import { Component, linkEvent } from 'inferno';
import { Link } from 'inferno-router';
import { CommentNode as CommentNodeI, CommentLikeForm, CommentForm as CommentFormI, SaveCommentForm, BanFromCommunityForm, BanUserForm, CommunityUser, UserView, AddModToCommunityForm, AddAdminForm, TransferCommunityForm, TransferSiteForm } from '../interfaces';
import { WebSocketService, UserService } from '../services';
import { mdToHtml, getUnixTime, canMod, isMod } from '../utils';
import * as moment from 'moment';
import { MomentTime } from './moment-time';
import { CommentForm } from './comment-form';
import { CommentNodes } from './comment-nodes';
import { i18n } from '../i18next';
import { T } from 'inferno-i18next';

enum BanType {Community, Site};

interface CommentNodeState {
  showReply: boolean;
  showEdit: boolean;
  showRemoveDialog: boolean;
  removeReason: string;
  showBanDialog: boolean;
  banReason: string;
  banExpires: string;
  banType: BanType;
  collapsed: boolean;
  showConfirmTransferSite: boolean;
  showConfirmTransferCommunity: boolean;
}

interface CommentNodeProps {
  node: CommentNodeI;
  noIndent?: boolean;
  viewOnly?: boolean;
  locked?: boolean;
  markable?: boolean;
  moderators: Array<CommunityUser>;
  admins: Array<UserView>;
}

export class CommentNode extends Component<CommentNodeProps, CommentNodeState> {

  private emptyState: CommentNodeState = {
    showReply: false,
    showEdit: false,
    showRemoveDialog: false,
    removeReason: null,
    showBanDialog: false,
    banReason: null,
    banExpires: null,
    banType: BanType.Community,
    collapsed: false,
    showConfirmTransferSite: false,
    showConfirmTransferCommunity: false,
  }

  constructor(props: any, context: any) {
    super(props, context);

    this.state = this.emptyState;
    this.handleReplyCancel = this.handleReplyCancel.bind(this);
    this.handleCommentLike = this.handleCommentLike.bind(this);
    this.handleCommentDisLike = this.handleCommentDisLike.bind(this);
  }

  render() {
    let node = this.props.node;
    return (
      <div className={`comment ${node.comment.parent_id  && !this.props.noIndent ? 'ml-4' : ''}`}>
        {!this.state.collapsed && 
          <div className={`vote-bar mr-2 float-left small text-center ${this.props.viewOnly && 'no-click'}`}>
            <button className={`btn p-0 ${node.comment.my_vote == 1 ? 'text-info' : 'text-muted'}`} onClick={linkEvent(node, this.handleCommentLike)}>
              <svg class="icon upvote"><use xlinkHref="#icon-arrow-up"></use></svg>
            </button>
            <div class={`font-weight-bold text-muted`}>{node.comment.score}</div>
            <button className={`btn p-0 ${node.comment.my_vote == -1 ? 'text-danger' : 'text-muted'}`} onClick={linkEvent(node, this.handleCommentDisLike)}>
              <svg class="icon downvote"><use xlinkHref="#icon-arrow-down"></use></svg>
            </button>
          </div>
        }
        <div id={`comment-${node.comment.id}`} className={`details comment-node ml-4 ${this.isCommentNew ? 'mark' : ''}`}>
          <ul class="list-inline mb-0 text-muted small">
            <li className="list-inline-item">
              <Link className="text-info" to={`/u/${node.comment.creator_name}`}>{node.comment.creator_name}</Link>
            </li>
            {this.isMod && 
              <li className="list-inline-item badge badge-light"><T i18nKey="mod">#</T></li>
            }
            {this.isAdmin && 
              <li className="list-inline-item badge badge-light"><T i18nKey="admin">#</T></li>
            }
            <li className="list-inline-item">
              <span>(
                <span className="text-info">+{node.comment.upvotes}</span>
                <span> | </span>
                <span className="text-danger">-{node.comment.downvotes}</span>
                <span>) </span>
              </span>
            </li>
            <li className="list-inline-item">
              <span><MomentTime data={node.comment} /></span>
            </li>
            <li className="list-inline-item">
              <div className="pointer text-monospace" onClick={linkEvent(this, this.handleCommentCollapse)}>{this.state.collapsed ? '[+]' : '[-]'}</div>
            </li>
          </ul>
          {this.state.showEdit && <CommentForm node={node} edit onReplyCancel={this.handleReplyCancel} disabled={this.props.locked} />}
          {!this.state.showEdit && !this.state.collapsed &&
            <div>
              <div className="md-div" dangerouslySetInnerHTML={mdToHtml(node.comment.removed ? `*${i18n.t('removed')}*` : node.comment.deleted ? `*${i18n.t('deleted')}*` : node.comment.content)} />
              <ul class="list-inline mb-1 text-muted small font-weight-bold">
                {UserService.Instance.user && !this.props.viewOnly && 
                  <>
                    <li className="list-inline-item">
                      <span class="pointer" onClick={linkEvent(this, this.handleReplyClick)}><T i18nKey="reply">#</T></span>
                    </li>
                    <li className="list-inline-item mr-2">
                      <span class="pointer" onClick={linkEvent(this, this.handleSaveCommentClick)}>{node.comment.saved ? i18n.t('unsave') : i18n.t('save')}</span>
                    </li>
                    {this.myComment && 
                      <>
                        <li className="list-inline-item">
                          <span class="pointer" onClick={linkEvent(this, this.handleEditClick)}><T i18nKey="edit">#</T></span>
                        </li>
                        <li className="list-inline-item">
                          <span class="pointer" onClick={linkEvent(this, this.handleDeleteClick)}>
                            {!this.props.node.comment.deleted ? i18n.t('delete') : i18n.t('restore')}
                          </span>
                        </li>
                      </>
                    }
                    {/* Admins and mods can remove comments */}
                    {this.canMod && 
                      <li className="list-inline-item">
                        {!this.props.node.comment.removed ? 
                        <span class="pointer" onClick={linkEvent(this, this.handleModRemoveShow)}><T i18nKey="remove">#</T></span> :
                        <span class="pointer" onClick={linkEvent(this, this.handleModRemoveSubmit)}><T i18nKey="restore">#</T></span>
                        }
                      </li>
                    }
                    {/* Mods can ban from community, and appoint as mods to community */}
                    {this.canMod &&
                      <>
                        {!this.isMod && 
                          <li className="list-inline-item">
                            {!this.props.node.comment.banned_from_community ? 
                            <span class="pointer" onClick={linkEvent(this, this.handleModBanFromCommunityShow)}><T i18nKey="ban">#</T></span> :
                            <span class="pointer" onClick={linkEvent(this, this.handleModBanFromCommunitySubmit)}><T i18nKey="unban">#</T></span>
                            }
                          </li>
                        }
                        {!this.props.node.comment.banned_from_community &&
                          <li className="list-inline-item">
                            <span class="pointer" onClick={linkEvent(this, this.handleAddModToCommunity)}>{this.isMod ? i18n.t('remove_as_mod') : i18n.t('appoint_as_mod')}</span>
                          </li>
                        }
                      </>
                    }
                    {/* Community creators and admins can transfer community to another mod */}
                    {(this.amCommunityCreator || this.canAdmin) && this.isMod &&
                      <li className="list-inline-item">
                        {!this.state.showConfirmTransferCommunity ?
                        <span class="pointer" onClick={linkEvent(this, this.handleShowConfirmTransferCommunity)}><T i18nKey="transfer_community">#</T>
                      </span> : <>
                        <span class="d-inline-block mr-1"><T i18nKey="are_you_sure">#</T></span>
                        <span class="pointer d-inline-block mr-1" onClick={linkEvent(this, this.handleTransferCommunity)}><T i18nKey="yes">#</T></span>
                        <span class="pointer d-inline-block" onClick={linkEvent(this, this.handleCancelShowConfirmTransferCommunity)}><T i18nKey="no">#</T></span>
                      </>
                        }
                      </li>
                    }
                    {/* Admins can ban from all, and appoint other admins */}
                    {this.canAdmin &&
                      <>
                        {!this.isAdmin && 
                          <li className="list-inline-item">
                            {!this.props.node.comment.banned ? 
                            <span class="pointer" onClick={linkEvent(this, this.handleModBanShow)}><T i18nKey="ban_from_site">#</T></span> :
                            <span class="pointer" onClick={linkEvent(this, this.handleModBanSubmit)}><T i18nKey="unban_from_site">#</T></span>
                            }
                          </li>
                        }
                        {!this.props.node.comment.banned &&
                          <li className="list-inline-item">
                            <span class="pointer" onClick={linkEvent(this, this.handleAddAdmin)}>{this.isAdmin ? i18n.t('remove_as_admin') : i18n.t('appoint_as_admin')}</span>
                          </li>
                        }
                      </>
                    }
                    {/* Site Creator can transfer to another admin */}
                    {this.amSiteCreator && this.isAdmin &&
                      <li className="list-inline-item">
                        {!this.state.showConfirmTransferSite ?
                        <span class="pointer" onClick={linkEvent(this, this.handleShowConfirmTransferSite)}><T i18nKey="transfer_site">#</T>
                      </span> : <>
                        <span class="d-inline-block mr-1"><T i18nKey="are_you_sure">#</T></span>
                        <span class="pointer d-inline-block mr-1" onClick={linkEvent(this, this.handleTransferSite)}><T i18nKey="yes">#</T></span>
                        <span class="pointer d-inline-block" onClick={linkEvent(this, this.handleCancelShowConfirmTransferSite)}><T i18nKey="no">#</T></span>
                      </>
                        }
                      </li>
                    }
                  </>
                }
                <li className="list-inline-item">
                  <Link className="text-muted" to={`/post/${node.comment.post_id}/comment/${node.comment.id}`}><T i18nKey="link">#</T></Link>
                </li>
                {this.props.markable && 
                  <li className="list-inline-item">
                    <span class="pointer" onClick={linkEvent(this, this.handleMarkRead)}>{node.comment.read ? i18n.t('mark_as_unread') : i18n.t('mark_as_read')}</span>
                  </li>
                }
              </ul>
            </div>
          }
        </div>
        {this.state.showRemoveDialog && 
          <form class="form-inline" onSubmit={linkEvent(this, this.handleModRemoveSubmit)}>
            <input type="text" class="form-control mr-2" placeholder={i18n.t('reason')} value={this.state.removeReason} onInput={linkEvent(this, this.handleModRemoveReasonChange)} />
            <button type="submit" class="btn btn-secondary"><T i18nKey="remove_comment">#</T></button>
          </form>
        }
        {this.state.showBanDialog && 
          <form onSubmit={linkEvent(this, this.handleModBanBothSubmit)}>
            <div class="form-group row">
              <label class="col-form-label"><T i18nKey="reason">#</T></label>
              <input type="text" class="form-control mr-2" placeholder={i18n.t('reason')} value={this.state.banReason} onInput={linkEvent(this, this.handleModBanReasonChange)} />
            </div>
            {/* TODO hold off on expires until later */}
            {/* <div class="form-group row"> */}
            {/*   <label class="col-form-label">Expires</label> */}
            {/*   <input type="date" class="form-control mr-2" placeholder={i18n.t('expires')} value={this.state.banExpires} onInput={linkEvent(this, this.handleModBanExpiresChange)} /> */}
            {/* </div> */}
            <div class="form-group row">
              <button type="submit" class="btn btn-secondary">{i18n.t('ban')} {this.props.node.comment.creator_name}</button>
            </div>
          </form>
        }
        {this.state.showReply && 
          <CommentForm 
            node={node} 
            onReplyCancel={this.handleReplyCancel} 
            disabled={this.props.locked} 
          />
        }
        {this.props.node.children && !this.state.collapsed &&
          <CommentNodes 
            nodes={this.props.node.children} 
            locked={this.props.locked} 
            moderators={this.props.moderators}
            admins={this.props.admins}
          />
        }
        {/* A collapsed clearfix */}
        {this.state.collapsed && <div class="row col-12"></div>}
      </div>
    )
  }

  get myComment(): boolean {
    return UserService.Instance.user && this.props.node.comment.creator_id == UserService.Instance.user.id;
  }

  get isMod(): boolean {
    return this.props.moderators && isMod(this.props.moderators.map(m => m.user_id), this.props.node.comment.creator_id);
  }

  get isAdmin(): boolean {
    return this.props.admins && isMod(this.props.admins.map(a => a.id), this.props.node.comment.creator_id);
  }

  get canMod(): boolean {

    if (this.props.admins && this.props.moderators) {
      let adminsThenMods = this.props.admins.map(a => a.id)
      .concat(this.props.moderators.map(m => m.user_id));

      return canMod(UserService.Instance.user, adminsThenMods, this.props.node.comment.creator_id);
      } else { 
      return false;
    }
  }

  get canAdmin(): boolean {
    return this.props.admins && canMod(UserService.Instance.user, this.props.admins.map(a => a.id), this.props.node.comment.creator_id);
  }

  get amCommunityCreator(): boolean {
    return this.props.moderators && 
      UserService.Instance.user && 
      (this.props.node.comment.creator_id != UserService.Instance.user.id) &&
      (UserService.Instance.user.id == this.props.moderators[0].user_id);
  }

  get amSiteCreator(): boolean {
    return this.props.admins && 
      UserService.Instance.user && 
      (this.props.node.comment.creator_id != UserService.Instance.user.id) &&
      (UserService.Instance.user.id == this.props.admins[0].id);
  }

  handleReplyClick(i: CommentNode) {
    i.state.showReply = true;
    i.setState(i.state);
  }

  handleEditClick(i: CommentNode) {
    i.state.showEdit = true;
    i.setState(i.state);
  }

  handleDeleteClick(i: CommentNode) {
    let deleteForm: CommentFormI = {
      content: i.props.node.comment.content,
      edit_id: i.props.node.comment.id,
      creator_id: i.props.node.comment.creator_id,
      post_id: i.props.node.comment.post_id,
      parent_id: i.props.node.comment.parent_id,
      deleted: !i.props.node.comment.deleted,
      auth: null
    };
    WebSocketService.Instance.editComment(deleteForm);
  }

  handleSaveCommentClick(i: CommentNode) {
    let saved = (i.props.node.comment.saved == undefined) ? true : !i.props.node.comment.saved;
    let form: SaveCommentForm = {
      comment_id: i.props.node.comment.id,
      save: saved
    };

    WebSocketService.Instance.saveComment(form);
  }

  handleReplyCancel() {
    this.state.showReply = false;
    this.state.showEdit = false;
    this.setState(this.state);
  }


  handleCommentLike(i: CommentNodeI) {

    let form: CommentLikeForm = {
      comment_id: i.comment.id,
      post_id: i.comment.post_id,
      score: (i.comment.my_vote == 1) ? 0 : 1
    };
    WebSocketService.Instance.likeComment(form);
  }

  handleCommentDisLike(i: CommentNodeI) {
    let form: CommentLikeForm = {
      comment_id: i.comment.id,
      post_id: i.comment.post_id,
      score: (i.comment.my_vote == -1) ? 0 : -1
    };
    WebSocketService.Instance.likeComment(form);
  }

  handleModRemoveShow(i: CommentNode) {
    i.state.showRemoveDialog = true;
    i.setState(i.state);
  }

  handleModRemoveReasonChange(i: CommentNode, event: any) {
    i.state.removeReason = event.target.value;
    i.setState(i.state);
  }

  handleModRemoveSubmit(i: CommentNode) {
    event.preventDefault();
    let form: CommentFormI = {
      content: i.props.node.comment.content,
      edit_id: i.props.node.comment.id,
      creator_id: i.props.node.comment.creator_id,
      post_id: i.props.node.comment.post_id,
      parent_id: i.props.node.comment.parent_id,
      removed: !i.props.node.comment.removed,
      reason: i.state.removeReason,
      auth: null
    };
    WebSocketService.Instance.editComment(form);

    i.state.showRemoveDialog = false;
    i.setState(i.state);
  }

  handleMarkRead(i: CommentNode) {
    let form: CommentFormI = {
      content: i.props.node.comment.content,
      edit_id: i.props.node.comment.id,
      creator_id: i.props.node.comment.creator_id,
      post_id: i.props.node.comment.post_id,
      parent_id: i.props.node.comment.parent_id,
      read: !i.props.node.comment.read,
      auth: null
    };
    WebSocketService.Instance.editComment(form);
  }


  handleModBanFromCommunityShow(i: CommentNode) {
    i.state.showBanDialog = true;
    i.state.banType = BanType.Community;
    i.setState(i.state);
  }

  handleModBanShow(i: CommentNode) {
    i.state.showBanDialog = true;
    i.state.banType = BanType.Site;
    i.setState(i.state);
  }

  handleModBanReasonChange(i: CommentNode, event: any) {
    i.state.banReason = event.target.value;
    i.setState(i.state);
  }

  handleModBanExpiresChange(i: CommentNode, event: any) {
    i.state.banExpires = event.target.value;
    i.setState(i.state);
  }

  handleModBanFromCommunitySubmit(i: CommentNode) {
    i.state.banType = BanType.Community;
    i.setState(i.state);
    i.handleModBanBothSubmit(i);
  }

  handleModBanSubmit(i: CommentNode) {
    i.state.banType = BanType.Site;
    i.setState(i.state);
    i.handleModBanBothSubmit(i);
  }

  handleModBanBothSubmit(i: CommentNode) {
    event.preventDefault();

    if (i.state.banType == BanType.Community) {
      let form: BanFromCommunityForm = {
        user_id: i.props.node.comment.creator_id,
        community_id: i.props.node.comment.community_id,
        ban: !i.props.node.comment.banned_from_community,
        reason: i.state.banReason,
        expires: getUnixTime(i.state.banExpires),
      };
      WebSocketService.Instance.banFromCommunity(form);
    } else {
      let form: BanUserForm = {
        user_id: i.props.node.comment.creator_id,
        ban: !i.props.node.comment.banned,
        reason: i.state.banReason,
        expires: getUnixTime(i.state.banExpires),
      };
      WebSocketService.Instance.banUser(form);
    }

    i.state.showBanDialog = false;
    i.setState(i.state);
  }

  handleAddModToCommunity(i: CommentNode) {
    let form: AddModToCommunityForm = {
      user_id: i.props.node.comment.creator_id,
      community_id: i.props.node.comment.community_id,
      added: !i.isMod,
    };
    WebSocketService.Instance.addModToCommunity(form);
    i.setState(i.state);
  }

  handleAddAdmin(i: CommentNode) {
    let form: AddAdminForm = {
      user_id: i.props.node.comment.creator_id,
      added: !i.isAdmin,
    };
    WebSocketService.Instance.addAdmin(form);
    i.setState(i.state);
  }

  handleShowConfirmTransferCommunity(i: CommentNode) { 
    i.state.showConfirmTransferCommunity = true;
    i.setState(i.state);
  }

  handleCancelShowConfirmTransferCommunity(i: CommentNode) { 
    i.state.showConfirmTransferCommunity = false;
    i.setState(i.state);
  }

  handleTransferCommunity(i: CommentNode) {
    let form: TransferCommunityForm = {
      community_id: i.props.node.comment.community_id,
      user_id: i.props.node.comment.creator_id,
    };
    WebSocketService.Instance.transferCommunity(form);
    i.state.showConfirmTransferCommunity = false;
    i.setState(i.state);
  }

  handleShowConfirmTransferSite(i: CommentNode) { 
    i.state.showConfirmTransferSite = true;
    i.setState(i.state);
  }

  handleCancelShowConfirmTransferSite(i: CommentNode) { 
    i.state.showConfirmTransferSite = false;
    i.setState(i.state);
  }

  handleTransferSite(i: CommentNode) {
    let form: TransferSiteForm = {
      user_id: i.props.node.comment.creator_id,
    };
    WebSocketService.Instance.transferSite(form);
    i.state.showConfirmTransferSite = false;
    i.setState(i.state);
  }

  get isCommentNew(): boolean {
    let now = moment.utc().subtract(10, 'minutes');
    let then = moment.utc(this.props.node.comment.published);
    return now.isBefore(then);
  }

  handleCommentCollapse(i: CommentNode) {
    i.state.collapsed = !i.state.collapsed;
    i.setState(i.state);
  }
}