#include "rc_api_user.h"
#include "rc_api_common.h"

#include "../rcheevos/rc_version.h"

#include <string.h>

/* --- Login --- */

int rc_api_init_login_request(rc_api_request_t* request, const rc_api_login_request_t* api_params) {
  rc_api_url_builder_t builder;

  rc_api_url_build_dorequest_url(request);

  if (!api_params->username || !*api_params->username)
    return RC_INVALID_STATE;

  rc_url_builder_init(&builder, &request->buffer, 48);
  rc_url_builder_append_str_param(&builder, "r", "login");
  rc_url_builder_append_str_param(&builder, "u", api_params->username);

  if (api_params->password && api_params->password[0])
    rc_url_builder_append_str_param(&builder, "p", api_params->password);
  else if (api_params->api_token && api_params->api_token[0])
    rc_url_builder_append_str_param(&builder, "t", api_params->api_token);
  else
    return RC_INVALID_STATE;

  request->post_data = rc_url_builder_finalize(&builder);

  return builder.result;
}

int rc_api_process_login_response(rc_api_login_response_t* response, const char* server_response) {
  int result;
  rc_json_field_t fields[] = {
    RC_JSON_NEW_FIELD("Success"),
    RC_JSON_NEW_FIELD("Error"),
    RC_JSON_NEW_FIELD("User"),
    RC_JSON_NEW_FIELD("Token"),
    RC_JSON_NEW_FIELD("Score"),
    RC_JSON_NEW_FIELD("Messages"),
    RC_JSON_NEW_FIELD("DisplayName")
  };

  memset(response, 0, sizeof(*response));
  rc_buf_init(&response->response.buffer);

  result = rc_json_parse_response(&response->response, server_response, fields, sizeof(fields) / sizeof(fields[0]));
  if (result != RC_OK || !response->response.succeeded)
    return result;

  if (!rc_json_get_required_string(&response->username, &response->response, &fields[2], "User"))
    return RC_MISSING_VALUE;
  if (!rc_json_get_required_string(&response->api_token, &response->response, &fields[3], "Token"))
    return RC_MISSING_VALUE;

  rc_json_get_optional_unum(&response->score, &fields[4], "Score", 0);
  rc_json_get_optional_unum(&response->num_unread_messages, &fields[5], "Messages", 0);

  rc_json_get_optional_string(&response->display_name, &response->response, &fields[6], "DisplayName", response->username);

  return RC_OK;
}

void rc_api_destroy_login_response(rc_api_login_response_t* response) {
  rc_buf_destroy(&response->response.buffer);
}

/* --- Start Session --- */

int rc_api_init_start_session_request(rc_api_request_t* request, const rc_api_start_session_request_t* api_params) {
  rc_api_url_builder_t builder;

  rc_api_url_build_dorequest_url(request);

  if (api_params->game_id == 0)
    return RC_INVALID_STATE;

  rc_url_builder_init(&builder, &request->buffer, 48);
  if (rc_api_url_build_dorequest(&builder, "postactivity", api_params->username, api_params->api_token)) {
    /* activity type enum (only 3 is used )
     *  1 = earned achievement - handled by awardachievement
     *  2 = logged in - handled by login
     *  3 = started playing
     *  4 = uploaded achievement - handled by uploadachievement
     *  5 = modified achievement - handled by uploadachievement
     */
    rc_url_builder_append_unum_param(&builder, "a", 3);
    rc_url_builder_append_unum_param(&builder, "m", api_params->game_id);
    rc_url_builder_append_str_param(&builder, "l", RCHEEVOS_VERSION_STRING);
    request->post_data = rc_url_builder_finalize(&builder);
  }

  return builder.result;
}

int rc_api_process_start_session_response(rc_api_start_session_response_t* response, const char* server_response) {
  rc_json_field_t fields[] = {
    RC_JSON_NEW_FIELD("Success"),
    RC_JSON_NEW_FIELD("Error")
  };

  memset(response, 0, sizeof(*response));
  rc_buf_init(&response->response.buffer);

  return rc_json_parse_response(&response->response, server_response, fields, sizeof(fields) / sizeof(fields[0]));
}

void rc_api_destroy_start_session_response(rc_api_start_session_response_t* response) {
  rc_buf_destroy(&response->response.buffer);
}

/* --- Fetch User Unlocks --- */

int rc_api_init_fetch_user_unlocks_request(rc_api_request_t* request, const rc_api_fetch_user_unlocks_request_t* api_params) {
  rc_api_url_builder_t builder;

  rc_api_url_build_dorequest_url(request);

  rc_url_builder_init(&builder, &request->buffer, 48);
  if (rc_api_url_build_dorequest(&builder, "unlocks", api_params->username, api_params->api_token)) {
    rc_url_builder_append_unum_param(&builder, "g", api_params->game_id);
    rc_url_builder_append_unum_param(&builder, "h", api_params->hardcore ? 1 : 0);
    request->post_data = rc_url_builder_finalize(&builder);
  }

  return builder.result;
}

int rc_api_process_fetch_user_unlocks_response(rc_api_fetch_user_unlocks_response_t* response, const char* server_response) {
  int result;
  rc_json_field_t fields[] = {
    RC_JSON_NEW_FIELD("Success"),
    RC_JSON_NEW_FIELD("Error"),
    RC_JSON_NEW_FIELD("UserUnlocks")
    /* unused fields
    RC_JSON_NEW_FIELD("GameID"),
    RC_JSON_NEW_FIELD("HardcoreMode")
     * unused fields */
  };

  memset(response, 0, sizeof(*response));
  rc_buf_init(&response->response.buffer);

  result = rc_json_parse_response(&response->response, server_response, fields, sizeof(fields) / sizeof(fields[0]));
  if (result != RC_OK || !response->response.succeeded)
    return result;

  result = rc_json_get_required_unum_array(&response->achievement_ids, &response->num_achievement_ids, &response->response, &fields[2], "UserUnlocks");
  return result;
}

void rc_api_destroy_fetch_user_unlocks_response(rc_api_fetch_user_unlocks_response_t* response) {
  rc_buf_destroy(&response->response.buffer);
}
