using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using Bytescout.PDF;

namespace FillFormExample
{
    /// <summary>
    /// This example demonstrates how to fill PDF form programmatically.
    /// </summary>
    class Program
    {
        static void Main()
        {
            // Load PDF form
            Document pdfDocument = new Document(@".\I130.pdf");
            pdfDocument.RegistrationName = "demo";
            pdfDocument.RegistrationKey = "demo";

            // Iterate through all pages
            for (int i = 0; i < pdfDocument.Pages.Count; i++)
            {
                // Get current page
                Page page = pdfDocument.Pages[i];

                // Get FieldMap if exists
                var fieldMap = GetPageAnnotationValues(i);

                // Get widget by its name and change value
                foreach (KeyValuePair<string, object> keyValuePair in fieldMap)
                {
                    Annotation annotation = page.Annotations[keyValuePair.Key];

                    if (annotation is CheckBox)
                    {
                        ((CheckBox)annotation).Checked = Convert.ToBoolean(keyValuePair.Value);
                    }
                    else if (annotation is EditBox)
                    {
                        ((EditBox)annotation).Text = (string)keyValuePair.Value;
                    }
                    else if (annotation is ComboBox)
                    {
                        ((ComboBox)annotation).Text = (string)keyValuePair.Value;
                    }
                }
            }

            // Save modified document
            pdfDocument.Save("result.pdf");

            // Cleanup 
            pdfDocument.Dispose();

            // Open result document in default associated application (for demo purpose)
            ProcessStartInfo processStartInfo = new ProcessStartInfo("result.pdf");
            processStartInfo.UseShellExecute = true;
            Process.Start(processStartInfo);
        }

        /// <summary>
        /// Get page annotation values
        /// </summary>
        static Dictionary<string, object> GetPageAnnotationValues(int pageIndex)
        {
            var lstAnnotationValues = new List<Dictionary<string, object>>();

            // Map of form fields and sample values to set

            // Set values for page-1
            var fieldMap_page1 = new Dictionary<string, object>()
            {
                { "Pt2Line11_SSN[0]", "987654321" },
                { "CheckBox1[0]", "True" },
                { "VolagNumber[0]", "V1234567" },
                { "AttorneyStateBarNumber[0]", "A2345678" },
                { "USCISOnlineAcctNumber[0]", "U45897231" },
                { "Pt1Line1_Spouse[0]", "True" },
                { "Pt1Line1_Siblings[0]", "False" },
                { "Pt1Line1_Parent[0]", "False" },
                { "Pt1Line1_Child[0]", "False" },
                { "Pt1Line2_InWedlock[0]", "True" },
                { "Pt1Line2_AdoptedChild[0]", "False" },
                { "Pt1Line2_Stepchild[0]", "False" },
                { "Pt1Line2_OutOfWedlock[0]", "False" },
                { "Pt1Line3_Yes[0]", "True" },
                { "Pt1Line4_No[0]", "False" },
                { "Pt1Line4_Yes[0]", "True" },
                { "Pt1Line3_No[0]", "False" },
                { "Pt2Line4a_FamilyName[0]", "Zawodny" },
                { "Pt2Line4b_GivenName[0]", "John" },
                { "Pt2Line4c_MiddleName[0]", "C" },
                { "Pt2Line1_AlienNumber[0]", "3948JDC" },
                { "Pt2Line2_USCISOnlineActNumber[0]", "D395083105" }
           };
            lstAnnotationValues.Add(fieldMap_page1);

            // Set values for page-2
            var fieldMap_page2 = new Dictionary<string, object>()
            {
                { "Pt2Line8_DateofBirth[0]", "02/22/1985" },
                { "Pt2Line9_Male[0]", "True" },
                { "Pt2Line9_Female[0]", "False" },
                { "Pt2Line7_CountryofBirth[0]", "Bolivia" },
                { "Pt2Line11_Yes[0]", "False" },
                { "Pt2Line11_No[0]", "True" },
                { "Pt2Line10_StreetNumberName[0]", "Happy Street" },
                { "Pt2Line10_Unit[0]", "True" },
                { "Pt2Line10_Unit[1]", "False" },
                { "Pt2Line10_Unit[2]", "False" },
                { "Pt2Line10_AptSteFlrNumber[0]", "12" },
                { "Pt2Line10_CityOrTown[0]", "NJ" },
                { "Pt2Line10_Province[0]", "Province" },
                { "Pt2Line10_PostalCode[0]", "39392" },
                { "Pt2Line10_ZipCode[0]", "39392" },
                { "Pt2Line10_State[0]", "NJ" },
                { "Pt2Line10_Country[0]", "USA" },
                { "Pt2Line10_InCareofName[0]", "Mrs Maizel" },
                { "Pt2Line14_StreetNumberName[0]", "Happy Street" },
                { "Pt2Line14_Unit[0]", "False" },
                { "Pt2Line14_Unit[1]", "True" },
                { "Pt2Line14_Unit[2]", "False" },
                { "Pt2Line14_AptSteFlrNumber[0]", "14" },
                { "Pt2Line14_CityOrTown[0]", "NY" },
                { "Pt2Line14_State[0]", "NY" },
                { "Pt2Line14_ZipCode[0]", "10001" },
                { "Pt2Line14_Province[0]", "Province" },
                { "Pt2Line14_Country[0]", "USA" },
                { "Pt2Line14_PostalCode[0]", "10001" },
                { "Pt2Line13a_DateFrom[0]", "12/30/2010" },
                { "Pt2Line15a_DateFrom[0]", "11/23/2010" },
                { "Pt2Line15b_DateTo[0]", "11/28/2010" },
                { "Pt2Line12_StreetNumberName[0]", "Happy Street" },
                { "Pt2Line12_Unit[0]", "False" },
                { "Pt2Line12_Unit[1]", "False" },
                { "Pt2Line12_Unit[2]", "True" },
                { "Pt2Line12_AptSteFlrNumber[0]", "14" },
                { "Pt2Line12_CityOrTown[0]", "NY" },
                { "Pt2Line12_State[0]", "NY" },
                { "Pt2Line12_ZipCode[0]", "10001" },
                { "Pt2Line12_Province[0]", "" },
                { "Pt2Line12_Country[0]", "USA" },
                { "Pt2Line12_PostalCode[0]", "12332"},
                { "Pt2Line6_CityTownOfBirth[0]", "Bolivia" },
                { "Pt2Line5a_FamilyName[0]", "Zawodny" },
                { "Pt2Line5b_GivenName[0]", "John" },
                { "Pt2Line5c_MiddleName[0]", "C" },
                { "Pt2Line16_NumberofMarriages[0]", "1" },
                { "Pt2Line17_Widowed[0]", "False" },
                { "Pt2Line17_Annulled[0]", "False" },
                { "Pt2Line17_Separated[0]", "False" },
                { "Pt2Line17_Single[0]", "False" },
                { "Pt2Line17_Married[0]", "True" },
                { "Pt2Line17_Divorced[0]", "False" },
                { "Pt2Line13b_DateTo[0]", "12/20/2011" },
           };

            lstAnnotationValues.Add(fieldMap_page2);

            if (pageIndex < lstAnnotationValues.Count)
            {
                return lstAnnotationValues.ElementAt(pageIndex);
            }

            // Return empty dictionary
            return new Dictionary<string, object>();
        }

    }
}