/**
 * @file sdig-contract-signatures.ts
 * @description Contract signature fields manager 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-signatures': SdigContractSignatures;
  }
}

// Signature field interface (for future interface updates)
interface ISignatureField {
  id: string;
  name: string;
  assignedPartyId: string | null;
  roleId: string;
  type: 'signature' | 'initials' | 'date' | 'text';
  required: boolean;
  status: 'pending' | 'ready' | 'signed' | 'declined';
  signedAt?: number;
  signatureData?: any;
  position: {
    paragraphId?: string;
    pageNumber?: number;
    x: number;
    y: number;
  };
}

// Signature status configuration
const SIGNATURE_STATUSES = [
  { value: 'pending', label: 'Pending', color: '#f59e0b', icon: 'lucide:clock' },
  { value: 'ready', label: 'Ready to Sign', color: '#3b82f6', icon: 'lucide:pen-tool' },
  { value: 'signed', label: 'Signed', color: '#10b981', icon: 'lucide:check-circle' },
  { value: 'declined', label: 'Declined', color: '#ef4444', icon: 'lucide:x-circle' },
];

const FIELD_TYPES = [
  { value: 'signature', label: 'Full Signature', icon: 'lucide:pen-tool' },
  { value: 'initials', label: 'Initials', icon: 'lucide:type' },
  { value: 'date', label: 'Date', icon: 'lucide:calendar' },
  { value: 'text', label: 'Text Field', icon: 'lucide:text-cursor' },
];

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

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

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

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

      /* Summary cards */
      .summary-row {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
        gap: 16px;
      }

      .summary-card {
        display: flex;
        flex-direction: column;
        gap: 8px;
        padding: 20px;
        background: ${cssManager.bdTheme('#ffffff', '#0a0a0a')};
        border: 1px solid ${cssManager.bdTheme('#e5e5e5', '#27272a')};
        border-radius: 12px;
      }

      .summary-card-icon {
        width: 40px;
        height: 40px;
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
      }

      .summary-card-icon.pending {
        background: ${cssManager.bdTheme('#fef3c7', '#422006')};
        color: ${cssManager.bdTheme('#f59e0b', '#fcd34d')};
      }

      .summary-card-icon.ready {
        background: ${cssManager.bdTheme('#dbeafe', '#1e3a5f')};
        color: ${cssManager.bdTheme('#3b82f6', '#60a5fa')};
      }

      .summary-card-icon.signed {
        background: ${cssManager.bdTheme('#d1fae5', '#064e3b')};
        color: ${cssManager.bdTheme('#10b981', '#34d399')};
      }

      .summary-card-icon.declined {
        background: ${cssManager.bdTheme('#fee2e2', '#450a0a')};
        color: ${cssManager.bdTheme('#ef4444', '#f87171')};
      }

      .summary-card-value {
        font-size: 28px;
        font-weight: 700;
        color: ${cssManager.bdTheme('#111111', '#fafafa')};
      }

      .summary-card-label {
        font-size: 13px;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
      }

      /* Section card */
      .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;
      }

      /* Signature fields list */
      .fields-list {
        display: flex;
        flex-direction: column;
        gap: 12px;
      }

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

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

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

      .field-icon {
        width: 44px;
        height: 44px;
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        background: ${cssManager.bdTheme('#e5e7eb', '#27272a')};
        color: ${cssManager.bdTheme('#374151', '#d1d5db')};
        flex-shrink: 0;
      }

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

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

      .field-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 13px;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
      }

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

      .field-meta-item dees-icon {
        font-size: 14px;
      }

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

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

      .field-status.ready {
        background: ${cssManager.bdTheme('#dbeafe', '#1e3a5f')};
        color: ${cssManager.bdTheme('#1e40af', '#93c5fd')};
      }

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

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

      .field-actions {
        display: flex;
        gap: 8px;
        flex-shrink: 0;
      }

      /* Signer progress */
      .signers-section {
        margin-top: 24px;
      }

      .signers-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 16px;
      }

      .signer-card {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 16px;
        background: ${cssManager.bdTheme('#f9fafb', '#111111')};
        border: 1px solid ${cssManager.bdTheme('#e5e5e5', '#27272a')};
        border-radius: 10px;
      }

      .signer-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;
      }

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

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

      .signer-role {
        font-size: 13px;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
        margin-bottom: 8px;
      }

      .signer-progress {
        display: flex;
        align-items: center;
        gap: 8px;
      }

      .progress-bar {
        flex: 1;
        height: 6px;
        background: ${cssManager.bdTheme('#e5e7eb', '#27272a')};
        border-radius: 3px;
        overflow: hidden;
      }

      .progress-fill {
        height: 100%;
        background: ${cssManager.bdTheme('#10b981', '#34d399')};
        transition: width 0.3s ease;
      }

      .progress-text {
        font-size: 12px;
        font-weight: 500;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
        min-width: 36px;
        text-align: right;
      }

      /* Signature preview */
      .signature-preview {
        position: relative;
        padding: 24px;
        background: ${cssManager.bdTheme('#f9fafb', '#111111')};
        border: 1px solid ${cssManager.bdTheme('#e5e5e5', '#27272a')};
        border-radius: 10px;
        text-align: center;
      }

      .signature-preview-label {
        font-size: 12px;
        font-weight: 500;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
        margin-bottom: 12px;
      }

      .signature-preview-image {
        max-width: 200px;
        max-height: 80px;
        margin: 0 auto;
      }

      .signature-preview-placeholder {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 8px;
        color: ${cssManager.bdTheme('#9ca3af', '#6b7280')};
      }

      .signature-preview-placeholder dees-icon {
        font-size: 32px;
        opacity: 0.5;
      }

      /* Empty state */
      .empty-state {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 48px 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 0 20px;
        font-size: 14px;
      }

      /* Buttons */
      .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')};
        padding: 6px;
      }

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

      .btn-success {
        background: ${cssManager.bdTheme('#10b981', '#059669')};
        color: white;
      }

      .btn-success:hover {
        background: ${cssManager.bdTheme('#059669', '#047857')};
      }

      /* Type badge */
      .type-badge {
        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')};
      }

      /* Signing order */
      .signing-order-badge {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 24px;
        height: 24px;
        border-radius: 50%;
        font-size: 12px;
        font-weight: 600;
        background: ${cssManager.bdTheme('#dbeafe', '#1e3a5f')};
        color: ${cssManager.bdTheme('#1e40af', '#93c5fd')};
      }
    `,
  ];

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

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

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

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

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

  // Demo signature fields data
  @state()
  private accessor signatureFields: ISignatureField[] = [];

  // ============================================================================
  // LIFECYCLE
  // ============================================================================

  public async firstUpdated() {
    // Generate demo signature fields based on contract parties
    if (this.contract && this.contract.involvedParties.length > 0) {
      this.signatureFields = this.contract.involvedParties.map((party, index) => ({
        id: `sig-${index + 1}`,
        name: `Signature - ${this.getPartyRoleName(party.role)}`,
        assignedPartyId: null,
        roleId: party.role,
        type: 'signature' as const,
        required: true,
        status: index === 0 ? 'signed' : index === 1 ? 'ready' : 'pending',
        signedAt: index === 0 ? Date.now() - 86400000 : undefined,
        position: { x: 0, y: 0 },
      }));
    }
  }

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

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

  private handleSelectField(fieldId: string) {
    this.selectedFieldId = this.selectedFieldId === fieldId ? null : fieldId;
  }

  private handleAddField() {
    const newField: ISignatureField = {
      id: `sig-${Date.now()}`,
      name: 'New Signature Field',
      assignedPartyId: null,
      roleId: '',
      type: 'signature',
      required: true,
      status: 'pending',
      position: { x: 0, y: 0 },
    };
    this.signatureFields = [...this.signatureFields, newField];
  }

  private handleDeleteField(fieldId: string) {
    this.signatureFields = this.signatureFields.filter((f) => f.id !== fieldId);
    if (this.selectedFieldId === fieldId) {
      this.selectedFieldId = null;
    }
  }

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

  private getPartyRoleName(roleId: string): string {
    const role = this.contract?.availableRoles.find((r) => r.id === roleId);
    return role?.name || roleId;
  }

  private getStatusConfig(status: string) {
    return SIGNATURE_STATUSES.find((s) => s.value === status) || SIGNATURE_STATUSES[0];
  }

  private getFieldTypeConfig(type: string) {
    return FIELD_TYPES.find((t) => t.value === type) || FIELD_TYPES[0];
  }

  private getSignatureStats() {
    const total = this.signatureFields.length;
    const signed = this.signatureFields.filter((f) => f.status === 'signed').length;
    const ready = this.signatureFields.filter((f) => f.status === 'ready').length;
    const pending = this.signatureFields.filter((f) => f.status === 'pending').length;
    const declined = this.signatureFields.filter((f) => f.status === 'declined').length;
    return { total, signed, ready, pending, declined };
  }

  private getPartyColor(index: number): string {
    const colors = ['#3b82f6', '#10b981', '#f59e0b', '#ef4444', '#8b5cf6', '#ec4899'];
    return colors[index % colors.length];
  }

  private formatDate(timestamp: number): string {
    return new Date(timestamp).toLocaleDateString('en-US', {
      year: 'numeric',
      month: 'short',
      day: 'numeric',
      hour: '2-digit',
      minute: '2-digit',
    });
  }

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

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

    const stats = this.getSignatureStats();

    return html`
      <div class="signatures-container">
        <!-- Summary Cards -->
        <div class="summary-row">
          <div class="summary-card">
            <div class="summary-card-icon pending">
              <dees-icon .iconFA=${'lucide:clock'}></dees-icon>
            </div>
            <div class="summary-card-value">${stats.pending}</div>
            <div class="summary-card-label">Pending</div>
          </div>
          <div class="summary-card">
            <div class="summary-card-icon ready">
              <dees-icon .iconFA=${'lucide:pen-tool'}></dees-icon>
            </div>
            <div class="summary-card-value">${stats.ready}</div>
            <div class="summary-card-label">Ready to Sign</div>
          </div>
          <div class="summary-card">
            <div class="summary-card-icon signed">
              <dees-icon .iconFA=${'lucide:check-circle'}></dees-icon>
            </div>
            <div class="summary-card-value">${stats.signed}</div>
            <div class="summary-card-label">Signed</div>
          </div>
          <div class="summary-card">
            <div class="summary-card-icon declined">
              <dees-icon .iconFA=${'lucide:x-circle'}></dees-icon>
            </div>
            <div class="summary-card-value">${stats.declined}</div>
            <div class="summary-card-label">Declined</div>
          </div>
        </div>

        <!-- Signature Fields Section -->
        <div class="section-card">
          <div class="section-header">
            <div class="section-title">
              <dees-icon .iconFA=${'lucide:pen-tool'}></dees-icon>
              Signature Fields
            </div>
            ${!this.readonly
              ? html`
                  <button class="btn btn-primary" @click=${this.handleAddField}>
                    <dees-icon .iconFA=${'lucide:plus'}></dees-icon>
                    Add Field
                  </button>
                `
              : ''}
          </div>
          <div class="section-content">
            ${this.signatureFields.length > 0
              ? html`
                  <div class="fields-list">
                    ${this.signatureFields.map((field, index) => this.renderSignatureField(field, index))}
                  </div>
                `
              : html`
                  <div class="empty-state">
                    <dees-icon .iconFA=${'lucide:pen-tool'}></dees-icon>
                    <h4>No Signature Fields</h4>
                    <p>Add signature fields to define where parties should sign the contract</p>
                    ${!this.readonly
                      ? html`
                          <button class="btn btn-primary" @click=${this.handleAddField}>
                            <dees-icon .iconFA=${'lucide:plus'}></dees-icon>
                            Add Signature Field
                          </button>
                        `
                      : ''}
                  </div>
                `}
          </div>
        </div>

        <!-- Signers Progress Section -->
        ${this.contract.involvedParties.length > 0
          ? html`
              <div class="section-card">
                <div class="section-header">
                  <div class="section-title">
                    <dees-icon .iconFA=${'lucide:users'}></dees-icon>
                    Signers Progress
                  </div>
                </div>
                <div class="section-content">
                  <div class="signers-grid">
                    ${this.contract.involvedParties.map((party, index) => this.renderSignerCard(party, index))}
                  </div>
                </div>
              </div>
            `
          : ''}
      </div>
    `;
  }

  private renderSignatureField(field: ISignatureField, index: number): TemplateResult {
    const isSelected = this.selectedFieldId === field.id;
    const statusConfig = this.getStatusConfig(field.status);
    const typeConfig = this.getFieldTypeConfig(field.type);

    return html`
      <div
        class="field-card ${isSelected ? 'selected' : ''}"
        @click=${() => this.handleSelectField(field.id)}
      >
        <div class="signing-order-badge">${index + 1}</div>

        <div class="field-icon">
          <dees-icon .iconFA=${typeConfig.icon}></dees-icon>
        </div>

        <div class="field-info">
          <div class="field-name">${field.name}</div>
          <div class="field-meta">
            <span class="field-meta-item">
              <dees-icon .iconFA=${'lucide:user'}></dees-icon>
              ${this.getPartyRoleName(field.roleId)}
            </span>
            <span class="type-badge">
              <dees-icon .iconFA=${typeConfig.icon}></dees-icon>
              ${typeConfig.label}
            </span>
            ${field.required
              ? html`
                  <span class="field-meta-item">
                    <dees-icon .iconFA=${'lucide:asterisk'}></dees-icon>
                    Required
                  </span>
                `
              : ''}
            ${field.signedAt
              ? html`
                  <span class="field-meta-item">
                    <dees-icon .iconFA=${'lucide:calendar'}></dees-icon>
                    ${this.formatDate(field.signedAt)}
                  </span>
                `
              : ''}
          </div>
        </div>

        <div class="field-status ${field.status}">
          <dees-icon .iconFA=${statusConfig.icon}></dees-icon>
          ${statusConfig.label}
        </div>

        ${!this.readonly
          ? html`
              <div class="field-actions">
                <button class="btn btn-ghost" @click=${(e: Event) => { e.stopPropagation(); }} title="Edit">
                  <dees-icon .iconFA=${'lucide:pencil'}></dees-icon>
                </button>
                <button
                  class="btn btn-ghost"
                  @click=${(e: Event) => { e.stopPropagation(); this.handleDeleteField(field.id); }}
                  title="Delete"
                  style="color: #ef4444;"
                >
                  <dees-icon .iconFA=${'lucide:trash-2'}></dees-icon>
                </button>
              </div>
            `
          : ''}
      </div>
    `;
  }

  private renderSignerCard(party: plugins.sdInterfaces.IInvolvedParty, index: number): TemplateResult {
    const partyFields = this.signatureFields.filter((f) => f.roleId === party.role);
    const signedFields = partyFields.filter((f) => f.status === 'signed').length;
    const totalFields = partyFields.length;
    const progress = totalFields > 0 ? Math.round((signedFields / totalFields) * 100) : 0;
    const roleName = this.getPartyRoleName(party.role);

    return html`
      <div class="signer-card">
        <div class="signer-avatar" style="background: ${this.getPartyColor(index)}">
          ${roleName.charAt(0).toUpperCase()}
        </div>
        <div class="signer-info">
          <div class="signer-name">${roleName}</div>
          <div class="signer-role">${signedFields} of ${totalFields} signatures</div>
          <div class="signer-progress">
            <div class="progress-bar">
              <div class="progress-fill" style="width: ${progress}%"></div>
            </div>
            <span class="progress-text">${progress}%</span>
          </div>
        </div>
      </div>
    `;
  }
}