{{
function callback.nemelex_gamble_announce(data,triggerable,triggerer,marker,ev)
    if not dgn.persist.nemelex_gamble_announced then
        dgn.persist.nemelex_gamble_announced = true
        local msg = {
            "\"Care to risk it all for some fabulous prizes, mortal?\"",
            "\"Through this portal lies a prize... or peril!\"",
            "\"The prize could be yours... at the risk of your life!\"",
            "\"Care for a little wager, mortal?\""
        }
        crawl.god_speaks("Nemelex Xobeh", "Nemelex Xobeh says, " ..
                         msg[crawl.random_range(1, 4)])
        crawl.god_speaks("Nemelex Xobeh", "\"Beware! This is a limited " ..
                         "time offer!\"")
    end
end

function nemelex_gamble_make_transporter(exit_prop, cleanup_prop)
    trans_loc = dgn.find_marker_positions_by_prop(exit_prop, 1)[1]
    dest_loc = dgn.find_marker_positions_by_prop("the_gamble_entry", 1)[1]
    dgn.place_transporter(trans_loc.x, trans_loc.y, dest_loc.x, dest_loc.y)
    if (you.see_cell(trans_loc.x, trans_loc.y)) then
        crawl.mpr("A transporter appears.")
    end
    cleanup_loc = dgn.find_marker_positions_by_prop(cleanup_prop, 1)[1]
    dgn.terrain_changed(cleanup_loc.x, cleanup_loc.y, "floor", false)
end

function nemelex_gamble_remove_transporter()
    slave = dgn.find_marker_positions_by_prop("the_gamble_entry", 1)
    dgn.terrain_changed(slave[1].x, slave[1].y, "floor", false)
    if (you.see_cell(slave[1].x, slave[1].y)) then
        crawl.mpr("<white>The transporter glows with a rainbow of weird " ..
                  "colours and disappears.</white>")
    end
end

function callback.nemelex_gamble_prize(data,triggerable,triggerer,marker,ev)
    if dgn.persist.nemelex_gamble_triggered then
        return
    end

    crawl.god_speaks("Nemelex Xobeh", "Nemelex Xobeh says, \"You win!\"")
    nemelex_gamble_make_transporter("the_gamble_prize",
                                    "the_gamble_peril_landing")
    dgn.persist.nemelex_gamble_triggered = true
end

function callback.nemelex_gamble_peril(data,triggerable,triggerer,marker,ev)
    if dgn.persist.nemelex_gamble_triggered then
        return
    end

    crawl.god_speaks("Nemelex Xobeh", "Nemelex Xobeh says, \"You lose!\"")
    nemelex_gamble_make_transporter("the_gamble_peril",
                                    "the_gamble_prize_landing")
    dgn.persist.nemelex_gamble_triggered = true
end

function callback.nemelex_gamble_expire(data,triggerable,triggerer,marker,ev)
    if dgn.persist.nemelex_gamble_triggered then
        return
    end

    if not dgn.persist.nemelex_gamble_announced then
        return
    end

    data.dur = data.dur - ev:ticks()
    if data.dur > 0 then
        return
    end

    dgn.persist.nemelex_gamble_triggered = true
    nemelex_gamble_remove_transporter()
end
}}

NAME:   grunt_nemelex_the_gamble
TAGS:   temple_overflow_nemelex_xobeh temple_overflow_1 no_trap_gen
TAGS:   no_monster_gen no_item_gen
WEIGHT: 2
ITEM:   unobtainable any, unobtainable superb_item
{{
    dgn.persist.nemelex_gamble_announced = false
    dgn.persist.nemelex_gamble_triggered = false

    local announce_marker = TriggerableFunction:new {
        func = "callback.nemelex_gamble_announce", repeated = true }
    announce_marker:add_triggerer(DgnTriggerer:new {type="player_los"})

    local prize_marker = TriggerableFunction:new {
        func = "callback.nemelex_gamble_prize"}
    prize_marker:add_triggerer(DgnTriggerer:new {type="player_move"})

    local peril_marker = TriggerableFunction:new {
        func = "callback.nemelex_gamble_peril"}
    peril_marker:add_triggerer(DgnTriggerer:new {type="player_move"})

    local expire_marker = TriggerableFunction:new {
        func = "callback.nemelex_gamble_expire",
        repeated = true, data={dur=500 + crawl.random2(500)} }
    expire_marker:add_triggerer(DgnTriggerer:new {type="turn"})

    lua_marker('J', props_marker{the_gamble_entry=1})
    lua_marker('J', expire_marker)
    lua_marker('K', prize_marker)
    lua_marker('K', props_marker{the_gamble_prize_landing=1})
    lua_marker('L', peril_marker)
    lua_marker('L', props_marker{the_gamble_peril_landing=1})
    lua_marker('M', props_marker{the_gamble_prize=1})
    lua_marker('N', props_marker{the_gamble_peril=1})
    lua_marker('_', announce_marker)
}}
SHUFFLE: KL
KFEAT:  _ = altar_nemelex_xobeh
MARKER: J = lua:transp_loc("the_gamble_entry")
MARKER: K = lua:transp_dest_loc("the_gamble_entry")
KFEAT:  L = transporter_landing
KPROP:  KLMNOU89' = no_tele_into
NSUBST: " = 3:d / e / '
MARKER: Q = lua:fog_machine { cloud_type = "magical condensation", \
                              pow_min = 10, pow_max = 10, delay = 10, \
                              size = 1, walk_dist = 0 }
MAP
xxxxxxxxxxxxxxxxxxx
xXXXXXXXxxxXXXXXXXx
xXU'K'UoQJQoU'L'UXx
xX'"""'o._.o'''''Xx
xX'"G"'o...o'8'9'Xx
xX'"""'o...o'''''Xx
xXU'M'Uo...oU'N'UXx
xXXXXXXX...XXXXXXXx
xxxxxxxxx+xxxxxxxxx
ENDMAP
