"""Engine rules tests: costs, sigils, scales, foe machinery."""

import pytest

from scrypt.engine.cards import Card, CardInstance, Cost, CostType, make_card
from scrypt.engine.combat import (
    LANES,
    CombatState,
    IllegalMove,
    Phase,
    Result,
    ScriptedPlay,
)

BIT = make_card("bit", health=1)
DAEMON = make_card("daemon", power=1, health=2, cost=Cost(CostType.MEM, 1))
BRUTE = make_card("brute", power=3, health=2, cost=Cost(CostType.MEM, 2))
FLYER = make_card("flyer", power=2, health=1, cost=Cost(CostType.MEM, 1), sigils=("tunneling",))
WALL = make_card("wall", power=0, health=4, cost=Cost(CostType.MEM, 1), sigils=("packet_filter",))
SPLITTER = make_card("splitter", power=1, health=1, sigils=("forked",))
VENOM = make_card("venom", power=1, health=1, cost=Cost(CostType.MEM, 2), sigils=("null_pointer",))
SPIKES = make_card("spikes", power=0, health=3, sigils=("honeypot",))
GOAT = make_card("goat", power=0, health=1, cost=Cost(CostType.MEM, 1), sigils=("privileged",))
CAT = make_card("cat", power=0, health=1, cost=Cost(CostType.MEM, 1), sigils=("auto_restart",))
BREEDER = make_card("breeder", power=1, health=1, cost=Cost(CostType.MEM, 1), sigils=("self_replicating",))
DIGGER = make_card("digger", power=0, health=3, sigils=("scavenger_loop",))
BONEY = make_card("boney", power=2, health=3, cost=Cost(CostType.DUMPS, 4))


def fresh(script=None, main=None, side=None, seed=7) -> CombatState:
    return CombatState(
        main_deck=main if main is not None else [DAEMON] * 6,
        side_deck=side if side is not None else [BIT] * 10,
        script=script or [[]],
        seed=seed,
    )


def in_main(state: CombatState) -> CombatState:
    """Skip past the draw phase for board-setup tests."""
    if state.phase is Phase.DRAW:
        state.draw("side" if state.can_draw_side else "main")
    return state


def put(state, row, lane, card_spec):
    inst = CardInstance(spec=card_spec)
    getattr(state, row)[lane] = inst
    return inst


# ----------------------------------------------------------------- setup

def test_opening_hand_is_three_main_plus_one_bit():
    state = fresh()
    assert len(state.hand) == 4
    assert sum(1 for c in state.hand if c.spec.id == "bit") == 1


def test_turn_zero_script_reaches_front_row():
    raider = make_card("raider", power=1, health=1)
    state = fresh(script=[[ScriptedPlay(1, raider)], [ScriptedPlay(2, raider)]])
    assert state.foe_row[1] is not None and state.foe_row[1].spec.id == "raider"
    assert state.foe_queue[2] is not None


# ----------------------------------------------------------------- costs

def test_free_card_plays_without_sacrifice():
    state = in_main(fresh())
    state.hand.append(CardInstance(spec=BIT))
    state.play(len(state.hand) - 1, 0)
    assert state.player_row[0].spec.id == "bit"


def test_mem_cost_requires_sacrifice():
    state = in_main(fresh())
    state.hand.append(CardInstance(spec=DAEMON))
    with pytest.raises(IllegalMove):
        state.play(len(state.hand) - 1, 0)


def test_sacrifice_pays_mem_and_grants_dumps():
    state = in_main(fresh())
    put(state, "player_row", 2, BIT)
    state.hand.append(CardInstance(spec=DAEMON))
    state.play(len(state.hand) - 1, 0, sacrifices=(2,))
    assert state.player_row[2] is None
    assert state.player_row[0].spec.id == "daemon"
    assert state.dumps == 1


def test_can_play_into_lane_of_sacrificed_card():
    state = in_main(fresh())
    put(state, "player_row", 1, BIT)
    state.hand.append(CardInstance(spec=DAEMON))
    state.play(len(state.hand) - 1, 1, sacrifices=(1,))
    assert state.player_row[1].spec.id == "daemon"


def test_cannot_play_into_occupied_lane():
    state = in_main(fresh())
    put(state, "player_row", 1, BIT)
    state.hand.append(CardInstance(spec=BIT))
    with pytest.raises(IllegalMove):
        state.play(len(state.hand) - 1, 1)


def test_over_sacrifice_rejected():
    state = in_main(fresh())
    put(state, "player_row", 0, BIT)
    put(state, "player_row", 1, BIT)
    state.hand.append(CardInstance(spec=DAEMON))  # costs 1 mem
    with pytest.raises(IllegalMove, match="over-sacrifice"):
        state.play(len(state.hand) - 1, 2, sacrifices=(0, 1))


def test_privileged_is_worth_three():
    state = in_main(fresh())
    put(state, "player_row", 0, GOAT)
    state.hand.append(CardInstance(spec=BRUTE))  # costs 2 mem
    state.play(len(state.hand) - 1, 1, sacrifices=(0,))
    assert state.player_row[1].spec.id == "brute"


def test_auto_restart_survives_sacrifice():
    state = in_main(fresh())
    cat = put(state, "player_row", 0, CAT)
    state.hand.append(CardInstance(spec=DAEMON))
    state.play(len(state.hand) - 1, 1, sacrifices=(0,))
    assert state.player_row[0] is cat
    assert state.dumps == 0  # no death, no dump


def test_dump_cost_paid_from_pool():
    state = in_main(fresh())
    state.dumps = 4
    state.hand.append(CardInstance(spec=BONEY))
    state.play(len(state.hand) - 1, 0)
    assert state.dumps == 0
    state.hand.append(CardInstance(spec=BONEY))
    with pytest.raises(IllegalMove):
        state.play(len(state.hand) - 1, 1)


def test_self_replicating_adds_copy_to_hand():
    state = in_main(fresh())
    put(state, "player_row", 0, BIT)
    state.hand.append(CardInstance(spec=BREEDER))
    before = len(state.hand)
    state.play(len(state.hand) - 1, 1, sacrifices=(0,))
    assert len(state.hand) == before  # played one, gained one
    assert state.hand[-1].spec.id == "breeder"


# ----------------------------------------------------------------- combat

def test_unblocked_attack_tips_scale():
    state = in_main(fresh())
    put(state, "player_row", 0, BRUTE)
    state.ring_bell()
    assert state.scale == 3


def test_win_at_five_with_overkill_cycles():
    state = in_main(fresh())
    big = make_card("big", power=9, health=1)
    put(state, "player_row", 0, big)
    state.ring_bell()
    assert state.result is Result.PLAYER_WIN
    assert state.scale == 5
    assert state.overkill_cycles == 4


def test_loss_at_minus_five():
    state = in_main(fresh())
    crusher = make_card("crusher", power=5, health=5)
    put(state, "foe_row", 0, crusher)
    state.ring_bell()
    assert state.result is Result.PLAYER_LOSS


def test_blocked_attack_damages_card_not_scale():
    state = in_main(fresh())
    put(state, "player_row", 1, BRUTE)
    foe = put(state, "foe_row", 1, make_card("meat", power=0, health=5))
    state.ring_bell()
    assert foe.health == 2
    assert state.scale == 0


def test_tunneling_flies_over_blocker():
    state = in_main(fresh())
    put(state, "player_row", 0, FLYER)
    put(state, "foe_row", 0, make_card("meat", power=0, health=5))
    state.ring_bell()
    assert state.scale == 2


def test_packet_filter_blocks_tunneling():
    state = in_main(fresh())
    put(state, "player_row", 0, FLYER)
    wall = put(state, "foe_row", 0, WALL)
    state.ring_bell()
    assert state.scale == 0
    assert wall.health == 2


def test_forked_hits_adjacent_lanes_only():
    state = in_main(fresh())
    put(state, "player_row", 1, SPLITTER)
    left = put(state, "foe_row", 0, make_card("l", power=0, health=2))
    mid = put(state, "foe_row", 1, make_card("m", power=0, health=2))
    right = put(state, "foe_row", 2, make_card("r", power=0, health=2))
    state.ring_bell()
    assert left.health == 1 and right.health == 1
    assert mid.health == 2


def test_null_pointer_kills_any_size():
    state = in_main(fresh())
    put(state, "player_row", 0, VENOM)
    put(state, "foe_row", 0, make_card("giant", power=0, health=99))
    state.ring_bell()
    assert state.foe_row[0] is None


def test_honeypot_recoil_kills_fragile_attacker():
    state = in_main(fresh())
    put(state, "player_row", 0, make_card("soft", power=1, health=1))
    put(state, "foe_row", 0, SPIKES)
    state.ring_bell()
    assert state.player_row[0] is None
    assert state.dumps == 1  # player's card died


def test_player_death_grants_dumps_foe_death_does_not():
    state = in_main(fresh())
    put(state, "player_row", 0, BRUTE)  # kills foe meat: no dumps
    put(state, "foe_row", 0, make_card("meat", power=9, health=1))  # kills brute back? no — simultaneous? sequential.
    state.ring_bell()
    # Brute (3 power) kills meat (1 health) before meat ever swings.
    assert state.foe_row[0] is None
    assert state.dumps == 0


def test_scavenger_loop_yields_bone_each_turn():
    state = in_main(fresh())
    put(state, "player_row", 3, DIGGER)
    state.ring_bell()
    assert state.dumps == 1


def test_queue_advances_after_foe_turn():
    raider = make_card("raider", power=0, health=1)
    state = in_main(fresh(script=[[], [ScriptedPlay(0, raider)], []]))
    assert state.foe_queue[0] is not None
    state.ring_bell()
    assert state.foe_row[0] is not None
    assert state.foe_queue[0] is None


def test_draw_phase_enforced():
    state = fresh()
    with pytest.raises(IllegalMove):
        state.ring_bell()
    state.draw("main")
    assert state.phase is Phase.MAIN