#include "AppHdr.h"

#include "actor.h"

#include "coord.h"
#include "losglobal.h"
#include "state.h"

bool actor::observable() const
{
    return crawl_state.game_is_arena() || is_player() || you.can_see(this);
}

bool actor::see_cell(const coord_def &p) const
{
    if (!in_bounds(pos()))
        return false; // actor is off the map

    return cell_see_cell(pos(), p, LOS_DEFAULT);
}

bool player::see_cell(const coord_def &p) const
{
    if (!map_bounds(p))
        return false; // Players can't see (-1,-1) but maybe can see (0,0).
    if (crawl_state.game_is_arena())
        return true;
    if (!in_bounds(pos()))
        return false; // A non-arena player at (0,0) can't see anything.
    if (xray_vision)
        return (pos() - p).abs() <= dist_range(current_vision);
    return actor::see_cell(p);
}

bool actor::can_see(const actor *target) const
{
    return target->visible_to(this) && see_cell(target->pos());
}

bool actor::see_cell_no_trans(const coord_def &p) const
{
    return cell_see_cell(pos(), p, LOS_NO_TRANS);
}

bool player::trans_wall_blocking(const coord_def &p) const
{
    return see_cell(p) && !see_cell_no_trans(p);
}

bool player::can_see(const actor* a) const
{
    if (crawl_state.game_is_arena() || crawl_state.arena_suspended)
        return see_cell(a->pos());
    else if (xray_vision)
        return see_cell(a->pos());
    else
        return actor::can_see(a);
}
