"""
Document API tests — async only (Plan 05 cutover).

Legacy sync tests (using the flat-file storage layer) were deleted in Plan 05.
All tests here use async_client (httpx.AsyncClient + ASGITransport + in-memory SQLite).
"""
from __future__ import annotations

import re

import pytest


async def test_upload_txt_no_classify(async_client, sample_txt):
    with open(sample_txt, "rb") as f:
        resp = await async_client.post(
            "/api/documents/upload",
            files={"file": ("sample.txt", f, "text/plain")},
            data={"auto_classify": "false"},
        )
    assert resp.status_code == 200
    data = resp.json()
    assert data["original_name"] == "sample.txt"
    assert "extracted_text" in data
    assert "invoices" in data["extracted_text"].lower() or len(data["extracted_text"]) > 0
    assert data["topics"] == []
    assert "id" in data


async def test_upload_pdf_no_classify(async_client, sample_pdf):
    with open(sample_pdf, "rb") as f:
        resp = await async_client.post(
            "/api/documents/upload",
            files={"file": ("sample.pdf", f, "application/pdf")},
            data={"auto_classify": "false"},
        )
    assert resp.status_code == 200
    data = resp.json()
    assert data["mime_type"] == "application/pdf"
    assert len(data["extracted_text"]) > 0


async def test_list_documents(async_client, sample_txt):
    with open(sample_txt, "rb") as f:
        await async_client.post(
            "/api/documents/upload",
            files={"file": ("a.txt", f, "text/plain")},
            data={"auto_classify": "false"},
        )
    resp = await async_client.get("/api/documents")
    assert resp.status_code == 200
    data = resp.json()
    assert data["total"] == 1
    assert len(data["items"]) == 1


async def test_list_documents_filter_by_topic(async_client, db_session, sample_txt):
    with open(sample_txt, "rb") as f:
        upload = (
            await async_client.post(
                "/api/documents/upload",
                files={"file": ("a.txt", f, "text/plain")},
                data={"auto_classify": "false"},
            )
        ).json()

    # Wire a topic via the storage service directly (replaces old flat-file call)
    from services import storage

    await storage.update_document_topics(db_session, upload["id"], ["finance"])

    resp = await async_client.get("/api/documents?topic=finance")
    assert resp.json()["total"] == 1

    resp2 = await async_client.get("/api/documents?topic=legal")
    assert resp2.json()["total"] == 0


async def test_get_document(async_client, sample_txt):
    with open(sample_txt, "rb") as f:
        upload = (
            await async_client.post(
                "/api/documents/upload",
                files={"file": ("a.txt", f, "text/plain")},
                data={"auto_classify": "false"},
            )
        ).json()

    resp = await async_client.get(f"/api/documents/{upload['id']}")
    assert resp.status_code == 200
    assert resp.json()["id"] == upload["id"]


async def test_get_document_not_found(async_client):
    resp = await async_client.get("/api/documents/nonexistent")
    assert resp.status_code == 404


async def test_delete_document(async_client, sample_txt):
    with open(sample_txt, "rb") as f:
        upload = (
            await async_client.post(
                "/api/documents/upload",
                files={"file": ("a.txt", f, "text/plain")},
                data={"auto_classify": "false"},
            )
        ).json()

    resp = await async_client.delete(f"/api/documents/{upload['id']}")
    assert resp.status_code == 200
    assert resp.json()["success"] is True

    resp2 = await async_client.get(f"/api/documents/{upload['id']}")
    assert resp2.status_code == 404


async def test_delete_document_not_found(async_client):
    resp = await async_client.delete("/api/documents/nonexistent")
    assert resp.status_code == 404


async def test_upload_empty_file(async_client):
    resp = await async_client.post(
        "/api/documents/upload",
        files={"file": ("empty.txt", b"", "text/plain")},
        data={"auto_classify": "false"},
    )
    assert resp.status_code == 400


async def test_upload_persists_to_postgres_and_minio(async_client, sample_txt):
    """After a successful upload, document is persisted and queryable via GET (STORE-01, STORE-02)."""
    with open(sample_txt, "rb") as f:
        resp = await async_client.post(
            "/api/documents/upload",
            files={"file": ("sample.txt", f, "text/plain")},
            data={"auto_classify": "false"},
        )
    assert resp.status_code == 200
    data = resp.json()

    # Response must include a UUID-format id
    uuid_pattern = re.compile(
        r"^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$"
    )
    assert "id" in data, "Upload response missing 'id'"
    assert uuid_pattern.match(data["id"]), f"id '{data['id']}' is not a UUID"

    # Metadata round-trips via GET
    doc_id = data["id"]
    get_resp = await async_client.get(f"/api/documents/{doc_id}")
    assert get_resp.status_code == 200
    get_data = get_resp.json()
    assert get_data["original_name"] == "sample.txt"


# ---------------------------------------------------------------------------
# Wave 0 xfail stubs for Phase 3 document endpoint tests — Plans 03-02 / 03-03
# ---------------------------------------------------------------------------


@pytest.mark.xfail(strict=False, reason="implemented in plan 03-02")
async def test_upload_url_endpoint(async_client, auth_user, mock_minio_presigned):
    """POST /api/documents/upload-url returns {upload_url, document_id} and creates
    a Document row with status='pending'.

    D-05: two-step upload flow — step 1 creates the pending Document row and
    returns the presigned PUT URL (15-min TTL). Quota is NOT reserved here.
    """
    assert True  # scaffold


@pytest.mark.xfail(strict=False, reason="implemented in plan 03-02")
async def test_confirm_endpoint(async_client, auth_user, mock_minio_presigned, mock_minio_stat):
    """POST /api/documents/{id}/confirm calls stat_object once, updates Document.size_bytes
    from the stat return value, and sets Document.status='uploaded'.

    D-05: step 3 of the presigned upload flow. stat_object provides the authoritative
    file size (D-07). The atomic quota UPDATE runs here (STORE-03).
    """
    assert True  # scaffold


@pytest.mark.xfail(strict=False, reason="implemented in plan 03-02")
async def test_get_quota(async_client, auth_user):
    """GET /api/auth/me/quota returns {used_bytes: 0, limit_bytes: 104857600}.

    STORE-04: quota usage bar endpoint. Returns current usage and limit for the
    authenticated user. Newly created users start at used_bytes=0.
    """
    assert True  # scaffold


@pytest.mark.xfail(strict=False, reason="implemented in plan 03-03")
async def test_cross_user_access_404(async_client, auth_user, db_session):
    """User B's request for GET /api/documents/{A_doc_id} returns 404.

    SEC-04: cross-user access returns 404 (not 403) to avoid information leakage
    (CONTEXT.md D-16). An attacker cannot distinguish between 'document does not
    exist' and 'document belongs to someone else'.
    """
    assert True  # scaffold


@pytest.mark.xfail(strict=False, reason="implemented in plan 03-03")
async def test_admin_cannot_access_documents(async_client, admin_user):
    """GET /api/documents using admin_user.headers returns 403.

    SEC-04 SC4: admin accounts cannot access document content (CLAUDE.md +
    CONTEXT.md D-16). The get_regular_user dependency enforces this for all
    /api/documents/* handlers.
    """
    assert True  # scaffold


@pytest.mark.xfail(strict=False, reason="implemented in plan 03-02")
async def test_documents_require_auth(async_client):
    """Anonymous GET /api/documents (no Authorization header) returns 401 or 403.

    D-16: all /api/documents/* endpoints require authentication via
    get_current_user (Phase 2 D-07 fulfilled in Phase 3).
    """
    assert True  # scaffold