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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>
#include <json-c/json.h>
#include "session.h"
#include "curl_util.h"
#include "util.h"

/* logout: return 1 if success, 0 if failed */
int matrix_logout(matrix_session *sess)
{
	char * requrl = alloc_build_string((const char *[]){
			sess->url,
			"/_matrix/client/r0/logout?access_token=",
			sess->token,
			NULL
			});
	CURLcode res = _curl_post(sess->curl, requrl, "", NULL);
	free(requrl);
	if (res == CURLE_OK)
		return 1;
	else
		return 0;
}

json_object * matrix_joined_rooms(matrix_session *sess)
{
	char requrl[1000];
	json_object *resp;
	sprintf(requrl, "%s/_matrix/client/r0/joined_rooms?access_token=%s",
			  sess->url, sess->token);
	_curl_get(sess->curl, requrl, &resp);
	return resp;
}

const char * matrix_create_room(matrix_session *sess)
{
	char requrl[1000];
	json_object *resp;

	sprintf(requrl, "%s/_matrix/client/r0/createRoom?access_token=%s",
			  sess->url, sess->token);
	_curl_post(sess->curl, requrl, "{\"preset\": \"private_chat\"}", &resp);
	if (resp != NULL) {
		const char *roomid = json_gets(resp, "room_id");
		if (roomid) {
			const char *r = copy_str(roomid);
			json_object_put(resp);
			return r;
		}
	}
	json_object_put(resp);
	return NULL;
}

const char * matrix_resolv_alias(matrix_session *sess, const char *alias)
{
	char requrl[1000];
	json_object *resp;
	const char *_alias = alias;
	if (alias[0] == '#')
		_alias = curl_easy_escape(sess->curl, alias, strlen(alias));

	sprintf(requrl, "%s/_matrix/client/r0/directory/room/%s", sess->url, _alias);
	if (_alias != alias)
		curl_free(_alias);

	_curl_get(sess->curl, requrl, &resp);
	if (resp) {
		const char *roomid = json_gets(resp, "room_id");
		if (roomid) {
			const char *r = copy_str(roomid);
			json_object_put(resp);
			return r;
		}
	}
	json_object_put(resp);
	return NULL;
}

int main()
{
	curl_global_init(CURL_GLOBAL_ALL);
	char url[1000], user[1000], passwd[1000], token[1000];
	scanf("%s%s%s", url, user, passwd);
	matrix_session *sess = matrix_login_pass(url, user, passwd, "Matrix C Client");

	if (sess) {
		printf("hs: %s, mxid: %s, dev: %s, token: %s\n", sess->servername,
				 sess->mxid, sess->dev_id, sess->token);

		/* store access token */
		FILE *fp = fopen("credential.txt", "w");
		fprintf(fp, "%s %s\n", url, sess->token);
		fclose(fp);
	} else {
		puts("login error!\n");
	}

	strcpy(token, sess->token);
	matrix_session_free(sess);

	// scanf("%s%s", url, token);
	sess = matrix_access_token(url, token);
	if (sess) {
		printf("I'm %s\n", sess->mxid);
	} else {
		puts("login error!\n");
	}

	json_object *joined_rooms = matrix_joined_rooms(sess);
	printf("%s\n", json_object_to_json_string(joined_rooms));

	const char *roomid = matrix_resolv_alias(sess, "#hello:my.domain.name");
	if (roomid == NULL)
		puts("fail to resolv #hello:my.domain.name");

	if (roomid) free(roomid);

	/* create a room */
	roomid = matrix_create_room(sess);
	if (roomid == NULL)
		puts("fail to create room!");
	else
		printf("create room %s\n", roomid);

	if (roomid) free(roomid);

	if (matrix_logout(sess))
		puts("logout!");

	if (matrix_whoami(sess)) {
		puts("error: not logged out!");
	}
}