{% extends "base.html.jinja" %} {% block content %}
<h1>Welcome to SciPaperLoader</h1>

<div id="results-container"></div>

{% if success %}
<div class="alert alert-success mt-3">{{ success }}</div>
{% endif %} {% if error_message %}
<div class="alert alert-warning mt-3">
  <h4>{{ error_message }}</h4>
  <table class="table table-sm table-bordered">
    <thead>
      <tr>
        <th>Row</th>
        <th>DOI</th>
        <th>Error</th>
      </tr>
    </thead>
    <tbody>
      {% for error in error_samples %}
      <tr>
        <td>{{ error.row }}</td>
        <td>{{ error.doi }}</td>
        <td>{{ error.error }}</td>
      </tr>
      {% endfor %}
    </tbody>
  </table>
  <a href="{{ url_for('upload.download_error_log') }}" class="btn btn-outline-secondary">Download Full Error Log</a>
</div>
{% endif %}

<div class="alert alert-info">
  <p>
    <strong>Instructions:</strong> Please upload a CSV file containing academic
    paper metadata. The file must include the following columns:
  </p>
  <ul>
    <li><code>alternative_id</code> – an alternative title or abbreviation</li>
    <li><code>journal</code> – the journal name</li>
    <li><code>doi</code> – the digital object identifier</li>
    <li><code>issn</code> – the ISSN of the journal</li>
    <li><code>title</code> – the title of the paper</li>
  </ul>
</div>

<form method="post" action="{{ url_for('upload.upload') }}" enctype="multipart/form-data" id="upload-form">
  <div class="form-group">
    <label for="file">Upload CSV File</label>
    <input type="file" name="file" id="file" class="form-control" required />
  </div>
  <div class="form-group mt-3">
    <label for="delimiter">Choose CSV Delimiter</label>
    <select name="delimiter" id="delimiter" class="form-control">
      <option value=",">Comma (,)</option>
      <option value=";">Semicolon (;)</option>
      <option value="\t">Tab (\\t)</option>
      <option value="|">Pipe (|)</option>
    </select>
  </div>
  <button type="submit" class="btn btn-primary mt-3">Upload</button>
</form>

<!-- Progress Modal -->
<div id="progressModal" class="modal fade" tabindex="-1">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title">Processing Your Upload</h5>
      </div>
      <div class="modal-body">
        <div class="progress">
          <div id="progressBar" class="progress-bar" role="progressbar">0%</div>
        </div>
        <p id="progressStatus" class="mt-2 text-center">Starting...</p>
      </div>
    </div>
  </div>
</div>

<script>
  const form = document.getElementById("upload-form");
  form.addEventListener("submit", function (e) {
    e.preventDefault();

    // Display loading state immediately
    const progressModal = new bootstrap.Modal(document.getElementById("progressModal"));
    progressModal.show();
    const progressBar = document.getElementById("progressBar");
    progressBar.style.width = "5%";
    progressBar.textContent = "Starting...";

    const formData = new FormData(form);

    // Disable the form while processing
    const submitButton = form.querySelector("button[type='submit']");
    submitButton.disabled = true;

    fetch(form.action, {
      method: "POST",
      body: formData,
    })
      .then((response) => response.json())
      .then((data) => {
        if (data.error) {
          // Handle error
          progressModal.hide();
          alert(`Error: ${data.error}`);
          submitButton.disabled = false;
          return;
        }

        const taskId = data.task_id;
        const interval = setInterval(() => {
          fetch("{{ url_for('upload.task_status', task_id='') }}" + taskId)
            .then((response) => response.json())
            .then((status) => {
              console.log("Task status:", status);
              if (status.state === "SUCCESS") {
                clearInterval(interval);
                progressBar.style.width = "100%";
                progressBar.textContent = "Completed!";

                setTimeout(() => {
                  progressModal.hide();
                  showResults(status.result);
                  submitButton.disabled = false;
                }, 1000);
              } else if (status.state === "FAILURE") {
                clearInterval(interval);
                progressBar.style.width = "100%";
                progressBar.classList.add("bg-danger");
                progressBar.textContent = "Failed!";

                setTimeout(() => {
                  progressModal.hide();
                  alert(`Task failed: ${status.error || "Unknown error"}`);
                  submitButton.disabled = false;
                }, 1000);
              } else {
                // Update progress bar with more information
                const progress = status.progress || 0;
                progressBar.style.width = `${progress}%`;
                progressBar.textContent = `${progress}% complete`;
                document.getElementById("progressStatus").innerText = `Processing... (${status.state})`;
              }
            })
            .catch((err) => {
              console.error("Failed to check task status:", err);
            });
        }, 1000);
      })
      .catch((err) => {
        console.error("Upload failed:", err);
        progressModal.hide();
        alert("Upload failed. Please try again.");
        submitButton.disabled = false;
      });
  });

  const showResults = (result) => {
    const message = `Upload completed! Added: ${result.added}, Updated: ${result.updated}, Skipped: ${result.skipped}, Errors: ${result.error_count}`;

    let resultHTML = `<div class="alert alert-success">${message}</div>`;

    // Add skipped records information
    if (result.skipped > 0) {
      resultHTML += `
        <div class="alert alert-info">
          <h4>${result.skipped} records were skipped</h4>
          <p>${result.skipped_reason_summary || "Records were skipped because they already exist in the database."}</p>
          ${result.skipped_records && result.skipped_records.length > 0 ? `
            <p>Examples of skipped records:</p>
            <table class="table table-sm table-bordered">
              <thead>
                <tr>
                  <th>Row</th>
                  <th>DOI</th>
                  <th>Reason</th>
                </tr>
              </thead>
              <tbody>
                ${result.skipped_records.map(record => `
                  <tr>
                    <td>${record.row}</td>
                    <td>${record.doi}</td>
                    <td>${record.reason}</td>
                  </tr>
                `).join('')}
              </tbody>
            </table>
          ` : ''}
        </div>`;
    }

    // Existing error display code
    if (result.error_count > 0) {
      resultHTML += `
        <div class="alert alert-warning">
          <h4>Some errors occurred (${result.error_count} total)</h4>
          <p>Showing first ${result.errors.length} of ${result.error_count} errors:</p>
          <table class="table table-sm table-bordered">
            <thead>
              <tr>
                <th>Row</th>
                <th>DOI</th>
                <th>Error</th>
              </tr>
            </thead>
            <tbody>`;

      result.errors.forEach(error => {
        resultHTML += `
          <tr>
            <td>${error.row}</td>
            <td>${error.doi}</td>
            <td>${error.error}</td>
          </tr>`;
      });

      resultHTML += `
            </tbody>
          </table>
          <p class="mt-2">Download the complete error log with all ${result.error_count} errors:</p>
          <a href="/upload/download_error_log/${result.task_id}" class="btn btn-outline-secondary">
            Download Full Error Log
          </a>
        </div>`;
    }

    document.getElementById("results-container").innerHTML = resultHTML;
  };
</script>
{% endblock content %}