"""Tests unitaires des outils du catalogue.

Ces tests sont FOURNIS COMPLETS — ils servent de spécification.
Ils doivent tous passer une fois vos outils implémentés.

Lancer : uv run pytest tests/unit/test_tools.py -v

Progression recommandée :
    1. Implémenter search_product → faire passer TestSearchProduct
    2. Implémenter calculate_price → faire passer TestCalculatePrice
    3. Implémenter list_products → faire passer TestListProducts
    4. Implémenter check_stock (bonus) → faire passer TestCheckStock
"""

import pytest

from src.tools.catalogue import (
    calculate_price,
    check_stock,
    list_products,
    search_product,
)


# ── search_product ────────────────────────────────────────────────────────────

class TestSearchProduct:

    def test_found_by_partial_name(self) -> None:
        result = search_product.invoke({"name": "laptop"})
        assert "Laptop Pro 15" in result
        assert "1299" in result

    def test_found_case_insensitive(self) -> None:
        assert "Souris Ergonomique" in search_product.invoke({"name": "SOURIS"})
        assert "Souris Ergonomique" in search_product.invoke({"name": "souris"})

    def test_not_found_returns_message(self) -> None:
        result = search_product.invoke({"name": "produit-xyz-inexistant"})
        assert "Aucun produit" in result

    def test_search_by_description_word(self) -> None:
        result = search_product.invoke({"name": "ergonomique"})
        assert "Souris Ergonomique" in result

    def test_multiple_results(self) -> None:
        # "casque" doit trouver au moins le casque audio
        result = search_product.invoke({"name": "casque"})
        assert "Casque Audio Pro" in result


# ── calculate_price ───────────────────────────────────────────────────────────

class TestCalculatePrice:

    def test_price_no_discount(self) -> None:
        result = calculate_price.invoke({"product_name": "souris", "quantity": 2})
        assert "99.80" in result   # 2 × 49.90

    def test_price_with_discount(self) -> None:
        result = calculate_price.invoke({
            "product_name": "souris", "quantity": 2, "discount_percent": 10.0
        })
        assert "89.82" in result   # 99.80 - 10%

    def test_quantity_one(self) -> None:
        result = calculate_price.invoke({"product_name": "clavier", "quantity": 1})
        assert "129" in result

    def test_invalid_quantity_zero(self) -> None:
        result = calculate_price.invoke({"product_name": "souris", "quantity": 0})
        assert "positif" in result.lower()

    def test_invalid_discount_over_100(self) -> None:
        result = calculate_price.invoke({
            "product_name": "souris", "quantity": 1, "discount_percent": 150.0
        })
        assert "100" in result

    def test_product_not_found(self) -> None:
        result = calculate_price.invoke({"product_name": "inexistant", "quantity": 1})
        assert "introuvable" in result.lower()

    def test_out_of_stock_warning(self) -> None:
        # enceinte-bluetooth est en stock=0
        result = calculate_price.invoke({"product_name": "enceinte", "quantity": 1})
        assert "rupture" in result.lower() or "RUPTURE" in result


# ── list_products ─────────────────────────────────────────────────────────────

class TestListProducts:

    def test_list_all(self) -> None:
        result = list_products.invoke({})
        assert "Laptop Pro 15" in result
        assert "Casque Audio Pro" in result

    def test_filter_informatique(self) -> None:
        result = list_products.invoke({"category": "informatique"})
        assert "Laptop Pro 15" in result
        assert "Souris" not in result

    def test_filter_audio(self) -> None:
        result = list_products.invoke({"category": "audio"})
        assert "Casque Audio Pro" in result
        assert "Laptop" not in result

    def test_filter_case_insensitive(self) -> None:
        assert "Casque" in list_products.invoke({"category": "AUDIO"})

    def test_unknown_category(self) -> None:
        result = list_products.invoke({"category": "meuble"})
        assert "meuble" in result.lower()

    def test_out_of_stock_shown(self) -> None:
        result = list_products.invoke({})
        assert "RUPTURE" in result   # enceinte-bluetooth stock=0


# ── check_stock (bonus) ────────────────────────────────────────────────────────

class TestCheckStock:

    def test_sufficient_stock(self) -> None:
        result = check_stock.invoke({"product_name": "souris", "required_quantity": 5})
        assert "possible" in result.lower() or "✅" in result

    def test_insufficient_stock(self) -> None:
        # écran-4k a stock=3, on en demande 10
        result = check_stock.invoke({"product_name": "ecran", "required_quantity": 10})
        assert "insuffisant" in result.lower() or "⚠" in result

    def test_out_of_stock(self) -> None:
        result = check_stock.invoke({"product_name": "enceinte", "required_quantity": 1})
        assert "RUPTURE" in result or "impossible" in result.lower()

    def test_invalid_quantity(self) -> None:
        result = check_stock.invoke({"product_name": "souris", "required_quantity": -1})
        assert "positif" in result.lower()

    def test_product_not_found(self) -> None:
        result = check_stock.invoke({"product_name": "xyz", "required_quantity": 1})
        assert "introuvable" in result.lower()