"""AP2.2b — A2 linear project End-to-End (Neue Küche Happy Path)."""

from __future__ import annotations

from tests.factories import provision_user_in_tenant
from tests.test_initiatives_actions import _auth, _create_initiative, _login

_STARTER_ACTION = "Erster Schritt — Planung konkretisieren"
_GATE_TITLES = (
    "G1 — Planung",
    "G2 — Vorbereitung",
    "G3 — Umsetzung",
    "G4 — Abschluss",
)


def _gate_by_title(items: list[dict], prefix: str) -> dict:
    return next(i for i in items if i.get("title", "").startswith(prefix))


def _create_kitchen(client, token):
    created = _create_initiative(
        client,
        token,
        title="Neue Küche",
        archetype_key="initiative.linear_project",
    )
    assert created.status_code == 201
    body = created.json()
    assert body["starter_kit"]["applied"] is True
    assert body["archetype_key"] == "initiative.linear_project"
    return body["id"]


def test_a2_starter_kit_kitchen_structure(client):
    """Starter-Kit: Gates in Kette, Projects, Guidance, Operating Context."""
    user = provision_user_in_tenant(tenant_role="admin")
    token = _login(client, user)
    initiative_id = _create_kitchen(client, token)

    ctx = client.get(
        f"/api/initiatives/{initiative_id}/operating-context",
        headers=_auth(token),
    )
    assert ctx.status_code == 200
    body = ctx.json()
    assert body["method_key"] == "sequential_dependency"
    assert "critical_path" in body["steering_elements"]
    assert "gate_fulfillment" in body["steering_elements"]
    assert body["ui_profile"]["planDefaultRoute"] == "/plan/gates"
    assert body["ui_profile"]["controlDefaultRoute"] == "/control/status"

    roadmap = client.get(
        f"/api/initiatives/{initiative_id}/roadmap/items",
        headers=_auth(token),
    )
    assert roadmap.status_code == 200
    items = roadmap.json()
    assert len(items) == 4
    assert {i["title"] for i in items} == set(_GATE_TITLES)
    assert sum(1 for i in items if i["status"] == "active") == 1
    assert _gate_by_title(items, "G1")["status"] == "active"

    deps = client.get(
        f"/api/initiatives/{initiative_id}/roadmap/dependencies",
        headers=_auth(token),
    )
    assert deps.status_code == 200
    gate_ids = {i["title"]: i["id"] for i in items}
    dep_pairs = {(d["from_item_id"], d["to_item_id"]) for d in deps.json()}
    assert (gate_ids["G2 — Vorbereitung"], gate_ids["G1 — Planung"]) in dep_pairs
    assert (gate_ids["G3 — Umsetzung"], gate_ids["G2 — Vorbereitung"]) in dep_pairs
    assert (gate_ids["G4 — Abschluss"], gate_ids["G3 — Umsetzung"]) in dep_pairs

    projects = client.get(
        f"/api/initiatives/{initiative_id}/projects",
        headers=_auth(token),
    )
    assert projects.status_code == 200
    assert {"Hauptpfad", "Begleitung"} <= {p["title"] for p in projects.json()}

    actions = client.get(
        f"/api/initiatives/{initiative_id}/actions",
        headers=_auth(token),
    )
    assert actions.status_code == 200
    assert any(a["title"] == _STARTER_ACTION for a in actions.json())

    snap = client.get(
        f"/api/initiatives/{initiative_id}/steering-snapshot",
        headers=_auth(token),
    )
    assert snap.status_code == 200
    snap_body = snap.json()
    assert snap_body["steering_guidance"]
    assert snap_body["steering_kernel"]["primary_method_key"] == "sequential_dependency"
    assert snap_body["steering_kernel"]["horizon"]["kind"] == "gate"
    next_actions = snap_body.get("next_actions") or []
    assert next_actions
    starter = next(a for a in actions.json() if a["title"] == _STARTER_ACTION)
    assert next_actions[0]["action_id"] == starter["id"]
    assert next_actions[0]["reason_code"] in (
        "execution_ready",
        "execution_critical_path",
    )


def test_a2_kitchen_critical_path_complete_advances_next(client):
    """Montage-Kette am aktiven Gate: kritischer Pfad, Next mit Begründung, Fortschritt."""
    user = provision_user_in_tenant(tenant_role="admin")
    token = _login(client, user)
    initiative_id = _create_kitchen(client, token)

    actions = client.get(
        f"/api/initiatives/{initiative_id}/actions",
        headers=_auth(token),
    )
    starter = next(a for a in actions.json() if a["title"] == _STARTER_ACTION)
    deleted = client.delete(
        f"/api/actions/{starter['id']}",
        headers=_auth(token),
    )
    assert deleted.status_code == 204

    roadmap = client.get(
        f"/api/initiatives/{initiative_id}/roadmap/items",
        headers=_auth(token),
    )
    g1_id = _gate_by_title(roadmap.json(), "G1")["id"]

    titles = ["Geräte geliefert", "Einbau Montage", "Endabnahme Küche"]
    action_ids: list[str] = []
    for index, title in enumerate(titles):
        res = client.post(
            f"/api/initiatives/{initiative_id}/actions",
            json={
                "title": title,
                "status": "open",
                "roadmap_item_id": g1_id,
                "sort_order": index,
            },
            headers=_auth(token),
        )
        assert res.status_code == 201
        action_ids.append(res.json()["id"])

    for pred, succ in zip(action_ids[:-1], action_ids[1:]):
        dep = client.post(
            f"/api/initiatives/{initiative_id}/execution/dependencies",
            json={
                "predecessor_action_id": pred,
                "successor_action_id": succ,
                "dependency_kind": "requires",
            },
            headers=_auth(token),
        )
        assert dep.status_code == 201

    graph = client.get(
        f"/api/initiatives/{initiative_id}/execution/graph-state",
        headers=_auth(token),
    )
    assert graph.status_code == 200
    graph_body = graph.json()
    assert graph_body["critical_path"] == action_ids
    assert action_ids[0] in graph_body["ready_actions"]
    assert action_ids[1] in graph_body["blocked_actions"]

    snap = client.get(
        f"/api/initiatives/{initiative_id}/steering-snapshot",
        headers=_auth(token),
    )
    assert snap.status_code == 200
    snap_body = snap.json()
    kernel = snap_body["steering_kernel"]
    exec_graph = kernel["read_models"].get("execution_graph") or {}
    assert exec_graph.get("critical_path") == action_ids

    next_actions = snap_body.get("next_actions") or []
    assert next_actions
    top = next_actions[0]
    assert top["action_id"] == action_ids[0]
    assert top["reason_code"] in ("execution_ready", "execution_critical_path")

    done = client.patch(
        f"/api/actions/{action_ids[0]}",
        json={"status": "done"},
        headers=_auth(token),
    )
    assert done.status_code == 200

    snap_after = client.get(
        f"/api/initiatives/{initiative_id}/steering-snapshot",
        headers=_auth(token),
    )
    assert snap_after.status_code == 200
    next_after = snap_after.json().get("next_actions") or []
    assert next_after
    assert next_after[0]["action_id"] == action_ids[1]
    assert next_after[0]["reason_code"] in (
        "execution_ready",
        "execution_critical_path",
    )


def test_a2_kitchen_planning_debt_surfaces_gate_proposals(client):
    """Aktives Gate ohne Actions → Planning Debt + gate_next_actions Proposal."""
    user = provision_user_in_tenant(tenant_role="admin")
    token = _login(client, user)
    initiative_id = _create_kitchen(client, token)

    actions = client.get(
        f"/api/initiatives/{initiative_id}/actions",
        headers=_auth(token),
    )
    starter = next(a for a in actions.json() if a["title"] == _STARTER_ACTION)
    deleted = client.delete(
        f"/api/actions/{starter['id']}",
        headers=_auth(token),
    )
    assert deleted.status_code == 204

    snap = client.get(
        f"/api/initiatives/{initiative_id}/steering-snapshot",
        headers=_auth(token),
    )
    assert snap.status_code == 200
    snap_body = snap.json()
    planning_debt = snap_body["steering_kernel"]["read_models"].get("planning_debt") or []
    assert planning_debt
    assert any(d.get("kind") == "missing_execution_plan" for d in planning_debt)

    gate_proposals = snap_body.get("gate_next_actions_proposals") or []
    assert gate_proposals
    assert any(p.get("reason_code") == "planning_debt" for p in gate_proposals)

    attention_codes = {a.get("code") for a in snap_body.get("attention_items") or []}
    assert "planning_debt" in attention_codes