#include <windows.h>

#include "episodelistview.h"
#include "datalistview.h"
#include "layout.h"
#include "main.h"
#include "win.h"

extern Window* g_window;
extern HWND g_hWndStatus;

void UpdateLayout(int w, int h)
{
	if (!g_hWndStatus) return;

	RECT rc, rrStatus;
	if (w && h) rc = {0, 0, w, h};
	else Require(GetClientRect(g_window->hWnd, &rc));
	Require(GetRelativeRect(g_hWndStatus, &rrStatus));

	SendMessageW(g_window->hWnd, WM_SETREDRAW, FALSE, 0);

	/* Resize list views. */
	const long pad = EBIsThemeActive()? Dpi(6): 0; /* Add padding in modern themes. */
	const long cyDlv = rrStatus.top-g_window->dlv.Height()-pad;
	Require(SetWindowRect(g_window->dlv.hWnd, pad, cyDlv, rc.right-pad, rrStatus.top-pad));
	Require(SetWindowRect(g_window->elv.hWnd, pad, pad, rc.right-pad, cyDlv-pad));
	g_window->dlv.ResizeColumns(rc.right-pad-pad);
	g_window->elv.ResizeColumns(rc.right-pad-pad);

	/* Resize status bar parts. */
	const int aParts[] = {rc.right-Dpi(55), rc.right};
	SendMessageW(g_hWndStatus, SB_SETPARTS,
	    sizeof(aParts), reinterpret_cast<LPARAM>(aParts));

	SendMessageW(g_window->hWnd, WM_SETREDRAW, TRUE, 0);
	RedrawWindow(g_window->hWnd, nullptr, nullptr,
	    RDW_ERASE|RDW_FRAME|RDW_INVALIDATE|RDW_ALLCHILDREN);
}

bool Dragger::IsDouble(const long time, const POINT& pt)
{
	const bool dbl = time-m_time0 <= static_cast<long>(GetDoubleClickTime())
	&& abs(pt.x-m_pt0.x) <= Metric<SM_CXDOUBLECLK>
	&& abs(pt.y-m_pt0.y) <= Metric<SM_CYDOUBLECLK>;
	m_time0 = time;
	m_pt0 = std::move(pt);
	return dbl;
}

bool Dragger::IsDown() const
{
	return GetKeyState(VK_LBUTTON) & 0x8000;
}

bool Dragger::HandleLButtonDown()
{
	POINT pt;
	Require(GetRelativeCursorPos(parent.hWnd, &pt));
	if (!InDragArea(pt.x, pt.y)) return false;

	if (IsDouble(GetMessageTime(), pt)) {
		m_bActive = false;
		Reset();
	} else
		m_bActive = true;

	return m_bActive;
}

bool Dragger::HandleSetCursor()
{
	POINT pt;
	Require(GetRelativeCursorPos(parent.hWnd, &pt));

	extern HCURSOR g_hcSizeNs;
	bool r = true;
	if (InDragArea(pt.x, pt.y))
		SetCursor(g_hcSizeNs);
	else
		r = false;
	if (!m_bActive)
		return r;
	Drag(pt.x, pt.y);
	if (!IsDown()) {
		m_bActive = false;
		Done();
	}
	return r;
}

bool DlvDragger::InDragArea(const int x, const int y) const
{
	RECT rrDlv;
	Require(GetRelativeRect(g_window->dlv.hWnd, &rrDlv));

	const int pad = EBIsThemeActive()? Dpi(6): 0;
	const int extra = EBIsThemeActive()? 0: Dpi(2);
	if (x < rrDlv.left || x > rrDlv.right) return false;
	if (y < rrDlv.top-pad*2-extra*3 || y > rrDlv.top+extra) return false;
	return true;
}

void DlvDragger::Drag(const int, const int y) const
{
	RECT rrDlv;
	Require(GetRelativeRect(g_window->dlv.hWnd, &rrDlv));

	if (y < Dpi(50) || y > rrDlv.bottom-Dpi(20)) return;

	int h;
	h = rrDlv.bottom-y;
	g_window->dlv.SetHeight(h);
	UpdateLayout();
	RedrawWindow(g_window->hWnd, nullptr, nullptr,
	    RDW_ERASE|RDW_FRAME|RDW_INVALIDATE|RDW_ALLCHILDREN|RDW_UPDATENOW);
}

void DlvDragger::Reset() const
{
	g_window->dlv.SetHeight(0);
	g_window->cfg.heightDlv = 0;
	UpdateLayout();
}

void DlvDragger::Done() const
{
	g_window->cfg.heightDlv = g_window->dlv.Height();
}