"""Tests for upload-time redaction strategy wiring."""

from __future__ import annotations

import io
import json

import pytest
from httpx import AsyncClient
from sqlalchemy.ext.asyncio import AsyncSession

from app.db.models import Document, IngestStatus
from app.services.document_sanitiser import RedactionStrategy
from app.services.redaction_upload import (
    InvalidRedactionStrategyError,
    build_upload_db_context,
    deserialize_db_context,
    parse_redaction_strategy,
    serialize_db_context,
)


def test_parse_redaction_strategy_defaults_and_aliases() -> None:
    assert parse_redaction_strategy(None) is RedactionStrategy.AI_HYBRID
    assert parse_redaction_strategy("") is RedactionStrategy.AI_HYBRID
    assert parse_redaction_strategy("AI_HYBRID") is RedactionStrategy.AI_HYBRID
    assert parse_redaction_strategy("deterministic") is RedactionStrategy.DETERMINISTIC_CODE
    assert parse_redaction_strategy("DETERMINISTIC_CODE") is RedactionStrategy.DETERMINISTIC_CODE


def test_parse_redaction_strategy_rejects_unknown() -> None:
    with pytest.raises(InvalidRedactionStrategyError):
        parse_redaction_strategy("magic_redact")


def test_serialize_deserialize_db_context_roundtrip() -> None:
    ctx = {"client_name": "Jane Doe", "property_address": "10 High Street"}
    raw = serialize_db_context(ctx)
    assert raw is not None
    assert deserialize_db_context(raw) == ctx


@pytest.mark.asyncio
async def test_build_upload_db_context_prefers_form_over_tenant_backfill(
    test_db: AsyncSession,
) -> None:
    ctx = await build_upload_db_context(
        test_db,
        "tenant_test",
        client_name="Explicit Client",
        property_address="99 Form Street",
        surveyor_name="Form Surveyor",
    )
    assert ctx["client_name"] == "Explicit Client"
    assert ctx["property_address"] == "99 Form Street"
    assert ctx["surveyor_name"] == "Form Surveyor"


def _minimal_docx_bytes() -> bytes:
    from docx import Document

    buf = io.BytesIO()
    doc = Document()
    doc.add_paragraph("Upload redaction strategy fixture.")
    doc.save(buf)
    return buf.getvalue()


@pytest.fixture
def noop_ingest(monkeypatch: pytest.MonkeyPatch) -> None:
    async def _noop(doc_id: str, file_path) -> None:  # noqa: ANN001, ARG001
        return None

    monkeypatch.setattr("app.ingest.pipeline.ingest_document", _noop)


@pytest.mark.asyncio
async def test_upload_accepts_deterministic_strategy(
    async_client: AsyncClient,
    test_db: AsyncSession,
    noop_ingest: None,
) -> None:
    files = [
        (
            "file",
            (
                "report.docx",
                _minimal_docx_bytes(),
                "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
            ),
        )
    ]
    data = {
        "redaction_strategy": "deterministic",
        "client_name": "Jane Client",
        "property_address": "1 Test Lane",
    }
    res = await async_client.post("/upload", files=files, data=data)
    assert res.status_code == 202
    body = res.json()
    assert body["redaction_strategy"] == "deterministic"

    doc = await test_db.get(Document, body["document_id"])
    assert doc is not None
    assert doc.redaction_strategy == "deterministic"
    assert json.loads(doc.redaction_context_json or "{}")["client_name"] == "Jane Client"


@pytest.mark.asyncio
async def test_upload_rejects_invalid_redaction_strategy(
    async_client: AsyncClient,
    test_db: AsyncSession,
    noop_ingest: None,
) -> None:
    files = [
        (
            "file",
            (
                "report.docx",
                _minimal_docx_bytes(),
                "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
            ),
        )
    ]
    res = await async_client.post(
        "/upload",
        files=files,
        data={"redaction_strategy": "not_a_real_strategy"},
    )
    assert res.status_code == 400
    assert "Invalid redaction_strategy" in res.json()["detail"]


def test_ingest_sanitisation_gate_for_deterministic_strategy() -> None:
    """Explicit deterministic uploads must always enter the sanitiser path."""
    from app.db.models import DocumentPurpose
    from app.services.document_sanitiser import RedactionStrategy

    strategy = RedactionStrategy.DETERMINISTIC_CODE
    doc_purpose = DocumentPurpose.report_source
    needs_sanitise = (
        doc_purpose == DocumentPurpose.style_corpus
        or strategy is RedactionStrategy.DETERMINISTIC_CODE
    )
    assert needs_sanitise is True