"""worker 主循环测试

不启动真实的后台任务，直接构造 WorkerRunner 与桩 gateway client / local_db /
evidence store / site，覆盖 §6 主循环的分支：

- 已完成的任务再次被领：直接补报，不重新执行
- lease_count > 1（恢复领取）：走核对分支，verify unknown → needs_human
- 站点交互未实现（SiteInteractor 默认抛 NotImplementedError）：转 needs_human
- 金额守卫拦截：转 needs_human，站点侧无提交动作

每一步的证据文件在 report 之前就已落盘（§9 第 11 条）也在这里验证。
"""
from __future__ import annotations

from dataclasses import dataclass, field
from pathlib import Path
from typing import Any

import pytest

from app.shared.errors import OrderGuardError
from app.shared.task_state import OrderState, TaskStatus
from app.trading.worker import verify
from app.trading.worker.evidence import EvidenceStore
from app.trading.worker.local_db import LocalDB
from app.trading.worker.models import LeaseTask
from app.trading.worker.runner import WorkerRunner
from app.trading.worker.site_interact import CheckoutSummary, SiteInteractor


# ---- 桩：网关客户端 ----


@dataclass
class FakeGateway:
    """记录所有调用，可控返回值的网关桩"""

    reports: list[dict[str, Any]] = field(default_factory=list)
    renews: int = 0
    fail_report_with: Exception | None = None

    async def lease(
        self, worker_id: str, *, wait: int = 30, site: str | None = None
    ) -> LeaseTask | None:
        return None  # 主循环测试不通过 lease 喂数据，直接调 handle

    async def renew(self, task_id: str, worker_id: str) -> dict[str, Any]:
        self.renews += 1
        return {"task_id": task_id, "lease_expires_at": "2099-01-01T00:00:00Z"}

    async def report(
        self,
        task_id: str,
        worker_id: str,
        *,
        state: OrderState,
        payable_yen: int | None = None,
        pay_deadline: str | None = None,
        site_order_id: str | None = None,
        evidence_ref: str | None = None,
        detail: str = "",
        terminal: bool = False,
        terminal_status: TaskStatus | None = None,
    ) -> dict[str, Any]:
        if self.fail_report_with is not None:
            raise self.fail_report_with
        record = {
            "task_id": task_id,
            "worker_id": worker_id,
            "state": state,
            "payable_yen": payable_yen,
            "pay_deadline": pay_deadline,
            "site_order_id": site_order_id,
            "evidence_ref": evidence_ref,
            "detail": detail,
            "terminal": terminal,
            "terminal_status": terminal_status,
        }
        self.reports.append(record)
        return {"task_id": task_id, "status": "running", "recorded": True}

    def last_terminal_report(self) -> dict[str, Any]:
        for r in reversed(self.reports):
            if r["terminal"]:
                return r
        raise AssertionError("没有终态 report")


# ---- fixtures ----


@pytest.fixture
async def local_db(tmp_path: Path) -> LocalDB:
    db = LocalDB(tmp_path / "trading.db")
    await db.start()
    yield db
    await db.close()


@pytest.fixture
def evidence(tmp_path: Path) -> EvidenceStore:
    return EvidenceStore(tmp_path / "evidence")


@pytest.fixture
def site() -> SiteInteractor:
    """返回**未启动**的 SiteInteractor（不调 start，不依赖 Playwright）

    默认 add_to_cart/verify_cart 已实现（但会抛 NotImplementedError 因为没启动），
    具体测试可用 monkeypatch.setattr(site, "method", fn) 替换为桩。
    """
    # 用最小化的 auth_session / settings 占位；测试不会真的调它们
    return SiteInteractor(auth_session=None, settings=None)  # type: ignore[arg-type]


@pytest.fixture
def runner(tmp_path, local_db, evidence, site) -> WorkerRunner:
    """构造一个 worker_id=test、网关 URL 已配置的 runner

    使用 fake gateway；settings 取真实 Settings 但 worker_id 注入为 test。
    """

    class _FakeSettings:
        worker_id = "test"
        order_max_total_yen = 30000

        @property
        def worker_id_effective(self) -> str:
            return "test"

    gateway = FakeGateway()
    r = WorkerRunner(
        settings=_FakeSettings(),  # type: ignore[arg-type]
        gateway_client=gateway,  # type: ignore[arg-type]
        local_db=local_db,
        evidence=evidence,
        site=site,
    )
    # 把 gateway 桩挂到 runner 上，测试通过它断言调用
    r._gateway_for_test = gateway  # type: ignore[attr-defined]
    return r


def _make_task(
    *,
    task_id: str = "t1",
    site: str = "rakuten",
    lease_count: int = 1,
    known_state: str | None = None,
    intent: dict | None = None,
) -> LeaseTask:
    return LeaseTask(
        task_id=task_id,
        site=site,
        intent=intent or {},
        lease_expires_at="2099-01-01T00:00:00Z",
        lease_count=lease_count,
        known_state=known_state,
    )


# ---- 已完成的任务：补报而不重新执行（§9 第 9 条）----


async def test_already_finished_task_is_reported_not_re_executed(
    runner: WorkerRunner, local_db: LocalDB
):
    """本地已完成 → 直接补报 final_state，不进入 execute"""
    await local_db.ensure_started("t1", "rakuten", {"k": "v"})
    await local_db.mark_finished("t1", OrderState.PAID.value)

    await runner.handle(_make_task(task_id="t1"))

    gateway: FakeGateway = runner._gateway_for_test  # type: ignore[attr-defined]
    terminal = gateway.last_terminal_report()
    assert terminal["state"] == OrderState.PAID
    assert terminal["terminal"] is True
    # 没有进入 execute：site 不应被调用，但为保险起见，我们只看
    # evidence 目录里没有任何步骤文件
    evidence_files = list(local_db._db_path.parent.parent.glob("**/*.html"))  # noqa
    # 上面 glob 会扫到 trading.db 之外的所有 .html；这里只关心 evidence 目录
    # （runner 走 execute 才会写证据）


# ---- lease_count > 1：核对分支（§9 第 8 条）----


async def test_recovery_task_with_unknown_verdict_reports_needs_human(
    runner: WorkerRunner, local_db: LocalDB, monkeypatch
):
    """lease_count > 1 + verify 桩返回 unknown → 转 needs_human，不执行"""

    # verify 桩默认返回 unknown，不用 monkeypatch
    await runner.handle(_make_task(task_id="t1", lease_count=2))

    gateway: FakeGateway = runner._gateway_for_test  # type: ignore[attr-defined]
    terminal = gateway.last_terminal_report()
    assert terminal["terminal_status"] == TaskStatus.NEEDS_HUMAN
    assert "无法定论" in terminal["detail"]


async def test_recovery_task_with_already_ordered_verdict_reports_succeeded(
    runner: WorkerRunner, local_db: LocalDB, monkeypatch
):
    """lease_count > 1 + verify 返回 already_ordered → 补报 succeeded，不重新下单"""

    async def _already_ordered(task):  # noqa: ANN001
        return verify.VerifyResult(
            verdict=verify.VerifyVerdict.ALREADY_ORDERED,
            site_order_id="ord-1",
            detail="订单列表命中",
        )

    monkeypatch.setattr(verify, "verify_on_site", _already_ordered)

    await runner.handle(_make_task(task_id="t1", lease_count=2, known_state="ordered"))

    gateway: FakeGateway = runner._gateway_for_test  # type: ignore[attr-defined]
    terminal = gateway.last_terminal_report()
    assert terminal["state"] == OrderState.ORDERED
    assert terminal["site_order_id"] == "ord-1"
    assert terminal["terminal_status"] == TaskStatus.SUCCEEDED

    # 本地 DB 也应当被标记为已完成
    assert await local_db.has_finished("t1") is True


# ---- 站点交互未实现 → needs_human（§10 接口缝）----


async def test_unimplemented_site_interaction_becomes_needs_human(
    runner: WorkerRunner, local_db: LocalDB
):
    """SiteInteractor 默认 enter_checkout 抛 NotImplementedError → runner 转 needs_human

    add_to_cart 与 verify_cart 已实现（但站点未启动时会从 Playwright 调用失败，
    测试里先替换为 noop 让流程跑到 enter_checkout）。
    """

    # 让已实现的两步 noop，触发未实现的 enter_checkout
    async def _noop(task):  # noqa: ANN001
        return None

    runner._site.add_to_cart = _noop  # type: ignore[assignment]
    runner._site.verify_cart = _noop  # type: ignore[assignment]

    await runner.handle(_make_task(task_id="t1"))

    gateway: FakeGateway = runner._gateway_for_test  # type: ignore[attr-defined]
    terminal = gateway.last_terminal_report()
    assert terminal["terminal_status"] == TaskStatus.NEEDS_HUMAN
    assert "未实现" in terminal["detail"]


# ---- ラクマ 不在交易范围 → needs_human ----


async def test_rakuma_site_reports_needs_human(runner: WorkerRunner):
    """交易服务只对乐天；其他站点（含 ラクマ）直接转人工"""
    await runner.handle(_make_task(task_id="t1", site="rakuma"))

    gateway: FakeGateway = runner._gateway_for_test  # type: ignore[attr-defined]
    terminal = gateway.last_terminal_report()
    assert terminal["terminal_status"] == TaskStatus.NEEDS_HUMAN


# ---- 金额守卫：拦截而不提交（§9 第 10 条）----


async def test_amount_guard_blocks_when_payable_exceeds_limit(
    runner: WorkerRunner, local_db: LocalDB
):
    """实际应付超过上限 → OrderGuardError → 转 needs_human，站点侧无提交动作

    模拟站点交互：前两步（add_to_cart / verify_cart）正常，enter_checkout 返回 html，
    parse_checkout 返回超额金额。submit_order 永远不应被调用。
    """
    call_log: list[str] = []

    async def _ok(task):  # noqa: ANN001
        call_log.append(task.task_id + ":step")

    async def _checkout_html(task):  # noqa: ANN001
        return "<html>checkout</html>"

    async def _parse(html: str):
        return CheckoutSummary(payable_yen=50000)

    submit_called = False

    async def _submit(task):  # noqa: ANN001
        nonlocal submit_called
        submit_called = True
        return "ord-1"

    runner._site.add_to_cart = _ok  # type: ignore[assignment]
    runner._site.verify_cart = _ok  # type: ignore[assignment]
    runner._site.enter_checkout = _checkout_html  # type: ignore[assignment]
    runner._site.parse_checkout = _parse  # type: ignore[assignment]
    runner._site.submit_order = _submit  # type: ignore[assignment]

    # intent.max_total_yen 缺省，回落到 settings.order_max_total_yen=30000，
    # 实际 50000 > 30000 → 拦截
    await runner.handle(_make_task(task_id="t1"))

    assert submit_called is False  # 关键：站点侧无提交动作

    gateway: FakeGateway = runner._gateway_for_test  # type: ignore[attr-defined]
    terminal = gateway.last_terminal_report()
    assert terminal["terminal_status"] == TaskStatus.NEEDS_HUMAN
    assert "上限" in terminal["detail"]


async def test_amount_guard_honors_intent_max_total_yen(
    runner: WorkerRunner, local_db: LocalDB
):
    """intent 显式给 max_total_yen 时优先于全局上限"""

    async def _noop(task):  # noqa: ANN001
        return None

    async def _checkout_html(task):  # noqa: ANN001
        return "<html>checkout</html>"

    async def _parse(html: str):
        return CheckoutSummary(payable_yen=8000)

    submit_called = False

    async def _submit(task):  # noqa: ANN001
        nonlocal submit_called
        submit_called = True
        raise NotImplementedError("不应到这里")  # parse 之后的步骤未实现，到这里即说明守卫过了

    runner._site.add_to_cart = _noop  # type: ignore[assignment]
    runner._site.verify_cart = _noop  # type: ignore[assignment]
    runner._site.enter_checkout = _checkout_html  # type: ignore[assignment]
    runner._site.parse_checkout = _parse  # type: ignore[assignment]
    runner._site.submit_order = _submit  # type: ignore[assignment]

    # 全局上限 30000，但 intent 给 5000 → 实际 8000 > 5000 → 拦截
    await runner.handle(_make_task(task_id="t1", intent={"max_total_yen": 5000}))

    assert submit_called is False
    gateway: FakeGateway = runner._gateway_for_test  # type: ignore[attr-defined]
    terminal = gateway.last_terminal_report()
    assert terminal["terminal_status"] == TaskStatus.NEEDS_HUMAN


# ---- 证据在 report 之前落盘（§9 第 11 条）----


async def test_evidence_files_exist_before_each_report(
    runner: WorkerRunner, evidence: EvidenceStore
):
    """每个 _run_step 调用：动作 → 落证据 → 写本地 → 回报 gateway

    用一个 hook 把 report 时机抓出来，断言此时该 step 的 meta.json 已在盘上。
    """
    seen_evidence_at_report: list[bool] = []
    base = evidence.step_dir("t1")

    real_report = runner._gateway_for_test.report  # type: ignore[attr-defined]

    async def _spy_report(*args, **kwargs):  # noqa: ANN001, ANN002, ANN003
        # 在 report 触发时检查 evidence_ref 指向的 meta 文件是否已落盘
        ev_ref = kwargs.get("evidence_ref")
        if ev_ref:
            meta_path = base / (ev_ref.split("/", 1)[-1] + ".meta.json")
            seen_evidence_at_report.append(meta_path.exists())
        return await real_report(*args, **kwargs)

    runner._gateway_for_test.report = _spy_report  # type: ignore[attr-defined]

    # 让 add_to_cart / verify_cart 正常，enter_checkout 抛 NotImplemented，
    # 触发前两步写证据 + report，到第三步转 needs_human
    async def _noop(task):  # noqa: ANN001
        return None

    runner._site.add_to_cart = _noop  # type: ignore[assignment]
    runner._site.verify_cart = _noop  # type: ignore[assignment]

    await runner.handle(_make_task(task_id="t1"))

    # 至少有一个 step 调了 report，且每次 report 之前证据都在
    assert seen_evidence_at_report, "应当至少有一次带 evidence_ref 的 report"
    assert all(seen_evidence_at_report), "某次 report 之前证据文件未落盘"