import pandas as pd
from datetime import date
from openpyxl import load_workbook
from openpyxl.styles import Font, PatternFill, Alignment, Border, Side
from openpyxl.utils import get_column_letter

SOURCE_FILE = "accountability_combined.xlsx"
OUTPUT_FILE = "sheet_expired.xlsx"

DATE_COLUMNS = {
    "Orig Exp Date", "Exp Date", "Rcv Date",
    "Date Asgn", "Disp Date", "Date Ret", "Destroyed",
}

COLUMN_WIDTHS = {
    "Site":          14,
    "Med ID":        10,
    "Lot No.":       12,
    "Orig Exp Date": 16,
    "Exp Date":      14,
    "Rcv Date":      14,
    "Rcpt User":     22,
    "Subject ID":    14,
    "Qty Asgn":       9,
    "IRT Tx":         8,
    "Date Asgn":     14,
    "Asgn User":     20,
    "Disp Status":   16,
    "Disp Date":     14,
    "Qty Disp":       9,
    "Disp User":     20,
    "Qty Ret":       10,
    "Date Ret":      14,
    "Ret User":      18,
    "Destroyed":     14,
    "Basket No.":    12,
}

today = date.today()
sheet_name = f"Expired as of {today.strftime('%d-%b-%Y')}"

# Load source
df = pd.read_excel(SOURCE_FILE)

# Convert date columns
for col in DATE_COLUMNS:
    if col in df.columns:
        df[col] = pd.to_datetime(df[col], errors="coerce")

# Filter: not in basket AND not assigned to patient AND Exp Date < today
mask = df["Basket No."].isna() & df["Subject ID"].isna() & (df["Exp Date"] < pd.Timestamp(today))
filtered = df[mask].copy().reset_index(drop=True)

print(f"Expired kits not in basket: {len(filtered)}")

filtered.to_excel(OUTPUT_FILE, index=False, sheet_name=sheet_name)

# Formatting
wb = load_workbook(OUTPUT_FILE)
ws = wb[sheet_name]

header_fill = PatternFill("solid", start_color="C00000")   # dark red
header_font = Font(bold=True, color="FFFFFF", name="Arial", size=10)
row_font    = Font(name="Arial", size=10)
exp_fill    = PatternFill("solid", start_color="FFE0E0")   # light red highlight for Exp Date

thin   = Side(style="thin", color="000000")
border = Border(left=thin, right=thin, top=thin, bottom=thin)

headers = [cell.value for cell in ws[1]]

for cell in ws[1]:
    cell.fill      = header_fill
    cell.font      = header_font
    cell.alignment = Alignment(horizontal="center", vertical="center", wrap_text=False)
    cell.border    = border

for row in ws.iter_rows(min_row=2, max_row=ws.max_row):
    for cell in row:
        col_name = headers[cell.column - 1] if cell.column <= len(headers) else None
        cell.font      = row_font
        cell.border    = border
        cell.alignment = Alignment(horizontal="center")
        if col_name in DATE_COLUMNS:
            cell.number_format = "DD-MMM-YYYY"
        if col_name == "Exp Date":
            cell.fill = exp_fill

for cell in ws[1]:
    width = COLUMN_WIDTHS.get(cell.value, 14)
    ws.column_dimensions[get_column_letter(cell.column)].width = width

ws.auto_filter.ref = ws.dimensions
ws.freeze_panes    = "A2"

wb.save(OUTPUT_FILE)
print(f"Saved: {OUTPUT_FILE}  (sheet: '{sheet_name}')")