"""Unit tests for the combatant loader feat resolution and feature/spell handling."""

from __future__ import annotations

import json
from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from pathlib import Path

from pf1e_simulator.abilities import (
    DODGE,
    IRON_WILL,
    POWER_ATTACK,
    toughness,
    weapon_focus,
)
from pf1e_simulator.loaders.combatant import (
    CombatantLoadError,
    MonsterLoadError,
    _resolve_feat,
    _resolve_features,
    load_combatant,
    load_monster,
)

# ── _resolve_feat ─────────────────────────────────────────────────────────────


class TestResolveFeat:
    def test_known_feat_returns_constant(self) -> None:
        assert _resolve_feat("Power Attack", 1) is POWER_ATTACK

    def test_known_feat_case_insensitive(self) -> None:
        assert _resolve_feat("power attack", 1) is POWER_ATTACK
        assert _resolve_feat("IRON WILL", 1) is IRON_WILL

    def test_toughness_uses_level(self) -> None:
        feat = _resolve_feat("Toughness", 5)
        assert feat.name == "Toughness"
        assert feat.category == "feat"
        assert feat.effects == toughness(5).effects

    def test_toughness_different_levels(self) -> None:
        low = _resolve_feat("Toughness", 1)
        high = _resolve_feat("Toughness", 10)
        assert low.effects != high.effects

    def test_weapon_focus_extracts_weapon(self) -> None:
        feat = _resolve_feat("Weapon Focus (Longsword)", 1)
        assert feat.effects == weapon_focus("Longsword").effects

    def test_weapon_focus_case_insensitive(self) -> None:
        feat = _resolve_feat("weapon focus (dagger)", 1)
        assert feat.effects == weapon_focus("dagger").effects

    def test_unknown_feat_returns_minimal_spec(self) -> None:
        feat = _resolve_feat("Lateral Thinking", 1)
        assert feat.name == "Lateral Thinking"
        assert feat.category == "feat"
        assert feat.effects == ()

    def test_unknown_feat_preserves_whitespace_stripping(self) -> None:
        feat = _resolve_feat("  Some Feat  ", 1)
        assert feat.name == "Some Feat"

    def test_dodge_and_alertness(self) -> None:
        assert _resolve_feat("Dodge", 1) is DODGE


# ── _resolve_features ─────────────────────────────────────────────────────────


class TestResolveFeatures:
    def test_filters_empty_and_whitespace(self) -> None:
        result = _resolve_features(["Power Attack", "", "  ", "Dodge"], 1)
        assert len(result) == 2
        assert result[0] is POWER_ATTACK
        assert result[1] is DODGE

    def test_filters_non_strings(self) -> None:
        result = _resolve_features(["Iron Will", 42, None, True], 1)  # type: ignore[list-item]
        assert len(result) == 1

    def test_empty_list(self) -> None:
        assert _resolve_features([], 1) == []

    def test_all_unknown(self) -> None:
        result = _resolve_features(["Feat A", "Feat B"], 1)
        assert len(result) == 2
        assert all(f.effects == () for f in result)


# ── load_combatant features+spells ────────────────────────────────────────────


def _write(tmp_path: Path, payload: dict[str, object]) -> Path:
    target = tmp_path / "combatant.json"
    target.write_text(json.dumps(payload), encoding="utf-8")
    return target


def _minimal_payload(**extra: object) -> dict[str, object]:
    base: dict[str, object] = {
        "name": "Tester",
        "level": 3,
        "abilities": {
            "str_score": 10, "dex_score": 10, "con_score": 10,
            "int_score": 10, "wis_score": 10, "cha_score": 10,
        },
        "hp_max": 10,
        "ac": {"total": 10, "touch": 10, "flat_footed": 10},
        "bab": 1,
        "initiative_mod": 0,
        "speed_land_ft": 30,
        "saves": {"fort": 0, "ref": 0, "will": 0},
        "attacks": [],
    }
    base.update(extra)
    return base


class TestFeatures:
    def test_known_feats_resolved(self, tmp_path: Path) -> None:
        data = _minimal_payload(features=["Power Attack", "Iron Will"])
        c = load_combatant(_write(tmp_path, data))
        assert len(c.features) == 2
        assert c.features[0] is POWER_ATTACK
        assert c.features[1] is IRON_WILL

    def test_unknown_feat_preserved(self, tmp_path: Path) -> None:
        data = _minimal_payload(features=["Some Unknown Feat"])
        c = load_combatant(_write(tmp_path, data))
        assert len(c.features) == 1
        assert c.features[0].name == "Some Unknown Feat"

    def test_toughness_receives_level(self, tmp_path: Path) -> None:
        data = _minimal_payload(level=7, features=["Toughness"])
        c = load_combatant(_write(tmp_path, data))
        assert c.features[0].effects == toughness(7).effects

    def test_level_default_one(self, tmp_path: Path) -> None:
        data = _minimal_payload(level=1, features=["Toughness"])
        c = load_combatant(_write(tmp_path, data))
        assert c.features[0].effects == toughness(1).effects

    def test_no_features_field(self, tmp_path: Path) -> None:
        data = _minimal_payload()
        c = load_combatant(_write(tmp_path, data))
        assert c.features == []

    def test_empty_features_list(self, tmp_path: Path) -> None:
        data = _minimal_payload(features=[])
        c = load_combatant(_write(tmp_path, data))
        assert c.features == []


class TestSpells:
    def test_spells_passed_through(self, tmp_path: Path) -> None:
        data = _minimal_payload(spells=["Magic Missile", "Shield"])
        c = load_combatant(_write(tmp_path, data))
        assert c.spells == ["Magic Missile", "Shield"]

    def test_no_spells_field(self, tmp_path: Path) -> None:
        data = _minimal_payload()
        c = load_combatant(_write(tmp_path, data))
        assert c.spells == []

    def test_empty_spells_list(self, tmp_path: Path) -> None:
        data = _minimal_payload(spells=[])
        c = load_combatant(_write(tmp_path, data))
        assert c.spells == []


class TestBackwardCompatAliases:
    def test_monster_load_error_is_combatant_load_error(self) -> None:
        assert MonsterLoadError is CombatantLoadError

    def test_load_monster_delegates(self, tmp_path: Path) -> None:
        data = _minimal_payload(name="Alias Test")
        c = load_monster(_write(tmp_path, data))
        assert c.name == "Alias Test"