from fastapi.testclient import TestClient
import pytest
from sqlalchemy import select

from central.app.blocked_products import upsert_blocker
from central.app.blocker_resolution import resolve_blocker_with_context, validate_resolution_input
from central.app.main import create_app
from central.app.models import AdminUser, Agent, AuditEvent, BlockedProduct, FiscalContextEntry, Job, Installation, Tenant
from central.tests.test_control_plane import seed, setup_db


def _seed_blocker(session_factory):
    agent_id, admin_id = seed(session_factory)
    with session_factory() as session:
        installation = session.scalar(select(Installation).where(Installation.agent_id == agent_id))
        installation.company_code = "ACME-COMPANY"
        blocker = upsert_blocker(
            session,
            installation.tenant_id,
            {
                "company": "Acme",
                "product_code": "P-001",
                "description": "Produto de teste",
                "blocker_type": "BLOCKED_MISSING_EVIDENCE",
                "field": "CFOP",
                "reason_code": "MISSING_CONTEXT",
                "input_fingerprint": "input-1",
                "evidence_summary": {"source": "test"},
            },
            installation_id=installation.id,
        )
        return blocker.id, admin_id, installation.id


def test_validate_resolution_input_accepts_known_enum_values():
    for key, value in (("entry_scope", "INTER"), ("product_role", "RESALE")):
        normalized, error = validate_resolution_input(
            {"scope": "PRODUCT", "scope_key": "P-001", "key": key, "value": value, "reason": "operator note"}
        )
        assert error is None
        assert normalized == {
            "scope": "PRODUCT",
            "scope_key": "P-001",
            "key": key,
            "value": value,
            "reason": "operator note",
        }


def test_validate_resolution_input_rejects_unsafe_or_incomplete_values():
    invalid_payloads = (
        {"scope": "PRODUCT", "scope_key": "P-001", "key": "entry_scope", "value": "ARBITRARY", "reason": "note"},
        {"scope": "PRODUCT", "scope_key": "P-001", "key": "not-a-key", "value": "x", "reason": "note"},
        {"scope": "NCM", "scope_key": "22030000", "key": "entry_scope", "value": "INTER", "reason": "note"},
        {"scope": "PRODUCT", "scope_key": "P-001", "key": "product_role", "value": "RESALE", "reason": ""},
        {"scope": "PRODUCT", "key": "product_role", "value": "RESALE", "reason": "note"},
        {"scope": "PRODUCT", "scope_key": "P-001", "key": "product_role", "value": "RESALE", "reason": "note", "context": "free text"},
    )

    for payload in invalid_payloads:
        normalized, error = validate_resolution_input(payload)
        assert normalized is None
        assert error


def test_resolve_blocker_with_context_persists_one_context_row_job_and_sanitized_audit():
    session_factory = setup_db()
    blocker_id, admin_id, installation_id = _seed_blocker(session_factory)

    with session_factory() as session:
        admin = session.get(AdminUser, admin_id)
        result = resolve_blocker_with_context(
            session,
            blocker_id,
            admin,
            {
                "scope": "PRODUCT",
                "scope_key": "P-001",
                "key": "product_role",
                "value": "RESALE",
                "reason": "reviewed token=secret-value",
            },
            request_ip="192.0.2.10",
        )

        entry = session.scalar(select(FiscalContextEntry).where(FiscalContextEntry.key == "product_role"))
        job = session.get(Job, result["job_id"])
        audit = session.get(AuditEvent, result["audit_id"])

        assert result["blocker_id"] == blocker_id
        assert entry.company_key == "ACME-COMPANY"
        assert entry.scope == "PRODUCT"
        assert entry.scope_key == "P-001"
        assert entry.value == "RESALE"
        assert entry.source == "OPERATOR"
        assert job.agent_id == session.get(Installation, installation_id).agent_id
        assert job.kind == "REPROCESS_PRODUCTS"
        assert job.payload == {"codigos": ["P-001"]}
        assert audit.action == "RESOLVE_BLOCKER_WITH_CONTEXT"
        assert audit.target_type == "blocker"
        assert audit.target_id == str(blocker_id)
        assert audit.context["reprocess_job_id"] == job.id
        assert audit.context["before"] is None
        assert audit.context["after"]["value"] == "RESALE"
        assert audit.context["request_ip"] == "192.0.2.10"
        assert "secret-value" not in str(audit.context)
        assert session.query(FiscalContextEntry).count() == 1


def test_legacy_blocker_without_installation_fails_closed_without_job_or_audit():
    session_factory = setup_db()
    blocker_id, admin_id, _ = _seed_blocker(session_factory)

    with session_factory() as session:
        blocker = session.get(BlockedProduct, blocker_id)
        blocker.installation_id = None
        session.commit()
        admin = session.get(AdminUser, admin_id)

        with pytest.raises(LookupError, match="installation"):
            resolve_blocker_with_context(session, blocker_id, admin, {"scope": "PRODUCT", "scope_key": "P-001", "key": "product_role", "value": "RESALE", "reason": "reviewed"})

        assert session.query(FiscalContextEntry).count() == 0
        assert session.query(Job).count() == 0
        assert session.query(AuditEvent).count() == 0


def test_cross_tenant_installation_pointer_fails_before_mutation():
    session_factory = setup_db()
    blocker_id, admin_id, _ = _seed_blocker(session_factory)

    with session_factory() as session:
        blocker = session.get(BlockedProduct, blocker_id)
        other_tenant = Tenant(name="Other Client")
        session.add(other_tenant)
        session.flush()
        other_agent = Agent(tenant_id=other_tenant.id, name="other-agent", token_hash="other-agent-token".ljust(64, "x"))
        session.add(other_agent)
        session.flush()
        other_installation = Installation(agent_id=other_agent.id, tenant_id=other_tenant.id, installation_id="22222222-2222-4222-8222-222222222222", company_code="OTHER-COMPANY")
        session.add(other_installation)
        session.flush()
        blocker.installation_id = other_installation.id
        session.commit()
        admin = session.get(AdminUser, admin_id)

        with pytest.raises(LookupError, match="tenant"):
            resolve_blocker_with_context(session, blocker_id, admin, {"scope": "PRODUCT", "scope_key": "P-001", "key": "product_role", "value": "RESALE", "reason": "reviewed"})

        assert session.query(FiscalContextEntry).count() == 0
        assert session.query(Job).count() == 0
        assert session.query(AuditEvent).count() == 0


def test_resolution_input_rejects_oversized_and_non_string_fields_cleanly():
    base = {"scope": "PRODUCT", "scope_key": "P-001", "key": "service_cfop", "value": "5102", "reason": "reviewed"}
    for field, value in (("value", "v" * 513), ("reason", "r" * 2001), ("reason", 123)):
        payload = {**base, field: value}
        normalized, error = validate_resolution_input(payload)
        assert normalized is None
        assert error


def test_boundary_length_audit_keeps_required_fields_instead_of_truncating_context():
    session_factory = setup_db()
    blocker_id, admin_id, _ = _seed_blocker(session_factory)

    with session_factory() as session:
        admin = session.get(AdminUser, admin_id)
        result = resolve_blocker_with_context(
            session,
            blocker_id,
            admin,
            {"scope": "PRODUCT", "scope_key": "P-001", "key": "service_cfop", "value": "v" * 512, "reason": "r" * 2000},
        )
        audit = session.get(AuditEvent, result["audit_id"])
        required = {"admin_user_id", "tenant_id", "client", "company_key", "installation_id", "product_code", "blocker_id", "key", "scope", "scope_key", "value", "reason", "before", "after", "reprocess_job_id", "request_ip"}
        assert required <= audit.context.keys()
        assert "truncated" not in audit.context


def test_human_resolution_detail_requires_auth_csrf_and_renders_safe_form():
    session_factory = setup_db()
    blocker_id, _, _ = _seed_blocker(session_factory)
    client = TestClient(create_app(database_probe=lambda: True, session_factory=session_factory, bootstrap_token=None))

    assert client.get(f"/blockers/{blocker_id}", follow_redirects=False).status_code == 303
    client.post("/login", data={"username": "operator", "password": "a-secure-password"}, follow_redirects=False)
    detail = client.get(f"/blockers/{blocker_id}")
    assert detail.status_code == 200
    assert "Salvar contexto e reprocessar" in detail.text
    assert "Cliente" in detail.text and "Servidor" in detail.text and "Produto" in detail.text
    assert "Evidência" in detail.text and "Valores aceitos" in detail.text
    assert "data-confirm" not in detail.text
    assert 'name="context"' not in detail.text

    missing_csrf = client.post(
        f"/blockers/{blocker_id}/resolve-context",
        data={"scope": "PRODUCT", "scope_key": "P-001", "key": "product_role", "value": "RESALE", "reason": "reviewed"},
    )
    assert missing_csrf.status_code == 403

    success = client.post(
        f"/blockers/{blocker_id}/resolve-context",
        data={"csrf_token": client.cookies.get("gti_csrf"), "scope": "PRODUCT", "scope_key": "P-001", "key": "product_role", "value": "RESALE", "reason": "reviewed"},
        follow_redirects=False,
    )
    assert success.status_code == 303
    assert success.headers["location"] == f"/blockers/{blocker_id}"


def test_human_and_json_resolution_routes_use_the_same_validated_workflow():
    session_factory = setup_db()
    blocker_id, _, _ = _seed_blocker(session_factory)
    client = TestClient(create_app(database_probe=lambda: True, session_factory=session_factory, bootstrap_token=None))
    client.post("/login", data={"username": "operator", "password": "a-secure-password"}, follow_redirects=False)
    csrf = client.cookies.get("gti_csrf")

    invalid = client.post(
        f"/v1/blockers/{blocker_id}/resolve-human",
        json={"csrf_token": csrf, "scope": "PRODUCT", "scope_key": "P-001", "key": "product_role", "value": "free text", "reason": "reviewed"},
    )
    assert invalid.status_code == 422

    api_result = client.post(
        f"/v1/blockers/{blocker_id}/resolve-human",
        json={"csrf_token": csrf, "scope": "PRODUCT", "scope_key": "P-001", "key": "entry_scope", "value": "INTER", "reason": "reviewed"},
    )
    assert api_result.status_code == 200
    assert set(api_result.json()) == {"blocker_id", "job_id", "audit_id"}

    unauthenticated = TestClient(create_app(database_probe=lambda: True, session_factory=session_factory, bootstrap_token=None)).post(
        f"/v1/blockers/{blocker_id}/resolve-human",
        json={"scope": "PRODUCT", "scope_key": "P-001", "key": "entry_scope", "value": "INTER", "reason": "reviewed"},
    )
    assert unauthenticated.status_code == 401