using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace PostalCode
{
	/// <summary>
	/// 郵便番号検索
	/// </summary>
	public class WebForm1 : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.ValidationSummary ValidationSummary1;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
		protected System.Web.UI.WebControls.TextBox code;
		protected System.Web.UI.WebControls.Button searchBtn;
		protected System.Web.UI.WebControls.DropDownList candList;
		protected System.Web.UI.WebControls.DropDownList prefList;
		protected System.Web.UI.WebControls.Label address;
		protected System.Web.UI.WebControls.ListBox cityList;
		protected System.Web.UI.WebControls.ListBox townList;
		protected System.Web.UI.WebControls.RangeValidator RangeValidator1;
		private void ShowAddress()
		{
			address.Text = prefList.SelectedItem.Text;
			if (cityList.SelectedItem != null) address.Text += cityList.SelectedItem.Text;
			if (townList.SelectedItem != null) address.Text += townList.SelectedItem.Text;
			code.Enabled = true;
			candList.Visible = false;
		}
		private void SetList(int no)
		{
			PostData pd = PostData.Instance(Server);
			ArrayList a = pd.GetTownData(int.Parse(code.Text));
			if (a == null) 
			{
				address.Text = "無効な番号です";
				return;
			}
			TownData tw = (TownData)a[no];
			CityData ct = tw.Parent;
			PrefData pf = ct.Parent;
			prefList.SelectedIndex = pf.ID;
			prefList_SelectedIndexChanged(null,null);
			cityList.SelectedIndex = ct.ID;
			cityList_SelectedIndexChanged(null,null);
			townList.SelectedIndex = tw.ID;
			townList_SelectedIndexChanged(null,null);
			if (a.Count == 1) return;
			code.Enabled = false;
			candList.Visible = true;
			candList.Items.Clear();
			candList.Items.Add("やり直す");
			foreach (TownData t in a) 
				candList.Items.Add(t.Parent.Value + t.Value);
			candList.SelectedIndex = no+1;
		}
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// ページを初期化するユーザー コードをここに挿入します。
			if (IsPostBack) return;
			PostData pd = PostData.Instance(Server);
			for (int i=0;i<47;++i) prefList.Items.Add(pd[i].Value);
			prefList.SelectedIndex = 12;
			prefList_SelectedIndexChanged(null,null);
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: この呼び出しは、ASP.NET Web フォーム デザイナで必要です。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Designer サポートに必要なメソッドです。コード エディタで
		/// このメソッドのコンテンツを変更しないでください。
		/// </summary>
		private void InitializeComponent()
		{    
			this.code.TextChanged += new System.EventHandler(this.searchBtn_Click);
			this.searchBtn.Click += new System.EventHandler(this.searchBtn_Click);
			this.candList.SelectedIndexChanged += new System.EventHandler(this.candList_SelectedIndexChanged);
			this.prefList.SelectedIndexChanged += new System.EventHandler(this.prefList_SelectedIndexChanged);
			this.cityList.SelectedIndexChanged += new System.EventHandler(this.cityList_SelectedIndexChanged);
			this.townList.SelectedIndexChanged += new System.EventHandler(this.townList_SelectedIndexChanged);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void prefList_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			PostData pd = PostData.Instance(Server);
			PrefData pf = pd[prefList.SelectedIndex];
			cityList.Items.Clear();
			townList.Items.Clear();
			foreach (CityData ct in pf.List) cityList.Items.Add(ct.Value);
			ShowAddress();
		}

		private void cityList_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			PostData pd = PostData.Instance(Server);
			PrefData pf = pd[prefList.SelectedIndex];
			CityData ct = (CityData)pf.List[cityList.SelectedIndex];
			townList.Items.Clear();
			foreach (TownData tw in ct.List) townList.Items.Add(tw.Value);
			ShowAddress();
		}

		private void townList_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			PostData pd = PostData.Instance(Server);
			PrefData pf = pd[prefList.SelectedIndex];
			CityData ct = (CityData)pf.List[cityList.SelectedIndex];
			TownData tw = (TownData)ct.List[townList.SelectedIndex];
			code.Text = tw.Code.ToString();
			ShowAddress();
		}

		private void searchBtn_Click(object sender, System.EventArgs e)
		{
			SetList(0);
		}

		private void candList_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			if (candList.SelectedIndex == 0) 
			{
				ShowAddress();
				return;
			}
			SetList(candList.SelectedIndex-1);
		}
	}
}