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
    
    # Only pallets with dates (filters empty rows)
    conditions = ["pallet_number IS NOT NULL", "pallet_number != ", "date_reserved IS NOT NULL"]
    
    # Junk filter (same as EIM)
    junk = ["", "0", "0000", "N/A", "TBD", "null"]
    conditions.append("pallet_number NOT IN ( + , .join(junk) + )")
    
    if status_filter:
        conditions.append("status = {0}".format(frappe.db.escape(status_filter)))
    if search:
        conditions.append("pallet_number LIKE %{0}%".format(frappe.db.escape(search)))
    
    where_clause = " AND ".join(conditions)
    
    # Get total
    total = frappe.db.sql("""SELECT COUNT(*) FROM tabPallet WHERE {0}""".format(where_clause))[0][0]
    
    # Get pallets - convert pallet_number to unsigned int for numeric sort
    # Use natural sort: convert to int for proper numeric ordering
    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 {0}
        ORDER BY CAST(pallet_number AS UNSIGNED) {1}
        LIMIT {2} OFFSET {3}
    """.format(where_clause, sort_dir, page_size, offset), as_dict=True)
    
    return {
        "pallets": pallets,
        "total": total,
        "page": page,
        "page_size": page_size
    }