#include "stdafx.h"
#include "Settings.h"

namespace {
    const wchar_t* kKey = L"Software\\TaskbarCalculator";

    bool ReadDword(const wchar_t* name, DWORD& out) {
        HKEY h;
        if (RegOpenKeyExW(HKEY_CURRENT_USER, kKey, 0, KEY_QUERY_VALUE, &h) != ERROR_SUCCESS)
            return false;
        DWORD type = 0, val = 0, size = sizeof(val);
        LONG r = RegQueryValueExW(h, name, nullptr, &type, (LPBYTE)&val, &size);
        RegCloseKey(h);
        if (r != ERROR_SUCCESS || type != REG_DWORD) return false;
        out = val;
        return true;
    }

    void WriteDword(const wchar_t* name, DWORD val) {
        HKEY h;
        if (RegCreateKeyExW(HKEY_CURRENT_USER, kKey, 0, nullptr, 0,
                            KEY_SET_VALUE, nullptr, &h, nullptr) != ERROR_SUCCESS)
            return;
        RegSetValueExW(h, name, 0, REG_DWORD, (const BYTE*)&val, sizeof(val));
        RegCloseKey(h);
    }
}

namespace Settings {
    bool LoadWindowPos(POINT& pt) {
        DWORD x, y;
        if (ReadDword(L"PosX", x) && ReadDword(L"PosY", y)) {
            pt.x = (LONG)(INT)x; pt.y = (LONG)(INT)y;
            return true;
        }
        return false;
    }
    void SaveWindowPos(POINT pt) {
        WriteDword(L"PosX", (DWORD)pt.x);
        WriteDword(L"PosY", (DWORD)pt.y);
    }
    bool LoadVisible(bool def) {
        DWORD v;
        return ReadDword(L"Visible", v) ? (v != 0) : def;
    }
    void SaveVisible(bool visible) {
        WriteDword(L"Visible", visible ? 1 : 0);
    }
    bool LoadWindowWidth(DWORD& out) {
        DWORD w;
        if (ReadDword(L"Width96", w) && w > 0) { out = w; return true; }
        return false;
    }
    void SaveWindowWidth(DWORD width96) {
        WriteDword(L"Width96", width96);
    }
}