import * as React from 'react';

import { AlertCreated, AlertCreatedKey } from '../Events';
import '../Extensions/String';
import { getLogger } from './Logging';
import { Default as PubSubInstance, PubSub } from './PubSub';

export class Alert {
  private static displayName = 'Alert';

  private readonly logger = getLogger(Alert.displayName);

  constructor(private readonly pubSub: PubSub) {}

  public create(
    content: any,
    header?: string,
    style?: string,
    timeout?: number,
  ) {
    if (
      String.isNullOrEmpty(content) === false ||
      String.isNullOrEmpty(header) === false
    ) {
      this.pubSub.publish<AlertCreated>(AlertCreatedKey, {
        content,
        header,
        style,
        timeout,
      });
    }
  }

  public createForError<TError>(
    error: TError,
    header?: string,
    style = 'danger',
    timeout?: number,
    formatter?: (e: TError) => any,
    logErrorObject = false,
  ) {
    if (error != null) {
      let content: any;
      let text: string | undefined;
      const anyError = error as any;
      const childError = anyError.error;

      if (formatter != null) {
        content = formatter(error);
        text = String.stringify(content);
      } else {
        let code =
          anyError.status || anyError.Status || anyError.code || anyError.Code;
        if (code == null && childError != null) {
          code =
            childError.status ||
            childError.Status ||
            childError.code ||
            childError.Code;
        }

        const reason = anyError.reason || anyError.Reason;
        if (code == null && childError != null) {
          code = childError.reason || childError.Reason;
        }

        let message = anyError.message || anyError.Message;
        if (message == null && childError != null) {
          message = childError.message || childError.Message;
        }
        if (message == null && String.isString(anyError)) {
          message = anyError;
        }

        let messageDetail = anyError.messageDetail || anyError.MessageDetail;
        if (messageDetail == null && childError != null) {
          messageDetail = childError.messageDetail || childError.MessageDetail;
        }

        const codeText = String.isNullOrEmpty(code) ? '' : `Error ${code}: `;
        const reasonText = String.isNullOrEmpty(reason) ? '' : `(${reason}): `;
        text = `${codeText}${reasonText}${message || String.stringify(error)}`;
        header = header || reason || 'Unknown Error';

        let uri = anyError.uri || anyError.Uri || anyError.url || anyError.Url;
        if (uri == null && childError != null) {
          uri =
            childError.uri ||
            childError.Uri ||
            childError.url ||
            childError.Url;
        }

        content = (
          <div className="Alert-content">
            <div className="Alert-title">
              {// if there is a uri attached to the error then include it in the text
              String.isNullOrEmpty(code) ? null : (
                <span className="Alert-code">{`Error ${code}: `}</span>
              )}
              {// if there is a uri attached to the error then include it in the text
              String.isNullOrEmpty(reason) ? null : (
                <span className="Alert-code">{`${reason}`}</span>
              )}
            </div>
            <div className="Alert-text">
              {// if there is a uri attached to the error then include it in the text
              String.isNullOrEmpty(message) ? null : (
                <div className="Alert-message">{message}</div>
              )}
              {// if there is a uri attached to the error then include it in the text
              String.isNullOrEmpty(messageDetail) ? null : (
                <div className="Alert-messageDetail">{messageDetail}</div>
              )}
            </div>
            {// if there is a uri attached to the error then include it in the text
            String.isNullOrEmpty(uri) ? null : (
              <div className="Alert-uri">
                <a href={uri}>{uri}</a>
              </div>
            )}
          </div>
        );
      }

      // allow build to override default value
      if (DEBUG) {
        logErrorObject = true;
      }

      if (logErrorObject === true) {
        this.logger.error(`${header}: ${text}`, error);
      } else {
        this.logger.error(`${header}: ${text}`);
      }

      this.create(content, header, style, timeout);
    }
  }
}

export const Default = new Alert(PubSubInstance);

export function create(
  content: any,
  header?: string,
  style?: string,
  timeout?: number,
) {
  Default.create(content, header, style, timeout);
}

export type AlertCreator = typeof create;

export function createForError<TError>(
  error: TError,
  header?: string,
  style?: string,
  timeout?: number,
  formatter?: (e: TError) => any,
) {
  Default.createForError(error, header, style, timeout, formatter);
}

export type ErrorAlertCreator = typeof createForError;