using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

using System.Drawing.Imaging;
using System.Net.NetworkInformation;

namespace Louis__Pharmacy_CNSA212_FP
{
    public partial class frmPrescription : Form
    {
        private readonly bool isAdd;
        private frmInfo SourceForm;
        ErrorProvider epLocal = new ErrorProvider();
        public frmPrescription(frmInfo sourceForm, bool isNew)
        {


            SourceForm = sourceForm;

            isAdd = isNew;
            InitializeComponent();



            if (isNew)
            {
                lblDisPurpose.Text = "Add Prescription";
                btnGO.Text = "Create";
            }
            else
            {
                lblDisPurpose.Text = "Edit Prescription";
                btnGO.Text = "Update";
            }
            KeyPreview = true;
            KeyDown += frmPrescription_KeyDown;

            txtRxNum.Enabled = false;
            txtCompletedRefills.Text = "0";
        }

        private void frmPrescription_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Escape)
                Close();

            if (e.KeyCode == Keys.Enter) btnGO_Click(sender, e);
        }

        public void FillPrescription(string rxNum, string medID, string physID, string patID)
        {
            var ds = new DataSet();
            var data = new PharmacyDataTier();

            ds = PharmacyDataTier.PrescriptionInfoSearch(rxNum,medID,physID,patID);
            txtRxNum.Text = ds.Tables[0].Rows[0]["RxNum"].ToString();
            txtPatID.Text = ds.Tables[0].Rows[0]["Patient_id"].ToString();
            txtMedID.Text = ds.Tables[0].Rows[0]["Medication_id"].ToString();
            txtPhysName.Text = ds.Tables[0].Rows[0]["Physician_name"].ToString();
            txtPhysID.Text = ds.Tables[0].Rows[0]["Physician_id"].ToString();
            txtCompletedRefills.Text = ds.Tables[0].Rows[0]["Completed_refills"].ToString();
            txtMaxRefills.Text = ds.Tables[0].Rows[0]["Max_refills"].ToString();
        }
        public void FillPrescription(string rxNum)
        {
            var ds = new DataSet();
            var data = new PharmacyDataTier();

            ds = PharmacyDataTier.PrescriptionInfoSearch(rxNum);
            txtRxNum.Text = ds.Tables[0].Rows[0]["RxNum_id"].ToString();
            txtPatID.Text = ds.Tables[0].Rows[0]["Patient_id"].ToString();
            txtMedID.Text = ds.Tables[0].Rows[0]["Medication_id"].ToString();
            txtPhysName.Text = ds.Tables[0].Rows[0]["PrescribedBy"].ToString();
            txtPhysID.Text = ds.Tables[0].Rows[0]["Physician_id"].ToString();
            txtCompletedRefills.Text = ds.Tables[0].Rows[0]["pastNumRefills"].ToString();
            txtMaxRefills.Text = ds.Tables[0].Rows[0]["numRefills"].ToString();
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            Close();
        }

        // private void btnGO_Click(object sender, EventArgs e)
        // {
        //
        //     var hasFailed = false;
        //
        //     var Patient_id = "";
        //     var Medication_id = "";
        //     var Physician_name = "";
        //     var Physician_id = "";
        //     var Completed_refills = "";
        //     var Max_refills = "";
        //     var RxNum = "";
        //
        //
        //     if (txtMedID.Text.Length + txtPhysName.Text.Length + txtMedID.Text.Length + txtPhysID.Text.Length + txtCompletedRefills.Text.Length + txtMaxRefills.Text.Length + txtRxNum.Text.Length > 0)
        //     {
        //
        //         try
        //         {
        //
        //             Patient_id = txtPatID.Text;
        //
        //             if (Patient_id.Length > 8)
        //             {
        //                 throw new Exception();
        //             }else
        //                 while (Patient_id.Length < 8)
        //                 {
        //                     Patient_id = "0" + Patient_id;
        //                 }
        //
        //         }
        //         catch (Exception exception)
        //         {
        //             epLocal.SetError(txtPatID, "Invalid Value");
        //             hasFailed = true;
        //         }
        //
        //         try
        //         {
        //             RxNum = txtRxNum.Text;
        //
        //             if (RxNum.Length > 11)
        //             {
        //                 throw new Exception();
        //             }
        //             else
        //             {
        //                 while (RxNum.Length < 11)
        //                 {
        //                     RxNum = "0" + RxNum;
        //                 }
        //             }
        //
        //         }
        //         catch (Exception exception)
        //         {
        //             epLocal.SetError(txtRxNum, "Invalid Value");
        //             hasFailed = true;
        //         }
        //         try
        //         {
        //
        //             Physician_id = txtPhysID.Text;
        //
        //             if (Physician_id.Length > 8)
        //             {
        //                 throw new Exception();
        //             }else
        //                 while (Physician_id.Length < 8)
        //                 {
        //                     Physician_id = "0" + Physician_id;
        //                 }
        //
        //         }
        //         catch (Exception exception)
        //         {
        //             epLocal.SetError(txtPhysID, "Invalid Value");
        //             hasFailed = true;
        //         }
        //         try
        //         {
        //             Physician_name = txtPhysName.Text;
        //             if (Physician_name.Length > 30)
        //             {
        //                 throw new Exception();
        //             }
        //             
        //         }
        //         catch (Exception exception)
        //         {
        //             epLocal.SetError(txtPhysName, "Invalid Value");
        //             hasFailed = true;
        //         }
        //
        //         try
        //         {
        //             Medication_id = txtMedID.Text;
        //             if (Medication_id.Length > 7)
        //             {
        //                 throw new Exception();
        //             }
        //
        //             while (Medication_id.Length < 7)
        //             {
        //                 Medication_id = "0" + Medication_id;
        //             }
        //         }
        //         catch (Exception exception)
        //         {
        //             epLocal.SetError(txtMedID, "Invalid Value");
        //             hasFailed = true;
        //         }
        //         if (!hasFailed)
        //         {
        //             if (isAdd)
        //             {
        //                 PharmacyDataTier.CreatePrescription(
        //                     RxNum,
        //                     Patient_id,
        //                     Medication_id,
        //                     Physician_name,
        //                     Physician_id,
        //                     Completed_refills,
        //                     Max_refills);
        //             }
        //             else
        //             {
        //                 PharmacyDataTier.UpdatePrescription(
        //                     RxNum,
        //                     Patient_id,
        //                     Medication_id,
        //                     Physician_name,
        //                     Physician_id,
        //                     Completed_refills,
        //                     Max_refills);
        //             }
        //
        //             SourceForm.txtRxPrescriptionID.Text = RxNum;
        //             SourceForm.btnPrescriptionSearch_Click(sender, e);
        //             Close();
        //
        //
        //         }
        //     }
        //
        // }

        private void frmPrescription_Load(object sender, EventArgs e)
        {
            //txtMedID.Enabled = false;

            if (isAdd)
            {
                var nextID = PharmacyDataTier.GetNextRxNum();
                txtRxNum.Text = nextID.ToString();
            }
        }

        private bool Exists(string Table, string find)
        {
            bool value = false;

            if (Table == "PHYSICIAN")
            {

                DataSet ds = PharmacyDataTier.PhysicianInfoSearch(find);


                if (ds != null && ds.Tables[0].Rows.Count > 0)
                {
                    value = true;
                }
                
            }else if (Table == "PATIENT")
            {

                DataSet ds = PharmacyDataTier.PatientInfoSearch(find);


                if (ds != null && ds.Tables[0].Rows.Count > 0)
                {
                    value = true;
                }
                
            }else if (Table == "MEDICATION")
            {

                DataSet ds = PharmacyDataTier.MedicationInfoSearch(find);


                if (ds != null && ds.Tables[0].Rows.Count > 0)
                {
                    value = true;
                }
                
            }
            else
            {
                throw new Exception("TableNotFound");
            }
            
            return value;

        }
        
        
        private void btnGO_Click(object sender, EventArgs e)
        {
        
            string RxNum_id = "";
            int numRefills = 0;
            int pastNumRefills = 0;
            string PrescribedBy = "";
            string PhysicianID = "";
            string Medication_id = "";
            string Patient_id = "";
        
            bool hasFailed = false;
            
            epLocal.Clear();
        
            if (txtRxNum.Text.Length > 0 && txtRxNum.Text.Length <= 11)
            {
                RxNum_id = txtRxNum.Text;

                while (RxNum_id.Length < 11)
                {
                    RxNum_id = "0" + RxNum_id;
                }
                
            }
        
            if (txtPhysName.Text.Length > 0)
            {
                PrescribedBy = txtPhysName.Text;
            }
            else
            {
                epLocal.SetError(txtPhysName, "Must Enter a Value");
            }
            
            if (txtPatID.Text.Length > 0)
            {
                Patient_id = txtPatID.Text;
                
                if (!Exists("PATIENT", Patient_id))
                {
                    hasFailed = true;
                    epLocal.SetError(txtPatID, "Patient Does Not Exist");
                }
                else
                {
                    while (Patient_id.Length < 8)
                    {
                        Patient_id = "0" + Patient_id;
                    }
                }
            }
            else
            {
                hasFailed = true;
                epLocal.SetError(txtPatID, "Must Enter A Patient ID");
            }
            
            if (txtMedID.Text.Length > 0)
            {
                Medication_id = txtMedID.Text;
                
                if (!Exists("MEDICATION", Medication_id))
                {
                    hasFailed = true;
                    epLocal.SetError(txtMedID, "Medication Does Not Exist");
                }
                else
                {
                    while (Medication_id.Length < 7)
                    {
                        Medication_id = "0" + Medication_id;
                    }
                }
            }
            else
            {
                hasFailed = true;
                epLocal.SetError(txtMedID, "Must Enter a Medication ID");
            }
            
            if (txtPhysID.Text.Length > 0)
            {
                PhysicianID = txtPhysID.Text;
                
                if (!Exists("PHYSICIAN", PhysicianID))
                {
                    hasFailed = true;
                    epLocal.SetError(txtPhysID, "Physician Does Not Exist");
                }
                else
                {
                    while (PhysicianID.Length < 8)
                    {
                        PhysicianID = "0" + PhysicianID;
                    }
                }
            }
            else
            {
                hasFailed = true;
                epLocal.SetError(txtPhysID, "Must Enter a Physician ID");
            }
            
            try
            {
        
                if (txtCompletedRefills.Text.Length > 0)
                {
                    pastNumRefills = int.Parse(txtCompletedRefills.Text);
                }
                else throw new Exception();
        
            }
            catch (Exception exception)
            {
                epLocal.SetError(txtCompletedRefills, "Invalid Value");
                hasFailed = true;
            }
            
            try
            {
                if (txtMaxRefills.Text.Length > 0)
                {
                numRefills = int.Parse(txtMaxRefills.Text);
                }else 
                {
                    throw new Exception();
                }
                
        
            }
            catch (Exception exception)
            {
                epLocal.SetError(txtMaxRefills, "Invalid Value");
                hasFailed = true;
            }
            if (!hasFailed)
            {
                if (isAdd)
                {
                    PharmacyDataTier.CreatePrescription(
                        RxNum_id,
                    Patient_id, Medication_id,
                    PrescribedBy,
                        PhysicianID,
                    pastNumRefills, 
                        numRefills);
                }
                else
                {
                    PharmacyDataTier.UpdatePrescription(
                        RxNum_id,
                        Patient_id, Medication_id,
                        PrescribedBy,
                        PhysicianID,
                        pastNumRefills, 
                        numRefills);
                }

                SourceForm.txtRxPrescriptionID.Text = RxNum_id;
                SourceForm.btnPrescriptionSearch_Click(sender, e);
                Close();


            }
        }


        private void txtMedID_TextChanged(object sender, EventArgs e)
        {
            epLocal.SetError(txtMedID, "");
        }

        private void txtPhysName_TextChanged(object sender, EventArgs e)
        {
            epLocal.SetError(txtPhysName, "");
        }


        private void txtPhysID_TextChanged(object sender, EventArgs e)
        {
            epLocal.SetError(txtPhysID, "");
        }

        private void txtCompletedRefills_TextChanged(object sender, EventArgs e)
        {
            epLocal.SetError(txtCompletedRefills, "");
        }

        private void txtMaxRefills_TextChanged(object sender, EventArgs e)
        {
            epLocal.SetError(txtMaxRefills, "");
        }

        private void txtRxNum_TextChanged(object sender, EventArgs e)
        {
            epLocal.SetError(txtRxNum, "");
        }

        private void btnGO_Click_1(object sender, EventArgs e)
        {

        }

        private void txtRxNum_TextChanged_1(object sender, EventArgs e)
        {
            epLocal.SetError(txtRxNum,"");
        }

        private void txtPatID_TextChanged(object sender, EventArgs e)
        {
            
            epLocal.SetError(txtPatID,"");
        }

        private void txtMedID_TextChanged_1(object sender, EventArgs e)
        {
            
            epLocal.SetError(txtMedID,"");
        }

        private void txtPhysName_TextChanged_1(object sender, EventArgs e)
        {
            
            epLocal.SetError(txtPhysName,"");
        }

        private void txtPhysID_TextChanged_1(object sender, EventArgs e)
        {
            
            epLocal.SetError(txtPhysID,"");
        }

        private void txtCompletedRefills_TextChanged_1(object sender, EventArgs e)
        {
            
            epLocal.SetError(txtCompletedRefills,"");
        }

        private void txtMaxRefills_TextChanged_1(object sender, EventArgs e)
        {
            
            epLocal.SetError(txtMaxRefills,"");
        }

        private void btnCancel_Click_1(object sender, EventArgs e)
        {
            Close();
        }
    }
}