{% extends "base.html" %}

{% block title %}Shared Links – DocuElevate{% endblock %}

{% block content %}
<div x-data="sharedLinks()" x-init="init(); loadLinks()" class="container mx-auto px-4 py-8 max-w-5xl">
  <header class="mb-8">
    <h1 class="text-2xl font-bold text-gray-900 dark:text-white flex items-center gap-2">
      <i class="fas fa-share-alt text-blue-500" aria-hidden="true"></i>
      Shared Links
    </h1>
    <p class="mt-2 text-gray-600 dark:text-gray-400 text-sm leading-relaxed max-w-2xl">
      Share documents with anyone via a time-limited or view-limited link.
      Recipients do not need a DocuElevate account.  Links can be password-protected
      and revoked at any time.
    </p>
  </header>

  <!-- Create link section -->
  <section class="bg-white dark:bg-gray-800 shadow rounded-lg p-6 mb-6" aria-labelledby="create-link-heading">
    <h2 id="create-link-heading" class="text-lg font-semibold text-gray-900 dark:text-white mb-4">Create New Shared Link</h2>

    <form @submit.prevent="createLink()" class="space-y-4">
      <!-- File ID -->
      <div class="flex flex-col sm:flex-row gap-3 items-start sm:items-end">
        <div class="flex-1">
          <label for="file-id-input" class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
            File ID <span class="text-red-500" aria-hidden="true">*</span>
          </label>
          <input
            id="file-id-input"
            type="number"
            x-model.number="newLink.file_id"
            placeholder="e.g. 42"
            required
            min="1"
            class="w-full px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm
                   focus:outline-none focus:ring-2 focus:ring-blue-500 dark:bg-gray-700 dark:text-white text-sm"
            aria-required="true"
          />
          <p class="mt-1 text-xs text-gray-500 dark:text-gray-400">
            Find the file ID on the <a href="/files" class="underline hover:text-blue-600">Files</a> page or in the document detail URL.
          </p>
        </div>

        <!-- Label (optional) -->
        <div class="flex-1">
          <label for="link-label-input" class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
            Label <span class="text-gray-400 font-normal">(optional)</span>
          </label>
          <input
            id="link-label-input"
            type="text"
            x-model="newLink.label"
            placeholder="e.g. Shared with Bob"
            maxlength="255"
            class="w-full px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm
                   focus:outline-none focus:ring-2 focus:ring-blue-500 dark:bg-gray-700 dark:text-white text-sm"
          />
        </div>
      </div>

      <!-- Expiry + max views row -->
      <div class="flex flex-col sm:flex-row gap-4">
        <!-- Expiry -->
        <div class="flex-1">
          <label for="expires-select" class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
            Expiry
          </label>
          <select
            id="expires-select"
            x-model.number="newLink.expires_in_hours"
            class="w-full px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm
                   focus:outline-none focus:ring-2 focus:ring-blue-500 dark:bg-gray-700 dark:text-white text-sm"
          >
            <option :value="null">Never</option>
            <option value="1">1 hour</option>
            <option value="6">6 hours</option>
            <option value="12">12 hours</option>
            <option value="24">24 hours (1 day)</option>
            <option value="72">3 days</option>
            <option value="168">7 days</option>
            <option value="336">14 days</option>
            <option value="720">30 days</option>
          </select>
        </div>

        <!-- Max views -->
        <div class="flex-1">
          <label for="max-views-input" class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
            Max downloads <span class="text-gray-400 font-normal">(optional)</span>
          </label>
          <input
            id="max-views-input"
            type="number"
            x-model.number="newLink.max_views"
            placeholder="Unlimited"
            min="1"
            max="10000"
            class="w-full px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm
                   focus:outline-none focus:ring-2 focus:ring-blue-500 dark:bg-gray-700 dark:text-white text-sm"
          />
        </div>

        <!-- Password -->
        <div class="flex-1">
          <label for="link-password-input" class="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-1">
            Password <span class="text-gray-400 font-normal">(optional)</span>
          </label>
          <input
            id="link-password-input"
            type="password"
            x-model="newLink.password"
            placeholder="Leave blank for no password"
            maxlength="128"
            autocomplete="new-password"
            class="w-full px-4 py-2 border border-gray-300 dark:border-gray-600 rounded-md shadow-sm
                   focus:outline-none focus:ring-2 focus:ring-blue-500 dark:bg-gray-700 dark:text-white text-sm"
          />
        </div>
      </div>

      <!-- Error message -->
      <template x-if="createError">
        <p class="text-sm text-red-600 dark:text-red-400" role="alert" x-text="createError"></p>
      </template>

      <div class="flex justify-end">
        <button
          type="submit"
          :disabled="creating || !newLink.file_id"
          class="inline-flex items-center px-5 py-2 bg-blue-600 text-white text-sm font-medium rounded-md
                 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-500 disabled:opacity-50
                 transition-colors"
          style="min-height:40px; min-width:44px;"
        >
          <i class="fas fa-share-alt mr-2" aria-hidden="true"></i>
          <span x-text="creating ? 'Creating…' : 'Create Link'"></span>
        </button>
      </div>
    </form>

    <!-- Newly created link display -->
    <template x-if="newlyCreatedLink">
      <div class="mt-4 bg-green-50 dark:bg-green-900/30 border border-green-300 dark:border-green-700 rounded-lg p-4" role="alert">
        <div class="flex items-start gap-3">
          <i class="fas fa-check-circle text-green-600 dark:text-green-400 mt-0.5 text-lg" aria-hidden="true"></i>
          <div class="flex-1">
            <p class="font-semibold text-green-800 dark:text-green-200 text-sm">Shared link created!</p>
            <p class="text-green-700 dark:text-green-300 text-xs mt-1">
              Copy and send this link to the recipient.
            </p>
            <div class="mt-3 flex items-center gap-2">
              <code
                class="flex-1 bg-white dark:bg-gray-800 border border-gray-300 dark:border-gray-600 rounded px-3 py-2
                       text-sm font-mono text-gray-900 dark:text-gray-100 select-all break-all"
                x-text="newlyCreatedLink.share_url"
              ></code>
              <button
                type="button"
                @click="copyLink()"
                class="inline-flex items-center px-3 py-2 bg-gray-100 dark:bg-gray-700 border border-gray-300
                       dark:border-gray-600 rounded-md text-sm font-medium text-gray-700 dark:text-gray-200
                       hover:bg-gray-200 dark:hover:bg-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500
                       transition-colors"
                style="min-height:40px; min-width:44px;"
                :aria-label="copied ? 'Copied!' : 'Copy link to clipboard'"
              >
                <i :class="copied ? 'fas fa-check text-green-600' : 'fas fa-copy'" aria-hidden="true"></i>
                <span class="ml-1 hidden sm:inline" x-text="copied ? 'Copied!' : 'Copy'"></span>
              </button>
            </div>
          </div>
        </div>
      </div>
    </template>
  </section>

  <!-- Active links table -->
  <section class="bg-white dark:bg-gray-800 shadow rounded-lg p-6" aria-labelledby="links-heading">
    <div class="flex items-center justify-between mb-4">
      <h2 id="links-heading" class="text-lg font-semibold text-gray-900 dark:text-white">
        Your Shared Links
        <span
          x-show="links.length > 0"
          class="ml-2 inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-blue-100 text-blue-800 dark:bg-blue-900 dark:text-blue-200"
          x-text="links.length"
          aria-label="number of links"
        ></span>
      </h2>
      <button
        @click="loadLinks()"
        type="button"
        class="text-sm text-blue-600 hover:underline focus:outline-none focus:ring-2 focus:ring-blue-500 rounded"
        aria-label="Refresh shared links list"
      >
        <i class="fas fa-sync-alt mr-1" aria-hidden="true"></i>Refresh
      </button>
    </div>

    <!-- Loading state -->
    <template x-if="loading">
      <p class="text-sm text-gray-400 dark:text-gray-500 py-4 text-center">
        <i class="fas fa-spinner fa-spin mr-2" aria-hidden="true"></i>Loading…
      </p>
    </template>

    <!-- Empty state -->
    <template x-if="!loading && links.length === 0">
      <div class="text-center py-10 text-gray-400 dark:text-gray-500">
        <i class="fas fa-share-alt text-3xl mb-3" aria-hidden="true"></i>
        <p class="text-sm">No shared links yet. Create one above to get started.</p>
      </div>
    </template>

    <!-- Links list -->
    <template x-if="!loading && links.length > 0">
      <div class="overflow-x-auto">
        <table class="min-w-full divide-y divide-gray-200 dark:divide-gray-700 text-sm" aria-label="Shared links">
          <thead>
            <tr class="text-left text-xs font-semibold text-gray-500 dark:text-gray-400 uppercase tracking-wider">
              <th scope="col" class="pb-3 pr-4">File / Label</th>
              <th scope="col" class="pb-3 pr-4">Link</th>
              <th scope="col" class="pb-3 pr-4">Expiry</th>
              <th scope="col" class="pb-3 pr-4">Views</th>
              <th scope="col" class="pb-3 pr-4">Status</th>
              <th scope="col" class="pb-3">Actions</th>
            </tr>
          </thead>
          <tbody class="divide-y divide-gray-100 dark:divide-gray-700">
            <template x-for="link in links" :key="link.id">
              <tr class="hover:bg-gray-50 dark:hover:bg-gray-750">
                <!-- File / Label -->
                <td class="py-3 pr-4 max-w-xs">
                  <p class="font-medium text-gray-800 dark:text-gray-200 truncate" x-text="link.original_filename || ('File #' + link.file_id)"></p>
                  <p x-show="link.label" class="text-xs text-gray-500 dark:text-gray-400 truncate" x-text="link.label"></p>
                  <p x-show="link.has_password" class="text-xs text-yellow-600 dark:text-yellow-400 mt-0.5">
                    <i class="fas fa-lock text-xs" aria-hidden="true"></i> Password protected
                  </p>
                </td>
                <!-- Link -->
                <td class="py-3 pr-4">
                  <div class="flex items-center gap-1">
                    <code class="text-xs text-blue-600 dark:text-blue-400 truncate max-w-[140px]" x-text="link.share_url"></code>
                    <button
                      type="button"
                      @click="copyUrl(link.share_url)"
                      class="p-1 text-gray-400 hover:text-gray-600 dark:hover:text-gray-300 focus:outline-none focus:ring-1 focus:ring-blue-500 rounded"
                      aria-label="Copy link"
                      title="Copy link"
                      style="min-height:32px;min-width:32px;"
                    >
                      <i class="fas fa-copy text-xs" aria-hidden="true"></i>
                    </button>
                    <a
                      :href="link.share_url"
                      target="_blank"
                      rel="noopener noreferrer"
                      class="p-1 text-gray-400 hover:text-blue-600 focus:outline-none focus:ring-1 focus:ring-blue-500 rounded"
                      aria-label="Open shared link"
                      title="Open in new tab"
                      style="min-height:32px;min-width:32px;"
                    >
                      <i class="fas fa-external-link-alt text-xs" aria-hidden="true"></i>
                    </a>
                  </div>
                </td>
                <!-- Expiry -->
                <td class="py-3 pr-4 whitespace-nowrap text-gray-600 dark:text-gray-400">
                  <span x-text="formatExpiry(link)"></span>
                </td>
                <!-- Views -->
                <td class="py-3 pr-4 whitespace-nowrap text-gray-600 dark:text-gray-400">
                  <span x-text="link.view_count"></span>
                  <span x-show="link.max_views" x-text="' / ' + link.max_views"></span>
                </td>
                <!-- Status badge -->
                <td class="py-3 pr-4 whitespace-nowrap">
                  <template x-if="!link.is_active">
                    <span class="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-red-100 text-red-700 dark:bg-red-900/40 dark:text-red-300">
                      Revoked
                    </span>
                  </template>
                  <template x-if="link.is_active && isExpired(link)">
                    <span class="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-yellow-100 text-yellow-700 dark:bg-yellow-900/40 dark:text-yellow-300">
                      Expired
                    </span>
                  </template>
                  <template x-if="link.is_active && isViewLimitReached(link)">
                    <span class="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-orange-100 text-orange-700 dark:bg-orange-900/40 dark:text-orange-300">
                      Limit reached
                    </span>
                  </template>
                  <template x-if="link.is_active && !isExpired(link) && !isViewLimitReached(link)">
                    <span class="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-green-100 text-green-700 dark:bg-green-900/40 dark:text-green-300">
                      Active
                    </span>
                  </template>
                </td>
                <!-- Actions -->
                <td class="py-3 whitespace-nowrap">
                  <button
                    x-show="link.is_active"
                    type="button"
                    @click="revokeLink(link.id)"
                    class="inline-flex items-center px-3 py-1.5 text-xs font-medium text-red-600 dark:text-red-400
                           border border-red-300 dark:border-red-700 rounded hover:bg-red-50 dark:hover:bg-red-900/20
                           focus:outline-none focus:ring-2 focus:ring-red-500 transition-colors"
                    style="min-height:32px;min-width:44px;"
                    :aria-label="'Revoke shared link for ' + (link.original_filename || 'file')"
                  >
                    <i class="fas fa-ban mr-1" aria-hidden="true"></i> Revoke
                  </button>
                  <span x-show="!link.is_active" class="text-xs text-gray-400 dark:text-gray-500">—</span>
                </td>
              </tr>
            </template>
          </tbody>
        </table>
      </div>
    </template>
  </section>
</div>

<script>
function sharedLinks() {
  return {
    links: [],
    loading: false,
    creating: false,
    createError: null,
    newlyCreatedLink: null,
    copied: false,
    newLink: {
      file_id: null,
      label: '',
      expires_in_hours: null,
      max_views: null,
      password: '',
    },

    init() {
      // Pre-fill file_id from URL query parameter ?file_id=N
      const params = new URLSearchParams(window.location.search);
      const fid = params.get('file_id');
      if (fid) this.newLink.file_id = parseInt(fid, 10);
    },

    async loadLinks() {
      this.loading = true;
      try {
        const resp = await fetch('/api/shared-links/', {
          headers: { 'X-CSRF-Token': document.querySelector('meta[name="csrf-token"]')?.content || '' },
        });
        if (!resp.ok) throw new Error('Failed to load links');
        this.links = await resp.json();
      } catch (err) {
        console.error('Failed to load shared links', err);
      } finally {
        this.loading = false;
      }
    },

    async createLink() {
      this.creating = true;
      this.createError = null;
      this.newlyCreatedLink = null;
      try {
        const body = {
          file_id: this.newLink.file_id,
        };
        if (this.newLink.label && this.newLink.label.trim()) body.label = this.newLink.label.trim();
        if (this.newLink.expires_in_hours) body.expires_in_hours = parseInt(this.newLink.expires_in_hours);
        if (this.newLink.max_views) body.max_views = parseInt(this.newLink.max_views);
        if (this.newLink.password && this.newLink.password.trim()) body.password = this.newLink.password;

        const resp = await fetch('/api/shared-links/', {
          method: 'POST',
          headers: {
            'Content-Type': 'application/json',
            'X-CSRF-Token': document.querySelector('meta[name="csrf-token"]')?.content || '',
          },
          body: JSON.stringify(body),
        });

        if (!resp.ok) {
          const err = await resp.json().catch(() => ({}));
          this.createError = err.detail || 'Failed to create link';
          return;
        }

        const data = await resp.json();
        this.newlyCreatedLink = data;
        this.newLink = { file_id: null, label: '', expires_in_hours: null, max_views: null, password: '' };
        await this.loadLinks();
      } finally {
        this.creating = false;
      }
    },

    async revokeLink(id) {
      if (!confirm('Revoke this link? Recipients will no longer be able to use it.')) return;
      try {
        const resp = await fetch(`/api/shared-links/${id}`, {
          method: 'DELETE',
          headers: { 'X-CSRF-Token': document.querySelector('meta[name="csrf-token"]')?.content || '' },
        });
        if (!resp.ok) {
          const err = await resp.json().catch(() => ({}));
          alert(err.detail || 'Failed to revoke link');
          return;
        }
        await this.loadLinks();
      } catch (err) {
        alert('Error revoking link');
      }
    },

    copyLink() {
      if (!this.newlyCreatedLink) return;
      navigator.clipboard.writeText(this.newlyCreatedLink.share_url).then(() => {
        this.copied = true;
        setTimeout(() => { this.copied = false; }, 2000);
      });
    },

    copyUrl(url) {
      navigator.clipboard.writeText(url).then(() => {
        // Brief visual feedback handled by the button icon change.
      });
    },

    formatExpiry(link) {
      if (!link.expires_at) return 'Never';
      const d = new Date(link.expires_at);
      return d.toLocaleDateString(undefined, { year: 'numeric', month: 'short', day: 'numeric' }) +
        ' ' + d.toLocaleTimeString(undefined, { hour: '2-digit', minute: '2-digit' });
    },

    isExpired(link) {
      if (!link.expires_at) return false;
      return new Date(link.expires_at) < new Date();
    },

    isViewLimitReached(link) {
      return link.max_views !== null && link.view_count >= link.max_views;
    },
  };
}
</script>
{% endblock %}