# sqlite db replace function
replace_in_sqlite_db() {
    local DB_PATH="$1"
    local OLD_STRING="$2"
    local NEW_STRING="$3"

    # Check if the database file exists
    if [ ! -f "$DB_PATH" ]; then
        echo "Error: Database file '$DB_PATH' does not exist."
        exit 1
    fi

    echo "Starting replacement of '$OLD_STRING' with '$NEW_STRING' in '$DB_PATH'..."

    # Create a backup of the original database
    local BACKUP_PATH="${DB_PATH}.bak"
    cp "$DB_PATH" "$BACKUP_PATH"

    # Escape single quotes for SQL
    local OLD_STRING_ESC=$(printf '%s\n' "$OLD_STRING" | sed "s/'/''/g")
    local NEW_STRING_ESC=$(printf '%s\n' "$NEW_STRING" | sed "s/'/''/g")

    # Get a list of all tables in the database
    local TABLES
    TABLES=$(sqlite3 "$DB_PATH" ".tables")

    # Loop through each table
    for TABLE in $TABLES; do
        echo "Processing table: $TABLE"

        # Escape table name if it's a reserved keyword
        local ESCAPED_TABLE
        if [[ "$TABLE" =~ ^(index|group|order|table|view|database|schema|trigger|transaction|commit|rollback|savepoint|release|alter|create|drop|insert|update|delete|select|from|where|join|union|intersect|except|limit|offset|order|by|group|having|as|with|replace|cast|case|when|then|else|end|and|or|not|is|null|between|in|like|glob|match|regexp|collate|exists|unique|primary|key|foreign|references|check|constraint|default|collate|asc|desc|on|using|natural|left|right|full|outer|cross|inner)$ ]]; then
            ESCAPED_TABLE="\"$TABLE\""
        else
            ESCAPED_TABLE="$TABLE"
        fi

        # Get a list of all non-BLOB columns in the table
        sqlite3 "$DB_PATH" "PRAGMA table_info($ESCAPED_TABLE);" 2>/dev/null | awk -F'|' '
        {
            if ($3 != "BLOB") {
                print $2
            }
        }' | while read -r COLUMN; do
            if [ -n "$COLUMN" ]; then
                echo "  Processing column: $COLUMN"

                # Escape column name if it's a reserved keyword
                local ESCAPED_COLUMN
                if [[ "$COLUMN" =~ ^(index|group|order|table|view|database|schema|trigger|transaction|commit|rollback|savepoint|release|alter|create|drop|insert|update|delete|select|from|where|join|union|intersect|except|limit|offset|order|by|group|having|as|with|replace|cast|case|when|then|else|end|and|or|not|is|null|between|in|like|glob|match|regexp|collate|exists|unique|primary|key|foreign|references|check|constraint|default|collate|asc|desc|on|using|natural|left|right|full|outer|cross|inner)$ ]]; then
                    ESCAPED_COLUMN="\"$COLUMN\""
                else
                    ESCAPED_COLUMN="$COLUMN"
                fi

                # Update only rows where the column contains OLD_STRING
                # Run each update in its own connection to avoid locking issues
                sqlite3 "$DB_PATH" "
                UPDATE $ESCAPED_TABLE
                SET $ESCAPED_COLUMN = replace(CAST($ESCAPED_COLUMN AS TEXT), '$OLD_STRING_ESC', '$NEW_STRING_ESC')
                WHERE CAST($ESCAPED_COLUMN AS TEXT) LIKE '%$OLD_STRING_ESC%';
                "
            fi
        done
    done

    echo "Replacement completed in '$DB_PATH'. Original database backed up to '$BACKUP_PATH'."
}

#set script directory
scriptdir="$(dirname "$(realpath "$0")")"

#example usage: replace_in_sqlite_db "database.sqlite" "Europe/Amsterdam" "UTC"
cp $scriptdir/stacks/dashboard/www/app-pre.sqlite $scriptdir/stacks/dashboard/www/app.sqlite
replace_in_sqlite_db "$scriptdir/stacks/dashboard/www/app.sqlite" "mydomain.com" "<domain>"
replace_in_sqlite_db "$scriptdir/stacks/dashboard/www/app.sqlite" "192.168.2.132" "<localip>"
replace_in_sqlite_db "$scriptdir/stacks/dashboard/www/app.sqlite" "blah" "<adminpass>"
replace_in_sqlite_db "$scriptdir/stacks/dashboard/www/app.sqlite" "0.0.0.0/0" "<localip>"