using System;
using System.Collections.Generic;
using System.Linq;
using Weee.Models.Paramemter;

namespace Weee.DAL
{

    // this class is designed for reading csv file in app_data for creating initial data in our database
    public class YearlyParameterBuilder : ParameterBuilder
    {
        private YearlyParameterCategory _category { get; set; }
        private List<YearlyParameterType> _types { get; set; }
        private List<YearlyParameterArea> _areas { get; set; }
        private List<YearlyParameter> _parameters { get; set; }
        public YearlyParameterBuilder(Categories cate)
        {
            _category = new YearlyParameterCategory() { Category = cate };
        }
        public YearlyParameterBuilder BuildTypes(List<string> TwNames, List<string> CNNames, List<string> ENNames)
        {
            if (_types == null) _types = new List<YearlyParameterType>();

            var Names = CunstructMultiNames(TwNames, CNNames, ENNames);

            foreach (var Name in Names)
            {
                var newtype = new YearlyParameterType()
                {
                    Category = _category,
                    DisplayNameTW = Name.TWName,
                    DisplayNameCN = Name.CNName,
                    DisplayNameEN = Name.ENName
                };
                _types.Add(newtype);   
            }
            _category.Types = _types;
            return this;
        }
        public YearlyParameterBuilder BuildAreas(List<string> TwNames, List<string> CNNames, List<string> ENNames)
        {
            if (_areas == null) _areas = new List<YearlyParameterArea>();

            var Names = CunstructMultiNames(TwNames, CNNames, ENNames);

            foreach (var Name in Names)
            {
                var newarea = new YearlyParameterArea()
                {
                    Category = _category,
                    DisplayNameTW = Name.TWName,
                    DisplayNameCN = Name.CNName,
                    DisplayNameEN = Name.ENName
                };
                _areas.Add(newarea);
            }
            _category.Areas = _areas;
            return this;
        }
        public YearlyParameterBuilder BuildParameters(Dictionary<int, IEnumerable<decimal?>> ToBeBuilded)
        {
            if (_areas == null || _areas.Count() == 0) throw new Exception("The Area Is Empty , please build Area first");
            if (_types == null || _types.Count() == 0) throw new Exception("The Type Is Empty , please build Type first");
            if (_parameters == null) _parameters = new List<YearlyParameter>();
            foreach (var year in ToBeBuilded.Keys)
            {
                var maxindex = ToBeBuilded[year].Count() > _areas.Count() * _types.Count() ?
                    _areas.Count() * _types.Count() :
                    ToBeBuilded[year].Count();
                for (int i = 0; i < maxindex; i++)
                {
                    var pvalue = ToBeBuilded[year].ToList()[i];
                    if (pvalue != null)
                    {
                        var toBeCreate = new YearlyParameter() { Year = year, Value = pvalue.Value };
                        toBeCreate.Area = _areas[i % _areas.Count()];
                        toBeCreate.Type = _types[i / _areas.Count()];
                        _parameters.Add(toBeCreate);
                        _areas[i % _areas.Count()].Parameters.Add(toBeCreate);
                        _types[i / _areas.Count()].Parameters.Add(toBeCreate);
                    }
                }
            }

            return this;
        }
        public YearlyParameterCategory GetResults()
        {
            return _category;
        }



       
    }
}