#include "responses.h"

#define srv conn->server
#define LOGGER srv->logger
#define LOG_FUNC srv->log_func
#define LOG_CONTEXT log_ctx

declare_RequestHandler(SendMessage)
{
    Deferral(4);
    logInfo("requested %s", req_type_name);
    
    // receive request
    SendMessageRequest req;
    try_void(PacketHeader_validateContentSize(req_head, sizeof(req)));
    try_void(EncryptedSocketTCP_recvStruct(&conn->sock, &req));
    
    if(!conn->authorized){
        try_void(sendErrorMessage(log_ctx, conn, res_head,
            LogSeverity_Warn, STR("not authorized") ));
        Return RESULT_VOID;
    }

    // validate content size
    if(req.data_size < MESSAGE_SIZE_MIN || req.data_size > MESSAGE_SIZE_MAX){
        try_void(sendErrorMessage(log_ctx, conn, res_head,
            LogSeverity_Warn, STR("invalid message size") ));
        // close socket connection to reject incoming data
        Return RESULT_ERROR_CODE_FMT(TcpChat, TcpChatError_RejectIncoming, "invalid message size: %u", req.data_size);
    }
    
    // receive message data
    try_void(EncryptedSocketTCP_recv(&conn->sock, conn->message_content, SocketRecvFlag_WholeBuffer));
    
    // validate channel id
    try(bool channel_exists, i, Channel_exists(conn->queries.common, req.channel_id));
    if(!channel_exists){
        try_void(sendErrorMessage(log_ctx, conn, res_head,
            LogSeverity_Warn, STR("invalid channel id") ));
        Return RESULT_VOID;
    }

    // save message to channel
    DateTime timestamp;
    try(i64 message_id, i, Channel_saveMessage(conn->queries.common,
        req.channel_id, conn->user_id, conn->message_content, 
        &timestamp));

    // send response
    SendMessageResponse res;
    SendMessageResponse_construct(&res, res_head, 
        message_id, timestamp);
    try_void(EncryptedSocketTCP_sendStruct(&conn->sock, res_head));
    try_void(EncryptedSocketTCP_sendStruct(&conn->sock, &res));

    Return RESULT_VOID;
}