/**
 * @file sdig-contract-parties.ts
 * @description Contract parties and roles management component
 */

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

import * as plugins from '../../plugins.js';

declare global {
  interface HTMLElementTagNameMap {
    'sdig-contract-parties': SdigContractParties;
  }
}

// Party role display configuration
const PARTY_ROLES: Array<{ value: plugins.sdInterfaces.TPartyRole; label: string; icon: string }> = [
  { value: 'signer', label: 'Signer', icon: 'lucide:pen-tool' },
  { value: 'witness', label: 'Witness', icon: 'lucide:eye' },
  { value: 'notary', label: 'Notary', icon: 'lucide:stamp' },
  { value: 'cc', label: 'CC (Copy)', icon: 'lucide:mail' },
  { value: 'approver', label: 'Approver', icon: 'lucide:check-circle' },
  { value: 'guarantor', label: 'Guarantor', icon: 'lucide:shield' },
  { value: 'beneficiary', label: 'Beneficiary', icon: 'lucide:user-check' },
];

const SIGNING_DEPENDENCIES: Array<{ value: plugins.sdInterfaces.TSigningDependency; label: string }> = [
  { value: 'none', label: 'No dependency' },
  { value: 'sequential', label: 'Sequential (in order)' },
  { value: 'parallel', label: 'Parallel (any order)' },
  { value: 'after_specific', label: 'After specific parties' },
];

@customElement('sdig-contract-parties')
export class SdigContractParties extends DeesElement {
  // ============================================================================
  // STATIC
  // ============================================================================

  public static demo = () => html`
    <sdig-contract-parties
      .contract=${plugins.sdDemodata.demoContract}
    ></sdig-contract-parties>
  `;

  public static styles = [
    cssManager.defaultStyles,
    css`
      :host {
        display: block;
      }

      .parties-container {
        display: flex;
        flex-direction: column;
        gap: 24px;
      }

      /* Section cards */
      .section-card {
        background: ${cssManager.bdTheme('#ffffff', '#0a0a0a')};
        border: 1px solid ${cssManager.bdTheme('#e5e5e5', '#27272a')};
        border-radius: 12px;
        overflow: hidden;
      }

      .section-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 16px 20px;
        background: ${cssManager.bdTheme('#f9fafb', '#111111')};
        border-bottom: 1px solid ${cssManager.bdTheme('#e5e5e5', '#27272a')};
      }

      .section-title {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 15px;
        font-weight: 600;
        color: ${cssManager.bdTheme('#111111', '#fafafa')};
      }

      .section-title dees-icon {
        font-size: 18px;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
      }

      .section-content {
        padding: 20px;
      }

      /* Roles list */
      .roles-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 16px;
      }

      .role-card {
        display: flex;
        flex-direction: column;
        padding: 16px;
        background: ${cssManager.bdTheme('#f9fafb', '#111111')};
        border: 1px solid ${cssManager.bdTheme('#e5e5e5', '#27272a')};
        border-radius: 10px;
        transition: all 0.15s ease;
      }

      .role-card:hover {
        border-color: ${cssManager.bdTheme('#d1d5db', '#3f3f46')};
      }

      .role-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 12px;
      }

      .role-name {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 15px;
        font-weight: 600;
        color: ${cssManager.bdTheme('#111111', '#fafafa')};
      }

      .role-name dees-icon {
        font-size: 16px;
        padding: 6px;
        background: ${cssManager.bdTheme('#e5e7eb', '#27272a')};
        border-radius: 6px;
      }

      .role-badge {
        font-size: 11px;
        font-weight: 500;
        padding: 2px 8px;
        border-radius: 4px;
        background: ${cssManager.bdTheme('#dbeafe', '#1e3a5f')};
        color: ${cssManager.bdTheme('#1e40af', '#93c5fd')};
      }

      .role-description {
        font-size: 13px;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
        margin-bottom: 12px;
      }

      .role-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        font-size: 12px;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
      }

      .role-meta-item {
        display: flex;
        align-items: center;
        gap: 4px;
      }

      /* Parties list */
      .parties-list {
        display: flex;
        flex-direction: column;
        gap: 16px;
      }

      .party-card {
        display: flex;
        align-items: flex-start;
        gap: 16px;
        padding: 16px;
        background: ${cssManager.bdTheme('#f9fafb', '#111111')};
        border: 1px solid ${cssManager.bdTheme('#e5e5e5', '#27272a')};
        border-radius: 10px;
        transition: all 0.15s ease;
      }

      .party-card:hover {
        border-color: ${cssManager.bdTheme('#d1d5db', '#3f3f46')};
      }

      .party-card.selected {
        border-color: ${cssManager.bdTheme('#3b82f6', '#60a5fa')};
        background: ${cssManager.bdTheme('#eff6ff', '#172554')};
      }

      .party-avatar {
        width: 48px;
        height: 48px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        font-weight: 600;
        color: white;
        flex-shrink: 0;
      }

      .party-info {
        flex: 1;
        min-width: 0;
      }

      .party-name {
        font-size: 15px;
        font-weight: 600;
        color: ${cssManager.bdTheme('#111111', '#fafafa')};
        margin-bottom: 4px;
      }

      .party-role-tag {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        padding: 2px 8px;
        border-radius: 4px;
        font-size: 11px;
        font-weight: 500;
        background: ${cssManager.bdTheme('#e5e7eb', '#27272a')};
        color: ${cssManager.bdTheme('#374151', '#d1d5db')};
        margin-bottom: 8px;
      }

      .party-details {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
        font-size: 13px;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
      }

      .party-detail {
        display: flex;
        align-items: center;
        gap: 6px;
      }

      .party-detail dees-icon {
        font-size: 14px;
      }

      .party-status {
        display: flex;
        flex-direction: column;
        align-items: flex-end;
        gap: 8px;
      }

      .signature-status {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 4px 10px;
        border-radius: 9999px;
        font-size: 12px;
        font-weight: 500;
      }

      .signature-status.pending {
        background: ${cssManager.bdTheme('#fef3c7', '#422006')};
        color: ${cssManager.bdTheme('#92400e', '#fcd34d')};
      }

      .signature-status.signed {
        background: ${cssManager.bdTheme('#d1fae5', '#064e3b')};
        color: ${cssManager.bdTheme('#065f46', '#6ee7b7')};
      }

      .signature-status.declined {
        background: ${cssManager.bdTheme('#fee2e2', '#450a0a')};
        color: ${cssManager.bdTheme('#991b1b', '#fca5a5')};
      }

      .signing-order {
        display: flex;
        align-items: center;
        gap: 4px;
        font-size: 12px;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
      }

      .order-number {
        width: 24px;
        height: 24px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 12px;
        font-weight: 600;
        background: ${cssManager.bdTheme('#e5e7eb', '#27272a')};
        color: ${cssManager.bdTheme('#374151', '#d1d5db')};
      }

      /* Add button */
      .add-button {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 20px;
        background: transparent;
        border: 2px dashed ${cssManager.bdTheme('#d1d5db', '#3f3f46')};
        border-radius: 10px;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
        font-size: 14px;
        font-weight: 500;
        cursor: pointer;
        transition: all 0.15s ease;
      }

      .add-button:hover {
        border-color: ${cssManager.bdTheme('#9ca3af', '#52525b')};
        color: ${cssManager.bdTheme('#374151', '#d1d5db')};
        background: ${cssManager.bdTheme('#f9fafb', '#18181b')};
      }

      /* Empty state */
      .empty-state {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 40px 20px;
        text-align: center;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
      }

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

      .empty-state h4 {
        margin: 0 0 8px;
        font-size: 16px;
        font-weight: 600;
        color: ${cssManager.bdTheme('#374151', '#d1d5db')};
      }

      .empty-state p {
        margin: 0;
        font-size: 14px;
      }

      /* Action buttons */
      .action-buttons {
        display: flex;
        gap: 8px;
      }

      .btn {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 8px 14px;
        font-size: 13px;
        font-weight: 500;
        border-radius: 6px;
        border: none;
        cursor: pointer;
        transition: all 0.15s ease;
      }

      .btn-sm {
        padding: 6px 10px;
        font-size: 12px;
      }

      .btn-primary {
        background: ${cssManager.bdTheme('#111111', '#fafafa')};
        color: ${cssManager.bdTheme('#ffffff', '#09090b')};
      }

      .btn-primary:hover {
        background: ${cssManager.bdTheme('#333333', '#e5e5e5')};
      }

      .btn-secondary {
        background: ${cssManager.bdTheme('#f3f4f6', '#27272a')};
        color: ${cssManager.bdTheme('#374151', '#d1d5db')};
      }

      .btn-secondary:hover {
        background: ${cssManager.bdTheme('#e5e7eb', '#3f3f46')};
      }

      .btn-ghost {
        background: transparent;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
      }

      .btn-ghost:hover {
        background: ${cssManager.bdTheme('#f3f4f6', '#27272a')};
        color: ${cssManager.bdTheme('#111111', '#fafafa')};
      }
    `,
  ];

  // ============================================================================
  // PROPERTIES
  // ============================================================================

  @property({ type: Object })
  public accessor contract: plugins.sdInterfaces.IPortableContract | null = null;

  @property({ type: Boolean })
  public accessor readonly: boolean = false;

  // ============================================================================
  // STATE
  // ============================================================================

  @state()
  private accessor selectedPartyId: string | null = null;

  @state()
  private accessor showRoleEditor: boolean = false;

  @state()
  private accessor showPartyEditor: boolean = false;

  // ============================================================================
  // EVENT HANDLERS
  // ============================================================================

  private handleFieldChange(path: string, value: unknown) {
    this.dispatchEvent(
      new CustomEvent('field-change', {
        detail: { path, value },
        bubbles: true,
        composed: true,
      })
    );
  }

  private handleSelectParty(partyId: string) {
    this.selectedPartyId = this.selectedPartyId === partyId ? null : partyId;
    this.dispatchEvent(
      new CustomEvent('party-select', {
        detail: { partyId: this.selectedPartyId },
        bubbles: true,
        composed: true,
      })
    );
  }

  private handleAddRole() {
    this.showRoleEditor = true;
    // TODO: Open role editor modal
  }

  private handleAddParty() {
    this.showPartyEditor = true;
    // TODO: Open party editor modal
  }

  private handleRemoveParty(partyId: string) {
    if (!this.contract) return;
    const updatedParties = this.contract.involvedParties.filter((p) => p.partyId !== partyId);
    this.handleFieldChange('involvedParties', updatedParties);
  }

  // ============================================================================
  // HELPERS
  // ============================================================================

  private getPartyDisplayName(party: plugins.sdInterfaces.IInvolvedParty): string {
    if (!party) return 'Unknown Party';
    const contact = party.contact;
    if (!contact) return party.deliveryEmail || 'Unknown Party';
    if ('name' in contact && contact.name) {
      return contact.name as string;
    }
    if ('firstName' in contact && 'lastName' in contact) {
      return `${contact.firstName || ''} ${contact.lastName || ''}`.trim() || party.deliveryEmail || 'Unknown Party';
    }
    return party.deliveryEmail || 'Unknown Party';
  }

  private getPartyInitials(party: plugins.sdInterfaces.IInvolvedParty): string {
    const name = this.getPartyDisplayName(party);
    if (!name || name.length === 0) return '??';
    const parts = name.split(' ');
    if (parts.length >= 2 && parts[0].length > 0 && parts[parts.length - 1].length > 0) {
      return (parts[0][0] + parts[parts.length - 1][0]).toUpperCase();
    }
    return name.substring(0, Math.min(2, name.length)).toUpperCase();
  }

  private getPartyColor(party: plugins.sdInterfaces.IInvolvedParty): string {
    // Generate a consistent color based on party ID
    const colors = [
      '#3b82f6', '#10b981', '#f59e0b', '#ef4444', '#8b5cf6',
      '#ec4899', '#06b6d4', '#84cc16', '#f97316', '#6366f1',
    ];
    const idStr = party?.partyId || 'default';
    const hash = idStr.split('').reduce((a, b) => a + b.charCodeAt(0), 0);
    return colors[hash % colors.length];
  }

  private getRoleName(roleId: string): string {
    if (!roleId) return 'Unknown Role';
    const role = this.contract?.availableRoles.find((r) => r.id === roleId);
    return role?.name || roleId.charAt(0).toUpperCase() + roleId.slice(1);
  }

  private getSignatureStatusClass(status: string): string {
    if (status === 'signed') return 'signed';
    if (status === 'declined') return 'declined';
    return 'pending';
  }

  private formatSignatureStatus(status: string): string {
    return status.charAt(0).toUpperCase() + status.slice(1);
  }

  // ============================================================================
  // RENDER
  // ============================================================================

  public render(): TemplateResult {
    if (!this.contract) {
      return html`<div>No contract loaded</div>`;
    }

    const roles = this.contract.availableRoles;
    const parties = this.contract.involvedParties;

    return html`
      <div class="parties-container">
        <!-- Roles Section -->
        <div class="section-card">
          <div class="section-header">
            <div class="section-title">
              <dees-icon .iconFA=${'lucide:users-2'}></dees-icon>
              Available Roles
            </div>
            ${!this.readonly
              ? html`
                  <button class="btn btn-secondary btn-sm" @click=${this.handleAddRole}>
                    <dees-icon .iconFA=${'lucide:plus'}></dees-icon>
                    Add Role
                  </button>
                `
              : ''}
          </div>
          <div class="section-content">
            ${roles.length > 0
              ? html`
                  <div class="roles-grid">
                    ${roles.map((role) => this.renderRoleCard(role))}
                  </div>
                `
              : html`
                  <div class="empty-state">
                    <dees-icon .iconFA=${'lucide:users'}></dees-icon>
                    <h4>No Roles Defined</h4>
                    <p>Add roles to define the types of parties in this contract</p>
                  </div>
                `}
          </div>
        </div>

        <!-- Parties Section -->
        <div class="section-card">
          <div class="section-header">
            <div class="section-title">
              <dees-icon .iconFA=${'lucide:user-plus'}></dees-icon>
              Involved Parties (${parties.length})
            </div>
            ${!this.readonly
              ? html`
                  <button class="btn btn-primary btn-sm" @click=${this.handleAddParty}>
                    <dees-icon .iconFA=${'lucide:plus'}></dees-icon>
                    Add Party
                  </button>
                `
              : ''}
          </div>
          <div class="section-content">
            ${parties.length > 0
              ? html`
                  <div class="parties-list">
                    ${parties.map((party) => this.renderPartyCard(party))}
                  </div>
                `
              : html`
                  <div class="empty-state">
                    <dees-icon .iconFA=${'lucide:user-plus'}></dees-icon>
                    <h4>No Parties Added</h4>
                    <p>Add parties who will be involved in this contract</p>
                  </div>
                `}
          </div>
        </div>
      </div>
    `;
  }

  private renderRoleCard(role: plugins.sdInterfaces.IRole): TemplateResult {
    return html`
      <div class="role-card">
        <div class="role-header">
          <div class="role-name">
            <dees-icon
              .iconFA=${role.icon || 'lucide:user'}
              style="color: ${role.displayColor || 'inherit'}"
            ></dees-icon>
            ${role.name}
          </div>
          <span class="role-badge">${role.category}</span>
        </div>
        <div class="role-description">${role.description || 'No description'}</div>
        <div class="role-meta">
          ${role.signatureRequired
            ? html`
                <span class="role-meta-item">
                  <dees-icon .iconFA=${'lucide:pen-tool'}></dees-icon>
                  Signature required
                </span>
              `
            : ''}
          ${role.defaultSigningOrder > 0
            ? html`
                <span class="role-meta-item">
                  <dees-icon .iconFA=${'lucide:list-ordered'}></dees-icon>
                  Order: ${role.defaultSigningOrder}
                </span>
              `
            : ''}
          ${role.minParties
            ? html`
                <span class="role-meta-item">
                  <dees-icon .iconFA=${'lucide:users'}></dees-icon>
                  Min: ${role.minParties}${role.maxParties ? `, Max: ${role.maxParties}` : ''}
                </span>
              `
            : ''}
        </div>
      </div>
    `;
  }

  private renderPartyCard(party: plugins.sdInterfaces.IInvolvedParty): TemplateResult {
    // Handle both full IInvolvedParty and minimal demo data
    const partyId = (party as any).partyId || (party as any).role || 'unknown';
    const roleId = (party as any).roleId || (party as any).role || '';
    const partyRole = (party as any).partyRole || 'signer';
    const signatureStatus = (party as any).signature?.status || 'pending';
    const signingOrder = (party as any).signingOrder || 0;
    const deliveryEmail = (party as any).deliveryEmail;
    const deliveryPhone = (party as any).deliveryPhone;
    const actingAsProxy = (party as any).actingAsProxy;

    const isSelected = this.selectedPartyId === partyId;

    return html`
      <div
        class="party-card ${isSelected ? 'selected' : ''}"
        @click=${() => this.handleSelectParty(partyId)}
      >
        <div
          class="party-avatar"
          style="background: ${this.getPartyColor(party)}"
        >
          ${this.getPartyInitials(party)}
        </div>

        <div class="party-info">
          <div class="party-name">${this.getPartyDisplayName(party)}</div>
          <div class="party-role-tag">
            ${this.getRoleName(roleId)} (${PARTY_ROLES.find((r) => r.value === partyRole)?.label || partyRole})
          </div>
          <div class="party-details">
            ${deliveryEmail
              ? html`
                  <div class="party-detail">
                    <dees-icon .iconFA=${'lucide:mail'}></dees-icon>
                    ${deliveryEmail}
                  </div>
                `
              : ''}
            ${deliveryPhone
              ? html`
                  <div class="party-detail">
                    <dees-icon .iconFA=${'lucide:phone'}></dees-icon>
                    ${deliveryPhone}
                  </div>
                `
              : ''}
            ${actingAsProxy
              ? html`
                  <div class="party-detail">
                    <dees-icon .iconFA=${'lucide:users'}></dees-icon>
                    Acting as proxy
                  </div>
                `
              : ''}
          </div>
        </div>

        <div class="party-status">
          <span class="signature-status ${this.getSignatureStatusClass(signatureStatus)}">
            ${this.formatSignatureStatus(signatureStatus)}
          </span>
          ${signingOrder > 0
            ? html`
                <div class="signing-order">
                  <span class="order-number">${signingOrder}</span>
                  <span>Signing order</span>
                </div>
              `
            : ''}
        </div>
      </div>
    `;
  }
}