"""Z01 공종 편집 — 규칙(순수 함수) · 요청 모델 · 저장 흐름(409·422·전부 아니면 전무) · 등록.

(2026-09-18 브레인 PLAN 1-0 계약 · sub_laptop_3) DB 없이 — 저장 흐름은 가짜 커넥션·저장소로 훑음.
"""

from __future__ import annotations

import importlib
from contextlib import asynccontextmanager
from decimal import Decimal

import pytest
from fastapi import FastAPI
from fastapi.routing import APIRoute
from fastapi.testclient import TestClient
from pydantic import ValidationError

from common_util.common_util_auth import require_system_admin, verify_session
from Z01_MasterData import Z01_MasterData_Router_WorkItems as router_module
from Z01_MasterData import Z01_MasterData_WorkItems as work_items

SEED_ROW = {"resource_kind": "labor", "resource_key": "L-001", "amount": 1.5, "sort_order": 0}


def _row(row_id, seed=SEED_ROW, **values):
    base = {"id": row_id, "variant": "", "resource_kind": "labor", "resource_key": "L-001"}
    return {**base, "amount": Decimal("1.500000"), "sort_order": 0, "seed": seed, **values}


# ── 규칙 ──


def test_고친_칸은_초기값과_값으로_비교함() -> None:
    assert work_items.changed_columns(_row(1), SEED_ROW, work_items.ROW_FIELDS) == []
    changed = _row(1, amount=Decimal("2"))
    assert work_items.changed_columns(changed, SEED_ROW, work_items.ROW_FIELDS) == ["amount"]
    assert work_items.changed_columns(_row(1, seed=None), None, work_items.ROW_FIELDS) == []


def test_검사는_남의_줄_겹친_줄_없는_자원을_막음() -> None:
    rows = [
        {"id": 1, "resource_key": "L-001"},
        {"id": 1, "resource_key": None},
        {"id": 99, "resource_key": None},
        {"id": None, "resource_key": "없는열쇠"},
    ]
    errors = work_items.check_rows(rows, existing_ids={1, 2}, known_keys={"L-001"})
    assert len(errors) == 3
    assert "두 번" in errors[0] and "id 99" in errors[1] and "없는열쇠" in errors[2]
    assert work_items.check_rows(rows[:1], {1}, {"L-001"}) == []


def test_전체_줄_보내기는_바뀐_줄만_쓰고_빠진_줄은_숨기거나_지움() -> None:
    existing = [_row(1), _row(2, sort_order=1), _row(3, seed=None, sort_order=2)]
    same = {f: existing[0].get(f) for f in work_items.ROW_FIELDS} | {"id": 1, "amount": 1.5}
    new = {"id": None, "resource_kind": "material", "resource_key": None, "amount": None}
    plan = work_items.plan_rows(existing, [same, new])
    assert plan["updates"] == []  # 1.500000 = 1.5 · 순서도 그대로
    assert plan["inserts"][0]["resource_kind"] == "material"
    assert plan["inserts"][0]["sort_order"] == 1
    assert plan["hide"] == [2]  # 초기값 줄 — 숨김(되살릴 수 있게)
    assert plan["drop"] == [3]  # 관리자 추가 줄 — 지움

    moved = work_items.plan_rows(existing[:2], [{**same, "id": 2}, same])
    assert [u["id"] for u in moved["updates"]] == [2, 1]  # 순서만 바뀌어도 sort_order 를 씀


def test_초기값으로는_seed_칸만_살리고_추가_줄은_지움() -> None:
    head = {"id": 7, "name": "고친 이름", "seed": {"name": "원 이름", "status": "partial"}}
    rows = [_row(1, amount=Decimal("9")), _row(2, is_deleted=1), _row(3, seed=None)]
    plan = work_items.reset_plan(head, rows)
    assert plan["head"] == {"name": "원 이름", "status": "partial"}
    assert [u["id"] for u in plan["updates"]] == [1, 2]
    assert plan["updates"][0]["amount"] == 1.5
    assert plan["drop"] == [3] and plan["inserts"] == [] and plan["hide"] == []


def test_상세는_seed_를_안_내보내고_고친_칸만_알림() -> None:
    head = {"id": 7, "work_item_key": "FW-00001", "name": "새", "status": "partial"}
    head |= {"seed": {"name": "옛"}, "source": [{"pum_table_id": "T1"}], "notes": ["[주] 1"]}
    out = work_items.detail(head, [_row(1), _row(2, seed=None)], revision=4)
    assert out["item"]["revision"] == 4 and out["item"]["changed_columns"] == ["name"]
    assert "seed" not in out["item"] and "id" not in out["item"]
    assert out["source"] == [{"pum_table_id": "T1"}] and out["notes"] == ["[주] 1"]
    assert [r["is_added"] for r in out["rows"]] == [False, True]
    assert out["rows"][0]["id"] == 1 and "seed" not in out["rows"][0]


# ── 요청 모델 ──


def _body(**row):
    item = {"name": "공종", "status": "reviewed"}
    return {"base_revision": 3, "item": item, "rows": [{"resource_kind": "labor", **row}]}


@pytest.mark.parametrize(
    "row",
    [{"amount": -1}, {"resource_key": ""}, {"resource_kind": "oil"}, {"unknown": 1}],
)
def test_요청_모델은_음수_빈열쇠_모르는_종류_모르는_칸을_막음(row) -> None:
    with pytest.raises(ValidationError):
        router_module.WorkItemSave.model_validate(_body(**row))


# ── 저장 흐름(가짜 커넥션) ──


class _Connection:
    def __init__(self) -> None:
        self.log: list[str] = []

    async def begin(self) -> None:
        self.log.append("begin")

    async def commit(self) -> None:
        self.log.append("commit")

    async def rollback(self) -> None:
        self.log.append("rollback")


@pytest.fixture
def client(monkeypatch):
    connection = _Connection()

    class _Pool:
        @asynccontextmanager
        async def acquire(self):
            yield connection

    head = {"id": 7, "work_item_key": "FW-00001", "name": "공종", "status": "partial"}
    head |= {"seed": {"name": "공종"}, "source": [], "notes": []}

    async def fetch_item(_c, key, lock=False):
        return dict(head) if key == "FW-00001" else None

    async def fetch_rows(_c, _item_id, with_deleted=False):
        return [_row(1)]

    async def revision(_c, _scope, lock=False):
        return 3

    async def known_resource_keys(_c, keys):
        return keys & {"L-001"}

    async def write(_c, *args):
        connection.log.append("write")

    async def bump_revision(_c, _scope):
        connection.log.append("bump")

    async def list_items(_c, **picked):
        connection.log.append(picked["status"])
        return {"items": [], "total": 2, "counts": {"partial": 2}}

    monkeypatch.setattr(router_module, "get_db_pool", lambda: _Pool())
    for name, fake in {
        "list_items": list_items,
        "fetch_item": fetch_item,
        "fetch_rows": fetch_rows,
        "revision": revision,
        "known_resource_keys": known_resource_keys,
        "write": write,
        "bump_revision": bump_revision,
    }.items():
        monkeypatch.setattr(router_module.repo, name, fake)
    app = FastAPI()
    app.include_router(router_module.router)
    app.dependency_overrides[verify_session] = lambda: {"user_id": 42}
    test_client = TestClient(app)
    test_client.log = connection.log
    return test_client


URL = "/api/master-data/work-items/FW-00001"


def test_낡은_revision_은_409_이고_아무것도_안_씀(client) -> None:
    response = client.put(URL, json={**_body(id=1, resource_key="L-001"), "base_revision": 2})
    assert response.status_code == 409
    assert client.log == ["begin", "rollback"]


def test_없는_자원_열쇠는_422_이고_아무것도_안_씀(client) -> None:
    response = client.put(URL, json=_body(resource_key="없는열쇠"))
    assert response.status_code == 422 and "없는열쇠" in response.json()["detail"]
    assert client.log == ["begin", "rollback"]


def test_맞는_저장은_쓰고_revision_올리고_새_상세를_줌(client) -> None:
    response = client.put(URL, json=_body(id=1, resource_key="L-001", amount=2))
    assert response.status_code == 200, response.text
    assert client.log == ["begin", "write", "bump", "commit"]
    assert response.json()["status"] == "success" and response.json()["item"]["revision"] == 3


def test_목록은_상태별_개수를_다_채우고_모르는_상태는_막음(client) -> None:
    body = client.get("/api/master-data/work-items?status=").json()
    assert body["counts"] == {s: 2 if s == "partial" else 0 for s in work_items.STATUSES}
    assert client.get("/api/master-data/work-items?status=needs_input").status_code == 200
    assert client.get("/api/master-data/work-items?status=bogus").status_code == 422
    assert client.log == ["", "needs_input"]


def test_초기값으로와_없는_공종(client) -> None:
    assert client.post(URL + "/reset").status_code == 200
    assert client.log == ["begin", "write", "bump", "commit"]
    assert client.get("/api/master-data/work-items/FW-99999").status_code == 404


# ── 등록 ──


def _calls(dependant) -> set:
    found = set()
    for sub in dependant.dependencies:
        found.add(sub.call)
        found |= _calls(sub)
    return found


def test_공종_편집_경로는_시스템_관리자만() -> None:
    app = importlib.import_module("main").app
    routes = {(r.path, m) for r in app.routes if isinstance(r, APIRoute) for m in r.methods}
    wanted = {
        ("/api/master-data/work-items", "GET"),
        ("/api/master-data/work-items/{key}", "GET"),
        ("/api/master-data/work-items/{key}", "PUT"),
        ("/api/master-data/work-items/{key}/reset", "POST"),
    }
    assert wanted <= routes
    for route in app.routes:
        if isinstance(route, APIRoute) and route.path.startswith("/api/master-data/work-items"):
            assert {verify_session, require_system_admin} <= _calls(route.dependant)