"""Unit tests for Product.to_llm_context() — no database required."""
from uuid import uuid4

import pytest

from innercontext.models import Product
from innercontext.models.enums import (
    DayTime,
    IngredientFunction,
    InteractionScope,
    ProductCategory,
    RoutineRole,
)
from innercontext.models.product import (
    ActiveIngredient,
    ProductContext,
    ProductEffectProfile,
    ProductInteraction,
)


def _make(**kwargs):
    defaults = dict(
        id=uuid4(),
        name="Test",
        brand="B",
        category=ProductCategory.MOISTURIZER,
        routine_role=RoutineRole.SEAL,
        recommended_time=DayTime.BOTH,
        leave_on=True,
    )
    defaults.update(kwargs)
    return Product(**defaults)


# ---------------------------------------------------------------------------
# Always-present keys
# ---------------------------------------------------------------------------


def test_always_present_keys():
    p = _make()
    ctx = p.to_llm_context()
    for key in ("id", "name", "brand", "category", "routine_role", "recommended_time", "leave_on"):
        assert key in ctx, f"Expected '{key}' in to_llm_context() output"


# ---------------------------------------------------------------------------
# Optional string fields
# ---------------------------------------------------------------------------


def test_optional_string_fields_absent_when_none():
    p = _make()
    ctx = p.to_llm_context()
    for key in ("line_name", "sku", "url", "barcode"):
        assert key not in ctx, f"'{key}' should not appear when None"


def test_optional_string_fields_present_when_set():
    p = _make(line_name="Hydrating", sku="CV-001", url="https://example.com", barcode="123456")
    ctx = p.to_llm_context()
    assert ctx["line_name"] == "Hydrating"
    assert ctx["sku"] == "CV-001"
    assert ctx["url"] == "https://example.com"
    assert ctx["barcode"] == "123456"


# ---------------------------------------------------------------------------
# pH handling
# ---------------------------------------------------------------------------


def test_ph_exact_collapses():
    p = _make(ph_min=5.5, ph_max=5.5)
    ctx = p.to_llm_context()
    assert "ph" in ctx
    assert ctx["ph"] == 5.5
    assert "ph_range" not in ctx
    assert "ph_min" not in ctx
    assert "ph_max" not in ctx


def test_ph_range():
    p = _make(ph_min=4.0, ph_max=6.0)
    ctx = p.to_llm_context()
    assert "ph_range" in ctx
    assert "4.0" in ctx["ph_range"]
    assert "6.0" in ctx["ph_range"]
    assert "ph" not in ctx


def test_ph_only_min():
    p = _make(ph_min=3.5, ph_max=None)
    ctx = p.to_llm_context()
    assert "ph_min" in ctx
    assert ctx["ph_min"] == 3.5
    assert "ph_range" not in ctx
    assert "ph" not in ctx


def test_ph_only_max():
    p = _make(ph_min=None, ph_max=7.0)
    ctx = p.to_llm_context()
    assert "ph_max" in ctx
    assert ctx["ph_max"] == 7.0
    assert "ph_range" not in ctx
    assert "ph" not in ctx


# ---------------------------------------------------------------------------
# Actives
# ---------------------------------------------------------------------------


def test_actives_pydantic_objects():
    ai = ActiveIngredient(
        name="Niacinamide",
        percent=10.0,
        functions=[IngredientFunction.NIACINAMIDE],
    )
    p = _make(actives=[ai])
    ctx = p.to_llm_context()
    assert "actives" in ctx
    a = ctx["actives"][0]
    assert a["name"] == "Niacinamide"
    assert a["percent"] == 10.0
    assert "niacinamide" in a["functions"]


def test_actives_raw_dicts():
    raw = {"name": "Retinol", "percent": 0.1, "functions": ["retinoid"]}
    p = _make(actives=[raw])
    ctx = p.to_llm_context()
    assert "actives" in ctx
    assert ctx["actives"][0] == raw


# ---------------------------------------------------------------------------
# Effect profile
# ---------------------------------------------------------------------------


def test_effect_profile_all_zeros_omitted():
    p = _make(product_effect_profile=ProductEffectProfile())
    ctx = p.to_llm_context()
    assert "effect_profile" not in ctx


def test_effect_profile_nonzero_included():
    ep = ProductEffectProfile(hydration_immediate=4, barrier_repair_strength=3)
    p = _make(product_effect_profile=ep)
    ctx = p.to_llm_context()
    assert "effect_profile" in ctx
    assert ctx["effect_profile"]["hydration_immediate"] == 4
    assert ctx["effect_profile"]["barrier_repair_strength"] == 3
    # Zero fields should not be present
    assert "retinoid_strength" not in ctx["effect_profile"]


# ---------------------------------------------------------------------------
# Incompatible_with
# ---------------------------------------------------------------------------


def test_incompatible_with_pydantic_objects():
    inc = ProductInteraction(
        target="AHA", scope=InteractionScope.SAME_DAY, reason="increases irritation"
    )
    p = _make(incompatible_with=[inc])
    ctx = p.to_llm_context()
    assert "incompatible_with" in ctx
    assert ctx["incompatible_with"][0] == "avoid AHA (same_day): increases irritation"


def test_incompatible_with_raw_dicts():
    raw = {"target": "Vitamin C", "scope": "same_step", "reason": None}
    p = _make(incompatible_with=[raw])
    ctx = p.to_llm_context()
    assert "incompatible_with" in ctx
    assert ctx["incompatible_with"][0] == "avoid Vitamin C (same_step)"


# ---------------------------------------------------------------------------
# Context rules
# ---------------------------------------------------------------------------


def test_context_rules_all_none_omitted():
    p = _make(context_rules=ProductContext())
    ctx = p.to_llm_context()
    assert "context_rules" not in ctx


def test_context_rules_with_value():
    p = _make(context_rules=ProductContext(safe_after_shaving=True, low_uv_only=True))
    ctx = p.to_llm_context()
    assert "context_rules" in ctx
    assert ctx["context_rules"]["safe_after_shaving"] is True
    assert ctx["context_rules"]["low_uv_only"] is True
    assert "safe_after_acids" not in ctx["context_rules"]


# ---------------------------------------------------------------------------
# Safety dict
# ---------------------------------------------------------------------------


def test_safety_dict_present_when_set():
    p = _make(fragrance_free=True, alcohol_denat_free=True)
    ctx = p.to_llm_context()
    assert "safety" in ctx
    assert ctx["safety"]["fragrance_free"] is True
    assert ctx["safety"]["alcohol_denat_free"] is True


# ---------------------------------------------------------------------------
# Empty vs non-empty lists
# ---------------------------------------------------------------------------


def test_empty_lists_omitted():
    p = _make(inci=[], targets=[])
    ctx = p.to_llm_context()
    assert "inci" not in ctx
    assert "targets" not in ctx


def test_nonempty_lists_included():
    p = _make(inci=["Water", "Glycerin"], targets=["acne", "redness"])
    ctx = p.to_llm_context()
    assert "inci" in ctx
    assert ctx["inci"] == ["Water", "Glycerin"]
    assert "targets" in ctx