"""Approvals and feedback bind to the plan revision they were about (A4)."""

import io
from pathlib import Path

from nisse_dev.canonical import UserMessage
from nisse_dev.control import (
    AWAIT_MILESTONE_SIGNOFF,
    Orchestrator,
    StubAgent,
)
from nisse_dev.gitea import Comment
from nisse_dev.oplog import OpLog
from nisse_dev.state import StateStore
from nisse_dev.transport import InMemoryTransport


class Held:
    """A worker that queues jobs until released, like one under load."""

    def __init__(self) -> None:
        self.jobs: list = []
        self.busy = False

    def submit(self, job) -> None:
        self.jobs.append(job)

    def call(self, job, timeout=None):
        return job()

    def run(self) -> None:
        while self.jobs:
            self.jobs.pop(0)()


class Board:
    def __init__(self) -> None:
        self.next_id = 100

    def open_project_issue(self, project: str, task_id: str) -> int:
        return 10

    def post_plan(self, issue: int, gate: str, rev: int, plan: str):
        self.next_id += 1

        class Posted:
            comment_id = self.next_id

        return Posted()

    def echo(self, issue: int, text: str) -> None:
        pass


def build(tmp_path: Path, worker: Held | None = None, board: Board | None = None):
    store = StateStore(tmp_path / "state.db", oplog=OpLog("nisse-dev", io.StringIO()))
    transport = InMemoryTransport()
    orch = Orchestrator(
        store,
        transport,
        StubAgent(),
        operators={"don"},
        gitea_operators={"don"},
        board=board,
        **({"worker": worker} if worker else {}),
    )
    orch.start()
    return store, transport, orch


def gate(store: StateStore) -> dict:
    return store.get_state().data.get("gate") or {}


def test_revisions_run_across_the_task(tmp_path: Path) -> None:
    store, transport, _ = build(tmp_path)
    transport.receive("don", "use demo")
    assert gate(store)["rev"] == 1
    transport.receive("don", "approve")
    assert gate(store) == {**gate(store), "name": "milestone-1", "rev": 2}
    assert "milestone-1 rev-2" in transport.outbound[-1].text


def test_a_stale_approval_is_answered_and_a_fresh_one_works(tmp_path: Path) -> None:
    worker = Held()
    store, transport, _ = build(tmp_path, worker)
    transport.receive("don", "use demo")
    worker.run()
    transport.receive("don", "approve")
    transport.receive("don", "approve")  # both while arch rev-1 was up
    worker.run()
    assert store.get_state().state == AWAIT_MILESTONE_SIGNOFF
    assert not gate(store)["approved"]
    assert "arrived while rev-1 was up" in transport.outbound[-1].text
    transport.receive("don", "approve")  # now about milestone-1 rev-2
    worker.run()
    assert gate(store)["approved"]


def test_stale_feedback_is_recorded_but_rejects_nothing(tmp_path: Path) -> None:
    worker = Held()
    store, transport, _ = build(tmp_path, worker)
    transport.receive("don", "use demo")
    worker.run()
    transport.receive("don", "approve")
    transport.receive("don", "also, keep it in one file")
    worker.run()
    assert store.get_state().state == AWAIT_MILESTONE_SIGNOFF
    assert gate(store)["rev"] == 2
    assert "not taken as feedback" in transport.outbound[-1].text
    said = [
        e.event.text for e in store.read_events() if isinstance(e.event, UserMessage)
    ]
    assert "also, keep it in one file" in said  # the planner still hears it


def test_a_gitea_reply_binds_to_the_latest_plan_posted_before_it(
    tmp_path: Path,
) -> None:
    board = Board()
    store, transport, orch = build(tmp_path, board=board)
    transport.receive("don", "use demo")  # arch rev-1 posted as comment 101
    orch._handle_plan_comment_now(
        Comment(id=102, author="don", body="approve", created_at="t")
    )
    # Approved arch rev-1; milestone-1 rev-2 is now posted as comment 103.
    assert gate(store) == {**gate(store), "name": "milestone-1", "approved": False}
    # A reply older than that post was about arch rev-1: not applied.
    orch._handle_plan_comment_now(
        Comment(id=102, author="don", body="approve", created_at="t")
    )
    assert not gate(store)["approved"]
    # One after it is about milestone-1 rev-2.
    orch._handle_plan_comment_now(
        Comment(id=104, author="don", body="approve", created_at="t")
    )
    assert gate(store)["approved"]


def test_the_plan_up_survives_a_restart(tmp_path: Path) -> None:
    _, transport, _ = build(tmp_path)
    transport.receive("don", "use demo")  # arch rev-1 up; no board, so unsaved
    store, transport, _ = build(tmp_path)  # restart at the open gate
    transport.receive("don", "approve")  # stamped with the restored rev-1
    assert store.get_state().state == AWAIT_MILESTONE_SIGNOFF
    assert gate(store)["name"] == "milestone-1"
    assert gate(store)["rev"] == 2