package com.example.app_test;
    import android.app.Activity;
    import android.content.Context;
    import android.content.Intent;
    import android.content.SharedPreferences;
    import android.content.SharedPreferences.Editor;
    import android.os.Bundle;
    import android.text.Editable;
    import android.text.TextWatcher;
    import android.view.View;
    import android.view.Window;
    import android.widget.Button;
    import android.widget.CheckBox;
    import android.widget.EditText;
    import android.widget.Toast;
    import java.util.regex.Matcher;
    import java.util.regex.Pattern;
    public class MainActivity extends Activity {
    private EditText user = null;
    private EditText pass = null;
    private Button button_back = null;
    private Button button_login = null;
    private Button button_register = null;
    private CheckBox remember = null;
    private CheckBox autologin = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.main_activity);
        
        //setContentView(R.layout.activity_login);
        button_back = (Button)findViewById(R.id.button_back);
        button_login = (Button)findViewById(R.id.button_login);
        button_register = (Button)findViewById(R.id.button_register);
        user =(EditText)findViewById(R.id.user);
        pass = (EditText)findViewById(R.id.pass);
        remember = (CheckBox)findViewById(R.id.remember);
        autologin = (CheckBox)findViewById(R.id.autologin);
        Context context = MainActivity.this;
        SharedPreferences sp = context.getSharedPreferences("Login", MODE_PRIVATE);
        String user_from_file = sp.getString("user", "");
        String pass_from_file = sp.getString("pass", "");
        System.out.println(user_from_file);
        user.addTextChangedListener(Watchertext);
        boolean passremberb = sp.getBoolean("remember",false);
        boolean autologinb = sp.getBoolean("autologin",false);
        if(user_from_file!=null && passremberb)
            user.setText(user_from_file);
        user.setText(user_from_file);
        if(pass_from_file!=null && passremberb) {
            pass.setText(pass_from_file);
            if(autologinb)
                autologin.setChecked(true);
        }
        if(passremberb)
            remember.setChecked(true);
        if(autologinb){
            LoginNow(button_login);
        }
        
    }
    TextWatcher Watchertext = new TextWatcher() {
        private CharSequence temp;
        private int editStart;
        private int editEnd;
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            //user.setText(s);
        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            temp =s;
        }

        @Override
        public void afterTextChanged(Editable s) {
            editStart = user.getSelectionStart();
            editEnd = user.getSelectionEnd();
            if(!isLetterOrDigit(temp.toString())){
                Toast.makeText(MainActivity.this,"username is Letter or Digit or _ !",Toast.LENGTH_SHORT).show();

            }
            if(temp.length() > 10)
            {
                Toast.makeText(MainActivity.this,"too long for user name !",Toast.LENGTH_SHORT).show();
                s.delete(editStart-1,editEnd);
                int tempSeleciton = editStart;
                user.setSelection(tempSeleciton);
            }
        }
    };
    
    public void LoginNow(final View view){
        String userString = user.getText().toString();
        String passString = pass.getText().toString();

        if(isLetterOrDigit(userString))
            System.out.println();
        else {
            Intent intent = new Intent(MainActivity.this,MainActivity.class);
            startActivity(intent);
            this.finish();
        }
        if(isLetterDigit(passString))
            System.out.println();
        else{
            Intent intent = new Intent(MainActivity.this,MainActivity.class);
            startActivity(intent);
            this.finish();
        }


        Context context = MainActivity.this;
        SharedPreferences sp = context.getSharedPreferences("Login", MODE_PRIVATE);
        Editor editor = sp.edit();
        if(remember.isChecked())
            editor.putBoolean("remember",true);
        else
            editor.putBoolean("remember",false);
        if(autologin.isChecked())
            editor.putBoolean("autologin",true);
        else
            editor.putBoolean("autologin",false);
        editor.putString("user", userString);
        editor.putString("pass",passString);

        editor.commit();
        Bundle bundle = new Bundle();
        Intent toRegister = new Intent(MainActivity.this,LoginNow.class);
        bundle.putString("user", userString);
        bundle.putString("pass", passString);
        toRegister.putExtras(bundle);
        startActivity(toRegister); 
        this.finish();
    }
    public void RegisterNow(View view){
        
        Intent toRegister = new Intent(MainActivity.this,RegisterNow.class);
        startActivity(toRegister); 
        
    }
    public void Back(View view){
        super.onBackPressed();
        this.finish();
    }



    /**
     * 规则1：至少包含大小写字母及数字中的一种
     * 是否包含
     *
     * @param str
     * @return
     */
    public static boolean isLetterOrDigit(String str) {
        boolean isLetterOrDigit = false;//定义一个boolean值，用来表示是否包含字母或数字
        for (int i = 0; i < str.length(); i++) {
            if (Character.isLetterOrDigit(str.charAt(i))) {   //用char包装类中的判断数字的方法判断每一个字符
                isLetterOrDigit = true;
            }
        }
        String regex = "^[a-zA-Z0-9]+$";
        boolean isRight = isLetterOrDigit && str.matches(regex);
        return isRight;
    }

    /**
     * 规则2：至少包含大小写字母及数字中的两种
     * 是否包含
     *
     * @param str
     * @return
     */
    public static boolean isLetterDigit(String str) {
        boolean isDigit = false;//定义一个boolean值，用来表示是否包含数字
        boolean isLetter = false;//定义一个boolean值，用来表示是否包含字母
        for (int i = 0; i < str.length(); i++) {
            if (Character.isDigit(str.charAt(i))) {   //用char包装类中的判断数字的方法判断每一个字符
                isDigit = true;
            } else if (Character.isLetter(str.charAt(i))) {  //用char包装类中的判断字母的方法判断每一个字符
                isLetter = true;
            }
        }
        String regex = "^[a-zA-Z0-9]+$";
        boolean isRight = isDigit && isLetter && str.matches(regex);
        return isRight;
    }

    /**
     * 规则3：必须同时包含大小写字母及数字
     * 是否包含
     *
     * @param str
     * @return
     */
    public static boolean isContainAll(String str) {
        boolean isDigit = false;//定义一个boolean值，用来表示是否包含数字
        boolean isLowerCase = false;//定义一个boolean值，用来表示是否包含字母
        boolean isUpperCase = false;
        for (int i = 0; i < str.length(); i++) {
            if (Character.isDigit(str.charAt(i))) {   //用char包装类中的判断数字的方法判断每一个字符
                isDigit = true;
            } else if (Character.isLowerCase(str.charAt(i))) {  //用char包装类中的判断字母的方法判断每一个字符
                isLowerCase = true;
            } else if (Character.isUpperCase(str.charAt(i))) {
                isUpperCase = true;
            }
        }
        String regex = "^[a-zA-Z0-9]+$";
        boolean isRight = isDigit && isLowerCase && isUpperCase && str.matches(regex);
        return isRight;
    }

    /**
     *   判断EditText输入的数字、中文还是字母方法
     */
    public static void whatIsInput(Context context, EditText edInput) {
        String txt = edInput.getText().toString();

        Pattern p = Pattern.compile("[0-9]*");
        Matcher m = p.matcher(txt);
        if (m.matches()) {
            Toast.makeText(context, "输入的是数字", Toast.LENGTH_SHORT).show();
        }
        p = Pattern.compile("[a-zA-Z]");
        m = p.matcher(txt);
        if (m.matches()) {
            Toast.makeText(context, "输入的是字母", Toast.LENGTH_SHORT).show();
        }
        p = Pattern.compile("[\u4e00-\u9fa5]");
        m = p.matcher(txt);
        if (m.matches()) {
            Toast.makeText(context, "输入的是汉字", Toast.LENGTH_SHORT).show();
        }
    }
}