import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/gestures.dart';
import 'package:git_flux/screens/screens.dart';
import 'package:git_flux/utils/utils.dart';

/// Events types:
///
/// https://developer.github.com/v3/activity/events/types/#event-types--payloads
class EventItem extends StatelessWidget {
  final Event event;
  EventItem(this.event);

  TextSpan _buildEvent(BuildContext context) {
    switch (event.type) {
      case 'IssuesEvent':
        return TextSpan(children: [
          TextSpan(text: ' ${event.payload['action']} issue '),
          _buildIssue(context),
          TextSpan(text: ' at '),
          _buildRepo(context),
        ]);
      case 'PushEvent':
        return TextSpan(children: [
          TextSpan(text: ' pushed to '),
          TextSpan(
            text: event.payload['ref'],
            style: TextStyle(color: CupertinoColors.activeBlue),
          ),
          TextSpan(text: ' at '),
          _buildRepo(context),
          TextSpan(text: '')
        ]);
      case 'PullRequestEvent':
        return TextSpan(children: [
          TextSpan(text: ' ${event.payload['action']} pull request '),
          _buildPullRequest(context),
          TextSpan(text: ' at '),
          _buildRepo(context),
        ]);
      case 'PullRequestReviewCommentEvent':
        return TextSpan(children: [
          TextSpan(text: ' reviewed pull request '),
          _buildPullRequest(context),
          TextSpan(text: ' at '),
          _buildRepo(context),
        ]);
      case 'WatchEvent':
        return TextSpan(children: [
          TextSpan(text: ' ${event.payload['action']} '),
          _buildRepo(context)
        ]);
      case 'IssueCommentEvent':
        return TextSpan(children: [
          TextSpan(text: ' commented on issue '),
          _buildIssue(context),
          TextSpan(text: ' at '),
          _buildRepo(context),
          // TextSpan(text: event.payload['comment']['body'])
        ]);
      default:
        return TextSpan(
          text: 'Type ${event.type} Not implement yet',
          style: TextStyle(color: CupertinoColors.destructiveRed),
        );
    }
  }

  String _buildOriginalComment() {
    switch (event.type) {
      case 'IssueCommentEvent':
        return event.payload['comment']['body'];
      case 'IssuesEvent':
        return event.payload['issue']['title'];
      case 'PullRequestEvent':
        return event.payload['pull_request']['title'];
      case 'PullRequestReviewCommentEvent':
        return event.payload['comment']['body'];
      default:
        return '';
    }
  }

  String _buildComment() {
    return _buildOriginalComment();
  }

  TextSpan _buildLink(BuildContext context, String text, Function handle) {
    return TextSpan(
      text: text,
      style: TextStyle(color: Color(0xff0366d6)),
      recognizer: TapGestureRecognizer()
        ..onTap = () {
          Navigator.of(context).push(
            CupertinoPageRoute(
              builder: (context) {
                return handle();
              },
            ),
          );
        },
    );
  }

  TextSpan _buildRepo(BuildContext context) {
    return _buildLink(context, event.repo.name, () => RepoScreen());
  }

  TextSpan _buildIssue(BuildContext context) {
    return _buildLink(context,
        '#' + event.payload['issue']['number'].toString(), () => UserScreen());
  }

  TextSpan _buildPullRequest(BuildContext context) {
    return _buildLink(
        context,
        '#' + event.payload['pull_request']['number'].toString(),
        () => UserScreen());
  }

  IconData _buildIconData(BuildContext context) {
    switch (event.type) {
      case 'IssueCommentEvent':
        return Octicons.comment_discussion;
      case 'IssuesEvent':
        return Octicons.issue_opened;
      case 'PullRequestEvent':
        return Octicons.git_pull_request;
      case 'PushEvent':
        return Octicons.repo_push;
      case 'WatchEvent':
        return Octicons.star;
      default:
        return Octicons.octoface;
    }
  }

  @override
  build(context) {
    return Container(
      padding: EdgeInsets.all(10),
      decoration: BoxDecoration(
          border: Border(
              bottom: BorderSide(color: CupertinoColors.lightBackgroundGray))),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          Row(
            children: <Widget>[
              CircleAvatar(
                backgroundColor: Colors.transparent,
                backgroundImage: NetworkImage(event.actor.avatarUrl),
                radius: 16,
              ),
              Padding(padding: EdgeInsets.only(left: 10)),
              Expanded(
                child: RichText(
                  text: TextSpan(
                    style: TextStyle(color: Color(0xff24292e), height: 1.2),
                    children: <TextSpan>[
                      _buildLink(
                          context, event.actor.login, () => UserScreen()),
                      _buildEvent(context),
                    ],
                  ),
                ),
              ),
              Padding(padding: EdgeInsets.only(left: 10)),
              Icon(_buildIconData(context),
                  color: CupertinoColors.inactiveGray),
            ],
          ),
          Container(
              padding: EdgeInsets.only(left: 42, top: 8),
              child: Text(_buildComment(),
                  overflow: TextOverflow.ellipsis,
                  style: TextStyle(color: Color(0xffaaaaaa))))
        ],
      ),
    );
  }
}