"""B09 제비율 요율표 화면 자료 — STmate 「원가계산기준」(wM_KAN_RATE) 첫 탭 차례 (PLAN 12장).

⚠ 요율 데이터(`rates_<연도>.json`)를 **읽어 보이기만** 한다 — 묶음 제목·산식 표기는 DFM
  `TWM_KAN_RATE` 첫 탭(☞ 공사원가계산 제잡비율) 차례를 따르고, 값·구간은 우리 데이터 그대로.
⚠ 수정은 아직 없음 — 엔진이 프로젝트 덮어쓰기 요율을 받는 칸이 서야 열 수 있음.
"""

from __future__ import annotations

from decimal import Decimal
from typing import Any

from B09_Estimation.B09_Estimation_CostSheet import SAFETY_LABELS, WORK_TYPE_LABELS
from B09_Estimation.B09_Estimation_Rates import RateDataset, _bracket_bounds, _duration_bounds

_EOK = Decimal(100_000_000)


def _won(amount: Decimal) -> str:
    """원 → 「50억」·「5천만」 표기."""
    if amount >= _EOK:
        return f"{amount / _EOK:g}억"
    return f"{amount / 10_000_000:g}천만"


def amount_label(label: str) -> str:
    """구간 키 → 사람 표기. 모르는 키는 그대로(지어내지 않음)."""
    bounds = _bracket_bounds(label)
    if bounds is None:
        return label
    low, high = bounds
    if low == 0:
        return f"{_won(high)} 미만"
    if high == Decimal("Infinity"):
        return f"{_won(low)} 이상" + (" " + label.split("_", 3)[-1] if label.count("_") > 2 else "")
    return f"{_won(low)}~{_won(high)} 미만"


def duration_label(label: str) -> str:
    bounds = _duration_bounds(label)
    if bounds is None:
        return label
    low, high = bounds
    if low == 0:
        return f"{high}일 이하"
    if high >= 10**9:
        return f"{low}일 이상"
    return f"{low}~{high}일"


def _type(value: str, safety: bool = False) -> str:
    return {**WORK_TYPE_LABELS, **(SAFETY_LABELS if safety else {})}.get(value, value)


def _pivot(rows: list[dict[str, Any]], row_keys: tuple[str, ...], col_key: str, safety=False):
    """세로 줄을 (구간…) × 공종 표로 편다 — DFM 표 모양(행 구간 · 열 공종)."""
    columns = list(dict.fromkeys(str(row[col_key]) for row in rows))
    grid: dict[tuple[str, ...], dict[str, Any]] = {}
    for row in rows:
        grid.setdefault(tuple(str(row[k]) for k in row_keys), {})[str(row[col_key])] = row
    return columns, grid


def rate_sections(dataset: RateDataset) -> list[dict[str, Any]]:
    """묶음 목록 `{title, formula, columns, rows}` — DFM 첫 탭 위→아래 차례."""
    v = dataset.variables
    sections: list[dict[str, Any]] = []

    overhead = v["rate_overhead"]["civil_landscape_industrial"]
    profit = {
        row["estimated_price_bracket"]: row["rate_percent"] for row in v["rate_profit"]["brackets"]
    }
    sections.append(
        {
            "title": "일반관리비 · 이윤",
            "formula": "일반관리비 (재+노+경) × 율 · 이윤 (노+경+일) × 율",
            "columns": ["공사규모(추정가격)", "일반관리비(%)", "이윤(%)"],
            "rows": [
                [
                    amount_label(row["estimated_price_bracket"]),
                    row["rate_percent"],
                    profit.get(row["estimated_price_bracket"], ""),
                ]
                for row in overhead
            ],
        }
    )
    for variable, title, formula in (
        ("rate_indirect_labor", "간접노무비", "(직접노무비) × 율(%)"),
        ("rate_other_expense", "기타경비", "(재료비+노무비) × 율(%)"),
    ):
        columns, grid = _pivot(
            v[variable]["brackets"], ("direct_cost_bracket", "duration_bracket"), "work_type"
        )
        sections.append(
            {
                "title": title,
                "formula": formula,
                "columns": ["공사규모(직접공사비)", "공사기간", *(_type(c) for c in columns)],
                "rows": [
                    [
                        amount_label(size),
                        duration_label(days),
                        *(cells[c]["rate_percent"] if c in cells else "" for c in columns),
                    ]
                    for (size, days), cells in grid.items()
                ],
            }
        )
    sections.append(
        {
            "title": "고용보험료",
            "formula": "(노무비) × 율",
            "columns": ["등급", "추정금액", "요율(%)"],
            "rows": [
                [row["grade"], amount_label(row["estimated_amount_bracket"]), row["rate_percent"]]
                for row in v["rate_goyong"]["brackets"]
            ],
        }
    )
    columns, grid = _pivot(
        v["rate_safety_pct"]["brackets"], ("target_amount_bracket",), "work_type"
    )
    sections.append(
        {
            "title": "산업안전보건관리비",
            "formula": "(재료비+직접노무비+관급자재) × 율 + 기초액",
            "columns": ["대상액", *(f"{_type(c, safety=True)}(%)" for c in columns), "기초액(원)"],
            "rows": [
                [
                    amount_label(size),
                    *(cells[c]["rate_percent"] if c in cells else "" for c in columns),
                    next(
                        (
                            cells[c].get("base_amount_krw")
                            for c in columns
                            if cells.get(c, {}).get("base_amount_krw")
                        ),
                        "",
                    ),
                ]
                for (size,), cells in grid.items()
            ],
        }
    )
    sections.append(
        {
            "title": "환 경 보 전 비",
            "formula": "(재료비+직접노무비+산출경비) × 율",
            "columns": ["구 분", "요율(%)"],
            "rows": [
                [_type(row["work_type"]), row["rate_percent"]]
                for row in v["rate_environment"]["all_work_types"]
            ],
        }
    )
    sections.append(
        {
            "title": "공사이행보증수수료",
            "formula": "[추가금액 + (직접공사비-기준금액) × 율] × 공기(년)",
            "columns": ["공사규모(직접공사비)", "수수료 산식"],
            "rows": [
                [
                    amount_label(row["direct_cost_bracket"]),
                    str(row.get("formula", ""))
                    .replace("direct_cost", "직공비")
                    .replace("duration_years", "공기(년)"),
                ]
                for row in v["rate_performance_guarantee_fee"]["brackets"]
            ],
        }
    )
    sections.append(
        {
            "title": "건설하도급대금지급보증서발급수수료",
            "formula": "(직접공사비) × 율",
            "columns": ["공사규모", "요율(%)"],
            "rows": [
                [amount_label(row["estimated_price_bracket"]), row["rate_percent"]]
                for row in v["rate_subcontract_payment_guarantee"]["brackets"]
            ],
        }
    )
    equipment = v["rate_equipment_payment_guarantee"]
    sections.append(
        {
            "title": "건설기계대여대금 지급보증서 발급금액",
            "formula": "(직접공사비) × 율",
            "columns": ["구 분", "요율(%)"],
            "rows": [
                *(
                    [_type(row["work_type"]), row["rate_percent"]]
                    for row in equipment["general_construction"]
                ),
                *(
                    ["전문건설 — " + row["work_type"], row["rate_percent"]]
                    for row in equipment["specialty_construction"]
                ),
            ],
        }
    )
    pension = next(
        (
            row["rate_percent"]
            for row in v["rate_pension"]["annual_rates"]
            if row["year"] == int(str(dataset.version_stamp.get("effective_date", "0"))[:4] or 0)
        ),
        "",
    )
    sections.append(
        {
            "title": "퇴직부금비 · 법 정 부 담 금 · 보험료",
            "formula": "",
            "columns": ["항목", "산식", "요율(%)"],
            "rows": [
                [
                    "퇴직공제부금비",
                    "(직접노무비) × 율",
                    v["rate_retirement_mutual_aid"]["rate_percent"],
                ],
                ["석면분담금", "(노무비) × 율", v["rate_asbestos_contribution"]["rate_percent"]],
                [
                    "임금채권부담금",
                    "(노무비) × 율",
                    v["rate_wage_claim_contribution"]["rate_percent"],
                ],
                ["산재보험료", "(노무비) × 율", v["rate_sanjae"]["rate_percent"]],
                ["건강보험료", "(직접노무비) × 율", v["rate_health"]["rate_percent"]],
                ["장기요양보험료", "(건강보험료) × 율", v["rate_care"]["rate_percent"]],
                ["연금보험료", "(직접노무비) × 율", pension],
                ["부가가치세", "(공급가액) × 율", v["rate_vat"]["rate_percent"]],
            ],
        }
    )
    return sections