import frappe

@frappe.whitelist()
def get_pallets(page=1, page_size=100, sort_field="pallet_number", sort_dir="desc", status_filter="", search=""):
    page = int(page)
    page_size = int(page_size)
    offset = (page - 1) * page_size
    
    conditions = ["pallet_number IS NOT NULL", "pallet_number != ''", "date_reserved IS NOT NULL"]
    
    junk = ["", "0", "0000", "N/A", "TBD", "null", "999990", "999995"]
    junk_list = "', '".join(junk)
    conditions.append("pallet_number NOT IN ('" + junk_list + "')")
    conditions.append("pallet_number NOT LIKE '999%'")
    conditions.append("pallet_number REGEXP '^[0-9]'")
    
    if status_filter:
        conditions.append("status = '" + frappe.db.escape(status_filter) + "'")
    if search:
        conditions.append("pallet_number LIKE '%" + frappe.db.escape(search) + "%'")
    
    where_clause = " AND ".join(conditions)
    
    total = frappe.db.sql("SELECT COUNT(*) FROM tabPallet WHERE " + where_clause)[0][0]
    
    pallets = frappe.db.sql("SELECT name, pallet_number, date_reserved, received_date, customer_number, inbound_weight, tester, description, qty_to_sales, weight_to_sales, finish_date, notes, status FROM tabPallet WHERE " + where_clause + " ORDER BY CAST(pallet_number AS UNSIGNED) " + sort_dir + " LIMIT " + str(page_size) + " OFFSET " + str(offset), as_dict=True)
    
    return {"pallets": pallets, "total": total, "page": page, "page_size": page_size}