import { Component, signal } from '@angular/core';
import { CommonModule } from '@angular/common';
import { RouterLink } from '@angular/router';
import { FormsModule } from '@angular/forms';


interface DocSection {
  id: string;
  icon: string;
  title: string;
  description: string;
  articles: { title: string; badge?: string; badgeColor?: string }[];
}

@Component({
  selector: 'app-docs',
  standalone: true,
  imports: [CommonModule, RouterLink, FormsModule],
  template: `
    <div class="docs-page">

      <!-- Hero -->
      <div class="docs-hero">
        <div class="hero-content">
          <span class="hero-eyebrow">Documentation</span>
          <h1>Everything you need to get started</h1>
          <p>Guides, references, and tutorials for the MediCode platform.</p>

          <!-- Search bar -->
          <div class="docs-search">
            <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
              <circle cx="11" cy="11" r="8"/><path d="m21 21-4.35-4.35"/>
            </svg>
            <input
              type="text"
              placeholder="Search documentation…"
            [(ngModel)]="searchQuery"
            />
            <kbd>⌘K</kbd>
          </div>
        </div>

        <div class="hero-graphic">
          <div class="graphic-badge badge-icd">ICD-10</div>
          <div class="graphic-badge badge-cpt">CPT</div>
          <div class="graphic-badge badge-api">REST API</div>
          <div class="graphic-ring"></div>
        </div>
      </div>

      <!-- Quick links -->
      <div class="quick-links">
        @for (q of quickLinks; track q.title) {
          <div class="quick-card" [class]="'quick-' + q.color">
            <div class="quick-icon" [innerHTML]="q.icon"></div>
            <div>
              <div class="quick-title">{{ q.title }}</div>
              <div class="quick-sub">{{ q.sub }}</div>
            </div>
            <svg class="quick-arrow" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
              <path d="M5 12h14M12 5l7 7-7 7"/>
            </svg>
          </div>
        }
      </div>

      <!-- Main content -->
      <div class="docs-body">

        <!-- Sidebar TOC -->
        <aside class="docs-toc">
          <div class="toc-title">On this page</div>
          @for (s of sections; track s.id) {
            <a
              class="toc-link"
              [class.active]="activeSection() === s.id"
              (click)="scrollTo(s.id)"
            >
              {{ s.title }}
            </a>
          }
        </aside>

        <!-- Sections -->
        <div class="docs-content">
          @for (s of sections; track s.id) {
            <section [id]="s.id" class="doc-section">
              <div class="section-header">
                <div class="section-icon" [innerHTML]="s.icon"></div>
                <div>
                  <h2>{{ s.title }}</h2>
                  <p>{{ s.description }}</p>
                </div>
              </div>
              <div class="articles-grid">
                @for (a of s.articles; track a.title) {
                  <div class="article-card">
                    <div class="article-top">
                      <span class="article-title">{{ a.title }}</span>
                      @if (a.badge) {
                        <span class="article-badge" [class]="'badge-' + a.badgeColor">{{ a.badge }}</span>
                      }
                    </div>
                    <svg class="article-arrow" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                      <path d="M5 12h14M12 5l7 7-7 7"/>
                    </svg>
                  </div>
                }
              </div>
            </section>
          }
        </div>
      </div>

      <!-- Help banner -->
      <div class="help-banner">
        <div class="help-text">
          <h3>Can't find what you're looking for?</h3>
          <p>Our support team is available Monday–Friday, 9am–6pm EST.</p>
        </div>
        <div class="help-actions">
          <a href="mailto:support@medicode.io" class="btn-outline">✉️ Email Support</a>
          <a routerLink="/api" class="btn-primary">View API Docs</a>
        </div>
      </div>

    </div>
  `,
  styles: [`
    .docs-page {
      padding: 0;
      max-width: 1400px;
      margin: 0 auto;
      font-family: 'Inter', system-ui, sans-serif;
    }

    /* ── Hero ──────────────────────────────────────── */
    .docs-hero {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 3rem 2rem 2.5rem;
      background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
      border-bottom: 1px solid #bae6fd;
      position: relative;
      overflow: hidden;
    }

    .hero-content { max-width: 540px; }

    .hero-eyebrow {
      font-size: 0.75rem;
      font-weight: 700;
      color: #0EA5E9;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      display: block;
      margin-bottom: 0.75rem;
    }

    .docs-hero h1 {
      font-size: 2rem;
      font-weight: 800;
      color: #0f172a;
      margin: 0 0 0.75rem;
      line-height: 1.2;
      letter-spacing: -0.02em;
    }

    .docs-hero p {
      color: #475569;
      margin: 0 0 1.5rem;
      font-size: 1rem;
    }

    .docs-search {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      background: white;
      border: 1.5px solid #bae6fd;
      border-radius: 10px;
      padding: 0.75rem 1rem;
      max-width: 420px;
      box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    }
    .docs-search svg { width: 18px; height: 18px; color: #94a3b8; flex-shrink: 0; }
    .docs-search input {
      flex: 1;
      border: none;
      outline: none;
      font-size: 0.9rem;
      color: #0f172a;
      background: transparent;
    }
    .docs-search input::placeholder { color: #94a3b8; }
    .docs-search kbd {
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
      border-radius: 5px;
      font-size: 0.7rem;
      color: #64748b;
      padding: 0.15rem 0.4rem;
    }

    /* Decorative graphic */
    .hero-graphic {
      position: relative;
      width: 200px;
      height: 200px;
      flex-shrink: 0;
      display: none;
    }
    @media (min-width: 900px) { .hero-graphic { display: block; } }

    .graphic-ring {
      width: 160px;
      height: 160px;
      border-radius: 50%;
      border: 2px dashed #bae6fd;
      position: absolute;
      top: 20px;
      left: 20px;
      animation: spin 20s linear infinite;
    }
    @keyframes spin { to { transform: rotate(360deg); } }

    .graphic-badge {
      position: absolute;
      font-size: 0.7rem;
      font-weight: 700;
      padding: 0.35rem 0.75rem;
      border-radius: 99px;
      letter-spacing: 0.04em;
    }
    .badge-icd { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; top: 20px; left: 30px; }
    .badge-cpt { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; bottom: 30px; left: 10px; }
    .badge-api { background: #faf5ff; color: #7c3aed; border: 1px solid #ddd6fe; top: 50%; right: 0; transform: translateY(-50%); }

    /* ── Quick links ───────────────────────────────── */
    .quick-links {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
      gap: 1rem;
      padding: 2rem 2rem 0;
    }

    .quick-card {
      display: flex;
      align-items: center;
      gap: 1rem;
      padding: 1.1rem 1.25rem;
      border-radius: 12px;
      border: 1px solid #e2e8f0;
      background: white;
      cursor: pointer;
      transition: all 0.15s;
    }
    .quick-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.08); }

    .quick-icon {
      width: 38px;
      height: 38px;
      border-radius: 9px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .quick-icon :deep(svg) { width: 20px; height: 20px; }

    .quick-blue .quick-icon { background: #eff6ff; color: #3b82f6; }
    .quick-green .quick-icon { background: #f0fdf4; color: #10b981; }
    .quick-purple .quick-icon { background: #faf5ff; color: #8b5cf6; }
    .quick-sky .quick-icon { background: #f0f9ff; color: #0EA5E9; }

    .quick-title { font-size: 0.9rem; font-weight: 600; color: #0f172a; }
    .quick-sub { font-size: 0.78rem; color: #64748b; margin-top: 0.15rem; }

    .quick-arrow { width: 16px; height: 16px; color: #94a3b8; margin-left: auto; flex-shrink: 0; }

    /* ── Body layout ───────────────────────────────── */
    .docs-body {
      display: grid;
      grid-template-columns: 220px 1fr;
      gap: 2rem;
      padding: 2rem;
      align-items: start;
    }

    /* TOC */
    .docs-toc {
      position: sticky;
      top: 1.5rem;
      display: flex;
      flex-direction: column;
      gap: 0.25rem;
    }
    .toc-title {
      font-size: 0.7rem;
      font-weight: 700;
      color: #94a3b8;
      text-transform: uppercase;
      letter-spacing: 0.1em;
      margin-bottom: 0.5rem;
    }
    .toc-link {
      font-size: 0.85rem;
      color: #64748b;
      cursor: pointer;
      padding: 0.35rem 0.75rem;
      border-radius: 6px;
      border-left: 2px solid transparent;
      transition: all 0.12s;
    }
    .toc-link:hover { color: #0EA5E9; background: #f0f9ff; }
    .toc-link.active { color: #0EA5E9; border-left-color: #0EA5E9; background: #f0f9ff; font-weight: 600; }

    /* Sections */
    .docs-content { display: flex; flex-direction: column; gap: 2.5rem; }

    .doc-section { scroll-margin-top: 1.5rem; }

    .section-header {
      display: flex;
      align-items: flex-start;
      gap: 1rem;
      margin-bottom: 1.25rem;
    }
    .section-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: #f0f9ff;
      color: #0EA5E9;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .section-icon :deep(svg) { width: 22px; height: 22px; }

    .section-header h2 {
      font-size: 1.1rem;
      font-weight: 700;
      color: #0f172a;
      margin: 0 0 0.25rem;
    }
    .section-header p {
      font-size: 0.85rem;
      color: #64748b;
      margin: 0;
    }

    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 0.75rem;
    }

    .article-card {
      background: white;
      border: 1px solid #e2e8f0;
      border-radius: 10px;
      padding: 1rem 1.1rem;
      cursor: pointer;
      transition: all 0.15s;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 0.75rem;
    }
    .article-card:hover {
      border-color: #0EA5E9;
      box-shadow: 0 0 0 3px rgba(14,165,233,0.08);
    }

    .article-top { display: flex; flex-direction: column; gap: 0.35rem; }
    .article-title { font-size: 0.875rem; font-weight: 600; color: #1e293b; }

    .article-badge {
      font-size: 0.65rem;
      font-weight: 700;
      padding: 0.15rem 0.45rem;
      border-radius: 99px;
      width: fit-content;
    }
    .badge-green { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }
    .badge-blue  { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; }
    .badge-sky   { background: #f0f9ff; color: #0369a1; border: 1px solid #bae6fd; }
    .badge-purple{ background: #faf5ff; color: #7c3aed; border: 1px solid #ddd6fe; }

    .article-arrow { width: 15px; height: 15px; color: #cbd5e1; flex-shrink: 0; transition: color 0.15s; }
    .article-card:hover .article-arrow { color: #0EA5E9; }

    /* ── Help banner ───────────────────────────────── */
    .help-banner {
      margin: 0 2rem 2rem;
      background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
      border-radius: 14px;
      padding: 2rem 2.5rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 2rem;
      flex-wrap: wrap;
    }
    .help-banner h3 { font-size: 1.1rem; font-weight: 700; color: #f8fafc; margin: 0 0 0.35rem; }
    .help-banner p  { font-size: 0.875rem; color: #94a3b8; margin: 0; }

    .help-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

    .btn-primary {
      padding: 0.65rem 1.25rem;
      background: #0EA5E9;
      color: white;
      border-radius: 8px;
      font-weight: 600;
      font-size: 0.875rem;
      text-decoration: none;
      transition: background 0.15s;
    }
    .btn-primary:hover { background: #0284c7; }

    .btn-outline {
      padding: 0.65rem 1.25rem;
      background: transparent;
      color: #cbd5e1;
      border: 1px solid #334155;
      border-radius: 8px;
      font-weight: 600;
      font-size: 0.875rem;
      text-decoration: none;
      transition: all 0.15s;
    }
    .btn-outline:hover { border-color: #94a3b8; color: #f1f5f9; }

    @media (max-width: 900px) {
      .docs-body { grid-template-columns: 1fr; }
      .docs-toc { display: none; }
    }
  `],
})
export class DocsComponent {
  searchQuery = '';
  activeSection = signal('getting-started');

  scrollTo(id: string) {
    this.activeSection.set(id);
    document.getElementById(id)?.scrollIntoView({ behavior: 'smooth' });
  }

  quickLinks = [
    {
      title: 'Getting Started',
      sub: '5-minute setup guide',
      color: 'blue',
      icon: `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M13 2L3 14h9l-1 8 10-12h-9l1-8z"/></svg>`,
    },
    {
      title: 'ICD-10 Reference',
      sub: 'Diagnostic code lookup',
      color: 'green',
      icon: `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M4 19.5A2.5 2.5 0 0 1 6.5 17H20"/><path d="M6.5 2H20v20H6.5A2.5 2.5 0 0 1 4 19.5v-15A2.5 2.5 0 0 1 6.5 2z"/></svg>`,
    },
    {
      title: 'CPT Codes',
      sub: 'Procedure coding guide',
      color: 'purple',
      icon: `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M9 11l3 3L22 4"/><path d="M21 12v7a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11"/></svg>`,
    },
    {
      title: 'API Reference',
      sub: 'REST endpoints & auth',
      color: 'sky',
      icon: `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><polyline points="16 18 22 12 16 6"/><polyline points="8 6 2 12 8 18"/></svg>`,
    },
  ];

  sections: DocSection[] = [
    {
      id: 'getting-started',
      title: 'Getting Started',
      description: 'Everything you need to set up and configure MediCode for your practice.',
      icon: `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M13 2L3 14h9l-1 8 10-12h-9l1-8z"/></svg>`,
      articles: [
        { title: 'Platform Overview', badge: 'Start here', badgeColor: 'green' },
        { title: 'Creating Your Account' },
        { title: 'Roles & Permissions', badge: 'Admin', badgeColor: 'purple' },
        { title: 'Onboarding Checklist' },
      ],
    },
    {
      id: 'patients',
      title: 'Patient Management',
      description: 'How to create, update, and manage patient records and encounters.',
      icon: `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"/><circle cx="9" cy="7" r="4"/></svg>`,
      articles: [
        { title: 'Adding a New Patient' },
        { title: 'Encounter Workflow', badge: 'Core', badgeColor: 'blue' },
        { title: 'Attaching ICD-10 Codes' },
        { title: 'Attaching CPT Codes' },
        { title: 'Billing Status Lifecycle' },
        { title: 'Exporting Patient Data' },
      ],
    },
    {
      id: 'coding',
      title: 'Medical Coding',
      description: 'Reference guides for ICD-10-CM diagnostic codes and CPT procedure codes.',
      icon: `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><circle cx="11" cy="11" r="8"/><path d="m21 21-4.35-4.35"/></svg>`,
      articles: [
        { title: 'ICD-10-CM Structure', badge: 'ICD-10', badgeColor: 'blue' },
        { title: 'CPT Code Categories', badge: 'CPT', badgeColor: 'green' },
        { title: 'Code Search Tips' },
        { title: 'Modifier Usage' },
      ],
    },
    {
      id: 'reports',
      title: 'Reports & Analytics',
      description: 'Generate, filter, and export reports for your coding activity.',
      icon: `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M3 3v18h18"/><path d="m19 9-5 5-4-4-3 3"/></svg>`,
      articles: [
        { title: 'Encounters by Month' },
        { title: 'Top Diagnoses Report' },
        { title: 'Export to PDF', badge: 'PDF', badgeColor: 'sky' },
        { title: 'Export to Excel', badge: 'Excel', badgeColor: 'green' },
      ],
    },
    {
      id: 'api',
      title: 'API Integration',
      description: 'Integrate MediCode with your existing systems via our REST API.',
      icon: `<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><polyline points="16 18 22 12 16 6"/><polyline points="8 6 2 12 8 18"/></svg>`,
      articles: [
        { title: 'Authentication & JWT', badge: 'Auth', badgeColor: 'purple' },
        { title: 'Patients Endpoints' },
        { title: 'Codes Endpoints' },
        { title: 'Webhooks' },
      ],
    },
  ];
}