"""V5a conditions: blinded-attacker miss, invisible attacker, helpless, fascinated.

Canonical PF1e (Core Rulebook, Conditions): a blinded character's opponents
have total concealment against it (50% miss); an invisible attacker gains +2
on attack rolls and its target loses its Dexterity bonus to AC, while the
invisible creature itself has total concealment; melee attacks against a
helpless target gain +4 (ranged none); a fascinated creature cannot act.
"""

from __future__ import annotations

from pf1e_simulator.conditions import (
    CONDITIONS_BY_NAME,
    FASCINATED,
    HELPLESS,
    INVISIBLE,
)
from pf1e_simulator.models import AbilityScores, ACProfile, Combatant, Saves
from tests.test_accuracy_rules import (
    _add_condition,
    _bow,
    _combatant,
    _engine,
    _melee,
)
from tests.test_observation_enriched import _snapshot

# ── Rule A: blinded attacker suffers total concealment (50% miss) ────────────


def test_blinded_attacker_misses_on_low_d100() -> None:
    eng = _engine(
        [_combatant("atk"), _combatant("tgt")],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [15, 30],
    )
    a, t = eng._states
    _add_condition(a, "blinded")
    result = eng.resolve_attack(a, t, a.combatant.attacks[0])
    # roll 15 + bonus 5 = 20 beats AC 10 (B10 conformance: blinded carries NO
    # flat attack penalty — the 50% total-concealment miss below is the RAW
    # penalty), then d100 30 <= 50 misses.
    assert result.hit is True
    assert result.total == 20
    assert result.damage == 0
    assert t.hp == 100
    assert any("attacker blinded" in line and "misses" in line for line in eng._transcript)


def test_blinded_attacker_lands_on_high_d100() -> None:
    eng = _engine(
        [_combatant("atk"), _combatant("tgt")],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [15, 51, 4],
    )
    a, t = eng._states
    _add_condition(a, "blinded")
    result = eng.resolve_attack(a, t, a.combatant.attacks[0])
    assert result.hit is True
    assert result.damage == 4
    assert t.hp == 96
    assert any("attacker blinded" in line and "lands" in line for line in eng._transcript)


def test_blinded_attacker_d100_rolls_once_with_target_concealment() -> None:
    eng = _engine(
        [_combatant("atk"), _combatant("tgt")],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [15, 30],
    )
    a, t = eng._states
    _add_condition(a, "blinded")
    _add_condition(t, "blurred")
    result = eng.resolve_attack(a, t, a.combatant.attacks[0])
    # max(20, 50) = 50; a single d100 (30) consumes the queue exactly.
    assert result.hit is True
    assert result.damage == 0
    assert any("50%" in line for line in eng._transcript)


def test_blinded_attacker_cannot_sneak_attack() -> None:
    # PF1e (CRB Conditions — Blinded): "All opponents are considered to have
    # total concealment (50% miss chance) against the blinded character" — and
    # total concealment denies sneak attack (CRB rogue "Sneak Attack").
    eng = _engine(
        [
            _combatant("atk", features=("Sneak Attack",)),
            _combatant("tgt"),
        ],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [15, 51, 4],
    )
    a, t = eng._states
    _add_condition(a, "blinded")
    _add_condition(t, "flat_footed")
    result = eng.resolve_attack(a, t, a.combatant.attacks[0])
    # d20 15 + 5 = 20 hits; blinded d100 51 > 50 lands; base 1d6 = 4 only —
    # no sneak d6 is rolled despite the target being denied its Dex bonus.
    assert result.hit is True
    assert result.damage == 4
    assert not any("sneak" in line for line in eng._transcript)


def test_sighted_sneak_attack_control_when_not_blinded() -> None:
    eng = _engine(
        [
            _combatant("atk", features=("Sneak Attack",)),
            _combatant("tgt"),
        ],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [15, 3, 4],
    )
    a, t = eng._states
    _add_condition(t, "flat_footed")
    result = eng.resolve_attack(a, t, a.combatant.attacks[0])
    # Same swing without blinded: sneak applies (d20 15 hits, sneak d6 3,
    # base d6 4 -> 7 total).
    assert result.hit is True
    assert result.damage == 7
    assert any("sneak attack" in line for line in eng._transcript)


# ── Rule B: invisible attacker (+2 to hit, target loses Dex to AC) ───────────


def _dexterous_foe(cid: str) -> Combatant:
    """A foe whose AC profile bakes in a +3 Dexterity bonus (RAW-style totals)."""
    return Combatant(
        id=cid,
        name=cid,
        level=1,
        size="Medium",
        abilities=AbilityScores(
            str_score=10, dex_score=16, con_score=10,
            int_score=10, wis_score=10, cha_score=10,
        ),
        hp_max=100,
        ac=ACProfile(total=18, touch=15, flat_footed=15),
        bab=1,
        initiative_mod=0,
        speed_land_ft=30,
        saves=Saves(fort=0, ref=0, will=0),
        attacks=[_melee(cid)],
    )


def test_invisible_attacker_gains_plus2_and_denies_dex_ac() -> None:
    eng = _engine(
        [_combatant("atk"), _dexterous_foe("tgt")],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [10, 4],
    )
    a, t = eng._states
    _add_condition(a, "invisible")
    result = eng.resolve_attack(a, t, a.combatant.attacks[0])
    # roll 10 + bonus 5 + 2 (invisible) = 17 vs flat-footed AC 15 (Dex denied).
    assert result.total == 17
    assert result.ac == 15
    assert result.hit is True
    assert result.damage == 4


def test_visible_attacker_normal_attack_control() -> None:
    eng = _engine(
        [_combatant("atk"), _dexterous_foe("tgt")],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [10],
    )
    a, t = eng._states
    result = eng.resolve_attack(a, t, a.combatant.attacks[0])
    # No invisible: total 15 < full AC 18 -> miss, no damage roll consumed.
    assert result.total == 15
    assert result.ac == 18
    assert result.hit is False


def test_invisible_attacker_plus2_applies_to_crit_confirmation() -> None:
    eng = _engine(
        [_combatant("atk"), _dexterous_foe("tgt")],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [20, 10, 4],
    )
    a, t = eng._states
    _add_condition(a, "invisible")
    result = eng.resolve_attack(a, t, a.combatant.attacks[0])
    # Nat 20 threatens; confirm 10 + 5 + 2 = 17 >= 15 -> crit. Damage 4 x 2.
    assert result.hit is True
    assert result.crit is True
    assert result.damage == 8


# ── Rule C: melee +4 vs a helpless target (ranged none) ──────────────────────


def test_melee_vs_helpless_target_gains_plus4() -> None:
    eng = _engine(
        [_combatant("atk"), _combatant("tgt")],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [10, 4],
    )
    a, t = eng._states
    _add_condition(t, "helpless")
    result = eng.resolve_attack(a, t, a.combatant.attacks[0])
    # roll 10 + bonus 5 + 4 (helpless melee) = 19; AC = flat-footed 10 minus
    # the Dex-0 penalty (helpless target has effective Dexterity 0: -5).
    assert result.total == 19
    assert result.ac == 5
    assert result.hit is True


def test_melee_vs_helpless_plus4_applies_to_crit_confirmation() -> None:
    eng = _engine(
        [_combatant("atk"), _combatant("tgt")],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [20, 10, 4],
    )
    a, t = eng._states
    _add_condition(t, "helpless")
    result = eng.resolve_attack(a, t, a.combatant.attacks[0])
    # Confirm 10 + 5 + 4 = 19 >= 5 (flat-footed 10 - 5 Dex-0) -> crit.
    assert result.crit is True
    assert result.damage == 8


def test_ranged_vs_helpless_target_gets_no_bonus() -> None:
    eng = _engine(
        [_combatant("atk", attacks=(_bow("atk"),)), _combatant("tgt")],
        [(0, 0), (0, 4)],
        ["players", "monsters"],
        [10, 4],
    )
    a, t = eng._states
    _add_condition(t, "helpless")
    result = eng.resolve_attack(a, t, a.combatant.attacks[0])
    # Ranged: no +4 — roll 10 + bonus 5 = 15.
    assert result.total == 15
    assert result.hit is True


# ── Rule D: fascinated / helpless combatants cannot act ──────────────────────


def test_fascinated_combatant_turn_is_noop() -> None:
    eng = _engine(
        [_combatant("a"), _combatant("b")],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [],
    )
    a, _b = eng._states
    _add_condition(a, "fascinated")
    eng._take_turn(a)
    # An empty RNG queue was not consumed: the turn made no attack roll.
    assert any("a: wait (cannot act)" in line for line in eng._transcript)
    assert sum("attack" in line for line in eng._transcript) == 0


def test_helpless_combatant_turn_is_noop() -> None:
    eng = _engine(
        [_combatant("a"), _combatant("b")],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [],
    )
    a, _b = eng._states
    _add_condition(a, "helpless")
    eng._take_turn(a)
    assert any("a: wait (cannot act)" in line for line in eng._transcript)
    assert sum("attack" in line for line in eng._transcript) == 0


# ── Rule E: attacks against an invisible target have a 50% miss chance ───────


def test_attack_vs_invisible_target_misses_on_low_d100() -> None:
    eng = _engine(
        [_combatant("atk"), _combatant("tgt")],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [15, 30],
    )
    a, t = eng._states
    _add_condition(t, "invisible")
    result = eng.resolve_attack(a, t, a.combatant.attacks[0])
    # Hit (15 + 5 = 20 >= 10) but d100 30 <= 50 total concealment -> miss.
    assert result.hit is True
    assert result.damage == 0
    assert t.hp == 100
    assert any(
        "concealment vs tgt" in line and "50%" in line and "misses" in line
        for line in eng._transcript
    )


def test_attack_vs_invisible_target_lands_on_high_d100() -> None:
    eng = _engine(
        [_combatant("atk"), _combatant("tgt")],
        [(0, 0), (0, 1)],
        ["players", "monsters"],
        [15, 51, 4],
    )
    a, t = eng._states
    _add_condition(t, "invisible")
    result = eng.resolve_attack(a, t, a.combatant.attacks[0])
    assert result.hit is True
    assert result.damage == 4
    assert t.hp == 96


# ── Rule F: registration + snapshot exposure ─────────────────────────────────


def test_new_conditions_registered() -> None:
    assert CONDITIONS_BY_NAME["helpless"] is HELPLESS
    assert CONDITIONS_BY_NAME["fascinated"] is FASCINATED
    assert CONDITIONS_BY_NAME["invisible"] is INVISIBLE
    assert HELPLESS.cant_act is True
    assert HELPLESS.denies_dex_to_ac is True
    assert FASCINATED.cant_act is True
    assert INVISIBLE.miss_chance == 50


def test_snapshot_exposes_new_condition_definitions() -> None:
    eng = _engine(
        [_combatant("a"), _combatant("b")],
        [(0, 0), (0, 3)],
        ["players", "monsters"],
        [],
    )
    obs = _snapshot(eng, eng._states[0])
    defs = dict(obs["condition_definitions"])
    assert len(defs) == len(CONDITIONS_BY_NAME)
    assert defs["helpless"]["flags"] == ["denies_dex_to_ac", "cant_act"]
    assert defs["fascinated"]["flags"] == ["cant_act"]
    assert defs["invisible"]["miss_chance"] == 50