#include <catch2/catch_test_macros.hpp>
#include <filesystem>

#include "fsfw/cfdp.h"
#include "fsfw/cfdp/CfdpMessage.h"
#include "fsfw/cfdp/handler/PutRequest.h"
#include "fsfw/cfdp/handler/SourceHandler.h"
#include "fsfw/cfdp/pdu/EofPduCreator.h"
#include "fsfw/cfdp/pdu/FileDataCreator.h"
#include "fsfw/cfdp/pdu/MetadataPduCreator.h"
#include "fsfw/cfdp/pdu/MetadataPduReader.h"
#include "fsfw/globalfunctions/arrayprinter.h"
#include "fsfw/storagemanager/StorageManagerIF.h"
#include "fsfw/tmtcservices/TmTcMessage.h"
#include "fsfw/util/SeqCountProvider.h"
#include "mocks/AcceptsTmMock.h"
#include "mocks/EventReportingProxyMock.h"
#include "mocks/FilesystemMock.h"
#include "mocks/MessageQueueMock.h"
#include "mocks/StorageManagerMock.h"
#include "mocks/cfdp/FaultHandlerMock.h"
#include "mocks/cfdp/RemoteConfigTableMock.h"
#include "mocks/cfdp/UserMock.h"

TEST_CASE("CFDP Source Handler", "[cfdp]") {
  using namespace cfdp;
  using namespace returnvalue;
  using namespace std::filesystem;
  MessageQueueId_t destQueueId = 2;
  AcceptsTmMock tmReceiver(destQueueId);
  MessageQueueMock mqMock(destQueueId);
  EntityId localId = EntityId(UnsignedByteField<uint16_t>(2));
  EntityId remoteId = EntityId(UnsignedByteField<uint16_t>(3));
  FaultHandlerMock fhMock;
  LocalEntityCfg localEntityCfg(localId, IndicationCfg(), fhMock);
  FilesystemMock fsMock;
  UserMock userMock(fsMock);
  SeqCountProviderU16 seqCountProvider;
  SourceHandlerParams dp(localEntityCfg, userMock, seqCountProvider);

  EventReportingProxyMock eventReporterMock;
  LocalPool::LocalPoolConfig storeCfg = {{10, 32}, {10, 64}, {10, 128}, {10, 1024}};
  StorageManagerMock tcStore(2, storeCfg);
  StorageManagerMock tmStore(3, storeCfg);
  FsfwParams fp(tmReceiver, &mqMock, &eventReporterMock);
  fp.tcStore = &tcStore;
  fp.tmStore = &tmStore;
  auto sourceHandler = SourceHandler(dp, fp);
  CHECK(sourceHandler.initialize() == OK);

  SECTION("Test Basic") {
    CHECK(sourceHandler.getState() == CfdpState::IDLE);
    CHECK(sourceHandler.getStep() == SourceHandler::TransactionStep::IDLE);
  }

  SECTION("Transfer empty file") {
    RemoteEntityCfg cfg;
    EntityId id(cfdp::WidthInBytes::TWO_BYTES, 5);
    cfg.remoteId = id;
    std::string srcFileName = "/tmp/cfdp-test.txt";
    std::string destFileName = "/tmp/cfdp-test2.txt";
    FilesystemParams srcFileNameFs(srcFileName.c_str());
    fsMock.createFile(srcFileNameFs);
    cfdp::StringLv srcNameLv(srcFileNameFs.path, std::strlen(srcFileNameFs.path));
    FilesystemParams destFileNameFs(destFileName.c_str());
    cfdp::StringLv destNameLv(destFileNameFs.path, std::strlen(destFileNameFs.path));
    PutRequest putRequest(id, srcNameLv, destNameLv);
    CHECK(sourceHandler.transactionStart(putRequest, cfg) == OK);
    SourceHandler::FsmResult& fsmResult = sourceHandler.stateMachine();

    // Verify metadata PDU was sent.
    CHECK(fsmResult.packetsSent == 1);
    CHECK(mqMock.numberOfSentMessages() == 1);
    TmTcMessage tmtcMessage;
    REQUIRE(mqMock.getNextSentMessage(destQueueId, tmtcMessage) == OK);
    auto accessor = tmStore.getData(tmtcMessage.getStorageId());
    REQUIRE(accessor.first == OK);
    const uint8_t* pduPtr = accessor.second.data();
    CHECK(accessor.second.size() == 55);
    MetadataGenericInfo metadataInfo;
    MetadataPduReader metadataReader(pduPtr, accessor.second.size(), metadataInfo, nullptr, 0);
    REQUIRE(metadataReader.parseData() == OK);
    std::string srcNameRead = metadataReader.getSourceFileName().getString();
    CHECK(srcNameRead == srcFileName);
    std::string destNameRead = metadataReader.getDestFileName().getString();
    CHECK(destNameRead == destFileName);
    CHECK(metadataInfo.getChecksumType() == ChecksumType::NULL_CHECKSUM);
    CHECK(metadataInfo.getFileSize().value() == 0);
    CHECK(!metadataInfo.isClosureRequested());

    // Verify EOF PDU was sent. No file data PDU is sent for an empty file.
  }
}