import * as plugins from '../../../plugins.js';
import {
  customElement,
  DeesElement,
  html,
  cssManager,
  css,
  state,
  type TemplateResult,
} from '@design.estate/dees-element';

import sharedStyles, { accountDesignTokens, cardStyles, typographyStyles } from '../sharedstyles.js';
import * as accountState from '../../../states/accountstate.js';
import { IdpState } from '../../../states/idp.state.js';
import { BulkInviteModal } from '../bulk-invite-modal.js';

declare global {
  interface HTMLElementTagNameMap {
    'lele-accountview-users': UsersView;
  }
}

interface IMemberDisplay {
  userId: string;
  name: string;
  email: string;
  roles: string[];
  isOwner: boolean;
}

interface IInvitationDisplay {
  id: string;
  email: string;
  roles: string[];
  invitedAt: number;
  expiresAt: number;
}

@customElement('lele-accountview-users')
export class UsersView extends DeesElement {
  @state()
  accessor members: IMemberDisplay[] = [];

  @state()
  accessor invitations: IInvitationDisplay[] = [];

  @state()
  accessor loading: boolean = true;

  @state()
  accessor activeTab: 'members' | 'pending' | 'invite' = 'members';

  @state()
  accessor organizationId: string = '';

  @state()
  accessor organizationName: string = '';

  @state()
  accessor inviteEmail: string = '';

  @state()
  accessor inviteRoles: string[] = ['viewer'];

  @state()
  accessor isAdmin: boolean = false;

  @state()
  accessor isOwner: boolean = false;

  @state()
  accessor currentUserId: string = '';

  @state()
  accessor submitting: boolean = false;

  @state()
  accessor actionMessage: { type: 'success' | 'error'; text: string } | null = null;

  private static readonly AVAILABLE_ROLES = ['owner', 'admin', 'editor', 'viewer', 'guest'];

  private emailInputSubscribed: boolean = false;

  public static styles = [
    cssManager.defaultStyles,
    accountDesignTokens,
    cardStyles,
    typographyStyles,
    css`
      :host {
        display: block;
        padding: 48px;
        max-width: 1000px;
        margin: 0 auto;
      }

      .tabs {
        display: flex;
        gap: 4px;
        margin-bottom: 32px;
        border-bottom: 1px solid var(--border);
        padding-bottom: 8px;
      }

      .tab {
        padding: 10px 20px;
        border-radius: 8px 8px 0 0;
        font-size: 14px;
        font-weight: 500;
        color: var(--muted-foreground);
        cursor: pointer;
        transition: all 0.15s ease;
        border: none;
        background: transparent;
      }

      .tab:hover {
        color: var(--foreground);
        background: var(--muted);
      }

      .tab.active {
        color: var(--foreground);
        background: var(--muted);
      }

      .member-list {
        display: flex;
        flex-direction: column;
        gap: 12px;
      }

      .member-card {
        display: flex;
        align-items: center;
        justify-content: space-between;
        background: var(--card);
        border: 1px solid var(--border);
        border-radius: 12px;
        padding: 16px 20px;
        transition: all 0.15s ease;
      }

      .member-card:hover {
        border-color: var(--muted-foreground);
      }

      .member-info {
        display: flex;
        align-items: center;
        gap: 16px;
      }

      .member-avatar {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: var(--muted);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        font-weight: 600;
        color: var(--foreground);
      }

      .member-details {
        display: flex;
        flex-direction: column;
        gap: 2px;
      }

      .member-name {
        font-size: 14px;
        font-weight: 600;
        color: var(--foreground);
      }

      .member-email {
        font-size: 13px;
        color: var(--muted-foreground);
      }

      .member-roles {
        display: flex;
        gap: 6px;
        flex-wrap: wrap;
      }

      .role-badge {
        padding: 4px 10px;
        border-radius: 12px;
        font-size: 11px;
        font-weight: 500;
        text-transform: uppercase;
        letter-spacing: 0.05em;
      }

      .role-badge.owner {
        background: rgba(234, 179, 8, 0.2);
        color: #eab308;
      }

      .role-badge.admin {
        background: rgba(59, 130, 246, 0.2);
        color: #3b82f6;
      }

      .role-badge.editor {
        background: rgba(34, 197, 94, 0.2);
        color: #22c55e;
      }

      .role-badge.viewer {
        background: rgba(148, 163, 184, 0.2);
        color: #94a3b8;
      }

      .role-badge.guest {
        background: rgba(168, 162, 158, 0.2);
        color: #a8a29e;
      }

      .member-actions {
        display: flex;
        gap: 8px;
      }

      .action-button {
        padding: 8px 12px;
        border-radius: 6px;
        font-size: 12px;
        font-weight: 500;
        border: 1px solid var(--border);
        background: transparent;
        color: var(--muted-foreground);
        cursor: pointer;
        transition: all 0.15s ease;
      }

      .action-button:hover {
        border-color: var(--foreground);
        color: var(--foreground);
      }

      .action-button.danger:hover {
        border-color: #ef4444;
        color: #ef4444;
      }

      .action-button:disabled {
        opacity: 0.5;
        cursor: not-allowed;
      }

      .invitation-card {
        display: flex;
        align-items: center;
        justify-content: space-between;
        background: var(--card);
        border: 1px solid var(--border);
        border-radius: 12px;
        padding: 16px 20px;
      }

      .invitation-info {
        display: flex;
        flex-direction: column;
        gap: 4px;
      }

      .invitation-email {
        font-size: 14px;
        font-weight: 500;
        color: var(--foreground);
      }

      .invitation-meta {
        font-size: 12px;
        color: var(--muted-foreground);
      }

      .invite-form {
        background: var(--card);
        border: 1px solid var(--border);
        border-radius: 12px;
        padding: 24px;
      }

      .form-group {
        margin-bottom: 20px;
      }

      .form-label {
        display: block;
        font-size: 13px;
        font-weight: 500;
        color: var(--foreground);
        margin-bottom: 8px;
      }

      .role-selector {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
      }

      .role-option {
        padding: 8px 16px;
        border-radius: 8px;
        font-size: 13px;
        font-weight: 500;
        border: 1px solid var(--border);
        background: transparent;
        color: var(--muted-foreground);
        cursor: pointer;
        transition: all 0.15s ease;
      }

      .role-option:hover {
        border-color: var(--foreground);
        color: var(--foreground);
      }

      .role-option.selected {
        border-color: #3b82f6;
        background: rgba(59, 130, 246, 0.1);
        color: #3b82f6;
      }

      .message {
        padding: 12px 16px;
        border-radius: 8px;
        font-size: 13px;
        margin-bottom: 20px;
      }

      .message.success {
        background: rgba(34, 197, 94, 0.1);
        color: #22c55e;
        border: 1px solid rgba(34, 197, 94, 0.3);
      }

      .message.error {
        background: rgba(239, 68, 68, 0.1);
        color: #ef4444;
        border: 1px solid rgba(239, 68, 68, 0.3);
      }

      .empty-state {
        text-align: center;
        padding: 48px;
        color: var(--muted-foreground);
      }

      .empty-state dees-icon {
        font-size: 48px;
        opacity: 0.5;
        margin-bottom: 16px;
      }

      .loading {
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 48px;
        color: var(--muted-foreground);
      }

      .you-badge {
        font-size: 10px;
        padding: 2px 6px;
        background: rgba(59, 130, 246, 0.2);
        color: #3b82f6;
        border-radius: 4px;
        margin-left: 8px;
      }
    `,
  ];

  public render() {
    return html`
      <h1>Users</h1>
      <p>Manage members and invitations for ${this.organizationName || 'your organization'}.</p>

      ${this.actionMessage ? html`
        <div class="message ${this.actionMessage.type}">${this.actionMessage.text}</div>
      ` : ''}

      <div class="tabs">
        <button
          class="tab ${this.activeTab === 'members' ? 'active' : ''}"
          @click=${() => this.activeTab = 'members'}
        >
          Members (${this.members.length})
        </button>
        <button
          class="tab ${this.activeTab === 'pending' ? 'active' : ''}"
          @click=${() => this.activeTab = 'pending'}
        >
          Pending (${this.invitations.length})
        </button>
        ${this.isAdmin ? html`
          <button
            class="tab ${this.activeTab === 'invite' ? 'active' : ''}"
            @click=${() => this.activeTab = 'invite'}
          >
            Invite
          </button>
        ` : ''}
      </div>

      ${this.renderTabContent()}
    `;
  }

  private renderTabContent() {
    if (this.loading) {
      return html`
        <div class="loading">
          <span>Loading users...</span>
        </div>
      `;
    }

    switch (this.activeTab) {
      case 'members':
        return this.renderMembers();
      case 'pending':
        return this.renderPendingInvitations();
      case 'invite':
        return this.renderInviteForm();
    }
  }

  private renderMembers() {
    if (this.members.length === 0) {
      return html`
        <div class="empty-state">
          <dees-icon .icon=${'lucide:users'}></dees-icon>
          <h2>No Members</h2>
          <p>This organization has no members yet.</p>
        </div>
      `;
    }

    return html`
      <div class="member-list">
        ${this.members.map(member => html`
          <div class="member-card">
            <div class="member-info">
              <div class="member-avatar">
                ${member.name.charAt(0).toUpperCase()}
              </div>
              <div class="member-details">
                <span class="member-name">
                  ${member.name}
                  ${member.userId === this.currentUserId ? html`<span class="you-badge">You</span>` : ''}
                </span>
                <span class="member-email">${member.email}</span>
              </div>
            </div>
            <div class="member-roles">
              ${member.roles.map(role => html`
                <span class="role-badge ${role}">${role}</span>
              `)}
            </div>
            ${member.userId !== this.currentUserId ? html`
              <div class="member-actions">
                ${this.isOwner && !member.isOwner ? html`
                  <button
                    class="action-button"
                    @click=${() => this.handleTransferOwnership(member.userId, member.name)}
                    ?disabled=${this.submitting}
                    title="Transfer ownership to this member"
                  >
                    Transfer Ownership
                  </button>
                ` : ''}
                ${this.isAdmin ? html`
                  <button
                    class="action-button danger"
                    @click=${() => this.handleRemoveMember(member.userId, member.name)}
                    ?disabled=${this.submitting || member.isOwner}
                    title=${member.isOwner ? 'Cannot remove owner' : 'Remove member'}
                  >
                    Remove
                  </button>
                ` : ''}
              </div>
            ` : ''}
          </div>
        `)}
      </div>
    `;
  }

  private renderPendingInvitations() {
    if (this.invitations.length === 0) {
      return html`
        <div class="empty-state">
          <dees-icon .icon=${'lucide:mail'}></dees-icon>
          <h2>No Pending Invitations</h2>
          <p>There are no pending invitations for this organization.</p>
        </div>
      `;
    }

    return html`
      <div class="member-list">
        ${this.invitations.map(inv => html`
          <div class="invitation-card">
            <div class="invitation-info">
              <span class="invitation-email">${inv.email}</span>
              <span class="invitation-meta">
                Invited ${this.formatDate(inv.invitedAt)} · Expires ${this.formatDate(inv.expiresAt)}
              </span>
            </div>
            <div class="member-roles">
              ${inv.roles.map(role => html`
                <span class="role-badge ${role}">${role}</span>
              `)}
            </div>
            ${this.isAdmin ? html`
              <div class="member-actions">
                <button
                  class="action-button"
                  @click=${() => this.handleResendInvitation(inv.id)}
                  ?disabled=${this.submitting}
                >
                  Resend
                </button>
                <button
                  class="action-button danger"
                  @click=${() => this.handleCancelInvitation(inv.id, inv.email)}
                  ?disabled=${this.submitting}
                >
                  Cancel
                </button>
              </div>
            ` : ''}
          </div>
        `)}
      </div>
    `;
  }

  private renderInviteForm(): TemplateResult {
    return html`
      <div class="invite-form">
        <div class="form-group">
          <label class="form-label">Email Address</label>
          <dees-input-text
            .label=${''}
            .placeholder=${'Enter email address'}
            .value=${this.inviteEmail}
            ?disabled=${this.submitting}
          ></dees-input-text>
        </div>

        <div class="form-group">
          <label class="form-label">Role</label>
          <div class="role-selector">
            ${UsersView.AVAILABLE_ROLES.filter(r => r !== 'owner').map(role => html`
              <button
                class="role-option ${this.inviteRoles.includes(role) ? 'selected' : ''}"
                @click=${() => this.toggleRole(role)}
                ?disabled=${this.submitting}
              >
                ${role}
              </button>
            `)}
          </div>
        </div>

        <dees-button
          .text=${'Send Invitation'}
          .status=${this.submitting ? 'pending' : 'normal'}
          @click=${() => this.handleSendInvitation()}
        ></dees-button>

        <div style="margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--border);">
          <p style="color: var(--muted-foreground); font-size: 13px; margin: 0 0 12px 0;">
            Need to invite multiple people at once?
          </p>
          <dees-button
            .text=${'Import from CSV'}
            .type=${'secondary'}
            @click=${() => this.handleBulkImport()}
          ></dees-button>
        </div>
      </div>
    `;
  }

  public async firstUpdated() {
    await this.loadData();
  }

  public updated(changedProperties: Map<string, any>) {
    super.updated(changedProperties);

    // Subscribe to email input when Invite tab is shown
    if (this.activeTab === 'invite' && !this.emailInputSubscribed) {
      const emailInput = this.shadowRoot?.querySelector('.invite-form dees-input-text') as any;
      if (emailInput?.changeSubject) {
        emailInput.changeSubject.subscribe((element: any) => {
          this.inviteEmail = element.value;
        });
        this.emailInputSubscribed = true;
      }
    }
  }

  private async loadData() {
    this.loading = true;

    try {
      // Get the organization from URL
      const pathParts = window.location.pathname.split('/');
      const orgSlug = pathParts[3];

      const currentState = accountState.accountState.getState();
      const selectedOrg = currentState.organizations.find(org => org.data.slug === orgSlug);

      if (!selectedOrg) {
        console.error('Organization not found');
        this.loading = false;
        return;
      }

      this.organizationId = selectedOrg.id;
      this.organizationName = selectedOrg.data.name;
      this.currentUserId = currentState.user?.id || '';

      // Check if current user is admin/owner
      const currentUserRole = currentState.roles.find(
        r => r.data.organizationId === this.organizationId && r.data.userId === this.currentUserId
      );
      this.isAdmin = currentUserRole?.data?.roles?.some(r => ['owner', 'admin'].includes(r)) ?? false;
      this.isOwner = currentUserRole?.data?.roles?.includes('owner') ?? false;

      // Get JWT from IdpState
      const idpState = await IdpState.getSingletonInstance();
      const jwt = await idpState.idpClient.getJwt();

      // Fetch members
      const membersRequest = idpState.idpClient.typedsocket.createTypedRequest<plugins.idpInterfaces.request.IReq_GetOrgMembers>(
        'getOrgMembers'
      );

      const membersResponse = await membersRequest.fire({
        jwt,
        organizationId: this.organizationId,
      });

      this.members = membersResponse.members.map(m => ({
        userId: m.user.id,
        name: m.user.data.name || m.user.data.username || 'Unknown',
        email: m.user.data.email,
        roles: m.role.data.roles || [],
        isOwner: m.role.data.roles?.includes('owner') ?? false,
      }));

      // Fetch invitations if admin
      if (this.isAdmin) {
        const invitationsRequest = idpState.idpClient.typedsocket.createTypedRequest<plugins.idpInterfaces.request.IReq_GetOrgInvitations>(
          'getOrgInvitations'
        );

        const invitationsResponse = await invitationsRequest.fire({
          jwt,
          organizationId: this.organizationId,
        });

        this.invitations = invitationsResponse.invitations.map(inv => {
          const orgRef = inv.data.organizationRefs.find(ref => ref.organizationId === this.organizationId);
          return {
            id: inv.id,
            email: inv.data.email,
            roles: orgRef?.roles || [],
            invitedAt: orgRef?.invitedAt || inv.data.createdAt,
            expiresAt: inv.data.expiresAt,
          };
        });
      }

    } catch (error) {
      console.error('Error loading users:', error);
    } finally {
      this.loading = false;
    }
  }

  private toggleRole(role: string) {
    if (this.inviteRoles.includes(role)) {
      this.inviteRoles = this.inviteRoles.filter(r => r !== role);
    } else {
      this.inviteRoles = [...this.inviteRoles, role];
    }
    // Ensure at least one role is selected
    if (this.inviteRoles.length === 0) {
      this.inviteRoles = ['viewer'];
    }
  }

  private async handleSendInvitation() {
    if (!this.inviteEmail.trim()) {
      this.showMessage('error', 'Please enter an email address.');
      return;
    }

    if (this.inviteRoles.length === 0) {
      this.showMessage('error', 'Please select at least one role.');
      return;
    }

    this.submitting = true;
    this.actionMessage = null;

    try {
      const idpState = await IdpState.getSingletonInstance();
      const jwt = await idpState.idpClient.getJwt();

      const request = idpState.idpClient.typedsocket.createTypedRequest<plugins.idpInterfaces.request.IReq_CreateInvitation>(
        'createInvitation'
      );

      const response = await request.fire({
        jwt,
        organizationId: this.organizationId,
        email: this.inviteEmail.trim(),
        roles: this.inviteRoles,
      });

      if (response.success) {
        this.showMessage('success', response.message || 'Invitation sent successfully!');
        this.inviteEmail = '';
        this.inviteRoles = ['viewer'];
        await this.loadData();
        this.activeTab = 'pending';
      } else {
        this.showMessage('error', response.message || 'Failed to send invitation.');
      }
    } catch (error) {
      console.error('Error sending invitation:', error);
      this.showMessage('error', 'Failed to send invitation. Please try again.');
    } finally {
      this.submitting = false;
    }
  }

  private async handleResendInvitation(invitationId: string) {
    this.submitting = true;
    this.actionMessage = null;

    try {
      const idpState = await IdpState.getSingletonInstance();
      const jwt = await idpState.idpClient.getJwt();

      const request = idpState.idpClient.typedsocket.createTypedRequest<plugins.idpInterfaces.request.IReq_ResendInvitation>(
        'resendInvitation'
      );

      const response = await request.fire({
        jwt,
        organizationId: this.organizationId,
        invitationId,
      });

      if (response.success) {
        this.showMessage('success', 'Invitation resent successfully!');
        await this.loadData();
      } else {
        this.showMessage('error', response.message || 'Failed to resend invitation.');
      }
    } catch (error) {
      console.error('Error resending invitation:', error);
      this.showMessage('error', 'Failed to resend invitation. Please try again.');
    } finally {
      this.submitting = false;
    }
  }

  private async handleCancelInvitation(invitationId: string, email: string) {
    if (!confirm(`Cancel invitation for ${email}?`)) {
      return;
    }

    this.submitting = true;
    this.actionMessage = null;

    try {
      const idpState = await IdpState.getSingletonInstance();
      const jwt = await idpState.idpClient.getJwt();

      const request = idpState.idpClient.typedsocket.createTypedRequest<plugins.idpInterfaces.request.IReq_CancelInvitation>(
        'cancelInvitation'
      );

      const response = await request.fire({
        jwt,
        organizationId: this.organizationId,
        invitationId,
      });

      if (response.success) {
        this.showMessage('success', 'Invitation cancelled.');
        await this.loadData();
      } else {
        this.showMessage('error', response.message || 'Failed to cancel invitation.');
      }
    } catch (error) {
      console.error('Error cancelling invitation:', error);
      this.showMessage('error', 'Failed to cancel invitation. Please try again.');
    } finally {
      this.submitting = false;
    }
  }

  private async handleRemoveMember(userId: string, name: string) {
    if (!confirm(`Remove ${name} from this organization?`)) {
      return;
    }

    this.submitting = true;
    this.actionMessage = null;

    try {
      const idpState = await IdpState.getSingletonInstance();
      const jwt = await idpState.idpClient.getJwt();

      const request = idpState.idpClient.typedsocket.createTypedRequest<plugins.idpInterfaces.request.IReq_RemoveMember>(
        'removeMember'
      );

      const response = await request.fire({
        jwt,
        organizationId: this.organizationId,
        userId,
      });

      if (response.success) {
        this.showMessage('success', `${name} has been removed from the organization.`);
        await this.loadData();
      } else {
        this.showMessage('error', response.message || 'Failed to remove member.');
      }
    } catch (error) {
      console.error('Error removing member:', error);
      this.showMessage('error', 'Failed to remove member. Please try again.');
    } finally {
      this.submitting = false;
    }
  }

  private async handleTransferOwnership(newOwnerId: string, name: string) {
    const confirmed = await this.showTransferConfirmation(name);
    if (!confirmed) return;

    this.submitting = true;
    this.actionMessage = null;

    try {
      const idpState = await IdpState.getSingletonInstance();
      const jwt = await idpState.idpClient.getJwt();

      const request = idpState.idpClient.typedsocket.createTypedRequest<plugins.idpInterfaces.request.IReq_TransferOwnership>(
        'transferOwnership'
      );

      const response = await request.fire({
        jwt,
        organizationId: this.organizationId,
        newOwnerId,
      });

      if (response.success) {
        this.showMessage('success', `Ownership transferred to ${name}. You are now an admin.`);
        await this.loadData();
      } else {
        this.showMessage('error', response.message || 'Failed to transfer ownership.');
      }
    } catch (error) {
      console.error('Error transferring ownership:', error);
      this.showMessage('error', 'Failed to transfer ownership. Please try again.');
    } finally {
      this.submitting = false;
    }
  }

  private async showTransferConfirmation(name: string): Promise<boolean> {
    return new Promise((resolve) => {
      plugins.deesCatalog.DeesModal.createAndShow({
        heading: 'Transfer Ownership',
        content: html`
          <div style="padding: 16px 0;">
            <p style="margin: 0 0 12px 0;">Are you sure you want to transfer ownership to <strong>${name}</strong>?</p>
            <p style="margin: 0; color: var(--muted-foreground);">
              You will be demoted to admin role and will no longer be the owner of this organization.
            </p>
          </div>
        `,
        menuOptions: [
          { name: 'Cancel', action: async (modal) => { modal.destroy(); resolve(false); } },
          { name: 'Transfer Ownership', action: async (modal) => { modal.destroy(); resolve(true); } },
        ],
        width: 420,
      });
    });
  }

  private async handleBulkImport() {
    const result = await BulkInviteModal.show({
      organizationId: this.organizationId,
      organizationName: this.organizationName,
    });

    if (result && result.invitedCount > 0) {
      this.showMessage('success', `${result.invitedCount} invitation(s) sent successfully.`);
      await this.loadData();
      this.activeTab = 'pending';
    }
  }

  private showMessage(type: 'success' | 'error', text: string) {
    this.actionMessage = { type, text };
    // Auto-hide after 5 seconds
    setTimeout(() => {
      this.actionMessage = null;
    }, 5000);
  }

  private formatDate(timestamp: number): string {
    return new Date(timestamp).toLocaleDateString('en-US', {
      month: 'short',
      day: 'numeric',
      year: 'numeric',
    });
  }
}