import React, {PropTypes, PureComponent} from 'react';
import autobind from 'autobind-decorator';
import {remote} from 'electron';
import {DEBOUNCE_MILLIS, isMac} from '../../common/constants';
import {Dropdown, DropdownButton, DropdownDivider, DropdownHint, DropdownItem} from './base/dropdown';
import {trackEvent} from '../../analytics';
import {showPrompt} from './modals/index';
import MethodDropdown from './dropdowns/method-dropdown';
import PromptButton from './base/prompt-button';
import OneLineEditor from './codemirror/one-line-editor';

@autobind
class RequestUrlBar extends PureComponent {
  constructor (props) {
    super(props);
    this.state = {
      currentInterval: null,
      currentTimeout: null,
      downloadPath: null
    };

    this._urlChangeDebounceTimeout = null;
    this._lastPastedText = null;
  }

  _setDropdownRef (n) {
    this._dropdown = n;
  }

  _setInputRef (n) {
    this._input = n;
  }

  _handleMetaClickSend (e) {
    e.preventDefault();
    this._dropdown.show();
  }

  _handleFormSubmit (e) {
    e.preventDefault();
    e.stopPropagation();

    this._handleSend();
  }

  _handleMethodChange (method) {
    this.props.onMethodChange(method);
    trackEvent('Request', 'Method Change', method);
  }

  _handleUrlChange (url) {
    clearTimeout(this._urlChangeDebounceTimeout);
    this._urlChangeDebounceTimeout = setTimeout(async () => {
      const pastedText = this._lastPastedText;

      // If no pasted text in the queue, just fire the regular change handler
      if (!pastedText) {
        this.props.onUrlChange(url);
        return;
      }

      // Reset pasted text cache
      this._lastPastedText = null;

      // Attempt to import the pasted text
      const importedRequest = await this.props.handleImport(pastedText);

      // Update depending on whether something was imported
      if (!importedRequest) {
        this.props.onUrlChange(url);
      }
    }, DEBOUNCE_MILLIS);
  }

  _handleUrlPaste (e) {
    // NOTE: We're not actually doing the import here to avoid races with onChange
    this._lastPastedText = e.clipboardData.getData('text/plain');
  }

  _handleGenerateCode () {
    this.props.handleGenerateCode();
    trackEvent('Request', 'Generate Code', 'Send Action');
  }

  _handleSetDownloadLocation () {
    const options = {
      title: 'Select Download Location',
      buttonLabel: 'Select',
      properties: ['openDirectory']
    };

    remote.dialog.showOpenDialog(options, paths => {
      if (!paths || paths.length === 0) {
        trackEvent('Response', 'Download Select Cancel');
        return;
      }

      this.setState({downloadPath: paths[0]});
    });
  }

  _handleClearDownloadLocation () {
    this.setState({downloadPath: null});
  }

  _handleKeyDown (e) {
    if (!this._input) {
      return;
    }

    // meta+l
    const metaPressed = isMac() ? e.metaKey : e.ctrlKey;
    if (metaPressed && e.keyCode === 76) {
      e.preventDefault();
      this._input.focus();
      this._input.selectAll();
    }
  }

  _handleSend () {
    // Don't stop interval because duh, it needs to keep going!
    // XXX this._handleStopInterval(); XXX

    this._handleStopTimeout();

    const {downloadPath} = this.state;
    if (downloadPath) {
      this.props.handleSendAndDownload(downloadPath);
    } else {
      this.props.handleSend();
    }
  }

  _handleSendAfterDelay () {
    showPrompt({
      inputType: 'decimal',
      headerName: 'Send After Delay',
      label: 'Delay in seconds',
      defaultValue: 3,
      submitName: 'Start',
      onComplete: seconds => {
        this._handleStopTimeout();
        this._sendTimeout = setTimeout(this._handleSend, seconds * 1000);
        this.setState({currentTimeout: seconds});

        trackEvent('Request', 'Send on Delay', 'Send Action', seconds);
      }
    });
  }

  _handleSendOnInterval () {
    showPrompt({
      inputType: 'decimal',
      headerName: 'Send on Interval',
      label: 'Interval in seconds',
      defaultValue: 3,
      submitName: 'Start',
      onComplete: seconds => {
        this._handleStopInterval();
        this._sendInterval = setInterval(this._handleSend, seconds * 1000);
        this.setState({currentInterval: seconds});

        trackEvent('Request', 'Send on Interval', 'Send Action', seconds);
      }
    });
  }

  _handleStopInterval () {
    clearTimeout(this._sendInterval);
    if (this.state.currentInterval) {
      this.setState({currentInterval: null});
      trackEvent('Request', 'Stop Send Interval');
    }
  }

  _handleStopTimeout () {
    clearTimeout(this._sendTimeout);
    if (this.state.currentTimeout) {
      this.setState({currentTimeout: null});
      trackEvent('Request', 'Stop Send Timeout');
    }
  }

  _handleResetTimeouts () {
    this._handleStopTimeout();
    this._handleStopInterval();
  }

  _handleClickSend (e) {
    const metaPressed = isMac() ? e.metaKey : e.ctrlKey;

    // If we're pressing a meta key, let the dropdown open
    if (metaPressed) {
      e.preventDefault(); // Don't submit the form
      return;
    }

    // If we're not pressing a meta key, cancel dropdown and send the request
    e.stopPropagation(); // Don't trigger the dropdown
    this._handleFormSubmit(e);
  }

  componentDidMount () {
    document.body.addEventListener('keydown', this._handleKeyDown);
  }

  componentWillUnmount () {
    document.body.removeEventListener('keydown', this._handleKeyDown);
  }

  componentWillReceiveProps (nextProps) {
    if (nextProps.requestId !== this.props.requestId) {
      this._handleResetTimeouts();
    }
  }

  renderSendButton () {
    const {currentInterval, currentTimeout, downloadPath} = this.state;

    let cancelButton = null;
    if (currentInterval) {
      cancelButton = (
        <button type="button"
                key="cancel-interval"
                className="urlbar__send-btn danger"
                onClick={this._handleStopInterval}>
          Stop
        </button>
      );
    } else if (currentTimeout) {
      cancelButton = (
        <button type="button"
                key="cancel-timeout"
                className="urlbar__send-btn danger"
                onClick={this._handleStopTimeout}>
          Cancel
        </button>
      );
    }

    let sendButton;
    if (!cancelButton) {
      sendButton = (
        <Dropdown key="dropdown" className="tall" right ref={this._setDropdownRef}>
          <DropdownButton className="urlbar__send-btn"
                          onContextMenu={this._handleMetaClickSend}
                          onClick={this._handleClickSend}
                          type="submit">
            {downloadPath ? 'Download' : 'Send'}
          </DropdownButton>
          <DropdownDivider>Basic</DropdownDivider>
          <DropdownItem type="submit">
            <i className="fa fa-arrow-circle-o-right"/> Send Now
            <DropdownHint char="Enter"/>
          </DropdownItem>
          <DropdownItem onClick={this._handleGenerateCode}>
            <i className="fa fa-code"/> Generate Client Code
          </DropdownItem>
          <DropdownDivider>Advanced</DropdownDivider>
          <DropdownItem onClick={this._handleSendAfterDelay}>
            <i className="fa fa-clock-o"/> Send After Delay
          </DropdownItem>
          <DropdownItem onClick={this._handleSendOnInterval}>
            <i className="fa fa-repeat"/> Repeat on Interval
          </DropdownItem>
          {downloadPath ? (
            <DropdownItem stayOpenAfterClick addIcon
                          buttonClass={PromptButton}
                          onClick={this._handleClearDownloadLocation}>
              <i className="fa fa-stop-circle"/> Stop Auto-Download
            </DropdownItem>
          ) : (
            <DropdownItem onClick={this._handleSetDownloadLocation}>
              <i className="fa fa-download"/> Download After Send
            </DropdownItem>
          )}
        </Dropdown>
      );
    }

    return [
      cancelButton,
      sendButton
    ];
  }

  render () {
    const {
      url,
      method,
      handleRender,
      handleGetRenderContext,
      handleAutocompleteUrls,
      uniquenessKey
    } = this.props;

    return (
      <div className="urlbar">
        <MethodDropdown onChange={this._handleMethodChange} method={method}>
          {method} <i className="fa fa-caret-down"/>
        </MethodDropdown>
        <form onSubmit={this._handleFormSubmit}>
          <OneLineEditor
            key={uniquenessKey}
            ref={this._setInputRef}
            onPaste={this._handleUrlPaste}
            forceEditor
            type="text"
            render={handleRender}
            getAutocompleteConstants={handleAutocompleteUrls}
            getRenderContext={handleGetRenderContext}
            placeholder="https://api.myproduct.com/v1/users"
            defaultValue={url}
            onChange={this._handleUrlChange}/>
          {this.renderSendButton()}
        </form>
      </div>
    );
  }
}

RequestUrlBar.propTypes = {
  handleSend: PropTypes.func.isRequired,
  handleSendAndDownload: PropTypes.func.isRequired,
  handleRender: PropTypes.func.isRequired,
  handleGetRenderContext: PropTypes.func.isRequired,
  handleImport: PropTypes.func.isRequired,
  handleAutocompleteUrls: PropTypes.func.isRequired,
  onUrlChange: PropTypes.func.isRequired,
  onMethodChange: PropTypes.func.isRequired,
  handleGenerateCode: PropTypes.func.isRequired,
  url: PropTypes.string.isRequired,
  method: PropTypes.string.isRequired,
  requestId: PropTypes.string.isRequired,
  uniquenessKey: PropTypes.string.isRequired
};

export default RequestUrlBar;