#include <set>

#define NOD_ATHENA 1
#include "DNAMP3.hpp"
#include "STRG.hpp"
#include "MLVL.hpp"
#include "CAUD.hpp"
#include "CMDL.hpp"
#include "CHAR.hpp"
#include "MREA.hpp"
#include "MAPA.hpp"
#include "PATH.hpp"
#include "SAVW.hpp"
#include "HINT.hpp"
#include "DataSpec/DNACommon/TXTR.hpp"
#include "DataSpec/DNACommon/FONT.hpp"
#include "DataSpec/DNACommon/FSM2.hpp"
#include "DataSpec/DNACommon/DGRP.hpp"
#include "Runtime/GCNTypes.hpp"

namespace DataSpec::DNAMP3 {
logvisor::Module Log("urde::DNAMP3");

static bool GetNoShare(std::string_view name) {
  std::string lowerName(name);
  std::transform(lowerName.begin(), lowerName.end(), lowerName.begin(), tolower);
  return !lowerName.starts_with("metroid"sv) && !lowerName.starts_with("frontend"sv) &&
         !lowerName.starts_with("rs5fe"sv) && !lowerName.starts_with("universearea"sv);
}

PAKBridge::PAKBridge(const nod::Node& node, bool doExtract)
: m_node(node), m_pak(GetNoShare(node.getName())), m_doExtract(doExtract) {
  nod::AthenaPartReadStream rs(node.beginReadStream());
  m_pak.read(rs);

  /* Append Level String */
  std::set<hecl::SystemString, hecl::CaseInsensitiveCompare> uniq;
  for (auto& ent : m_pak.m_entries) {
    PAK::Entry& entry = ent.second;
    if (entry.type == FOURCC('MLVL')) {
      PAKEntryReadStream rs = entry.beginReadStream(m_node);
      MLVL mlvl;
      mlvl.read(rs);
      const PAK::Entry* nameEnt = m_pak.lookupEntry(mlvl.worldNameId);
      if (nameEnt) {
        PAKEntryReadStream rs = nameEnt->beginReadStream(m_node);
        STRG mlvlName;
        mlvlName.read(rs);
        uniq.insert(mlvlName.getSystemString(FOURCC('ENGL'), 0));
      }
    }
  }
  bool comma = false;
  for (const hecl::SystemString& str : uniq) {
    if (comma)
      m_levelString += _SYS_STR(", ");
    comma = true;
    m_levelString += str;
  }
}

static hecl::SystemString LayerName(std::string_view name) {
  hecl::SystemString ret(hecl::SystemStringConv(name).sys_str());
  for (auto& ch : ret)
    if (ch == _SYS_STR('/') || ch == _SYS_STR('\\'))
      ch = _SYS_STR('-');
  return ret;
}

void PAKBridge::build() {
  /* First pass: build per-area/per-layer dependency map */
  for (const auto& ent : m_pak.m_entries) {
    const PAK::Entry& entry = ent.second;
    if (entry.type == FOURCC('MLVL')) {
      Level& level = m_levelDeps[entry.id];

      MLVL mlvl;
      {
        PAKEntryReadStream rs = entry.beginReadStream(m_node);
        mlvl.read(rs);
      }
      std::string catalogueName;
      std::string bestName = m_pak.bestEntryName(m_node, entry, catalogueName);
      level.name = hecl::SystemStringConv(bestName).sys_str();
      level.areas.reserve(mlvl.areaCount);
      unsigned layerIdx = 0;

      /* Make MAPW available to lookup MAPAs */
      const PAK::Entry* worldMapEnt = m_pak.lookupEntry(mlvl.worldMap);
      std::vector<UniqueID64> mapw;
      if (worldMapEnt) {
        PAKEntryReadStream rs = worldMapEnt->beginReadStream(m_node);
        rs.seek(8, athena::SeekOrigin::Current);
        atUint32 areaCount = rs.readUint32Big();
        mapw.reserve(areaCount);
        for (atUint32 i = 0; i < areaCount; ++i)
          mapw.emplace_back(rs);
      }

      /* Index areas */
      unsigned ai = 0;
      auto layerFlagsIt = mlvl.layerFlags.begin();
      for (const MLVL::Area& area : mlvl.areas) {
        Level::Area& areaDeps = level.areas[area.areaMREAId];
        const PAK::Entry* areaNameEnt = m_pak.lookupEntry(area.areaNameId);
        if (areaNameEnt) {
          STRG areaName;
          {
            PAKEntryReadStream rs = areaNameEnt->beginReadStream(m_node);
            areaName.read(rs);
          }
          areaDeps.name = areaName.getSystemString(FOURCC('ENGL'), 0);
          areaDeps.name = hecl::StringUtils::TrimWhitespace(areaDeps.name);
        }
        if (areaDeps.name.empty()) {
          areaDeps.name = hecl::SystemStringConv(area.internalAreaName).sys_str();
          if (areaDeps.name.empty()) {
            std::string idStr = area.areaMREAId.toString();
            areaDeps.name = hecl::SystemString(_SYS_STR("MREA_")) + hecl::SystemStringConv(idStr).c_str();
          }
        }
        hecl::SystemString num = fmt::format(FMT_STRING(_SYS_STR("{:02d} ")), ai);
        areaDeps.name = num + areaDeps.name;

        const MLVL::LayerFlags& layerFlags = *layerFlagsIt++;
        if (layerFlags.layerCount) {
          areaDeps.layers.reserve(layerFlags.layerCount);
          for (unsigned l = 1; l < layerFlags.layerCount; ++l) {
            areaDeps.layers.emplace_back();
            Level::Area::Layer& layer = areaDeps.layers.back();
            layer.name = LayerName(mlvl.layerNames[layerIdx++]);
            layer.active = layerFlags.flags >> (l - 1) & 0x1;
            layer.name = hecl::StringUtils::TrimWhitespace(layer.name);
            num = fmt::format(FMT_STRING(_SYS_STR("{:02d} ")), l - 1);
            layer.name = num + layer.name;
          }
        }

        /* Load area DEPS */
        const PAK::Entry* areaEntry = m_pak.lookupEntry(area.areaMREAId);
        if (areaEntry) {
          PAKEntryReadStream ars = areaEntry->beginReadStream(m_node);
          MREA::ExtractLayerDeps(ars, areaDeps);
        }
        areaDeps.resources.emplace(area.areaMREAId);
        if (mapw.size() > ai)
          areaDeps.resources.emplace(mapw[ai]);
        ++ai;
      }
    }
  }

  /* Second pass: cross-compare uniqueness */
  for (auto& entry : m_pak.m_entries) {
    entry.second.unique.checkEntry(*this, entry.second);
  }
}

void PAKBridge::addCMDLRigPairs(PAKRouter<PAKBridge>& pakRouter, CharacterAssociations<UniqueID64>& charAssoc) const {
  for (const auto& entry : m_pak.m_entries) {
    if (entry.second.type == FOURCC('CHAR')) {
      PAKEntryReadStream rs = entry.second.beginReadStream(m_node);
      CHAR aChar;
      aChar.read(rs);
      const CHAR::CharacterInfo& ci = aChar.characterInfo;
      charAssoc.m_cmdlRigs[ci.cmdl] = {ci.cskr, ci.cinf};
      charAssoc.m_cskrToCharacter[ci.cskr] =
          std::make_pair(entry.second.id, fmt::format(FMT_STRING("{}_{}.CSKR"), ci.name, ci.cskr));
      for (const CHAR::CharacterInfo::Overlay& overlay : ci.overlays) {
        charAssoc.m_cmdlRigs[overlay.cmdl] = {overlay.cskr, ci.cinf};
        charAssoc.m_cskrToCharacter[overlay.cskr] =
            std::make_pair(entry.second.id, fmt::format(FMT_STRING("{}.{}_{}.CSKR"), ci.name, overlay.type, overlay.cskr));
      }
    }
  }
}

static const atVec4f BottomRow = {{0.f, 0.f, 0.f, 1.f}};

void PAKBridge::addMAPATransforms(PAKRouter<PAKBridge>& pakRouter,
                                  std::unordered_map<UniqueID64, zeus::CMatrix4f>& addTo,
                                  std::unordered_map<UniqueID64, hecl::ProjectPath>& pathOverrides) const {
  for (const auto& entry : m_pak.m_entries) {
    if (entry.second.type == FOURCC('MLVL')) {
      MLVL mlvl;
      {
        PAKEntryReadStream rs = entry.second.beginReadStream(m_node);
        mlvl.read(rs);
      }
      hecl::ProjectPath mlvlDirPath = pakRouter.getWorking(&entry.second).getParentPath();

      if (mlvl.worldNameId.isValid())
        pathOverrides[mlvl.worldNameId] = hecl::ProjectPath(mlvlDirPath,
            fmt::format(FMT_STRING(_SYS_STR("!name_{}.yaml")), mlvl.worldNameId));

      for (const MLVL::Area& area : mlvl.areas) {
        {
          /* Get PATH transform */
          const nod::Node* areaNode;
          const PAK::Entry* areaEntry = pakRouter.lookupEntry(area.areaMREAId, &areaNode);
          PAKEntryReadStream rs = areaEntry->beginReadStream(*areaNode);
          UniqueID64 pathId = MREA::GetPATHId(rs);
          if (pathId.isValid())
            addTo[pathId] = zeus::CMatrix4f(area.transformMtx[0], area.transformMtx[1], area.transformMtx[2], BottomRow)
                .transposed();
        }
        hecl::ProjectPath areaDirPath = pakRouter.getWorking(area.areaMREAId).getParentPath();
        if (area.areaNameId.isValid())
          pathOverrides[area.areaNameId] = hecl::ProjectPath(areaDirPath,
              fmt::format(FMT_STRING(_SYS_STR("!name_{}.yaml")), area.areaNameId));
      }

      if (mlvl.worldMap.isValid()) {
        const nod::Node* mapNode;
        const PAK::Entry* mapEntry = pakRouter.lookupEntry(mlvl.worldMap, &mapNode);
        if (mapEntry) {
          PAKEntryReadStream rs = mapEntry->beginReadStream(*mapNode);
          u32 magic = rs.readUint32Big();
          if (magic == 0xDEADF00D) {
            rs.readUint32Big();
            u32 count = rs.readUint32Big();
            for (u32 i = 0; i < count && i < mlvl.areas.size(); ++i) {
              MLVL::Area& areaData = mlvl.areas[i];
              UniqueID64 mapaId;
              mapaId.read(rs);
              addTo[mapaId] = zeus::CMatrix4f(areaData.transformMtx[0], areaData.transformMtx[1],
                                              areaData.transformMtx[2], BottomRow)
                                  .transposed();
            }
          }
        }
      }
    }
  }
}

ResExtractor<PAKBridge> PAKBridge::LookupExtractor(const nod::Node& pakNode, const PAK& pak, const PAK::Entry& entry) {
  switch (entry.type.toUint32()) {
  case SBIG('CAUD'):
    return {CAUD::Extract, {_SYS_STR(".yaml")}};
  case SBIG('STRG'):
    return {STRG::Extract, {_SYS_STR(".yaml")}};
  case SBIG('TXTR'):
    return {TXTR::Extract, {_SYS_STR(".png")}};
  case SBIG('SAVW'):
    return {SAVWCommon::ExtractSAVW<SAVW>, {_SYS_STR(".yaml")}};
  case SBIG('HINT'):
    return {HINT::Extract, {_SYS_STR(".yaml")}};
  case SBIG('CMDL'):
    return {CMDL::Extract, {_SYS_STR(".blend")}, 1};
  case SBIG('CINF'):
    return {CINF::Extract<PAKBridge>, {_SYS_STR(".blend")}, 1};
  case SBIG('CHAR'):
    return {CHAR::Extract, {_SYS_STR(".yaml"), _SYS_STR(".blend")}, 2};
  case SBIG('MLVL'):
    return {MLVL::Extract, {_SYS_STR(".yaml"), _SYS_STR(".blend")}, 3};
  case SBIG('MREA'):
    return {MREA::Extract, {_SYS_STR(".blend")}, 4};
  case SBIG('MAPA'):
    return {MAPA::Extract, {_SYS_STR(".blend")}, 4};
  case SBIG('PATH'):
    return {PATH::Extract, {_SYS_STR(".blend")}, 5};
  case SBIG('FSM2'):
    return {DNAFSM2::ExtractFSM2<UniqueID64>, {_SYS_STR(".yaml")}};
  case SBIG('FONT'):
    return {DNAFont::ExtractFONT<UniqueID64>, {_SYS_STR(".yaml")}};
  case SBIG('DGRP'):
    return {DNADGRP::ExtractDGRP<UniqueID64>, {_SYS_STR(".yaml")}};
  }
  return {};
}

} // namespace DataSpec::DNAMP3