#ifndef DEFS_H
#define DEFS_H

#include <memory>
#include <windows.h>
#include <commctrl.h>
#include <SWI-Prolog.h>

/* common.cpp */
TCHAR *TszFromSz(const char *, int);
struct Library
{
	Library(const TCHAR *);
	~Library();
	FARPROC GetProcAddress(const char *);
	static std::unique_ptr<Library> Load(const TCHAR *);
private:
	HMODULE m_hModule;
};

/* main.cpp */
void UpdateLayout();

/* listview.cpp */
struct ListView
{
	ListView(HMENU, DWORD);
	int Height(int = -1);
	HWND HWnd(void) const;
	virtual void UpdateTheme(BOOL);
	virtual LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
protected:
	int m_bHeader = 1;
	WNDPROC m_prevProc;
	HWND m_hWnd;
};

/* episodelistview.cpp */
struct EpisodeListView : public ListView
{
	EpisodeListView(void);
	void DoSort(void);
	void EnsureFocusVisible(void);
	LRESULT HandleNotify(LPARAM);
	int ISort(void) const;
	void Redraw(void);
	void SaveFocus(void);
	void SetTop(int);
	void RestoreFocus(void);
	void SelectUnwatched(int);
	void ShowFocus(void);
	void Update(void);
	void UpdateItem(LPLVITEM);
	LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM) override;
private:
	int m_iSort;
	LVITEM m_lviFocus;
	friend int CALLBACK ElvSort(LPARAM, LPARAM, LPARAM);
};

/* datalistview.cpp */
struct DataListView : public ListView
{
	DataListView(void);
	void ShowEpisode(int);
};

/* pl.cpp */
int Pl(const char *, const char *);

inline int PlPut(term_t t, int x) { return PL_put_integer(t, x); }
inline int PlPut(term_t t, long x) { return PL_put_integer(t, x); }
inline int PlPut(term_t t, long long x) { return PL_put_integer(t, x); }
inline int PlPut(term_t t, atom_t x) { return PL_put_atom(t, x); }
inline int PlPut(term_t t, char *x) { return PL_put_atom(t, PL_new_atom(x)); }
inline int PlPut(term_t t, const char *x) { return PL_put_atom(t, PL_new_atom(x)); }
inline int PlPut(term_t t, int *x) { return -1; }
inline int PlPut(term_t t, long *x) { return -1; }
inline int PlPut(term_t t, long long *x) { return -1; }
inline int PlPut(term_t t, atom_t *x) { return -1; }
inline int PlPut(term_t t, char **x) { return -1; }

inline int PlGet(term_t t, int x) { return -1; }
inline int PlGet(term_t t, long x) { return -1; }
inline int PlGet(term_t t, long long x) { return -1; }
inline int PlGet(term_t t, atom_t x) { return -1; }
inline int PlGet(term_t t, char *x) { return -1; }
inline int PlGet(term_t t, const char *x) { return -1; }
inline int PlGet(term_t t, int *x) { return PL_get_integer(t, x); }
inline int PlGet(term_t t, long *x) { return PL_get_long(t, x); }
inline int PlGet(term_t t, long long *x) { return PL_get_int64(t, x); }
inline int PlGet(term_t t, atom_t *x) { return PL_get_atom(t, x); }
inline int PlGet(term_t t, char **x) { return PL_get_atom_chars(t, x); }

template <typename T>
int PlPutv(term_t t, T arg) { return PlPut(t, arg); }
template <typename T, typename ...R>
int PlPutv(term_t t, T arg, R... rest) { return PlPut(t, arg)? PlPutv(t+1, rest...): 0; }
template <typename T>
int PlGetv(term_t t, T arg) { return PlGet(t, arg); }
template <typename T, typename ...R>
int PlGetv(term_t t, T arg, R... rest) { return PlGet(t, arg)? PlGetv(t+1, rest...): 0; }
template <typename T>
int Countv(int i, T arg) { return i+1; }
template <typename T, typename ...R>
int Countv(int i, T arg, R... rest) { return Countv(i+1, rest...); }
template <typename ...T>
int Pl(const char *szMod, const char *szPred, T... args)
{
	int iArity = Countv(0, args...);
	term_t t = PL_new_term_refs(iArity);
	if (!PlPutv(t, args...)) return 0;
	if (!PL_call_predicate(NULL, PL_Q_NORMAL, PL_predicate(szPred, iArity, szMod), t))
		return 0;
	if (!PlGetv(t, args...)) return 0;
	return 1;
}

/* defs.h */
#ifdef UNICODE
#define WA "W"
#else
#define WA "A"
#endif

#define DLVSIKEY 0
#define DLVSIVALUE 1
#define ELVSIEPISODE 0
#define ELVSITITLE 1
#define ELVSIRATING 2

inline int Cmp(int a, int b)
{
	if (a == b)
		return 0;
	if (a > b)
		return 1;
	return -1;
}

inline int Dpi(int i)
{
	extern int g_iDPI;
	return MulDiv(i, g_iDPI, 96);
}

#endif