"""
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"