// Copyright (c) Warwick Allison, 1999.
// Qt4 conversion copyright (c) Ray Chason, 2012-2014.
// NetHack may be freely redistributed.  See license for details.

// qt_inv.cpp -- inventory usage window
//
// Essentially a "paper doll" style display.  [grep fodder]
//
// This is at the top center of the main window

extern "C" {
#include "hack.h"
}

#include "qt_pre.h"
#include <QtGui/QtGui>
#if QT_VERSION >= 0x050000
#include <QtWidgets/QtWidgets>
#endif
#include "qt_post.h"
#include "qt_inv.h"
#include "qt_glyph.h"
#include "qt_set.h"

namespace nethack_qt_ {

static struct obj *
find_tool(int tooltyp)
{
    struct obj *o;

    for (o = g.invent; o; o = o->nobj) {
        if ((tooltyp == LEASH && o->otyp == LEASH && o->leashmon)
            // OIL_LAMP is used for candles, lamps, lantern, candelabrum too
            || (tooltyp == OIL_LAMP && o->lamplit))
            break;
    }
    return o;
}

NetHackQtInvUsageWindow::NetHackQtInvUsageWindow(QWidget* parent) :
    QWidget(parent)
{
    setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
}

void NetHackQtInvUsageWindow::drawWorn(QPainter& painter, obj* nhobj,
                                       int x, int y, bool canbe)
{
    short int glyph;
    if (nhobj)
	glyph=obj_to_glyph(nhobj, rn2_on_display_rng);
    else if (canbe)
	glyph=cmap_to_glyph(S_room);
    else
	glyph=cmap_to_glyph(S_stone);

    qt_settings->glyphs().drawCell(painter,glyph,x,y);
}

void NetHackQtInvUsageWindow::paintEvent(QPaintEvent*)
{
    //    0 1 2      two        dual
    //               hander     wielding
    // 0  x H b      x H b      . H b
    // 1  S " w      W " W      X " w
    // 2  G C q      G C q      G C q
    // 3  = A =      = A =      = A =
    // 4  l U L      l U L      l U L
    // 5  . F .      . F .      . F .
    //
    // 3.7: use a different legend for the layout
    //      show quiver instead of repeating gloves on both sides;
    //      show secondary weapon in shield slot when two-weapon is active;
    //      show two-handed primary weapon in both shield and uwep slots;
    //      show lit lamp/lantern/candle/candelabrum on lower right side;
    //      show leash-in-use on lower left side

    QPainter painter;
    painter.begin(this);

    // Blanks
    drawWorn(painter, 0, 0, 5, false);
    drawWorn(painter, 0, 2, 5, false);
    if (u.twoweap) // empty alt weapon slot, show uswapwep in shield slot
        drawWorn(painter, 0, 0, 0, false);

    // TODO: render differently if known to be non-removable (known cursed)
    drawWorn(painter, uarm,     1, 3); // Armour
    drawWorn(painter, uarmc,    1, 2); // Cloak
    drawWorn(painter, uarmh,    1, 0); // Helmet
    // shield slot varies depending upon weapon usage
    if (u.twoweap)
        drawWorn(painter, uswapwep, 0, 1); // Secondary weapon, in use
    else if (uwep && bimanual(uwep))
        drawWorn(painter, uwep,     0, 1); // Two-handed weapon shown twice
    else
        drawWorn(painter, uarms,    0, 1); // Shield (might be blank)
    drawWorn(painter, uarmg,    0, 2); // Gloves
    drawWorn(painter, uarmf,    1, 5); // Shoes (feet)
    drawWorn(painter, uarmu,    1, 4); // Undershirt
    drawWorn(painter, uleft,    0, 3); // RingL
    drawWorn(painter, uright,   2, 3); // RingR

    drawWorn(painter, uwep,     2, 1); // Weapon
    drawWorn(painter, !u.twoweap ? uswapwep : NULL, 0, 0); // Alternate weapon
    drawWorn(painter, uquiver,  2, 2); // Quiver
    drawWorn(painter, uamul,    1, 1); // Amulet
    drawWorn(painter, ublindf,  2, 0); // Blindfold/Towel/Lenses

    // light source and leash aren't unique and don't have pointers defined
    drawWorn(painter, find_tool(LEASH),    0, 4);
    // OIL_LAMP matches lit candles, lamps, lantern, and candelabrum (and will
    // also duplicate Sunsword when it is wielded and shown in the uwep slot)
    drawWorn(painter, find_tool(OIL_LAMP), 2, 4);

    painter.end();
}

QSize NetHackQtInvUsageWindow::sizeHint(void) const
{
    if (qt_settings) {
	return QSize(qt_settings->glyphs().width()*3,
		     qt_settings->glyphs().height()*6);
    } else {
	return QWidget::sizeHint();
    }
}

} // namespace nethack_qt_