"""인쇄 미리보기 표 출력 길(PLAN 302-1 · 초안) — 서버는 꼴만 바꿈(값 셈 · 저장 없음 · 정본 아님).

    POST /api/projects/{id}/print/table-pdf    {title, sheets:[{name, orientation, html}]}
        html = 브라우저가 `renderDataTableHtml` 로 만든 표(화면과 같은 꼴) → 인쇄 CSS 를 입혀
        헤드리스 Edge(없으면 Chrome)로 A4 PDF 한 벌 · 시트 = 차례대로 새 쪽 · 방향 = 시트마다 ·
        쪽 머리 = 시트 이름(표 머리와 함께 쪽마다 되풀이) · 쪽 바닥 = 쪽 번호 ·
        넓은 표 = 쪽 폭에 맞춰 줄임
    POST /api/projects/{id}/print/table-xlsx   {title, sheets:[{name, grid}]}
        grid(`B09_Draft_Print_Table.sheetGrid`) → 엑셀 — 시트 = 차례대로 · 이름 31자 ·
        금지 글자 바꿈 · 머리 굵게 · 병합 · 테두리 · 숫자 = 숫자 칸(열 소수 서식) ·
        레벨 = 들여쓰기 · 열 폭 · 인쇄 = 시트 방향 · A4 · 폭 1쪽 · 머리 줄 반복

`B09_Estimation_Router` 가 draft/*_Router.py 의 router 를 끼워 넣음
(같은 머리 · 같은 권한 = 회사 · 프로젝트).
PDF 는 자식 파이썬 프로세스(이 파일을 스크립트로 · 입력 JSON stdin · 결과 JSON 한 줄) —
서버 안 스레드에선 Playwright 가 드라이버를 못 띄움(`B08_Quantity_Milestone_Capture` 와 같은 까닭).
헤드리스 쪽은 스크립트 끔 · 바깥 요청 모두 막음(그림 = data: 주소만).
"""

from __future__ import annotations

import html as htmlmod
import io
import json
import re
import subprocess
import sys
import tempfile
import threading
from pathlib import Path
from typing import Any, Literal

TIMEOUT_S = 90
CHANNELS = ("msedge", "chrome")  # 시스템 브라우저 — 번들 chromium 은 안 받아 둠
NO_BROWSER = "서버에서 브라우저(Edge · Chrome)를 못 띄움"
#: A4 인쇄 칸 폭(px · 96dpi) — 210 · 297mm − 좌우 여백 10mm 둘
PRINT_W = {"portrait": 190 / 25.4 * 96, "landscape": 277 / 25.4 * 96}
MIN_ZOOM = 0.3

PRINT_CSS = """
@page { size: A4 portrait; margin: 10mm 10mm 14mm; }
@page wide { size: A4 landscape; margin: 10mm 10mm 14mm; }
html, body { margin: 0; }
body { font-family: "Malgun Gothic", "맑은 고딕", sans-serif; font-size: 11px; color: #000; }
.sheet { break-after: page; }
.sheet:last-child { break-after: auto; }
.sheet.is-landscape { page: wide; }
.ui-data-table__table {
  width: var(--dt-w); table-layout: fixed; border-collapse: collapse; line-height: 1.3;
}
.ui-data-table__table caption { display: none; }
.ui-data-table__table th, .ui-data-table__table td {
  height: 20px; padding: 0 4px; overflow: hidden; border: 0.5pt solid #666;
  white-space: nowrap; white-space-collapse: preserve-spaces; text-overflow: clip;
}
.ui-data-table__table [data-num] { text-align: right; font-variant-numeric: tabular-nums; }
.ui-data-table__table td.is-empty { text-align: center; color: #555; }
.ui-data-table__table thead { display: table-header-group; }
.ui-data-table__table thead th { background: #eee; font-weight: 600; text-align: center; }
.ui-data-table__table thead th.sheet-title {
  background: #fff; border: 0; text-align: left; font-size: 13px; font-weight: 700; height: 26px;
}
.ui-data-table__table tfoot { display: table-row-group; }
.ui-data-table__table tfoot td { background: #f3f3f3; font-weight: 700; }
.ui-data-table__table tbody tr.is-title td { font-weight: 700; }
.ui-data-table__table td.is-merged { vertical-align: middle; }
.ui-data-table__table tr { break-inside: avoid; }
.ui-data-table__table td.ui-data-table__lv {
  text-align: left; padding-left: calc(4px + var(--dt-lv, 0) * 1em);
}
.ui-data-table__table td.ui-data-table__lv.is-node { font-weight: 700; }
.ui-data-table__guide, .ui-data-table__icon { display: none; }
.sheet-figure { margin: 8px 0 0; break-inside: avoid; }
.sheet-figure img { max-width: 100%; max-height: 240mm; }
.sheet-figure figcaption { font-size: 11px; margin-top: 2px; }
"""
FOOTER = (
    '<div style="width:100%;font-size:9px;text-align:center;font-family:sans-serif">'
    '<span class="pageNumber"></span> / <span class="totalPages"></span></div>'
)

_lock = threading.Lock()  # ponytail: 서버 전체 한 줄 — 브라우저 한 번에 하나


class PrintError(Exception):
    """까닭 한 줄(예외 원문 없음)."""


def _titled(table: str, name: str) -> str:
    """표 머리 맨 위에 시트 이름 줄 — thead 가 쪽마다 되풀이되므로 쪽 머리가 됨."""
    span = max(1, table.count("<col "))
    row = f'<tr><th class="sheet-title" colspan="{span}">{htmlmod.escape(name)}</th></tr>'
    return table.replace("<thead>", f"<thead>{row}", 1) if "<thead>" in table else table


def document_html(title: str, sheets: list[dict[str, Any]]) -> str:
    """시트마다 한 덩이(새 쪽 · 방향) — 표 머리에 시트 이름."""
    parts = [
        f'<section class="sheet is-{s.get("orientation") or "portrait"}">'
        f"{_titled(s['html'], s['name'])}</section>"
        for s in sheets
    ]
    return (
        f'<!doctype html><html><head><meta charset="utf-8"><title>{htmlmod.escape(title)}</title>'
        f"<style>{PRINT_CSS}</style></head><body>{''.join(parts)}</body></html>"
    )


#: 시트 덩이마다 쪽 폭에 맞춰 줄임(zoom · 넓은 표만)
FIT_JS = (
    """(w) => { for (const s of document.querySelectorAll('.sheet')) {
  const width = s.scrollWidth, max = w[s.classList.contains('is-landscape') ? 1 : 0];
  if (width > max) s.style.zoom = String(Math.max(%s, max / width)); } }"""
    % MIN_ZOOM
)


def render_pdf(doc: str) -> bytes:
    """헤드리스 브라우저 → PDF 바이트. 실패 = PrintError."""
    try:
        from playwright.sync_api import Error as PwError
        from playwright.sync_api import sync_playwright
    except ImportError as error:
        raise PrintError("서버에 Playwright 가 없습니다(pip install playwright)") from error
    try:
        with sync_playwright() as p:
            browser = None
            for channel in CHANNELS:
                try:
                    browser = p.chromium.launch(channel=channel, headless=True)
                    break
                except PwError:
                    continue
            if browser is None:
                raise PrintError(NO_BROWSER)
            try:
                context = browser.new_context(java_script_enabled=False)
                context.route("**/*", lambda route: route.abort())  # 바깥 요청 없음(data: 만)
                page = context.new_page()
                page.set_content(doc, wait_until="load")
                page.evaluate(FIT_JS, [PRINT_W["portrait"], PRINT_W["landscape"]])
                return page.pdf(
                    prefer_css_page_size=True,
                    print_background=True,
                    display_header_footer=True,
                    header_template="<span></span>",
                    footer_template=FOOTER,
                )
            finally:
                browser.close()
    except PrintError:
        raise
    except Exception as error:  # 드라이버 못 뜸 등 — 예외 글은 내지 않음
        raise PrintError(NO_BROWSER) from error


def spawn_pdf(doc: str) -> bytes:
    """자식 파이썬 프로세스로 render_pdf — 결과 PDF 는 임시 파일로 받음."""
    with _lock, tempfile.TemporaryDirectory() as tmp:
        out = Path(tmp) / "out.pdf"
        try:
            done = subprocess.run(
                [sys.executable, __file__],
                input=json.dumps({"doc": doc, "out": str(out)}).encode(),
                capture_output=True,
                timeout=TIMEOUT_S,
            )
        except subprocess.TimeoutExpired as error:
            raise PrintError(f"PDF 만들기가 {TIMEOUT_S}초 안에 안 끝남") from error
        except OSError as error:
            raise PrintError(NO_BROWSER) from error
        try:
            result = json.loads(done.stdout.decode().strip().splitlines()[-1])
        except (ValueError, IndexError):  # 자식이 죽음 — stderr(예외 글)는 내지 않음
            result = {"reason": NO_BROWSER}
        if result.get("reason"):
            raise PrintError(result["reason"])
        return out.read_bytes()


# ── 엑셀 ──────────────────────────────────────────────────────────────────

BAD_TITLE = re.compile(r"[\[\]:*?/\\]")


def sheet_title(name: str, used: set[str]) -> str:
    """엑셀 시트 이름 — 금지 글자 = 「_」 · 31자 · 같은 이름 = 뒤에 (2)…"""
    base = BAD_TITLE.sub("_", name).strip().strip("'") or "시트"
    title, n = base[:31], 1
    while title.lower() in used:
        n += 1
        tail = f" ({n})"
        title = base[: 31 - len(tail)] + tail
    used.add(title.lower())
    return title


def number_format(decimals: int | None) -> str:
    return "#,##0" + ("." + "0" * decimals if decimals else "")


def print_setup(ws: Any, orientation: str, head_rows: int) -> None:
    """인쇄 설정(302-5) — PDF 와 같은 방향 · A4 · 폭 1쪽 맞춤 · 머리 줄 쪽마다 · 여백 ≈ PDF."""
    from openpyxl.worksheet.page import PageMargins

    ws.page_setup.orientation = orientation
    ws.page_setup.paperSize = ws.PAPERSIZE_A4
    ws.page_setup.fitToWidth = 1
    ws.page_setup.fitToHeight = 0
    ws.sheet_properties.pageSetUpPr.fitToPage = True
    ws.page_margins = PageMargins(left=0.4, right=0.4, top=0.4, bottom=0.55, header=0.2, footer=0.2)
    if head_rows:
        ws.print_title_rows = f"1:{head_rows}"
    ws.oddHeader.left.text = "&A"  # 시트 이름
    ws.oddFooter.center.text = "&P / &N"  # 쪽 번호


def build_xlsx(sheets: list[dict[str, Any]]) -> bytes:
    """grid 시트들 → 엑셀 바이트(차례 그대로)."""
    from openpyxl import Workbook
    from openpyxl.styles import Alignment, Border, Font, PatternFill, Side
    from openpyxl.utils import get_column_letter

    thin = Side(style="thin", color="666666")
    box = Border(left=thin, right=thin, top=thin, bottom=thin)
    head_fill = PatternFill("solid", fgColor="EEEEEE")
    wb = Workbook()
    wb.remove(wb.active)
    used: set[str] = set()
    for sheet in sheets:
        ws = wb.create_sheet(sheet_title(sheet["name"], used))
        g = sheet["grid"]
        cols, top = g["cols"], g["head_rows"]
        for j, col in enumerate(cols, 1):
            ws.column_dimensions[get_column_letter(j)].width = max(4, round(col["w"] / 7, 1))
        for r in range(1, top + 1):
            for j in range(1, len(cols) + 1):
                cell = ws.cell(r, j)
                cell.font, cell.fill, cell.border = Font(bold=True), head_fill, box
                cell.alignment = Alignment(horizontal="center", vertical="center", wrap_text=True)
        for h in g["head"]:
            ws.cell(h["r"] + 1, h["c"] + 1, h["text"])
            if h["rs"] > 1 or h["cs"] > 1:
                ws.merge_cells(
                    start_row=h["r"] + 1,
                    start_column=h["c"] + 1,
                    end_row=h["r"] + h["rs"],
                    end_column=h["c"] + h["cs"],
                )
        lv_col = g.get("level_col")
        for i, row in enumerate(g["rows"]):
            r = top + 1 + i
            bold = bool(g["bold"][i]) if i < len(g["bold"]) else False
            level = g["levels"][i] if i < len(g["levels"]) else None
            for j, value in enumerate(row):
                cell = ws.cell(r, j + 1, value)
                cell.border = box
                if bold:
                    cell.font = Font(bold=True)
                if isinstance(value, (int, float)) and not isinstance(value, bool):
                    cell.number_format = number_format(cols[j].get("dec"))
                if j == lv_col and level:
                    cell.alignment = Alignment(indent=max(0, int(level) - 1))
        for m in g.get("merges", []):
            ws.merge_cells(
                start_row=top + 1 + m["r"],
                start_column=m["c"] + 1,
                end_row=top + m["r"] + m["rs"],
                end_column=m["c"] + 1,
            )
            ws.cell(top + 1 + m["r"], m["c"] + 1).alignment = Alignment(vertical="center")
        if top:
            ws.freeze_panes = ws.cell(top + 1, (g.get("frozen") or 0) + 1)
        print_setup(ws, sheet.get("orientation") or "portrait", top)
    out = io.BytesIO()
    wb.save(out)
    return out.getvalue()


if __name__ == "__main__":  # 자식 프로세스 몸통 — fastapi 를 읽지 않음
    job = json.loads(sys.stdin.buffer.read())
    try:
        Path(job["out"]).write_bytes(render_pdf(job["doc"]))
        print(json.dumps({"reason": None}))
    except PrintError as error:
        print(json.dumps({"reason": str(error)}, ensure_ascii=False))
    sys.exit(0)


# ── 길 ────────────────────────────────────────────────────────────────────

import asyncio  # noqa: E402
from urllib.parse import quote  # noqa: E402
from uuid import UUID  # noqa: E402

from fastapi import APIRouter, HTTPException  # noqa: E402
from fastapi.responses import Response  # noqa: E402
from pydantic import BaseModel, Field  # noqa: E402

router = APIRouter()
MAX_SHEETS = 200


class PdfSheet(BaseModel):
    name: str = Field(max_length=200)
    orientation: Literal["portrait", "landscape"] = "portrait"
    html: str


class XlsxSheet(BaseModel):
    name: str = Field(max_length=200)
    orientation: Literal["portrait", "landscape"] = "portrait"
    grid: dict[str, Any]


class PdfBody(BaseModel):
    title: str = Field(default="인쇄", max_length=200)
    sheets: list[PdfSheet] = Field(min_length=1, max_length=MAX_SHEETS)


class XlsxBody(BaseModel):
    title: str = Field(default="인쇄", max_length=200)
    sheets: list[XlsxSheet] = Field(min_length=1, max_length=MAX_SHEETS)


def _file(data: bytes, media: str, title: str, ext: str) -> Response:
    name = quote(f"{title}.{ext}")
    return Response(
        content=data,
        media_type=media,
        headers={"Content-Disposition": f"attachment; filename*=UTF-8''{name}"},
    )


@router.post("/{project_id}/print/table-pdf")
async def table_pdf(project_id: UUID, body: PdfBody) -> Response:
    doc = document_html(body.title, [s.model_dump() for s in body.sheets])
    try:
        data = await asyncio.to_thread(spawn_pdf, doc)
    except PrintError as error:
        raise HTTPException(status_code=503, detail=str(error)) from error
    return _file(data, "application/pdf", body.title, "pdf")


@router.post("/{project_id}/print/table-xlsx")
async def table_xlsx(project_id: UUID, body: XlsxBody) -> Response:
    try:
        data = await asyncio.to_thread(build_xlsx, [s.model_dump() for s in body.sheets])
    except (KeyError, TypeError, ValueError, IndexError) as error:
        raise HTTPException(status_code=400, detail=f"표 꼴이 맞지 않음 — {error}") from error
    media = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
    return _file(data, media, body.title, "xlsx")