import re
import itertools

geo_admin_keywords = [
    'lat', 'lon', 'long', 'latitude', 'longitude', 'koordinat', 'geometry', 'geometri',
    'desa', 'kelurahan', 'kel', 'kecamatan', 'kabupaten', 'kab', 'kota', 'provinsi',
    'lokasi', 'region', 'area', 'zone', 'boundary', 'batas'
]

def normalize_text(text):
    text = text.lower()
    text = re.sub(r'[^a-z0-9/ ]+', ' ', text)
    text = re.sub(r'\s+', ' ', text).strip()
    return text

def generate_combined_patterns(keywords):
    combos = list(itertools.combinations(keywords, 2))
    patterns = []
    for a, b in combos:
        patterns.append(rf'{a}\s*/\s*{b}')
        patterns.append(rf'{b}\s*/\s*{a}')
    return patterns

combined_patterns = generate_combined_patterns(geo_admin_keywords)

def contains_geo_admin_keywords(text):
    text_clean = normalize_text(text)
    if len(text_clean) < 3:
        return False 
    
    for pattern in combined_patterns:
        if re.search(pattern, text_clean):
            return True

    for kw in geo_admin_keywords:
        if re.search(rf'(^|[\s/_-]){kw}([\s/_-]|$)', text_clean):
            return True
    
    return False

def filter_geo_admin_column(tables):
    filtered = []
    for table in tables:
        found = any(contains_geo_admin_keywords(col) for col in table['columns'])
        if found:
            filtered.append(table)
    return filtered


NUMBER_HEADER_KEYWORDS = [
    "no","no.","nomor","nomor urut","no urut","No","Nomor","No Urut","Index",
    "ID","Sr No","S/N","SN","Sl No"
]

def has_number_header(header):
    header_text = header
    return any(keyword in header_text for keyword in NUMBER_HEADER_KEYWORDS)

def is_numbering_column(col_values):
    numeric_like = 0
    total = 0
    for v in col_values:
        if not v or not isinstance(v, str):
            continue
        total += 1
        if re.fullmatch(r"0*\d{1,3}", v.strip()):
            numeric_like += 1
    return total > 0 and (numeric_like / total) > 0.6

def is_numeric_value(v):
    if v is None:
        return False
    if isinstance(v, (int, float)):
        return True
    if isinstance(v, str) and re.fullmatch(r"0*\d{1,3}", v.strip()):
        return True
    return False

def cleaning_column(headers, bodies):
    cleaned_bodies = []

    for header, body in zip(headers, bodies):
        if not body:
            cleaned_bodies.append(body)
            continue

        header_has_number = has_number_header(header)
        first_col = [row[0] for row in body if row and len(row) > 0]
        first_col_is_numbering = is_numbering_column(first_col)

        if not header_has_number and first_col_is_numbering:
            new_body = []
            for row in body:
                if not row:
                    continue
                first_val = row[0]
                if is_numeric_value(first_val) and len(row) > 1:
                    new_body.append(row[1:])
                else:
                    new_body.append(row)
            body = new_body

        header_len = len(headers)
        filtered_body = [row for row in body if len(row) == header_len]

        cleaned_bodies.append(filtered_body)

    return cleaned_bodies

def parse_page_selection(selectedPage: str, total_pages: int):
    if not selectedPage:
        return list(range(1, total_pages + 1))

    pages = set()
    parts = re.split(r'[,\s]+', selectedPage.strip())

    for part in parts:
        if '-' in part:
            try:
                start, end = map(int, part.split('-'))
                pages.update(range(start, end + 1))
            except ValueError:
                continue
        else:
            try:
                pages.add(int(part))
            except ValueError:
                continue

    valid_pages = [p for p in sorted(pages) if 1 <= p <= total_pages]
    return valid_pages

def is_number(s):
    if s is None:
        return False
    s = str(s).strip().replace(',', '').replace('.', '')
    return s.isdigit()

def row_ratio(row):
    non_empty = [c for c in row if c not in (None, '', ' ')]
    if not non_empty:
        return 0
    num_count = sum(is_number(c) for c in non_empty)
    return num_count / len(non_empty)

def has_mixed_text_and_numbers(row):
    non_empty = [c for c in row if c not in (None, '', ' ')]
    has_text = any(isinstance(c, str) and re.search(r'[A-Za-z]', str(c)) for c in non_empty)
    has_num = any(is_number(c) for c in non_empty)
    return has_text and has_num

def is_short_text_row(row):
    """Deteksi baris teks pendek (1-2 kolom teks pendek)."""
    non_empty = [str(c).strip() for c in row if c not in (None, '', ' ')]
    if not non_empty:
        return False
    text_only = all(not is_number(c) for c in non_empty)
    joined = " ".join(non_empty)
    return text_only and len(non_empty) <= 2 and len(joined) < 20