/**
 * The examples provided by Facebook are for non-commercial testing and
 * evaluation purposes only.
 *
 * Facebook reserves all rights not expressly granted.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL
 * FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * @flow
 */
'use strict';

var React = require('react-native');
var {
  Text,
  TextInput,
  View,
  StyleSheet,
} = React;

var TextEventsExample = React.createClass({
  getInitialState: function() {
    return {
      curText: '<No Event>',
      prevText: '<No Event>',
      prev2Text: '<No Event>',
    };
  },

  updateText: function(text) {
    this.setState((state) => {
      return {
        curText: text,
        prevText: state.curText,
        prev2Text: state.prevText,
      };
    });
  },

  render: function() {
    return (
      <View>
        <TextInput
          autoCapitalize="none"
          placeholder="Enter text to see events"
          autoCorrect={false}
          onFocus={() => this.updateText('onFocus')}
          onBlur={() => this.updateText('onBlur')}
          onChange={(event) => this.updateText(
            'onChange text: ' + event.nativeEvent.text
          )}
          onEndEditing={(event) => this.updateText(
            'onEndEditing text: ' + event.nativeEvent.text
          )}
          onSubmitEditing={(event) => this.updateText(
            'onSubmitEditing text: ' + event.nativeEvent.text
          )}
          style={styles.singleLine}
        />
        <Text style={styles.eventLabel}>
          {this.state.curText}{'\n'}
          (prev: {this.state.prevText}){'\n'}
          (prev2: {this.state.prev2Text})
        </Text>
      </View>
    );
  }
});

class AutoExpandingTextInput extends React.Component {
  constructor(props) {
    super(props);
    this.state = {text: '', height: 0};
  }
  render() {
    return (
      <TextInput
        {...this.props}
        multiline={true}
        onChange={(event) => {
          this.setState({
            text: event.nativeEvent.text,
            height: event.nativeEvent.contentSize.height,
          });
        }}
        style={[styles.default, {height: Math.max(35, this.state.height)}]}
        value={this.state.text}
      />
    );
  }
}

class RewriteExample extends React.Component {
  constructor(props) {
    super(props);
    this.state = {text: ''};
  }
  render() {
    var limit = 20;
    var remainder = limit - this.state.text.length;
    var remainderColor = remainder > 5 ? 'blue' : 'red';
    return (
      <View style={styles.rewriteContainer}>
        <TextInput
          multiline={false}
          maxLength={limit}
          onChangeText={(text) => {
            text = text.replace(/ /g, '_');
            this.setState({text});
          }}
          style={styles.default}
          value={this.state.text}
        />
        <Text style={[styles.remainder, {color: remainderColor}]}>
          {remainder}
        </Text>
      </View>
    );
  }
}

class TokenizedTextExample extends React.Component {
  constructor(props) {
    super(props);
    this.state = {text: 'Hello #World'};
  }
  render() {

    //define delimiter
    let delimiter = /\s+/;

    //split string
    let _text = this.state.text;
    let token, index, parts = [];
    while (_text) {
      delimiter.lastIndex = 0;
      token = delimiter.exec(_text);
      if (token === null) {
        break;
      }
      index = token.index;
      if (token[0].length === 0) {
        index = 1;
      }
      parts.push(_text.substr(0, index));
      parts.push(token[0]);
      index = index + token[0].length;
      _text = _text.slice(index);
    }
    parts.push(_text);

    //highlight hashtags
    parts = parts.map((text) => {
      if (/^#/.test(text)) {
        return <Text key={text} style={styles.hashtag}>{text}</Text>;
      } else {
        return text;
      }
    });

    return (
      <View>
        <TextInput
          multiline={true}
          style={styles.multiline}
          onChangeText={(text) => {
            this.setState({text});
          }}>
          <Text>{parts}</Text>
        </TextInput>
      </View>
    );
  }
}

var BlurOnSubmitExample = React.createClass({
  focusNextField(nextField) {
    this.refs[nextField].focus();
  },

  render: function() {
    return (
      <View>
        <TextInput
          ref="1"
          style={styles.singleLine}
          placeholder="blurOnSubmit = false"
          returnKeyType="next"
          blurOnSubmit={false}
          onSubmitEditing={() => this.focusNextField('2')}
        />
        <TextInput
          ref="2"
          style={styles.singleLine}
          keyboardType="email-address"
          placeholder="blurOnSubmit = false"
          returnKeyType="next"
          blurOnSubmit={false}
          onSubmitEditing={() => this.focusNextField('3')}
        />
        <TextInput
          ref="3"
          style={styles.singleLine}
          keyboardType="url"
          placeholder="blurOnSubmit = false"
          returnKeyType="next"
          blurOnSubmit={false}
          onSubmitEditing={() => this.focusNextField('4')}
        />
        <TextInput
          ref="4"
          style={styles.singleLine}
          keyboardType="numeric"
          placeholder="blurOnSubmit = false"
          blurOnSubmit={false}
          onSubmitEditing={() => this.focusNextField('5')}
        />
        <TextInput
          ref="5"
          style={styles.singleLine}
          keyboardType="numbers-and-punctuation"
          placeholder="blurOnSubmit = true"
          returnKeyType="done"
        />
      </View>
    );
  }
});

var styles = StyleSheet.create({
  multiline: {
    height: 60,
    fontSize: 16,
    padding: 4,
    marginBottom: 10,
  },
  eventLabel: {
    margin: 3,
    fontSize: 12,
  },
  singleLine: {
    fontSize: 16,
    padding: 4,
  },
  singleLineWithHeightTextInput: {
    height: 30,
  },
  hashtag: {
    color: 'blue',
    fontWeight: 'bold',
  },
});

exports.title = '<TextInput>';
exports.description = 'Single and multi-line text inputs.';
exports.examples = [
  {
    title: 'Auto-focus',
    render: function() {
      return (
        <TextInput
          autoFocus={true}
          style={styles.singleLine}
          accessibilityLabel="I am the accessibility label for text input"
        />
      );
    }
  },
  {
    title: "Live Re-Write (<sp>  ->  '_')",
    render: function() {
      return <RewriteExample />;
    }
  },
  {
    title: 'Auto-capitalize',
    render: function() {
      var autoCapitalizeTypes = [
        'none',
        'sentences',
        'words',
        'characters',
      ];
      var examples = autoCapitalizeTypes.map((type) => {
        return (
          <TextInput
            key={type}
            autoCapitalize={type}
            placeholder={'autoCapitalize: ' + type}
            style={styles.singleLine}
          />
        );
      });
      return <View>{examples}</View>;
    }
  },
  {
    title: 'Auto-correct',
    render: function() {
      return (
        <View>
          <TextInput
            autoCorrect={true}
            placeholder="This has autoCorrect"
            style={styles.singleLine}
          />
          <TextInput
            autoCorrect={false}
            placeholder="This does not have autoCorrect"
            style={styles.singleLine}
          />
        </View>
      );
    }
  },
  {
    title: 'Keyboard types',
    render: function() {
      var keyboardTypes = [
        'default',
        'email-address',
        'numeric',
        'phone-pad',
      ];
      var examples = keyboardTypes.map((type) => {
        return (
          <TextInput
            key={type}
            keyboardType={type}
            placeholder={'keyboardType: ' + type}
            style={styles.singleLine}
          />
        );
      });
      return <View>{examples}</View>;
    }
  },
  {
    title: 'Blur on submit',
    render: function(): ReactElement { return <BlurOnSubmitExample />; },
  },
  {
    title: 'Event handling',
    render: function(): ReactElement { return <TextEventsExample />; },
  },
  {
    title: 'Colors and text inputs',
    render: function() {
      return (
        <View>
          <TextInput
            style={[styles.singleLine]}
            defaultValue="Default color text"
          />
          <TextInput
            style={[styles.singleLine, {color: 'green'}]}
            defaultValue="Green Text"
          />
          <TextInput
            placeholder="Default placeholder text color"
            style={styles.singleLine}
          />
          <TextInput
            placeholder="Red placeholder text color"
            placeholderTextColor="red"
            style={styles.singleLine}
          />
          <TextInput
            placeholder="Default underline color"
            style={styles.singleLine}
          />
          <TextInput
            placeholder="Blue underline color"
            style={styles.singleLine}
            underlineColorAndroid="blue"
          />
          <TextInput
            defaultValue="Same BackgroundColor as View "
            style={[styles.singleLine, {backgroundColor: 'rgba(100, 100, 100, 0.3)'}]}>
            <Text style={{backgroundColor: 'rgba(100, 100, 100, 0.3)'}}>
              Darker backgroundColor
            </Text>
          </TextInput>
          <TextInput
            defaultValue="Highlight Color is red"
            selectionColor={'red'}
            style={styles.singleLine}>
          </TextInput>
        </View>
      );
    }
  },
  {
    title: 'Text input, themes and heights',
    render: function() {
      return (
        <TextInput
          placeholder="If you set height, beware of padding set from themes"
          style={[styles.singleLineWithHeightTextInput]}
        />
      );
    }
  },
  {
    title: 'Passwords',
    render: function() {
      return (
        <View>
          <TextInput
            defaultValue="iloveturtles"
            secureTextEntry={true}
            style={styles.singleLine}
          />
          <TextInput 
            secureTextEntry={true}
            style={[styles.singleLine, {color: 'red'}]}
            placeholder="color is supported too"
            placeholderTextColor="red"
          />
        </View>
      );
    }
  },
  {
    title: 'Editable',
    render: function() {
      return (
        <TextInput
           defaultValue="Can't touch this! (>'-')> ^(' - ')^ <('-'<) (>'-')> ^(' - ')^"
           editable={false}
           style={styles.singleLine}
         />
      );
    }
  },
  {
    title: 'Multiline',
    render: function() {
      return (
        <View>
          <TextInput
            autoCorrect={true}
            placeholder="multiline, aligned top-left"
            placeholderTextColor="red"
            multiline={true}
            style={[styles.multiline, {textAlign: "left", textAlignVertical: "top"}]}
          />
          <TextInput
            autoCorrect={true}
            placeholder="multiline, aligned center"
            placeholderTextColor="green"
            multiline={true}
            style={[styles.multiline, {textAlign: "center", textAlignVertical: "center"}]}
          />
          <TextInput
            autoCorrect={true}
            multiline={true}
            style={[styles.multiline, {color: 'blue'}, {textAlign: "right", textAlignVertical: "bottom"}]}>
            <Text style={styles.multiline}>multiline with children, aligned bottom-right</Text>
          </TextInput>
        </View>
      );
    }
  },
  {
    title: 'Fixed number of lines',
    platform: 'android',
    render: function() {
      return (
        <View>
          <TextInput numberOfLines={2}
            multiline={true}
            placeholder="Two line input"
          />
          <TextInput numberOfLines={5}
            multiline={true}
            placeholder="Five line input"
          />
        </View>
      );
    }
  },
  {
    title: 'Auto-expanding',
    render: function() {
      return (
        <View>
          <AutoExpandingTextInput
            placeholder="height increases with content"
            enablesReturnKeyAutomatically={true}
            returnKeyType="done"
          />
        </View>
      );
    }
  },
  {
    title: 'Attributed text',
    render: function() {
      return <TokenizedTextExample />;
    }
  },
];