package vn.kienutt.farm;

import android.app.Activity;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

public final class FarmActivity extends Activity {
  private FarmCore farm;
  private TextView status, message;
  private PlotView plots;
  private int selected = 0;
  private final Handler timer = new Handler(Looper.getMainLooper());
  private final Runnable tick =
      new Runnable() {
        public void run() {
          farm.tick(System.currentTimeMillis());
          refresh();
          timer.postDelayed(this, 1000);
        }
      };

  private int dp(int n) {
    return (int) (n * getResources().getDisplayMetrics().density + .5f);
  }

  @Override
  public void onCreate(Bundle state) {
    super.onCreate(state);
    String data =
        state != null
            ? state.getString("farm")
            : getPreferences(MODE_PRIVATE).getString("farm", null);
    try {
      farm = data == null ? new FarmCore(System.currentTimeMillis()) : FarmCore.restore(data);
    } catch (RuntimeException e) {
      farm = new FarmCore(System.currentTimeMillis());
    }
    if (state != null) selected = state.getInt("selected", 0);
    LinearLayout root = new LinearLayout(this);
    root.setOrientation(LinearLayout.VERTICAL);
    root.setBackgroundColor(Color.rgb(238, 246, 230));
    root.setOnApplyWindowInsetsListener(
        (v, i) -> {
          v.setPadding(
              dp(12) + i.getSystemWindowInsetLeft(),
              dp(8) + i.getSystemWindowInsetTop(),
              dp(12) + i.getSystemWindowInsetRight(),
              dp(8) + i.getSystemWindowInsetBottom());
          return i;
        });
    TextView title = new TextView(this);
    title.setText("Nông trại nhỏ · Android Java");
    title.setTextSize(23);
    root.addView(title);
    status = new TextView(this);
    status.setTextSize(17);
    root.addView(status);
    plots = new PlotView();
    root.addView(plots, new LinearLayout.LayoutParams(-1, 0, 1));
    for (String[] row :
        new String[][] {
          {"Cà rốt · 3 xu / 30 giây", "Ngô · 5 xu / 60 giây"}, {"Tưới cây", "Thu hoạch"}
        }) {
      LinearLayout line = new LinearLayout(this);
      for (String label : row) {
        Button b = new Button(this);
        b.setText(label);
        b.setOnClickListener(
            v -> {
              long now = System.currentTimeMillis();
              String result =
                  label.startsWith("Cà")
                      ? farm.sow(selected, 1, now)
                      : label.startsWith("Ngô")
                          ? farm.sow(selected, 2, now)
                          : label.startsWith("Tưới")
                              ? farm.water(selected, now)
                              : farm.harvest(selected, now);
              message.setText(result);
              save();
              refresh();
            });
        line.addView(b, new LinearLayout.LayoutParams(0, -2, 1));
      }
      root.addView(line);
    }
    message = new TextView(this);
    message.setText("Chạm ô đất, gieo hạt, tưới rồi chờ cây chín. Mỗi 10 giây hồi 1 năng lượng.");
    root.addView(message);
    setContentView(root);
    refresh();
  }

  private void save() {
    getPreferences(MODE_PRIVATE).edit().putString("farm", farm.encode()).apply();
  }

  private void refresh() {
    status.setText(
        farm.coins() + " xu · " + farm.energy() + "/20 năng lượng · Ô " + (selected + 1));
    plots.invalidate();
  }

  @Override
  public void onResume() {
    super.onResume();
    timer.post(tick);
  }

  @Override
  public void onPause() {
    timer.removeCallbacks(tick);
    save();
    super.onPause();
  }

  @Override
  public void onSaveInstanceState(Bundle b) {
    b.putString("farm", farm.encode());
    b.putInt("selected", selected);
    super.onSaveInstanceState(b);
  }

  private final class PlotView extends View {
    private final Paint p = new Paint(Paint.ANTI_ALIAS_FLAG);
    private float cell, left, top;

    PlotView() {
      super(FarmActivity.this);
      setContentDescription("12 ô đất. Chạm để chọn ô trồng cây.");
    }

    @Override
    protected void onDraw(Canvas c) {
      super.onDraw(c);
      cell = Math.min(getWidth() / 4f, getHeight() / 3f);
      left = (getWidth() - cell * 4) / 2;
      top = (getHeight() - cell * 3) / 2;
      long now = System.currentTimeMillis();
      p.setTextAlign(Paint.Align.CENTER);
      for (int i = 0; i < 12; i++) {
        float x = left + (i % 4) * cell, y = top + (i / 4) * cell;
        p.setColor(i == selected ? Color.rgb(35, 126, 83) : Color.rgb(125, 80, 48));
        c.drawRoundRect(x + 4, y + 4, x + cell - 4, y + cell - 4, dp(10), dp(10), p);
        p.setColor(Color.WHITE);
        p.setTextSize(cell * .15f);
        c.drawText("Ô " + (i + 1), x + cell / 2, y + cell * .21f, p);
        int kind = farm.crop(i);
        if (kind == 0) {
          c.drawText("Đất trống", x + cell / 2, y + cell * .58f, p);
          continue;
        }
        double progress = farm.progress(i, now);
        p.setColor(kind == 1 ? Color.rgb(255, 166, 61) : Color.rgb(245, 222, 74));
        float rad = (float) (cell * (.1 + .11 * progress));
        c.drawCircle(x + cell / 2, y + cell * .5f, rad, p);
        p.setColor(Color.WHITE);
        c.drawText(
            farm.ready(i, now) ? "Thu hoạch!" : farm.watered(i) ? "Đã tưới" : "Cần tưới",
            x + cell / 2,
            y + cell * .8f,
            p);
        p.setColor(Color.rgb(69, 174, 113));
        c.drawRect(
            x + cell * .1f,
            y + cell * .87f,
            (float) (x + cell * .1f + cell * .8f * progress),
            y + cell * .92f,
            p);
      }
    }

    @Override
    public boolean onTouchEvent(MotionEvent e) {
      if (e.getAction() != MotionEvent.ACTION_UP) return true;
      performClick();
      int col = (int) Math.floor((e.getX() - left) / cell),
          row = (int) Math.floor((e.getY() - top) / cell);
      if (col >= 0 && col < 4 && row >= 0 && row < 3) {
        selected = row * 4 + col;
        refresh();
      }
      return true;
    }

    @Override
    public boolean performClick() {
      super.performClick();
      return true;
    }
  }
}