#!/usr/bin/env sh

if [ -f $HOME/git/knd-ddbank/ddbank_config ]; then {
. $HOME/git/knd-ddbank/ddbank_config
} else {
    echo "Configuration file not present."
    echo "Refer to the Git README for setup"
    echo ""
    echo "https://git.skyfall.tech/theissenm/knd-ddbank/src/branch/master"
    echo ""
    exit 1
} fi

db_conn="psql -h $dbhost -p $dbport -U $dbuser -d $datab -c"

# Functions
new_account() {
    clear
    read -p "Enter the name of your account: " user1
    echo ""
    echo "-----------------------------------"
    echo "Your account name will be $user1."
    echo "-----------------------------------"
    echo ""
    read -n1 -p "Is that correct? [y/N]  " yn

    case $yn in

        # If user selects yes. Insert their username and a timestamp into the database.
        [Yy] ) echo "" 
        $db_conn "insert into account (username,timestamp,active) values ('$user1','now','t');"
        
        # Sets the user's id as the variable.
        user1_id=$($db_conn "select id from account where username='$user1';" | awk 'FNR == 3 {print}')
        
        # Gives the user the starting balance.
        $db_conn "insert into balance (id,balance) values ('$user1_id',$bal);"
        
        echo "" 
        echo "-----------------------------------"
        echo "Account name: $user1"
        echo "Account ID: $user1_id"
        echo "-----------------------------------"
        echo ""
        
        # Transactioning
        $db_conn "insert into transaction (id,username,amount,timestamp) values ('$user1_id','$user1','+$bal','now');"
        ;;
        
        # If the user selects anything other than [Yy]
        * ) echo "Aborted"
        ;;

    esac
}

list_user() {
    echo ""
    $db_conn "select id,username,timestamp from account where active ='t';"
    echo ""
}

list_balance() {
    # Bal Menu
    clear
    while true 
    do
        echo ""
        echo "1) List all users balances."
        echo "2) Exact User Search"
        echo "3) User Search" 
        echo ""
        echo "q) Go back."
        echo ""
        read -n1 -p "*Balance Menu: Select from the above: " ii
        echo ""

        case $ii in
            1 ) clear
                $db_conn "select id,username,balance from account join balance using (id) where active = 't';" ;;
            2 ) read -p "Enter the user account name: " ex_mat
                $db_conn "select id,username,balance from account join balance using (id) where username='$ex_mat' and active = 't';" ;;
            3 ) read -p "Enter search term: " bal_user
                    bal_user1=$($db_conn "select id,username,balance from account join balance using (id) where active = 't';")
                    echo "$bal_user1" | awk 'FNR == 1 {print}'
                    echo "$bal_user1" | grep -iE "$bal_user"     
                    echo "" ;;
            [0q] ) break ;;
        esac
    done
}

bank_menu() {
clear
while true
do
    echo ""
    echo "1) Withdraw"
    echo "2) Deposit"
    echo "3) Transfer"
    echo "4) Quick balance check"
    echo ""
    echo "q) Go Back"
    echo ""
    read -n1 -p "*Banking Menu: Select from the above: " ii_bank
    echo ""

    case $ii_bank in
        [0q] ) break ;;
        1 ) read -p "Withdraw from user: " with_user 
            read -p "Amount to withdraw: " with_amt
            LAST_USER=$with_user
            ## Not sure why this was here...
            #echo "$with_user" | awk 'FNR == 1 {print}' 

            # Grabs the current amount the user has stored in the database.
            with_1_amt=$($db_conn "select id,username,balance from account join balance using (id) where username='$with_user';"| awk 'FNR == 3' | awk -F\| '{print $3}')
            
            # This grabs the user's ID to use on the balance table.
            with_user_id=$($db_conn "select id,username,balance from account join balance using (id) where username='$with_user';" | awk 'FNR == 3' | awk -F\| '{print $1}')
            # Updates the database with the new amount.
            $db_conn "update balance set balance = balance - '$with_amt' where id = '$with_user_id';" 
            # Transactioning
            $db_conn "insert into transaction (id,username,amount,timestamp) values ('$with_user_id','$with_user','-$with_amt','now');" ;;
        2 ) read -p "Deposit to user: " depo_user
            read -p "Amount to deposit: " depo_amt 
            LAST_USER=$depo_user
            depo_1_amt=$($db_conn "select id,username,balance from account join balance using (id) where username='$depo_user';"| awk 'FNR == 3' | awk -F\| '{print $3}')
            # This grabs the user's ID to use on the balance table.
            depo_user_id=$($db_conn "select id,username,balance from account join balance using (id) where username='$depo_user';" | awk 'FNR == 3' | awk -F\| '{print $1}')
            # Updates the database with the new amount.
            $db_conn "update balance set balance = balance + '$depo_amt' where id = '$depo_user_id';" 
            # Transactioning
            $db_conn "insert into transaction (id,username,amount,timestamp) values ('$depo_user_id','$depo_user','+$depo_amt','now');" ;;
        3 ) read -p "Transfer from user: " tran_user1
            read -p "Transer to user: " tran_user2
            read -p "Amount to transfer: " tran_amt
            # Grabs user IDs.
            tran_user1_id=$($db_conn "select id,username,balance from account join balance using (id) where username='$tran_user1';" | awk 'FNR == 3' | awk -F\| '{print $1}')
            tran_user2_id=$($db_conn "select id,username,balance from account join balance using (id) where username='$tran_user2';" | awk 'FNR == 3' | awk -F\| '{print $1}')
            # Updates the database with the new amounts.
            $db_conn "update balance set balance = balance - '$tran_amt' where id = '$tran_user1_id';"
            $db_conn "update balance set balance = balance + '$tran_amt' where id = '$tran_user2_id';"
            # Transactioning
            $db_conn "insert into transaction (id,username,amount,timestamp) values ('$tran_user1_id','$tran_user1','-$tran_amt','now');" 
            $db_conn "insert into transaction (id,username,amount,timestamp) values ('$tran_user2_id','$tran_user2','+$tran_amt','now');" 
            LAST_USER=$tran_user1 ;;

        4 ) $db_conn "select id,username,balance from account join balance using (id) where username='$LAST_USER';" ;; 

        * ) clear ;;
    esac
done
}

tran_menu() {
clear
while true
do
    echo ""
    echo "1) Show Transactions for user"
    echo "2) Show last # Transactions."
    echo "3) Show last 5 Transactions."
    echo ""
    echo "q) Go back." 
    echo ""
    read -n1 -p "*Transaction Menu: Select from above: " ii_tmenu 
    case $ii_tmenu in
        1 ) echo ""
            read -p "Transactions for user: " tmenu_user
            read -p "Number of transactions: (0 for no limit) " tmenu_num1
            if [ $tmenu_num1 = 0 ]; then { 
                tmenu_num1=all
            } fi
            $db_conn "select id,username,amount,timestamp from transaction where username = '$tmenu_user' order by timestamp DESC limit $tmenu_num1;" ;;
        2 ) echo ""
            read -p "Number of transactions: " tmenu_num2
            if [ $tmenu_num2 = 0 ]; then { 
                tmenu_num2=all
            } fi
            $db_conn "select id,username,amount,timestamp from transaction order by timestamp DESC limit $tmenu_num2;" ;;
        3 ) echo ""
            $db_conn "select id,username,amount,timestamp from transaction order by timestamp DESC limit 5;"    ;;
        [0q] ) break ;;
        * ) clear ;;

    esac
done
}

dis_user() {
clear
echo "Warning!!! Users cannot be re-enabled."
read -p "**Disable User: " dis_user
echo""
echo""
echo "Verify the following information is correct."
$db_conn "select id,username from account where username = '$dis_user';"
read -n1 -p "Disable User (y/N) " i_dis
case $i_dis in
    [Yy] ) $db_conn "update account set active = 'f' where username = '$dis_user';" ; echo "" ;;
    * ) echo "Aborted"
        echo ""  ;;
esac
}

clear
while true 
do
    # Main Menu
    echo ""
    echo "DDBank Main Menu: "
    echo "1) Create new user account."
    echo "2) List user accounts."
    echo "3) List user(s) balance."
    echo "4) Banking Menu (Deposit, withdraw, transfer)"
    echo "5) Transaction Menu"
    echo ""
    echo "8) *Disable User!"
    echo "9) Clear contents of screen"
    echo "0) Exit"
    echo ""
    read -p "Select from the menu above: " -n1 i
    case $i in 
        1 ) new_account     ;;
        2 ) list_user       ;;
        3 ) list_balance    ;;
        4 ) bank_menu       ;;
        5 ) tran_menu       ;;
        8 ) dis_user        ;;
        9 ) clear           ;;
        0 ) break           ;;  
        * ) clear           ;;
    esac
done

#if [ $i == 1 ]; then {
#    new_account
#} else {
#    echo "Some other thing..."
#} fi