/*

Copyright 2019 fuwa

This file is part of CyberWOW.

CyberWOW is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

CyberWOW is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with CyberWOW.  If not, see <https://www.gnu.org/licenses/>.

*/

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

import '../state.dart';
import '../helper.dart';
import '../logging.dart';

Widget summary(BuildContext context, SyncedState state) {
  final height = state.height.toString();
  final onFire = state.getTransactionPool.length >= 10;
  final onFireNotice = onFire ? ' 🔥' : '';
  final poolLength = state.getTransactionPool.length;
  final poolLengthNotice = poolLength > 1 ? '[$poolLength] ' : '';
  final txNotice = state.getTransactionPool.isEmpty
      ? ''
      : poolLengthNotice +
          state.getTransactionPool.first['id_hash'].substring(0, 6) +
          ' ...';

  return Container(
    padding: EdgeInsets.only(bottom: 10.0),
    child: Align(
      alignment: Alignment.center,
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Spacer(
            flex: 17,
          ),
          Image.asset(
            'assets/lolnode_icon.png',
            height: 220,
          ),
          Spacer(
            flex: 7,
          ),
          Expanded(
              flex: 15,
              child: Row(children: <Widget>[
                Spacer(),
                AnimatedSwitcher(
                  duration: Duration(milliseconds: 500),
                  child: Text(
                    height,
                    style: Theme.of(context).textTheme.headline4,
                    key: ValueKey<int>(state.height),
                  ),
                ),
                AnimatedSwitcher(
                  duration: Duration(milliseconds: 500),
                  child: Text(
                    onFireNotice,
                    style: TextStyle(
                      fontSize: 25,
                    ),
                    key: ValueKey<int>(onFire ? 0 : 1),
                  ),
                ),
                Spacer(),
              ])),
          AnimatedSwitcher(
            duration: Duration(milliseconds: 500),
            child: Text(
              txNotice,
              style: Theme.of(context).textTheme.bodyText1,
              key: ValueKey<int>(poolLength),
            ),
          ),
          Spacer(
            flex: 1,
          ),
          SizedBox(
            height: 20.0,
            width: 20.0,
            child: (state.connected)
                ? Container()
                : CircularProgressIndicator(
                    strokeWidth: 2,
                  ),
          ),
        ],
      ),
    ),
  );
}

Widget rpcView(BuildContext context, String headline6, String body) {
  return Container(
    padding: const EdgeInsets.all(10.0),
    child: Align(
      alignment: Alignment.topLeft,
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Expanded(
              flex: 1,
              child: SingleChildScrollView(
                  scrollDirection: Axis.vertical,
                  child: Column(
                    children: <Widget>[
                      Container(
                        height: 0,
                        margin: const EdgeInsets.only(bottom: 15),
                      ),
                      Text(
                        headline6,
                        style: Theme.of(context).textTheme.headline4,
                      ),
                      Container(
                        height: 1,
                        color: Theme.of(context).primaryColor,
                        margin: const EdgeInsets.only(bottom: 20, top: 20),
                      ),
                      Text(
                        body,
                        style: Theme.of(context).textTheme.bodyText1,
                      )
                    ],
                  )))
        ],
      ),
    ),
  );
}

Widget getInfo(BuildContext context, SyncedState state) =>
    rpcView(context, 'info', state.getInfoCache);

Widget getTransactionPool(BuildContext context, SyncedState state) {
  final pool = state.getTransactionPool;
  const minimalLength = 6;
  final subTitle = pool.length < minimalLength ? '' : ' ‹${pool.length}›';
  return rpcView(context, 'tx pool' + subTitle, state.getTransactionPoolCache);
}

Widget getConnections(BuildContext context, SyncedState state) {
  final peers = state.getConnections;
  const minimalLength = 6;
  final subTitle = peers.length < minimalLength ? '' : ' ‹${peers.length}›';
  return rpcView(context, 'peers' + subTitle, state.getConnectionsCache);
}

Widget terminalView(BuildContext context, String headline6, SyncedState state) {
  final input = TextFormField(
    controller: state.textController,
    // textInputAction: TextInputAction.next,
    // autofocus: true,
    autocorrect: false,
    enableSuggestions: false,
    keyboardType: TextInputType.visiblePassword,
    decoration: InputDecoration(
      // border: UnderlineInputBorder // OutlineInputBorder
      // (
      // ),
      // hintText: 'WOW',
      enabledBorder: UnderlineInputBorder(
        borderSide: BorderSide(
          color: Theme.of(context).primaryColor,
        ),
      ),
      border: InputBorder.none,
    ),
    onFieldSubmitted: (v) {
      String autoReplace(final String x) {
        final words = x.split(' ');

        if (words.length == 0) {
          return x;
        }

        final head = words.first;
        final tail = words.sublist(1);
        final guessHead = head.replaceAll('-', '_');

        return [guessHead, ...tail].join(' ');
      }

      final _text = state.textController.text.trim();
      final line = autoReplace(_text);

      log.info('textController: $state.controller');

      if (line.isNotEmpty) {
        log.finer('terminal input: $line');
        state.appendInput(line);
      }

      state.textController.clear();
    },
  );

  return Container(
    // padding: const EdgeInsets.all(10.0),
    child: Align(
      alignment: Alignment.topLeft,
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Expanded(
              flex: 1,
              child: SingleChildScrollView(
                  scrollDirection: Axis.vertical,
                  reverse: true,
                  child: Column(
                    children: <Widget>[
                      Text(
                        state.appHook.stdoutCache,
                        style: Theme.of(context).textTheme.bodyText1,
                      )
                    ],
                  ))),
          Container(
            margin: const EdgeInsets.all(10.0),
            child: input,
          ),
        ],
      ),
    ),
  );
}

Widget terminal(BuildContext context, SyncedState state) =>
    terminalView(context, 'terminal', state);

Widget pageView(BuildContext context, SyncedState state) {
  void _onPageChanged(int pageIndex) {
    if (pageIndex != 0) {
      SystemChannels.textInput.invokeMethod('TextInput.hide');
    }
    state.onPageChanged(pageIndex);
  }

  return PageView(
    controller: state.pageController,
    onPageChanged: _onPageChanged,
    children: [
      terminal(context, state),
      summary(context, state),
      getTransactionPool(context, state),
      getConnections(context, state),
      getInfo(context, state),
    ],
  );
}

Widget build(BuildContext context, SyncedState state) {
  return Scaffold(body: pageView(context, state));
}