"""Render extracted supplier-offer data into the Excel form the CFO defined:

    Supplier header (Jméno, DIČ/IČO, kontaktní email, adresa)
    then a table:
    Název zboží | ID zboží dodavatele | Množství | Jednotka | Jednotková cena | Cena celkem
"""
from openpyxl import Workbook
from openpyxl.styles import Alignment, Border, Font, PatternFill, Side
from openpyxl.utils import get_column_letter

HEADER_FILL = PatternFill("solid", fgColor="2563EB")
HEADER_FONT = Font(bold=True, color="FFFFFF", size=11)
LABEL_FONT = Font(bold=True, size=10)
THIN = Side(style="thin", color="D0D5DC")
BORDER = Border(left=THIN, right=THIN, top=THIN, bottom=THIN)

COLUMNS = [
    ("Název zboží", "name", 46),
    ("ID zboží dodavatele", "supplier_id", 20),
    ("Množství", "quantity", 12),
    ("Jednotka", "unit", 12),
    ("Jednotková cena", "unit_price", 16),
    ("Cena celkem", "total_price", 16),
]


def write_offer_xlsx(data: dict, out_path: str) -> None:
    wb = Workbook()
    ws = wb.active
    ws.title = "Nabídka"

    sup = data.get("supplier") or {}
    ico_dic = " / ".join(x for x in (sup.get("ico"), sup.get("dic")) if x) or ""

    # ── Supplier header block ──
    ws.cell(row=1, column=1, value="Dodavatel").font = Font(bold=True, size=13)
    header_pairs = [
        ("Jméno", sup.get("name")),
        ("DIČ / IČO", ico_dic),
        ("Kontaktní email", sup.get("email")),
        ("Adresa", sup.get("address")),
    ]
    row = 2
    for label, val in header_pairs:
        ws.cell(row=row, column=1, value=label).font = LABEL_FONT
        ws.cell(row=row, column=2, value=val if val is not None else "")
        row += 1

    row += 1  # spacer

    # ── Line-items table ──
    for c, (title, _key, _w) in enumerate(COLUMNS, 1):
        cell = ws.cell(row=row, column=c, value=title)
        cell.font = HEADER_FONT
        cell.fill = HEADER_FILL
        cell.alignment = Alignment(horizontal="center", wrap_text=True)
        cell.border = BORDER
    row += 1

    for item in data.get("line_items") or []:
        for c, (_title, key, _w) in enumerate(COLUMNS, 1):
            v = item.get(key)
            cell = ws.cell(row=row, column=c, value=v if v is not None else "")
            cell.border = BORDER
            if key in ("unit_price", "total_price") and isinstance(v, (int, float)):
                cell.number_format = "#,##0.00"
            elif key == "quantity" and isinstance(v, (int, float)):
                # Whole numbers get a pure integer format with NO decimal
                # section — some viewers render the decimal separator even
                # when "0.###" has no fractional digits, leaving a stray
                # comma. Only show decimals when the value actually has them.
                cell.number_format = "0" if float(v).is_integer() else "0.###"
            cell.alignment = Alignment(
                horizontal="left" if key in ("name", "supplier_id", "unit")
                else "right",
                vertical="top", wrap_text=(key == "name"))
        row += 1

    for c, (_title, _key, w) in enumerate(COLUMNS, 1):
        ws.column_dimensions[get_column_letter(c)].width = w

    ws.freeze_panes = ws.cell(row=7, column=1)  # keep header + table head visible
    wb.save(out_path)