"""Tests for `app.core.state_validator`."""

from __future__ import annotations

from app.core.state_validator import apply_patch, validate_state, validate_world


def _character_schema():
    return [
        {
            "name": "player",
            "type": "object",
            "required": True,
            "properties": [
                {"name": "name", "type": "string", "required": True},
                {
                    "name": "stats",
                    "type": "object",
                    "required": True,
                    "properties": [
                        {"name": "health", "type": "integer", "required": True, "min": 0, "max": 100},
                        {"name": "mana", "type": "integer", "required": False, "min": 0, "max": 100},
                    ],
                },
                {"name": "inventory", "type": "array", "required": False},
            ],
        },
        {"name": "current_location", "type": "string", "required": True},
        {
            "name": "plot_rails",
            "type": "object",
            "required": True,
            "properties": [
                {"name": "hooks", "type": "array", "required": True},
                {"name": "current_goals", "type": "array", "required": True},
            ],
        },
    ]


def test_validate_state_ok():
    state = {
        "player": {
            "name": "Eric",
            "stats": {"health": 100, "mana": 10},
            "inventory": [],
        },
        "current_location": "Tavern",
        "plot_rails": {"hooks": [], "current_goals": ["survive"]},
    }
    ok, errors = validate_state(state, _character_schema())
    assert ok, errors


def test_validate_state_missing_required():
    state = {"player": {}, "current_location": "Tavern"}
    ok, errors = validate_state(state, _character_schema())
    assert not ok
    assert any("player" in e for e in errors) or any("plot_rails" in e for e in errors)


def test_validate_state_wrong_type():
    state = {
        "player": {"name": "Eric", "stats": {"health": "not a number"}},
        "current_location": "Tavern",
        "plot_rails": {"hooks": [], "current_goals": []},
    }
    ok, errors = validate_state(state, _character_schema())
    assert not ok
    assert any("health" in e for e in errors)


def test_validate_state_range_violation():
    state = {
        "player": {"name": "Eric", "stats": {"health": 200, "mana": 10}},
        "current_location": "Tavern",
        "plot_rails": {"hooks": [], "current_goals": []},
    }
    ok, errors = validate_state(state, _character_schema())
    assert not ok
    assert any("health" in e for e in errors)


def test_apply_patch_set_value():
    state = {"player": {"name": "Eric"}}
    new, errors = apply_patch(state, {"player.name": "Erik"})
    assert not errors
    assert new["player"]["name"] == "Erik"


def test_apply_patch_inc():
    state = {"player": {"stats": {"health": 50}}}
    new, errors = apply_patch(state, {"player.stats.health": {"op": "inc", "by": -10}})
    assert not errors
    assert new["player"]["stats"]["health"] == 40


def test_apply_patch_dec():
    state = {"player": {"stats": {"mana": 30}}}
    new, errors = apply_patch(state, {"player.stats.mana": {"op": "dec", "by": 5}})
    assert not errors
    assert new["player"]["stats"]["mana"] == 25


def test_apply_patch_append_to_list():
    state = {"player": {"inventory": []}}
    new, errors = apply_patch(
        state,
        {"player.inventory": {"op": "append", "value": {"item_id": "sword_01", "qty": 1}}},
    )
    assert not errors
    assert new["player"]["inventory"] == [{"item_id": "sword_01", "qty": 1}]


def test_apply_patch_remove_key():
    state = {"player": {"name": "Eric", "backstory": "mysterious"}}
    new, errors = apply_patch(state, {"player.backstory": {"op": "remove"}})
    assert not errors
    assert "backstory" not in new["player"]


def test_apply_patch_creates_nested_path():
    state = {"player": {}}
    new, errors = apply_patch(state, {"player.stats": {"health": 100, "mana": 10}})
    assert not errors
    assert new["player"]["stats"]["health"] == 100


def test_apply_patch_does_not_mutate_input():
    state = {"player": {"stats": {"health": 100}}}
    _ = apply_patch(state, {"player.stats.health": {"op": "inc", "by": -10}})
    # Original state unchanged
    assert state["player"]["stats"]["health"] == 100


def test_validate_world_ok():
    world = {
        "name": "Test world",
        "language": "en",
        "schemas": [{"type": "character", "properties": []}],
        "environment_schema": _character_schema(),
        "environment": {
            "player": {"name": "Eric", "stats": {"health": 100, "mana": 10}, "inventory": []},
            "current_location": "Tavern",
            "plot_rails": {"hooks": [], "current_goals": [], "completed_goals": []},
        },
        "plot_rails": {"hooks": [], "current_goals": [], "completed_goals": []},
        "current_time": "day_1_hour_8",
    }
    ok, errors = validate_world(world)
    assert ok, errors


def test_validate_world_invalid_time():
    world = {
        "name": "X",
        "language": "en",
        "schemas": [],
        "environment_schema": [],
        "environment": {},
        "plot_rails": {"hooks": [], "current_goals": [], "completed_goals": []},
        "current_time": "invalid_time",
    }
    ok, errors = validate_world(world)
    assert not ok
    assert any("time" in e.lower() for e in errors)