"""
Tests du module d'authentification automatique (core/auth).

Couvre :
- TOTPGenerator : génération, vérification, vecteurs de test RFC 6238
- CredentialVault : CRUD, chiffrement, persistance
- AuthHandler : détection d'écrans d'auth, génération d'actions
"""

import json
import os
import tempfile
import time

import pytest

from core.auth.credential_vault import CredentialVault, _HAS_FERNET
from core.auth.totp_generator import TOTPGenerator
from core.auth.auth_handler import AuthHandler, AuthRequest


# =========================================================================
# Tests TOTP
# =========================================================================


class TestTOTPGenerator:
    """Tests du générateur TOTP RFC 6238."""

    def test_generate_returns_6_digits(self):
        """Le code généré fait exactement 6 chiffres."""
        totp = TOTPGenerator("JBSWY3DPEHPK3PXP")
        code = totp.generate()
        assert len(code) == 6
        assert code.isdigit()

    def test_generate_deterministic(self):
        """Le même timestamp donne le même code."""
        totp = TOTPGenerator("JBSWY3DPEHPK3PXP")
        ts = 1700000000.0
        code1 = totp.generate(timestamp=ts)
        code2 = totp.generate(timestamp=ts)
        assert code1 == code2

    def test_verify_current_code(self):
        """Le code généré est validé par verify()."""
        totp = TOTPGenerator("JBSWY3DPEHPK3PXP")
        ts = time.time()
        code = totp.generate(timestamp=ts)
        assert totp.verify(code, timestamp=ts)

    def test_verify_rejects_wrong_code(self):
        """Un code incorrect est rejeté."""
        totp = TOTPGenerator("JBSWY3DPEHPK3PXP")
        # Utiliser un timestamp suffisamment grand pour éviter les problèmes
        # avec window=-1 (counter négatif)
        assert not totp.verify("000000", timestamp=1700000000.0)

    def test_verify_with_window(self):
        """La fenêtre de tolérance accepte les codes adjacents."""
        totp = TOTPGenerator("JBSWY3DPEHPK3PXP", interval=30)
        ts = 1700000000.0
        # Code de l'intervalle précédent
        prev_code = totp.generate(timestamp=ts - 30)
        assert totp.verify(prev_code, timestamp=ts, window=1)
        # Code de l'intervalle suivant
        next_code = totp.generate(timestamp=ts + 30)
        assert totp.verify(next_code, timestamp=ts, window=1)

    def test_verify_window_zero_strict(self):
        """Window=0 n'accepte que le code exact de l'intervalle courant."""
        totp = TOTPGenerator("JBSWY3DPEHPK3PXP", interval=30)
        ts = 1700000000.0
        code = totp.generate(timestamp=ts)
        assert totp.verify(code, timestamp=ts, window=0)
        prev_code = totp.generate(timestamp=ts - 30)
        assert not totp.verify(prev_code, timestamp=ts, window=0)

    def test_time_remaining_in_range(self):
        """time_remaining() retourne entre 1 et interval."""
        totp = TOTPGenerator("JBSWY3DPEHPK3PXP", interval=30)
        remaining = totp.time_remaining()
        assert 1 <= remaining <= 30

    def test_8_digits(self):
        """Support des codes à 8 chiffres."""
        totp = TOTPGenerator("JBSWY3DPEHPK3PXP", digits=8)
        code = totp.generate()
        assert len(code) == 8
        assert code.isdigit()

    def test_rfc6238_sha1_vector(self):
        """Vecteur de test RFC 6238 pour SHA1.

        Secret de test : "12345678901234567890" (ASCII)
        En base32 : "GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ"
        Timestamp : 59 → T = 59 // 30 = 1 → code attendu 287082
        """
        # Le secret ASCII "12345678901234567890" encodé en base32
        secret_b32 = "GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ"
        totp = TOTPGenerator(secret_b32, digits=8, interval=30, algorithm="SHA1")
        code = totp.generate(timestamp=59)
        assert code == "94287082"

    def test_rfc6238_sha1_vector_t1111111109(self):
        """Vecteur de test RFC 6238 — T=1111111109."""
        secret_b32 = "GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQ"
        totp = TOTPGenerator(secret_b32, digits=8, interval=30, algorithm="SHA1")
        code = totp.generate(timestamp=1111111109)
        assert code == "07081804"

    def test_rfc6238_sha256_vector(self):
        """Vecteur de test RFC 6238 pour SHA256.

        Secret 32 bytes : "12345678901234567890123456789012"
        En base32 : "GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQGEZA"
        Timestamp : 59 → code attendu 46119246
        """
        secret_b32 = "GEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQGEZDGNBVGY3TQOJQGEZA"
        totp = TOTPGenerator(secret_b32, digits=8, interval=30, algorithm="SHA256")
        code = totp.generate(timestamp=59)
        assert code == "46119246"

    def test_invalid_secret_raises(self):
        """Un secret invalide lève ValueError."""
        with pytest.raises(ValueError, match="base32 invalide"):
            TOTPGenerator("!!! not base32 !!!")

    def test_invalid_algorithm_raises(self):
        """Un algorithme inconnu lève ValueError."""
        with pytest.raises(ValueError, match="non supporté"):
            TOTPGenerator("JBSWY3DPEHPK3PXP", algorithm="MD5")

    def test_secret_with_spaces(self):
        """Les espaces dans le secret sont tolérés."""
        totp1 = TOTPGenerator("JBSWY3DPEHPK3PXP")
        totp2 = TOTPGenerator("JBSW Y3DP EHPK 3PXP")
        ts = 1700000000.0
        assert totp1.generate(timestamp=ts) == totp2.generate(timestamp=ts)

    def test_zero_padded_code(self):
        """Les codes courts sont zero-padded (ex: 003271 et non 3271)."""
        totp = TOTPGenerator("JBSWY3DPEHPK3PXP")
        # Tester beaucoup de timestamps pour trouver un code qui commence par 0
        for ts in range(1700000000, 1700001000, 30):
            code = totp.generate(timestamp=float(ts))
            assert len(code) == 6, f"Code {code!r} n'a pas 6 chiffres pour ts={ts}"


# =========================================================================
# Tests CredentialVault
# =========================================================================


class TestCredentialVault:
    """Tests du coffre-fort chiffré."""

    def test_create_add_get(self):
        """Créer un vault, ajouter un credential, le récupérer."""
        with tempfile.NamedTemporaryFile(suffix=".enc", delete=False) as f:
            vault_path = f.name
        try:
            os.unlink(vault_path)  # Supprimer pour que le vault se crée
            vault = CredentialVault(vault_path, "test_password")
            vault.add_credential("TestApp", "login", {
                "username": "user1",
                "password": "pass1",
            })
            cred = vault.get_credential("TestApp", "login")
            assert cred is not None
            assert cred["username"] == "user1"
            assert cred["password"] == "pass1"
        finally:
            if os.path.exists(vault_path):
                os.unlink(vault_path)

    def test_save_and_reload(self):
        """Sauvegarder et recharger un vault préserve les données."""
        with tempfile.NamedTemporaryFile(suffix=".enc", delete=False) as f:
            vault_path = f.name
        try:
            os.unlink(vault_path)
            vault = CredentialVault(vault_path, "master123")
            vault.add_credential("MyApp", "login", {
                "username": "admin",
                "password": "secret",
            })
            vault.add_credential("MyApp", "totp_seed", {
                "secret": "JBSWY3DPEHPK3PXP",
                "digits": 6,
                "interval": 30,
                "algorithm": "SHA1",
            })
            vault.save()

            # Recharger
            vault2 = CredentialVault(vault_path, "master123")
            assert vault2.list_apps() == ["MyApp"]
            login = vault2.get_credential("MyApp", "login")
            assert login["username"] == "admin"
            totp = vault2.get_credential("MyApp", "totp_seed")
            assert totp["secret"] == "JBSWY3DPEHPK3PXP"
        finally:
            if os.path.exists(vault_path):
                os.unlink(vault_path)

    def test_remove_credential(self):
        """Supprimer un credential fonctionne."""
        with tempfile.NamedTemporaryFile(suffix=".enc", delete=False) as f:
            vault_path = f.name
        try:
            os.unlink(vault_path)
            vault = CredentialVault(vault_path, "pw")
            vault.add_credential("App1", "login", {"username": "u", "password": "p"})
            assert vault.remove_credential("App1", "login") is True
            assert vault.get_credential("App1", "login") is None
            assert vault.list_apps() == []
        finally:
            if os.path.exists(vault_path):
                os.unlink(vault_path)

    def test_remove_nonexistent(self):
        """Supprimer un credential inexistant retourne False."""
        with tempfile.NamedTemporaryFile(suffix=".enc", delete=False) as f:
            vault_path = f.name
        try:
            os.unlink(vault_path)
            vault = CredentialVault(vault_path, "pw")
            assert vault.remove_credential("NopApp", "login") is False
        finally:
            if os.path.exists(vault_path):
                os.unlink(vault_path)

    def test_list_apps_sorted(self):
        """list_apps() retourne les apps triées."""
        with tempfile.NamedTemporaryFile(suffix=".enc", delete=False) as f:
            vault_path = f.name
        try:
            os.unlink(vault_path)
            vault = CredentialVault(vault_path, "pw")
            vault.add_credential("Zebra", "login", {"username": "z", "password": "z"})
            vault.add_credential("Alpha", "login", {"username": "a", "password": "a"})
            vault.add_credential("Middle", "login", {"username": "m", "password": "m"})
            assert vault.list_apps() == ["Alpha", "Middle", "Zebra"]
        finally:
            if os.path.exists(vault_path):
                os.unlink(vault_path)

    def test_invalid_credential_type(self):
        """Un type de credential invalide lève ValueError."""
        with tempfile.NamedTemporaryFile(suffix=".enc", delete=False) as f:
            vault_path = f.name
        try:
            os.unlink(vault_path)
            vault = CredentialVault(vault_path, "pw")
            with pytest.raises(ValueError, match="invalide"):
                vault.add_credential("App1", "invalid_type", {})
        finally:
            if os.path.exists(vault_path):
                os.unlink(vault_path)

    def test_encryption_on_disk(self):
        """Le fichier vault sur disque ne contient pas de texte en clair."""
        with tempfile.NamedTemporaryFile(suffix=".enc", delete=False) as f:
            vault_path = f.name
        try:
            os.unlink(vault_path)
            vault = CredentialVault(vault_path, "strong_password_42")
            vault.add_credential("SecretApp", "login", {
                "username": "robot_lea",
                "password": "super_secret_password_xyz",
            })
            vault.save()

            # Lire le fichier brut
            raw_bytes = open(vault_path, "rb").read()
            raw_str = raw_bytes.decode("latin-1")  # Pour chercher du texte ASCII

            # Les données sensibles ne doivent PAS apparaître en clair
            assert "robot_lea" not in raw_str
            assert "super_secret_password_xyz" not in raw_str
            assert "SecretApp" not in raw_str
        finally:
            if os.path.exists(vault_path):
                os.unlink(vault_path)

    def test_wrong_password_raises(self):
        """Un mauvais mot de passe empêche le déchiffrement."""
        with tempfile.NamedTemporaryFile(suffix=".enc", delete=False) as f:
            vault_path = f.name
        try:
            os.unlink(vault_path)
            vault = CredentialVault(vault_path, "correct_password")
            vault.add_credential("App", "login", {"username": "u", "password": "p"})
            vault.save()

            # Tenter de charger avec un mauvais mot de passe
            with pytest.raises(ValueError, match="[Mm]ot de passe|corrompu"):
                CredentialVault(vault_path, "wrong_password")
        finally:
            if os.path.exists(vault_path):
                os.unlink(vault_path)

    def test_multiple_credential_types_per_app(self):
        """Une app peut avoir plusieurs types de credentials."""
        with tempfile.NamedTemporaryFile(suffix=".enc", delete=False) as f:
            vault_path = f.name
        try:
            os.unlink(vault_path)
            vault = CredentialVault(vault_path, "pw")
            vault.add_credential("DPI", "login", {
                "username": "lea", "password": "p"
            })
            vault.add_credential("DPI", "totp_seed", {
                "secret": "JBSWY3DPEHPK3PXP"
            })
            assert vault.list_credential_types("DPI") == ["login", "totp_seed"]
            assert vault.get_credential("DPI", "login")["username"] == "lea"
            assert vault.get_credential("DPI", "totp_seed")["secret"] == "JBSWY3DPEHPK3PXP"
        finally:
            if os.path.exists(vault_path):
                os.unlink(vault_path)


# =========================================================================
# Tests AuthHandler
# =========================================================================


class TestAuthHandler:
    """Tests du gestionnaire d'authentification."""

    @pytest.fixture
    def vault_with_creds(self, tmp_path):
        """Vault avec des credentials de test."""
        vault_path = str(tmp_path / "test_vault.enc")
        vault = CredentialVault(vault_path, "test_pw")
        vault.add_credential("DPI_Crossway", "login", {
            "username": "robot_lea",
            "password": "secret123",
            "domain": "HOPITAL",
        })
        vault.add_credential("DPI_Crossway", "totp_seed", {
            "secret": "JBSWY3DPEHPK3PXP",
            "digits": 6,
            "interval": 30,
            "algorithm": "SHA1",
        })
        vault.add_credential("Outlook", "login", {
            "username": "lea@hopital.fr",
            "password": "outlook_pass",
        })
        return vault

    @pytest.fixture
    def handler(self, vault_with_creds):
        return AuthHandler(vault_with_creds)

    def test_detect_login_screen(self, handler):
        """Détecter un écran de login classique."""
        screen_state = {
            "perception": {
                "detected_text": [
                    "Bienvenue sur DPI Crossway",
                    "Identifiant",
                    "Mot de passe",
                    "Se connecter",
                ],
            },
            "ui_elements": [
                {"type": "text_input", "role": "text", "label": "Identifiant", "center": [500, 300], "element_id": "e1", "tags": []},
                {"type": "text_input", "role": "password", "label": "Mot de passe", "center": [500, 350], "element_id": "e2", "tags": []},
                {"type": "button", "role": "primary_action", "label": "Se connecter", "center": [500, 420], "element_id": "e3", "tags": []},
            ],
            "window": {"app_name": "DPI_Crossway", "window_title": "DPI Crossway - Connexion"},
        }

        auth_req = handler.detect_auth_screen(screen_state)
        assert auth_req is not None
        assert auth_req.auth_type == "login"
        assert auth_req.app_name == "DPI_Crossway"
        assert auth_req.confidence >= 0.6  # Plusieurs signaux

    def test_detect_totp_screen(self, handler):
        """Détecter un écran 2FA/TOTP (sans éléments de login)."""
        screen_state = {
            "perception": {
                "detected_text": [
                    "Entrez votre code 2FA",
                    "Code à 6 chiffres",
                ],
            },
            "ui_elements": [
                {"type": "text_input", "role": "text", "label": "Code OTP", "center": [500, 350], "element_id": "e1", "tags": []},
                {"type": "button", "role": "primary_action", "label": "Confirmer", "center": [500, 420], "element_id": "e2", "tags": []},
            ],
            "window": {"app_name": "DPI_Crossway"},
        }

        auth_req = handler.detect_auth_screen(screen_state)
        assert auth_req is not None
        assert auth_req.auth_type == "totp"
        assert auth_req.confidence >= 0.3

    def test_detect_login_and_totp(self, handler):
        """Détecter un écran combiné login + TOTP."""
        screen_state = {
            "perception": {
                "detected_text": [
                    "Connexion sécurisée",
                    "Identifiant",
                    "Mot de passe",
                    "Code OTP",
                ],
            },
            "ui_elements": [
                {"type": "text_input", "role": "text", "label": "Identifiant", "center": [500, 300], "element_id": "e1", "tags": []},
                {"type": "text_input", "role": "password", "label": "Mot de passe", "center": [500, 350], "element_id": "e2", "tags": []},
                {"type": "text_input", "role": "text", "label": "Code OTP", "center": [500, 400], "element_id": "e3", "tags": []},
                {"type": "button", "role": "primary_action", "label": "Valider", "center": [500, 450], "element_id": "e4", "tags": []},
            ],
            "window": {"app_name": "DPI_Crossway"},
        }

        auth_req = handler.detect_auth_screen(screen_state)
        assert auth_req is not None
        assert auth_req.auth_type == "login_and_totp"
        assert auth_req.confidence >= 0.85  # Beaucoup de signaux

    def test_no_auth_on_normal_screen(self, handler):
        """Un écran normal ne déclenche pas de détection."""
        screen_state = {
            "perception": {
                "detected_text": ["Patient: Jean Dupont", "Dossier médical", "Résultats"],
            },
            "ui_elements": [
                {"type": "button", "role": "navigation", "label": "Suivant", "center": [500, 500], "element_id": "e1", "tags": []},
            ],
            "window": {"app_name": "DPI_Crossway"},
        }

        auth_req = handler.detect_auth_screen(screen_state)
        assert auth_req is None

    def test_get_auth_actions_login(self, handler):
        """Générer les actions pour un login classique."""
        auth_req = AuthRequest(
            auth_type="login",
            app_name="DPI_Crossway",
            detected_fields={
                "username_field": {"type": "text_input", "label": "Identifiant", "center": [500, 300], "element_id": "e1"},
                "password_field": {"type": "text_input", "label": "Mot de passe", "center": [500, 350], "element_id": "e2"},
                "submit_button": {"type": "button", "label": "Se connecter", "center": [500, 420], "element_id": "e3"},
            },
            confidence=0.85,
        )

        actions = handler.get_auth_actions(auth_req)
        assert len(actions) > 0

        # Vérifier la séquence : click username, type username, click password, type password, click submit, wait
        action_types = [(a["type"], a.get("text", "")) for a in actions]

        # Il doit y avoir des clics et des saisies
        has_click = any(a["type"] == "click" for a in actions)
        has_type = any(a["type"] == "type_text" for a in actions)
        has_wait = any(a["type"] == "wait" for a in actions)
        assert has_click
        assert has_type
        assert has_wait

        # Vérifier que le username et password sont ceux du vault
        typed_texts = [a["text"] for a in actions if a["type"] == "type_text"]
        assert "robot_lea" in typed_texts
        assert "secret123" in typed_texts

        # Toutes les actions ont le flag _auth_action
        for action in actions:
            assert action.get("_auth_action") is True

    def test_get_auth_actions_totp(self, handler):
        """Générer les actions pour une auth TOTP."""
        auth_req = AuthRequest(
            auth_type="totp",
            app_name="DPI_Crossway",
            detected_fields={
                "otp_field": {"type": "text_input", "label": "Code", "center": [500, 350], "element_id": "e1"},
                "submit_button": {"type": "button", "label": "Valider", "center": [500, 420], "element_id": "e2"},
            },
            confidence=0.85,
        )

        actions = handler.get_auth_actions(auth_req)
        assert len(actions) > 0

        # Vérifier qu'un code TOTP est tapé (6 chiffres)
        typed_texts = [a["text"] for a in actions if a["type"] == "type_text"]
        assert len(typed_texts) >= 1
        totp_code = typed_texts[0]
        assert len(totp_code) == 6
        assert totp_code.isdigit()

    def test_get_auth_actions_login_and_totp(self, handler):
        """Générer les actions pour login + TOTP combiné."""
        auth_req = AuthRequest(
            auth_type="login_and_totp",
            app_name="DPI_Crossway",
            detected_fields={
                "username_field": {"type": "text_input", "label": "Identifiant", "center": [500, 300], "element_id": "e1"},
                "password_field": {"type": "text_input", "label": "Mot de passe", "center": [500, 350], "element_id": "e2"},
                "otp_field": {"type": "text_input", "label": "Code OTP", "center": [500, 400], "element_id": "e3"},
                "submit_button": {"type": "button", "label": "Valider", "center": [500, 450], "element_id": "e4"},
            },
            confidence=0.95,
        )

        actions = handler.get_auth_actions(auth_req)
        assert len(actions) > 0

        typed_texts = [a["text"] for a in actions if a["type"] == "type_text"]
        # username + password + TOTP code
        assert len(typed_texts) >= 3
        assert "robot_lea" in typed_texts
        assert "secret123" in typed_texts
        # Le 3e est un code TOTP à 6 chiffres
        totp_code = typed_texts[2]
        assert len(totp_code) == 6
        assert totp_code.isdigit()

    def test_get_auth_actions_missing_credentials(self, handler):
        """Si le vault n'a pas les credentials, retourne une liste vide."""
        auth_req = AuthRequest(
            auth_type="login",
            app_name="AppInconnue",
            detected_fields={
                "username_field": {"type": "text_input", "label": "Login", "center": [500, 300], "element_id": "e1"},
                "password_field": {"type": "text_input", "label": "Password", "center": [500, 350], "element_id": "e2"},
            },
            confidence=0.85,
        )

        actions = handler.get_auth_actions(auth_req)
        assert actions == []

    def test_detect_english_auth_screen(self, handler):
        """Détecter un écran d'auth en anglais."""
        screen_state = {
            "perception": {
                "detected_text": ["Sign in to your account", "Username", "Password"],
            },
            "ui_elements": [
                {"type": "text_input", "role": "text", "label": "Username", "center": [500, 300], "element_id": "e1", "tags": []},
                {"type": "text_input", "role": "password", "label": "Password", "center": [500, 350], "element_id": "e2", "tags": []},
                {"type": "button", "role": "primary_action", "label": "Sign in", "center": [500, 420], "element_id": "e3", "tags": []},
            ],
            "window": {"app_name": "Outlook"},
        }

        auth_req = handler.detect_auth_screen(screen_state)
        assert auth_req is not None
        assert auth_req.auth_type == "login"
        assert auth_req.app_name == "Outlook"

    def test_detect_password_tag(self, handler):
        """Détecter un champ password via les tags de l'élément UI."""
        screen_state = {
            "perception": {"detected_text": []},
            "ui_elements": [
                {"type": "text_input", "role": "text", "label": "", "center": [500, 300], "element_id": "e1", "tags": ["password"]},
            ],
            "window": {"app_name": "SomeApp"},
        }

        auth_req = handler.detect_auth_screen(screen_state)
        assert auth_req is not None
        assert "password_field" in auth_req.detected_fields