#!/bin/bash

process_table_schema() {
  while IFS=$'\t' read -r column_name _ data_type _; do
    # Print the column name and data type
    printf '%s\t%s\n' "$column_name" "$data_type"
  done < "$1"
}

input_file="$1"

# Check if a file is provided as an argument
if [ $# -eq 0 ]; then
  echo "Usage: $0 <filename>"
  exit 1
fi

# Process the provided file and skip the first row
first_line=true
process_table_schema "$input_file" | while IFS=$'\t' read -r column_name data_type; do
  if [ "$first_line" = true ]; then
    first_line=false
    continue
  fi
  case "$data_type" in
    "timestamp")
      sqlalchemy_type="DateTime"
      ;;
    "int" | "integer" | "int4")
      sqlalchemy_type="Integer"
      ;;
    "varchar"* | "text")
      sqlalchemy_type="String" # handles types like varchar(256)
      ;;
    "boolean" | "bool")
      sqlalchemy_type="Boolean"
      ;;
    "float" | "float8")
      sqlalchemy_type="Float"
      ;;
    "serial4")
      sqlalchemy_type="Integer"
      ;;
    "numeric"*)
      sqlalchemy_type="Numeric" # handles types like numeric(12, 2)
      ;;
    *)
      sqlalchemy_type="UNDEFINED_CHANGE_ME" # default to UNDEFINED_CHANGE_ME if data type is unrecognized
      ;;
  esac
  echo "$column_name = Column($sqlalchemy_type)"
done