package vn.utt.sotay;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

public final class CourseFlow {
    private static final String EXTRA_COURSE_ID = "vn.utt.sotay.COURSE_ID";
    private static final String[][] COURSES = {
        {"CTDL01", "Cấu trúc dữ liệu và giải thuật"},
        {"KTPM01", "Kiểm thử phần mềm"}
    };

    private static LinearLayout column(Activity screen) {
        LinearLayout layout = new LinearLayout(screen);
        layout.setOrientation(LinearLayout.VERTICAL);
        int padding = Math.round(20 * screen.getResources().getDisplayMetrics().density);
        layout.setPadding(padding, padding, padding, padding);
        return layout;
    }

    public static class ListActivity extends Activity {
        @Override
        protected void onCreate(Bundle state) {
            super.onCreate(state);
            LinearLayout layout = column(this);
            TextView title = new TextView(this);
            title.setText("Chọn học phần");
            title.setTextSize(22);
            layout.addView(title);

            for (String[] course : COURSES) {
                Button button = new Button(this);
                button.setText(course[1]);
                button.setOnClickListener(view -> {
                    Intent intent = new Intent(this, DetailActivity.class);
                    intent.putExtra(EXTRA_COURSE_ID, course[0]);
                    startActivity(intent);
                });
                layout.addView(button);
            }
            setContentView(layout);
        }
    }

    public static class DetailActivity extends Activity {
        @Override
        protected void onCreate(Bundle state) {
            super.onCreate(state);
            String code = getIntent().getStringExtra(EXTRA_COURSE_ID);
            String name = "Không tìm thấy học phần";
            for (String[] course : COURSES) {
                if (course[0].equals(code)) {
                    name = course[1];
                    break;
                }
            }

            LinearLayout layout = column(this);
            TextView title = new TextView(this);
            title.setText(name);
            title.setTextSize(22);
            layout.addView(title);

            Button back = new Button(this);
            back.setText("Quay lại danh sách");
            back.setOnClickListener(view -> finish());
            layout.addView(back);
            setContentView(layout);
        }
    }
}