using Microsoft.Office.Interop.Word;
/* Importer.cs
 * part of zaaReloaded2
 * 
 * Copyright 2015 Daniel Kraus
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace zaaReloaded2.Medication
{
    /// <summary>
    /// Imports prescriptions from a physician's letter.
    /// </summary>
    public class Importer
    {
        #region Static methods

        /// <summary>
        /// Attempts to automatically detect a block of prescriptions
        /// in a document. The document is screened from end to start.
        /// The detected block is selected.
        /// </summary>
        /// <returns>True if a block was detected, false if not.</returns>
        public static bool AutoDetect(Document document)
        {
            Paragraph start = null;
            Paragraph end = null;
            int i = document.Paragraphs.Count;

            while (i > 1)
            {
                string line = document.Paragraphs[i].Range.Text;
                if (Prescription.IsPrescriptionLine(line))
                {
                    end = document.Paragraphs[i];
                    break;
                }
                i--;
            }

            if (end != null)
            {
                start = end;
                while (i > 2)
                {
                    if (!Prescription.IsPrescriptionLine(document.Paragraphs[i - 1].Range.Text))
                    {
                        start = document.Paragraphs[i];
                        break;
                    }
                    i--;
                }

                document.Range(start.Range.Start, end.Range.End).Select();
                return true;
            }
            return false;
        }

        #endregion

        #region Properties

        public List<Prescription> Prescriptions { get; protected set; }

        #endregion

        #region Constructor

        public Importer() { }

        public Importer(string text)
            : this()
        {
            Import(text);
        }

        #endregion

        #region Private methods

        protected virtual void Import(string text)
        {
            Prescriptions = new List<Prescription>();
            string[] lines = Helpers.SplitParagraphs(text);
            foreach (string line in lines)
            {
                if (Prescription.IsPrescriptionLine(line))
                {
                    Prescriptions.AddRange(Prescription.ManyFromLine(line));
                }
            }
        }
        
        #endregion
    }
}