#!/bin/bash

input=("" "" "" "" "" "" "")

myFile=imenik_26097.dat

function potrdi(){
    read -p "Potrdi? y/n : " -n 1 -r
    if [[ $REPLY != "y" ]]; then
        echo ""
        echo "Prekinjeno!"
        exit 1
    fi
    echo ""
}

function isciPod(){
    formString=$(printf '%s;' "${input[@]/#/.*}")
    
    if grep -q "$formString" "$myFile"; then
        grep "$formString" "$myFile"
    else
        echo "Ni kontakta"
    fi
}

function urediPod(){

    # The '-F' option specifies the field separator as a semicolon and the '-v' option creates a variable 'ref' with the value of the first element of the 'input' array.
    # The pattern to search for is '$1==ref', which means the first field of the line (i.e., the part of the line before the first semicolon) should match the value of 'ref'.
    searchedLine=$(awk -F';' -v ref="${input[0]}" '$1==ref {print}' $myFile)
    if [[ $searchedLine == "" ]]; then
        echo "ERROR: Ni osebe z tem id"
        exit 1
    fi

    IFS=';' read -r -a array <<< "$searchedLine"
    for i in "${!input[@]}"; do
        [[ "${input[$i]}" != "" ]] && array[$i]="${input[$i]}"
    done
    newLine=$(IFS=';' ; echo "${array[*]}")

    # s substitution
    # g all occurrences of the searched string should be replaced
    sed -i "s|${searchedLine}|${newLine}|g" $myFile
    echo "Urejeno uspesno."
}

function odstraniPod(){
    #-i modify the file in-place.
    # /d delete
    sed -i "/${input[0]};/d" "$myFile"
    echo "Kontakt zbrisan."
}

function dodajPod(){

    input[0]=$(($RANDOM % 99999 + 1))

    # Set any empty input values to "PRAZNO"
    for i in "${!input[@]}"
    do
        if [[ -z "${input[$i]}" ]]; then
            input[$i]="PRAZNO"
        fi
    done

    # Append each input value to the file separated by ';'
    printf "%s;" "${input[@]}" >> $myFile
    echo "" >> $myFile

    # Print success message
    echo "Kontakt dodan ${input[@]}"
}

# The `! -f` operator checks if the file does not exist.
if [ ! -f "$myFile" ]; then
    echo "" > $myFile
fi

selection=$1

shift
while [ $# -gt 0 ] ; do
    case $1 in
        -id) input[0]="$2" ;;
        -ime) input[1]="$2" ;;
        -priimek) input[2]="$2" ;;
        -naslov) input[3]="$2" ;;
        -posta) input[4]="$2" ;;
        -kraj) input[5]="$2" ;;
        -tel) input[6]="$2" ;;
        *)
            echo "ERROR napacen kljuc $1"
            exit 1 
            ;;
    esac
    shift
    shift
done

potrdi

# izbiranje funkcije
case $selection in
    -dodaj) 
        dodajPod
     "$@" ;;
    -izbrisi)
        odstraniPod "$@" ;;
    -isci) 
        isciPod "$@" ;;
    -uredi)
        urediPod "$@" ;;
    *)
        echo "ERROR napacen ukaz $selection" 
        exit 1
        ;;
esac