin) +
                                     strlen(label) +
                                     strlen(end) + 1);
    strcpy(parameter, begin);
    strcat(parameter, label);
    strcat(parameter, end);

    /* allocates an id for the request */
    rc = asprintf(&key, "%d:%s/%s", ++num, AFBClient::wmAPI, verb);

    /* send the request */
    rc = afb_wsj1_call_s(wsj1, AFBClient::wmAPI, verb, parameter, AFBClient::onRequestSurfaceReply, key);
    if (rc < 0)
        fprintf(stderr, "calling %s/%s(%s) failed: %m\n", AFBClient::wmAPI, verb, parameter);

    printf("requestSurface(%s) <--\n", label);
    fflush(stdout);
}

void AFBClient::activateSurface(const char *label)
{
    printf("activateSurface(%s) -->\n", label);
    fflush(stdout);

    const char begin[] = "{\"drawing_name\":\"";
    const char end[] = "\"}";
    const char verb[] = "activate_surface";
    char *parameter = (char *)malloc(strlen(begin) +
                                     strlen(label) +
                                     strlen(end) + 1);
    strcpy(parameter, begin);
    strcat(parameter, label);
    strcat(parameter, end);
    call(AFBClient::wmAPI, verb, parameter);

    printf("activateSurface(%s) <--\n", label);
    fflush(stdout);
}

void AFBClient::deactivateSurface(const char *label)
{
    UNUSED(label);
}

void AFBClient::endDraw(const char *label)
{
    UNUSED(label);
}

/* called when wsj1 receives a method invocation */
void AFBClient::onCall(void *closure, const char *api, const char *verb, struct afb_wsj1_msg *msg)
{
#ifdef AFB
    UNUSED(closure);
    int rc;
    printf("ON-CALL %s/%s:\n%s\n", api, verb,
           json_object_to_json_string_ext(afb_wsj1_msg_object_j(msg),
                                          JSON_C_TO_STRING_PRETTY));
    fflush(stdout);
    rc = afb_wsj1_reply_error_s(msg, "\"unimplemented\"", NULL);
    if (rc < 0)
        fprintf(stderr, "replying failed: %m\n");
#endif
}

/* called when wsj1 receives an event */
void AFBClient::onEvent(void *closure, const char *event, afb_wsj1_msg *msg)
{
#ifdef AFB
    UNUSED(closure);
    printf("ON-EVENT %s:\n%s\n", event,
           json_object_to_json_string_ext(afb_wsj1_msg_object_j(msg),
                                          JSON_C_TO_STRING_PRETTY));
    fflush(stdout);
#endif
}

/* called when wsj1 hangsup */
void AFBClient::onHangup(void *closure, afb_wsj1 *wsj1)
{
    UNUSED(closure);
    UNUSED(wsj1);
    printf("ON-HANGUP\n");
    fflush(stdout);
    exit(0);
}

/* called when wsj1 receives a reply */
void AFBClient::onReply(void *closure, afb_wsj1_msg *msg)
{
#ifdef AFB
    printf("ON-REPLY %s: %s\n%s\n", (char*)closure,
           afb_wsj1_msg_is_reply_ok(msg) ? "OK" : "ERROR",
           json_object_to_json_string_ext(afb_wsj1_msg_object_j(msg),
                                          JSON_C_TO_STRING_PRETTY));
    fflush(stdout);
    free(closure);
#endif
}

void AFBClient::onRequestSurfaceReply(void *closure, afb_wsj1_msg *msg)
{
#ifdef AFB
    printf("onRequestSurfaceReply %s: %s\n%s\n", (char*)closure,
           afb_wsj1_msg_is_reply_ok(msg) ? "OK" : "ERROR",
           json_object_to_json_string_ext(afb_wsj1_msg_object_j(msg),
                                          JSON_C_TO_STRING_PRETTY));
    printf("\n\n===>RETURN STR: %s\n\n", afb_wsj1_msg_object_s(msg));
    //    putenv("QT_IVI_SURFACE_ID=16778219");
    fflush(stdout);
    free(closure);
#endif
}

/* makes a call */
void AFBClient::call(const char *api, const char *verb, const char *object)
{
#ifdef AFB
    static int num = 0;
    char *key;
    int rc;

    printf("call(%s, %s, %s) -->\n", api, verb, object);
    fflush(stdout);

    /* allocates an id for the request */
    rc = asprintf(&key, "%d:%s/%s", ++num, api, verb);

    /* send the request */
    rc = afb_wsj1_call_s(wsj1, api, verb, object, AFBClient::onReply, key);
    if (rc < 0)
        fprintf(stderr, "calling %s/%s(%s) failed: %m\n", api, verb, object);

    printf("call(%s, %s, %s) <--\n", api, verb, object);
    fflush(stdout);
#endif
}

/* sends an event */
void AFBClient::event(const char *event, const char *object)
{
#ifdef AFB
    int rc;

    rc = afb_wsj1_send_event_s(wsj1, event, object);
    if (rc < 0)
        fprintf(stderr, "sending !%s(%s) failed: %m\n", event, object);
#endif
}