"""TDD — signature de trajectoire (Phase 0 ; primitive partagée SP-4 / SP-2 / compétences).

Propriété centrale : la signature identifie une TRAJECTOIRE (séquence d'actions sur des
cibles stables). Elle doit être **stable entre sessions** — donc indépendante des champs
session-spécifiques (IDs de nœuds, timestamps, coordonnées). C'est ce qui rend le
create-or-update (décision F1) possible : deux apprentissages du même parcours = même id.
"""

import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parents[2]))

from core.execution.trajectory_signature import trajectory_signature


def test_deterministic_same_sequence():
    steps = [
        {"action_type": "mouse_click", "target": "menu Fichier"},
        {"action_type": "text_input", "target": "champ recherche"},
    ]
    assert trajectory_signature(steps) == trajectory_signature(steps)


def test_ignores_session_specific_fields():
    """Deux sessions du MÊME parcours (mêmes action_type+target) mais IDs de nœuds /
    timestamps / coords différents → MÊME signature."""
    session_a = [
        {"action_type": "mouse_click", "target": "menu Fichier",
         "node_id": "n_abc", "timestamp": 1000, "x": 12, "y": 34},
        {"action_type": "text_input", "target": "champ recherche",
         "node_id": "n_def", "timestamp": 1100, "x": 50, "y": 60},
    ]
    session_b = [
        {"action_type": "mouse_click", "target": "menu Fichier",
         "node_id": "n_zzz", "timestamp": 9000, "x": 99, "y": 88},
        {"action_type": "text_input", "target": "champ recherche",
         "node_id": "n_yyy", "timestamp": 9100, "x": 11, "y": 22},
    ]
    assert trajectory_signature(session_a) == trajectory_signature(session_b)


def test_order_sensitive():
    a = [{"action_type": "mouse_click", "target": "A"},
         {"action_type": "text_input", "target": "B"}]
    b = list(reversed(a))
    assert trajectory_signature(a) != trajectory_signature(b)


def test_target_discriminates():
    a = [{"action_type": "mouse_click", "target": "bouton Valider"}]
    b = [{"action_type": "mouse_click", "target": "bouton Annuler"}]
    assert trajectory_signature(a) != trajectory_signature(b)


def test_returns_sha256_hex():
    sig = trajectory_signature([{"action_type": "mouse_click", "target": "x"}])
    assert len(sig) == 64
    assert all(c in "0123456789abcdef" for c in sig)