#ifndef __URDE_TYPES_HPP__
#define __URDE_TYPES_HPP__

#include <vector>
#include <utility>
#include <string>
#include <functional>
#include "GCNTypes.hpp"
#include "rstl.hpp"
#include "IOStreams.hpp"
#include "hecl/hecl.hpp"

using namespace std::literals;

namespace urde
{

using FourCC = hecl::FourCC;

class CAssetId
{
    u64 id = UINT64_MAX;
public:
    CAssetId() = default;
    CAssetId(u64 v) { Assign(v); }
    explicit CAssetId(CInputStream& in);
    bool IsValid() const { return id != UINT64_MAX; }
    u64 Value() const { return id; }
    void Assign(u64 v) { id = (v == UINT32_MAX ? UINT64_MAX : (v == 0 ? UINT64_MAX : v)); }
    void Reset() { id = UINT64_MAX; }
    void PutTo(COutputStream& out);
    bool operator==(const CAssetId& other) const { return id == other.id; }
    bool operator!=(const CAssetId& other) const { return id != other.id; }
    bool operator<(const CAssetId& other) const { return id < other.id; }
};

//#define kInvalidAssetId CAssetId()

struct SObjectTag
{
    FourCC type;
    CAssetId id;

    operator bool() const { return id.IsValid(); }
    bool operator!=(const SObjectTag& other) const { return id != other.id; }
    bool operator==(const SObjectTag& other) const { return id == other.id; }
    bool operator<(const SObjectTag& other) const { return id < other.id; }
    SObjectTag() = default;
    SObjectTag(FourCC tp, CAssetId rid) : type(tp), id(rid) {}
    SObjectTag(CInputStream& in)
    {
        in.readBytesToBuf(&type, 4);
        id = CAssetId(in);
    }
    void readMLVL(CInputStream& in)
    {
        id = CAssetId(in);
        in.readBytesToBuf(&type, 4);
    }
};

struct TEditorId
{
    TEditorId() = default;
    TEditorId(u32 idin) : id(idin) {}
    u32 id = u32(-1);
    u8 LayerNum() const { return u8((id >> 26) & 0x3f); }
    u16 AreaNum() const { return u16((id >> 16) & 0x3ff); }
    u16 Id() const { return u16(id & 0xffff); }
    bool operator<(const TEditorId& other) const { return (id & 0x3ffffff) < (other.id & 0x3ffffff); }
    bool operator!=(const TEditorId& other) const { return (id & 0x3ffffff) != (other.id & 0x3ffffff); }
    bool operator==(const TEditorId& other) const { return (id & 0x3ffffff) == (other.id & 0x3ffffff); }
};

#define kInvalidEditorId TEditorId()

struct TUniqueId
{
    TUniqueId() = default;
    TUniqueId(u16 value, u16 version) : id(value | (version << 10)) {}
    u16 id = u16(-1);
    u16 Version() const { return u16((id >> 10) & 0x3f); }
    u16 Value() const { return u16(id & 0x3ff); }
    bool operator<(const TUniqueId& other) const { return (id < other.id); }
    bool operator!=(const TUniqueId& other) const { return (id != other.id); }
    bool operator==(const TUniqueId& other) const { return (id == other.id); }
};

#define kInvalidUniqueId TUniqueId()

using TAreaId = s32;

#define kInvalidAreaId TAreaId(-1)

#if 0
template <class T, size_t N>
class TRoundRobin
{
    rstl::reserved_vector<T, N> vals;

public:
    TRoundRobin(const T& val) : vals(N, val) {}

    void PushBack(const T& val) { vals.push_back(val); }

    size_t Size() const { return vals.size(); }

    const T& GetLastValue() const { return vals.back(); }

    void Clear() { vals.clear(); }

    const T& GetValue(s32) const {}
};
#endif

template<class T>
T GetAverage(const T* v, s32 count)
{
    T r = v[0];
    for (s32 i = 1; i < count; ++i)
        r += v[i];

    return r / count;
}

template<class T, size_t N>
class TReservedAverage : rstl::reserved_vector<T, N>
{
public:
    TReservedAverage() = default;

    TReservedAverage(const T& t) { rstl::reserved_vector<T, N>::resize(N, t); }

    void AddValue(const T& t)
    {
        if (this->size() < N)
        {
            this->insert(this->begin(), t);
        } else
        {
            this->pop_back();
            this->insert(this->begin(), t);
        }
    }

    rstl::optional_object<T> GetAverage() const
    {
        if (this->empty())
            return {};

        return {urde::GetAverage<T>(this->data(), this->size())};
    }

    rstl::optional_object<T> GetEntry(int i) const
    {
        if (i >= this->size())
            return {};
        return this->operator[](i);
    }

    void Clear() { this->clear(); }

    size_t Size() const { return this->size(); }
};

}

namespace std
{
template <>
struct hash<urde::SObjectTag>
{
    size_t operator()(const urde::SObjectTag& tag) const noexcept { return tag.id.Value(); }
};

template <>
struct hash<urde::CAssetId>
{
    size_t operator()(const urde::CAssetId& id) const noexcept { return id.Value(); }
};
}

#endif // __URDE_TYPES_HPP__