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;


namespace Louis__Pharmacy_CNSA212_FP
{
    public partial class frmInfo : Form
    {
        
        private ErrorProvider ep1 = new ErrorProvider();
        
        public DataSet ds = new DataSet();
        
        public frmInfo()
        {
            InitializeComponent();

            dgvPatient.DoubleClick += cmuPatientEdit_Click;
            dgvPhysician.DoubleClick += cmuPhysicianEdit_Click;
            dgvRx.DoubleClick += cmuRxEdit_Click;

            tbcInfo.SelectedIndexChanged += frmInfoTabChange;

        }

        private void frmInfo_Load(object sender, EventArgs e)
        {

            KeyPreview = true;
            KeyDown += frmInfo_KeyDown;

            cmuPatientEdit.Enabled = false;
            cmuPatientDelete.Enabled = false;
            cmuPhysicianEdit.Enabled = false;
            cmuPhysicianDelete.Enabled = false;
            cmuMedicationEdit.Enabled = false;
            cmuMedicationDelete.Enabled = false;


            txtPatientFirst.Focus();

            patientIsActive = true;

        }

        private bool physicianIsActive;
        private bool patientIsActive;
        private bool medicationIsActive;
        private bool prescriptionIsActive;
        private void frmInfoTabChange(object sender, EventArgs e)
        {

            Console.WriteLine(tbcInfo.SelectedIndex);
            
            patientIsActive = false;
            physicianIsActive = false;
            medicationIsActive = false;
            prescriptionIsActive = false;
            
            
            if (tbcInfo.SelectedIndex == 0)
            {
                patientIsActive = true;
            }
            else if (tbcInfo.SelectedIndex == 1)
            {
                medicationIsActive = true;
            }
            else if (tbcInfo.SelectedIndex == 2)
            {
                physicianIsActive = true;
            }
            else if (tbcInfo.SelectedIndex == 3)
            {
                prescriptionIsActive = true;
            }
            
        }

        private void frmInfo_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Escape) 
            {this.Close(); 
            }
            
            
            
            //  if data grid view is not focused, run the search function
            if (e.KeyCode == Keys.Enter && physicianIsActive && !dgvPhysician.Focused){
                btnPhysicianSearch_Click(sender, e);
            }
            //  if data grid view is focused, run the edit function
            else if (e.KeyCode == Keys.Enter && physicianIsActive && dgvPhysician.Focused)
            {
                cmuPhysicianEdit_Click(sender, e);
            }

            if (patientIsActive && e.KeyCode == Keys.Delete)
            {
                cmuPatientDelete_Click(sender, e);
            }
            if (physicianIsActive && e.KeyCode == Keys.Delete)
            {
                cmuPhysicianDelete_Click(sender, e);
            }
            if (medicationIsActive && e.KeyCode == Keys.Delete)
            {
                cmuMedicationDelete_Click(sender, e);
            }
            if (prescriptionIsActive && e.KeyCode == Keys.Delete)
            {
                cmuPrescriptionDelete_Click(sender, e);
            }

            
            
            
            //  if data grid view is not focused, run the search function
            if (e.KeyCode == Keys.Enter && patientIsActive && !dgvPatient.Focused)
            {
                btnPatientSearch_Click(sender,e);
            }
            //  if data grid view is focused, run the edit function
            else if (e.KeyCode == Keys.Enter && patientIsActive && dgvPatient.Focused)
            {
                cmuPatientEdit_Click(sender,e);
            }   
            
            //  if data grid view is not focused, run the search function
            if (e.KeyCode == Keys.Enter && prescriptionIsActive && !dgvPrescription.Focused)
            {
                btnPatientSearch_Click(sender,e);
            }
            //  if data grid view is focused, run the edit function
            else if (e.KeyCode == Keys.Enter && prescriptionIsActive && dgvPrescription.Focused)
            {
                cmuPrescriptionEdit_Click(sender,e);
            }
            
            
            
            //  if data grid view is not focused, run the search function
            if (e.KeyCode == Keys.Enter && medicationIsActive && !dgvRx.Focused)
            {
                btnRxSearch_Click(sender,e);
            }
            //  if data grid view is focused, run the edit function
            else if (e.KeyCode == Keys.Enter && medicationIsActive && dgvRx.Focused)
            {
                cmuRxEdit_Click(sender,e);
            }
            
            
            
        }
        
        private void addUpdatePatientAndPhysicianToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }

        private void pATIENTBindingNavigatorSaveItem_Click(object sender, EventArgs e)
        {

        }

        public void btnPatientSearch_Click(object sender, EventArgs e)
        {
            string fname = "";
            string lname = "";
            string id = "";

            
            
            if (txtPatientFirst.Text.Length + txtPatientLast.Text.Length + txtPatientID.Text.Length > 0)
            {

                try
                {

                    fname = txtPatientFirst.Text;

                    try
                    {

                        lname = txtPatientLast.Text;

                        try
                        {

                            id = txtPatientID.Text;

                            try
                            {
                                

                                ds = PharmacyDataTier.PatientInfoSearch(id,lname,fname);
                                
                                
                                if (ds.Tables[0].Rows.Count > 0) // There is a record.
                                {
                                    dgvPatient.Visible = true;
                                    // Get data source.
                                    dgvPatient.DataSource = ds.Tables[0];
                                    dgvPatient.AlternatingRowsDefaultCellStyle.BackColor = Color.LightGreen;

                                    // Set the row and column header styles.
                                    dgvPatient.ColumnHeadersDefaultCellStyle.ForeColor = Color.White;
                                    dgvPatient.ColumnHeadersDefaultCellStyle.BackColor = Color.Green;
                                }
                                else
                                {
                                    dgvPatient.Visible = false; // Hide the DataGridView if no results are found.
                                    MessageBox.Show("No records found.");
                                }
                                

                            }
                            catch (Exception exception)
                            {
                                
                                ep1.SetError(btnPatientSearch, "Error Searching");
                                
                            }
                            

                        }
                        catch (Exception exception)
                        {
                            
                            ep1.SetError(txtPatientID, "Invalid Value");
                            
                        }

                    }
                    catch (Exception exception)
                    {
                        
                        ep1.SetError(txtPatientLast, "Invalid Value");
                        
                    }
                    
                }
                catch (Exception exception)
                {
                    ep1.SetError(txtPatientFirst, "Invalid Value");
                }
                
            }
            
            
            cmuPatientEdit.Enabled = dgvPatient.Rows.Count > 0;
            cmuPatientDelete.Enabled = dgvPatient.Rows.Count > 0;

            dgvPatient.Focus();

        }

        // public void btnPrescriptionSearch_Click(object sender, EventArgs e)
        // {
        //      string medID = "";
        //     string medicationName = "";
        //
        //
        //     if (txtPrescriptionPatID.Text.Length+txtRxNumber.Text.Length > 0)
        //     {
        //
        //
        //         try
        //         {
        //
        //             medicationName = txtPrescriptionPatID.Text;
        //
        //             try
        //             {
        //
        //                 medID = txtRxNumber.Text;
        //
        //                 try
        //                 {
        //
        //
        //                     ds = PharmacyDataTier.MedicationInfoSearch(medID,medicationName);
        //
        //
        //                     if (ds.Tables[0].Rows.Count > 0) // There is a record.
        //                     {
        //                         dgvRx.Visible = true;
        //                         // Get data source.
        //                         dgvRx.DataSource = ds.Tables[0];
        //                         dgvRx.AlternatingRowsDefaultCellStyle.BackColor = Color.LightGreen;
        //
        //                         // Set the row and column header styles.
        //                         dgvRx.ColumnHeadersDefaultCellStyle.ForeColor = Color.White;
        //                         dgvRx.ColumnHeadersDefaultCellStyle.BackColor = Color.Green;
        //                     }
        //                     else
        //                     {
        //                         dgvPatient.Visible = false; // Hide the DataGridView if no results are found.
        //                         MessageBox.Show("No records found.");
        //                     }
        //
        //
        //                 }
        //                 catch (Exception exception)
        //                 {
        //
        //                     ep1.SetError(btnMedicationSearch, "Error Searching");
        //
        //                 }
        //
        //
        //             }
        //             catch (Exception exception)
        //             {
        //
        //                 ep1.SetError(txtRxNumber, "Invalid Value");
        //
        //             }
        //
        //         }
        //         catch (Exception exception)
        //         {
        //
        //             ep1.SetError(txtPrescriptionPatID, "Invalid Value");
        //
        //         }
        //     }
        //
        //     
        //     cmuMedicationEdit.Enabled = dgvRx.Rows.Count > 0;
        //     cmuMedicationDelete.Enabled = dgvRx.Rows.Count > 0;
        //     
        //     dgvRx.Focus();
        //
        // }



        public void btnPhysicianSearch_Click(object sender, EventArgs e)
        {
            
            string fname = "";
            string lname = "";
            string phyID = "";;

            
            if (txtPhysicianFirst.Text.Length+txtPhysicianLast.Text.Length+txtPhysicianID.Text.Length > 0)
            {

                try
                {

                    fname = txtPhysicianFirst.Text;

                    try
                    {

                        lname = txtPhysicianLast.Text;

                        try
                        {

                            phyID = txtPhysicianID.Text;

                            try
                            {


                                ds = PharmacyDataTier.PhysicianInfoSearch(fname, lname, phyID);
                                
                                
                                if (ds.Tables[0].Rows.Count > 0) // There is a record.
                                {
                                    dgvPhysician.Visible = true;
                                    // Get data source.
                                    dgvPhysician.DataSource = ds.Tables[0];
                                    dgvPhysician.AlternatingRowsDefaultCellStyle.BackColor = Color.LightGreen;

                                    // Set the row and column header styles.
                                    dgvPhysician.ColumnHeadersDefaultCellStyle.ForeColor = Color.White;
                                    dgvPhysician.ColumnHeadersDefaultCellStyle.BackColor = Color.Green;
                                }
                                else
                                {
                                    dgvPatient.Visible = false; // Hide the DataGridView if no results are found.
                                    MessageBox.Show("No records found.");
                                }
                                

                            }
                            catch (Exception exception)
                            {
                                
                                ep1.SetError(btnPhysicianSearch, "Error Searching");
                                
                            }
                            

                        }
                        catch (Exception exception)
                        {
                            
                            ep1.SetError(txtPhysicianID, "Invalid Value");
                            
                        }

                    }
                    catch (Exception exception)
                    {
                        
                        ep1.SetError(txtPhysicianLast, "Invalid Value");
                        
                    }
                    
                }
                catch (Exception exception)
                {
                    ep1.SetError(txtPhysicianFirst, "Invalid Value");
                }
                
            }

            
            cmuPhysicianEdit.Enabled = dgvPhysician.Rows.Count > 0;
            cmuPhysicianDelete.Enabled = dgvPhysician.Rows.Count > 0;
            
            dgvPhysician.Focus();

        }

        private void cmuPatientNew_Click(object sender, EventArgs e)
        {
            
                frmPatient PatientAdd = new frmPatient(this, true);
                PatientAdd.MdiParent = MdiParent;
                PatientAdd.StartPosition = FormStartPosition.CenterScreen; 
                PatientAdd.Show();
                PatientAdd.Focus();
                
            
        }

        private void cmuPatientEdit_Click(object sender, EventArgs e)
        {
            if (dgvPatient.Rows.Count > 0)
            {
                
                dgvPatient.DataSource = ds.Tables[0];
                // Console.WriteLine( dgvPatient.SelectedRows.Count);
                DataGridViewRow row = new DataGridViewRow();
                row = dgvPatient.SelectedRows[0];
                string patid = ""; 
                patid = (row.Cells[3].Value).ToString();
                frmPatient PatientAdd = new frmPatient(this, false);
                PatientAdd.MdiParent = MdiParent;
                PatientAdd.StartPosition = FormStartPosition.CenterScreen;
                PatientAdd.Show();
                PatientAdd.Focus();
                PatientAdd.FillPatient(patid);
                
            }
            
            
        }

        private void dgvPatient_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            cmuPatientEdit_Click(sender, e);
        }

        private void Panel1_Paint(object sender, PaintEventArgs e)
        {
            
        }

        private void cmuPatientDelete_Click(object sender, EventArgs e)
        {
            if (dgvPatient.Rows.Count > 0)
            {

                dgvPatient.DataSource = ds.Tables[0];
                DataGridViewRow row = new DataGridViewRow();
                row = dgvPatient.SelectedRows[0];
                string patid = "";
                patid = (row.Cells[3].Value).ToString();
                
                DialogResult dialogResult = MessageBox.Show("Are you sure you want to delete Patient: " + patid,
                    "Confirm Delete", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                if (dialogResult == DialogResult.Yes) 
                {
                    PharmacyDataTier.DeletePatient(patid);
                }
                btnPatientSearch_Click(sender, e);
            }


        }

        private void cmuPhysicianNew_Click(object sender, EventArgs e)
        {
            
            frmPhysician physicianAdd = new frmPhysician(this, true);
            physicianAdd.MdiParent = MdiParent;
            physicianAdd.StartPosition = FormStartPosition.CenterScreen; 
            physicianAdd.Show();
            physicianAdd.Focus();
            
        }

        private void cmuPhysicianEdit_Click(object sender, EventArgs e)
        {

            if (dgvPhysician.Rows.Count > 0)
            {

                dgvPhysician.DataSource = ds.Tables[0];
                DataGridViewRow row = new DataGridViewRow();
                row = dgvPhysician.SelectedRows[0];
                string phyID = "";
                phyID = (row.Cells[0].Value).ToString();
                frmPhysician PhysicianAdd = new frmPhysician(this, false);
                PhysicianAdd.MdiParent = MdiParent;
                PhysicianAdd.StartPosition = FormStartPosition.CenterScreen;
                PhysicianAdd.Show();
                PhysicianAdd.Focus();
                PhysicianAdd.FillPhysician(phyID);
            }

        }

        private void cmuPhysicianDelete_Click(object sender, EventArgs e)
        {
            if (dgvPhysician.Rows.Count > 0)
            {

                dgvPhysician.DataSource = ds.Tables[0];
                DataGridViewRow row = new DataGridViewRow();
                row = dgvPhysician.SelectedRows[0];
                string phyID = "";
                phyID = (row.Cells[0].Value).ToString();
                
                DialogResult dialogResult = MessageBox.Show("Are you sure you want to delete Physician: " + phyID,
                    "Confirm Delete", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                if (dialogResult == DialogResult.Yes) 
                {
                    PharmacyDataTier.DeletePhysician(phyID);
                }
                
                btnPhysicianSearch_Click(sender, e);
            }
        }

        // private void PhysicianReset(object sender, EventArgs e)
        // {
        //     txtPhysicianFirst.Text = "";
        //     txtPhysicianLast.Text = "";
        //     txtPhysicianID.Text = "";
        //     dgvPhysician.Visible = false;
        // }
        
        private void dgvPhysician_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
        }

        private void dgvPhysician_CellContentClick_1(object sender, DataGridViewCellEventArgs e)
        {
        }

        private void cmuRxNew_Click(object sender, EventArgs e)
        {
            frmMedication medicationAdd = new frmMedication(this, true);
            medicationAdd.MdiParent = MdiParent;
            medicationAdd.StartPosition = FormStartPosition.CenterScreen; 
            medicationAdd.Show();
            medicationAdd.Focus();
        }

        private void cmuRxEdit_Click(object sender, EventArgs e)
        {
            if (dgvRx.Rows.Count > 0)
            {

                dgvRx.DataSource = ds.Tables[0];
                DataGridViewRow row = new DataGridViewRow();
                row = dgvRx.SelectedRows[0];
                string rxID = "";
                rxID = (row.Cells[0].Value).ToString();
                frmMedication prescriptionAdd = new frmMedication(this, false);
                prescriptionAdd.MdiParent = MdiParent;
                prescriptionAdd.StartPosition = FormStartPosition.CenterScreen;
                prescriptionAdd.Show();
                prescriptionAdd.Focus();
                prescriptionAdd.FillMedication(rxID);
            }
        }

        private void cmuMedicationDelete_Click(object sender, EventArgs e)
        {



            if (dgvRx.Rows.Count > 0)
            {

                dgvRx.DataSource = ds.Tables[0];
                DataGridViewRow row = new DataGridViewRow();
                row = dgvRx.SelectedRows[0];
                string medID = "";
                medID = (row.Cells[0].Value).ToString();

                DialogResult dialogResult = MessageBox.Show("Are you sure you want to delete medication: " + medID,
                    "Confirm Delete", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
                if (dialogResult == DialogResult.Yes) 
                {
                    PharmacyDataTier.DeleteMedication(medID);
                }
                btnRxSearch_Click(sender, e);
            }
            
        }

        private void lblDisMedicationNum_Click(object sender, EventArgs e)
        {
            
        }

        private void Panel2_Paint(object sender, PaintEventArgs e)
        {
            
        }

        private void cmuPrescriptionNew_Click(object sender, EventArgs e)
        {
            
        }

        private void cmuPrescriptionEdit_Click(object sender, EventArgs e)
        {
         
            if (dgvRx.Rows.Count > 0)
            {
                
                dgvRx.DataSource = ds.Tables[0];
                // Console.WriteLine( dgvPatient.SelectedRows.Count);
                DataGridViewRow row = new DataGridViewRow();
                row = dgvRx.SelectedRows[0];
                string prescID = ""; 
                prescID = (row.Cells[0].Value).ToString();
                frmPrescription PrescriptionAdd = new frmPrescription(this, false);
                PrescriptionAdd.MdiParent = MdiParent;
                PrescriptionAdd.StartPosition = FormStartPosition.CenterScreen;
                PrescriptionAdd.Show();
                PrescriptionAdd.Focus();
                PrescriptionAdd.FillPrescription(prescID);
                
            }
            
        }

        private void cmuPrescriptionDelete_Click(object sender, EventArgs e)
        {
            
        }

        private void btnRxSearch_Click(object sender, EventArgs e)
        {
            string rxNum = "";
            string physID = "";
            string medID = "";
            string patID = "";


            if (txtRxPatientID.Text.Length + txtRxPrescriptionID.Text.Length + txtRxPhysicianID.Text.Length + txtRxMedicationID.Text.Length> 0)
            {

                    try
                    {

                        rxNum = txtRxPrescriptionID.Text;
                        medID = txtRxMedicationID.Text;
                        physID = txtRxPhysicianID.Text;
                        patID = txtRxPatientID.Text;

                        

                        try
                        {


                            ds = PharmacyDataTier.PrescriptionInfoSearch(rxNum, medID, physID, patID);


                            if (ds.Tables[0].Rows.Count > 0) // There is a record.
                            {
                                dgvRx.Visible = true;
                                // Get data source.
                                dgvRx.DataSource = ds.Tables[0];
                                dgvRx.AlternatingRowsDefaultCellStyle.BackColor = Color.LightGreen;

                                // Set the row and column header styles.
                                dgvRx.ColumnHeadersDefaultCellStyle.ForeColor = Color.White;
                                dgvRx.ColumnHeadersDefaultCellStyle.BackColor = Color.Green;
                            }
                            else
                            {
                                dgvPatient.Visible = false; // Hide the DataGridView if no results are found.
                                MessageBox.Show("No records found.");
                            }


                        }
                        catch (Exception exception)
                        {

                            ep1.SetError(btnMedicationSearch, "Error Searching");

                        }

                }
                catch (Exception exception)
                {

                    ep1.SetError(txtPrescriptionPatID, "Invalid Value");

                }
            }


            cmuMedicationEdit.Enabled = dgvRx.Rows.Count > 0;
            cmuMedicationDelete.Enabled = dgvRx.Rows.Count > 0;

            dgvRx.Focus();

        }

        private void txtRxPatientID_TextChanged(object sender, EventArgs e)
        {

        }

        private void cmuPrescriptionRefillThis_Click(object sender, EventArgs e)
        {
            string refillID = "";
            DateTime date = new DateTime();
            string patientID = "";
            string medicationID = "";
            string rxNum = "";
            Int32 numRefills = 0;
            Int32 pastNumRefills = 0;

            rxNum = ds.Tables[0].Rows[0]["RxNum_id"].ToString();

            try
            {
                DataSet ds = new DataSet();
                PharmacyDataTier phaDT = new PharmacyDataTier();

                ds = phaDT.NumberofRefills(rxNum);

                numRefills = Int32.Parse(ds.Tables[0].Rows[0]["numRefills"].ToString());
                pastNumRefills = Int32.Parse(ds.Tables[0].Rows[0]["pastNumRefills"].ToString());

                if (numRefills == pastNumRefills) 
                {
                    MessageBox.Show("This prescription has reached the maximum number of refills.", "Max Refill", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
                else
                {
                    refillID = PharmacyDataTier.GetNextRefillID().ToString();
                    date = DateTime.Now;
                    patientID = ds.Tables[0].Rows[0]["Patient_id"].ToString() ;
                    medicationID = ds.Tables[0].Rows[0]["Medication_id"].ToString();

                    PharmacyDataTier.AddRefill(refillID, date, patientID, medicationID, rxNum);
                    PharmacyDataTier.PastRefills(rxNum);
                }
            }
            catch (Exception exception)
            {

            }
        }

        private void dgvRx_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            
        }
    }
}