"""Z01 기초단가 다섯 — 노임·기계·자재·유가·요율을 kind 마다 **한 표**로(2026-09-15 사용자 지시 · 브레인 계약).

표 수준(한 번): columns · total · editable · locked{열: 왜 못 고치나} · formula{열: 식} · notice(요율만)
줄 수준(해당할 때만): `@id`(자료 제 열쇠) · `@overrides`(고친 줄) · `@formula`(계산값 줄)
`@id` — 줄 차례가 아니라 자료 열쇠(브레인 승인): 노임 `{dataset_id}/{occupation_code}` · 기계 machine_code ·
  자재 item_code · 유가 `{scope}/{변수}[/{sido_code}]` · 요율 `{변수}[/{목록}/{구간칸=값;…}]`(구간 칸 이름 차례 · 값·식 칸 뺌)
원본 파일 자리는 이름표 파일이 가리키는 곳(`Z01_MasterData_Tables`) — 원본은 읽기만, 고친 값은 덮개(`Z01_MasterData_Overrides`).
"""

from __future__ import annotations

import json
from decimal import Decimal
from functools import lru_cache
from pathlib import Path
from typing import Any

from Z01_MasterData import Z01_MasterData_BasePrices_Machine as machine
from Z01_MasterData import Z01_MasterData_Overrides as overrides
from Z01_MasterData import Z01_MasterData_Tables as tables

KINDS = ("labor", "machine", "material", "oil", "rate")
_KEY = "자료 열쇠 — 바꾸면 덮개·다른 표가 이 줄을 못 찾음"
_SOURCE = "공표 원문 칸 — 원본 갱신으로만 바뀜"
_RATE_EDITABLE = (
    "rate_percent",
    "base_amount_krw",
    "minimum_estimated_amount_krw",
    "minimum_total_construction_amount_krw",
    "rate_from_2033_percent",
    "manager_thresholds.default_estimated_amount_krw",
    "manager_thresholds.civil_main_work_estimated_amount_krw",
)
_RATE_NOTICE = "법이 정한 값 — 고치면 원본 갱신 때 구간 이름이 바뀌어 고친 값이 주인을 잃기 쉬움(주인 없음으로 남음)"


def _source(file_id: str) -> Path:
    labels = tables.load_labels()
    entry = next((f for f in labels["files"] if f["file_id"] == file_id), None)
    path = tables._file_path(entry) if entry else None
    if path is None:
        raise FileNotFoundError(f"이름표에 원본 자리가 없음: {file_id}")
    return path


@lru_cache(maxsize=16)
def _read(path: str, _mtime_ns: int) -> dict[str, Any]:
    return json.loads(Path(path).read_text(encoding="utf-8"))


def _doc(file_id: str) -> tuple[dict[str, Any], str]:
    path = _source(file_id)
    return _read(str(path), path.stat().st_mtime_ns), path.name


def _records(doc: dict[str, Any]) -> list[dict[str, Any]]:
    return next(
        v["records"] for v in doc["variables"].values() if isinstance(v.get("records"), list)
    )


def _labor() -> list[dict[str, Any]]:
    rows = []
    for file_id in ("labor_const", "labor_mfg"):
        doc, name = _doc(file_id)
        dataset = doc.get("dataset_id") or file_id
        for r in _records(doc):
            # 기준일 — 두 판(건설 · 제조) 기준일이 달라 한 표에 섞임 → 칸으로 드러냄
            row = {
                "@id": f"{dataset}/{r['occupation_code']}",
                "@source": name,
                "dataset_id": dataset,
                "effective_date": doc.get("effective_date"),
                **r,
            }
            row.setdefault("daily_wage_krw", None)  # 미공표 직종 — 사람이 넣을 수 있음
            rows.append(row)
    return rows


def _material() -> list[dict[str, Any]]:
    doc, name = _doc("mat_price_public")
    date = doc.get("effective_date")
    return [
        {"@id": str(r["item_code"]), "@source": name, "effective_date": date, **r}
        for r in _records(doc)
    ]


def _oil() -> list[dict[str, Any]]:
    rows = []
    for file_id in ("oil", "oil_regional"):
        doc, name = _doc(file_id)
        for variable, v in doc["variables"].items():
            head = {k: x for k, x in v.items() if k not in ("records", "value")}
            common = {
                "scope": v.get("scope"),
                "fuel": variable,
                "effective_date": doc.get("effective_date"),  # 전국 · 지역 판 기준일이 다름
                **head,
            }
            if "records" not in v:
                rows.append(
                    {
                        "@id": f"{v.get('scope')}/{variable}",
                        "@source": name,
                        **common,
                        "value": v.get("value"),
                    }
                )
            for r in v.get("records") or []:
                rows.append(
                    {
                        "@id": f"{v.get('scope')}/{variable}/{r['sido_code']}",
                        "@source": name,
                        **common,
                        **r,
                    }
                )
    return rows


def _flat(d: dict[str, Any], prefix: str = "") -> dict[str, Any]:
    out: dict[str, Any] = {}
    for k, v in d.items():
        if isinstance(v, dict):
            out.update(_flat(v, f"{prefix}{k}."))
        elif not isinstance(v, list):
            out[f"{prefix}{k}"] = v
    return out


def _rate() -> list[dict[str, Any]]:
    doc, name = _doc("rates")
    rows = []
    for variable, v in doc["variables"].items():
        rows.append(
            {
                "@id": variable,
                "@source": name,
                "variable": variable,
                "part": "",
                "effective_date": doc.get("effective_date"),
                **_flat(v),
            }
        )
        for part, items in v.items():
            if not (isinstance(items, list) and items and all(isinstance(x, dict) for x in items)):
                continue
            for item in items:
                bracket = ";".join(
                    f"{k}={item[k]}"
                    for k in sorted(item)
                    if k not in _RATE_EDITABLE
                    and k != "formula"
                    and not isinstance(item[k], (dict, list))
                )
                rows.append(
                    {
                        "@id": f"{variable}/{part}/{bracket}",
                        "@source": name,
                        "variable": variable,
                        "part": part,
                        "effective_date": doc.get("effective_date"),
                        "base": v.get("base"),
                        **item,
                    }
                )
    return rows


_BUILDERS = {"labor": _labor, "material": _material, "oil": _oil, "rate": _rate}


def base_rows(kind: str) -> list[dict[str, Any]]:
    """덮개 얹기 전 원본 줄 — 기계는 입력 칸까지(계산 칸은 덮개를 얹은 뒤 셈)."""
    if kind == "machine":
        doc, name = _doc("mach_base")
        return machine.base_rows(name, doc.get("effective_date"))
    return _BUILDERS[kind]()


def _machine_inputs() -> machine.Inputs:
    """기계가 끌어 쓰는 밑값 — **덮개를 얹은** 노임(건설)·전국평균 유가 + 그 판들의 기준일."""
    labor = [r for r in overrides.overlay("labor", _labor()) if r["dataset_id"] == "labor_const"]
    oil = [
        r for r in overrides.overlay("oil", _oil()) if r["@id"] == f"national_average/{r['fuel']}"
    ]
    return machine.Inputs(
        wages={
            str(r["occupation_code"]): None
            if r["daily_wage_krw"] is None
            else Decimal(str(r["daily_wage_krw"]))
            for r in labor
        },
        wage_date=labor[0]["effective_date"] if labor else None,
        oil={r["fuel"]: Decimal(str(r["value"])) for r in oil},
        oil_dates={r["fuel"]: r.get("date") or r["effective_date"] for r in oil},
        operating_date=_doc("pum_const")[0].get("effective_date"),
    )


def rows(kind: str) -> list[dict[str, Any]]:
    """덮개를 얹은 줄 — 기계는 그 위에서 시간당 단가를 다시 셈."""
    out = overrides.overlay(kind, base_rows(kind))
    if kind == "machine":
        inputs = _machine_inputs()
        out = [machine.compute(r, inputs) for r in out]
    return out


def _columns(kind: str, all_rows: list[dict[str, Any]]) -> list[str]:
    keys: dict[str, None] = {}
    for r in all_rows:
        keys.update(dict.fromkeys(k for k in r if not k.startswith("@")))
    return list(keys)


def spec(kind: str, columns: list[str]) -> dict[str, Any]:
    """표 수준 — editable · locked · formula (· notice)."""
    if kind == "machine":
        return machine.spec(columns)
    editable = {
        "labor": ["daily_wage_krw"],
        "material": ["price_krw"],
        "oil": ["value"],
        "rate": [c for c in _RATE_EDITABLE if c in columns],
    }[kind]
    keys = {"labor": {"dataset_id", "occupation_code"}, "material": {"item_code"}}.get(kind, set())
    if kind == "oil":
        keys = {"scope", "fuel", "sido_code"}
    if kind == "rate":
        locked = {
            c: "규칙·구간 칸(로직) — 원본 갱신으로만 바뀜" for c in columns if c not in editable
        }
    else:
        locked = {c: _KEY if c in keys else _SOURCE for c in columns if c not in editable}
    out: dict[str, Any] = {"editable": editable, "locked": locked, "formula": {}}
    if kind == "rate":
        out["notice"] = _RATE_NOTICE
    return out


def row_label(kind: str, row: dict[str, Any] | None) -> str:
    if row is None:
        return ""
    if kind == "labor":
        return str(row.get("occupation_name") or "")
    if kind == "machine":
        return f"{row.get('machine_name') or ''} {row.get('specification') or ''}".strip()
    if kind == "material":
        return str(row.get("specification") or row.get("classification_name") or "")
    if kind == "oil":
        return f"{row.get('source_product_name') or row.get('fuel')} {row.get('sido_name') or '전국평균'}"
    named = (tables.load_labels().get("value_overrides") or {}).get(
        f"rates::variables/{row['variable']}"
    ) or {}
    bracket = row["@id"].split("/", 2)[2].replace(";", " · ") if row["part"] else ""
    return f"{named.get('name_ko') or row['variable']} {bracket}".strip()


def column_meta(kind: str, key: str) -> dict[str, Any]:
    """열 이름 — 이름표 `synthetic_tables['@base_prices/{kind}']` → `columns[열key]` → 영문 key."""
    labels = tables.load_labels()
    own = (labels.get("synthetic_tables") or {}).get(f"@base_prices/{kind}") or {}
    named = next((c for c in own.get("columns") or [] if c.get("key") == key), None)
    named = named or labels["columns"].get(key) or {}
    return {
        "key": key,
        "label": named.get("name_ko") or key,
        "unit": named.get("unit") or "",
        "hidden": named.get("visible") is False,
    }


def public(row: dict[str, Any]) -> dict[str, Any]:
    """내보낼 줄 — 안쪽 칸(`@source`)은 뺌."""
    return {k: v for k, v in row.items() if k != "@source"}


def table(
    kind: str, page: int = 1, size: int = tables.DEFAULT_PAGE_SIZE, q: str = ""
) -> dict[str, Any]:
    all_rows = rows(kind)
    columns = _columns(kind, all_rows)
    needle = q.strip().lower()
    hits = (
        [
            r
            for r in all_rows
            if needle in json.dumps(public(r), ensure_ascii=False, default=str).lower()
        ]
        if needle
        else all_rows
    )
    size = max(1, min(size, tables.MAX_PAGE_SIZE))
    start = (max(page, 1) - 1) * size
    return {
        "columns": [column_meta(kind, c) for c in columns],
        "rows": [public(r) for r in hits[start : start + size]],
        "total": len(hits),
        **spec(kind, columns),
    }


def edit(kind: str, row_id: str, values: dict[str, Any], by: Any) -> tuple[int, dict[str, Any]]:
    """고치기 — (상태 코드, 고친 뒤 그 줄 또는 막은 까닭)."""
    base = next((r for r in base_rows(kind) if r["@id"] == row_id), None)
    if base is None:
        return 404, {"message": f"없는 줄: {row_id}"}
    info = spec(kind, _columns(kind, rows(kind)))
    for column, value in values.items():
        if column not in info["editable"] or column not in base:
            reason = info["locked"].get(column) or "이 줄에 없는 칸"
            return 400, {"message": f"못 고치는 칸 {column} — {reason}"}
        problem = overrides.check_value(value)
        if problem:
            return 400, {"message": f"{column}: {problem}"}
    overrides.write(kind, base, values, by)
    return 200, public(next(r for r in rows(kind) if r["@id"] == row_id))


def override_items(
    kind: str = "", state: str = "", page: int = 1, size: int = tables.DEFAULT_PAGE_SIZE
) -> dict[str, Any]:
    """모아 보기 — 서버가 정렬(원본 바뀜 → 주인 없음 → 고쳐짐) · 거름(kind·state) · 쪽 · kind 별 state 수."""
    out = []
    counts: dict[str, dict[str, int]] = {}
    for each in KINDS:  # 수는 늘 다섯 다 셈 — 거름은 줄에만
        base = base_rows(each)
        by_id = {r["@id"]: r for r in base}
        for item in overrides.items(each, base):
            counts.setdefault(each, {}).setdefault(item["state"], 0)
            counts[each][item["state"]] += 1
            if (kind and each != kind) or (state and item["state"] != state):
                continue
            item["row_label"] = row_label(each, by_id.get(item["row_id"]))
            item["column_label"] = column_meta(each, item["column"])["label"]
            out.append(item)
    out.sort(key=lambda i: overrides.STATE_ORDER.index(i["state"]))
    size = max(1, min(size, tables.MAX_PAGE_SIZE))
    start = (max(page, 1) - 1) * size
    return {"items": out[start : start + size], "total": len(out), "counts": counts}


def clear_overrides(kind: str, state: str) -> int:
    return overrides.clear(kind, state, base_rows(kind))