package de.thedevstack.conversationsplus.utils.ui;

import android.support.annotation.ColorRes;
import android.support.annotation.IdRes;
import android.support.annotation.StringRes;
import android.text.util.Linkify;
import android.util.Patterns;
import android.view.View;
import android.widget.TextView;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import de.thedevstack.conversationsplus.ConversationsPlusColors;

/**
 *
 */
public final class TextViewUtil extends ViewUtil {
    public static void linkifyXmpp(TextView tv) {
        int patternMatchCount = 0;
        int oldAutoLinkMask = tv.getAutoLinkMask();
        CharSequence body = tv.getText();

        // first check if we have a match on XMPP_PATTERN so we do not have to check for EMAIL_ADDRESSES
        patternMatchCount += countMatches(XMPP_PATTERN, body);
        if ((Linkify.EMAIL_ADDRESSES & oldAutoLinkMask) != 0 && patternMatchCount > 0) {
            oldAutoLinkMask -= Linkify.EMAIL_ADDRESSES;
        }

        // count matches for all patterns
        if ((Linkify.WEB_URLS & oldAutoLinkMask) != 0) {
            patternMatchCount += countMatches(Patterns.WEB_URL, body);
        }
        if ((Linkify.EMAIL_ADDRESSES & oldAutoLinkMask) != 0) {
            patternMatchCount += countMatches(Patterns.EMAIL_ADDRESS, body);
        }
        if ((Linkify.PHONE_NUMBERS & oldAutoLinkMask) != 0) {
            patternMatchCount += countMatches(Patterns.PHONE, body);
        }

        tv.setTextIsSelectable(patternMatchCount <= 1);
        tv.setAutoLinkMask(0);
        Linkify.addLinks(tv, XMPP_PATTERN, "xmpp");
        tv.setAutoLinkMask(oldAutoLinkMask);
    }

    public static void setTextWithoutAutoLink(TextView tv, CharSequence text) {
        int oldAutoLinkMask = tv.getAutoLinkMask();
        tv.setAutoLinkMask(0);
        tv.setText(text);
        tv.setAutoLinkMask(oldAutoLinkMask);
    }

    public static TextView showAndSetText(TextView tv, CharSequence text) {
        visible(tv);
        return setText(tv, text);
    }

    public static TextView showAndSetText(TextView tv, int textResId) {
        visible(tv);
        return setText(tv, textResId);
    }

    public static TextView setText(TextView tv, CharSequence text) {
        if (null != tv) {
            tv.setText(text);
        }

        return tv;
    }

    public static TextView setText(TextView tv, int textResId) {
        if (null != tv) {
            tv.setText(textResId);
        }

        return tv;
    }

    public static TextView setText(View parentView, int textViewId, CharSequence text) {
        return setText((TextView) parentView.findViewById(textViewId), text);
    }

    public static TextView setText(View parentView, int textViewId, int textResId) {
        return setText((TextView) parentView.findViewById(textViewId), textResId);
    }

    public static void enable(TextView tv) {
        setColorEnabledAndTextResId(tv, null, true, null);
    }

    public static void enable(TextView tv, String text) {
        setColorEnabledAndText(tv, null, true, text);
    }

    public static void enable(TextView tv, Integer color) {
        setColorEnabledAndTextResId(tv, color, true, null);
    }

    public static void enable(TextView tv, Integer color, @StringRes Integer resid) {
        setColorEnabledAndTextResId(tv, color, true, resid);
    }

    public static void disable(TextView tv) {
        setColorEnabledAndTextResId(tv, null, false, null);
    }

    public static void disable(TextView tv, String text) {
        setColorEnabledAndText(tv, null, false, text);
    }

    public static void disable(TextView tv, Integer color) {
        setColorEnabledAndTextResId(tv, color, false, null);
    }

    public static void disable(TextView tv, Integer color, @StringRes Integer resid) {
        setColorEnabledAndTextResId(tv, color, false, resid);
    }

    public static void setColor(TextView tv, Integer color) {
        setColorByIdEnabledAndTextResId(tv, color, null, null);
    }

    private static void setColorByIdEnabledAndTextResId(TextView tv, @ColorRes Integer colorResId, Boolean enabled, @StringRes Integer resid) {
        Integer color = null;
        if (null != colorResId) {
            color = ConversationsPlusColors.byId(colorResId);
        }
        setColorEnabledAndTextResId(tv, color, enabled, resid);
    }

    public static void setColorEnabledAndTextResId(TextView tv, Integer color, Boolean enabled, @StringRes Integer resid) {
        if (null != color) {
            tv.setTextColor(color);
        }

        if (enabled != null) {
            tv.setEnabled(enabled);
        }

        if (resid != null) {
            setText(tv, resid);
        }
    }

    public static void setColorEnabledAndText(TextView tv, Integer color, Boolean enabled, String text) {
        if (null != color) {
            tv.setTextColor(color);
        }

        if (enabled != null) {
            tv.setEnabled(enabled);
        }

        if (text != null) {
            setText(tv, text);
        }
    }

    /**
     * Counts the number of occurrences of the pattern in body.
     *
     * @param pattern the pattern to match
     * @param body    the body to find the pattern
     * @return the number of occurrences
     */
    private static int countMatches(Pattern pattern, CharSequence body) {
        Matcher matcher = pattern.matcher(body);
        int count = 0;
        while (matcher.find()) {
            count++;
        }
        return count;
    }

    private static final Pattern XMPP_PATTERN = Pattern
            .compile("xmpp\\:(?:(?:["
                    + Patterns.GOOD_IRI_CHAR
                    + "\\;\\/\\?\\@\\&\\=\\#\\~\\-\\.\\+\\!\\*\\'\\(\\)\\,\\_])"
                    + "|(?:\\%[a-fA-F0-9]{2}))+");

    private TextViewUtil() {
        // avoid instantiation - helper class
    }
}