#include "stdafx.h"
#include "TetrisAssets.h"

/**
 * @brief 根据程序所在目录拼出项目资源文件的绝对路径。
 */
std::wstring BuildAssetPath(const wchar_t* relativePath)
{
    wchar_t modulePath[MAX_PATH] = {};
    GetModuleFileNameW(nullptr, modulePath, MAX_PATH);

    std::wstring basePath(modulePath);
    size_t lastSlash = basePath.find_last_of(L"\\/");
    if (lastSlash != std::wstring::npos)
    {
        basePath.resize(lastSlash);
    }

    std::wstring projectRelative = basePath + L"\\..\\..\\" + relativePath;
    wchar_t fullPath[MAX_PATH] = {};
    DWORD result = GetFullPathNameW(projectRelative.c_str(), MAX_PATH, fullPath, nullptr);
    if (result > 0 && result < MAX_PATH)
    {
        return fullPath;
    }

    return projectRelative;
}

/**
 * @brief 根据当前工作目录拼出项目资源文件的绝对路径。
 */
std::wstring BuildWorkingDirAssetPath(const wchar_t* relativePath)
{
    wchar_t currentDirectory[MAX_PATH] = {};
    DWORD length = GetCurrentDirectoryW(MAX_PATH, currentDirectory);
    if (length == 0 || length >= MAX_PATH)
    {
        return L"";
    }

    std::wstring candidate = std::wstring(currentDirectory) + L"\\" + relativePath;
    wchar_t fullPath[MAX_PATH] = {};
    DWORD result = GetFullPathNameW(candidate.c_str(), MAX_PATH, fullPath, nullptr);
    if (result > 0 && result < MAX_PATH)
    {
        return fullPath;
    }

    return candidate;
}

/**
 * @brief 判断指定路径是否存在且不是目录。
 */
bool FileExists(const std::wstring& path)
{
    DWORD attributes = GetFileAttributesW(path.c_str());
    return attributes != INVALID_FILE_ATTRIBUTES && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0;
}