"""The `abandon` command: ending a task from any waiting state (A4, B2)."""

import io
from pathlib import Path
from typing import Any

import pytest

from nisse_dev.control import (
    AWAIT_ARCH_SIGNOFF,
    AWAIT_INPUT,
    AWAIT_MILESTONE_SIGNOFF,
    IDLE,
    PR_OPEN,
    AskHuman,
    Orchestrator,
    SubmitPlan,
)
from nisse_dev.executor import ExecutorOutcome
from nisse_dev.gitea import GiteaError, PullRequest
from nisse_dev.oplog import OpLog
from nisse_dev.publish import PublishResult
from nisse_dev.state import StateStore
from nisse_dev.transport import InMemoryTransport


class Planner:
    def __init__(self, ask_first: bool = False) -> None:
        self._ask = ask_first

    def plan(
        self,
        gate: str,
        project: str,
        feedback: str | None = None,
        answer: str | None = None,
    ) -> SubmitPlan | AskHuman:
        if self._ask and answer is None:
            return AskHuman("which language?")
        return SubmitPlan(f"{gate} plan")


class Board:
    def __init__(self, *, fail_close: bool = False) -> None:
        self.closed: list[tuple[int, str]] = []
        self._fail_close = fail_close

    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) -> Any:
        class Posted:
            comment_id = 1

        return Posted()

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

    def close(self, issue: int, note: str) -> None:
        if self._fail_close:
            raise GiteaError("gitea is down")
        self.closed.append((issue, note))


class Executor:
    def run(self, milestone: int) -> ExecutorOutcome:
        return ExecutorOutcome("completed", "done")


class Publisher:
    def __init__(self) -> None:
        self.closed: list[tuple[int, str]] = []

    def reconcilers(self) -> dict[str, Any]:
        return {}

    def publish(self, **kwargs: Any) -> PublishResult:
        pr = PullRequest(number=20, state="open", head="h", url="u")
        return PublishResult(pr, "opened PR #20")

    def close_pull_request(self, index: int, note: str) -> None:
        self.closed.append((index, note))


class Harness:
    def __init__(
        self, tmp_path: Path, *, ask_first: bool = False, board: Board | None = None
    ) -> None:
        self.store = StateStore(
            tmp_path / "state.db", oplog=OpLog("nisse-dev", io.StringIO())
        )
        self.transport = InMemoryTransport()
        self.board = board or Board()
        self.publisher = Publisher()
        Orchestrator(
            self.store,
            self.transport,
            Planner(ask_first),
            operators={"don"},
            board=self.board,
            executor=Executor(),
            publisher=self.publisher,
        ).start()

    @property
    def state(self) -> str:
        state = self.store.get_state()
        assert state is not None
        return state.state

    def say(self, *replies: str) -> None:
        for reply in replies:
            self.transport.receive("don", reply)


WAITING = [
    ("arch sign-off", ["use demo"], AWAIT_ARCH_SIGNOFF),
    ("milestone sign-off", ["use demo", "approve"], AWAIT_MILESTONE_SIGNOFF),
    (
        "approved, not started",
        ["use demo", "approve", "approve"],
        AWAIT_MILESTONE_SIGNOFF,
    ),
    ("PR open", ["use demo", "approve", "approve", "start milestone 1"], PR_OPEN),
]


@pytest.mark.parametrize(
    ("replies", "waiting"),
    [(r, w) for _, r, w in WAITING],
    ids=[n for n, _, _ in WAITING],
)
def test_abandon_ends_the_task_from_any_waiting_state(
    tmp_path: Path, replies: list[str], waiting: str
) -> None:
    h = Harness(tmp_path)
    h.say(*replies)
    assert h.state == waiting
    h.say("abandon")
    state = h.store.get_state()
    assert state.state == IDLE
    assert state.project is None
    assert "abandoned" in h.transport.outbound[-1].text
    assert h.board.closed == [(10, "abandoned by don")]
    # A new task starts cleanly afterwards.
    h.say("use other")
    assert h.state == AWAIT_ARCH_SIGNOFF


def test_abandon_answers_a_question_by_ending_the_task(tmp_path: Path) -> None:
    h = Harness(tmp_path, ask_first=True)
    h.say("use demo")
    assert h.state == AWAIT_INPUT
    h.say("abandon")
    assert h.state == IDLE


def test_abandon_in_pr_open_closes_the_pr(tmp_path: Path) -> None:
    h = Harness(tmp_path)
    h.say("use demo", "approve", "approve", "start milestone 1")
    h.say("abandon")
    assert h.publisher.closed == [(20, "abandoned by don")]


def test_abandon_aborts_a_pending_publish_intent(tmp_path: Path) -> None:
    h = Harness(tmp_path)
    h.say("use demo")
    h.store.begin_intent("open_pr", {"branch": "b"}, cause="publish cut short")
    h.say("abandon")
    assert h.store.pending_intents() == []


def test_abandon_still_ends_the_task_when_gitea_is_down(tmp_path: Path) -> None:
    h = Harness(tmp_path, board=Board(fail_close=True))
    h.say("use demo", "abandon")
    assert h.state == IDLE
    assert "could not close plan issue #10" in h.transport.outbound[-1].text


def test_abandon_with_no_task_says_so(tmp_path: Path) -> None:
    h = Harness(tmp_path)
    h.say("abandon")
    assert h.state == IDLE
    assert "nothing to abandon" in h.transport.outbound[-1].text