#include "MLVL.hpp"
#include "SCLY.hpp"
#include "SAVW.hpp"
#include "SCAN.hpp"
#include "ScriptObjects/MemoryRelay.hpp"
#include "ScriptObjects/SpecialFunction.hpp"
#include "ScriptObjects/DoorArea.hpp"
#include "Runtime/RetroTypes.hpp"
#include "Runtime/World/ScriptObjectSupport.hpp"
#include "hecl/Blender/Connection.hpp"

namespace DataSpec {
extern hecl::Database::DataSpecEntry SpecEntMP1;

namespace DNAMP1 {

bool MLVL::Extract(const SpecBase& dataSpec, PAKEntryReadStream& rs, const hecl::ProjectPath& outPath,
                   PAKRouter<PAKBridge>& pakRouter, const PAK::Entry& entry, bool force, hecl::blender::Token& btok,
                   std::function<void(const hecl::SystemChar*)> fileChanged) {
  MLVL mlvl;
  mlvl.read(rs);
  const nod::Node* node;
  const typename PAKRouter<PAKBridge>::EntryType* savwEntry = pakRouter.lookupEntry(mlvl.saveWorldId, &node);
  SAVW savw;
  {
    PAKEntryReadStream rs = savwEntry->beginReadStream(*node);
    savw.read(rs);
  }

  atUint32 areaIdx = 0;
  for (const MLVL::Area& area : mlvl.areas) {
    hecl::ProjectPath areaDir = pakRouter.getWorking(area.areaMREAId).getParentPath();
    {
      athena::io::FileWriter fw(hecl::ProjectPath(areaDir, _SYS_STR("!memoryid.yaml")).getAbsolutePath());
      athena::io::YAMLDocWriter w;
      w.writeUint32("memoryid", area.areaId);
      w.finish(&fw);
    }
    {
      athena::io::FileWriter fw(hecl::ProjectPath(areaDir, _SYS_STR("!memoryrelays.yaml")).getAbsolutePath());
      athena::io::YAMLDocWriter w;

      std::vector<atUint32> relayIds;
      for (const atUint32& relay : savw.relays) {
        atUint16 aIdx = ((relay >> 16) & 0x3ff);
        if (aIdx == areaIdx && std::find(relayIds.begin(), relayIds.end(), relay) == relayIds.end())
          relayIds.push_back(relay);
      }

      w.enumerate<atUint32>("memrelays", relayIds);
      w.finish(&fw);
    }
    if (pakRouter.mreaHasDupeResources(area.areaMREAId))
      athena::io::FileWriter(hecl::ProjectPath(areaDir, _SYS_STR("!duperes")).getAbsolutePath());

    areaIdx++;
  }

  athena::io::FileWriter writer(outPath.getWithExtension(_SYS_STR(".yaml"), true).getAbsolutePath());
  athena::io::ToYAMLStream(mlvl, writer, &MLVL::writeMeta);
  hecl::blender::Connection& conn = btok.getBlenderConnection();
  return DNAMLVL::ReadMLVLToBlender(conn, mlvl, outPath, pakRouter, entry, force, fileChanged);
}

bool MLVL::ExtractMAPW(PAKEntryReadStream& rs, const hecl::ProjectPath& outPath) {
  /* Empty placeholder file for dependency management */
  athena::io::FileWriter writer(outPath.getAbsolutePath());
  athena::io::YAMLDocWriter dw("DataSpec::DNAMP1::MAPW");
  return dw.finish(&writer);
}

bool MLVL::ExtractSAVW(PAKEntryReadStream& rs, const hecl::ProjectPath& outPath) {
  /* Empty placeholder file for dependency management */
  athena::io::FileWriter writer(outPath.getAbsolutePath());
  athena::io::YAMLDocWriter dw("DataSpec::DNAMP1::SAVW");
  return dw.finish(&writer);
}

struct LayerResources {
  std::unordered_set<hecl::Hash> addedPaths;
  std::vector<std::vector<std::pair<hecl::ProjectPath, bool>>> layerPaths;
  std::unordered_set<hecl::Hash> addedSharedPaths;
  std::vector<std::pair<hecl::ProjectPath, bool>> sharedPaths;
  void beginLayer() {
    layerPaths.resize(layerPaths.size() + 1);
    addedPaths.clear();
  }
  void addSharedPath(const hecl::ProjectPath& path, bool lazy) {
    auto search = addedSharedPaths.find(path.hash());
    if (search == addedSharedPaths.cend()) {
      sharedPaths.emplace_back(path, lazy);
      addedSharedPaths.insert(path.hash());
    }
  }
  void addPath(const hecl::ProjectPath& path, bool lazy) {
    auto search = addedPaths.find(path.hash());
    if (search == addedPaths.cend()) {
      layerPaths.back().emplace_back(path, lazy);
      addedPaths.insert(path.hash());
    }
  }
};

bool MLVL::Cook(const hecl::ProjectPath& outPath, const hecl::ProjectPath& inPath, const World& wld,
                hecl::blender::Token& btok) {
  MLVL mlvl = {};
  athena::io::FileReader reader(inPath.getWithExtension(_SYS_STR(".yaml"), true).getAbsolutePath());
  athena::io::FromYAMLStream(mlvl, reader, &MLVL::readMeta);

  const hecl::ProjectPath parentPath = inPath.getParentPath();
  const hecl::DirectoryEnumerator dEnum(parentPath.getAbsolutePath());

  mlvl.magic = 0xDEAFBABE;
  mlvl.version = 0x11;
  hecl::ProjectPath namePath = GetPathBeginsWith(dEnum, parentPath, _SYS_STR("!name_"));
  if (namePath.isFile())
    mlvl.worldNameId = namePath;
  hecl::ProjectPath savwPath = GetPathBeginsWith(dEnum, parentPath, _SYS_STR("!savw_"));
  if (savwPath.isFile()) {
    CookSAVW(savwPath.getCookedPath(SpecEntMP1), wld);
    mlvl.saveWorldId = savwPath;
  }
  hecl::ProjectPath mapwPath = GetPathBeginsWith(dEnum, parentPath, _SYS_STR("!mapw_"));
  if (mapwPath.isFile()) {
    CookMAPW(mapwPath.getCookedPath(SpecEntMP1), wld);
    mlvl.worldMap = mapwPath;
  }

  size_t areaIdx = 0;
  size_t nameOffset = 0;
  for (const World::Area& area : wld.areas) {
    if (area.path.getPathType() != hecl::ProjectPath::Type::Directory)
      continue;

    const hecl::DirectoryEnumerator areaDEnum(area.path.getAbsolutePath());
    const hecl::ProjectPath areaPath = GetPathBeginsWith(areaDEnum, area.path, _SYS_STR("!area_"));
    if (!areaPath.isFile())
      continue;

    Log.report(logvisor::Info, FMT_STRING(_SYS_STR("Visiting {}")), area.path.getRelativePath());

    hecl::ProjectPath memRelayPath(area.path, _SYS_STR("!memoryrelays.yaml"));

    std::vector<atUint32> memRelays;

    if (memRelayPath.isFile()) {
      athena::io::FileReader fr(memRelayPath.getAbsolutePath());
      athena::io::YAMLDocReader r;
      if (r.parse(&fr))
        r.enumerate<atUint32>("memrelays", memRelays);
    }

    std::vector<MemRelayLink> memRelayLinks;
    /* Bare minimum we'll need exactly the same number of links as relays */
    memRelayLinks.reserve(memRelays.size());

    bool areaInit = false;
    size_t layerIdx = 0;
    LayerResources layerResources;
    for (const hecl::DirectoryEnumerator::Entry& e :
         hecl::DirectoryEnumerator(area.path.getAbsolutePath(), hecl::DirectoryEnumerator::Mode::DirsSorted)) {
      hecl::SystemString layerName;
      hecl::SystemChar* endCh = nullptr;
      hecl::StrToUl(e.m_name.c_str(), &endCh, 0);
      if (!endCh)
        layerName = hecl::StringUtils::TrimWhitespace(e.m_name);
      else
        layerName = hecl::StringUtils::TrimWhitespace(hecl::SystemString(endCh));

      hecl::ProjectPath objectsPath(area.path, e.m_name + _SYS_STR("/!objects.yaml"));
      if (objectsPath.isNone())
        continue;

      SCLY::ScriptLayer layer;
      {
        athena::io::FileReader freader(objectsPath.getAbsolutePath());
        if (!freader.isOpen())
          continue;
        if (!athena::io::ValidateFromYAMLStream<DNAMP1::SCLY::ScriptLayer>(freader))
          continue;

        athena::io::YAMLDocReader reader;
        if (!reader.parse(&freader))
          continue;

        layer.read(reader);
      }

      layerResources.beginLayer();

      /* Set active flag state */
      hecl::ProjectPath defActivePath(area.path, e.m_name + _SYS_STR("/!defaultactive"));
      bool active = defActivePath.isNone() ? false : true;

      if (!areaInit) {
        /* Finish last area */
        mlvl.finishLastArea();

        /* Populate area record */
        mlvl.areas.emplace_back();
        MLVL::Area& areaOut = mlvl.areas.back();

        hecl::ProjectPath namePath = GetPathBeginsWith(areaDEnum, area.path, _SYS_STR("!name_"));
        if (namePath.isFile())
          areaOut.areaNameId = namePath;

        areaOut.transformMtx[0] = area.transform[0];
        areaOut.transformMtx[1] = area.transform[1];
        areaOut.transformMtx[2] = area.transform[2];
        areaOut.aabb[0] = area.aabb[0];
        areaOut.aabb[1] = area.aabb[1];
        areaOut.areaMREAId = areaPath;
        areaOut.areaId = 0xffffffff;

        hecl::ProjectPath memIdPath(area.path, _SYS_STR("!memoryid.yaml"));
        if (memIdPath.isFile()) {
          athena::io::FileReader fr(memIdPath.getAbsolutePath());
          athena::io::YAMLDocReader r;
          if (r.parse(&fr))
            areaOut.areaId = r.readUint32("memoryid");
        }

        /* Attached Areas and Docks */
        {
          std::unordered_set<uint32_t> addedAreas;
          areaOut.dockCount = area.docks.size();
          for (const World::Area::Dock& dock : area.docks) {
            areaOut.docks.emplace_back();
            MLVL::Area::Dock& dockOut = areaOut.docks.back();

            if (dock.targetArea != UINT32_MAX && dock.targetDock != UINT32_MAX) {
              dockOut.endpointCount = 1;
              dockOut.endpoints.emplace_back();
              MLVL::Area::Dock::Endpoint& ep = dockOut.endpoints.back();
              ep.areaIdx = dock.targetArea;
              ep.dockIdx = dock.targetDock;

              if (addedAreas.find(dock.targetArea) == addedAreas.cend()) {
                addedAreas.insert(dock.targetArea);
                areaOut.attachedAreas.push_back(dock.targetArea);
              }
            } else {
              dockOut.endpointCount = 0;
            }

            dockOut.planeVertCount = 4;
            dockOut.planeVerts.push_back(dock.verts[0]);
            dockOut.planeVerts.push_back(dock.verts[1]);
            dockOut.planeVerts.push_back(dock.verts[2]);
            dockOut.planeVerts.push_back(dock.verts[3]);
          }
          areaOut.attachedAreaCount = areaOut.attachedAreas.size();
        }

        /* Layer flags */
        mlvl.layerFlags.emplace_back();
        mlvl.layerFlags.back().layerCount = 0;
        mlvl.layerFlags.back().flags = ~0;

        /* Layer name offset */
        mlvl.layerNameOffsets.push_back(nameOffset);

        areaInit = true;
      }

      /* Gather memory relays, scans, and dependencies */
      {
        g_ThreadBlenderToken.reset(&btok);
        std::vector<hecl::ProjectPath> depPaths;
        std::vector<hecl::ProjectPath> lazyPaths;
        for (std::unique_ptr<IScriptObject>& obj : layer.objects) {
          if (obj->type == int(metaforce::EScriptObjectType::MemoryRelay)) {
            MemoryRelay& memRelay = static_cast<MemoryRelay&>(*obj);
            for (IScriptObject::Connection& conn : memRelay.connections) {
              MemRelayLink linkOut;
              linkOut.memRelayId = memRelay.id;
              linkOut.targetId = conn.target;
              linkOut.msg = conn.msg;
              linkOut.active = memRelay.active;
              auto iter = std::find(memRelays.begin(), memRelays.end(), linkOut.memRelayId);
              if (iter == memRelays.end()) {
                /* We must have a new relay, let's track it */
                memRelayLinks.push_back(linkOut);
                memRelays.push_back(memRelay.id);
              } else {
                memRelayLinks.push_back(linkOut);
              }
            }
          }

          obj->gatherDependencies(depPaths, lazyPaths);
        }

        /* Cull duplicate paths and add typed hash to list */
        for (const hecl::ProjectPath& path : depPaths)
          layerResources.addPath(path, false);
        for (const hecl::ProjectPath& path : lazyPaths)
          layerResources.addPath(path, true);
      }

      hecl::SystemUTF8Conv layerU8(layerName);
      mlvl.layerNames.emplace_back(layerU8.str());
      nameOffset += layerName.size() + 1;

      MLVL::LayerFlags& thisLayFlags = mlvl.layerFlags.back();
      ++thisLayFlags.layerCount;
      if (!active)
        thisLayFlags.flags &= ~(1 << layerIdx);

      ++layerIdx;
    }

    if (!areaInit)
      Log.report(logvisor::Info, FMT_STRING(_SYS_STR("No layer directories for area {}")), area.path.getRelativePath());

    /* Build deplist */
    MLVL::Area& areaOut = mlvl.areas.back();
    for (const std::vector<std::pair<hecl::ProjectPath, bool>>& layer : layerResources.layerPaths) {
      areaOut.depLayers.push_back(areaOut.deps.size());
      for (const std::pair<hecl::ProjectPath, bool>& path : layer) {
        if (path.first) {
          metaforce::SObjectTag tag = g_curSpec->buildTagFromPath(path.first);
          if (tag.id.IsValid()) {
            if (path.second)
              areaOut.lazyDeps.emplace_back(tag.id.Value(), tag.type);
            else
              areaOut.lazyDeps.emplace_back(0, FOURCC('NONE'));
            areaOut.deps.emplace_back(tag.id.Value(), tag.type);
          }
        }
      }
    }

    /* Append Memory Relays */
    if (!memRelayLinks.empty())
      mlvl.memRelayLinks.insert(mlvl.memRelayLinks.end(), memRelayLinks.begin(), memRelayLinks.end());

    /* Cull duplicate area paths and add typed hash to list */
    auto& conn = btok.getBlenderConnection();
    if (conn.openBlend(areaPath)) {
      areaOut.depLayers.push_back(areaOut.deps.size());

      auto ds = conn.beginData();
      std::vector<hecl::ProjectPath> texs = ds.getTextures();
      ds.close();

      for (const hecl::ProjectPath& path : texs)
        layerResources.addSharedPath(path, false);

      for (const std::pair<hecl::ProjectPath, bool>& path : layerResources.sharedPaths) {
        metaforce::SObjectTag tag = g_curSpec->buildTagFromPath(path.first);
        if (tag.id.IsValid()) {
          if (path.second)
            areaOut.lazyDeps.emplace_back(tag.id.Value(), tag.type);
          else
            areaOut.lazyDeps.emplace_back(0, FOURCC('NONE'));
          areaOut.deps.emplace_back(tag.id.Value(), tag.type);
        }
      }

      hecl::ProjectPath pathPath = GetPathBeginsWith(areaDEnum, area.path, _SYS_STR("!path_"));
      metaforce::SObjectTag pathTag = g_curSpec->buildTagFromPath(pathPath);
      if (pathTag.id.IsValid()) {
        areaOut.deps.emplace_back(pathTag.id.Value(), pathTag.type);
        areaOut.lazyDeps.emplace_back(0, FOURCC('NONE'));
      }
    }

    ++areaIdx;
  }

  /* Finish last area */
  mlvl.finishLastArea();

  mlvl.memRelayLinkCount = mlvl.memRelayLinks.size();
  mlvl.areaCount = mlvl.areas.size();
  mlvl.layerFlagCount = mlvl.layerFlags.size();
  mlvl.layerNameCount = mlvl.layerNames.size();
  mlvl.layerNameOffsetCount = mlvl.layerNameOffsets.size();

  /* Write out */
  {
    athena::io::FileWriter fo(outPath.getAbsolutePath());
    mlvl.write(fo);
    int64_t rem = fo.position() % 32;
    if (rem)
      for (int64_t i = 0; i < 32 - rem; ++i)
        fo.writeBytes((atInt8*)"\xff", 1);
  }

  return true;
}

bool MLVL::CookMAPW(const hecl::ProjectPath& outPath, const World& wld) {
  std::vector<metaforce::SObjectTag> mapaTags;
  mapaTags.reserve(wld.areas.size());

  for (const World::Area& area : wld.areas) {
    if (area.path.getPathType() != hecl::ProjectPath::Type::Directory)
      continue;

    /* Area map */
    hecl::ProjectPath mapPath = GetPathBeginsWith(area.path, _SYS_STR("!map_"));
    if (mapPath.isFile())
      mapaTags.push_back(g_curSpec->buildTagFromPath(mapPath));
  }

  /* Write out MAPW */
  {
    athena::io::FileWriter fo(outPath.getAbsolutePath());
    fo.writeUint32Big(0xDEADF00D);
    fo.writeUint32Big(1);
    fo.writeUint32Big(mapaTags.size());
    for (const metaforce::SObjectTag& mapa : mapaTags)
      fo.writeUint32Big(u32(mapa.id.Value()));
    int64_t rem = fo.position() % 32;
    if (rem)
      for (int64_t i = 0; i < 32 - rem; ++i)
        fo.writeBytes((atInt8*)"\xff", 1);
  }

  return true;
}

bool MLVL::CookSAVW(const hecl::ProjectPath& outPath, const World& wld) {
  SAVW savw = {};
  savw.header.magic = 0xC001D00D;
  savw.header.version = 0x3;
  std::unordered_set<UniqueID32> addedScans;

  for (const World::Area& area : wld.areas) {
    if (area.path.getPathType() != hecl::ProjectPath::Type::Directory)
      continue;

    hecl::ProjectPath areaPath = GetPathBeginsWith(area.path, _SYS_STR("!area_"));
    if (!areaPath.isFile())
      continue;

    hecl::ProjectPath memRelayPath(area.path, _SYS_STR("/!memoryrelays.yaml"));
    std::vector<atUint32> memRelays;
    if (memRelayPath.isFile()) {
      athena::io::FileReader fr(memRelayPath.getAbsolutePath());
      athena::io::YAMLDocReader r;
      if (r.parse(&fr))
        r.enumerate<atUint32>("memrelays", memRelays);
    }
    savw.relays.insert(savw.relays.end(), memRelays.begin(), memRelays.end());

    for (const hecl::DirectoryEnumerator::Entry& e :
         hecl::DirectoryEnumerator(area.path.getAbsolutePath(), hecl::DirectoryEnumerator::Mode::DirsSorted)) {
      hecl::SystemString layerName;
      hecl::SystemChar* endCh = nullptr;
      hecl::StrToUl(e.m_name.c_str(), &endCh, 0);
      if (!endCh)
        layerName = hecl::StringUtils::TrimWhitespace(e.m_name);
      else
        layerName = hecl::StringUtils::TrimWhitespace(hecl::SystemString(endCh));

      hecl::ProjectPath objectsPath(area.path, e.m_name + _SYS_STR("/!objects.yaml"));
      if (objectsPath.isNone())
        continue;

      SCLY::ScriptLayer layer;
      {
        athena::io::FileReader freader(objectsPath.getAbsolutePath());
        if (!freader.isOpen())
          continue;
        if (!athena::io::ValidateFromYAMLStream<DNAMP1::SCLY::ScriptLayer>(freader))
          continue;

        athena::io::YAMLDocReader reader;
        if (!reader.parse(&freader))
          continue;

        layer.read(reader);
      }

      /* Gather memory relays, scans, and dependencies */
      {
        std::vector<Scan> scans;
        for (std::unique_ptr<IScriptObject>& obj : layer.objects) {
          if (obj->type == int(metaforce::EScriptObjectType::MemoryRelay)) {
            MemoryRelay& memRelay = static_cast<MemoryRelay&>(*obj);
            auto iter = std::find(memRelays.begin(), memRelays.end(), memRelay.id);
            if (iter == memRelays.end()) {
              /* We must have a new relay, let's track it */
              savw.relays.push_back(memRelay.id);
              memRelays.push_back(memRelay.id);
            }
          } else if (obj->type == int(metaforce::EScriptObjectType::SpecialFunction)) {
            SpecialFunction& specialFunc = static_cast<SpecialFunction&>(*obj);
            if (specialFunc.function == ESpecialFunctionType::CinematicSkip)
              savw.skippableCutscenes.push_back(specialFunc.id);
            else if (specialFunc.function == ESpecialFunctionType::ScriptLayerController) {
              savw.layers.emplace_back();
              SAVWCommon::Layer& layer = savw.layers.back();
              layer.areaId = specialFunc.layerSwitch.area;
              layer.layer = specialFunc.layerSwitch.layerIdx;
            }
          } else if (obj->type == int(metaforce::EScriptObjectType::Door)) {
            DoorArea& doorArea = static_cast<DoorArea&>(*obj);
            savw.doors.push_back(doorArea.id);
          }

          obj->gatherScans(scans);
        }

        /* Cull duplicate scans and add to list */
        for (const Scan& scan : scans) {
          if (!scan.scanId.isValid())
            continue;
          if (addedScans.find(scan.scanId) == addedScans.cend()) {
            addedScans.insert(scan.scanId);
            hecl::ProjectPath scanPath = UniqueIDBridge::TranslatePakIdToPath(scan.scanId);
            savw.scans.emplace_back();
            Scan& scanOut = savw.scans.back();
            scanOut.scanId = scan.scanId;
            scanOut.category = SAVWCommon::EScanCategory(SCAN::GetCategory(scanPath));
          }
        }
      }
    }
  }

  /* Write out SAVW */
  {
    savw.header.areaCount = wld.areas.size();
    savw.skippableCutsceneCount = savw.skippableCutscenes.size();
    savw.relayCount = savw.relays.size();
    savw.layerCount = savw.layers.size();
    savw.doorCount = savw.doors.size();
    savw.scanCount = savw.scans.size();

    athena::io::FileWriter fo(outPath.getAbsolutePath());
    savw.write(fo);
    int64_t rem = fo.position() % 32;
    if (rem)
      for (int64_t i = 0; i < 32 - rem; ++i)
        fo.writeBytes((atInt8*)"\xff", 1);
  }

  return true;
}

} // namespace DNAMP1
} // namespace DataSpec