#!/bin/bash
PSQL="psql --username=freecodecamp --dbname=salon -t --no-align -c"

SELECT_SERVICE() {

  if [[ $1 ]]; then
    echo -e "\n$1"
  fi

  SERVICES=$($PSQL "SELECT * FROM services")
  echo "$SERVICES" | while IFS="|" read SERVICE_ID SERVICE_NAME; do
    echo "$SERVICE_ID) $SERVICE_NAME"
  done
  read SERVICE_ID_SELECTED
  
  if [[ ! $SERVICE_ID_SELECTED =~ ^[0-9]+$ ]]; then
    SELECT_SERVICE "Please use a valid number"
  fi

  SERVICE=$($PSQL "SELECT service_id, name FROM services WHERE service_id = $SERVICE_ID_SELECTED")

  echo $SERVICE

  SERVICE_ID=$(echo "$SERVICE" | cut -d '|' -f1)
  SERVICE_NAME=$(echo "$SERVICE" | cut -d '|' -f2)

  if [[ -z $SERVICE_ID ]]; then
    SELECT_SERVICE "This is not a valid service"
  fi

}

NEW_CUSTOMER() {

  echo -e "\nWhat's your name?"
  read CUSTOMER_NAME
  CUSTOMER_INSERT=$($PSQL "INSERT INTO CUSTOMERS(phone, name) VALUES('$1','$CUSTOMER_NAME')")
  CUSTOMER_ID=$($PSQL "SELECT customer_id FROM customers WHERE phone = '$CUSTOMER_PHONE'")
}

GET_CUSTOMER() {

  echo -e "\nWhat's your phone number?"
  read CUSTOMER_PHONE

  CUSTOMER_RESULT=$($PSQL "SELECT customer_id, name FROM customers WHERE phone = '$CUSTOMER_PHONE'")

  if [[ -z $CUSTOMER_RESULT ]]; then
    NEW_CUSTOMER $CUSTOMER_PHONE
  else
    echo $CUSTOMER_RESULT | IFS="|" read CUSTOMER_ID BAR CUSTOMER_NAME
  fi

}

SET_APPOINTMENT() {

  echo -e "\nAt what time would you like to schedule your appointment?"
  read SERVICE_TIME

  CREATE_APPOINTMENT=$($PSQL "INSERT INTO appointments(customer_id, service_id, time) VALUES($CUSTOMER_ID,$SERVICE_ID,'$SERVICE_TIME')")
}

echo -e "\n~~~~~ Kapsalon kanker lekker ~~~~~\n"

SELECT_SERVICE
GET_CUSTOMER
SET_APPOINTMENT

echo -e "\nI have put you down for a $SERVICE_NAME at $SERVICE_TIME, $CUSTOMER_NAME."