{% extends "base.html" %}
{% block title %}User Management – Admin – DocuElevate{% endblock %}

{% block content %}
<div class="container mx-auto px-4 py-8" x-data="adminUsersApp()">

  <!-- ── Header ─────────────────────────────────────────────────────────────── -->
  <div class="mb-6 flex flex-col sm:flex-row sm:items-center sm:justify-between gap-3">
    <div>
      <h1 class="text-3xl font-bold text-gray-900 flex items-center gap-2">
        <i class="fas fa-users text-blue-500" aria-hidden="true"></i>
        User Management
        <span class="text-xs font-semibold text-red-600 bg-red-50 border border-red-200 rounded px-2 py-0.5 ml-1">Admin Only</span>
      </h1>
      <p class="text-gray-500 text-sm mt-1">
        Manage user profiles, per-user upload limits, and document ownership.
      </p>
    </div>
    <button
      type="button"
      @click="openCreateModal()"
      class="inline-flex items-center px-4 py-2 bg-blue-600 hover:bg-blue-700 text-white text-sm font-medium rounded-md shadow-sm focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500"
    >
      <i class="fas fa-user-plus mr-2" aria-hidden="true"></i> Add User Profile
    </button>
  </div>

  <!-- ── Alert banner ───────────────────────────────────────────────────────── -->
  <div x-show="alert.show" x-transition class="mb-4" role="alert" :aria-live="alert.type === 'error' ? 'assertive' : 'polite'">
    <div
      :class="alert.type === 'success'
        ? 'bg-green-50 border-green-400 text-green-800'
        : 'bg-red-50 border-red-400 text-red-800'"
      class="border-l-4 p-4 rounded"
    >
      <p class="font-semibold" x-text="alert.title"></p>
      <p class="text-sm" x-text="alert.message"></p>
    </div>
  </div>

  <!-- ── Search & pagination controls ──────────────────────────────────────── -->
  <div class="mb-4 flex flex-col sm:flex-row gap-3 items-start sm:items-center justify-between">
    <div class="flex-1 max-w-sm">
      <label for="userSearch" class="sr-only">Search users</label>
      <div class="relative">
        <span class="absolute inset-y-0 left-0 pl-3 flex items-center pointer-events-none">
          <i class="fas fa-search text-gray-400 text-sm" aria-hidden="true"></i>
        </span>
        <input
          id="userSearch"
          type="search"
          x-model="search"
          @input.debounce.300ms="fetchUsers(1)"
          placeholder="Filter by user ID…"
          class="w-full pl-9 pr-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-400"
        />
      </div>
    </div>
    <div class="text-sm text-gray-500" x-text="totalLabel"></div>
  </div>

  <!-- ── Table ──────────────────────────────────────────────────────────────── -->
  <div class="bg-white shadow rounded-lg overflow-x-auto">
    <table class="min-w-full divide-y divide-gray-200" aria-label="User list">
      <thead class="bg-gray-50">
        <tr>
          <th scope="col" class="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">User ID</th>
          <th scope="col" class="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Display Name</th>
          <th scope="col" class="px-4 py-3 text-center text-xs font-medium text-gray-500 uppercase tracking-wider">Documents</th>
          <th scope="col" class="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">Last Upload</th>
          <th scope="col" class="px-4 py-3 text-center text-xs font-medium text-gray-500 uppercase tracking-wider">Plan</th>
          <th scope="col" class="px-4 py-3 text-center text-xs font-medium text-gray-500 uppercase tracking-wider">Upload Limit</th>
          <th scope="col" class="px-4 py-3 text-center text-xs font-medium text-gray-500 uppercase tracking-wider">Status</th>
          <th scope="col" class="px-4 py-3 text-right text-xs font-medium text-gray-500 uppercase tracking-wider">Actions</th>
        </tr>
      </thead>
      <tbody class="bg-white divide-y divide-gray-200">
        <template x-if="loading">
          <tr>
            <td colspan="8" class="px-4 py-8 text-center text-gray-400">
              <i class="fas fa-spinner fa-spin mr-2" aria-hidden="true"></i> Loading users…
            </td>
          </tr>
        </template>
        <template x-if="!loading && users.length === 0">
          <tr>
            <td colspan="8" class="px-4 py-8 text-center text-gray-400">
              <i class="fas fa-users-slash text-3xl block mb-2" aria-hidden="true"></i>
              No users found.
              <span x-show="search"> Try a different search term.</span>
              <span x-show="!search"> Upload some documents or add a profile above.</span>
            </td>
          </tr>
        </template>
        <template x-for="user in users" :key="user.user_id">
          <tr class="hover:bg-gray-50">
            <!-- User ID -->
            <td class="px-4 py-3 text-sm">
              <div class="flex items-center gap-2">
                <span class="inline-flex items-center justify-center w-8 h-8 rounded-full bg-blue-100 text-blue-700 font-semibold text-xs flex-shrink-0"
                      x-text="userInitials(user.user_id)" aria-hidden="true"></span>
                <span class="font-mono text-gray-800 text-xs truncate max-w-xs" x-text="user.user_id" :title="user.user_id"></span>
              </div>
            </td>
            <!-- Display name -->
            <td class="px-4 py-3 text-sm text-gray-700" x-text="user.display_name || '—'"></td>
            <!-- Document count -->
            <td class="px-4 py-3 text-sm text-center">
              <a
                :href="`/files?owner_id=${encodeURIComponent(user.user_id)}`"
                class="inline-flex items-center gap-1 text-blue-600 hover:underline font-medium"
                :aria-label="`View ${user.document_count} document${user.document_count !== 1 ? 's' : ''} for ${user.user_id}`"
              >
                <i class="fas fa-file text-xs" aria-hidden="true"></i>
                <span x-text="user.document_count"></span>
              </a>
            </td>
            <!-- Last upload -->
            <td class="px-4 py-3 text-sm text-gray-500 whitespace-nowrap"
                x-text="user.last_upload ? formatDate(user.last_upload) : '—'"></td>
            <!-- Subscription plan -->
            <td class="px-4 py-3 text-sm text-center">
              <span
                :class="{
                  'bg-gray-100 text-gray-600': !user.subscription_tier || user.subscription_tier === 'free',
                  'bg-blue-100 text-blue-700': user.subscription_tier === 'starter',
                  'bg-indigo-100 text-indigo-700': user.subscription_tier === 'professional',
                  'bg-purple-100 text-purple-700': user.subscription_tier === 'business',
                }"
                class="inline-flex items-center gap-1 px-2 py-0.5 rounded-full text-xs font-semibold capitalize"
              >
                <i
                  :class="{
                    'fas fa-seedling': !user.subscription_tier || user.subscription_tier === 'free',
                    'fas fa-rocket': user.subscription_tier === 'starter',
                    'fas fa-star': user.subscription_tier === 'professional',
                    'fas fa-building': user.subscription_tier === 'business',
                  }"
                  aria-hidden="true"
                ></i>
                <span x-text="user.subscription_tier || 'free'"></span>
              </span>
            </td>
            <!-- Upload limit -->
            <td class="px-4 py-3 text-sm text-center text-gray-700">
              <span x-show="user.daily_upload_limit !== null && user.daily_upload_limit !== undefined"
                    class="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-indigo-100 text-indigo-700"
                    x-text="user.daily_upload_limit + ' / day'"></span>
              <span x-show="user.daily_upload_limit === null || user.daily_upload_limit === undefined"
                    class="text-gray-400 text-xs">global default</span>
            </td>
            <!-- Status -->
            <td class="px-4 py-3 text-sm text-center">
              <span
                :class="user.is_blocked
                  ? 'bg-red-100 text-red-700'
                  : 'bg-green-100 text-green-700'"
                class="inline-flex items-center gap-1 px-2 py-0.5 rounded-full text-xs font-medium"
              >
                <i :class="user.is_blocked ? 'fas fa-ban' : 'fas fa-check-circle'" aria-hidden="true"></i>
                <span x-text="user.is_blocked ? 'Blocked' : 'Active'"></span>
              </span>
            </td>
            <!-- Actions -->
            <td class="px-4 py-3 text-sm text-right whitespace-nowrap">
              <button
                type="button"
                @click="openEditModal(user)"
                class="inline-flex items-center px-2.5 py-1.5 text-xs font-medium rounded border border-gray-300 text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-1 focus:ring-blue-500 mr-1"
                :aria-label="`Edit profile for ${user.user_id}`"
              >
                <i class="fas fa-edit mr-1" aria-hidden="true"></i> Edit
              </button>
              <button
                type="button"
                @click="confirmDelete(user)"
                x-show="user.profile_id !== null"
                class="inline-flex items-center px-2.5 py-1.5 text-xs font-medium rounded border border-red-300 text-red-600 bg-white hover:bg-red-50 focus:outline-none focus:ring-2 focus:ring-offset-1 focus:ring-red-400"
                :aria-label="`Delete profile for ${user.user_id}`"
              >
                <i class="fas fa-trash mr-1" aria-hidden="true"></i> Delete
              </button>
            </td>
          </tr>
        </template>
      </tbody>
    </table>
  </div>

  <!-- ── Pagination ─────────────────────────────────────────────────────────── -->
  <div class="mt-4 flex items-center justify-between" x-show="pages > 1">
    <button
      type="button"
      @click="fetchUsers(currentPage - 1)"
      :disabled="currentPage <= 1"
      class="px-3 py-1.5 text-sm border border-gray-300 rounded hover:bg-gray-50 disabled:opacity-40 disabled:cursor-not-allowed"
    >
      <i class="fas fa-chevron-left mr-1" aria-hidden="true"></i> Previous
    </button>
    <span class="text-sm text-gray-500">
      Page <span x-text="currentPage"></span> of <span x-text="pages"></span>
    </span>
    <button
      type="button"
      @click="fetchUsers(currentPage + 1)"
      :disabled="currentPage >= pages"
      class="px-3 py-1.5 text-sm border border-gray-300 rounded hover:bg-gray-50 disabled:opacity-40 disabled:cursor-not-allowed"
    >
      Next <i class="fas fa-chevron-right ml-1" aria-hidden="true"></i>
    </button>
  </div>

  <!-- ══════════════════════════════════════════════════════════════════════════
       EDIT / CREATE MODAL
       ═══════════════════════════════════════════════════════════════════════ -->
  <div
    x-show="modalOpen"
    x-transition:enter="transition ease-out duration-150"
    x-transition:enter-start="opacity-0"
    x-transition:enter-end="opacity-100"
    x-transition:leave="transition ease-in duration-100"
    x-transition:leave-start="opacity-100"
    x-transition:leave-end="opacity-0"
    class="fixed inset-0 z-50 flex items-center justify-center bg-black bg-opacity-50 px-4"
    role="dialog"
    aria-modal="true"
    :aria-labelledby="'modal-title'"
  >
    <div
      class="bg-white rounded-lg shadow-xl w-full max-w-lg"
      @click.outside="modalOpen = false"
    >
      <div class="flex items-center justify-between px-6 py-4 border-b">
        <h2 id="modal-title" class="text-lg font-semibold text-gray-900" x-text="modalTitle"></h2>
        <button
          type="button"
          @click="modalOpen = false"
          class="text-gray-400 hover:text-gray-600 focus:outline-none"
          aria-label="Close dialog"
        >
          <i class="fas fa-times" aria-hidden="true"></i>
        </button>
      </div>

      <form @submit.prevent="saveProfile()">
        <div class="px-6 py-5 space-y-4">

          <!-- User ID (read-only when editing) -->
          <div>
            <label for="modal-user-id" class="block text-sm font-medium text-gray-700 mb-1">User ID</label>
            <input
              id="modal-user-id"
              type="text"
              x-model="form.user_id"
              :readonly="!isCreate"
              :class="!isCreate ? 'bg-gray-100 cursor-not-allowed' : ''"
              class="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-400"
              placeholder="user@example.com or OAuth sub"
              required
              aria-required="true"
              autocomplete="off"
            />
            <p class="text-xs text-gray-400 mt-1">The stable identifier that matches <code>owner_id</code> in documents.</p>
          </div>

          <!-- Display name -->
          <div>
            <label for="modal-display-name" class="block text-sm font-medium text-gray-700 mb-1">Display Name</label>
            <input
              id="modal-display-name"
              type="text"
              x-model="form.display_name"
              maxlength="255"
              class="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-400"
              placeholder="Alice Smith (optional)"
            />
          </div>

          <!-- Daily upload limit -->
          <div>
            <label for="modal-limit" class="block text-sm font-medium text-gray-700 mb-1">
              Daily Upload Limit
              <span class="ml-1 text-xs font-normal text-gray-400">(leave empty to use global default)</span>
            </label>
            <input
              id="modal-limit"
              type="number"
              x-model.number="form.daily_upload_limit"
              min="0"
              class="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-400"
              placeholder="e.g. 50  (0 = unlimited)"
            />
          </div>

          <!-- Notes -->
          <div>
            <label for="modal-notes" class="block text-sm font-medium text-gray-700 mb-1">Admin Notes</label>
            <textarea
              id="modal-notes"
              x-model="form.notes"
              rows="3"
              maxlength="4096"
              class="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-400 resize-y"
              placeholder="Internal notes visible only to admins…"
            ></textarea>
          </div>

          <!-- Blocked toggle -->
          <div class="flex items-center gap-3">
            <label class="relative inline-flex items-center cursor-pointer">
              <input
                type="checkbox"
                x-model="form.is_blocked"
                class="sr-only peer"
                id="modal-blocked"
                role="switch"
                :aria-checked="form.is_blocked"
              />
              <div class="w-10 h-6 bg-gray-200 peer-focus:ring-2 peer-focus:ring-blue-400 rounded-full peer peer-checked:bg-red-500 after:content-[''] after:absolute after:top-[2px] after:left-[2px] after:bg-white after:rounded-full after:h-5 after:w-5 after:transition-all peer-checked:after:translate-x-4"></div>
            </label>
            <label for="modal-blocked" class="text-sm font-medium text-gray-700">
              Block this user
              <span class="text-xs text-gray-400 font-normal">(prevents new document uploads)</span>
            </label>
          </div>

          <!-- Subscription tier -->
          <div>
            <label for="modal-tier" class="block text-sm font-medium text-gray-700 mb-1">
              Subscription Plan
            </label>
            <select
              id="modal-tier"
              x-model="form.subscription_tier"
              class="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-400 bg-white"
            >
              <option value="free">Free — 25 lifetime files</option>
              <option value="starter">Starter — $2.99/mo (5/day, 50/mo, 1 mailbox)</option>
              <option value="professional">Professional — $5.99/mo (15/day, 150/mo, 3 mailboxes)</option>
              <option value="business">Business — $7.99/mo (30/day, 300/mo, unlimited mailboxes)</option>
            </select>
            <p class="text-xs text-gray-400 mt-1">
              Sets the quota limits for this user. Limits are enforced on upload.
            </p>
          </div>

        </div>

        <!-- Footer -->
        <div class="px-6 py-4 border-t flex justify-end gap-3">
          <button
            type="button"
            @click="modalOpen = false"
            class="px-4 py-2 text-sm font-medium border border-gray-300 rounded-md text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-1 focus:ring-gray-400"
          >
            Cancel
          </button>
          <button
            type="submit"
            :disabled="saving"
            class="px-4 py-2 text-sm font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-1 focus:ring-blue-500 disabled:opacity-50 disabled:cursor-not-allowed"
          >
            <span x-show="!saving" x-text="isCreate ? 'Create' : 'Save Changes'"></span>
            <span x-show="saving"><i class="fas fa-spinner fa-spin mr-1" aria-hidden="true"></i> Saving…</span>
          </button>
        </div>
      </form>
    </div>
  </div>

  <!-- ── Delete confirmation modal ──────────────────────────────────────────── -->
  <div
    x-show="deleteModal.open"
    x-transition:enter="transition ease-out duration-100"
    x-transition:enter-start="opacity-0"
    x-transition:enter-end="opacity-100"
    class="fixed inset-0 z-50 flex items-center justify-center bg-black bg-opacity-50 px-4"
    role="dialog"
    aria-modal="true"
    aria-labelledby="delete-modal-title"
  >
    <div class="bg-white rounded-lg shadow-xl w-full max-w-md" @click.outside="deleteModal.open = false">
      <div class="px-6 py-4 border-b">
        <h2 id="delete-modal-title" class="text-lg font-semibold text-gray-900">Delete User Profile</h2>
      </div>
      <div class="px-6 py-5">
        <p class="text-sm text-gray-700">
          Are you sure you want to delete the profile for
          <strong class="font-mono" x-text="deleteModal.user_id"></strong>?
        </p>
        <p class="text-sm text-gray-500 mt-2">
          This only removes the admin-managed profile record. Documents owned by this user are <strong>not</strong> deleted.
        </p>
      </div>
      <div class="px-6 py-4 border-t flex justify-end gap-3">
        <button
          type="button"
          @click="deleteModal.open = false"
          class="px-4 py-2 text-sm font-medium border border-gray-300 rounded-md text-gray-700 bg-white hover:bg-gray-50"
        >
          Cancel
        </button>
        <button
          type="button"
          @click="executeDelete()"
          :disabled="deleteModal.deleting"
          class="px-4 py-2 text-sm font-medium rounded-md text-white bg-red-600 hover:bg-red-700 disabled:opacity-50"
        >
          <span x-show="!deleteModal.deleting">Delete Profile</span>
          <span x-show="deleteModal.deleting"><i class="fas fa-spinner fa-spin mr-1" aria-hidden="true"></i> Deleting…</span>
        </button>
      </div>
    </div>
  </div>

</div>

<script>
function adminUsersApp() {
  return {
    // State
    users: [],
    loading: true,
    search: '',
    currentPage: 1,
    perPage: 25,
    total: 0,
    pages: 1,

    // Edit / create modal
    modalOpen: false,
    modalTitle: '',
    isCreate: false,
    saving: false,
    form: {
      user_id: '',
      display_name: '',
      daily_upload_limit: null,
      notes: '',
      is_blocked: false,
      subscription_tier: 'free',
    },

    // Delete modal
    deleteModal: {
      open: false,
      user_id: '',
      deleting: false,
    },

    // Alert
    alert: { show: false, type: 'success', title: '', message: '' },

    get totalLabel() {
      if (this.loading) return '';
      if (this.total === 0) return 'No users';
      return `${this.total} user${this.total !== 1 ? 's' : ''}`;
    },

    async init() {
      await this.fetchUsers(1);
    },

    async fetchUsers(page) {
      this.loading = true;
      this.currentPage = page;
      try {
        const params = new URLSearchParams({
          page: page,
          per_page: this.perPage,
        });
        if (this.search.trim()) params.set('q', this.search.trim());

        const resp = await fetch(`/api/admin/users/?${params}`);
        if (!resp.ok) {
          const err = await resp.json().catch(() => ({}));
          this.showAlert('error', 'Failed to load users', err.detail || resp.statusText);
          return;
        }
        const data = await resp.json();
        this.users = data.users;
        this.total = data.total;
        this.pages = data.pages;
      } catch (e) {
        this.showAlert('error', 'Network error', e.message);
      } finally {
        this.loading = false;
      }
    },

    openCreateModal() {
      this.isCreate = true;
      this.modalTitle = 'Add User Profile';
      this.form = { user_id: '', display_name: '', daily_upload_limit: null, notes: '', is_blocked: false, subscription_tier: 'free' };
      this.modalOpen = true;
    },

    openEditModal(user) {
      this.isCreate = false;
      this.modalTitle = 'Edit User Profile';
      this.form = {
        user_id: user.user_id,
        display_name: user.display_name || '',
        daily_upload_limit: user.daily_upload_limit !== null && user.daily_upload_limit !== undefined
          ? user.daily_upload_limit : null,
        notes: user.notes || '',
        is_blocked: !!user.is_blocked,
        subscription_tier: user.subscription_tier || 'free',
      };
      this.modalOpen = true;
    },

    async saveProfile() {
      this.saving = true;
      try {
        const body = {
          display_name: this.form.display_name || null,
          daily_upload_limit: this.form.daily_upload_limit !== '' && this.form.daily_upload_limit !== null
            ? Number(this.form.daily_upload_limit) : null,
          notes: this.form.notes || null,
          is_blocked: !!this.form.is_blocked,
          subscription_tier: this.form.subscription_tier || 'free',
        };
        const uid = encodeURIComponent(this.form.user_id);
        const resp = await fetch(`/api/admin/users/${uid}`, {
          method: 'PUT',
          headers: {
            'Content-Type': 'application/json',
            'X-CSRF-Token': document.querySelector('meta[name="csrf-token"]')?.content || '',
          },
          body: JSON.stringify(body),
        });
        if (!resp.ok) {
          const err = await resp.json().catch(() => ({}));
          this.showAlert('error', 'Save failed', err.detail || resp.statusText);
          return;
        }
        this.modalOpen = false;
        this.showAlert('success', 'Saved', `Profile for "${this.form.user_id}" has been saved.`);
        await this.fetchUsers(this.currentPage);
      } catch (e) {
        this.showAlert('error', 'Network error', e.message);
      } finally {
        this.saving = false;
      }
    },

    confirmDelete(user) {
      this.deleteModal.user_id = user.user_id;
      this.deleteModal.deleting = false;
      this.deleteModal.open = true;
    },

    async executeDelete() {
      this.deleteModal.deleting = true;
      try {
        const uid = encodeURIComponent(this.deleteModal.user_id);
        const resp = await fetch(`/api/admin/users/${uid}`, {
          method: 'DELETE',
          headers: {
            'X-CSRF-Token': document.querySelector('meta[name="csrf-token"]')?.content || '',
          },
        });
        if (resp.status === 204) {
          this.deleteModal.open = false;
          this.showAlert('success', 'Deleted', `Profile for "${this.deleteModal.user_id}" has been removed.`);
          await this.fetchUsers(this.currentPage);
        } else {
          const err = await resp.json().catch(() => ({}));
          this.showAlert('error', 'Delete failed', err.detail || resp.statusText);
          this.deleteModal.open = false;
        }
      } catch (e) {
        this.showAlert('error', 'Network error', e.message);
        this.deleteModal.open = false;
      } finally {
        this.deleteModal.deleting = false;
      }
    },

    userInitials(userId) {
      if (!userId) return '?';
      // Try to get initials from email or username
      const parts = userId.split(/[@._\s-]+/);
      return parts.slice(0, 2).map(p => p[0]?.toUpperCase() || '').join('') || userId[0].toUpperCase();
    },

    formatDate(iso) {
      if (!iso) return '—';
      try {
        return new Date(iso).toLocaleDateString(undefined, { year: 'numeric', month: 'short', day: 'numeric' });
      } catch {
        return iso;
      }
    },

    showAlert(type, title, message) {
      this.alert = { show: true, type, title, message };
      setTimeout(() => { this.alert.show = false; }, type === 'success' ? 5000 : 10000);
    },
  };
}
</script>
{% endblock %}