#include <stdio.h>

#define NOD_ATHENA 1
#include "DNAMP1.hpp"
#include "STRG.hpp"
#include "MLVL.hpp"
#include "../DNACommon/TXTR.hpp"
#include "CMDL.hpp"
#include "ANCS.hpp"
#include "MREA.hpp"

namespace Retro
{
namespace DNAMP1
{
LogVisor::LogModule Log("Retro::DNAMP1");

static bool GetNoShare(const std::string& name)
{
    std::string lowerName = name;
    std::transform(lowerName.begin(), lowerName.end(), lowerName.begin(), tolower);
    if (!lowerName.compare(0, 7, "metroid"))
        return false;
    return true;
}

PAKBridge::PAKBridge(HECL::Database::Project& project, const NOD::DiscBase::IPartition::Node& node)
: m_project(project), m_node(node), m_pak(false, GetNoShare(node.getName()))
{
    NOD::AthenaPartReadStream rs(node.beginReadStream());
    m_pak.read(rs);

    /* Append Level String */
    for (PAK::Entry& entry : m_pak.m_entries)
    {
        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);
                if (m_levelString.size())
                    m_levelString += _S(", ");
                m_levelString += mlvlName.getSystemString(FOURCC('ENGL'), 0);
            }
        }
    }
}

UniqueResult PAKBridge::uniqueCheck(const PAK::Entry& entry)
{
    UniqueResult::Type result = UniqueResult::UNIQUE_NOTFOUND;
    bool foundOneLayer = false;
    const HECL::SystemString* levelName = nullptr;
    UniqueID32 levelId;
    UniqueID32 areaId;
    unsigned layerIdx;
    for (const auto& lpair : m_levelDeps)
    {
        levelName = &lpair.second.name;
        if (entry.id == lpair.first)
        {
            result = UniqueResult::UNIQUE_LEVEL;
            break;
        }

        for (const auto& pair : lpair.second.areas)
        {
            unsigned l=0;
            for (const auto& layer : pair.second.layers)
            {
                if (layer.resources.find(entry.id) != layer.resources.end())
                {
                    if (foundOneLayer)
                    {
                        if (areaId == pair.first)
                        {
                            result = UniqueResult::UNIQUE_AREA;
                        }
                        else if (levelId == lpair.first)
                        {
                            result = UniqueResult::UNIQUE_LEVEL;
                            break;
                        }
                        else
                        {
                            return {UniqueResult::UNIQUE_PAK};
                        }
                        continue;
                    }
                    else
                        result = UniqueResult::UNIQUE_LAYER;
                    levelId = lpair.first;
                    areaId = pair.first;
                    layerIdx = l;
                    foundOneLayer = true;
                }
                ++l;
            }
            if (pair.second.resources.find(entry.id) != pair.second.resources.end())
            {
                if (foundOneLayer)
                {
                    if (areaId == pair.first)
                    {
                        result = UniqueResult::UNIQUE_AREA;
                    }
                    else if (levelId == lpair.first)
                    {
                        result = UniqueResult::UNIQUE_LEVEL;
                        break;
                    }
                    else
                    {
                        return {UniqueResult::UNIQUE_PAK};
                    }
                    continue;
                }
                else
                    result = UniqueResult::UNIQUE_AREA;
                levelId = lpair.first;
                areaId = pair.first;
                foundOneLayer = true;
            }
        }
    }
    UniqueResult retval = {result};
    retval.levelName = levelName;
    if (result == UniqueResult::UNIQUE_LAYER || result == UniqueResult::UNIQUE_AREA)
    {
        const PAKBridge::Level::Area& area = m_levelDeps[levelId].areas[areaId];
        retval.areaName = &area.name;
        if (result == UniqueResult::UNIQUE_LAYER)
        {
            const PAKBridge::Level::Area::Layer& layer = area.layers[layerIdx];
            retval.layerName = &layer.name;
        }
    }
    return retval;
}

static HECL::SystemString LayerName(const std::string& name)
{
#if HECL_UCS2
    HECL::SystemString ret = HECL::UTF8ToWide(name);
#else
    HECL::SystemString ret = name;
#endif
    for (auto& ch : ret)
        if (ch == _S('/') || ch == _S('\\'))
            ch = _S('-');
    return ret;
}

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

            PAKEntryReadStream rs = entry.beginReadStream(m_node);
            MLVL mlvl;
            mlvl.read(rs);
#if HECL_UCS2
            level.name = HECL::UTF8ToWide(m_pak.bestEntryName(entry));
#else
            level.name = m_pak.bestEntryName(entry);
#endif
            level.areas.reserve(mlvl.areaCount);
            unsigned layerIdx = 0;

            /* Pre-pass: find duplicate area names */
            std::unordered_map<HECL::SystemString, std::pair<atUint32, atUint32>> dupeTracker;
            dupeTracker.reserve(mlvl.areas.size());
            for (const MLVL::Area& area : mlvl.areas)
            {
                const PAK::Entry* areaNameEnt = m_pak.lookupEntry(area.areaNameId);
                if (areaNameEnt)
                {
                    STRG areaName;
                    PAKEntryReadStream rs = areaNameEnt->beginReadStream(m_node);
                    areaName.read(rs);
                    HECL::SystemString name = areaName.getSystemString(FOURCC('ENGL'), 0);
                    auto search = dupeTracker.find(name);
                    if (search != dupeTracker.end())
                        ++search->second.first;
                    else
                        dupeTracker[name] = std::make_pair(1, 1);
                }
            }

            /* Main-pass: index areas */
            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);
                    auto search = dupeTracker.find(areaDeps.name);
                    if (search != dupeTracker.end() && search->second.first > 1)
                    {
                        char num[16];
                        snprintf(num, 16, " (%d)", search->second.second++);
                        areaDeps.name += num;
                    }

                    /* Trim possible trailing whitespace */
#if HECL_UCS2
                    while (areaDeps.name.size() && iswblank(areaDeps.name.back()))
                        areaDeps.name.pop_back();
#else
                    while (areaDeps.name.size() && isblank(areaDeps.name.back()))
                        areaDeps.name.pop_back();
#endif
                }
                if (areaDeps.name.empty())
                {
#if HECL_UCS2
                    areaDeps.name = _S("MREA_") + HECL::UTF8ToWide(area.areaMREAId.toString());
#else
                    areaDeps.name = "MREA_" + area.areaMREAId.toString();
#endif
                }

                areaDeps.layers.reserve(area.depLayerCount-1);
                unsigned r=0;
                for (unsigned l=1 ; l<area.depLayerCount ; ++l)
                {
                    areaDeps.layers.emplace_back();
                    Level::Area::Layer& layer = areaDeps.layers.back();
                    layer.name = LayerName(mlvl.layerNames[layerIdx++]);
                    /* Trim possible trailing whitespace */
#if HECL_UCS2
                    while (layer.name.size() && iswblank(layer.name.back()))
                        layer.name.pop_back();
#else
                    while (layer.name.size() && isblank(layer.name.back()))
                        layer.name.pop_back();
#endif

                    layer.resources.reserve(area.depLayers[l] - r);
                    for (; r<area.depLayers[l] ; ++r)
                        layer.resources.emplace(area.deps[r].id);
                }
                areaDeps.resources.reserve(area.depCount - r);
                for (; r<area.depCount ; ++r)
                    areaDeps.resources.emplace(area.deps[r].id);
                areaDeps.resources.emplace(area.areaMREAId);
            }
        }
    }

    /* Second pass: cross-compare uniqueness */
    for (PAK::Entry& entry : m_pak.m_entries)
    {
        entry.unique = uniqueCheck(entry);
    }
}

void PAKBridge::addCMDLRigPairs(std::unordered_map<UniqueID32, std::pair<UniqueID32, UniqueID32>>& addTo) const
{
    for (const std::pair<UniqueID32, PAK::Entry*>& entry : m_pak.m_idMap)
    {
        if (entry.second->type == FOURCC('ANCS'))
        {
            PAKEntryReadStream rs = entry.second->beginReadStream(m_node);
            ANCS ancs;
            ancs.read(rs);
            for (const ANCS::CharacterSet::CharacterInfo& ci : ancs.characterSet.characters)
                addTo[ci.cmdl] = std::make_pair(ci.cskr, ci.cinf);
        }
    }
}

ResExtractor<PAKBridge> PAKBridge::LookupExtractor(const PAK::Entry& entry)
{
    switch (entry.type)
    {
    case SBIG('STRG'):
        return {STRG::Extract, nullptr, {_S(".yaml")}};
    case SBIG('TXTR'):
        return {TXTR::Extract, nullptr, {_S(".png")}};
    case SBIG('CMDL'):
        return {nullptr, CMDL::Extract, {_S(".blend")}, 1};
    case SBIG('ANCS'):
        return {nullptr, ANCS::Extract, {_S(".yaml"), _S(".blend")}, 2};
    case SBIG('MREA'):
        return {nullptr, MREA::Extract, {_S(".blend")}, 3};
    case SBIG('MLVL'):
        return {MLVL::Extract, nullptr, {_S(".yaml")}};
    }
    return {};
}

}
}