package net.blogjava.mobile;

import java.sql.Date;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.graphics.BitmapFactory.Options;
import android.graphics.drawable.BitmapDrawable;
import android.text.style.StyleSpan;
import android.view.View;

public class Grid extends CalendarParent
{
	private String[] days = new String[42];
	private int dayColor;
	private int innerGridColor;
	private int prevNextMonthDayColor;
	private int currentDayColor;
	private float daySize;
	private float dayTopOffset;
	private float currentDaySize;

	private float cellX = -1, cellY = -1;
	private float oldCellX = -1, oldCellY = -1;

	public void setCellX(float cellX)
	{
		oldCellX = this.cellX;
		this.cellX = cellX;
	}

	public void setCellY(float cellY)
	{
		oldCellY = this.cellY;
		this.cellY = cellY;
	}

	private int getMonthDays(int year, int month)
	{
		switch (month)
		{
			case 1:
			case 3:
			case 5:
			case 7:
			case 8:
			case 10:
			case 12:
			{
				return 31;
			}
			case 4:
			case 6:
			case 9:
			case 11:
			{
				return 30;
			}
			case 2:
			{
				if (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0))
					return 29;
				else
					return 28;
			}
		}
		return 0;
	}

	public Grid(Activity activity, View view)
	{
		super(activity, view);
		dayColor = activity.getResources().getColor(R.color.day_color);
		innerGridColor = activity.getResources().getColor(
				R.color.inner_grid_color);
		prevNextMonthDayColor = activity.getResources().getColor(
				R.color.prev_next_month_day_color);
		currentDayColor = activity.getResources().getColor(
				R.color.current_day_color);
		daySize = activity.getResources().getDimension(R.dimen.day_size);
		dayTopOffset = activity.getResources().getDimension(
				R.dimen.day_top_offset);
		currentDaySize = activity.getResources().getDimension(
				R.dimen.current_day_size);
		paint.setColor(activity.getResources().getColor(R.color.border_color));
		java.util.Calendar calendar = java.util.Calendar.getInstance();
		calendar.set(calendar.get(calendar.YEAR), calendar.get(calendar.MONTH),
				1);

		int week = calendar.get(calendar.DAY_OF_WEEK);
		int currentMonth = calendar.get(calendar.MONTH);
		int monthDays = 0;
		int prevMonthDays = 0;
		int nextMonthDays = 0;
		monthDays = getMonthDays(calendar.get(calendar.YEAR), currentMonth);
		if (currentMonth == 0)
			prevMonthDays = getMonthDays(calendar.get(calendar.YEAR) - 1, 11);
		else
			prevMonthDays = getMonthDays(calendar.get(calendar.YEAR),
					currentMonth - 1);

		if (currentMonth == 11)
			nextMonthDays = getMonthDays(calendar.get(calendar.YEAR) + 1, 0);
		else
			prevMonthDays = getMonthDays(calendar.get(calendar.YEAR),
					currentMonth + 1);

		for (int i = week, day = prevMonthDays; i > 1; i--, day--)
		{
			days[i - 2] = "*" + String.valueOf(day);
		}
		for (int day = 1, i = week - 1; day <= monthDays; day++, i++)
		{
			days[i] = String.valueOf(day);
		}
		for (int i = week + monthDays - 1, day = 1; i < days.length; i++, day++)
		{
			days[i] = "*" + String.valueOf(day);
		}

	}

	private boolean isCurrentDay(int dayIndex, int currentDayIndex,
			Rect cellRect)
	{

		if (cellX != -1 && cellY != -1)
		{
			if (cellX > cellRect.left && cellX < cellRect.right
					&& cellY > cellRect.top && cellY < cellRect.bottom)
			{
				return true;
			}
			else
			{
				return false;
			}
		}
		else
		{
			return dayIndex == currentDayIndex;
		}
	}

	@Override
	public void draw(Canvas canvas)
	{
		float left = borderMargin;
		float top = borderMargin + weekNameSize + weekNameMargin * 2 + 4;
		float calendarWidth = view.getMeasuredWidth() - borderMargin * 2;
		float calendarHeight = view.getMeasuredHeight() - top;
		float cellWidth = calendarWidth / 7;
		float cellHeight = calendarHeight / 6;
		paint.setColor(innerGridColor);
		canvas.drawLine(left, top, left + view.getMeasuredWidth()
				- borderMargin * 2, top, paint);
		// »­ºáÏß
		for (int i = 1; i < 6; i++)
		{
			canvas.drawLine(left, top + (cellHeight - 1) * i, left
					+ calendarWidth, top + (cellHeight - 1) * i, paint);
		}
		// »­ÊúÏß
		for (int i = 1; i < 7; i++)
		{
			canvas.drawLine(left + cellWidth * i, top, left + cellWidth * i,
					view.getMeasuredHeight() - borderMargin, paint);
		}

		// »­ÈÕÆÚ
		if (cellX < borderMargin
				|| cellX > (view.getMeasuredWidth() - borderMargin)
				|| cellY < top
				|| cellY > (view.getMeasuredHeight() - borderMargin))
		{
			cellX = oldCellX;
			cellY = oldCellY;
		}

		java.util.Calendar calendar = java.util.Calendar.getInstance();
		int day = calendar.get(calendar.DATE);
		calendar.set(calendar.get(calendar.YEAR), calendar.get(calendar.MONTH),
				1);
		int week = calendar.get(calendar.DAY_OF_WEEK);
		int currentDayIndex = week + day - 2;
		boolean flag = false;
		for (int i = 0; i < days.length; i++)
		{
			int row = i / 7;
			int col = i % 7;
			String text = String.valueOf(days[i]);
			if (text.startsWith("*"))
			{

				paint.setColor(prevNextMonthDayColor);
			}
			else
			{
				paint.setColor(dayColor);
			}
			text = text.startsWith("*") ? text.substring(1) : text;

			Rect dst = new Rect();
			dst.left = (int) (left + cellWidth * col);
			dst.top = (int) (top + (cellHeight - 1) * row);
			dst.bottom = (int) (dst.top + cellHeight);
			dst.right = (int) (dst.left + cellWidth + 2);

			paint.setTextSize(daySize);
			float textLeft = left + cellWidth * col
					+ (cellWidth - paint.measureText(text)) / 2;
			float textTop = top + (cellHeight - 1) * row
					+ (cellHeight - paint.getTextSize()) / 2 + dayTopOffset;
			if (isCurrentDay(i, currentDayIndex, dst) && flag == false)
			{
				paint.setTextSize(currentDaySize);
				flag = true;
				Bitmap bitmap = BitmapFactory.decodeResource(activity
						.getResources(), R.drawable.day);
				Rect src = new Rect();
				src.left = 0;
				src.top = 0;
				src.right = bitmap.getWidth();
				src.bottom = bitmap.getHeight();
				canvas.drawBitmap(bitmap, src, dst, paint);
				paint.setColor(currentDayColor);

			}

			canvas.drawText(text, textLeft, textTop, paint);

		}

	}

}
