"""Le backend doit accepter le format v4 : cotes de branche et relations."""

from __future__ import annotations

from fastapi.testclient import TestClient

from tests.conftest import build_map


def build_v4_map() -> dict:
    payload = build_map(node_count=1, name="Infrastructure")
    payload["version"] = 4
    payload["nodes"] = [
        {
            "id": "root",
            "type": "root",
            "text": "Infrastructure",
            "position": {"x": 0, "y": 0},
            "parentId": None,
            "order": 0,
        },
        {
            "id": "reseau",
            "type": "standard",
            "text": "Reseau",
            "position": {"x": 240, "y": 0},
            "parentId": "root",
            "order": 0,
            "side": "right",
        },
        {
            "id": "firewall",
            "type": "standard",
            "text": "Firewall",
            "position": {"x": 460, "y": 0},
            "parentId": "reseau",
            "order": 0,
        },
        {
            "id": "services",
            "type": "standard",
            "text": "Services",
            "position": {"x": -240, "y": 0},
            "parentId": "root",
            "order": 1,
            "side": "left",
        },
        {
            "id": "web",
            "type": "standard",
            "text": "Web",
            "position": {"x": -460, "y": 0},
            "parentId": "services",
            "order": 0,
        },
    ]
    payload["edges"] = [
        {"id": "e-root-reseau", "source": "root", "target": "reseau"},
        {"id": "e-reseau-firewall", "source": "reseau", "target": "firewall"},
        {"id": "e-root-services", "source": "root", "target": "services"},
        {"id": "e-services-web", "source": "services", "target": "web"},
    ]
    payload["relations"] = [
        {
            "id": "r-1",
            "sourceId": "firewall",
            "targetId": "web",
            "label": "protege",
            "style": "bezier",
            "color": "#a855f7",
            "width": 2,
            "dashed": True,
            "markerEnd": "arrow",
        }
    ]
    payload["settings"]["layout"] = "mindmap-both"
    return payload


def test_share_accepts_v4_map(client: TestClient) -> None:
    response = client.post("/api/shares", json={"title": "v4", "map": build_v4_map()})
    assert response.status_code == 201, response.text


def test_sides_and_relations_are_returned_unchanged(client: TestClient) -> None:
    created = client.post("/api/shares", json={"title": "v4", "map": build_v4_map()})
    token = created.json()["share_token"]

    public = client.get("/api/shares/" + token).json()
    assert public["map_version"] == 4
    assert public["map"]["settings"]["layout"] == "mindmap-both"

    sides = {node["id"]: node.get("side") for node in public["map"]["nodes"]}
    assert sides["reseau"] == "right"
    assert sides["services"] == "left"
    # Le cote n'est porte que par les branches de niveau 1.
    assert sides["firewall"] is None

    relations = public["map"]["relations"]
    assert len(relations) == 1
    assert relations[0]["sourceId"] == "firewall"
    assert relations[0]["targetId"] == "web"
    assert relations[0]["label"] == "protege"
    assert relations[0]["dashed"] is True


def test_relation_does_not_alter_hierarchy(client: TestClient) -> None:
    """Une relation ne doit jamais devenir un lien parent / enfant."""
    created = client.post("/api/shares", json={"title": "v4", "map": build_v4_map()})
    public = client.get("/api/shares/" + created.json()["share_token"]).json()

    parents = {node["id"]: node.get("parentId") for node in public["map"]["nodes"]}
    assert parents["firewall"] == "reseau"
    assert parents["web"] == "services"

    edge_pairs = {(edge["source"], edge["target"]) for edge in public["map"]["edges"]}
    assert ("firewall", "web") not in edge_pairs


def test_self_relation_is_rejected(client: TestClient) -> None:
    payload = build_v4_map()
    payload["relations"][0]["targetId"] = payload["relations"][0]["sourceId"]

    response = client.post("/api/shares", json={"title": "x", "map": payload})
    assert response.status_code == 422


def test_relation_without_endpoints_is_rejected(client: TestClient) -> None:
    payload = build_v4_map()
    del payload["relations"][0]["targetId"]

    response = client.post("/api/shares", json={"title": "x", "map": payload})
    assert response.status_code == 422


def test_map_without_relations_is_still_accepted(client: TestClient) -> None:
    payload = build_v4_map()
    del payload["relations"]

    response = client.post("/api/shares", json={"title": "x", "map": payload})
    assert response.status_code == 201, response.text


def test_older_versions_are_still_accepted(client: TestClient) -> None:
    for version in (1, 2, 3):
        payload = build_map()
        payload["version"] = version
        response = client.post("/api/shares", json={"title": f"v{version}", "map": payload})
        assert response.status_code == 201, response.text