import click
import pandas as pd
from datetime import datetime
from flask.cli import with_appcontext
from app.extensions import db
from app.models import RawTransaction

@click.group()
def commands():
    """Management commands for the salary analytics application."""
    pass

@commands.command('upload-xls')
@click.argument('xls_path')
@with_appcontext
def upload_xls_cli(xls_path):
    """Uploads data from an XLS file to the analytics_raw_transactions table.

    Args:
        xls_path (str): The path to the XLS file.
    """
    print(f"Attempting to upload data from {xls_path}...")
    try:
        df = pd.read_excel(xls_path, dtype=str)

        # Convert date columns to datetime
        date_cols = ["ENTRY_DATE", "VALUE_DATE", "PSTD_DATE", "TRAN_DATE"]
        for col in date_cols:
            if col in df.columns:
                df[col] = pd.to_datetime(df[col], errors='coerce')
                df[col] = df[col].fillna(pd.Timestamp.now())

        # Convert numeric columns
        for col in ["TRAN_AMT", "BALANCE"]:
            if col in df.columns:
                df[col] = pd.to_numeric(df[col].str.replace(",", ""), errors='coerce')

        # Truncate TRAN_PARTICULAR to 100 chars
        if "TRAN_PARTICULAR" in df.columns:
            df["TRAN_PARTICULAR"] = df["TRAN_PARTICULAR"].astype(str).str.slice(0, 100)

        # Prepare data for insertion into the database
        records = []
        for index, row in df.iterrows():
            record = RawTransaction(
                cust_id=row.get('CUST_ID'),
                accountid=row.get('ACCOUNTID'),
                tran_id=row.get('TRAN_ID'),
                entry_date=row.get('ENTRY_DATE'),
                value_date=row.get('VALUE_DATE'),
                pstd_date=row.get('PSTD_DATE'),
                tran_date=row.get('TRAN_DATE'),
                tran_sub_ty=row.get('TRAN_SUB_TY'),
                part_tran_ty=row.get('PART_TRAN_TY'),
                channel=row.get('CHANNEL'),
                tran_amt=row.get('TRAN_AMT'),
                balance=row.get('BALANCE'),
                isreverse=row.get('ISREVERSE'),
                reverse=row.get('REVERSE'),
                tran_particular=(row.get('TRAN_PARTICULAR') or '')[:100]
            )
            records.append(record)

        db.session.add_all(records)
        db.session.commit()
        print(f"Successfully uploaded {len(records)} records to analytics_raw_transactions")

    except Exception as e:
        db.session.rollback()
        print(f"Error uploading data: {str(e)}")