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;
        }

        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
                {
                    RxNum = txtRxNum.Text;

                    if (RxNum.Length > 30)
                    {
                        throw new Exception();
                    }

                }
                catch (Exception exception)
                {
                    epLocal.SetError(txtRxNum, "Invalid Value");
                    hasFailed = true;
                }
                try
                {

                    Physician_id = txtPhysID.Text;

                    if (Physician_id.Length > 8)
                    {
                        throw new Exception();
                    }

                }
                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)
                    {
                        RxNum = "0" + RxNum;
                    }
                }
                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.txtRxNumber.Text = RxNum;
                    //SourceForm.btnRxSearch_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_2(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;

            if (txtRxNum.Text.Length > 0 && txtRxNum.Text.Length <= 11)
            {
                RxNum_id = txtRxNum.Text;
            }

            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");
                }
            }
            
            if (txtMedID.Text.Length > 0)
            {
                Medication_id = txtMedID.Text;
                
                if (!Exists("MEDICATION", Medication_id))
                {
                    hasFailed = true;
                    epLocal.SetError(txtMedID, "Medication Does Not Exist");
                }
            }
            
            if (txtPhysID.Text.Length > 0)
            {
                PhysicianID = txtPhysID.Text;
                
                if (!Exists("PHYSICIAN", PhysicianID))
                {
                    hasFailed = true;
                    epLocal.SetError(txtPhysID, "Physician Does Not Exist");
                }
            }
            
            try
            {

                if (txtCompletedRefills.Text.Length > 0)
                {
                    pastNumRefills = int.Parse(txtCompletedRefills.Text);
                }
                
            }
            catch (Exception exception)
            {
                epLocal.SetError(txtCompletedRefills, "Invalid Value");
                hasFailed = true;
            }
            
            try
            {
                if (txtMaxRefills.Text.Length > 0)
                {
                numRefills = int.Parse(txtMaxRefills.Text);
                }
                if (numRefills < 0)
                {
                    throw new Exception();
                }
                

            }
            catch (Exception exception)
            {
                epLocal.SetError(txtMaxRefills, "Invalid Value");
                hasFailed = true;
            }

        }


        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)
        {

        }

    }
}