{% extends "base.html" %}
{% block title %}Dropbox Authorization Processing{% endblock %}

{% block content %}
<div class="container mx-auto px-4 py-8">
  <div class="bg-white shadow-md rounded-lg p-6">
    <div class="text-center mb-6">
      <svg xmlns="http://www.w3.org/2000/svg" class="mx-auto h-12 w-12 text-blue-500" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
      </svg>
      <h2 class="text-2xl font-bold mt-4">Processing Authorization</h2>
      <p class="text-gray-600 mt-2">Please wait while we complete the Dropbox authorization process...</p>
    </div>

    <div class="flex justify-center my-6">
      <div class="animate-spin rounded-full h-12 w-12 border-b-2 border-blue-500" role="status" aria-label="Loading"></div>
    </div>

    <div id="processing-message" class="text-center text-gray-700" aria-live="polite">
      <p>Exchanging authorization code for refresh token...</p>
    </div>

    <div id="error-container" class="hidden mt-6" role="alert" aria-live="assertive">
      <div class="bg-red-50 border-l-4 border-red-400 p-4">
        <div class="flex">
          <div class="flex-shrink-0">
            <svg class="h-5 w-5 text-red-400" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" aria-hidden="true">
              <path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zM8.707 7.293a1 1 0 00-1.414 1.414L8.586 10l-1.293 1.293a1 1 0 101.414 1.414L10 11.414l1.293 1.293a1 1 0 001.414-1.414L11.414 10l1.293-1.293a1 1 0 00-1.414-1.414L10 8.586 8.707 7.293z" clip-rule="evenodd" />
            </svg>
          </div>
          <div class="ml-3">
            <h3 class="text-sm font-medium text-red-800">Error details:</h3>
            <div class="mt-2 text-sm text-red-700" id="error-message">
              <!-- Error message will be inserted here -->
            </div>
          </div>
        </div>
      </div>
      <div class="mt-4">
        <a id="return-to-setup-link" href="/dropbox-setup" class="inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md shadow-sm text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500">
          Return to Setup
        </a>
      </div>
    </div>

    <div id="success-container" class="hidden mt-6" aria-live="polite">
      <div class="rounded-md bg-green-50 p-4">
        <div class="flex">
          <div class="flex-shrink-0">
            <svg class="h-5 w-5 text-green-400" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" aria-hidden="true">
              <path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clip-rule="evenodd" />
            </svg>
          </div>
          <div class="ml-3">
            <p class="text-sm font-medium text-green-800">
              Dropbox authorization successful! Your refresh token has been saved.
            </p>
          </div>
        </div>
      </div>

      <div class="mt-6 p-4 bg-gray-100 rounded-md">
        <h3 class="font-medium text-lg mb-2">Configuration for Worker Nodes</h3>
        <p class="text-sm text-gray-600 mb-3">
          Copy these environment variables to configure all worker nodes:
        </p>

        <div class="relative">
          <pre id="env-vars" class="bg-gray-800 text-green-400 text-sm p-3 rounded overflow-x-auto"><code></code></pre>

          <button id="copy-env-vars" class="absolute top-2 right-2 bg-gray-700 hover:bg-gray-600 text-white text-xs py-1 px-2 rounded">
            Copy
          </button>
        </div>

        <p class="text-xs text-gray-500 mt-2">
          Add these variables to your .env file or environment configuration.
        </p>
      </div>

      <div class="mt-4 text-center">
        <a href="/status" class="inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md shadow-sm text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500">
          Go to Status Page
        </a>
      </div>
    </div>
  </div>
</div>
{% endblock %}

{% block scripts %}
<script>
document.addEventListener('DOMContentLoaded', function() {
  const code = "{{ code }}";

  // Get credentials from session storage (these take precedence over server-provided values)
  const appKey = sessionStorage.getItem('dropbox_app_key') || "{{ app_key_value }}";
  const appSecret = sessionStorage.getItem('dropbox_app_secret') || "{{ app_secret_value }}";
  const folderPath = sessionStorage.getItem('dropbox_folder_path') || "{{ folder_path }}" || '/Documents/Uploads';
  const integrationId = sessionStorage.getItem('oauth_integration_id');

  // In user mode, point the "Return to Setup" link back to the wizard with integration_id
  if (integrationId) {
    const returnLink = document.getElementById('return-to-setup-link');
    if (returnLink) {
      returnLink.href = `/dropbox-setup?integration_id=${encodeURIComponent(integrationId)}`;
    }
  }

  const redirectUri = window.location.origin + "/dropbox-callback";

  // Automatically exchange the code for a refresh token
  if (code) {
    if (!appKey || !appSecret) {
      showError("Missing App Key or App Secret. Please go back to the setup page and try again.");
      return;
    }

    exchangeCode(code, appKey, appSecret, redirectUri);
  } else {
    showError("No authorization code was found in the URL");
  }

  function exchangeCode(code, appKey, appSecret, redirectUri) {
    const formData = new FormData();
    formData.append('client_id', appKey);
    formData.append('client_secret', appSecret);
    formData.append('redirect_uri', redirectUri);
    formData.append('code', code);
    formData.append('folder_path', folderPath);

    document.getElementById('processing-message').innerHTML =
      '<p>Exchanging authorization code for refresh token...</p>';

    fetch('/api/dropbox/exchange-token', {
      method: 'POST',
      body: formData
    })
    .then(response => {
      if (!response.ok) {
        return response.json().then(err => {
          throw new Error(err.detail || 'Failed to exchange token');
        });
      }
      return response.json();
    })
    .then(data => {
      if (data.refresh_token) {
        // Per-user flow: save to the user's integration record
        if (integrationId) {
          const creds = {
            refresh_token: data.refresh_token,
            app_key: appKey,
            app_secret: appSecret,
          };

          // Only send credentials — the integration's config (folder, source_type, etc.)
          // is already set and must not be overwritten here.
          const body = { credentials: creds };

          document.getElementById('processing-message').innerHTML =
            '<p>Saving credentials to your integration...</p>';

          return fetch(`/api/integrations/${integrationId}`, {
            method: 'PUT',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(body),
          }).then(response => {
            if (!response.ok) {
              return response.json().then(err => {
                throw new Error('Failed to save credentials: ' + (err.detail || 'Unknown error'));
              });
            }
            return response.json();
          }).then(() => {
            // Clean up
            sessionStorage.removeItem('dropbox_app_key');
            sessionStorage.removeItem('dropbox_app_secret');
            sessionStorage.removeItem('dropbox_folder_path');
            sessionStorage.removeItem('oauth_integration_id');

            // Show brief success then redirect to integrations
            document.getElementById('processing-message').innerHTML =
              '<p class="text-green-600 font-semibold">✓ Dropbox authorized successfully!</p>' +
              '<p class="text-sm text-gray-500 mt-2">Redirecting to Integrations...</p>';
            document.querySelector('.animate-spin').parentNode.classList.add('hidden');
            setTimeout(() => { window.location.href = '/integrations'; }, 2000);
          });
        }

        // Global flow: update settings in memory
        const updateFormData = new FormData();
        updateFormData.append('refresh_token', data.refresh_token);

        // Use the app key and app secret from session storage
        if (appKey) updateFormData.append('app_key', appKey);
        if (appSecret) updateFormData.append('app_secret', appSecret);
        if (folderPath) updateFormData.append('folder_path', folderPath);

        document.getElementById('processing-message').innerHTML =
          '<p>Updating system settings with new token...</p>';

        return fetch('/api/dropbox/update-settings', {
          method: 'POST',
          body: updateFormData
        }).then(response => {
          if (!response.ok) {
            return response.json().then(err => {
              throw new Error('Token received but failed to update settings: ' + (err.detail || 'Unknown error'));
            });
          }
          return response.json();
        }).then(() => {
          // Show the success message and environment variables
          showSuccess(data.refresh_token, appKey, appSecret, folderPath);
          // In 10 seconds, redirect to status page (giving time to copy)
          setTimeout(() => {
            window.location.href = '/status';
          }, 10000);

          // Clean up session storage
          sessionStorage.removeItem('dropbox_app_key');
          sessionStorage.removeItem('dropbox_app_secret');
          sessionStorage.removeItem('dropbox_folder_path');
        });
      } else {
        throw new Error('No refresh token was received from the server');
      }
    })
    .catch(error => {
      showError(error.message);
    });
  }

  function showError(message) {
    document.getElementById('processing-message').classList.add('hidden');
    document.getElementById('error-container').classList.remove('hidden');
    document.getElementById('error-message').innerText = message;

    // Hide the spinner when showing error
    document.querySelector('.animate-spin').parentNode.classList.add('hidden');
  }

  function showSuccess(refreshToken, appKey, appSecret, folderPath) {
    document.getElementById('processing-message').classList.add('hidden');
    document.getElementById('success-container').classList.remove('hidden');

    // Hide the spinner when showing success
    document.querySelector('.animate-spin').parentNode.classList.add('hidden');

    // Update the environment variables pre block with the new token
    const envVarsCode = document.querySelector('#env-vars code');
    if (envVarsCode) {
      envVarsCode.textContent = `DROPBOX_APP_KEY=${appKey}
DROPBOX_APP_SECRET=${appSecret}
DROPBOX_REFRESH_TOKEN=${refreshToken}
DROPBOX_FOLDER=${folderPath || '/Documents/Uploads'}`;
    }

    // Add copy functionality
    const copyEnvVarsBtn = document.getElementById('copy-env-vars');
    if (copyEnvVarsBtn) {
      copyEnvVarsBtn.addEventListener('click', function() {
        const envVarsText = document.getElementById('env-vars').textContent;
        navigator.clipboard.writeText(envVarsText)
          .then(() => {
            const originalText = copyEnvVarsBtn.textContent;
            copyEnvVarsBtn.textContent = 'Copied!';
            copyEnvVarsBtn.classList.add('bg-green-700');
            setTimeout(() => {
              copyEnvVarsBtn.textContent = originalText;
              copyEnvVarsBtn.classList.remove('bg-green-700');
            }, 2000);
          })
          .catch(err => {
            console.error('Failed to copy: ', err);
            alert('Failed to copy text to clipboard');
          });
      });
    }
  }
});
</script>
{% endblock %}