import React from 'react';
import PropTypes from 'prop-types';
import { isEmpty, toUpper, includes } from 'lodash';
import Button from 'antd/lib/button';
import List from 'antd/lib/list';
import Modal from 'antd/lib/modal';
import Input from 'antd/lib/input';
import Steps from 'antd/lib/steps';
import { wrap as wrapDialog, DialogPropType } from '@/components/DialogWrapper';
import { PreviewCard } from '@/components/PreviewCard';
import EmptyState from '@/components/items-list/components/EmptyState';
import DynamicForm from '@/components/dynamic-form/DynamicForm';
import helper from '@/components/dynamic-form/dynamicFormHelper';
import { HelpTrigger, TYPES as HELP_TRIGGER_TYPES } from '@/components/HelpTrigger';

const { Step } = Steps;
const { Search } = Input;

const StepEnum = {
  SELECT_TYPE: 0,
  CONFIGURE_IT: 1,
  DONE: 2,
};

class CreateSourceDialog extends React.Component {
  static propTypes = {
    dialog: DialogPropType.isRequired,
    types: PropTypes.arrayOf(PropTypes.object),
    sourceType: PropTypes.string.isRequired,
    imageFolder: PropTypes.string.isRequired,
    helpTriggerPrefix: PropTypes.string,
    onCreate: PropTypes.func.isRequired,
  };

  static defaultProps = {
    types: [],
    helpTriggerPrefix: null,
  };

  state = {
    searchText: '',
    selectedType: null,
    savingSource: false,
    currentStep: StepEnum.SELECT_TYPE,
  };

  selectType = (selectedType) => {
    this.setState({ selectedType, currentStep: StepEnum.CONFIGURE_IT });
  };

  resetType = () => {
    if (this.state.currentStep === StepEnum.CONFIGURE_IT) {
      this.setState({ searchText: '', selectedType: null, currentStep: StepEnum.SELECT_TYPE });
    }
  };

  createSource = (values, successCallback, errorCallback) => {
    const { selectedType, savingSource } = this.state;
    if (!savingSource) {
      this.setState({ savingSource: true, currentStep: StepEnum.DONE });
      this.props.onCreate(selectedType, values).then((data) => {
        successCallback('Saved.');
        this.props.dialog.close({ success: true, data });
      }).catch((error) => {
        this.setState({ savingSource: false, currentStep: StepEnum.CONFIGURE_IT });
        errorCallback(error.message);
      });
    }
  };

  renderTypeSelector() {
    const { types } = this.props;
    const { searchText } = this.state;
    const filteredTypes = types.filter(type => isEmpty(searchText) ||
      includes(type.name.toLowerCase(), searchText.toLowerCase()));
    return (
      <div className="m-t-10">
        <Search
          placeholder="Search..."
          onChange={e => this.setState({ searchText: e.target.value })}
          autoFocus
          data-test="SearchSource"
        />
        <div className="scrollbox p-5 m-t-10" style={{ minHeight: '30vh', maxHeight: '40vh' }}>
          {isEmpty(filteredTypes) ? (<EmptyState className="" />) : (
            <List
              size="small"
              dataSource={filteredTypes}
              renderItem={item => this.renderItem(item)}
            />
          )}
        </div>
      </div>
    );
  }

  renderForm() {
    const { imageFolder, helpTriggerPrefix } = this.props;
    const { selectedType } = this.state;
    const fields = helper.getFields(selectedType);
    const helpTriggerType = `${helpTriggerPrefix}${toUpper(selectedType.type)}`;
    return (
      <div className="p-5">
        <div className="d-flex justify-content-center align-items-center">
          <img
            className="p-5"
            src={`${imageFolder}/${selectedType.type}.png`}
            alt={selectedType.name}
            width="48"
          />
          <h4 className="m-0">{selectedType.name}</h4>
        </div>
        <div className="text-right">
          {HELP_TRIGGER_TYPES[helpTriggerType] && (
            <HelpTrigger className="f-13" type={helpTriggerType}>
              Setup Instructions <i className="fa fa-question-circle" />
            </HelpTrigger>
          )}
        </div>
        <DynamicForm
          id="sourceForm"
          fields={fields}
          onSubmit={this.createSource}
          feedbackIcons
          hideSubmitButton
        />
      </div>
    );
  }

  renderItem(item) {
    const { imageFolder } = this.props;
    return (
      <List.Item
        className="p-l-10 p-r-10 clickable"
        onClick={() => this.selectType(item)}
      >
        <PreviewCard title={item.name} imageUrl={`${imageFolder}/${item.type}.png`} roundedImage={false}>
          <i className="fa fa-angle-double-right" />
        </PreviewCard>
      </List.Item>
    );
  }

  render() {
    const { currentStep, savingSource } = this.state;
    const { dialog, sourceType } = this.props;
    return (
      <Modal
        {...dialog.props}
        title={`Create a New ${sourceType}`}
        footer={(currentStep === StepEnum.SELECT_TYPE) ? [
          (<Button key="cancel" onClick={() => dialog.dismiss()}>Cancel</Button>),
          (<Button key="submit" type="primary" disabled>Create</Button>),
        ] : [
          (<Button key="previous" onClick={this.resetType}>Previous</Button>),
          (
            <Button
              key="submit"
              htmlType="submit"
              form="sourceForm"
              type="primary"
              loading={savingSource}
              data-test="CreateSourceButton"
            >
              Create
            </Button>
          ),
        ]}
      >
        <div data-test="CreateSourceDialog">
          <Steps className="hidden-xs m-b-10" size="small" current={currentStep} progressDot>
            {currentStep === StepEnum.CONFIGURE_IT ? (
              <Step
                title={<a>Type Selection</a>}
                className="clickable"
                onClick={this.resetType}
              />
            ) : (<Step title="Type Selection" />)}
            <Step title="Configuration" />
            <Step title="Done" />
          </Steps>
          {currentStep === StepEnum.SELECT_TYPE && this.renderTypeSelector()}
          {currentStep !== StepEnum.SELECT_TYPE && this.renderForm()}
        </div>
      </Modal>
    );
  }
}

export default wrapDialog(CreateSourceDialog);