/**
 * 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 WithLabel = React.createClass({
  render: function() {
    return (
      <View style={styles.labelContainer}>
        <View style={styles.label}>
          <Text>{this.props.label}</Text>
        </View>
        {this.props.children}
      </View>
    );
  },
});

var TextEventsExample = React.createClass({
  getInitialState: function() {
    return {
      curText: '<No Event>',
      prevText: '<No Event>',
      prev2Text: '<No Event>',
      prev3Text: '<No Event>',
    };
  },

  updateText: function(text) {
    this.setState((state) => {
      return {
        curText: text,
        prevText: state.curText,
        prev2Text: state.prevText,
        prev3Text: state.prev2Text,
      };
    });
  },

  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
          )}
          onSelectionChange={(event) => this.updateText(
            'onSelectionChange range: ' +
              event.nativeEvent.selection.start + ',' +
              event.nativeEvent.selection.end
          )}
          onKeyPress={(event) => {
            this.updateText('onKeyPress key: ' + event.nativeEvent.key);
          }}
          style={styles.default}
        />
        <Text style={styles.eventLabel}>
          {this.state.curText}{'\n'}
          (prev: {this.state.prevText}){'\n'}
          (prev2: {this.state.prev2Text}){'\n'}
          (prev3: {this.state.prev3Text})
        </Text>
      </View>
    );
  }
});

class AutoExpandingTextInput extends React.Component {
  state: any;

  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 {
  state: any;

  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 RewriteExampleInvalidCharacters extends React.Component {
  state: any;

  constructor(props) {
    super(props);
    this.state = {text: ''};
  }
  render() {
    return (
      <View style={styles.rewriteContainer}>
        <TextInput
          multiline={false}
          onChangeText={(text) => {
            this.setState({text: text.replace(/\s/g, '')});
          }}
          style={styles.default}
          value={this.state.text}
        />
      </View>
    );
  }
}

class TokenizedTextExample extends React.Component {
  state: any;

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

var styles = StyleSheet.create({
  page: {
    paddingBottom: 300,
  },
  default: {
    height: 26,
    borderWidth: 0.5,
    borderColor: '#0f0f0f',
    flex: 1,
    fontSize: 13,
    padding: 4,
  },
  multiline: {
    borderWidth: 0.5,
    borderColor: '#0f0f0f',
    flex: 1,
    fontSize: 13,
    height: 50,
    padding: 4,
    marginBottom: 4,
  },
  multilineWithFontStyles: {
    color: 'blue',
    fontWeight: 'bold',
    fontSize: 18,
    fontFamily: 'Cochin',
    height: 60,
  },
  multilineChild: {
    width: 50,
    height: 40,
    position: 'absolute',
    right: 5,
    backgroundColor: 'red',
  },
  eventLabel: {
    margin: 3,
    fontSize: 12,
  },
  labelContainer: {
    flexDirection: 'row',
    marginVertical: 2,
    flex: 1,
  },
  label: {
    width: 115,
    alignItems: 'flex-end',
    marginRight: 10,
    paddingTop: 2,
  },
  rewriteContainer: {
    flexDirection: 'row',
    alignItems: 'center',
  },
  remainder: {
    textAlign: 'right',
    width: 24,
  },
  hashtag: {
    color: 'blue',
    fontWeight: 'bold',
  },
});

exports.displayName = (undefined: ?string);
exports.title = '<TextInput>';
exports.description = 'Single and multi-line text inputs.';
exports.examples = [
  {
    title: 'Auto-focus',
    render: function() {
      return (
        <TextInput
          autoFocus={true}
          style={styles.default}
          accessibilityLabel="I am the accessibility label for text input"
        />
      );
    }
  },
  {
    title: "Live Re-Write (<sp>  ->  '_') + maxLength",
    render: function() {
      return <RewriteExample />;
    }
  },
  {
    title: 'Live Re-Write (no spaces allowed)',
    render: function() {
      return <RewriteExampleInvalidCharacters />;
    }
  },
  {
    title: 'Auto-capitalize',
    render: function() {
      return (
        <View>
          <WithLabel label="none">
            <TextInput
              autoCapitalize="none"
              style={styles.default}
            />
          </WithLabel>
          <WithLabel label="sentences">
            <TextInput
              autoCapitalize="sentences"
              style={styles.default}
            />
          </WithLabel>
          <WithLabel label="words">
            <TextInput
              autoCapitalize="words"
              style={styles.default}
            />
          </WithLabel>
          <WithLabel label="characters">
            <TextInput
              autoCapitalize="characters"
              style={styles.default}
            />
          </WithLabel>
        </View>
      );
    }
  },
  {
    title: 'Auto-correct',
    render: function() {
      return (
        <View>
          <WithLabel label="true">
            <TextInput autoCorrect={true} style={styles.default} />
          </WithLabel>
          <WithLabel label="false">
            <TextInput autoCorrect={false} style={styles.default} />
          </WithLabel>
        </View>
      );
    }
  },
  {
    title: 'Keyboard types',
    render: function() {
      var keyboardTypes = [
        'default',
        'ascii-capable',
        'numbers-and-punctuation',
        'url',
        'number-pad',
        'phone-pad',
        'name-phone-pad',
        'email-address',
        'decimal-pad',
        'twitter',
        'web-search',
        'numeric',
      ];
      var examples = keyboardTypes.map((type) => {
        return (
          <WithLabel key={type} label={type}>
            <TextInput
              keyboardType={type}
              style={styles.default}
            />
          </WithLabel>
        );
      });
      return <View>{examples}</View>;
    }
  },
  {
    title: 'Keyboard appearance',
    render: function() {
      var keyboardAppearance = [
        'default',
        'light',
        'dark',
      ];
      var examples = keyboardAppearance.map((type) => {
        return (
          <WithLabel key={type} label={type}>
            <TextInput
              keyboardAppearance={type}
              style={styles.default}
            />
          </WithLabel>
        );
      });
      return <View>{examples}</View>;
    }
  },
  {
    title: 'Return key types',
    render: function() {
      var returnKeyTypes = [
        'default',
        'go',
        'google',
        'join',
        'next',
        'route',
        'search',
        'send',
        'yahoo',
        'done',
        'emergency-call',
      ];
      var examples = returnKeyTypes.map((type) => {
        return (
          <WithLabel key={type} label={type}>
            <TextInput
              returnKeyType={type}
              style={styles.default}
            />
          </WithLabel>
        );
      });
      return <View>{examples}</View>;
    }
  },
  {
    title: 'Enable return key automatically',
    render: function() {
      return (
        <View>
          <WithLabel label="true">
            <TextInput enablesReturnKeyAutomatically={true} style={styles.default} />
          </WithLabel>
        </View>
      );
    }
  },
  {
    title: 'Secure text entry',
    render: function() {
      return (
        <View>
          <WithLabel label="true">
            <TextInput password={true} style={styles.default} defaultValue="abc" />
          </WithLabel>
        </View>
      );
    }
  },
  {
    title: 'Event handling',
    render: function(): ReactElement { return <TextEventsExample />; },
  },
  {
    title: 'Colored input text',
    render: function() {
      return (
        <View>
          <TextInput
            style={[styles.default, {color: 'blue'}]}
            defaultValue="Blue"
          />
          <TextInput
            style={[styles.default, {color: 'green'}]}
            defaultValue="Green"
          />
        </View>
      );
    }
  },
  {
    title: 'Colored highlight/cursor for text input',
    render: function() {
      return (
        <View>
          <TextInput
            style={styles.default}
            selectionColor={"green"}
            defaultValue="Highlight me"
          />
          <TextInput
            style={styles.default}
            selectionColor={"rgba(86, 76, 205, 1)"}
            defaultValue="Highlight me"
          />
        </View>
      );
    }
  },
  {
    title: 'Clear button mode',
    render: function () {
      return (
        <View>
          <WithLabel label="never">
            <TextInput
              style={styles.default}
              clearButtonMode="never"
            />
          </WithLabel>
          <WithLabel label="while editing">
            <TextInput
              style={styles.default}
              clearButtonMode="while-editing"
            />
          </WithLabel>
          <WithLabel label="unless editing">
            <TextInput
              style={styles.default}
              clearButtonMode="unless-editing"
            />
          </WithLabel>
          <WithLabel label="always">
            <TextInput
              style={styles.default}
              clearButtonMode="always"
            />
          </WithLabel>
        </View>
      );
    }
  },
  {
    title: 'Clear and select',
    render: function() {
      return (
        <View>
          <WithLabel label="clearTextOnFocus">
            <TextInput
              placeholder="text is cleared on focus"
              defaultValue="text is cleared on focus"
              style={styles.default}
              clearTextOnFocus={true}
            />
          </WithLabel>
          <WithLabel label="selectTextOnFocus">
            <TextInput
              placeholder="text is selected on focus"
              defaultValue="text is selected on focus"
              style={styles.default}
              selectTextOnFocus={true}
            />
          </WithLabel>
        </View>
      );
    }
  },
  {
    title: 'Blur on submit',
    render: function(): ReactElement { return <BlurOnSubmitExample />; },
  },
  {
    title: 'Multiline blur on submit',
    render: function() {
      return (
        <View>
          <TextInput
            style={styles.multiline}
            placeholder="blurOnSubmit = true"
            returnKeyType="next"
            blurOnSubmit={true}
            multiline={true}
            onSubmitEditing={event => alert(event.nativeEvent.text)}
          />
        </View>
      );
    }
  },
  {
    title: 'Multiline',
    render: function() {
      return (
        <View>
          <TextInput
            placeholder="multiline text input"
            multiline={true}
            style={styles.multiline}
          />
          <TextInput
            placeholder="multiline text input with font styles and placeholder"
            multiline={true}
            clearTextOnFocus={true}
            autoCorrect={true}
            autoCapitalize="words"
            placeholderTextColor="red"
            keyboardType="url"
            style={[styles.multiline, styles.multilineWithFontStyles]}
          />
          <TextInput
            placeholder="uneditable multiline text input"
            editable={false}
            multiline={true}
            style={styles.multiline}
          />
          <TextInput
            placeholder="multiline with children"
            multiline={true}
            enablesReturnKeyAutomatically={true}
            returnKeyType="go"
            style={styles.multiline}>
            <View style={styles.multilineChild}/>
          </TextInput>
        </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 />;
    }
  },
];
