using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace Assets.Scripts.UI.Prefab.Login
{
    public static class DayOptions
    {
        private static List<Dropdown.OptionData> SetOptions(int day) 
        {
            var op = new Dropdown.OptionDataList();
            for (int m = 1; m <= day; m++)
            {
                op.options.Add(new Dropdown.OptionData(m.ToString()));
            }
            return op.options;
        }
        public static Dictionary<int, List<Dropdown.OptionData>> dayOption = new Dictionary<int, List<Dropdown.OptionData>>()
        {
            {28,SetOptions(28) },{29,SetOptions(29) },{30,SetOptions(30) },{31,SetOptions(31) }
        };
    }
    public class CountryModel 
    {
        public string country { get;set; }
        public string abbreviation { get; set; }
        public string source { get; set; }
    }
    public class LoginRegOptions
    {
        public List<Dropdown.OptionData> years;
        public List<Dropdown.OptionData> months;
        public List<Dropdown.OptionData> days;
        public List<Dropdown.OptionData> genders;
        public List<Dropdown.OptionData> countrys;
        public List<Dropdown.OptionData> units;
        public int countryDefaultValue;
        private List<CountryModel> countryList;
        public LoginRegOptions() 
        {
            years = new List<Dropdown.OptionData>();
            for (int y = 1970; y <= 2021; y++) 
            {
                years.Add(new Dropdown.OptionData(y.ToString()));
            }
            months = new List<Dropdown.OptionData>();
            for (int m = 1; m <= 12; m++)
            {
                months.Add(new Dropdown.OptionData(m.ToString()));
            }
            days = new List<Dropdown.OptionData>();
            genders = new List<Dropdown.OptionData>() {new Dropdown.OptionData("Male"), new Dropdown.OptionData("FeMale") };
            var countryJson = Resources.Load<TextAsset>("UI/flags-mini").text;
            countryList = JsonConvert.DeserializeObject<List<CountryModel>>(countryJson);
            countrys = countryList.Select(x => new Dropdown.OptionData(x.country)).ToList();
            countryDefaultValue = countryList.FindIndex(x => x.country == "中国");
            units = new List<Dropdown.OptionData>() { new Dropdown.OptionData("Metric"), new Dropdown.OptionData("Imperial") };
        }
        public Texture GetCountryImage(int index) 
        {
            var c = countryList[index];
            if (c == null) return null;
            return Resources.Load<Texture>(c.source);
        }
        public Texture GetCountryImage(string code)
        {
            return GetCountryImage(GetCountryIndexByCode(code));
        }
        public int GetCountryIndexByCode(string code)
        {
            var c = countryList.FindIndex(x => x.abbreviation.ToLower() == code.ToLower());
            if (c == -1) return countryDefaultValue;
            return c;
        }
        public List<Dropdown.OptionData> GetDayOptions(int year,int month) 
        {
            int day = DateTime.DaysInMonth(year, month);
            return DayOptions.dayOption[day];
        }
    }
}