#include "matrix.h"

#include <stdio.h>
#include <mjson.h>


#define LOGIN_REQUEST_SIZE 1024
#define LOGIN_RESPONSE_SIZE 1024
#define LOGIN_URL "/_matrix/client/v3/login"


bool
MatrixClientInit(
    MatrixClient * client,
    const char * server)
{
    strcpy_s(
        client->server,
        SERVER_SIZE,
        server
    );

    return true;
}

// https://spec.matrix.org/v1.6/client-server-api/#post_matrixclientv3login
bool
MatrixClientLoginPassword(
    MatrixClient * client,
    const char * username,
    const char * password,
    const char * displayName)
{
    static char requestBuffer[LOGIN_REQUEST_SIZE];

    mjson_snprintf(requestBuffer, LOGIN_REQUEST_SIZE,
        "{"
            "\"type\": \"m.login.password\","
            "\"identifier\": {"
                "\"type\": \"m.id.user\","
                "\"user\": \"%s\""
            "},"
            "\"password\": \"%s\","
            "\"initial_device_display_name\": \"%s\""
        "}",
        username,
        password,
        displayName);
    
    static char responseBuffer[LOGIN_RESPONSE_SIZE];
    bool result =
        MatrixHttpPost(client,
            LOGIN_URL,
            requestBuffer,
            responseBuffer, LOGIN_RESPONSE_SIZE);
    
    int responseLen = strlen(responseBuffer);
    
    if (!result)
        return false;

    mjson_get_string(responseBuffer, responseLen,
        "$.access_token",
        client->accessTokenBuffer, ACCESS_TOKEN_SIZE);
    mjson_get_string(responseBuffer, responseLen,
        "$.device_id",
        client->deviceIdBuffer, DEVICE_ID_SIZE);
    mjson_get_string(responseBuffer, responseLen,
        "$.expires_in_ms",
        client->expireMsBuffer, EXPIRE_MS_SIZE);
    mjson_get_string(responseBuffer, responseLen,
        "$.refresh_token",
        client->refreshTokenBuffer, REFRESH_TOKEN_SIZE);

    return true;
}