using UnityEngine;
using System;
using System.Collections.Generic;

namespace PixelCrushers.DialogueSystem
{

    /// <summary>
    /// Deprecated by PixelCrushers.Common.TextTable.
    /// 
    /// An asset containing a table of localized text. You can create a localized
    /// text table asset using the Assets > Create > Dialogue System menu or by
    /// right-clicking in the Project view.
    /// </summary>
    [AddComponentMenu("")] // Deprecated
    public class LocalizedTextTable : ScriptableObject
    {

        [Serializable]
        public class LocalizedTextField
        {
            public string name = string.Empty;
            public List<string> values = new List<string>();
        }

        /// <summary>
        /// The languages in the table.
        /// </summary>
        public List<string> languages = new List<string>();

        /// <summary>
        /// The fields that have localized text.
        /// </summary>
        public List<LocalizedTextField> fields = new List<LocalizedTextField>();

        private const int LanguageNotFound = -1;

        /// <summary>
        /// Gets the localized text for a field using the current language.
        /// </summary>
        /// <param name="fieldName">Field name.</param>
        public string this[string fieldName]
        {
            get { return GetText(fieldName); }
        }

        /// <summary>
        /// Determines whether the table contains a field.
        /// </summary>
        /// <returns><c>true</c>, if the field is in the table, <c>false</c> otherwise.</returns>
        /// <param name="fieldName">Field name.</param>
        public bool ContainsField(string fieldName)
        {
            return (fields.Find(f => string.Equals(f.name, fieldName)) != null);
        }

        private string GetText(string fieldName)
        {
            return GetTextInLanguage(fieldName, GetLanguageIndex());
        }

        private string GetTextInLanguage(string fieldName, int languageIndex)
        {
            if (languageIndex != LanguageNotFound)
            {
                foreach (var field in fields)
                {
                    if (string.Equals(field.name, fieldName))
                    {
                        if ((languageIndex < field.values.Count) && !string.IsNullOrEmpty(field.values[languageIndex]))
                        {
                            return field.values[languageIndex];
                        }
                        else
                        {
                            return (Localization.useDefaultIfUndefined && field.values.Count > 0) ? field.values[0] : string.Empty;
                        }
                    }
                }
            }
            return (Localization.useDefaultIfUndefined && languageIndex > 0) ? GetTextInLanguage(fieldName, 0) : string.Empty;
        }

        private int GetLanguageIndex()
        {
            if (Localization.isDefaultLanguage) return 0;
            for (int i = 0; i < languages.Count; i++)
            {
                if (string.Equals(languages[i], Localization.language))
                {
                    return i;
                }
            }
            return LanguageNotFound;
        }

    }

}