package <%= java_package %>;

import android.app.Activity;
import android.graphics.Color;
import android.graphics.Typeface;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import android.widget.TextView;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicReference;

/**
 * Java-side UI bridge. All methods are called from BEAM scheduler threads
 * and dispatched to the main thread synchronously via CountDownLatch.
 *
 * Called from mob_nif.c.
 */
public class MobBridge {

    static Activity sActivity;
    private static final String TAG = "<%= display_name %>";

    public static void init(Activity a) {
        sActivity = a;
    }

    static void runOnUI(Runnable r) {
        if (sActivity == null) {
            android.util.Log.e(TAG, "runOnUI: sActivity is null — MobBridge.init() not called yet");
            return;
        }
        if (sActivity.getMainLooper().getThread() == Thread.currentThread()) {
            r.run();
            return;
        }
        CountDownLatch latch = new CountDownLatch(1);
        sActivity.runOnUiThread(() -> {
            try {
                r.run();
            } catch (Throwable e) {
                android.util.Log.e(TAG, "runOnUI threw: " + e, e);
            } finally {
                latch.countDown();
            }
        });
        try { latch.await(); } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }

    public static View createColumn() {
        AtomicReference<View> out = new AtomicReference<>();
        runOnUI(() -> {
            LinearLayout ll = new LinearLayout(sActivity);
            ll.setOrientation(LinearLayout.VERTICAL);
            ll.setLayoutParams(new LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT));
            out.set(ll);
        });
        return out.get();
    }

    public static View createRow() {
        AtomicReference<View> out = new AtomicReference<>();
        runOnUI(() -> {
            LinearLayout ll = new LinearLayout(sActivity);
            ll.setOrientation(LinearLayout.HORIZONTAL);
            ll.setGravity(Gravity.CENTER_VERTICAL);
            ll.setLayoutParams(new LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT));
            out.set(ll);
        });
        return out.get();
    }

    public static View createLabel(String text) {
        AtomicReference<View> out = new AtomicReference<>();
        runOnUI(() -> {
            TextView tv = new TextView(sActivity);
            tv.setText(text);
            tv.setTextColor(Color.BLACK);
            tv.setTextSize(TypedValue.COMPLEX_UNIT_SP, 16f);
            tv.setPadding(8, 8, 8, 8);
            tv.setLayoutParams(new LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT));
            out.set(tv);
        });
        return out.get();
    }

    public static View createButton(String text) {
        AtomicReference<View> out = new AtomicReference<>();
        runOnUI(() -> {
            Button btn = new Button(sActivity);
            btn.setText(text);
            btn.setTextSize(TypedValue.COMPLEX_UNIT_SP, 15f);
            btn.setLayoutParams(new LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT));
            out.set(btn);
        });
        return out.get();
    }

    public static View createScrollView() {
        AtomicReference<View> out = new AtomicReference<>();
        runOnUI(() -> {
            LinearLayout inner = new LinearLayout(sActivity);
            inner.setOrientation(LinearLayout.VERTICAL);
            inner.setLayoutParams(new LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT));

            ScrollView sv = new ScrollView(sActivity);
            sv.setLayoutParams(new LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                0, 1.0f));
            sv.addView(inner);
            sv.setTag(inner);
            out.set(sv);
        });
        return out.get();
    }

    public static void addChild(View parent, View child, boolean parentIsRow) {
        runOnUI(() -> {
            if (child.getParent() instanceof ViewGroup) {
                ((ViewGroup) child.getParent()).removeView(child);
            }
            LinearLayout.LayoutParams lp;
            if (parentIsRow) {
                lp = new LinearLayout.LayoutParams(0,
                    ViewGroup.LayoutParams.WRAP_CONTENT, 1.0f);
            } else {
                lp = new LinearLayout.LayoutParams(
                    ViewGroup.LayoutParams.MATCH_PARENT,
                    ViewGroup.LayoutParams.WRAP_CONTENT);
            }
            child.setLayoutParams(lp);
            ((ViewGroup) parent).addView(child);
        });
    }

    public static void removeChild(View child) {
        runOnUI(() -> {
            if (child.getParent() instanceof ViewGroup) {
                ((ViewGroup) child.getParent()).removeView(child);
            }
        });
    }

    public static void setText(View view, String text) {
        runOnUI(() -> {
            if (view instanceof TextView) ((TextView) view).setText(text);
        });
    }

    public static void setTextSize(View view, float sp) {
        runOnUI(() -> {
            if (view instanceof TextView)
                ((TextView) view).setTextSize(TypedValue.COMPLEX_UNIT_SP, sp);
        });
    }

    public static void setTextColor(View view, int argb) {
        runOnUI(() -> {
            if (view instanceof TextView) ((TextView) view).setTextColor(argb);
        });
    }

    public static void setBackgroundColor(View view, int argb) {
        runOnUI(() -> view.setBackgroundColor(argb));
    }

    public static void setPadding(View view, int dp) {
        runOnUI(() -> {
            float d = sActivity.getResources().getDisplayMetrics().density;
            int px = (int)(dp * d + 0.5f);
            view.setPadding(px, px, px, px);
        });
    }

    public static void setOnTapListener(View view, long resourcePtr) {
        runOnUI(() -> view.setOnClickListener(new MobTapListener(resourcePtr)));
    }

    public static void setRoot(View view) {
        android.util.Log.i(TAG, "setRoot — setting content view");
        runOnUI(() -> sActivity.setContentView(view));
        android.util.Log.i(TAG, "setRoot — done");
    }

    public static View getTag(View view) {
        AtomicReference<View> out = new AtomicReference<>();
        runOnUI(() -> {
            Object tag = view.getTag();
            if (tag instanceof View) out.set((View) tag);
        });
        return out.get();
    }
}