---
import MainLayout from '../../layouts/main.astro';
import { withBase } from '@/lib/base-path';
---

<MainLayout title="Architecture - Gitea Mirror">
  <main class="max-w-5xl mx-auto px-4 py-12">
    <div class="sticky top-4 z-10 mb-6">
      <a
        href={withBase('/docs/')}
        class="inline-flex items-center gap-2 px-3 py-1.5 rounded-md bg-card text-foreground hover:bg-muted transition-colors border border-border focus:ring-2 focus:ring-ring outline-none"
      >
        <span aria-hidden="true">&larr;</span> Back to Documentation
      </a>
    </div>

    <article class="bg-card rounded-2xl shadow-lg p-6 md:p-8 border border-border">
      <!-- Header -->
      <div class="mb-12 space-y-4">
        <div class="flex items-center gap-2 text-sm text-muted-foreground mb-2">
          <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 21V5a2 2 0 00-2-2H7a2 2 0 00-2 2v16m14 0h2m-2 0h-5m-9 0H3m2 0h5M9 7h1m-1 4h1m4-4h1m-1 4h1m-1 4h1m-1 4h1"/>
          </svg>
          <span>Architecture Overview</span>
        </div>
        <h1 class="text-4xl font-bold tracking-tight">Gitea Mirror Architecture</h1>
        <p class="text-lg text-muted-foreground leading-relaxed max-w-4xl">
          This document provides a comprehensive overview of the Gitea Mirror application architecture, including component diagrams, project structure, and detailed explanations of each part of the system.
        </p>
      </div>

      <!-- System Overview -->
      <section class="mb-12">
        <h2 class="text-2xl font-bold mb-6">System Overview</h2>
        
        <div class="bg-card/50 border border-border/50 rounded-lg p-6 mb-8">
          <p class="text-base leading-relaxed mb-6">
            Gitea Mirror is a web application that automates the mirroring of GitHub repositories to Gitea instances. It provides a user-friendly interface for configuring, monitoring, and managing mirroring operations without requiring users to edit configuration files or run Docker commands.
          </p>
          
          <div class="space-y-1">
            <h3 class="text-sm font-semibold text-muted-foreground uppercase tracking-wider mb-3">Technology Stack</h3>
            <div class="grid grid-cols-1 md:grid-cols-2 gap-3">
              {[
                { name: 'Astro', desc: 'Web framework for Server-Side Rendering (SSR)' },
                { name: 'React', desc: 'Component library for interactive UI elements' },
                { name: 'Tailwind CSS v4', desc: 'Utility-first CSS framework (with Vite plugin)' },
                { name: 'Shadcn UI', desc: 'UI component library built on Tailwind CSS' },
                { name: 'SQLite', desc: 'Database for storing configuration, state, and events' },
                { name: 'Bun', desc: 'JavaScript runtime and package manager' },
                { name: 'Drizzle ORM', desc: 'Type-safe ORM for database interactions' },
                { name: 'Better Auth', desc: 'Modern authentication library with SSO/OIDC support' }
              ].map(tech => (
                <div class="flex items-start gap-3">
                  <div class="w-2 h-2 rounded-full bg-primary mt-2"></div>
                  <div>
                    <span class="font-semibold text-foreground">{tech.name}</span>
                    <p class="text-sm text-muted-foreground">{tech.desc}</p>
                  </div>
                </div>
              ))}
            </div>
          </div>
        </div>
      </section>

      <div class="my-12 h-px bg-border/50"></div>

      <!-- Architecture Diagram -->
      <section class="mb-12">
        <h2 class="text-2xl font-bold mb-6">Architecture Diagram</h2>
        
        <div class="my-8">
          <div class="architecture-diagram bg-muted/30 rounded-xl p-8 border border-border">
            <div class="grid grid-cols-1 lg:grid-cols-2 gap-8">
              <!-- Gitea Mirror System -->
              <div class="bg-card rounded-lg border-2 border-primary/20 p-6">
                <h3 class="text-lg font-semibold mb-6 text-center text-primary">Gitea Mirror System</h3>
                
                <div class="space-y-4">
                  {[
                    { icon: '🎨', name: 'Frontend', tech: 'Astro + React' },
                    { icon: '⚙️', name: 'Backend', tech: 'Bun Runtime' },
                    { icon: '🗄️', name: 'Database', tech: 'SQLite + Drizzle' }
                  ].map((component, index) => (
                    <>
                      <div class="bg-primary/10 rounded-lg p-4 text-center">
                        <div class="text-2xl mb-2">{component.icon}</div>
                        <h4 class="font-semibold">{component.name}</h4>
                        <p class="text-sm text-muted-foreground mt-1">{component.tech}</p>
                      </div>
                      {index < 2 && (
                        <div class="flex justify-center">
                          <div class="text-muted-foreground">
                            <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M7 16V4m0 0L3 8m4-4l4 4m6 0v12m0 0l4-4m-4 4l-4-4"/>
                            </svg>
                          </div>
                        </div>
                      )}
                    </>
                  ))}
                </div>
              </div>
              
              <!-- External APIs -->
              <div class="space-y-4">
                <div class="bg-card rounded-lg border-2 border-amber-500/20 p-6">
                  <h3 class="text-lg font-semibold mb-6 text-center text-amber-600 dark:text-amber-500">External APIs</h3>
                  
                  <div class="space-y-4">
                    <div class="bg-amber-500/10 rounded-lg p-4 text-center">
                      <div class="text-2xl mb-2">🐙</div>
                      <h4 class="font-semibold">GitHub API</h4>
                      <p class="text-sm text-muted-foreground mt-1">Repository Data Source</p>
                    </div>
                    
                    <div class="bg-amber-500/10 rounded-lg p-4 text-center">
                      <div class="text-2xl mb-2">🍵</div>
                      <h4 class="font-semibold">Gitea API</h4>
                      <p class="text-sm text-muted-foreground mt-1">Mirror Destination</p>
                    </div>
                  </div>
                </div>
                
                <div class="flex items-center justify-center gap-4 mt-6">
                  <div class="text-center">
                    <div class="text-sm text-muted-foreground mb-2">Data Flow</div>
                    <div class="flex items-center gap-2">
                      <span class="text-primary font-semibold">Backend</span>
                      <svg class="w-6 h-6 text-muted-foreground" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M17 8l4 4m0 0l-4 4m4-4H3"/>
                      </svg>
                      <span class="text-amber-600 dark:text-amber-500 font-semibold">APIs</span>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>
      </section>

      <div class="my-12 h-px bg-border/50"></div>

      <!-- Component Breakdown -->
      <section class="mb-12">
        <h2 class="text-2xl font-bold mb-6">Component Breakdown</h2>
        
        <!-- Frontend -->
        <div class="mb-8">
          <h3 class="text-xl font-semibold mb-4">Frontend (Astro + React)</h3>
          <div class="pl-4 border-l-2 border-primary/20">
            <p class="text-muted-foreground mb-4">
              The frontend is built with Astro, a modern web framework that allows for server-side rendering and partial hydration. React components are used for interactive elements, providing a responsive and dynamic user interface.
            </p>
            
            <h4 class="font-semibold mb-3">Key Frontend Components</h4>
            <div class="space-y-3">
              {[
                { name: 'Dashboard', desc: 'Overview of mirroring status and recent activity' },
                { name: 'Repository Management', desc: 'Interface for managing repositories to mirror' },
                { name: 'Organization Management', desc: 'Interface for managing GitHub organizations' },
                { name: 'Configuration', desc: 'Settings for GitHub and Gitea connections' },
                { name: 'Activity Log', desc: 'Detailed log of mirroring operations' }
              ].map(component => (
                <div class="flex gap-3">
                  <span class="text-primary font-mono text-sm">▸</span>
                  <div>
                    <strong>{component.name}</strong>
                    <p class="text-sm text-muted-foreground mt-1">{component.desc}</p>
                  </div>
                </div>
              ))}
            </div>
          </div>
        </div>

        <!-- Backend -->
        <div class="mb-8">
          <h3 class="text-xl font-semibold mb-4">Backend (Bun)</h3>
          <div class="pl-4 border-l-2 border-primary/20">
            <p class="text-muted-foreground mb-4">
              The backend is built with Bun and provides API endpoints for the frontend to interact with. It handles:
            </p>
            
            <div class="space-y-3">
              {[
                'Authentication with Better Auth (email/password, SSO, OIDC)',
                'OAuth2/OIDC provider functionality',
                'GitHub API integration',
                'Gitea API integration',
                'Mirroring operations and job queue',
                'Real-time updates via Server-Sent Events (SSE) at /api/sse/',
                'Job recovery system for interrupted operations',
                'Graceful shutdown handling',
                'Scheduled automatic mirroring',
                'Database interactions with Drizzle ORM'
              ].map(item => (
                <div class="flex gap-3">
                  <span class="text-primary font-mono text-sm">▸</span>
                  <span>{item}</span>
                </div>
              ))}
            </div>
          </div>
        </div>

        <!-- Database -->
        <div>
          <h3 class="text-xl font-semibold mb-4">Database (SQLite + Drizzle ORM)</h3>
          <div class="pl-4 border-l-2 border-primary/20">
            <p class="text-muted-foreground mb-4">
              SQLite with Bun's native SQLite driver is used for data persistence, with Drizzle ORM providing type-safe database interactions. The database stores:
            </p>
            
            <div class="space-y-3">
              {[
                'User accounts and authentication data (Better Auth)',
                'OAuth applications and SSO provider configurations',
                'GitHub and Gitea configuration',
                'Repository and organization information',
                'Mirroring job history and status',
                'Event notifications and their read status',
                'OAuth tokens and consent records'
              ].map(item => (
                <div class="flex gap-3">
                  <span class="text-primary font-mono text-sm">▸</span>
                  <span>{item}</span>
                </div>
              ))}
            </div>
          </div>
        </div>
      </section>

      <div class="my-12 h-px bg-border/50"></div>

      <!-- Data Flow -->
      <section class="mb-12">
        <h2 class="text-2xl font-bold mb-6">Data Flow</h2>
        
        <div class="bg-gradient-to-r from-primary/5 to-transparent rounded-lg p-6 border-l-4 border-primary">
          <ol class="space-y-4">
            {[
              { title: 'User Authentication', desc: 'Users authenticate via Better Auth using email/password, SSO providers, or as OIDC clients.' },
              { title: 'Configuration', desc: 'Users configure GitHub and Gitea settings through the UI, which are stored in the SQLite database.' },
              { title: 'Repository Discovery', desc: 'The backend queries the GitHub API to discover repositories based on user configuration.' },
              { title: 'Mirroring Process', desc: 'When triggered, the backend fetches repository data from GitHub and pushes it to Gitea.' },
              { title: 'Status Tracking', desc: 'All operations are logged in the database and displayed in the Activity Log.' }
            ].map((step, index) => (
              <li class="flex gap-4">
                <span class="flex-shrink-0 w-8 h-8 bg-primary/10 rounded-full flex items-center justify-center text-sm font-semibold">
                  {index + 1}
                </span>
                <div>
                  <strong class="text-foreground">{step.title}</strong>
                  <p class="text-sm text-muted-foreground mt-1">{step.desc}</p>
                </div>
              </li>
            ))}
          </ol>
        </div>
      </section>

      <div class="my-12 h-px bg-border/50"></div>

      <!-- Project Structure -->
      <section class="mb-12">
        <h2 class="text-2xl font-bold mb-6">Project Structure</h2>
        
        <div class="bg-muted/30 rounded-lg p-4">
          <pre class="text-sm"><code>{`gitea-mirror/
├── src/                  # Source code
│   ├── components/       # React components
│   ├── content/          # Documentation and content
│   ├── layouts/          # Astro layout components
│   ├── lib/              # Utility functions and database
│   ├── pages/            # Astro pages and API routes
│   └── styles/           # CSS and Tailwind styles
├── public/               # Static assets
├── data/                 # Database and persistent data
├── docker/               # Docker configuration
└── scripts/              # Utility scripts for deployment and maintenance
    ├── gitea-mirror-lxc-local.sh    # Local LXC deployment script
    └── manage-db.ts                 # Database management tool`}</code></pre>
        </div>
      </section>

      <div class="my-12 h-px bg-border/50"></div>

      <!-- Deployment Options -->
      <section>
        <h2 class="text-2xl font-bold mb-6">Deployment Options</h2>
        
        <p class="text-muted-foreground mb-6">Gitea Mirror supports multiple deployment options:</p>
        
        <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4 mb-6">
          {[
            { icon: '🐳', name: 'Docker', desc: 'Run as a containerized application using Docker and docker-compose' },
            { icon: '📦', name: 'LXC Containers', desc: 'Deploy in Linux Containers on Proxmox VE using community script' },
            { icon: '🏃', name: 'Native', desc: 'Run directly on the host system using Bun runtime' }
          ].map(option => (
            <div class="bg-card rounded-lg border border-border p-4 hover:border-primary/50 transition-colors">
              <div class="flex items-start gap-3">
                <div class="text-2xl">{option.icon}</div>
                <div>
                  <h4 class="font-semibold mb-1">{option.name}</h4>
                  <p class="text-sm text-muted-foreground">{option.desc}</p>
                </div>
              </div>
            </div>
          ))}
        </div>
        
        <div class="bg-muted/30 rounded-lg p-4 mt-6">
          <h4 class="font-semibold mb-3">Deployment Advantages</h4>
          <div class="space-y-2">
            <div class="flex gap-3">
              <strong class="text-primary">Docker:</strong>
              <span class="text-muted-foreground">Isolation, easy updates, consistent environment</span>
            </div>
            <div class="flex gap-3">
              <strong class="text-primary">LXC:</strong>
              <span class="text-muted-foreground">Lightweight virtualization, better performance than Docker, system-level isolation</span>
            </div>
            <div class="flex gap-3">
              <strong class="text-primary">Native:</strong>
              <span class="text-muted-foreground">Best performance, direct access to system resources</span>
            </div>
          </div>
        </div>
        
        <div class="mt-4 text-sm text-muted-foreground">
          <p><strong>Note:</strong> LXC deployment is available through the <a href="https://community-scripts.github.io/ProxmoxVE/scripts?id=gitea-mirror" class="text-primary hover:underline">Proxmox VE Community Scripts</a> project.</p>
        </div>
      </section>
    </article>
  </main>
</MainLayout>