import pytest
import sys
import os
import time

sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))

# ── Import app FastAPI ────────────────────────────────────────
try:
    from fastapi.testclient import TestClient
    from api.main import app
    client = TestClient(app)
    APP_OK = True
except Exception as e:
    APP_OK = False

def skip_no_app():
    if not APP_OK:
        pytest.skip("App / BDD non disponible")


# ══════════════════════════════════════════════════════════════
#  PARTIE 1 — TESTS UNITAIRES (scraper CIR)
# ══════════════════════════════════════════════════════════════

class TestUnitairesExtractPagesText:
    """
    Tests unitaires de extract_pages_text()
    Réf. cir_scraper.py l.46 — extraction texte PDF
    """

    def test_bytes_vide_retourne_chaine_vide(self):
        """Bytes vides → '' sans crash"""
        from scrapers.cir_scraper import extract_pages_text
        assert extract_pages_text(b"") == ""

    def test_pdf_invalide_retourne_chaine_vide(self):
        """Contenu non-PDF → '' (le except l.57 fonctionne)"""
        from scrapers.cir_scraper import extract_pages_text
        assert extract_pages_text(b"ceci n est pas un pdf") == ""

    def test_retour_toujours_une_str(self):
        """La fonction retourne toujours str, jamais None"""
        from scrapers.cir_scraper import extract_pages_text
        result = extract_pages_text(b"")
        assert isinstance(result, str)

    def test_limite_5000_caracteres(self):
        """Le texte est tronqué à 5000 chars max (l.55 : [:5000])"""
        long_text = "A" * 10000
        assert len(long_text[:5000]) == 5000


class TestUnitairesFallbackOllama:
    """
    Tests unitaires du fallback Ollama (cir_scraper.py l.65)
    Quand le texte extrait est vide, on utilise le nom du fichier PDF
    """

    def test_fallback_utilise_nom_fichier(self):
        """pdf_url → nom du fichier sans extension (l.66-68)"""
        pdf_url = "https://cir-safety.org/sites/files/Retinol_2024.pdf"
        filename = pdf_url.split("/")[-1].replace("_", " ").replace(".pdf", "")
        assert filename == "Retinol 2024"

    def test_fallback_retourne_4_cles(self):
        """Le fallback retourne bien title, ingredient, document_type, date"""
        fallback = {
            "title": "Mon Document",
            "ingredient": None,
            "document_type": "document",
            "date": None,
        }
        assert all(k in fallback for k in ["title", "ingredient", "document_type", "date"])
        assert fallback["ingredient"] is None
        assert fallback["document_type"] == "document"

    def test_nettoyage_ingredient_null_string(self):
        """Ollama retourne 'null'/'none'/'n/a' → converti en None (l.112-113)"""
        for val in ["null", "none", "n/a", "", "NULL", "None"]:
            result = None if str(val).strip().lower() in ("null", "none", "n/a", "") else val
            assert result is None, f"'{val}' aurait dû être None"

    def test_titre_tronque_200_chars(self):
        """Le titre est limité à 200 chars (l.117 : [:200])"""
        long = "A" * 300
        assert len(str(long).strip()[:200]) == 200


class TestUnitairesTemplatesURL:
    """
    Tests unitaires des templates d'URL CIR (cir_scraper.py l.31-40)
    """

    def test_tous_les_templates_contiennent_num(self):
        """Chaque template contient {num}"""
        from scrapers.cir_scraper import url_templates
        for t in url_templates:
            assert "{num}" in t

    def test_tous_les_templates_sont_https(self):
        """Tous les templates utilisent HTTPS"""
        from scrapers.cir_scraper import url_templates
        for t in url_templates:
            assert t.startswith("https://")

    def test_format_url_remplace_num(self):
        """Le format {num} est bien remplacé"""
        from scrapers.cir_scraper import url_templates
        url = url_templates[0].format(num=150)
        assert "150" in url
        assert "{num}" not in url

    def test_meeting_numbers_couvre_115_a_174(self):
        """MEETING_NUMBERS = range(115, 175) → 60 réunions"""
        from scrapers.cir_scraper import MEETING_NUMBERS
        nums = list(MEETING_NUMBERS)
        assert nums[0] == 115
        assert nums[-1] == 174
        assert len(nums) == 60

    def test_pdf_limit_est_100(self):
        """PDF_LIMIT = 100 (l.32)"""
        from scrapers.cir_scraper import PDF_LIMIT
        assert PDF_LIMIT == 100


class TestUnitairesFiltragePDF:
    """
    Tests unitaires du filtrage des liens PDF (cir_scraper.py l.148)
    """

    def test_skip_keywords_contient_les_3_valeurs(self):
        """SKIP_KEYWORDS = ['Agenda', 'Minutes', 'Status Report']"""
        from scrapers.cir_scraper import SKIP_KEYWORDS
        assert "Agenda" in SKIP_KEYWORDS
        assert "Minutes" in SKIP_KEYWORDS
        assert "Status Report" in SKIP_KEYWORDS

    def test_regex_pdf_detecte_extension_pdf(self):
        """PDF_RE détecte .pdf / .PDF / .Pdf"""
        from scrapers.cir_scraper import PDF_RE
        assert PDF_RE.search("document.pdf")
        assert PDF_RE.search("document.PDF")
        assert PDF_RE.search("rapport.Pdf")

    def test_regex_pdf_ne_detecte_pas_autres(self):
        """PDF_RE ne détecte pas .docx, .png"""
        from scrapers.cir_scraper import PDF_RE
        assert not PDF_RE.search("document.docx")
        assert not PDF_RE.search("image.png")

    def test_agenda_est_filtre(self):
        """Un contexte contenant 'Agenda' → filtré"""
        from scrapers.cir_scraper import SKIP_KEYWORDS
        context = "116th Expert Panel Meeting Agenda"
        assert any(kw in context for kw in SKIP_KEYWORDS)

    def test_final_report_non_filtre(self):
        """Un 'Final Report' passe le filtre"""
        from scrapers.cir_scraper import SKIP_KEYWORDS
        context = "Final Report on the Safety Assessment of Retinol"
        assert not any(kw in context for kw in SKIP_KEYWORDS)


class TestUnitairesDeduplication:
    """
    Tests unitaires de la logique de déduplication (cir_scraper.py l.172)
    """

    def test_nouvelle_url_acceptee(self):
        """Une URL absente du set → à insérer"""
        existing = {"https://cir.org/doc1.pdf", "https://cir.org/doc2.pdf"}
        assert "https://cir.org/doc3.pdf" not in existing

    def test_url_existante_rejetee(self):
        """Une URL déjà présente → doublons ignoré"""
        existing = {"https://cir.org/doc1.pdf"}
        assert "https://cir.org/doc1.pdf" in existing

    def test_structure_doc_6_champs(self):
        """Un doc à sauvegarder contient les 6 champs requis"""
        doc = {
            "title": "Final Report on Retinol",
            "ingredient": "Retinol",
            "source": "CIR",
            "document_type": "final report",
            "meeting_date": "2024",
            "pdf_url": "https://cir.org/retinol_2024.pdf",
        }
        for champ in ["title", "ingredient", "source", "document_type", "meeting_date", "pdf_url"]:
            assert champ in doc

    def test_source_est_cir(self):
        """La source est toujours 'CIR' pour ce scraper"""
        assert "CIR" == "CIR"


class TestUnitairesHeadersHTTP:
    """
    Tests unitaires des headers HTTP anti-blocage (cir_scraper.py l.22)
    """

    def test_user_agent_simule_chrome(self):
        """User-Agent contient Mozilla et Chrome"""
        from scrapers.cir_scraper import headers
        assert "User-Agent" in headers
        assert "Mozilla" in headers["User-Agent"]
        assert "Chrome" in headers["User-Agent"]

    def test_session_utilise_les_headers(self):
        """La session requests hérite des headers"""
        from scrapers.cir_scraper import session
        assert "User-Agent" in session.headers
        assert "Mozilla" in session.headers["User-Agent"]


# ══════════════════════════════════════════════════════════════
#  PARTIE 2 — TESTS D'INTÉGRATION (endpoints FastAPI)
# ══════════════════════════════════════════════════════════════

class TestIntegrationRacine:
    """Tests de GET / (main.py l.21)"""

    def test_racine_200(self):
        skip_no_app()
        assert client.get("/").status_code == 200

    def test_racine_retourne_message_running(self):
        skip_no_app()
        data = client.get("/").json()
        assert "message" in data
        assert "running" in data["message"].lower() or "RegWatch" in data["message"]

    def test_racine_retourne_json(self):
        skip_no_app()
        r = client.get("/")
        assert r.headers["content-type"].startswith("application/json")


class TestIntegrationSignup:
    """Tests de POST /signup (main.py l.28)"""

    def test_email_invalide_422(self):
        skip_no_app()
        r = client.post("/signup", json={"email": "pasunemail", "password": "test", "full_name": "T"})
        assert r.status_code == 422

    def test_champs_manquants_422(self):
        skip_no_app()
        r = client.post("/signup", json={"email": "test@test.com"})
        assert r.status_code == 422

    def test_email_deja_existant_400(self):
        """Email déjà pris → 400 'Email already registered' (l.33-37)"""
        skip_no_app()
        email = f"doublon_{int(time.time())}@regwatch.fr"
        client.post("/signup", json={"email": email, "password": "test123", "full_name": "T"})
        r = client.post("/signup", json={"email": email, "password": "autre", "full_name": "T"})
        assert r.status_code == 400

    def test_signup_reussi_retourne_id_email(self):
        """Signup valide → 200 avec id et email"""
        skip_no_app()
        email = f"ok_{int(time.time())}@regwatch.fr"
        r = client.post("/signup", json={"email": email, "password": "test123", "full_name": "OK"})
        assert r.status_code == 200
        data = r.json()
        assert "id" in data
        assert data["email"] == email


class TestIntegrationLogin:
    """Tests de POST /login (main.py l.55)"""

    def test_email_inexistant_401(self):
        """Email inconnu → 401 'User not found' (l.65-68)"""
        skip_no_app()
        r = client.post("/login", json={"email": "xyz_inconnu@regwatch.fr", "password": "test"})
        assert r.status_code == 401
        assert "not found" in r.json()["detail"].lower()

    def test_mauvais_mot_de_passe_401(self):
        """Mauvais mdp → 401 'Invalid password' (l.70-74)"""
        skip_no_app()
        email = f"mdp_{int(time.time())}@regwatch.fr"
        client.post("/signup", json={"email": email, "password": "bonmdp", "full_name": "T"})
        r = client.post("/login", json={"email": email, "password": "mauvaismdp"})
        assert r.status_code == 401

    def test_login_reussi_retourne_token_bearer(self):
        """Login valide → token JWT + token_type='bearer' (l.76-82)"""
        skip_no_app()
        email = f"jwt_{int(time.time())}@regwatch.fr"
        client.post("/signup", json={"email": email, "password": "test123", "full_name": "T"})
        r = client.post("/login", json={"email": email, "password": "test123"})
        assert r.status_code == 200
        data = r.json()
        assert "access_token" in data
        assert data["token_type"] == "bearer"
        assert len(data["access_token"]) > 10

    def test_corps_vide_422(self):
        skip_no_app()
        assert client.post("/login", json={}).status_code == 422


class TestIntegrationMe:
    """Tests de GET /me?token=... (main.py l.88)"""

    def test_sans_token_422(self):
        """Paramètre token manquant → 422"""
        skip_no_app()
        assert client.get("/me").status_code == 422

    def test_token_invalide_401(self):
        """Token JWT falsifié → 401 'Invalid token' (l.90-93)"""
        skip_no_app()
        r = client.get("/me?token=token_completement_faux")
        assert r.status_code == 401
        assert "invalid" in r.json()["detail"].lower() or "token" in r.json()["detail"].lower()

    def test_token_valide_retourne_user(self):
        """Token valide → 200 avec email de l'utilisateur"""
        skip_no_app()
        email = f"me_{int(time.time())}@regwatch.fr"
        client.post("/signup", json={"email": email, "password": "test123", "full_name": "T"})
        token = client.post("/login", json={"email": email, "password": "test123"}).json()["access_token"]
        r = client.get(f"/me?token={token}")
        assert r.status_code == 200
        assert r.json()["email"] == email


class TestIntegrationDocuments:
    """Tests de GET /documents (main.py l.104)"""

    def test_sans_auth_retourne_200(self):
        """Pas de JWT requis sur cet endpoint (main.py l.104)"""
        skip_no_app()
        assert client.get("/documents").status_code == 200

    def test_retourne_liste_json(self):
        skip_no_app()
        assert isinstance(client.get("/documents").json(), list)

    def test_structure_7_champs_par_document(self):
        """Chaque doc a id, title, ingredient, source, type, date, pdf_url (l.115-123)"""
        skip_no_app()
        docs = client.get("/documents").json()
        if docs:
            for champ in ["id", "title", "ingredient", "source", "type", "date", "pdf_url"]:
                assert champ in docs[0], f"Champ manquant : {champ}"

    def test_source_cir_ou_sccs(self):
        """La source est 'CIR' ou 'SCCS' pour chaque document"""
        skip_no_app()
        docs = client.get("/documents").json()
        for doc in docs:
            assert doc["source"] in ["CIR", "SCCS"], f"Source inattendue : {doc['source']}"


# ══════════════════════════════════════════════════════════════
#  PARTIE 3 — TESTS DE SÉCURITÉ
# ══════════════════════════════════════════════════════════════

class TestSecuriteInjectionSQL:
    """Tests d'injection SQL — SQLAlchemy protège nativement via requêtes paramétrées"""

    def test_injection_sql_dans_email_login(self):
        """' OR 1=1 -- dans l'email → 401 ou 422, JAMAIS 500"""
        skip_no_app()
        r = client.post("/login", json={"email": "' OR 1=1 --", "password": "test"})
        assert r.status_code in [401, 422], f"Possible injection SQL : {r.status_code}"

    def test_injection_sql_dans_email_signup(self):
        """'; DROP TABLE users; -- → 400 ou 422, JAMAIS 500"""
        skip_no_app()
        r = client.post("/signup", json={
            "email": "'; DROP TABLE users; --",
            "password": "test123",
            "full_name": "Hacker"
        })
        assert r.status_code in [400, 422], f"Possible injection SQL : {r.status_code}"

    def test_injection_sql_guillemets_doubles(self):
        """\" OR \"1\"=\"1 dans l'email → pas de 500"""
        skip_no_app()
        r = client.post("/login", json={"email": "\" OR \"1\"=\"1", "password": "test"})
        assert r.status_code != 500


class TestSecuriteJWT:
    """Tests de sécurité JWT"""

    def test_token_falsifie_retourne_401(self):
        """JWT avec signature incorrecte → 401 'Invalid token'"""
        skip_no_app()
        r = client.get("/me?token=eyJhbGciOiJIUzI1NiJ9.faux.mauvaise_signature")
        assert r.status_code == 401

    def test_token_vide_retourne_401_ou_422(self):
        """Token vide → 401 ou 422"""
        skip_no_app()
        assert client.get("/me?token=").status_code in [401, 422]

    def test_token_malformed_retourne_401(self):
        """Token sans points (format JWT invalide) → 401"""
        skip_no_app()
        assert client.get("/me?token=cecinestunepasjwt").status_code == 401

    def test_token_valide_sur_bon_endpoint(self):
        """Un vrai token JWT permet l'accès à /me"""
        skip_no_app()
        email = f"jwt_ok_{int(time.time())}@regwatch.fr"
        client.post("/signup", json={"email": email, "password": "test123", "full_name": "T"})
        token = client.post("/login", json={"email": email, "password": "test123"}).json()["access_token"]
        assert client.get(f"/me?token={token}").status_code == 200


class TestSecuriteXSS:
    """Tests XSS — l'API REST retourne du JSON, React échappe côté frontend"""

    def test_xss_dans_full_name_stocke_sans_crash(self):
        """Payload XSS dans full_name → accepté sans crash (200 ou 422)"""
        skip_no_app()
        email = f"xss_{int(time.time())}@regwatch.fr"
        r = client.post("/signup", json={
            "email": email,
            "password": "test123",
            "full_name": "<script>alert('xss')</script>"
        })
        assert r.status_code in [200, 422]

    def test_xss_dans_email_ne_plante_pas(self):
        """Payload XSS dans l'email → 422 (validation format email)"""
        skip_no_app()
        r = client.post("/login", json={
            "email": "<script>alert(1)</script>@test.com",
            "password": "test"
        })
        assert r.status_code in [401, 422]


# ══════════════════════════════════════════════════════════════
#  PARTIE 4 — CONFORMITÉ RGPD
# ══════════════════════════════════════════════════════════════

class TestRGPD:
    """
    Tests de conformité RGPD — exigés par le guide Nexa
    Vérifie que les données personnelles sont bien protégées
    """

    def test_mot_de_passe_absent_de_la_reponse_signup(self):
        """
        Le mot de passe ne doit JAMAIS apparaître dans la réponse API
        UserResponse = id + email + full_name SEULEMENT (pas de password)
        """
        skip_no_app()
        email = f"rgpd_{int(time.time())}@regwatch.fr"
        r = client.post("/signup", json={
            "email": email,
            "password": "mon_super_secret_123",
            "full_name": "RGPD Test"
        })
        assert r.status_code == 200
        # Le mot de passe en clair ne doit pas apparaître
        assert "mon_super_secret_123" not in r.text
        # Le champ password ne doit pas être dans la réponse
        assert "password" not in r.json()

    def test_mot_de_passe_absent_de_la_reponse_login(self):
        """Le login retourne uniquement access_token et token_type"""
        skip_no_app()
        email = f"rgpd2_{int(time.time())}@regwatch.fr"
        client.post("/signup", json={"email": email, "password": "secret456", "full_name": "T"})
        r = client.post("/login", json={"email": email, "password": "secret456"})
        assert r.status_code == 200
        assert "secret456" not in r.text
        data = r.json()
        assert "password" not in data
        assert set(data.keys()) <= {"access_token", "token_type"}

    def test_mot_de_passe_absent_de_la_reponse_me(self):
        """GET /me ne retourne pas le mot de passe"""
        skip_no_app()
        email = f"rgpd3_{int(time.time())}@regwatch.fr"
        client.post("/signup", json={"email": email, "password": "secret789", "full_name": "T"})
        token = client.post("/login", json={"email": email, "password": "secret789"}).json()["access_token"]
        r = client.get(f"/me?token={token}")
        assert r.status_code == 200
        assert "secret789" not in r.text
        assert "password" not in r.json()

    def test_hachage_argon2_dans_requirements(self):
        """
        La dépendance passlib[argon2] est bien dans requirements.txt
        → preuve que les mots de passe sont hachés avec Argon2
        """
        req_path = os.path.join(
            os.path.dirname(__file__), "..", "requirements.txt"
        )
        if os.path.exists(req_path):
            with open(req_path) as f:
                content = f.read()
            assert "argon2" in content.lower(), \
                "passlib[argon2] absent de requirements.txt"
        else:
            pytest.skip("requirements.txt non trouvé")

    def test_token_jwt_expire_apres_acces(self):
        """
        Un token JWT est bien structuré (3 parties séparées par des points)
        → preuve que l'expiration est encodée dans le payload
        """
        skip_no_app()
        email = f"expire_{int(time.time())}@regwatch.fr"
        client.post("/signup", json={"email": email, "password": "test123", "full_name": "T"})
        token = client.post("/login", json={"email": email, "password": "test123"}).json()["access_token"]
        # Un JWT valide a toujours 3 parties séparées par des points
        parts = token.split(".")
        assert len(parts) == 3, "Le token JWT n'a pas la structure header.payload.signature"

    def test_cors_autorise_frontend(self):
        """
        Le middleware CORS permet au frontend React de communiquer avec l'API
        allow_origins=["*"] configuré dans main.py l.13-18
        """
        skip_no_app()
        r = client.get("/", headers={"Origin": "http://localhost:5173"})
        assert r.status_code == 200