#include <stdio.h>
#include <stdlib.h>

#include "libpaddle_pserver_cclient.h"

// TODO(helin): Fix: gtest using cmake is not working, using this
// hacky way for now.
#define fail()                                          \
  fprintf(stderr, "info: %s:%d: ", __FILE__, __LINE__); \
  exit(-1);

void sendGrads(paddle_pserver_client c) {
  unsigned char grad_a[2000] = {2};
  unsigned char grad_b[3000] = {3};
  paddle_gradient grad1 = {
      "param_a", PADDLE_ELEMENT_TYPE_FLOAT32, grad_a, 2000};
  paddle_gradient grad2 = {
      "param_b", PADDLE_ELEMENT_TYPE_FLOAT32, grad_b, 3000};
  paddle_gradient *grads[2] = {&grad1, &grad2};
  if (paddle_send_grads(c, grads, 2)) {
    fail();
  }
}

void getParams(paddle_pserver_client c) {
  paddle_parameter param_a;
  paddle_parameter param_b;
  char name_a[] = "param_a";
  char name_b[] = "param_b";
  // Must pre-allocate the prameter content before calling paddle_get_params.
  unsigned char content_a[2000] = {};
  unsigned char content_b[3000] = {};
  param_a.element_type = PADDLE_ELEMENT_TYPE_FLOAT32;
  param_a.name = name_a;
  param_a.content = content_a;
  param_a.content_len = 2000;
  param_b.element_type = PADDLE_ELEMENT_TYPE_FLOAT32;
  param_b.name = name_b;
  param_b.content = content_b;
  param_b.content_len = 3000;

  paddle_parameter *params[2] = {&param_a, &param_b};
  if (paddle_get_params(c, params, 2)) {
    fail();
  }
}

int main() {
  char addr[] = "localhost:3000";
  paddle_pserver_client c = paddle_new_pserver_client(addr, 1);
  char *config_proto;
  size_t config_proto_len = 0;
  ssize_t nread;
  FILE *fp = fopen("testdata/optimizer.pb", "r");
  if (!fp) {
    fail();
  }
  while ((nread = getline(&config_proto, &config_proto_len, fp)) != -1) {
    printf("%s", config_proto);
  }
  fclose(fp);
retry:
  if (paddle_begin_init_params(c)) {
    paddle_parameter param;
    char name_a[] = "param_a";
    char name_b[] = "param_b";
    unsigned char content_a[2000] = {1};
    unsigned char content_b[3000] = {0};
    param.element_type = PADDLE_ELEMENT_TYPE_FLOAT32;
    param.name = name_a;
    param.content = content_a;
    param.content_len = 2000;
    int error =
        paddle_init_param(c, param, (void *)config_proto, config_proto_len);
    if (error != 0) {
      goto retry;
    }

    param.element_type = PADDLE_ELEMENT_TYPE_FLOAT32;
    param.name = name_b;
    param.content = content_b;
    param.content_len = 3000;
    error = paddle_init_param(c, param, (void *)config_proto, config_proto_len);
    if (error != 0) {
      goto retry;
    }

    error = paddle_finish_init_params(c);
    if (error != 0) {
      goto retry;
    }
  }

  int i;
  for (i = 0; i < 100; i++) {
    sendGrads(c);
    getParams(c);
  }

  if (paddle_save_model(c, "/tmp/")) {
    fail();
  }

  return 0;
}
