// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#pragma once

#include <memory>
#include <unordered_map>
#include <vector>
#include "common/common_funcs.h"
#include "common/common_types.h"
#include "common/swap.h"
#include "core/hle/service/nvdrv/devices/nvdevice.h"

namespace Service::Nvidia::Devices {

class nvmap final : public nvdevice {
public:
    explicit nvmap(Core::System& system);
    ~nvmap() override;

    NvResult Ioctl1(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
                    IoctlCtrl& ctrl) override;
    NvResult Ioctl2(Ioctl command, const std::vector<u8>& input,
                    const std::vector<u8>& inline_input, std::vector<u8>& output,
                    IoctlCtrl& ctrl) override;
    NvResult Ioctl3(Ioctl command, const std::vector<u8>& input, std::vector<u8>& output,
                    std::vector<u8>& inline_output, IoctlCtrl& ctrl) override;

    /// Returns the allocated address of an nvmap object given its handle.
    VAddr GetObjectAddress(u32 handle) const;

    /// Represents an nvmap object.
    struct Object {
        enum class Status { Created, Allocated };
        u32 id;
        u32 size;
        u32 flags;
        u32 align;
        u8 kind;
        VAddr addr;
        Status status;
        u32 refcount;
        u32 dma_map_addr;
    };

    std::shared_ptr<Object> GetObject(u32 handle) const {
        auto itr = handles.find(handle);
        if (itr != handles.end()) {
            return itr->second;
        }
        return {};
    }

private:
    /// Id to use for the next handle that is created.
    u32 next_handle = 0;

    /// Id to use for the next object that is created.
    u32 next_id = 0;

    /// Mapping of currently allocated handles to the objects they represent.
    std::unordered_map<u32, std::shared_ptr<Object>> handles;

    struct IocCreateParams {
        // Input
        u32_le size{};
        // Output
        u32_le handle{};
    };
    static_assert(sizeof(IocCreateParams) == 8, "IocCreateParams has wrong size");

    struct IocFromIdParams {
        // Input
        u32_le id{};
        // Output
        u32_le handle{};
    };
    static_assert(sizeof(IocFromIdParams) == 8, "IocFromIdParams has wrong size");

    struct IocAllocParams {
        // Input
        u32_le handle{};
        u32_le heap_mask{};
        u32_le flags{};
        u32_le align{};
        u8 kind{};
        INSERT_PADDING_BYTES(7);
        u64_le addr{};
    };
    static_assert(sizeof(IocAllocParams) == 32, "IocAllocParams has wrong size");

    struct IocFreeParams {
        u32_le handle{};
        INSERT_PADDING_BYTES(4);
        u64_le address{};
        u32_le size{};
        u32_le flags{};
    };
    static_assert(sizeof(IocFreeParams) == 24, "IocFreeParams has wrong size");

    struct IocParamParams {
        // Input
        u32_le handle{};
        u32_le param{};
        // Output
        u32_le result{};
    };
    static_assert(sizeof(IocParamParams) == 12, "IocParamParams has wrong size");

    struct IocGetIdParams {
        // Output
        u32_le id{};
        // Input
        u32_le handle{};
    };
    static_assert(sizeof(IocGetIdParams) == 8, "IocGetIdParams has wrong size");

    u32 CreateObject(u32 size);

    NvResult IocCreate(const std::vector<u8>& input, std::vector<u8>& output);
    NvResult IocAlloc(const std::vector<u8>& input, std::vector<u8>& output);
    NvResult IocGetId(const std::vector<u8>& input, std::vector<u8>& output);
    NvResult IocFromId(const std::vector<u8>& input, std::vector<u8>& output);
    NvResult IocParam(const std::vector<u8>& input, std::vector<u8>& output);
    NvResult IocFree(const std::vector<u8>& input, std::vector<u8>& output);
};

} // namespace Service::Nvidia::Devices
