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// Copyright 2012 Square, Inc.
package com.squareup.timessquare;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;

import static android.view.View.MeasureSpec.AT_MOST;
import static android.view.View.MeasureSpec.EXACTLY;
import static android.view.View.MeasureSpec.makeMeasureSpec;

/** TableRow that draws a divider between each cell. To be used with {@link CalendarGridView}. */
public class CalendarRowView extends ViewGroup implements View.OnClickListener {
  private boolean isHeaderRow;
  private MonthView.Listener listener;
  private int cellSize;
  private int oldWidthMeasureSpec;
  private int oldHeightMeasureSpec;

  public CalendarRowView(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  @Override public void addView(View child, int index, ViewGroup.LayoutParams params) {
    child.setOnClickListener(this);
    super.addView(child, index, params);
  }

  @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    if (oldWidthMeasureSpec == widthMeasureSpec && oldHeightMeasureSpec == heightMeasureSpec) {
      Logr.d("SKIP Row.onMeasure");
      setMeasuredDimension(getMeasuredWidth(), getMeasuredHeight());
      return;
    }

    long start = System.currentTimeMillis();
    final int totalWidth = MeasureSpec.getSize(widthMeasureSpec);
    cellSize = totalWidth / 7;
    int cellWidthSpec = makeMeasureSpec(cellSize, EXACTLY);
    int cellHeightSpec = isHeaderRow ? makeMeasureSpec(cellSize, AT_MOST) : cellWidthSpec;
    int rowHeight = 0;
    for (int c = 0, numChildren = getChildCount(); c < numChildren; c++) {
      final View child = getChildAt(c);
      child.measure(cellWidthSpec, cellHeightSpec);
      // The row height is the height of the tallest cell.
      if (child.getMeasuredHeight() > rowHeight) {
        rowHeight = child.getMeasuredHeight();
      }
    }
    final int widthWithPadding = totalWidth + getPaddingLeft() + getPaddingRight();
    final int heightWithPadding = rowHeight + getPaddingTop() + getPaddingBottom();
    setMeasuredDimension(widthWithPadding, heightWithPadding);
    Logr.d("Row.onMeasure %d ms", System.currentTimeMillis() - start);
    oldWidthMeasureSpec = widthMeasureSpec;
    oldHeightMeasureSpec = heightMeasureSpec;
  }

  @Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
    long start = System.currentTimeMillis();
    int cellHeight = bottom - top;
    for (int c = 0, numChildren = getChildCount(); c < numChildren; c++) {
      final View child = getChildAt(c);
      child.layout(c * cellSize, 0, (c + 1) * cellSize, cellHeight);
    }
    Logr.d("Row.onLayout %d ms", System.currentTimeMillis() - start);
  }

  public void setIsHeaderRow(boolean isHeaderRow) {
    this.isHeaderRow = isHeaderRow;
  }

  @Override public void onClick(View v) {
    // Header rows don't have a click listener
    if (listener != null) {
      listener.handleClick((MonthCellDescriptor) v.getTag());
    }
  }

  public void setListener(MonthView.Listener listener) {
    this.listener = listener;
  }
}