"""Step 4 tests: Langflow import pipeline (Langflow faked, LFX real)."""

import json
from pathlib import Path
from uuid import UUID, uuid4

from app.flows.sync import lfx_id_for

FIXTURES = Path(__file__).parent / "fixtures" / "flows"
LANGFLOW_ID = "11111111-2222-4333-8444-555555555555"


def _export_doc(name="importiert"):
    fixture = json.loads((FIXTURES / "simple_rule.json").read_text())
    return {
        "id": LANGFLOW_ID,
        "name": name,
        "description": "aus Langflow",
        "endpoint_name": None,
        "data": fixture["data"],
        "tags": [],
        "webhook": False,
        "is_component": False,
    }


async def test_import_creates_definition_version_and_deploys(client, lfx_server, override_langflow):
    override_langflow(_export_doc())
    response = await client.post(
        "/api/flows/import",
        json={"langflow_flow_id": LANGFLOW_ID, "author": "admin"},
    )
    assert response.status_code == 201, response.text
    body = response.json()
    assert body["definition"]["name"] == "importiert"
    assert body["version"]["version_no"] == 1
    assert body["version"]["author"] == "admin"
    assert body["version"]["lfx_flow_id"] == lfx_id_for(UUID(body["definition"]["id"]), 1)
    assert body["version"]["deployed_at"] is not None
    assert body["version"]["langflow_json"]["data"]["nodes"]

    # Imported flow actually runs on LFX.
    definition_id = body["definition"]["id"]
    response = await client.post(f"/api/flows/{definition_id}/run", json={"input": {"betrag": 10}})
    assert response.status_code == 200, response.text
    assert response.json()["status"] == "completed"


async def test_import_same_content_is_idempotent(client, lfx_server, override_langflow):
    override_langflow(_export_doc())
    first = await client.post("/api/flows/import", json={"langflow_flow_id": LANGFLOW_ID})
    second = await client.post("/api/flows/import", json={"langflow_flow_id": LANGFLOW_ID})
    assert first.status_code == 201
    assert second.status_code == 201
    assert first.json()["definition"]["id"] == second.json()["definition"]["id"]
    # Unchanged content creates no new version.
    assert second.json()["version"]["version_no"] == 1


async def test_import_changed_content_bumps_version(client, lfx_server, override_langflow):
    override_langflow(_export_doc())
    first = await client.post("/api/flows/import", json={"langflow_flow_id": LANGFLOW_ID})
    assert first.status_code == 201
    changed = _export_doc()
    changed["description"] = "neue Beschreibung"
    override_langflow(changed)
    second = await client.post("/api/flows/import", json={"langflow_flow_id": LANGFLOW_ID})
    assert second.status_code == 201
    assert second.json()["version"]["version_no"] == 2


async def test_import_writes_canonical_file(
    client, lfx_server, override_langflow, tmp_path, monkeypatch
):
    from app.settings import settings

    monkeypatch.setattr(settings, "flows_dir", str(tmp_path))
    override_langflow(_export_doc())
    response = await client.post("/api/flows/import", json={"langflow_flow_id": LANGFLOW_ID})
    assert response.status_code == 201, response.text
    written = tmp_path / "importiert.json"
    assert written.is_file()
    assert json.loads(written.read_text())["name"] == "importiert"


async def test_import_with_explicit_name(client, lfx_server, override_langflow):
    override_langflow(_export_doc(name="langflow-name"))
    response = await client.post(
        "/api/flows/import",
        json={"langflow_flow_id": LANGFLOW_ID, "name": "wunschname"},
    )
    assert response.status_code == 201, response.text
    assert response.json()["definition"]["name"] == "wunschname"


async def test_import_without_deploy(client, override_langflow):
    override_langflow(_export_doc())
    response = await client.post(
        "/api/flows/import",
        json={"langflow_flow_id": LANGFLOW_ID, "deploy": False},
    )
    assert response.status_code == 201, response.text
    body = response.json()
    assert body["version"]["lfx_flow_id"] is None
    assert body["version"]["deployed_at"] is None


async def test_import_langflow_not_found(client, override_langflow):
    override_langflow(status=404)
    response = await client.post("/api/flows/import", json={"langflow_flow_id": LANGFLOW_ID})
    assert response.status_code == 404


async def test_import_langflow_unreachable(client, override_langflow):
    override_langflow(status=0)
    response = await client.post("/api/flows/import", json={"langflow_flow_id": str(uuid4())})
    assert response.status_code == 503


async def test_list_langflow_flows(client, override_langflow):
    override_langflow(_export_doc())
    response = await client.get("/api/flows/langflow/available")
    assert response.status_code == 200
    assert response.json() == [{"id": "fake-1", "name": "fake"}]