#region License

// Copyright 2005-2019 Paul Kohler (https://github.com/paulkohler/minisqlquery). All rights reserved.
// This source code is made available under the terms of the GNU Lesser General Public License v3.0
// https://github.com/paulkohler/minisqlquery/blob/master/LICENSE
#endregion

using System;
using System.Globalization;
using System.Text;
using MiniSqlQuery.Core;
using MiniSqlQuery.Core.DbModel;

namespace MiniSqlQuery.PlugIns.TemplateViewer
{
    /// <summary>The template host.</summary>
    public class TemplateHost : IDisposable
    {
        /// <summary>The _database inspector.</summary>
        private readonly IDatabaseInspector _databaseInspector;

        private TemplateData _data;

        /// <summary>Initializes a new instance of the <see cref="TemplateHost"/> class.</summary>
        /// <param name="applicationServices">The application services.</param>
        /// <param name="databaseInspector">The database inspector.</param>
        public TemplateHost(IApplicationServices applicationServices, IDatabaseInspector databaseInspector)
        {
            Services = applicationServices;
            _databaseInspector = databaseInspector;
        }

        /// <summary>Gets or sets Data.</summary>
        public TemplateData Data
        {
            get
            {
                if (_data == null)
                {
                    _data = Services.Resolve<TemplateData>();
                }
                return _data;
            }
            set { _data = value; }
        }

        /// <summary>Gets MachineName.</summary>
        public string MachineName
        {
            get { return Environment.MachineName; }
        }

        /// <summary>Gets Model.</summary>
        public DbModelInstance Model
        {
            get
            {
                if (_databaseInspector.DbSchema == null)
                {
                    _databaseInspector.LoadDatabaseDetails();
                }

                return _databaseInspector.DbSchema;
            }
        }

        /// <summary>Gets Services.</summary>
        public IApplicationServices Services { get; private set; }

        /// <summary>Gets UserName.</summary>
        public string UserName
        {
            get { return Environment.UserName; }
        }

        // to do - helper functions for changing names too code friendly etc

        /// <summary>The date.</summary>
        /// <param name="format">The format.</param>
        /// <returns>The date.</returns>
        public string Date(string format)
        {
            return DateTime.Now.ToString(format);
        }

        /// <summary>The to camel case.</summary>
        /// <param name="text">The text.</param>
        /// <returns>The to camel case.</returns>
        public string ToCamelCase(string text)
        {
            if (text == null)
            {
                return string.Empty;
            }

            StringBuilder sb = new StringBuilder();
            text = ToPascalCase(text);

            for (int i = 0; i < text.Length; i++)
            {
                if (Char.IsUpper(text, i))
                {
                    sb.Append(Char.ToLower(text[i]));
                }
                else
                {
                    // allows for names that start with an acronym, e.g. "ABCCode" -> "abcCode"
                    if (i > 1)
                    {
                        i--; // reverse one
                        sb.Remove(i, 1); // drop last lower cased char
                    }

                    sb.Append(text.Substring(i));
                    break;
                }
            }

            return sb.ToString();
        }

        /// <summary>The to pascal case.</summary>
        /// <param name="text">The text.</param>
        /// <returns>The to pascal case.</returns>
        public string ToPascalCase(string text)
        {
            if (text == null)
            {
                return string.Empty;
            }

            if (text.Contains(" ") || text.Contains("_"))
            {
                text = text.Replace("_", " ");
                text = CultureInfo.CurrentCulture.TextInfo.ToTitleCase(text);
                text = text.Replace(" ", string.Empty);
            }
            else if (text.Length > 1)
            {
                text = char.ToUpper(text[0]) + text.Substring(1);
            }

            return text;
        }

        /// <summary>The dispose.</summary>
        public void Dispose()
        {
            if (Data != null)
            {
                Data.Dispose();
            }
        }
    }
}